--- Class Resources preview module.
--- Menu-only composition for ClassPower, detached Player Power, and the
--- optional Class Resources Player HP bar. Runtime refresh remains outside the
--- drag loop; drag writes saved offsets and repaints only this preview.
local addonName, MSUF = ...
MSUF = MSUF or {}
local ExportPublic = MSUF.ExportPublic or function(name, value)
    _G[name] = value
    return value
end
local M = MSUF.MSUF2 or {}
MSUF.MSUF2 = M
local Preview = M.ClassPowerStackPreview or {}
M.ClassPowerStackPreview = Preview
local W = M.Widgets
local T = M.Theme
local CPPreview = M.ClassPowerPreview or {}
local Helpers = M.PreviewHelpers or {}
local ZoomPan = Preview.ZoomPan or {}
Preview.ZoomPan = ZoomPan
local floor = math.floor
local max = math.max
local min = math.min
local WHITE8 = "Interface\\Buttons\\WHITE8X8"
local PREVIEW_BORDER_COLOR = { 1.00, 0.02, 0.02, 1.00 }
local CP_PREVIEW_REFRESH_DELAY = 0.05
local CP_PREVIEW_ANIMATION_INTERVAL = 0.05
local CP_SHAPES, POWER_SHAPES = CPPreview.CLASS_SHAPES, CPPreview.POWER_SHAPES
local NormalizeClassShape, ResolvePowerShape = CPPreview.NormalizeClassShape, CPPreview.ResolvePowerShape
local CP_OUTLINE_OPTS = {
    linesKey = "_msufCPPreviewEdges",
    maxEdgeSize = 8,
    texture = WHITE8,
    color = function() return PREVIEW_BORDER_COLOR[1], PREVIEW_BORDER_COLOR[2], PREVIEW_BORDER_COLOR[3], PREVIEW_BORDER_COLOR[4] end,
}
local HP_TEXT_REVERSE = { CURMAX = "MAXCUR", MAXCUR = "CURMAX", CURPERCENT = "PERCENTCUR", PERCENTCUR = "CURPERCENT", MAXPERCENT = "PERCENTMAX", PERCENTMAX = "MAXPERCENT", CURMAXPERCENT = "PERCENTCURMAX", PERCENTCURMAX = "CURMAXPERCENT", PERCENTMAXCUR = "CURMAXPERCENT" }
local DELIMITERS = { [""] = " ", ["-"] = " - ", ["/"] = " / ", ["\\"] = " \\ ", ["|"] = " | ", ["<"] = " < ", [">"] = " > ", ["~"] = " ~ ", [":"] = " : " }
local function TR(text)
    return (M.Tr and M.Tr(text)) or text
end
local function RequestClassPowerPreviewRefresh(box, reason)
    if not (box and box.Refresh) then return end
    box._msufCPRefreshReason = reason or box._msufCPRefreshReason
    if box._msufCPRefreshQueued then return end
    box._msufCPRefreshQueued = true
    box._msufCPRefreshSerial = (tonumber(box._msufCPRefreshSerial) or 0) + 1
    local serial = box._msufCPRefreshSerial
    local function Run()
        if not box or serial ~= box._msufCPRefreshSerial then return end
        local refreshReason = box._msufCPRefreshReason
        box._msufCPRefreshReason = nil
        box._msufCPRefreshQueued = nil
        if box.IsShown and not box:IsShown() then return end
        if box.IsVisible and not box:IsVisible() then return end
        box:Refresh(refreshReason or "CLASSPOWER_PREVIEW_REFRESH")
    end
    if C_Timer and C_Timer.After then
        C_Timer.After(CP_PREVIEW_REFRESH_DELAY, Run)
    else
        Run()
    end
end
local function SetPreviewSummary(box, classFrame, powerFrame, hpFrame)
    if not (box and box.summary and box.summary.SetText) then return end
    local parts = {}
    if classFrame then parts[#parts + 1] = "Class Resource" end
    if powerFrame then parts[#parts + 1] = "Player Power" end
    if hpFrame then parts[#parts + 1] = "Second HP" end
    if #parts == 0 then
        box.summary:SetText(TR("Shown here: Player frame reference only"))
    else
        box.summary:SetText(TR("Shown here: ") .. table.concat(parts, " + "))
    end
end
if Helpers.InstallZoomPan and not ZoomPan._msufCPPreviewInstalled then
    ZoomPan._msufCPPreviewInstalled = true
    Helpers.InstallZoomPan(ZoomPan, {
        configureTableOnly = true,
        readoutField = "zoomReadout",
        fitButtonTextPath = { "zoomFitButton", "fs" },
        panPrefix = "_msufCPPreview",
        hintField = "hint",
        updateHintKey = "UpdateHandleHint",
        defaultReason = "CLASSPOWER_PREVIEW_ZOOM",
        stepReason = "CLASSPOWER_PREVIEW_ZOOM_STEP",
        buttonTextureKey = "WHITE8",
        buttonFontField = "fs",
        refresh = function(box, reason)
            if box and box.Refresh then box:Refresh(reason or "CLASSPOWER_PREVIEW_ZOOM") end
        end,
    })
end
local CP_PREVIEW_LAYERS = {
    { key = "guides", label = "Guides", color = { 0.42, 0.72, 1.00 }, tooltip = "Mover handles and selected borders." },
    { key = "border", label = "Border", color = PREVIEW_BORDER_COLOR, tooltip = "Actual HP, Power and Class Resource outlines." },
    { key = "reference", label = "Reference", color = { 0.60, 0.66, 0.78 }, tooltip = "Player frame reference used for relative layout." },
    { key = "class", label = "Resource", color = { 0.30, 0.78, 0.55 }, tooltip = "Class resource bar or pips." },
    { key = "classText", label = "Res Text", color = { 0.30, 0.78, 0.55 }, tooltip = "Class resource numeric text." },
    { key = "power", label = "Power Bar", color = { 0.95, 0.72, 0.18 }, tooltip = "Detached player power bar bound to Class Resources." },
    { key = "powerText", label = "Power Txt", color = { 0.95, 0.72, 0.18 }, tooltip = "Detached player power text." },
    { key = "hp", label = "HP Bar", color = { 0.25, 0.90, 0.42 }, tooltip = "Extra player HP bar in Class Resources." },
    { key = "hpText", label = "HP Text", color = { 0.25, 0.90, 0.42 }, tooltip = "Extra player HP text." },
    { key = "bounds", label = "Bounds", color = { 1.00, 0.22, 0.12 }, tooltip = "Preview-only bounds around visible elements." },
}
local function Round(value)
    return floor((tonumber(value) or 0) + 0.5)
end
local function Clamp(value, fallback, minValue, maxValue)
    value = tonumber(value) or fallback
    if value < minValue then return minValue end
    if value > maxValue then return maxValue end
    return value
end
local function Alpha(value, fallback)
    value = tonumber(value)
    if value == nil then value = fallback end
    if value == nil then value = 1 end
    if value > 1 then value = value / 100 end
    if value < 0 then return 0 end
    if value > 1 then return 1 end
    return value
end
local function EnsureDB()
    if type(M.EnsureDB) == "function" then return M.EnsureDB() end
    ExportPublic("MSUF_DB", _G.MSUF_DB or {})
    return _G.MSUF_DB
end
local function Bars()
    local db = EnsureDB()
    db.bars = db.bars or {}
    return db.bars
end
local function Player()
    local db = EnsureDB()
    db.player = db.player or {}
    return db.player
end
local function General()
    local db = EnsureDB()
    db.general = db.general or {}
    return db.general
end
local function SetShownSafe(region, shown)
    if not region then return end
    if region.SetShown then
        region:SetShown(shown == true)
    elseif shown then
        region:Show()
    else
        region:Hide()
    end
end
local function PreviewParent(preview)
    return preview and (preview.stage or preview.canvas)
end
local function PreviewGuidesEnabled()
    local general = General()
    if general.classPowerPreviewGuidesEnabled ~= nil then return general.classPowerPreviewGuidesEnabled ~= false end
    return true
end
local function SetPreviewGuidesEnabled(enabled)
    General().classPowerPreviewGuidesEnabled = enabled ~= false
end
local function LayerOn(preview, key)
    if not preview then return false end
    local available = preview.layerAvailable
    if available and available[key] == false then return false end
    local visible = preview.layerVisibility
    if visible and visible[key] == false then return false end
    return true
end
local function GuidesOn(preview)
    return LayerOn(preview, "guides")
end
local function RefreshLayerButtons(preview)
    local buttons = preview and preview.layerButtons
    if not buttons then return end
    for i = 1, #buttons do
        if buttons[i].Refresh then buttons[i]:Refresh() end
    end
end
local function NormalizeAlign(value)
    value = tostring(value or "CENTER"):upper()
    if value == "LEFT" or value == "RIGHT" then return value end
    return "CENTER"
end
local function ResolveHPShape(bars, player)
    local value = tostring(bars and bars.playerHPBarShape or "BAR"):upper()
    if value ~= "FOLLOW_POWER" then return ResolvePowerShape(value, bars and bars.classPowerShape) end
    if not (player and player.powerBarDetached == true) then return "BAR" end
    return ResolvePowerShape(player.detachedPowerBarShape or "FOLLOW_CLASS", bars and bars.classPowerShape)
end
local function ShapeOutlineAlpha(value)
    value = tonumber(value) or 0
    if value <= 0 then return 0 end
    if value >= 8 then return 1 end
    return 0.49 + (value * 0.065)
end
local function AutoFitPips(segCount, height, gap)
    segCount = floor(tonumber(segCount) or 1)
    if segCount < 1 then segCount = 1 elseif segCount > 10 then segCount = 10 end
    height = floor(tonumber(height) or 1)
    if height < 1 then height = 1 end
    gap = floor(tonumber(gap) or 0)
    if gap < 0 then gap = 0 elseif gap > 8 then gap = 8 end
    return (segCount * height) + ((segCount - 1) * gap)
end
local function AnimationEnabled(preview)
    return preview and preview._animationEnabled == true
end
local function PreviewElapsed(preview)
    return tonumber(preview and preview._animationElapsed) or 0
end
local function AnimatedMeterFraction(preview, fallback, speed, low, high)
    if not AnimationEnabled(preview) then return fallback end
    speed = tonumber(speed) or 0.42
    low = tonumber(low) or 0.08
    high = tonumber(high) or 0.96
    local phase = (PreviewElapsed(preview) * speed) % 2
    local wave = phase <= 1 and phase or (2 - phase)
    return low + (wave * (high - low))
end
local function PreviewOutline(preview, value, fallback)
    if not LayerOn(preview, "border") then return 0 end
    return Clamp(value, fallback or 0, 0, 8)
end
local function ResolveTexture(key, fallback)
    if CPPreview.ResolveTexture then return CPPreview.ResolveTexture(key, fallback) end
    if key and key ~= "" and type(_G.MSUF_ResolveStatusbarTextureKey) == "function" then
        local path = _G.MSUF_ResolveStatusbarTextureKey(key)
        if path and path ~= "" then return path end
    end
    if fallback and fallback ~= "" then return fallback end
    if type(_G.MSUF_GetBarTexture) == "function" then
        local path = _G.MSUF_GetBarTexture()
        if path and path ~= "" then return path end
    end
    return WHITE8
end
