local _, GW = ...
local GetSetting = GW.GetSetting

local questState = "NONE"
local questStateSet = false
local QUESTSTRING = {}
local QUESTREQ = {["stuff"] = {}, ["currency"] = {}, ["money"] = 0, ["text"] = {}}
local QUESTSTRINGINT = 0
local QUEST_NPC_TYPE = 0

--[[
GwQuestviewFrame
GwQuestviewFrameContainerPlayerModel
GwQuestviewFrameContainerGiverModel
GwQuestviewFrameContainerDialogString
GwQuestviewFrameContainerDialogQuestTitle
GwQuestviewFrameContainerAcceptButton
--]]
local function splitIter(inputstr, pat)
    local st, g = 1, string.gmatch(inputstr, "()(" .. pat .. ")")
    local function getter(segs, seps, sep, cap1, ...)
        st = sep and seps + #sep
        return string.sub(inputstr, segs, seps or -1), cap1 or sep, ...
    end
    return function()
        if st then
            return getter(st, g())
        end
    end
end
GW.AddForProfiling("questview", "splitIter", splitIter)

local function splitQuest(inputstr)
    local sep = "[\\.|!|?|>]%s+"
    inputstr = inputstr:gsub("\n", " ")
    inputstr = inputstr:gsub(" %s+", " ")
    inputstr = inputstr:gsub("%.%.%.", "…")
    local t = {}
    i = 1
    for str in splitIter(inputstr, sep) do
        if str ~= nil and str ~= "" then
            t[i] = str
            i = i + 1
        end
    end
    return t
end
GW.AddForProfiling("questview", "splitQuest", splitQuest)

local function styleRewards()
    QuestInfoRewardsFrame.Header:SetFont("UNIT_NAME_FONT", 14)
    QuestInfoRewardsFrame.Header:SetTextColor(1, 1, 1)
    QuestInfoRewardsFrame.Header:SetShadowColor(0, 0, 0, 1)

    QuestInfoRewardsFrame.ItemChooseText:SetFont("UNIT_NAME_FONT", 12)
    QuestInfoRewardsFrame.ItemChooseText:SetTextColor(1, 1, 1)
    QuestInfoRewardsFrame.ItemChooseText:SetShadowColor(0, 0, 0, 1)

    QuestInfoRewardsFrame.ItemReceiveText:SetFont("UNIT_NAME_FONT", 12)
    QuestInfoRewardsFrame.ItemReceiveText:SetTextColor(1, 1, 1)
    QuestInfoRewardsFrame.ItemReceiveText:SetShadowColor(0, 0, 0, 1)

    QuestInfoRewardsFrame.PlayerTitleText:SetFont("UNIT_NAME_FONT", 12)
    QuestInfoRewardsFrame.PlayerTitleText:SetTextColor(1, 1, 1)
    QuestInfoRewardsFrame.PlayerTitleText:SetShadowColor(0, 0, 0, 1)

    QuestInfoXPFrame.ReceiveText:SetFont("UNIT_NAME_FONT", 12)
    QuestInfoXPFrame.ReceiveText:SetTextColor(1, 1, 1)
    QuestInfoXPFrame.ReceiveText:SetShadowColor(0, 0, 0, 1)

    GwQuestviewFrameContainerDialogRequired:SetFont("UNIT_NAME_FONT", 14)
    GwQuestviewFrameContainerDialogRequired:SetTextColor(1, 1, 1)
    GwQuestviewFrameContainerDialogRequired:SetShadowColor(0, 0, 0, 1)
    GwQuestviewFrameContainerDialogRequired:SetText(GwLocalization["QUEST_REQUIRED_ITEMS"])
end
GW.AddForProfiling("questview", "styleRewards", styleRewards)

local function hideBlizzardQuestFrame()
    QuestFrame:ClearAllPoints()
    QuestFrame:SetPoint("RIGHT", UIParent, "LEFT", -800, 0)
end
GW.AddForProfiling("questview", "hideBlizzardQuestFrame", hideBlizzardQuestFrame)

local emotes = {
    ["Idle"] = 0,
    ["Dead"] = 6,
    ["Talk"] = 60,
    ["TalkExclamation"] = 64,
    ["TalkQuestion"] = 65,
    ["Bow"] = 66,
    ["Point"] = 84,
    ["Salute"] = 113,
    ["Drowned"] = 132,
    ["Yes"] = 185,
    ["No"] = 186
}
local mid_set = {"Idle", "Talk", "Yes", "No", "Point"}
local end_set = {"Bow", "Salute"}
local anim_next = 0
local anim_playing = false
local function setQuestGiverAnimation(count)
    if QUESTSTRING[QUESTSTRINGINT] == nil then
        return
    end

    if QUEST_NPC_TYPE ~= 3 then
        -- showing board/non-NPC/dead model, don't need anims
        return
    end

    if QUESTSTRINGINT == 1 then
        GwQuestviewFrameContainerGiverModel:SetScript("OnAnimFinished", nil)
        anim_next = 0
        anim_playing = false
    end

