--[[
    Horizon Suite - Focus - Delve Provider
    ScenarioHeaderDelvesWidget (tierText, currencies, spells), C_PartyInfo.IsDelveInProgress, C_QuestLog.GetQuestTagInfo (QuestTag.Delve).
    Lives remaining: parsed from widget currencies (per-slot textEnabledState or numeric text).
]]

local addon = _G._HorizonSuite_Loading or _G.HorizonSuiteBeta or _G.HorizonSuite

-- Scenario step widget set contains Delve header; Objective Tracker set may not when tracker is hidden.
local WIDGET_TYPE_SCENARIO_HEADER_DELVES = (Enum and Enum.UIWidgetVisualizationType and Enum.UIWidgetVisualizationType.ScenarioHeaderDelves) or 29

-- Get spell name and icon; supports both legacy GetSpellInfo and C_Spell.GetSpellInfo.
local function GetSpellNameAndIcon(spellID)
    if type(spellID) ~= "number" or spellID <= 0 then return nil, nil end
    if GetSpellInfo and type(GetSpellInfo) == "function" then
        local name, _, icon = GetSpellInfo(spellID)
        return name, icon
    end
    if C_Spell and C_Spell.GetSpellInfo then
        local ok, info = pcall(C_Spell.GetSpellInfo, spellID)
        if ok and info and type(info) == "table" then
            return info.name, info.iconID
        end
    end
    return nil, nil
end

--- Find first visible ScenarioHeaderDelves widget info from scenario or objective-tracker set.
--- @return table|nil widgetInfo
local function GetDelveHeaderWidgetInfo()
    if not (C_UIWidgetManager and C_UIWidgetManager.GetAllWidgetsBySetID and C_UIWidgetManager.GetScenarioHeaderDelvesWidgetVisualizationInfo) then
        return nil
    end
    local setID
    if C_Scenario and C_Scenario.GetStepInfo then
        local ok, t = pcall(function()
            return { C_Scenario.GetStepInfo() }
        end)
        if ok and t and type(t) == "table" and #t >= 12 then
            local ws = t[12]
            if type(ws) == "number" and ws ~= 0 then setID = ws end
        end
    end
    if not setID and C_UIWidgetManager.GetObjectiveTrackerWidgetSetID then
        local ok, objSet = pcall(C_UIWidgetManager.GetObjectiveTrackerWidgetSetID)
        if ok and objSet and type(objSet) == "number" then setID = objSet end
    end
    if not setID then return nil end
    local wOk, widgets = pcall(C_UIWidgetManager.GetAllWidgetsBySetID, setID)
    if not wOk or type(widgets) ~= "table" then return nil end
    local WidgetShownState = Enum and Enum.WidgetShownState
    for _, wInfo in pairs(widgets) do
        local widgetID = (wInfo and type(wInfo) == "table" and type(wInfo.widgetID) == "number") and wInfo.widgetID
            or (type(wInfo) == "number" and wInfo > 0) and wInfo
        local wType = (wInfo and type(wInfo) == "table") and wInfo.widgetType
        if widgetID and (not wType or wType == WIDGET_TYPE_SCENARIO_HEADER_DELVES) then
            local dOk, widgetInfo = pcall(C_UIWidgetManager.GetScenarioHeaderDelvesWidgetVisualizationInfo, widgetID)
            if dOk and widgetInfo and type(widgetInfo) == "table" then
                local hidden = WidgetShownState and (widgetInfo.shownState == WidgetShownState.Hidden)
                if not hidden then
                    return widgetInfo
                end
            end
        end
    end
    return nil
end

--- Remaining lives from ScenarioHeaderDelves currencies: Blizzard uses one row per life with textEnabledState, or a single numeric text.
--- @param widgetInfo table
--- @return number|nil
local function ParseDelveLivesRemaining(widgetInfo)
    if not widgetInfo or type(widgetInfo.currencies) ~= "table" then return nil end
    local cur = widgetInfo.currencies
    local n = #cur
    if n == 0 then return nil end

    -- Single aggregate: plain number or "current/max"
    if n == 1 then
        local c = cur[1]
        local t = (c and type(c.text) == "string") and c.text or ""
        local trimmed = t:match("^%s*(.-)%s*$") or ""
        local num = tonumber(trimmed)
        if num ~= nil and num >= 0 and num <= 30 then return num end
        local curLives = trimmed:match("^(%d+)/%d+$")
        if curLives then
            local v = tonumber(curLives)
            if v ~= nil and v >= 0 and v <= 30 then return v end
        end
    end