local PREVIEW_CLASS_BY_PREFIX = { deathknight = "DEATHKNIGHT", demonhunter = "DEMONHUNTER", druid = "DRUID", evoker = "EVOKER", hunter = "HUNTER", mage = "MAGE", monk = "MONK", paladin = "PALADIN", priest = "PRIEST", rogue = "ROGUE", shaman = "SHAMAN", warlock = "WARLOCK", warrior = "WARRIOR" }
local function PreviewClassToken(spec)
    if spec and spec.classToken then return tostring(spec.classToken):upper() end
    if spec and spec.class then return tostring(spec.class):upper() end
    if type(M.GetClassPowerPreviewClassToken) == "function" then
        local class = M.GetClassPowerPreviewClassToken()
        if class then return tostring(class):upper() end
    end
    local key = tostring((spec and spec.key) or "")
    local prefix = key:match("^([^_]+)")
    return prefix and PREVIEW_CLASS_BY_PREFIX[prefix] or nil
end
local function ClassColor(dr, dg, db, spec)
    local class = PreviewClassToken(spec)
    if not class and UnitClass then
        local _
        _, class = UnitClass("player")
    end
    if type(_G.MSUF_UFCore_GetClassBarColorFast) == "function" then
        local r, g, b = _G.MSUF_UFCore_GetClassBarColorFast(class)
        if r then return r, g, b end
    end
    local c = class and _G.RAID_CLASS_COLORS and _G.RAID_CLASS_COLORS[class]
    if c then return c.r, c.g, c.b end
    return dr or 0.95, dg or 0.82, db or 0.10
end
local function PowerColor()
    local pbc = _G.PowerBarColor
    local c = pbc and (pbc.ENERGY or pbc.MANA)
    if c then return c.r or c[1] or 1, c.g or c[2] or 0.82, c.b or c[3] or 0.10 end
    return 1.00, 0.86, 0.12
end
local function CPToken(spec, value)
    if CPPreview.TokenForValue then return CPPreview.TokenForValue(spec, value) end
    return spec and spec.token
end
local function CPBaseColor(spec, bars, fallbackR, fallbackG, fallbackB)
    if CPPreview.ResolveBaseColor then return CPPreview.ResolveBaseColor(spec, bars, fallbackR, fallbackG, fallbackB) end
    return fallbackR or 1, fallbackG or 1, fallbackB or 1
end
local function CPColor(token, fallbackR, fallbackG, fallbackB)
    if CPPreview.ResolveColor then return CPPreview.ResolveColor(token, fallbackR, fallbackG, fallbackB) end
    return fallbackR or 1, fallbackG or 1, fallbackB or 1
end
local function CPTextColor(fallbackR, fallbackG, fallbackB)
    if CPPreview.ResolveTextColor then return CPPreview.ResolveTextColor(fallbackR, fallbackG, fallbackB) end
    return fallbackR or 1, fallbackG or 1, fallbackB or 1
end
local function CPBgColor(token)
    if CPPreview.ColorOverride then return CPPreview.ColorOverride("classPowerBgColorOverrides", token) end
    return nil
end
local function HPColor(bars, spec)
    local mode = tostring(bars and bars.playerHPBarColorMode or "GLOBAL"):upper()
    if mode == "DARK" then
        local cache = type(_G.MSUF_UFCore_GetSettingsCache) == "function" and _G.MSUF_UFCore_GetSettingsCache() or nil
        return (cache and cache.darkBarR) or 0.07, (cache and cache.darkBarG) or 0.07, (cache and cache.darkBarB) or 0.08
    end
    if mode == "GRADIENT" then
        local pct = 0.74
        local r = pct > 0.5 and (1 - (pct - 0.5) * 2) or 1
        local g = pct > 0.5 and 1 or (pct * 2)
        return r, g, 0
    end
    return ClassColor(0.20, 0.78, 0.26, spec)
end
local function ShortValue(value)
    value = tonumber(value) or 0
    local abbrev = _G.AbbreviateShortNumber or _G.AbbreviateLargeNumbers
    if type(abbrev) == "function" then
        local text = abbrev(value)
        if text ~= nil then return text end
    end
    local absValue = value < 0 and -value or value
    local sign = value < 0 and "-" or ""
    if absValue >= 1000000 then
        local n = floor((absValue / 100000) + 0.5) / 10
        return sign .. (n >= 10 and tostring(floor(n + 0.5)) or string.format("%.1f", n)) .. "M"
    elseif absValue >= 1000 then
        local n = floor((absValue / 100) + 0.5) / 10
        return sign .. (n >= 10 and tostring(floor(n + 0.5)) or string.format("%.1f", n)) .. "K"
    end
    return tostring(floor(value + 0.5))
end
local function ModeText(mode, current, maxValue, delimiter)
    mode = tostring(mode or "NONE"):upper()
    if mode == "NONE" then return "" end
    current = tonumber(current) or 0
    maxValue = tonumber(maxValue) or 1
    if maxValue < 1 then maxValue = 1 end
    delimiter = DELIMITERS[delimiter] or delimiter or " "
    local pct = floor((current / maxValue) * 100 + 0.5)
    if pct < 0 then pct = 0 elseif pct > 100 then pct = 100 end
    local curText, maxText, pctText = ShortValue(current), ShortValue(maxValue), tostring(pct) .. "%"
    if mode == "CURRENT" then return curText end
    if mode == "MAX" then return maxText end
    if mode == "DEFICIT" then
        local missing = maxValue - current
        return missing > 0 and ("-" .. ShortValue(missing)) or ""
    end
    if mode == "PERCENT" then return pctText end
    if mode == "CURMAX" then return curText .. delimiter .. maxText end
    if mode == "MAXCUR" then return maxText .. delimiter .. curText end
    if mode == "CURPERCENT" then return curText .. delimiter .. pctText end
    if mode == "PERCENTCUR" then return pctText .. delimiter .. curText end
    if mode == "MAXPERCENT" then return maxText .. delimiter .. pctText end
    if mode == "PERCENTMAX" then return pctText .. delimiter .. maxText end
    if mode == "CURMAXPERCENT" then return curText .. delimiter .. maxText .. delimiter .. pctText end
    if mode == "PERCENTCURMAX" then return pctText .. delimiter .. curText .. delimiter .. maxText end
    if mode == "PERCENTMAXCUR" then return pctText .. delimiter .. maxText .. delimiter .. curText end
    return curText
end
local function ApplyFont(region, size)
    if not (region and region.SetFont) then return end
    size = Clamp(size, 12, 6, 48)
    local fontPath = type(_G.MSUF_GetFontPath) == "function" and _G.MSUF_GetFontPath() or _G.STANDARD_TEXT_FONT
    local fontFlags = type(_G.MSUF_GetFontFlags) == "function" and _G.MSUF_GetFontFlags() or "OUTLINE"
    if not fontPath or fontPath == "" then fontPath = "Fonts\\FRIZQT__.TTF" end
    if not fontFlags or fontFlags == "" then fontFlags = "OUTLINE" end
    local resolveSafe = _G.MSUF_ResolveSafeFontPath
    if type(resolveSafe) == "function" then
        local g = _G.MSUF_DB and _G.MSUF_DB.general
        fontPath = resolveSafe(fontPath, size, fontFlags, g and g.fontKey)
    end
    local ok, applied = pcall(region.SetFont, region, fontPath, size, fontFlags)
    if not ok or applied == false then
        pcall(region.SetFont, region, "Fonts\\FRIZQT__.TTF", size, fontFlags)
    end
    if region.SetShadowColor then region:SetShadowColor(0, 0, 0, 1) end
    if region.SetShadowOffset then region:SetShadowOffset(1, -1) end
end
local function HideTableRegions(t)
    if not t then return end
    for i = 1, #t do
        if t[i] and t[i].Hide then t[i]:Hide() end
    end
end
local function EnsureOutlineHost(frame)
    local parent = frame and frame:GetParent()
    if not parent then return nil end
    local host = frame._msufCPPreviewOutlineHost
    if not host then
        host = CreateFrame("Frame", nil, parent)
        host:EnableMouse(false)
        frame._msufCPPreviewOutlineHost = host
    end
    if host:GetParent() ~= parent then host:SetParent(parent) end
    return host
end
local function ApplyBarOutline(frame, outline)
    local host = EnsureOutlineHost(frame)
    if not (host and Helpers.LayoutEdgeLines) then return end
    outline = floor((tonumber(outline) or 0) + 0.5)
    if outline <= 0 then
        if Helpers.SetEdgeLinesShown then Helpers.SetEdgeLinesShown(host, false, CP_OUTLINE_OPTS) end
        if host then host:Hide() end
        return
    end
    if outline > 8 then outline = 8 end
    host:ClearAllPoints()
    host:SetPoint("TOPLEFT", frame, "TOPLEFT", -outline, outline)
    host:SetPoint("BOTTOMRIGHT", frame, "BOTTOMRIGHT", outline, -outline)
    local parent = host:GetParent()
    host:SetFrameLevel(((parent and parent.GetFrameLevel and parent:GetFrameLevel()) or 0) + 74)
    host:Show()
    Helpers.LayoutEdgeLines(host, outline, CP_OUTLINE_OPTS)
end
local function HideBarOutline(frame)
    local host = frame and frame._msufCPPreviewOutlineHost
    if host and Helpers.SetEdgeLinesShown then Helpers.SetEdgeLinesShown(host, false, CP_OUTLINE_OPTS) end
    if host then host:Hide() end
end
local function CallApply(handle, reason)
    local kind = handle and handle._applyKind
    local moveOnly = reason == "CLASSPOWER_PREVIEW_MOVE"
    if not moveOnly then
        if kind == "class" or kind == "classText" then
            if type(_G.MSUF_ClassPower_Refresh) == "function" then _G.MSUF_ClassPower_Refresh() end
            if type(_G.MSUF_ApplyPowerBarEmbedLayout_ForUnitKey) == "function" then _G.MSUF_ApplyPowerBarEmbedLayout_ForUnitKey("player", true) end
            if type(_G.MSUF_ClassPower_PlayerHP_Refresh) == "function" then _G.MSUF_ClassPower_PlayerHP_Refresh() end
        elseif kind == "power" or kind == "powerText" then
            if type(_G.MSUF_ApplyPowerBarEmbedLayout_ForUnitKey) == "function" then _G.MSUF_ApplyPowerBarEmbedLayout_ForUnitKey("player", true) end
            if type(_G.MSUF_ClassPower_PlayerHP_Refresh) == "function" then _G.MSUF_ClassPower_PlayerHP_Refresh() end
        elseif kind == "hp" or kind == "hpText" then
            if type(_G.MSUF_ClassPower_PlayerHP_Refresh) == "function" then _G.MSUF_ClassPower_PlayerHP_Refresh() end
        end
    end
    if type(_G.MSUF_UFPreview_RequestRefresh) == "function" then _G.MSUF_UFPreview_RequestRefresh(reason or "CLASSPOWER_PREVIEW_MOVE") end
    if type(M.RequestGeneralApply) == "function" then M.RequestGeneralApply(reason or "MSUF2_CLASSPOWER_PREVIEW_MOVE", { preview = true, power = kind == "power" or kind == "powerText", text = kind == "powerText" or kind == "hpText", applyAll = false, notify = false, history = false }) end
end
local function StoreForHandle(handle)
    if not handle then return nil end
    if handle._store == "player" then return Player() end
    return Bars()
end
local function ReadHandle(handle)
    local store = StoreForHandle(handle)
    local x = store and tonumber(store[handle._xKey]) or nil
    local y = store and tonumber(store[handle._yKey]) or nil
    if x == nil then x = tonumber(handle._defaultX) or 0 end
    if y == nil then y = tonumber(handle._defaultY) or 0 end
    return x, y
end

--- Handle writes update the same SavedVariables offsets used by runtime
--- ClassPower, but only repaint this preview unless the caller asks to apply.
