NanamiPlates_Castbar = {}

local GetTime = GetTime
local UnitGUID = UnitGUID
local UnitName = UnitName
local superwow_active = (SpellInfo ~= nil) or (UnitGUID ~= nil) or (SUPERWOW_VERSION ~= nil)

local castDB

local function InitReferences()
    castDB = NanamiPlates.castDB
end

local function HandleUnitCastEvent(guid, target, eventType, spellId, timer)
    if not castDB then
        castDB = NanamiPlates.castDB
    end
    if not castDB then return false end

    local SpellDB = NanamiPlates_SpellDB

    if eventType == "START" or eventType == "CAST" or eventType == "CHANNEL" then
        local spell, icon
        if SpellInfo and spellId then
            spell, _, icon = SpellInfo(spellId)
        end
        spell = spell or "Casting"
        icon = icon or "Interface\\Icons\\INV_Misc_QuestionMark"

        if SpellDB and eventType == "CAST" then
            local effectTarget = target
            local isOwn = (guid == (UnitGUID and UnitGUID("player")))

            if (not effectTarget or effectTarget == "") and isOwn then
                if UnitExists("target") then
                    effectTarget = UnitGUID and UnitGUID("target") or UnitName("target")
                end
            end

            if effectTarget and effectTarget ~= "" then
                local duration = SpellDB:GetDuration(spell, 0)
                if duration and duration > 0 then
                    SpellDB:RefreshEffect(effectTarget, 0, spell, duration, isOwn)
                    if NanamiPlates_Auras and NanamiPlates_Auras.timers then
                        NanamiPlates_Auras.timers[effectTarget .. "_" .. spell] = nil
                    end
                    if isOwn then
                        local targetName = UnitExists("target") and UnitName("target")
                        if targetName and targetName ~= effectTarget then
                            SpellDB:RefreshEffect(targetName, 0, spell, duration, true)
                            NanamiPlates_Auras.timers[targetName .. "_" .. spell] = nil
                        end
                        if SpellDB.OWNER_BOUND_DEBUFFS and SpellDB.OWNER_BOUND_DEBUFFS[spell] then
                            SpellDB:TrackOwnerBoundDebuff(effectTarget, spell, duration)
                            if targetName and targetName ~= effectTarget then
                                SpellDB:TrackOwnerBoundDebuff(targetName, spell, duration)
                            end
                        end
                    end
                end
            end
        end

        if eventType == "CAST" then
            if castDB[guid] and castDB[guid].spell ~= spell then
                return true
            end
        end

        castDB[guid] = {
            spell = spell,
            startTime = GetTime(),
            duration = timer or 2000,
            icon = icon,
            channel = (eventType == "CHANNEL")
        }
    elseif eventType == "FAIL" then
        if castDB[guid] then
            castDB[guid] = nil
        end
    end

    return false
end

local function ClearCastData()
    if not castDB then castDB = NanamiPlates.castDB end
    if castDB then
        for k in pairs(castDB) do castDB[k] = nil end
    end
end

local function GetCast(guid)
    if not castDB then castDB = NanamiPlates.castDB end
    return castDB and castDB[guid]
end

local function RemoveCast(guid)
    if not castDB then castDB = NanamiPlates.castDB end
    if castDB and castDB[guid] then castDB[guid] = nil end
end

NanamiPlates_Castbar = {
    InitReferences = InitReferences,
    HandleUnitCastEvent = HandleUnitCastEvent,
    ClearCastData = ClearCastData,
    GetCast = GetCast,
    RemoveCast = RemoveCast,
}

NanamiPlates.Castbar = NanamiPlates_Castbar