    -- Multiple slots (typical heart row): count entries whose textEnabledState is not Disabled.
    local Disabled = Enum and Enum.WidgetEnabledState and Enum.WidgetEnabledState.Disabled
    if Disabled ~= nil then
        local sawState = false
        local remaining = 0
        for _, c in ipairs(cur) do
            if type(c) == "table" and c.textEnabledState ~= nil then
                sawState = true
                if c.textEnabledState ~= Disabled then
                    remaining = remaining + 1
                end
            end
        end
        if sawState then return remaining end
    end

    return nil
end

--- Prefer a consistent icon across currency slots for |T embeds in the tracker.
--- @param widgetInfo table
--- @return number|nil fileID
local function GetDelveLivesIconFileID(widgetInfo)
    if not widgetInfo or type(widgetInfo.currencies) ~= "table" then return nil end
    local first
    for _, c in ipairs(widgetInfo.currencies) do
        if type(c) == "table" and type(c.iconFileID) == "number" and c.iconFileID > 0 then
            if not first then
                first = c.iconFileID
            elseif first ~= c.iconFileID then
                return first
            end
        end
    end
    return first
end

--- Build affix list and tier tooltip spell from delve header widget.
--- @param widgetInfo table
--- @return table affixes array (may be empty)
--- @return number|nil tierSpellID
local function BuildAffixesFromWidgetInfo(widgetInfo)
    local affixes = {}
    if not widgetInfo then return affixes, nil end
    local tierSpellID = widgetInfo.tierTooltipSpellID
    if widgetInfo.spells and #widgetInfo.spells > 0 then
        for _, spellInfo in ipairs(widgetInfo.spells) do
            if spellInfo and type(spellInfo.spellID) == "number" and spellInfo.spellID > 0 then
                local name = (spellInfo.text and spellInfo.text ~= "") and spellInfo.text or nil
                local icon
                if not name then
                    name, icon = GetSpellNameAndIcon(spellInfo.spellID)
                else
                    _, icon = GetSpellNameAndIcon(spellInfo.spellID)
                end
                local desc = (spellInfo.tooltip and spellInfo.tooltip ~= "") and spellInfo.tooltip or nil
                if not desc and C_Spell and C_Spell.GetSpellDescription then
                    local spellDescOk, d = pcall(C_Spell.GetSpellDescription, spellInfo.spellID)
                    if spellDescOk and d and type(d) == "string" and d ~= "" then desc = d end
                end
                affixes[#affixes + 1] = {
                    name  = name or ("Spell " .. spellInfo.spellID),
                    desc  = desc or "",
                    icon  = icon,
                }
            end
        end
    end
    return affixes, tierSpellID
end

--- Season affix fallback when the header widget has no spell list.
--- @return table affixes (may be empty)
local function BuildAffixesFromSeasonFallback()
    local affixes = {}
    if not (C_DelvesUI and C_DelvesUI.GetDelvesAffixSpellsForSeason) then return affixes end
    local ok, spellIDs = pcall(C_DelvesUI.GetDelvesAffixSpellsForSeason)
    if not ok or not spellIDs or type(spellIDs) ~= "table" then return affixes end
    for _, spellID in pairs(spellIDs) do
        if type(spellID) == "number" and spellID > 0 then
            local name, spellIcon = GetSpellNameAndIcon(spellID)
            local desc = nil
            if C_Spell and C_Spell.GetSpellDescription then
                local dOk, d = pcall(C_Spell.GetSpellDescription, spellID)
                if dOk and d and type(d) == "string" then desc = d end
            end
            affixes[#affixes + 1] = {
                name  = (name and name ~= "") and name or ("Spell " .. spellID),
                desc  = desc or "",
                icon  = spellIcon,
            }
        end
    end
    return affixes
end

--- True when the quest log tags the quest as Delve (Enum.QuestTag.Delve / C_QuestLog.GetQuestTagInfo).
--- pcall: GetQuestTagInfo can throw on invalid questID.
--- @param questID number
--- @return boolean
local function QuestLogQuestHasDelveTag(questID)
    if type(questID) ~= "number" or questID <= 0 then return false end
    if not (C_QuestLog and C_QuestLog.GetQuestTagInfo) then return false end
    if not (Enum and Enum.QuestTag and Enum.QuestTag.Delve ~= nil) then return false end
    local ok, tagInfo = pcall(C_QuestLog.GetQuestTagInfo, questID)
    if not ok or type(tagInfo) ~= "table" or type(tagInfo.tagID) ~= "number" then return false end
    return tagInfo.tagID == Enum.QuestTag.Delve
end