local function WriteHandle(handle, x, y, skipApply)
    local store = StoreForHandle(handle)
    if not (store and handle and handle._xKey and handle._yKey) then return end
    store[handle._xKey] = Round(x)
    store[handle._yKey] = Round(y)
    RequestClassPowerPreviewRefresh(handle._preview, "CLASSPOWER_PREVIEW_DRAG")
    if not skipApply then CallApply(handle, "CLASSPOWER_PREVIEW_MOVE") end
end
local function RefreshHandleVisuals(preview)
    if not (preview and preview.handles) then return end
    local guidesOn = GuidesOn(preview)
    for i = 1, #preview.handles do
        local h = preview.handles[i]
        if h and h._msufPlaced ~= true then
            h:Hide()
        elseif h then
            SetShownSafe(h, guidesOn and LayerOn(preview, h._layerKey or h._key))
        end
        local active = h == preview.selectedHandle or h._hovering == true
        local c = h._color or { 1, 1, 1 }
        if h.SetBackdropColor then h:SetBackdropColor(c[1], c[2], c[3], active and 0.16 or 0.035) end
        if h.SetBackdropBorderColor then h:SetBackdropBorderColor(c[1], c[2], c[3], active and 0.95 or 0.44) end
    end
end
-- Shared preview-keyboard helpers keep ClassPower and Unit preview nudging in
-- lockstep while the DB write/apply behavior remains local to this module.
local IsTextInputFocused = Helpers.IsTextInputFocused or function() return false end
local NudgeStep = Helpers.NudgeStep or function() return 1 end
local function CanNudgeHandle(handle)
    local preview = handle and handle._preview
    return handle ~= nil
        and preview ~= nil
        and handle._msufPlaced == true
        and LayerOn(preview, handle._layerKey or handle._key)
end
local function ShouldSkipDuplicateNudge(preview, dx, dy)
    return Helpers.ShouldSkipDuplicateNudge and Helpers.ShouldSkipDuplicateNudge(preview, dx, dy, {
        sigKey = "_msufCPPreviewLastNudgeSig",
        atKey = "_msufCPPreviewLastNudgeAt",
    }) or false
end
local function NudgeSelectedHandle(preview, dx, dy)
    local handle = preview and preview.selectedHandle
    if not CanNudgeHandle(handle) or IsTextInputFocused() then return false end
    local step = NudgeStep()
    local ndx, ndy = (tonumber(dx) or 0) * step, (tonumber(dy) or 0) * step
    if ShouldSkipDuplicateNudge(preview, ndx, ndy) then return true end
    local x, y = ReadHandle(handle)
    WriteHandle(handle, x + ndx, y + ndy, false)
    return true
end
local function FocusPreviewKeyboardTarget(preview, handle, defer)
    if Helpers.FocusKeyboardTarget then return Helpers.FocusKeyboardTarget(preview, handle, defer, { selectedField = "selectedHandle" }) end
end
local function OnCPPreviewArrowNudge(active, dx, dy)
    if NudgeSelectedHandle(active, dx, dy) then FocusPreviewKeyboardTarget(active, active and active.selectedHandle, true) end
end
local CP_PREVIEW_ARROW_BINDINGS = { ownerName = "MSUF_CPPreview_NudgeOwner", activeName = "MSUF_CPPreview_ActiveNudgeBox", buttonPrefix = "MSUF_CPPreview_Nudge", onClick = OnCPPreviewArrowNudge }
local function SetArrowBindings(preview, enabled)
    return M.SetPreviewArrowBindings(preview, enabled, CP_PREVIEW_ARROW_BINDINGS)
end
local function RegisterPreviewNudgeTarget(preview)
    if Helpers.RegisterEditModeNudgeTarget then
        Helpers.RegisterEditModeNudgeTarget(preview, {
            targetField = "_msufCPPreviewNudgeTarget",
            selectedField = "selectedHandle",
            canNudge = CanNudgeHandle,
            nudgeDelta = function(active, dx, dy)
                local handle = active and active.selectedHandle
                if not CanNudgeHandle(handle) then return false end
                local ndx, ndy = tonumber(dx) or 0, tonumber(dy) or 0
                if ShouldSkipDuplicateNudge(active, ndx, ndy) then return true end
                local x, y = ReadHandle(handle)
                WriteHandle(handle, x + ndx, y + ndy, false)
                return true
            end,
        })
    end
end
local function SelectHandle(handle)
    local preview = handle and handle._preview
    if not preview then return end
    preview.selectedHandle = handle
    FocusPreviewKeyboardTarget(preview, handle, true)
    SetArrowBindings(preview, true)
    RegisterPreviewNudgeTarget(preview)
    RefreshHandleVisuals(preview)
end
local function HandleKeyDown(handle, key)
    if Helpers.ArrowKeyDown then
        return Helpers.ArrowKeyDown(handle, key, {
            selectedField = "selectedHandle",
            nudge = NudgeSelectedHandle,
        })
    end
end
local function BeginHistory(handle)
    if M.BeginHistoryTransaction then return M.BeginHistoryTransaction("Move: " .. tostring(handle and handle._label or "Class Resources preview"), "classPowerPreview:" .. tostring(handle and handle._key or "handle")) end
    return false
end
local function CommitHistory(handle)
    if handle and handle._historyTx and M.CommitHistoryTransaction then
        handle._historyTx = nil
        return M.CommitHistoryTransaction()
    end
    if handle then handle._historyTx = nil end
    return false
end
local function StopHandleDrag(handle, button, skipApply)
    if button and button ~= "LeftButton" then return end
    if not (handle and handle._dragging) then return end
    local preview = handle._preview
    handle._dragging = nil
    if preview and preview.dragFrame and preview.dragFrame._handle == handle then
        preview.dragFrame:SetScript("OnUpdate", nil)
        preview.dragFrame._handle = nil
        preview.dragFrame:Hide()
    end
    RequestClassPowerPreviewRefresh(preview, "CLASSPOWER_PREVIEW_DRAG_END")
    if not skipApply then CallApply(handle, "CLASSPOWER_PREVIEW_DRAG_END") end
    CommitHistory(handle)
    RefreshHandleVisuals(preview)
    FocusPreviewKeyboardTarget(preview, handle, true)
end

--- Drag handles are preview controls, not runtime frames. They carry the DB
--- keys they edit so drag/nudge/history code can stay generic.
local function MakeHandle(preview, key, store, xKey, yKey, defaultX, defaultY, label, color, applyKind, layerKey)
    local h = CreateFrame("Button", nil, PreviewParent(preview), "BackdropTemplate")
    h:SetSize(24, 20)
    h:SetBackdrop({ bgFile = WHITE8, edgeFile = WHITE8, edgeSize = 1 })
    h:SetFrameLevel((preview.canvas:GetFrameLevel() or 0) + 40)
    h:EnableMouse(true)
    h:EnableKeyboard(true)
    if h.SetPropagateKeyboardInput then h:SetPropagateKeyboardInput(false) end
    if h.RegisterForClicks then h:RegisterForClicks("LeftButtonDown", "LeftButtonUp") end
    if h.RegisterForDrag then h:RegisterForDrag("LeftButton") end
    h._preview, h._key, h._store = preview, key, store
    h._xKey, h._yKey = xKey, yKey
    h._defaultX, h._defaultY = defaultX, defaultY
    h._label, h._color, h._applyKind = label, color, applyKind
    h._layerKey = layerKey or key
    h:SetScript("OnEnter", function(self)
        self._hovering = true
        RefreshHandleVisuals(preview)
        if GameTooltip then
            GameTooltip:SetOwner(self, "ANCHOR_RIGHT")
            GameTooltip:SetText(TR(label), 1, 1, 1)
            GameTooltip:AddLine(TR("Drag to move this Class Resources preview element."), 0.82, 0.82, 0.82, true)
            GameTooltip:AddLine(TR("Arrow keys nudge the selected element. Shift = 5, Ctrl = 10."), 0.55, 0.68, 0.86, true)
            GameTooltip:Show()
        end
    end)
    h:SetScript("OnLeave", function(self)
        self._hovering = nil
        RefreshHandleVisuals(preview)
        if GameTooltip then GameTooltip:Hide() end
    end)
    h:SetScript("OnClick", function(self) SelectHandle(self) end)
    h:SetScript("OnKeyDown", HandleKeyDown)
    h:SetScript("OnMouseDown", function(self, button)
        if button ~= "LeftButton" then return end
        if self._dragging then return end
        SelectHandle(self)
        self._dragging = true
        self._startX, self._startY = ReadHandle(self)
        self._lastX, self._lastY = nil, nil
        self._cursorX, self._cursorY = GetCursorPosition()
        self._historyTx = BeginHistory(self)
        preview.dragFrame._handle = self
        preview.dragFrame:SetScript("OnUpdate", preview.dragUpdate)
        preview.dragFrame:Show()
    end)
    h:SetScript("OnMouseUp", function(self, button) StopHandleDrag(self, button, false) end)
    h:SetScript("OnDragStart", function(self) self:GetScript("OnMouseDown")(self, "LeftButton") end)
    h:SetScript("OnDragStop", function(self) StopHandleDrag(self, "LeftButton", false) end)
    h:SetScript("OnHide", function(self)
        StopHandleDrag(self, nil, true)
    end)
    preview.handles[#preview.handles + 1] = h
    h:Hide()
    return h
end
local function PlaceHandle(handle, region, pad)
    if not (handle and region and region.IsShown and region:IsShown()) then
        if handle then
            handle._msufPlaced = false
            handle:Hide()
        end
        return false
    end
    pad = tonumber(pad) or 4
    handle:ClearAllPoints()
    handle:SetPoint("TOPLEFT", region, "TOPLEFT", -pad, pad)
    handle:SetPoint("BOTTOMRIGHT", region, "BOTTOMRIGHT", pad, -pad)
    handle._msufPlaced = true
    handle:Show()
    return true
end
local function PlaceTextHandle(handle, parent, regions)
    if Helpers.PlaceHandleAroundRegions and Helpers.PlaceHandleAroundRegions(handle, parent, regions, 4, { fitText = true }) then
        handle._msufPlaced = true
        return true
    end
    for i = 1, #(regions or {}) do
        local region = regions[i]
        if region and region.IsShown and region:IsShown() then
            handle:ClearAllPoints()
            handle:SetSize(max(24, (region.GetStringWidth and region:GetStringWidth() or 20) + 10), max(18, (region.GetStringHeight and region:GetStringHeight() or 12) + 6))
            handle:SetPoint("CENTER", region, "CENTER", 0, 0)
            handle._msufPlaced = true
            handle:Show()
            return true
        end
    end
    handle._msufPlaced = false
    handle:Hide()
    return false
end
local function MakeText(parent, layer, justify)
    local fs = parent:CreateFontString(nil, layer or "OVERLAY", "GameFontHighlightSmall")
    fs:SetJustifyH(justify or "CENTER")
    if fs.SetJustifyV then fs:SetJustifyV("MIDDLE") end
    if fs.SetWordWrap then fs:SetWordWrap(false) end
    if fs.SetNonSpaceWrap then fs:SetNonSpaceWrap(false) end
    if fs.SetMaxLines then fs:SetMaxLines(1) end
    return fs
end
local function MakeTexture(parent, layer, subLevel, allPoints, hidden)
    local tex = parent:CreateTexture(nil, layer, nil, subLevel)
    tex:SetTexture(WHITE8)
    if allPoints then tex:SetAllPoints() end
    if hidden then tex:Hide() end
    return tex
end
local function EnsureClassPower(preview)
    if preview.classPower then return preview.classPower end
    local frame = CreateFrame("Frame", nil, PreviewParent(preview), "BackdropTemplate")
    frame:SetBackdrop({ bgFile = WHITE8, edgeFile = WHITE8, edgeSize = 1 })
    frame:SetBackdropColor(0, 0, 0, 0)
    frame:SetBackdropBorderColor(0, 0, 0, 0)
    frame.segments, frame.bgs, frame.edges, frame.runeTexts = {}, {}, {}, {}
    for i = 1, 10 do
