local ADDON_NAME = "HailMaryGuildTools"
local HMGT = LibStub("AceAddon-3.0"):GetAddon(ADDON_NAME)
if not HMGT then return end

HMGT.TrackerDetection = HMGT.TrackerDetection or {}

local internals = HMGT.TrackerInternals or {}
local GetSpellChargesInfo = internals.GetSpellChargesInfo
local GetSpellCooldownInfo = internals.GetSpellCooldownInfo
local GetGlobalCooldownInfo = internals.GetGlobalCooldownInfo
local GetSpellDebugLabel = internals.GetSpellDebugLabel
local BuildCooldownStateFingerprint = internals.BuildCooldownStateFingerprint
local ApplyOwnCooldownReducers = internals.ApplyOwnCooldownReducers
local ApplyObservedCooldownReducers = internals.ApplyObservedCooldownReducers

function HMGT:HandleOwnSpellCast(spellId)
    local isInterrupt = HMGT_SpellData.InterruptLookup[spellId] ~= nil
    local isCooldown = HMGT_SpellData.CooldownLookup[spellId] ~= nil
    if not isInterrupt and not isCooldown then return end

    local spellEntry = HMGT_SpellData.InterruptLookup[spellId]
                    or HMGT_SpellData.CooldownLookup[spellId]
    spellId = tonumber(spellEntry and spellEntry.spellId) or spellId
    local name = self:NormalizePlayerName(UnitName("player"))
    local pData = self.playerData[name]
    local talents = pData and pData.talents or {}
    if self:IsAvailabilitySpell(spellEntry) then
        self:LogTrackedSpellCast(name, spellEntry, {
            stateKind = "availability",
            required = HMGT_SpellData.GetEffectiveAvailabilityRequired(spellEntry, talents),
        })
        if self:RefreshOwnAvailabilitySpell(spellEntry) then
            self:PublishOwnSpellState(spellId, { sendLegacy = true })
        end
        self:TriggerTrackerUpdate()
        return
    end

    local effectiveCd = HMGT_SpellData.GetEffectiveCooldown(spellEntry, talents)
    local now = GetTime()
    local inCombat = InCombatLockdown and InCombatLockdown()
    local cur, max, chargeStart, chargeDuration = nil, nil, nil, nil
    if not inCombat and GetSpellChargesInfo then
        cur, max, chargeStart, chargeDuration = GetSpellChargesInfo(spellId)
    end
    local cachedMaxCharges, cachedChargeDuration = self:GetKnownChargeInfo(
        spellEntry,
        talents,
        spellId,
        (not inCombat and tonumber(chargeDuration) and tonumber(chargeDuration) > 0) and tonumber(chargeDuration) or effectiveCd
    )
    local inferredMaxCharges, inferredChargeDuration = HMGT_SpellData.GetEffectiveChargeInfo(
        spellEntry,
        talents,
        (not inCombat and tonumber(max) and tonumber(max) > 0) and tonumber(max) or ((cachedMaxCharges > 0) and cachedMaxCharges or nil),
        (not inCombat and tonumber(chargeDuration) and tonumber(chargeDuration) > 0) and tonumber(chargeDuration)
            or ((cachedChargeDuration > 0) and cachedChargeDuration or effectiveCd)
    )

    local hasCharges = ((tonumber(max) or 0) > 1) or (tonumber(inferredMaxCharges) or 0) > 1
    local currentCharges = 0
    local maxCharges = 0
    local chargeDur = 0
    local chargeStartTime = nil

    local startTime = now
    local duration = effectiveCd
    local expiresIn = effectiveCd

    local existingCd = self:GetActiveCooldown(name, spellId)
    if existingCd and (tonumber(existingCd.maxCharges) or 0) > 0 then
        self:ResolveChargeState(existingCd, now)
    end

    if hasCharges then
        maxCharges = math.max(1, tonumber(max) or cachedMaxCharges or tonumber(inferredMaxCharges) or 1)
        currentCharges = tonumber(cur)
        if currentCharges == nil then
            local prevCharges = existingCd and tonumber(existingCd.currentCharges)
            local prevMax = existingCd and tonumber(existingCd.maxCharges)
            if prevCharges and prevMax and prevMax == maxCharges then
                currentCharges = math.max(0, prevCharges - 1)
            else
                currentCharges = math.max(0, maxCharges - 1)
            end
        end
        currentCharges = math.max(0, math.min(maxCharges, currentCharges))

        chargeDur = tonumber(chargeDuration)
            or cachedChargeDuration
            or tonumber(inferredChargeDuration)
            or tonumber(effectiveCd)
            or 0
        chargeDur = math.max(0, chargeDur)
        self:StoreKnownChargeInfo(spellId, maxCharges, chargeDur)

        if currentCharges < maxCharges and chargeDur > 0 then
            chargeStartTime = tonumber(chargeStart) or now
            local missing = maxCharges - currentCharges
            startTime = chargeStartTime
            duration = missing * chargeDur
            expiresIn = math.max(0, duration - (now - startTime))
        else
            startTime = now
            duration = 0
            expiresIn = 0
        end
    end