    -- determine main emote to play for this line
    local a = emotes["Talk"]
    local s = string.sub(QUESTSTRING[QUESTSTRINGINT], -1)
    if QUESTSTRINGINT >= count then
        a = emotes[end_set[math.random(1, #end_set)]]
    elseif s == "!" then
        a = emotes["TalkExclamation"]
    elseif s == "?" then
        a = emotes["TalkQuestion"]
    end

    -- if playing something, don't interrupt to avoid spastic motions on click-thru
    if anim_playing then
        if a == emotes["Talk"] then
            anim_next = emotes[mid_set[math.random(1, #mid_set)]]
        else
            anim_next = a
        end
    else
        anim_playing = true
        if QUESTSTRINGINT < count then
            anim_next = emotes[mid_set[math.random(1, #mid_set)]]
        end
        GwQuestviewFrameContainerGiverModel:SetScript(
            "OnAnimFinished",
            function(self)
                if anim_next ~= 0 then
                    self:SetAnimation(anim_next)
                    anim_next = 0
                else
                    self:SetScript("OnAnimFinished", nil)
                    anim_playing = false
                    self:SetAnimation(0)
                end
            end
        )
        GwQuestviewFrameContainerGiverModel:SetAnimation(a)
    end
end
GW.AddForProfiling("questview", "setQuestGiverAnimation", setQuestGiverAnimation)

local function showRewards()
    local xp = GetRewardXP()
    local money = GetRewardMoney()
    local title = GetRewardTitle()
    local currency = GetNumRewardCurrencies()
    local _, _, skillPoints = GetRewardSkillPoints()
    local items = GetNumQuestRewards()
    local spells = GetNumRewardSpells()
    local choices = GetNumQuestChoices()

    local qinfoHeight = 300
    local qinfoTop = -20

    styleRewards()

    if (QUESTREQ["money"] > 0 or #QUESTREQ["currency"] > 0 or #QUESTREQ["stuff"] > 0) then
        qinfoHeight = 150
        qinfoTop = 55

        UIFrameFadeIn(GwQuestviewFrameContainerDialogRequired, 0.1, 0, 1)

        if QUESTREQ["money"] > 0 then
            UIFrameFadeIn(QuestProgressRequiredMoneyFrame, 0.1, 0, 1)
            QuestProgressRequiredMoneyFrame:SetParent(GwQuestviewFrame)
            QuestProgressRequiredMoneyFrame:ClearAllPoints()
            QuestProgressRequiredMoneyFrame:SetPoint("CENTER", GwQuestviewFrame, "CENTER", 0, -30)
            QuestProgressRequiredMoneyFrame:SetFrameLevel(5)
        end
        local itemReq = #QUESTREQ["currency"] + #QUESTREQ["stuff"]
        local itemHeight = 0
        local itemWidth = 0
        for i = 1, itemReq, 1 do
            local frame = _G["QuestProgressItem" .. i]
            if (frame) then
                if itemHeight == 0 then
                    itemHeight = math.ceil(frame:GetHeight())
                end
                if itemWidth == 0 then
                    itemWidth = math.ceil(frame:GetWidth())
                end
                UIFrameFadeIn(frame, 0.1, 0, 1)
                frame:SetParent(GwQuestviewFrame)
                frame:ClearAllPoints()
                frame:SetPoint(
                    "TOPLEFT",
                    GwQuestviewFrame,
                    "CENTER",
                    (((i + 1) % 2) * (itemWidth + 20) - 160),
                    -(itemHeight + 9) * (math.ceil(i / 2))
                )
                frame:SetFrameLevel(5)
                frame:SetScript(
                    "OnEnter",
                    function()
                    end
                ) -- TODO: tooltips disabled because it dies for currency types
            end
        end
    end

    if (xp > 0 or money > 0 or title or currency > 0 or skillPoints or items > 0 or spells > 0 or choices > 0) then
        UIFrameFadeIn(QuestInfoRewardsFrame, 0.1, 0, 1)
        QuestInfoRewardsFrame:SetParent(GwQuestviewFrame)
        QuestInfoRewardsFrame:SetWidth(400)
        QuestInfoRewardsFrame:SetHeight(qinfoHeight)