        frame.bgs[i] = MakeTexture(frame, "BACKGROUND", nil, nil, true)
        frame.segments[i] = MakeTexture(frame, "ARTWORK", nil, nil, true)
        frame.edges[i] = MakeTexture(frame, "OVERLAY", 5, nil, true)
        local runeText = MakeText(frame, "OVERLAY", "CENTER")
        runeText:Hide()
        frame.runeTexts[i] = runeText
    end
    frame.text = MakeText(frame, "OVERLAY", "CENTER")
    frame.text:Hide()
    preview.classPower = frame
    return frame
end
local function EnsureMeter(preview, name)
    if preview[name] then return preview[name] end
    local frame = CreateFrame("Frame", nil, PreviewParent(preview), "BackdropTemplate")
    frame:SetBackdrop({ bgFile = WHITE8, edgeFile = WHITE8, edgeSize = 1 })
    frame:SetBackdropColor(0, 0, 0, 0)
    frame:SetBackdropBorderColor(0, 0, 0, 0)
    frame.bg = MakeTexture(frame, "BACKGROUND", nil, true)
    frame.fill = MakeTexture(frame, "ARTWORK")
    frame.edge = MakeTexture(frame, "OVERLAY", 7, true, true)
    frame.left = MakeText(frame, "OVERLAY", "LEFT")
    frame.center = MakeText(frame, "OVERLAY", "CENTER")
    frame.right = MakeText(frame, "OVERLAY", "RIGHT")
    preview[name] = frame
    return frame
end
local function RenderMeter(frame, shapeInfo, opts)
    opts = opts or {}
    local w = max(1, floor(tonumber(opts.width) or 1))
    local h = max(1, floor(tonumber(opts.height) or 1))
    local frac = tonumber(opts.fraction) or 1
    if frac < 0 then frac = 0 elseif frac > 1 then frac = 1 end
    frame._msufCPPreviewW = w
    frame._msufCPPreviewH = h
    frame._msufCPPreviewShapeAxis = shapeInfo and shapeInfo.axis or nil
    frame._msufCPPreviewHasShape = shapeInfo ~= nil
    frame:SetSize(w, h)
    frame.bg:ClearAllPoints()
    frame.bg:SetAllPoints(frame)
    frame.fill:ClearAllPoints()
    if shapeInfo then
        HideBarOutline(frame)
        frame.bg:SetTexture(shapeInfo.bg)
        frame.bg:SetVertexColor(opts.bgR or opts.r or 1, opts.bgG or opts.g or 1, opts.bgB or opts.b or 1, opts.bgA or 0.28)
        frame.fill:SetTexture(shapeInfo.fill)
        frame.fill:SetVertexColor(opts.r or 1, opts.g or 1, opts.b or 1, frac > 0 and 1 or 0)
        if shapeInfo.axis == "VERTICAL" then
            local fillH = frac > 0 and max(1, floor(h * frac + 0.5)) or 0
            frame.fill:SetTexCoord(0, 1, frac > 0 and (1 - frac) or 1, 1)
            frame.fill:SetSize(w, max(1, fillH))
            frame.fill:SetPoint("BOTTOMLEFT", frame, "BOTTOMLEFT", 0, 0)
            frame.fill:SetPoint("BOTTOMRIGHT", frame, "BOTTOMRIGHT", 0, 0)
        else
            local fillW = frac > 0 and max(1, floor(w * frac + 0.5)) or 0
            frame.fill:SetTexCoord(0, frac, 0, 1)
            frame.fill:SetSize(max(1, fillW), h)
            frame.fill:SetPoint("TOPLEFT", frame, "TOPLEFT", 0, 0)
            frame.fill:SetPoint("BOTTOMLEFT", frame, "BOTTOMLEFT", 0, 0)
        end
        if frac > 0 then frame.fill:Show() else frame.fill:Hide() end
        if frame.edge then
            local outline = floor((tonumber(opts.outline) or 0) + 0.5)
            if outline > 0 then
                frame.edge:SetTexture(shapeInfo.edge)
                frame.edge:SetVertexColor(PREVIEW_BORDER_COLOR[1], PREVIEW_BORDER_COLOR[2], PREVIEW_BORDER_COLOR[3], ShapeOutlineAlpha(outline))
                frame.edge:SetAllPoints(frame)
                frame.edge:Show()
            else
                frame.edge:Hide()
            end
        end
    else
        if frame.edge then frame.edge:Hide() end
        ApplyBarOutline(frame, opts.outline or 0)
        frame.bg:SetTexture(opts.bgTexture or WHITE8)
        frame.bg:SetVertexColor(opts.bgR or 0, opts.bgG or 0, opts.bgB or 0, opts.bgA or 0.35)
        frame.fill:SetTexture(opts.texture or WHITE8)
        frame.fill:SetVertexColor(opts.r or 1, opts.g or 1, opts.b or 1, 1)
        frame.fill:SetTexCoord(0, 1, 0, 1)
        frame.fill:SetSize(frac > 0 and max(1, floor(w * frac + 0.5)) or 1, h)
        frame.fill:SetPoint("TOPLEFT", frame, "TOPLEFT", 0, 0)
        frame.fill:SetPoint("BOTTOMLEFT", frame, "BOTTOMLEFT", 0, 0)
        if frac > 0 then frame.fill:Show() else frame.fill:Hide() end
    end
end
local function UpdateMeterFill(frame, fraction)
    if not (frame and frame.fill) then return false end
    local w = max(1, floor(tonumber(frame._msufCPPreviewW) or (frame.GetWidth and frame:GetWidth()) or 1))
    local h = max(1, floor(tonumber(frame._msufCPPreviewH) or (frame.GetHeight and frame:GetHeight()) or 1))
    local frac = tonumber(fraction) or 0
    if frac < 0 then frac = 0 elseif frac > 1 then frac = 1 end
    local axis = frame._msufCPPreviewShapeAxis
    if axis == "VERTICAL" then
        local fillH = frac > 0 and max(1, floor(h * frac + 0.5)) or 0
        frame.fill:SetTexCoord(0, 1, frac > 0 and (1 - frac) or 1, 1)
        frame.fill:SetHeight(max(1, fillH))
    else
        local fillW = frac > 0 and max(1, floor(w * frac + 0.5)) or 0
        frame.fill:SetTexCoord(0, frame._msufCPPreviewHasShape and frac or 1, 0, 1)
        frame.fill:SetWidth(max(1, fillW))
    end
    if frac > 0 then frame.fill:Show() else frame.fill:Hide() end
    return true
end
local function ClassPowerWidth(bars, frameW, height, segCount, maxWidth)
    local shape = CP_SHAPES[NormalizeClassShape(bars and bars.classPowerShape)]
    local width
    if shape and bars and bars.classPowerWidthMode == "auto_pips" then
        width = AutoFitPips(segCount, height, bars.classPowerGap)
    elseif bars and bars.classPowerWidthMode == "custom" then
        width = tonumber(bars.classPowerWidth)
    else
        width = (tonumber(frameW) or 275) - 4
    end
    width = tonumber(width) or 275
    if width < 20 then width = 20 elseif width > 800 then width = 800 end
    if maxWidth and width > maxWidth then width = maxWidth end
    return floor(width + 0.5)
end
local function SegmentCount(spec)
    local count = floor(tonumber(spec and spec.segments) or 5)
    if count < 1 then count = 1 elseif count > 10 then count = 10 end
    return count
end

--- Compose the class-resource row/pips from profile values and the preview spec.
--- Runtime values are simulated here; the live controller remains authoritative.
local function RenderClassPower(preview, bars, spec)
    local frame = EnsureClassPower(preview)
    local enabled = bars.showClassPower ~= false and spec and spec.enabled ~= false and spec.mode ~= "none"
    if not enabled then
        frame:Hide()
        HideBarOutline(frame)
        HideTableRegions(frame.segments)
        HideTableRegions(frame.bgs)
        HideTableRegions(frame.edges)
        HideTableRegions(frame.runeTexts)
        frame.text:Hide()
        preview.handleClass:Hide()
        preview.handleClassText:Hide()
        return nil
    end
    local h = Clamp(bars.classPowerHeight, 8, 2, 40)
    local count = SegmentCount(spec)
    local w = ClassPowerWidth(bars, preview.playerW, h, count, preview.canvasW - 72)
    local x = 2 + (tonumber(bars.classPowerOffsetX) or 0)
    local y = 4 + (tonumber(bars.classPowerOffsetY) or 0)
    frame:SetSize(w, h)
    frame:ClearAllPoints()
    frame:SetPoint("BOTTOMLEFT", preview.playerRef, "TOPLEFT", x, y)
    frame:Show()
    local shape = NormalizeClassShape(bars.classPowerShape)
    local shapeInfo = CP_SHAPES[shape]
    local token = CPToken(spec)
    local r, g, b = CPBaseColor(spec, bars, 1, 1, 1)
    local bgr, bgg, bgb = CPBgColor(token)
    local bgA = Alpha(bars.classPowerBgAlpha, 0.30)
    local filledA = Alpha(bars.classPowerFilledAlpha, 1)
    local emptyA = Alpha(bars.classPowerEmptyAlpha, 0.30)
    local outline = PreviewOutline(preview, bars.classPowerOutline, shapeInfo and 0 or 1)
    local fgTex = ResolveTexture(bars.classPowerTexture)
    local bgTex = ResolveTexture(bars.classPowerBgTexture, fgTex)
    local gap = shapeInfo and Clamp(bars.classPowerGap, 0, 0, 8) or (Clamp(bars.classPowerTickWidth, 1, 0, 4) + Clamp(bars.classPowerGap, 0, 0, 8))
    if count > 1 then
        local maxGap = floor((w - count) / (count - 1))
        if maxGap < 0 then maxGap = 0 end
        if gap > maxGap then gap = maxGap end
    end
    local slot, startX, rowW
    if shapeInfo then
        slot = min(h, max(1, floor((w - ((count - 1) * gap)) / count)))
        rowW = (slot * count) + ((count - 1) * gap)
        local align = NormalizeAlign(bars.classPowerShapeAlign)
        if align == "LEFT" then startX = 0
        elseif align == "RIGHT" then startX = max(0, floor(w - rowW + 0.5))
        else startX = max(0, floor((w - rowW) * 0.5 + 0.5)) end
        HideBarOutline(frame)
        frame:SetBackdropBorderColor(0, 0, 0, 0)
        frame:SetBackdropColor(0, 0, 0, 0)
    else
        local barSpace = max(count, w - ((count - 1) * gap))
        slot = nil
        startX = 0
        rowW = barSpace
        ApplyBarOutline(frame, outline)
    end
    local xPos, prevBoundary = 0, 0
    local elapsed = PreviewElapsed(preview)
    local animated = AnimationEnabled(preview)
    local animatedValue = animated and CPPreview.AnimatedValue and CPPreview.AnimatedValue(spec, elapsed) or nil
    local runeOrder = spec.mode == "rune" and CPPreview.BuildRuneOrder and CPPreview.BuildRuneOrder({}, bars, spec, elapsed, animated) or nil
    local textColorR, textColorG, textColorB = CPTextColor(1, 1, 1)
    for i = 1, #frame.segments do
        local fill = frame.segments[i]
        local bg = frame.bgs[i]
        local edge = frame.edges[i]
        local runeText = frame.runeTexts[i]
        if i <= count then
            local segW, boundary
            if shapeInfo then
                segW = slot
                boundary = i * slot
            else
                boundary = floor((rowW * i) / count)
                segW = max(1, boundary - prevBoundary)
            end
            local rune = runeOrder and runeOrder[i]
            local frac = rune and ((rune.elapsed or 0) / (rune.total or 1)) or (CPPreview.FillForSegment and CPPreview.FillForSegment(spec, i, animatedValue) or (i <= floor(tonumber(animatedValue or spec.value) or 0) and 1 or 0))
            if frac < 0 then frac = 0 elseif frac > 1 then frac = 1 end
            local sx = startX + xPos
            if bars.classPowerFillReverse == true then sx = w - sx - segW end
            sx = max(0, sx)
            bg:ClearAllPoints()
            bg:SetPoint("TOPLEFT", frame, "TOPLEFT", sx, 0)
            bg:SetSize(segW, h)
            bg:SetTexture(shapeInfo and shapeInfo.bg or bgTex)
            bg:SetVertexColor(bgr or 0, bgg or 0, bgb or 0, bgA)
            bg:Show()
            local sr, sg, sb = r, g, b
            if CPPreview.IsCharged and CPPreview.IsCharged(spec, bars, i) then
                sr, sg, sb = CPColor("CHARGED", 0.60, 0.20, 0.80)
            elseif token == "COMBO_POINTS" and CPPreview.ResolveComboColor then
                sr, sg, sb = CPPreview.ResolveComboColor(bars, i, r, g, b)
            end
            if spec.threshold and frac > 0 and i > spec.threshold and CPPreview.ResolveColor then sr, sg, sb = CPColor(spec.thresholdToken, sr, sg, sb) end
            fill:ClearAllPoints()