--- Nearby Delve-tagged log quests while in an active Delve on a dungeon/micro map.
--- Scenario / widget-driven delve UI comes from ReadScenarioEntries; this list is only Delve-tagged quests.
local function CollectDelveQuests(ctx)
    if not addon.IsDelveActive() then return {} end
    local playerMapID = (C_Map and C_Map.GetBestMapForUnit) and C_Map.GetBestMapForUnit("player") or nil
    local mapInfo = (playerMapID and C_Map and C_Map.GetMapInfo) and C_Map.GetMapInfo(playerMapID) or nil
    local mapType = mapInfo and mapInfo.mapType
    local isInstanceMap = (mapType == 4 or mapType == 5)  -- 4 = Dungeon, 5 = Micro (Delve)
    if not playerMapID or not isInstanceMap then return {} end

    local out = {}
    local nearbySet = ctx.nearbySet or {}
    local seen = ctx.seen or {}
    for questID, _ in pairs(nearbySet) do
        if not seen[questID] and not addon.IsQuestWorldQuest(questID) then
            if not (C_QuestLog.IsQuestCalling and C_QuestLog.IsQuestCalling(questID)) then
                if QuestLogQuestHasDelveTag(questID) then
                    local logIdx = C_QuestLog.GetLogIndexForQuestID(questID)
                    if logIdx then
                        local info = C_QuestLog.GetInfo and C_QuestLog.GetInfo(logIdx)
                        if info and not info.isHidden then
                            out[#out + 1] = { questID = questID, opts = { isTracked = false, forceCategory = "DELVES" } }
                        end
                    end
                end
            end
        end
    end
    return out
end

--- Single read of delve header widget: affixes, tier spell, lives, life icon. Safe when not in a delve.
--- @return table|nil { affixes, tierSpellID, livesRemaining, livesIconFileID } — affixes may be nil if empty
function addon.GetDelveScenarioHeaderMetadata()
    local result = {
        affixes           = nil,
        tierSpellID       = nil,
        livesRemaining    = nil,
        livesIconFileID   = nil,
    }
    if not addon.IsDelveActive() then return result end

    local widgetInfo = GetDelveHeaderWidgetInfo()
    if widgetInfo then
        result.livesRemaining = ParseDelveLivesRemaining(widgetInfo)
        result.livesIconFileID = GetDelveLivesIconFileID(widgetInfo)
        local affixes, tierSpellID = BuildAffixesFromWidgetInfo(widgetInfo)
        result.tierSpellID = tierSpellID
        if #affixes > 0 then
            result.affixes = affixes
        end
    end

    if not result.affixes then
        local fallback = BuildAffixesFromSeasonFallback()
        if #fallback > 0 then
            result.affixes = fallback
        end
    end

    return result
end

--- Returns season affixes for the current Delve when in an active Delve, or nil.
--- Used by the quest block to show affixes inline. Tries UI Widget (Blizzard's source) first,
--- then C_DelvesUI.GetDelvesAffixSpellsForSeason. May return nil/empty when Blizzard's
--- objective tracker is hidden (Horizon replaces it) as widgets may not be populated.
--- @return table|nil Array of { name, desc, icon } or nil if not in Delve or no affixes
--- @return number|nil tierTooltipSpellID
local function GetDelvesAffixes()
    local meta = addon.GetDelveScenarioHeaderMetadata()
    if not meta then return nil, nil end
    return meta.affixes, meta.tierSpellID
end

--- Single life icon + numeric count for the tracker title row (FontString SetText).
--- @param count number Lives remaining (> 0)
--- @param iconFileID number|nil From widget currency; fallback to red ♥ glyph
--- @return string
function addon.FormatDelveLivesHeartsForTitle(count, iconFileID)
    if type(count) ~= "number" or count < 1 then return "" end
    local sz = tonumber(addon.DELVE_LIFE_EMBED_SIZE) or 13
    local iconSeg
    if type(iconFileID) == "number" and iconFileID > 0 then
        iconSeg = ("|T%d:%d:%d:0:-1|t"):format(iconFileID, sz, sz)
    else
        -- UTF-8 BLACK HEART SUIT (U+2665), tinted red — works on default title fonts.
        iconSeg = "|cffff5555\226\153\165|r"
    end
    return iconSeg .. " " .. tostring(math.floor(count))
end

addon.CollectDelveQuests = CollectDelveQuests
addon.GetDelvesAffixes   = GetDelvesAffixes