        QuestInfoRewardsFrame:ClearAllPoints()
        QuestInfoRewardsFrame:SetPoint("CENTER", GwQuestviewFrame, "CENTER", 40, qinfoTop)
        QuestInfoRewardsFrame:SetFrameLevel(5)
    end
end
GW.AddForProfiling("questview", "showRewards", showRewards)

local function questTextCompleted()
    if questStateSet then
        return
    end
    if questState == "COMPLETE" then
        showRewards()
        GwQuestviewFrameContainerAcceptButton:SetText(COMPLETE_QUEST)
    elseif questState == "PROGRESS" then
        showRewards()
        GwQuestviewFrameContainerAcceptButton:SetText(GwLocalization["QUEST_VIEW_SKIP"])
    else
        showRewards()
        GwQuestviewFrameContainerAcceptButton:SetText(ACCEPT)
    end
    questStateSet = true
end
GW.AddForProfiling("questview", "questTextCompleted", questTextCompleted)

local function nextGossip()
    QUESTSTRINGINT = QUESTSTRINGINT + 1
    count = 0
    for k, v in pairs(QUESTSTRING) do
        count = count + 1
    end
    if QUESTSTRINGINT <= count then
        GwQuestviewFrameContainerDialogString:SetText(QUESTSTRING[QUESTSTRINGINT])
        setQuestGiverAnimation(count)
        if QUESTSTRINGINT ~= 1 then
            PlaySound(906)
        end
        if QUESTSTRINGINT == count then
            questTextCompleted()
        else
            GwQuestviewFrameContainerAcceptButton:SetText(GwLocalization["QUEST_VIEW_SKIP"])
        end
    else
        questTextCompleted()
    end
end
GW.AddForProfiling("questview", "nextGossip", nextGossip)

local function setPMUnit(PM, unit, side, is_dead, crace, cgender)
    local uX, uY, uZ, uF = -1.25, -0.65, -0.2, 0.7 -- fac 0.7
    if side > 0 then
        uY = -uY
        uF = -uF
    end

    -- Reset camera each time because it can bug out when the frame is hidden
    PM:ClearModel()
    PM:SetUnit("none")

    -- SetUnit does magical camera work to get things in frame so set facing & position first
    PM:SetFacing(uF)
    PM:SetPosition(uX, uY, uZ)
    PM:SetUnit(unit)
    if crace then
        PM:SetCustomRace(crace, cgender)
    end

    -- Check the auto camera alignment, adjust if needed; larger units tend to be placed
    -- too high and too inward and smaller units vice-versa; this is hacky normalization
    -- but is much more light-weight than analyzing model paths/categories
    local cpos = {PM:GetCameraPosition()}
    local ctar = {PM:GetCameraTarget()}

    if not cpos or not ctar or not cpos[1] or not cpos[3] or not ctar[1] or not ctar[3] then
        return
    end

    local zdiff = (cpos[3] / ctar[3]) ^ 4 / (cpos[1] - ctar[1])
    local ydiff = (cpos[1] - ctar[1])
    local dirty = 0

    if zdiff > 0.6 then
        local adj = 0.04 * zdiff ^ 2
        if adj > 1 then
            adj = 1
        end
        uZ = uZ - adj
        dirty = 1
    elseif zdiff < 0.4 then
        local adj = 0.02 / zdiff ^ 1.5
        if adj > 1 then
            adj = 1
        end
        uZ = uZ + adj
        dirty = 1
    end
    if ydiff < 1.4 then
        local adj = 0.15 * ydiff / 1.4
        if adj > 1 then
            adj = 1
        end
        if side > 0 then
            uY = uY - adj
        else
            uY = uY + adj
        end
        dirty = 1
    elseif ydiff > 2 then
        local adj = 0.15 * ydiff / 2
        if adj > 1 then
            adj = 1
        end
        if side > 0 then
            uY = uY + adj
        else
            uY = uY - adj
        end
        dirty = 1
    end
    if is_dead then
        uZ = uZ + 0.3
        dirty = 1
    end
    if dirty then
        PM:SetPosition(uX, uY, uZ)
        PM:SetUnit(unit)
        if crace then
            PM:SetCustomRace(crace, cgender)
        end
    end
    if is_dead then
        PM:SetAnimation(emotes.Dead)
    end
end
GW.AddForProfiling("questview", "setPMUnit", setPMUnit)