            fill:SetTexture(shapeInfo and shapeInfo.fill or fgTex)
            fill:SetVertexColor(sr, sg, sb, rune and filledA or (frac > 0 and filledA or emptyA))
            local drawW = frac > 0 and max(1, floor(segW * frac + 0.5)) or 0
            if bars.classPowerFillReverse == true then
                fill:SetPoint("TOPRIGHT", frame, "TOPLEFT", sx + segW, 0)
                fill:SetPoint("BOTTOMRIGHT", frame, "BOTTOMLEFT", sx + segW, 0)
                fill:SetTexCoord(shapeInfo and (1 - frac) or 0, 1, 0, 1)
            else
                fill:SetPoint("TOPLEFT", frame, "TOPLEFT", sx, 0)
                fill:SetPoint("BOTTOMLEFT", frame, "BOTTOMLEFT", sx, 0)
                fill:SetTexCoord(0, shapeInfo and frac or 1, 0, 1)
            end
            fill:SetWidth(max(1, drawW))
            fill._msufCPPreviewSegW = segW
            fill._msufCPPreviewShape = shapeInfo ~= nil
            fill._msufCPPreviewReverse = bars.classPowerFillReverse == true
            if drawW > 0 then fill:Show() else fill:Hide() end
            if shapeInfo and outline > 0 then
                edge:ClearAllPoints()
                edge:SetPoint("TOPLEFT", frame, "TOPLEFT", sx, 0)
                edge:SetSize(segW, h)
                edge:SetTexture(shapeInfo.edge)
                edge:SetVertexColor(PREVIEW_BORDER_COLOR[1], PREVIEW_BORDER_COLOR[2], PREVIEW_BORDER_COLOR[3], ShapeOutlineAlpha(outline))
                edge:Show()
            else
                edge:Hide()
            end
            if runeText then
                if rune and bars.runeShowTime ~= false and not rune.ready then
                    local txt = CPPreview.FormatSeconds and CPPreview.FormatSeconds(rune.remaining) or ""
                    ApplyFont(runeText, Clamp((tonumber(bars.classPowerFontSize) or 16) - 2, 12, 6, 48))
                    runeText:SetText(txt)
                    runeText:SetTextColor(textColorR, textColorG, textColorB, 1)
                    runeText:ClearAllPoints()
                    runeText:SetPoint("CENTER", frame, "TOPLEFT", sx + floor(segW * 0.5 + 0.5), -floor(h * 0.5 + 0.5))
                    if txt ~= "" then runeText:Show() else runeText:Hide() end
                else
                    runeText:Hide()
                end
            end
            xPos = xPos + segW + gap
            prevBoundary = boundary
        else
            fill:Hide()
            bg:Hide()
            edge:Hide()
            if runeText then runeText:Hide() end
        end
    end
    frame._msufCPPreviewAnim = {
        bars = bars,
        spec = spec,
        count = count,
        token = token,
        r = r,
        g = g,
        b = b,
        filledA = filledA,
        emptyA = emptyA,
        textColorR = textColorR,
        textColorG = textColorG,
        textColorB = textColorB,
    }
    if bars.classPowerShowText == true then
        local textSize = Clamp(bars.classPowerFontSize, 16, 6, 48)
        ApplyFont(frame.text, textSize)
        frame.text:SetText(CPPreview.TextForValue and CPPreview.TextForValue(spec, animatedValue) or tostring(spec.previewText or "3"))
        frame.text:SetTextColor(textColorR, textColorG, textColorB, 1)
        frame.text:ClearAllPoints()
        frame.text:SetPoint("CENTER", frame, "CENTER", tonumber(bars.classPowerTextOffsetX) or 0, tonumber(bars.classPowerTextOffsetY) or 0)
        frame.text:Show()
        PlaceTextHandle(preview.handleClassText, PreviewParent(preview), { frame.text })
    else
        frame.text:Hide()
        preview.handleClassText:Hide()
    end
    PlaceHandle(preview.handleClass, frame, 5)
    return frame
end
local function DetachedPowerShown(player)
    return player.powerBarDetached == true and player.detachedPowerBarAnchorToClassPower == true
end
local function DetachedPowerWidth(preview, bars, player, classFrame)
    local shape = ResolvePowerShape(player.detachedPowerBarShape or "FOLLOW_CLASS", bars.classPowerShape)
    if shape == "ORB" then return Clamp(player.detachedPowerOrbSize, 54, 20, 160), shape end
    if player.detachedPowerBarSyncClassPower ~= false and classFrame and classFrame.GetWidth then return max(20, floor(classFrame:GetWidth() + 0.5)), shape end
    local widthMode = bars.detachedPowerBarWidthMode
    if widthMode and widthMode ~= "manual" and classFrame and classFrame.GetWidth then return max(20, floor(classFrame:GetWidth() + 0.5)), shape end
    return Clamp(player.detachedPowerBarWidth, preview.playerW, 20, 800), shape
end
local function ApplyMeterText(frame, size, x, y, leftText, centerText, rightText)
    ApplyFont(frame.left, size)
    ApplyFont(frame.center, size)
    ApplyFont(frame.right, size)
    frame.left:SetText(leftText or "")
    frame.center:SetText(centerText or "")
    frame.right:SetText(rightText or "")
    frame.left:SetTextColor(1, 1, 1, 1)
    frame.center:SetTextColor(1, 1, 1, 1)
    frame.right:SetTextColor(1, 1, 1, 1)
    local h = frame:GetHeight() or 8
    local textH = max(14, h + 8)
    frame.left:ClearAllPoints()
    frame.left:SetPoint("LEFT", frame, "LEFT", 4 + (x or 0), y or 0)
    frame.left:SetSize(max(20, (frame:GetWidth() or 100) * 0.34), textH)
    frame.center:ClearAllPoints()
    frame.center:SetPoint("CENTER", frame, "CENTER", x or 0, y or 0)
    frame.center:SetSize(max(20, frame:GetWidth() or 100), textH)
    frame.right:ClearAllPoints()
    frame.right:SetPoint("RIGHT", frame, "RIGHT", -4 + (x or 0), y or 0)
    frame.right:SetSize(max(20, (frame:GetWidth() or 100) * 0.34), textH)
    if (leftText or "") ~= "" then frame.left:Show() else frame.left:Hide() end
    if (centerText or "") ~= "" then frame.center:Show() else frame.center:Hide() end
    if (rightText or "") ~= "" then frame.right:Show() else frame.right:Hide() end
end

--- Detached power preview follows the same anchoring relationship as runtime:
--- it can attach to ClassPower, but no live player power events are involved.
local function RenderDetachedPower(preview, bars, player, classFrame)
    local frame = EnsureMeter(preview, "detachedPower")
    if not DetachedPowerShown(player) then
        frame:Hide()
        HideBarOutline(frame)
        preview.handlePower:Hide()
        preview.handlePowerText:Hide()
        return nil
    end
    local width, shape = DetachedPowerWidth(preview, bars, player, classFrame)
    local shapeInfo = POWER_SHAPES[shape]
    local height = shape == "ORB" and width or Clamp(player.detachedPowerBarHeight, 6, 2, 80)
    local x, y = tonumber(player.detachedPowerBarOffsetX) or 0, tonumber(player.detachedPowerBarOffsetY) or -4
    local pr, pg, pb = PowerColor()
    local fgTex = ResolveTexture(bars.detachedPowerBarTexture)
    local bgTex = ResolveTexture(bars.detachedPowerBarBgTexture, fgTex)
    local outline = PreviewOutline(preview, bars.detachedPowerBarOutline, 1)
    local fraction = AnimatedMeterFraction(preview, 0.72, 0.46, 0.08, 0.96)
    frame:ClearAllPoints()
    if classFrame and classFrame.IsShown and classFrame:IsShown() then
        frame:SetPoint("TOP", classFrame, "BOTTOM", x, y)
    else
        frame:SetPoint("TOP", preview.playerRef, "BOTTOM", x, y)
    end
    RenderMeter(frame, shapeInfo, {
        width = width,
        height = height,
        fraction = fraction,
        r = pr,
        g = pg,
        b = pb,
        bgR = pr,
        bgG = pg,
        bgB = pb,
        bgA = 0.28,
        texture = fgTex,
        bgTexture = bgTex,
        outline = outline,
    })
    frame:Show()
    if player.showPower ~= false and player.detachedPowerBarTextOnBar == true then
        local leftMode = tostring(player.powerTextLeft or "NONE"):upper()
        local centerMode = tostring(player.powerTextCenter or player.powerTextMode or "CURPERCENT"):upper()
        local rightMode = tostring(player.powerTextRight or "NONE"):upper()
        local delimiter = player.powerTextSeparator or player.hpTextSeparator or ""
        local current = floor((fraction * 100) + 0.5)
        ApplyMeterText(frame, Clamp(player.powerFontSize, 14, 6, 48), tonumber(player.powerOffsetX) or -4, tonumber(player.powerOffsetY) or 4,
            ModeText(leftMode, current, 100, delimiter),
            ModeText(centerMode, current, 100, delimiter),
            ModeText(rightMode, current, 100, delimiter))
        PlaceTextHandle(preview.handlePowerText, PreviewParent(preview), { frame.left, frame.center, frame.right })
    else
        frame.left:Hide()
        frame.center:Hide()
        frame.right:Hide()
        preview.handlePowerText:Hide()
    end
    PlaceHandle(preview.handlePower, frame, 5)
    return frame
end
local function HPWidth(preview, bars, classFrame, powerFrame)
    local mode = tostring(bars.playerHPBarWidthMode or "class"):lower()
    local width
    if mode == "custom" then
        width = tonumber(bars.playerHPBarWidth)
    elseif mode == "power" then
        width = powerFrame and powerFrame.GetWidth and powerFrame:GetWidth()
    elseif mode == "player" then
        width = preview.playerW
    else
        width = classFrame and classFrame.GetWidth and classFrame:GetWidth()
    end
    width = tonumber(width) or preview.playerW
    if width < 20 then width = 20 elseif width > 1200 then width = 1200 end
    return floor(width + 0.5)
end
local function PlaceHP(frame, preview, bars, classFrame, powerFrame)
    local mode = tostring(bars.playerHPBarAnchor or "CLASS_TOP"):upper()
    local anchor = (mode == "POWER_TOP" or mode == "POWER_BOTTOM") and powerFrame or classFrame
    if not (anchor and anchor.IsShown and anchor:IsShown()) then anchor = classFrame or preview.playerRef end
    local x = tonumber(bars.playerHPBarOffsetX) or 0
    local y = tonumber(bars.playerHPBarOffsetY) or 0
    local gap = Clamp(bars.playerHPBarGap, 2, 0, 60)
    frame:ClearAllPoints()
    if mode == "CLASS_BOTTOM" or mode == "POWER_BOTTOM" then
        frame:SetPoint("TOP", anchor, "BOTTOM", x, y - gap)
    else
        frame:SetPoint("BOTTOM", anchor, "TOP", x, y + gap)
    end
end
local function HPTextConfig(bars, player)
    local left, center, right, delimiter, reverse
    if bars.playerHPBarUsePlayerText ~= false then
        left = tostring(player.textLeft or "NONE"):upper()
        center = tostring(player.textCenter or "NONE"):upper()
        right = tostring(player.textRight or player.hpTextMode or "CURPERCENT"):upper()
        delimiter = player.hpTextSeparator or ""
        reverse = player.hpTextReverse == true
    else
        left = tostring(bars.playerHPBarTextLeft or "NONE"):upper()
        center = tostring(bars.playerHPBarTextCenter or "NONE"):upper()
        right = tostring(bars.playerHPBarTextRight or "CURPERCENT"):upper()
        delimiter = bars.playerHPBarTextSeparator or ""
        reverse = bars.playerHPBarTextReverse == true
    end
    if reverse then
        left, right = HP_TEXT_REVERSE[right] or right, HP_TEXT_REVERSE[left] or left
        center = HP_TEXT_REVERSE[center] or center
    end
    return left, center, right, delimiter
end

--- Optional ClassPower-owned player HP preview. It mirrors runtime layout/text
--- rules without reading real UnitHealth.
local function RenderPlayerHP(preview, bars, player, classFrame, powerFrame, spec)
    local frame = EnsureMeter(preview, "playerHP")
    if bars.playerHPBarEnabled ~= true then
        frame:Hide()
        HideBarOutline(frame)
        preview.handleHP:Hide()
        preview.handleHPText:Hide()
        return nil
    end
    local shape = ResolveHPShape(bars, player)
    local shapeInfo = POWER_SHAPES[shape]
    local followPower = tostring(bars.playerHPBarShape or "BAR"):upper() == "FOLLOW_POWER"
    local orbSize = followPower and Clamp(player.detachedPowerOrbSize, 54, 20, 160) or Clamp(bars.playerHPBarOrbSize, 54, 20, 160)
    local width = shape == "ORB" and orbSize or HPWidth(preview, bars, classFrame, powerFrame)
    local height = shape == "ORB" and width or Clamp(bars.playerHPBarHeight, 6, 2, 80)
    local hr, hg, hb = HPColor(bars, spec)
    local fgTex = ResolveTexture(bars.playerHPBarTexture)
    local bgTex = ResolveTexture(bars.playerHPBarBgTexture, fgTex)
    local fraction = AnimatedMeterFraction(preview, 0.74, 0.34, 0.18, 1.00)
    PlaceHP(frame, preview, bars, classFrame, powerFrame)
    RenderMeter(frame, shapeInfo, {
        width = width,
        height = height,
        fraction = fraction,
        r = hr,
        g = hg,
        b = hb,
        bgR = 0,
        bgG = 0,
        bgB = 0,
        bgA = Alpha(bars.playerHPBarBgAlpha, 0.35),
        texture = fgTex,
        bgTexture = bgTex,
        outline = PreviewOutline(preview, bars.playerHPBarOutline, 1),
    })
    frame:Show()
    if bars.playerHPBarTextEnabled ~= false then
        local leftMode, centerMode, rightMode, delimiter = HPTextConfig(bars, player)
        local maxValue = 1000000
        local current = floor((maxValue * fraction) + 0.5)
        ApplyMeterText(frame, Clamp(bars.playerHPBarUsePlayerText ~= false and player.hpFontSize or bars.playerHPBarTextSize, 14, 6, 48), tonumber(bars.playerHPBarTextOffsetX) or 0, tonumber(bars.playerHPBarTextOffsetY) or 0,
            ModeText(leftMode, current, maxValue, delimiter),
            ModeText(centerMode, current, maxValue, delimiter),
            ModeText(rightMode, current, maxValue, delimiter))
        PlaceTextHandle(preview.handleHPText, PreviewParent(preview), { frame.left, frame.center, frame.right })
    else
        frame.left:Hide()
        frame.center:Hide()
        frame.right:Hide()
        preview.handleHPText:Hide()
    end
    PlaceHandle(preview.handleHP, frame, 5)
    return frame
end
local function UpdateClassPowerAnimation(preview, frame)
    local state = frame and frame._msufCPPreviewAnim
    local bars = state and state.bars
    local spec = state and state.spec
    if not (preview and frame and bars and spec) then return false end
    if frame.IsShown and not frame:IsShown() then return true end
    local elapsed = PreviewElapsed(preview)
    local animatedValue = CPPreview.AnimatedValue and CPPreview.AnimatedValue(spec, elapsed) or nil
    local runeOrder = spec.mode == "rune" and CPPreview.BuildRuneOrder and CPPreview.BuildRuneOrder({}, bars, spec, elapsed, true) or nil
    for i = 1, state.count or 0 do
        local fill = frame.segments and frame.segments[i]
        if fill then
            local rune = runeOrder and runeOrder[i]
            local frac = rune and ((rune.elapsed or 0) / (rune.total or 1))
                or (CPPreview.FillForSegment and CPPreview.FillForSegment(spec, i, animatedValue)
                    or (i <= floor(tonumber(animatedValue or spec.value) or 0) and 1 or 0))
            if frac < 0 then frac = 0 elseif frac > 1 then frac = 1 end
            local sr, sg, sb = state.r, state.g, state.b
            if CPPreview.IsCharged and CPPreview.IsCharged(spec, bars, i) then
                sr, sg, sb = CPColor("CHARGED", 0.60, 0.20, 0.80)
            elseif state.token == "COMBO_POINTS" and CPPreview.ResolveComboColor then
                sr, sg, sb = CPPreview.ResolveComboColor(bars, i, sr, sg, sb)
            end
            if spec.threshold and frac > 0 and i > spec.threshold and CPPreview.ResolveColor then
                sr, sg, sb = CPColor(spec.thresholdToken, sr, sg, sb)
            end
            fill:SetVertexColor(sr, sg, sb, rune and state.filledA or (frac > 0 and state.filledA or state.emptyA))
            local segW = max(1, floor(tonumber(fill._msufCPPreviewSegW) or 1))
            local drawW = frac > 0 and max(1, floor(segW * frac + 0.5)) or 0
            if fill._msufCPPreviewReverse then
                fill:SetTexCoord(fill._msufCPPreviewShape and (1 - frac) or 0, 1, 0, 1)
            else
                fill:SetTexCoord(0, fill._msufCPPreviewShape and frac or 1, 0, 1)
            end
            fill:SetWidth(max(1, drawW))
            if drawW > 0 then fill:Show() else fill:Hide() end
            local runeText = frame.runeTexts and frame.runeTexts[i]
            if runeText then
                if rune and bars.runeShowTime ~= false and not rune.ready then
                    local txt = CPPreview.FormatSeconds and CPPreview.FormatSeconds(rune.remaining) or ""
                    runeText:SetText(txt)
                    if txt ~= "" then runeText:Show() else runeText:Hide() end
                else
                    runeText:Hide()
                end
            end
        end
    end
    if frame.text and bars.classPowerShowText == true then
        frame.text:SetText(CPPreview.TextForValue and CPPreview.TextForValue(spec, animatedValue) or tostring(spec.previewText or "3"))
        if LayerOn(preview, "classText") then frame.text:Show() end
    end
    return true
end
local function UpdateDetachedPowerAnimation(preview, frame, bars, player)
    if not (preview and frame and bars and player) then return false end
    if frame.IsShown and not frame:IsShown() then return true end
    local fraction = AnimatedMeterFraction(preview, 0.72, 0.46, 0.08, 0.96)
    UpdateMeterFill(frame, fraction)
    if player.showPower ~= false and player.detachedPowerBarTextOnBar == true then
        local leftMode = tostring(player.powerTextLeft or "NONE"):upper()
        local centerMode = tostring(player.powerTextCenter or player.powerTextMode or "CURPERCENT"):upper()
        local rightMode = tostring(player.powerTextRight or "NONE"):upper()
        local delimiter = player.powerTextSeparator or player.hpTextSeparator or ""
        local current = floor((fraction * 100) + 0.5)
        if frame.left then frame.left:SetText(ModeText(leftMode, current, 100, delimiter)) end
        if frame.center then frame.center:SetText(ModeText(centerMode, current, 100, delimiter)) end
        if frame.right then frame.right:SetText(ModeText(rightMode, current, 100, delimiter)) end
    end
    return true
end
local function UpdatePlayerHPAnimation(preview, frame, bars, player)
    if not (preview and frame and bars and player) then return false end
    if frame.IsShown and not frame:IsShown() then return true end
    local fraction = AnimatedMeterFraction(preview, 0.74, 0.34, 0.18, 1.00)
    UpdateMeterFill(frame, fraction)
    if bars.playerHPBarTextEnabled ~= false then
        local leftMode, centerMode, rightMode, delimiter = HPTextConfig(bars, player)
        local maxValue = 1000000
        local current = floor((maxValue * fraction) + 0.5)
        if frame.left then frame.left:SetText(ModeText(leftMode, current, maxValue, delimiter)) end
        if frame.center then frame.center:SetText(ModeText(centerMode, current, maxValue, delimiter)) end
        if frame.right then frame.right:SetText(ModeText(rightMode, current, maxValue, delimiter)) end
    end
    return true
end
local function RefreshClassPowerAnimation(preview)
    local state = preview and preview._msufCPPreviewAnim
    if not state then return false end
    if state.classFrame and not UpdateClassPowerAnimation(preview, state.classFrame) then return false end
    if state.powerFrame and not UpdateDetachedPowerAnimation(preview, state.powerFrame, state.bars, state.player) then return false end
    if state.hpFrame and not UpdatePlayerHPAnimation(preview, state.hpFrame, state.bars, state.player) then return false end
    return true
end
local function PaintPlayerReference(preview, spec)
    local player = preview.playerRef
    local parent = PreviewParent(preview)
    local pr, pg, pb = PowerColor()
    local hr, hg, hb = ClassColor(0.20, 0.78, 0.26, spec)
    player:SetSize(preview.playerW, preview.playerH)
    player:ClearAllPoints()
    player:SetPoint("CENTER", parent, "CENTER", 0, -34)
    player.health:SetColorTexture(hr, hg, hb, 0.16)
    player.power:SetColorTexture(pr, pg, pb, 0.16)
    player.outline:SetBackdropBorderColor(0.55, 0.62, 0.78, 0.34)
end
local function CreatePlayerReference(preview)
    local player = CreateFrame("Frame", nil, PreviewParent(preview))
    player.health = player:CreateTexture(nil, "BACKGROUND")
    player.health:SetPoint("TOPLEFT", player, "TOPLEFT", 0, 0)
    player.health:SetPoint("BOTTOMRIGHT", player, "BOTTOMRIGHT", 0, 6)
    player.power = player:CreateTexture(nil, "BACKGROUND")
    player.power:SetPoint("TOPLEFT", player.health, "BOTTOMLEFT", 0, 0)
    player.power:SetPoint("BOTTOMRIGHT", player, "BOTTOMRIGHT", 0, 0)
    player.outline = CreateFrame("Frame", nil, player, "BackdropTemplate")
    player.outline:SetAllPoints()
    player.outline:SetBackdrop({ bgFile = WHITE8, edgeFile = WHITE8, edgeSize = 1 })
    player.outline:SetBackdropColor(0, 0, 0, 0)
    player.name = MakeText(player, "OVERLAY", "LEFT")
    ApplyFont(player.name, 11)
    player.name:SetPoint("LEFT", player, "LEFT", 6, 0)
    player.name:SetText(TR("Player frame reference"))
    player.name:SetTextColor(0.60, 0.66, 0.78, 0.62)
    preview.playerRef = player
end
local function EnsureBound(preview, key, label, color)
    preview.bounds = preview.bounds or {}
    local frame = preview.bounds[key]
    if frame then return frame end
    frame = CreateFrame("Frame", nil, PreviewParent(preview), "BackdropTemplate")
    frame:SetBackdrop({ bgFile = WHITE8, edgeFile = WHITE8, edgeSize = 1 })
    frame:SetBackdropColor(0, 0, 0, 0)
    frame:SetBackdropBorderColor(color[1], color[2], color[3], 0.90)
    frame:EnableMouse(false)
    frame:SetFrameLevel(((PreviewParent(preview) and PreviewParent(preview).GetFrameLevel and PreviewParent(preview):GetFrameLevel()) or 0) + 70)
    frame.label = MakeText(frame, "OVERLAY", "LEFT")
    ApplyFont(frame.label, 9)
    frame.label:SetText(TR(label))
    frame.label:SetTextColor(color[1], color[2], color[3], 0.95)
    frame.label:SetPoint("BOTTOMLEFT", frame, "TOPLEFT", 1, 1)
    frame._msufPlaced = false
    frame._layerKey = key
    frame:Hide()
    preview.bounds[key] = frame
    return frame
end
local function PlaceBound(preview, key, region, label, color, pad)
    local bound = EnsureBound(preview, key, label, color)
    if not (region and region.IsShown and region:IsShown()) then