local function showQuestFrame()
    GwQuestviewFrameContainerDialogQuestTitle:SetText(GetTitleText())
    GwQuestviewFrame:Show()

    setPMUnit(GwQuestviewFrameContainerPlayerModel, "player", 0)

    local npc_name = GetUnitName("npc")
    local npc_type = UnitCreatureType("npc")

    if UnitIsUnit("npc", "player") then
        local board = "World/Expansion06/Doodads/Artifact/7AF_Paladin_MissionBoard01.m2"
        QUEST_NPC_TYPE = 1
        GwQuestviewFrameContainerGiverModel:ClearModel()
        GwQuestviewFrameContainerGiverModel:SetUnit("none")
        GwQuestviewFrameContainerGiverModel:SetModel(board)
        GwQuestviewFrameContainerGiverModel:SetFacing(-0.5)
        GwQuestviewFrameContainerGiverModel:SetPosition(-15, 1.9, -0.8)
    elseif npc_name and npc_type then
        if UnitIsDead("npc") then
            QUEST_NPC_TYPE = 2
            setPMUnit(GwQuestviewFrameContainerGiverModel, "npc", 1, true)
        else
            QUEST_NPC_TYPE = 3
            setPMUnit(GwQuestviewFrameContainerGiverModel, "npc", 1)
        end
    end
    PlaySoundFile("Interface\\AddOns\\GW2_UI\\sounds\\dialog_open.ogg", "SFX")
end
GW.AddForProfiling("questview", "showQuestFrame", showQuestFrame)

local function clearQuestReq()
    questState = "NONE"
    questStateSet = false

    QuestProgressRequiredMoneyFrame:Hide()

    for i = 0, #QUESTSTRING do
        QUESTSTRING[i] = nil
    end

    QUESTREQ["money"] = 0

    local countStuff = #QUESTREQ["stuff"]
    for i = 0, countStuff do
        QUESTREQ["stuff"][i] = nil
    end

    local countCurrency = #QUESTREQ["currency"]
    for i = 0, countCurrency do
        QUESTREQ["currency"][i] = nil
    end

    local countText = #QUESTREQ["text"]
    for i = 0, countText do
        QUESTREQ["text"][i] = nil
    end
end
GW.AddForProfiling("questview", "clearQuestReq", clearQuestReq)

local function LoadQuestview()
    CreateFrame("Frame", "GwQuestviewFrame", UIParent, "GwQuestviewFrame")
    GwQuestviewFrameContainerDialogString:SetFont(STANDARD_TEXT_FONT, 14)
    GwQuestviewFrameContainerDialogString:SetTextColor(1, 1, 1)
    GwQuestviewFrameContainerDialogQuestTitle:SetTextColor(255 / 255, 197 / 255, 39 / 255)
    GwQuestviewFrameContainerDialogQuestTitle:SetFont(DAMAGE_TEXT_FONT, 24)
    GwQuestviewFrameContainerDeclineQuest:SetText(IGNORE)

    GwQuestviewFrame:SetScript(
        "OnShow",
        function()
            UIFrameFadeIn(GwQuestviewFrameBackgroundBorder, 0.1, 0, 1)
            UIFrameFadeIn(GwQuestviewFrameBackground, 0.5, 0, 1)
        end
    )

    GwQuestviewFrame:RegisterEvent("QUEST_DETAIL")
    GwQuestviewFrame:RegisterEvent("QUEST_FINISHED")
    GwQuestviewFrame:RegisterEvent("QUEST_COMPLETE")
    GwQuestviewFrame:RegisterEvent("QUEST_PROGRESS")