        bound._msufPlaced = false
        bound:Hide()
        return
    end
    pad = tonumber(pad) or 1
    bound:ClearAllPoints()
    bound:SetPoint("TOPLEFT", region, "TOPLEFT", -pad, pad)
    bound:SetPoint("BOTTOMRIGHT", region, "BOTTOMRIGHT", pad, -pad)
    bound._msufPlaced = true
    bound:Show()
end
local function RefreshBounds(preview, classFrame, powerFrame, hpFrame)
    PlaceBound(preview, "reference", preview.playerRef, "Reference", { 0.60, 0.66, 0.78 }, 1)
    PlaceBound(preview, "class", classFrame, "Class", { 0.30, 0.78, 0.55 }, 1)
    PlaceBound(preview, "power", powerFrame, "Power", { 0.95, 0.72, 0.18 }, 1)
    PlaceBound(preview, "hp", hpFrame, "HP", { 0.25, 0.90, 0.42 }, 1)
end
local function ApplyPreviewZoom(preview)
    if not (preview and preview.stage) then return end
    local scale = tonumber(preview._manualZoom) or 1
    if ZoomPan.Clamp then scale = ZoomPan.Clamp(scale) end
    preview._mockAutoScale = 1
    preview._mockScale = scale
    preview._mockEffectiveScale = scale
    if preview.stage.SetScale then preview.stage:SetScale(scale) end
    if ZoomPan.UpdateControls then ZoomPan.UpdateControls(preview) end
    if ZoomPan.ApplyPan then
        ZoomPan.ApplyPan(preview)
    else
        preview.stage:ClearAllPoints()
        preview.stage:SetPoint("CENTER", preview.canvas, "CENTER", tonumber(preview._zoomPanX) or 0, tonumber(preview._zoomPanY) or 0)
    end
end
local function ApplyPreviewBorder(preview)
    if not (preview and preview.canvas and preview.canvas.SetBackdropBorderColor) then return end
    local c = preview._canvasBorderColor or { 0.10, 0.13, 0.18, 0.65 }
    preview.canvas:SetBackdropBorderColor(c[1], c[2], c[3], c[4] or 1)
end
local function HideMeterText(frame)
    if not frame then return end
    SetShownSafe(frame.left, false)
    SetShownSafe(frame.center, false)
    SetShownSafe(frame.right, false)
end
local function ApplyLayerVisibility(preview)
    if not preview then return end
    local classOn = LayerOn(preview, "class")
    local classTextOn = classOn and LayerOn(preview, "classText")
    local powerOn = LayerOn(preview, "power")
    local powerTextOn = powerOn and LayerOn(preview, "powerText")
    local hpOn = LayerOn(preview, "hp")
    local hpTextOn = hpOn and LayerOn(preview, "hpText")
    local boundsOn = LayerOn(preview, "bounds")
    local guidesOn = GuidesOn(preview)
    SetShownSafe(preview.playerRef, LayerOn(preview, "reference"))
    SetShownSafe(preview.classPower, classOn)
    if not classOn then HideBarOutline(preview.classPower) end
    if preview.classPower and preview.classPower.text then SetShownSafe(preview.classPower.text, classTextOn) end
    SetShownSafe(preview.detachedPower, powerOn)
    if not powerOn then HideBarOutline(preview.detachedPower) end
    if not powerTextOn then HideMeterText(preview.detachedPower) end
    SetShownSafe(preview.playerHP, hpOn)
    if not hpOn then HideBarOutline(preview.playerHP) end
    if not hpTextOn then HideMeterText(preview.playerHP) end
    if preview.bounds then
        for _, bound in pairs(preview.bounds) do
            SetShownSafe(bound, boundsOn and bound._msufPlaced == true and LayerOn(preview, bound._layerKey))
        end
    end
    for i = 1, #(preview.handles or {}) do
        local handle = preview.handles[i]
        SetShownSafe(handle, guidesOn and handle._msufPlaced == true and LayerOn(preview, handle._layerKey or handle._key))
    end
    if preview.selectedHandle and not CanNudgeHandle(preview.selectedHandle) then
        preview.selectedHandle = nil
        SetArrowBindings(preview, false)
        FocusPreviewKeyboardTarget(preview, nil, false)
    end
    ApplyPreviewBorder(preview)
end
local function LayerAvailable(preview, key)
    local available = preview and preview.layerAvailable
    return not (available and available[key] == false)
end
local CP_LAYER_BUTTON_OPTS = {
    Tr = TR,
    IsAvailable = LayerAvailable,
    IsOn = LayerOn,
    disabledLine = "This element is disabled in the current settings.",
    OnClick = function(self, preview)
        if not LayerAvailable(preview, self.key) then return end
        preview.layerVisibility[self.key] = preview.layerVisibility[self.key] == false
        if self.key == "guides" then SetPreviewGuidesEnabled(preview.layerVisibility[self.key] ~= false) end
        if preview and preview.Refresh then
            RequestClassPowerPreviewRefresh(preview, "CLASSPOWER_PREVIEW_LAYER")
        else
            ApplyLayerVisibility(preview)
            RefreshHandleVisuals(preview)
            RefreshLayerButtons(preview)
        end
    end,
}
local function CreateLayerSidebar(box, sideW)
    local sidebar = T.Panel(box, nil, { 0.025, 0.028, 0.04, 0.82 }, T.colors.borderSoft)
    sidebar:SetPoint("TOPLEFT", box.canvas, "TOPRIGHT", 6, 0)
    sidebar:SetPoint("BOTTOMRIGHT", box, "BOTTOMRIGHT", -12, 12)
    box.sidebar = sidebar
    local hdr = T.Font(sidebar, "GameFontDisableSmall", TR("LAYERS"), { 0.45, 0.50, 0.62, 0.8 })
    hdr:SetPoint("TOP", sidebar, "TOP", 0, -5)
    box.layerVisibility = {}
    box.layerButtons = {}
    for i = 1, #CP_PREVIEW_LAYERS do
        local def = CP_PREVIEW_LAYERS[i]
        box.layerVisibility[def.key] = (def.key == "guides") and PreviewGuidesEnabled() or true
        box.layerButtons[#box.layerButtons + 1] = Helpers.CreateLayerButton(sidebar, box, def, i, sideW, CP_LAYER_BUTTON_OPTS)
    end
end
local function RefreshAnimateButton(preview)
    local btn = preview and preview.animateButton
    if not btn then return end
    local active = AnimationEnabled(preview)
    if btn.fs then
        btn.fs:SetText(active and TR("Stop") or TR("Animate"))
        btn.fs:SetTextColor(active and 0.06 or 0.78, active and 0.95 or 0.84, active and 1.00 or 0.96, 1)
    end
    if btn.SetBackdropColor then
        if active then
            btn:SetBackdropColor(0.020, 0.125, 0.155, 0.96)
            btn:SetBackdropBorderColor(0.10, 0.82, 0.95, 1)
        else
            btn:SetBackdropColor(0.025, 0.030, 0.045, 0.88)
            btn:SetBackdropBorderColor(0.12, 0.16, 0.24, 0.92)
        end
    end
end
local function StopAnimationDriver(preview)
    local driver = preview and preview.animationDriver
    if not driver then return end
    driver:SetScript("OnUpdate", nil)
    if driver.SetOnUpdateMode then driver:SetOnUpdateMode("Disabled") end
    driver:Hide()
end
local function AnimationOnUpdate(driver, elapsed)
    local preview = driver and driver._preview
    if not (preview and preview._animationEnabled == true and preview.IsShown and preview:IsShown()) then
        StopAnimationDriver(preview)
        return
    end
    elapsed = tonumber(elapsed) or 0
    preview._animationElapsed = (tonumber(preview._animationElapsed) or 0) + elapsed
    preview._animationAccum = (tonumber(preview._animationAccum) or 0) + elapsed
    if preview._animationAccum < CP_PREVIEW_ANIMATION_INTERVAL then return end
    preview._animationAccum = 0
    if preview.Refresh then
        local profiling = M.PerfProfile and M.PerfProfile.enabled == true and M.ProfileStart and M.ProfileStop
        local started = profiling and M.ProfileStart() or nil
        local light = preview.RefreshAnimation and preview:RefreshAnimation("CLASSPOWER_PREVIEW_ANIMATE")
        if not light then preview:Refresh("CLASSPOWER_PREVIEW_ANIMATE") end
        if profiling then M.ProfileStop("preview", light and "ClassPowerPreview.AnimationLight" or "ClassPowerPreview.AnimationFallback", started) end
    end
end
local function StartAnimationDriver(preview)
    if not (preview and preview._animationEnabled == true) then return end
    if not preview.animationDriver then
        preview.animationDriver = CreateFrame("Frame", nil, preview.canvas or preview)
        preview.animationDriver._preview = preview
    end
    preview.animationDriver._preview = preview
    if preview.animationDriver.SetOnUpdateMode then preview.animationDriver:SetOnUpdateMode("RunWhenVisible") end
    preview.animationDriver:SetScript("OnUpdate", AnimationOnUpdate)
    preview.animationDriver:Show()
end
local function SetAnimationEnabled(preview, enabled)
    if not preview then return end
    enabled = enabled == true
    if enabled and preview._animationEnabled ~= true then
        preview._animationElapsed = 0
        preview._animationAccum = 0
    end
    preview._animationEnabled = enabled
    General().classPowerPreviewAnimate = enabled
    RefreshAnimateButton(preview)
    if enabled then
        StartAnimationDriver(preview)
    else
        StopAnimationDriver(preview)
    end
    if preview.Refresh then preview:Refresh("CLASSPOWER_PREVIEW_ANIMATE_TOGGLE") end
end
local function CreateAnimateButton(preview)
    local btn = CreateFrame("Button", nil, preview.canvas, "BackdropTemplate")
    btn:SetSize(72, 22)
    btn:SetBackdrop({ bgFile = WHITE8, edgeFile = WHITE8, edgeSize = 1 })
    if preview.zoomBar then
        btn:SetPoint("RIGHT", preview.zoomBar, "LEFT", -6, 0)
    else
        btn:SetPoint("TOPRIGHT", preview.canvas, "TOPRIGHT", -174, -6)
    end
    btn.fs = btn:CreateFontString(nil, "OVERLAY", "GameFontDisableSmall")
    btn.fs:SetPoint("CENTER")
    btn:SetScript("OnClick", function(self)
        SetAnimationEnabled(self._preview, not AnimationEnabled(self._preview))
    end)
    btn:SetScript("OnEnter", function(self)
        if self.SetBackdropColor and not AnimationEnabled(self._preview) then
            self:SetBackdropColor(0.05, 0.07, 0.11, 0.98)
            self:SetBackdropBorderColor(0.28, 0.42, 0.68, 1)
        end
    end)
    btn:SetScript("OnLeave", function(self)
        RefreshAnimateButton(self._preview)
    end)
    M.AddTooltip(btn, "Animate Preview", "Animates Class Resource, Player Power, and HP fill values in this preview only.", { hook = true })
    btn._preview = preview
    preview.animateButton = btn
    RefreshAnimateButton(preview)
    return btn
end
local function DragUpdate(frame)
    local handle = frame and frame._handle
    if not (handle and handle._dragging) then return end
    if IsMouseButtonDown and not IsMouseButtonDown("LeftButton") then
        StopHandleDrag(handle, "LeftButton", false)
        return
    end
    local cx, cy = GetCursorPosition()
    if not (cx and cy) then return end
    local scale = handle.GetEffectiveScale and handle:GetEffectiveScale() or 1
    if scale <= 0 then scale = 1 end
    local nextX = Round((handle._startX or 0) + ((cx - (handle._cursorX or cx)) / scale))
    local nextY = Round((handle._startY or 0) + ((cy - (handle._cursorY or cy)) / scale))
    if handle._lastX == nextX and handle._lastY == nextY then return end
    handle._lastX, handle._lastY = nextX, nextY
    WriteHandle(handle, nextX, nextY, true)
end

--- Build the inline/pinnable ClassPower preview section and install its refresh
--- function. All live apply calls are opt-in through handle actions.
function Preview.Create(ctx, builder)
    if not (W and T and builder and builder.Section) then return nil end
    local section = builder:Section("Preview", 388)
    local width = section._msuf2Width or builder.width or ctx.width or 720
    local innerW = max(470, width - 28)
    local sideW = 80
    local box = T.Panel(section, nil, { 0.018, 0.022, 0.044, 0.88 }, T.colors.borderSoft)
    box:SetPoint("TOPLEFT", section, "TOPLEFT", 14, -38)
    box:SetSize(innerW, 330)
    box.canvasW, box.canvasH = max(340, innerW - sideW - 38), 260
    box.playerW, box.playerH = min(275, max(190, box.canvasW - 160)), 38
    box.handles = {}
    if box.EnableKeyboard then box:EnableKeyboard(true) end
    if box.SetPropagateKeyboardInput then box:SetPropagateKeyboardInput(true) end
    box:SetScript("OnKeyDown", HandleKeyDown)
    local title = T.Font(box, "GameFontNormal", TR("Class Resources Preview"), T.colors.accent)
    title:SetPoint("TOPLEFT", box, "TOPLEFT", 12, -10)
    local hint = T.Font(box, "GameFontDisableSmall", TR("drag CP / Power / HP handles - arrows nudge selected - Ctrl+wheel zoom - right drag pans"), T.colors.muted)
    hint:SetPoint("LEFT", title, "RIGHT", 14, 0)
    hint:SetPoint("RIGHT", box, "RIGHT", -12, 0)
    hint:SetJustifyH("LEFT")
    box.hint = hint
    box.summary = T.Font(box, "GameFontDisableSmall", "", T.colors.muted)
    box.summary:SetPoint("TOPLEFT", box, "TOPLEFT", 12, -30)
    box.summary:SetPoint("RIGHT", box, "RIGHT", -12, 0)
    box.summary:SetJustifyH("LEFT")
    box.canvas = T.Panel(box, nil, { 0, 0, 0, 1 }, T.colors.borderSoft)
    box.canvas:SetPoint("TOPLEFT", box, "TOPLEFT", 12, -54)
    box.canvas:SetSize(box.canvasW, box.canvasH)
    box._canvasBorderColor = T.colors.borderSoft
    if box.canvas.SetClipsChildren then box.canvas:SetClipsChildren(true) end
    box.canvas:EnableMouse(true)
    box.canvas:EnableMouseWheel(true)
    if box.canvas.SetPropagateMouseWheel then box.canvas:SetPropagateMouseWheel(true) end
    box.stage = CreateFrame("Frame", nil, box.canvas)
    box.stage:SetSize(box.canvasW, box.canvasH)
    box.stage:SetPoint("CENTER", box.canvas, "CENTER", 0, 0)
    box.mock = box.stage
    if ZoomPan.Configure then ZoomPan.Configure({ TR = TR, WHITE8 = WHITE8 }) end
    if Helpers.BuildZoomBar then
        Helpers.BuildZoomBar(box, box.canvas, {
            texture = WHITE8,
            CreateZoomButton = ZoomPan.CreateButton,
            Tr = TR,
            StepZoom = ZoomPan.Step,
            SetZoom = ZoomPan.SetZoom,
            StartPan = ZoomPan.Start,
            StopPan = ZoomPan.Stop,
            fitReason = "CLASSPOWER_PREVIEW_ZOOM_FIT",
            oneReason = "CLASSPOWER_PREVIEW_ZOOM_1TO1",
        })
    end
    box._animationEnabled = General().classPowerPreviewAnimate == true
    CreateAnimateButton(box)
    box.canvas:SetScript("OnMouseDown", function(self, button)
        if ZoomPan.Start and ZoomPan.Start(self, box, button) then return end
        box.selectedHandle = nil
        SetArrowBindings(box, false)
        FocusPreviewKeyboardTarget(box, nil, false)
        RefreshHandleVisuals(box)
    end)
    box.canvas:SetScript("OnMouseUp", function(self)
        if ZoomPan.Stop then ZoomPan.Stop(self) end
    end)
    CreateLayerSidebar(box, sideW)
    box.noResource = T.Font(box.canvas, "GameFontDisableSmall", TR("Class resource is disabled for this preview resource."), T.colors.muted)
    box.noResource:SetPoint("CENTER", box.canvas, "CENTER", 0, 28)
    box.noResource:Hide()
    CreatePlayerReference(box)
    box.dragFrame = CreateFrame("Frame", nil, UIParent or box.canvas)
    box.dragFrame:SetAllPoints(UIParent or box.canvas)
    if box.dragFrame.SetFrameStrata then box.dragFrame:SetFrameStrata("TOOLTIP") end
    box.dragFrame:EnableMouse(true)
    box.dragFrame:SetScript("OnMouseUp", function(self, button)
        StopHandleDrag(self._handle, button, false)
    end)
    box.dragFrame:Hide()
    box.dragUpdate = DragUpdate
    box.handleClass = MakeHandle(box, "classPower", "bars", "classPowerOffsetX", "classPowerOffsetY", 0, 0, "Class resource bar", { 0.30, 0.78, 0.55 }, "class", "class")
    box.handleClassText = MakeHandle(box, "classPowerText", "bars", "classPowerTextOffsetX", "classPowerTextOffsetY", 0, 0, "Class resource text", { 0.30, 0.78, 0.55 }, "classText", "classText")
    box.handlePower = MakeHandle(box, "detachedPower", "player", "detachedPowerBarOffsetX", "detachedPowerBarOffsetY", 0, -4, "Player power bar", { 0.95, 0.72, 0.18 }, "power", "power")
    box.handlePowerText = MakeHandle(box, "detachedPowerText", "player", "powerOffsetX", "powerOffsetY", -4, 4, "Player power text", { 0.95, 0.72, 0.18 }, "powerText", "powerText")
    box.handleHP = MakeHandle(box, "playerHP", "bars", "playerHPBarOffsetX", "playerHPBarOffsetY", 0, 0, "Second player HP bar", { 0.25, 0.90, 0.42 }, "hp", "hp")
    box.handleHPText = MakeHandle(box, "playerHPText", "bars", "playerHPBarTextOffsetX", "playerHPBarTextOffsetY", 0, 0, "Second player HP text", { 0.25, 0.90, 0.42 }, "hpText", "hpText")
    function section:Refresh()
        local profiling = M.PerfProfile and M.PerfProfile.enabled == true and M.ProfileStart and M.ProfileStop
        local profileStarted = profiling and M.ProfileStart() or nil
        local bars = Bars()
        local player = Player()
        local spec = M.GetClassPowerPreviewSpec and M.GetClassPowerPreviewSpec() or nil
        PaintPlayerReference(box, spec)
        local classFrame = RenderClassPower(box, bars, spec)
        if classFrame and classFrame.IsShown and classFrame:IsShown() then box.noResource:Hide() else box.noResource:Show() end
        local powerFrame = RenderDetachedPower(box, bars, player, classFrame)
        local hpFrame = RenderPlayerHP(box, bars, player, classFrame, powerFrame, spec)
        box._msufCPPreviewAnim = {
            bars = bars,
            player = player,
            spec = spec,
            classFrame = classFrame,
            powerFrame = powerFrame,
            hpFrame = hpFrame,
        }
        SetPreviewSummary(box, classFrame, powerFrame, hpFrame)
        box.layerAvailable = {
            guides = true,
            border = true,
            reference = true,
            class = classFrame ~= nil,
            classText = classFrame ~= nil and bars.classPowerShowText == true,
            power = powerFrame ~= nil,
            powerText = powerFrame ~= nil and player.showPower ~= false and player.detachedPowerBarTextOnBar == true,
            hp = hpFrame ~= nil,
            hpText = hpFrame ~= nil and bars.playerHPBarTextEnabled ~= false,
            bounds = true,
        }
        RefreshBounds(box, classFrame, powerFrame, hpFrame)
        ApplyPreviewZoom(box)
        ApplyLayerVisibility(box)
        RefreshLayerButtons(box)
        RefreshHandleVisuals(box)
        RefreshAnimateButton(box)
        if box._animationEnabled == true then StartAnimationDriver(box) end
        if profiling then M.ProfileStop("preview", "ClassPowerPreview.Refresh", profileStarted) end
    end
    function box:Refresh()
        section:Refresh()
    end
    function box:RefreshAnimation()
        return RefreshClassPowerAnimation(box)
    end
    section:SetScript("OnHide", function()
        box._msufCPRefreshSerial = (tonumber(box._msufCPRefreshSerial) or 0) + 1
        box._msufCPRefreshQueued = nil
        box._msufCPRefreshReason = nil
        StopAnimationDriver(box)
        SetArrowBindings(box, false)
        if box._msufCPPreviewNudgeTarget and rawget(_G, "MSUF_EM2_ActivePreviewNudgeTarget") == box._msufCPPreviewNudgeTarget and type(_G.MSUF_EM2_SetPreviewNudgeTarget) == "function" then _G.MSUF_EM2_SetPreviewNudgeTarget(nil) end
        if box.SetPropagateKeyboardInput then box:SetPropagateKeyboardInput(true) end
        if box.dragFrame then
            box.dragFrame:SetScript("OnUpdate", nil)
            box.dragFrame._handle = nil
            box.dragFrame:Hide()
        end
    end)
    section:SetScript("OnShow", function()
        if box._animationEnabled == true then StartAnimationDriver(box) end
    end)
    M._msuf2ClassPowerInlinePreview = section
    if W.AttachPinnedPreview then
        W.AttachPinnedPreview(section, box, {
            stateKey = "classPowerPreview",
            title = title,
            hint = hint,
            left = 14,
            right = 14,
            top = -8,
            pageKey = ctx and ctx.key,
            wrapper = ctx and ctx.wrapper,
        })
    end
    M.TrackMethodRefresh(ctx, section, "Refresh")
    return section
end