    GwQuestviewFrame:SetScript(
        "OnEvent",
        function(self, event, ...)
            if event == "QUEST_PROGRESS" then
                hideBlizzardQuestFrame()
                clearQuestReq()
                QUESTREQ["money"] = GetQuestMoneyToGet()
                for i = GetNumQuestItems(), 1, -1 do
                    if (IsQuestItemHidden(i) == 0) then
                        table.insert(QUESTREQ["stuff"], 1, {GetQuestItemInfo("required", i)})
                    end
                end
                for i = GetNumQuestCurrencies(), 1, -1 do
                    table.insert(QUESTREQ["currency"], 1, {GetQuestCurrencyInfo("required", i)})
                end
                if (QUESTREQ["money"] > 0 or #QUESTREQ["currency"] > 0 or #QUESTREQ["stuff"] > 0) then
                    QUESTREQ["text"] = splitQuest(GetProgressText())
                end
                if IsQuestCompletable() then
                    -- there will be a QUEST_COMPLETE event shortly
                    CompleteQuest()
                    questState = "AUTOPROGRESS"
                    questStateSet = false
                else
                    showQuestFrame()
                    QUESTSTRING = splitQuest(GetProgressText())
                    QUESTSTRINGINT = 0
                    questState = "PROGRESS"
                    questStateSet = false
                    nextGossip()
                end
            end
            if event == "QUEST_DETAIL" then
                local questStartItemID = ...
                if (questStartItemID ~= nil and questStartItemID ~= 0) or QuestIsFromAreaTrigger() then
                    if GetSetting("QUESTTRACKER_ENABLED") then
                        AcknowledgeAutoAcceptQuest()
                    end
                    return
                end
                if (questState ~= "AUTOPROGRESS") then
                    hideBlizzardQuestFrame()
                    clearQuestReq()
                end
                showQuestFrame()
                QUESTSTRING = splitQuest(GetQuestText())
                if not IsQuestCompletable() then
                    table.insert(QUESTSTRING, GetObjectiveText())
                end
                QUESTSTRINGINT = 0
                questState = "TAKE"
                questStateSet = false
                nextGossip()
            end
            if event == "QUEST_COMPLETE" then
                if (questState ~= "AUTOPROGRESS") then
                    hideBlizzardQuestFrame()
                    clearQuestReq()
                end
                showQuestFrame()
                QUESTSTRING = splitQuest(GetRewardText())
                if (#QUESTREQ["text"] > 0) then
                    for i = #QUESTREQ["text"], 1, -1 do
                        table.insert(QUESTSTRING, 1, QUESTREQ["text"][i])
                    end
                end
                QUESTSTRINGINT = 0
                questState = "COMPLETE"
                questStateSet = false
                nextGossip()
            end

            if event == "QUEST_FINISHED" then
                QuestInfoRewardsFrame:Hide()
                QuestProgressRequiredMoneyFrame:Hide()
                GwQuestviewFrameContainerDialogRequired:Hide()
                for i = 1, 32, 1 do
                    local frame = _G["QuestProgressItem" .. i]
                    if (frame) then
                        frame:Hide()
                    end
                end
                GwQuestviewFrame:Hide()
                if (questState ~= "PROGRESS") then
                    PlaySoundFile("Interface\\AddOns\\GW2_UI\\sounds\\dialog_close.ogg", "SFX")
                end
                clearQuestReq()
            end
        end
    )
    GwQuestviewFrameContainerDialog:RegisterForClicks("LeftButtonUp", "RightButtonUp")

    GwQuestviewFrameContainerDialog:SetScript(
        "OnClick",
        function(self, event, addon)
            nextGossip()
        end
    )
    GwQuestviewFrameContainerDeclineQuest:SetScript(
        "OnClick",
        function(self, event, addon)
            if questState == "TAKE" then
                DeclineQuest()
            else
                CloseQuest()
            end
        end
    )
    GwQuestviewFrameContainerAcceptButton:SetScript(
        "OnClick",
        function(self, event, addon)
            Stringcount = 0
            for k, v in pairs(QUESTSTRING) do
                Stringcount = Stringcount + 1
            end

            if QUESTSTRINGINT < Stringcount then
                QUESTSTRINGINT = Stringcount - 1
                nextGossip()
            else
                if questState == "TAKE" then
                    if (QuestFlagsPVP()) then
                        QuestFrame.dialog = StaticPopup_Show("CONFIRM_ACCEPT_PVP_QUEST")
                    else
                        if (QuestFrame.autoQuest) then
                            AcknowledgeAutoAcceptQuest()
                        else
                            AcceptQuest()
                            CloseQuest()
                        end
                    end
                elseif questState == "PROGRESS" then
                    CloseQuest()
                else
                    if (GetNumQuestChoices() == 0) then
                        GetQuestReward()
                        CloseQuest()
                    elseif (GetNumQuestChoices() == 1) then
                        GetQuestReward(1)
                        CloseQuest()
                    else
                        if (QuestInfoFrame.itemChoice == 0) then
                            QuestChooseRewardError()
                        else
                            GetQuestReward(QuestInfoFrame.itemChoice)
                            CloseQuest()
                        end
                    end
                end
            end
        end
    )
end
GW.LoadQuestview = LoadQuestview