    self:Debug(
        "verbose",
        "HandleOwnSpellCast name=%s spellId=%s cd=%.2f charges=%s/%s",
        tostring(name),
        tostring(spellId),
        tonumber(effectiveCd) or 0,
        hasCharges and tostring(currentCharges) or "-",
        hasCharges and tostring(maxCharges) or "-"
    )

    self._cdNonce = (self._cdNonce or 0) + 1
    local nonce = self._cdNonce

    self:SetActiveCooldown(name, spellId, {
        startTime = startTime,
        duration = duration,
        spellEntry = spellEntry,
        currentCharges = hasCharges and currentCharges or nil,
        maxCharges = hasCharges and maxCharges or nil,
        chargeStart = hasCharges and chargeStartTime or nil,
        chargeDuration = hasCharges and chargeDur or nil,
        _nonce = nonce,
    })

    self:LogTrackedSpellCast(name, spellEntry, {
        cooldown = effectiveCd,
        currentCharges = hasCharges and currentCharges or nil,
        maxCharges = hasCharges and maxCharges or nil,
        chargeCooldown = hasCharges and chargeDur or nil,
    })

    if expiresIn > 0 then
        self:ScheduleTimer(function()
            local current = self:GetActiveCooldown(name, spellId)
            if current and current._nonce == nonce then
                self:ClearActiveCooldown(name, spellId)
                self:PublishOwnSpellState(spellId)
                self:TriggerTrackerUpdate()
            end
        end, expiresIn)
    end

    self:PublishOwnSpellState(spellId, { sendLegacy = true })
    self:TriggerTrackerUpdate()
end

function HMGT:RefreshOwnCooldownStateFromGame(spellId)
    local sid = tonumber(spellId)
    if not sid then return false end
    if InCombatLockdown and InCombatLockdown() then
        return false
    end

    local ownName = self:NormalizePlayerName(UnitName("player"))
    if not ownName then return false end

    local spellEntry = HMGT_SpellData.InterruptLookup[sid]
                    or HMGT_SpellData.CooldownLookup[sid]
    if not spellEntry or self:IsAvailabilitySpell(spellEntry) then
        return false
    end
    sid = tonumber(spellEntry.spellId) or sid

    local existing = self:GetActiveCooldown(ownName, sid)
    local before = BuildCooldownStateFingerprint and BuildCooldownStateFingerprint(existing) or "nil"
    local now = GetTime()
    local pData = self.playerData[ownName]
    local talents = pData and pData.talents or {}
    local effectiveCd = HMGT_SpellData.GetEffectiveCooldown(spellEntry, talents)
    local cur, max, chargeStart, chargeDuration = nil, nil, nil, nil
    if GetSpellChargesInfo then
        cur, max, chargeStart, chargeDuration = GetSpellChargesInfo(sid)
    end
    local inferredMaxCharges, inferredChargeDuration = HMGT_SpellData.GetEffectiveChargeInfo(
        spellEntry,
        talents,
        (tonumber(max) and tonumber(max) > 0) and tonumber(max) or nil,
        (tonumber(chargeDuration) and tonumber(chargeDuration) > 0) and tonumber(chargeDuration) or effectiveCd
    )

    local hasCharges = ((tonumber(max) or 0) > 1) or (tonumber(inferredMaxCharges) or 0) > 1

    if hasCharges then
        local maxCharges = math.max(1, tonumber(max) or tonumber(inferredMaxCharges) or 1)
        local currentCharges = tonumber(cur)
        if currentCharges == nil then
            currentCharges = maxCharges
        end
        currentCharges = math.max(0, math.min(maxCharges, currentCharges))

        local chargeDur = tonumber(chargeDuration) or tonumber(inferredChargeDuration) or tonumber(effectiveCd) or 0
        chargeDur = math.max(0, chargeDur)

        if currentCharges < maxCharges and chargeDur > 0 then
            local chargeStartTime = tonumber(chargeStart) or now
            local missing = maxCharges - currentCharges
            local updatedEntry = self:SetActiveCooldown(ownName, sid, {
                startTime = chargeStartTime,
                duration = missing * chargeDur,
                spellEntry = spellEntry,
                currentCharges = currentCharges,
                maxCharges = maxCharges,
                chargeStart = chargeStartTime,
                chargeDuration = chargeDur,
            })
            self:RefreshCooldownExpiryTimer(ownName, sid, updatedEntry)
        else
            self:ClearActiveCooldown(ownName, sid)
        end
    else
        local cooldownStart, cooldownDuration = 0, 0
        if GetSpellCooldownInfo then
            cooldownStart, cooldownDuration = GetSpellCooldownInfo(sid)
        end
        cooldownStart = tonumber(cooldownStart) or 0
        cooldownDuration = tonumber(cooldownDuration) or 0
        local gcdStart, gcdDuration = 0, 0
        if GetGlobalCooldownInfo then
            gcdStart, gcdDuration = GetGlobalCooldownInfo()
        end
        gcdStart = tonumber(gcdStart) or 0
        gcdDuration = tonumber(gcdDuration) or 0
        local existingDuration = tonumber(existing and existing.duration) or 0
        local existingStart = tonumber(existing and existing.startTime) or now
        local existingRemaining = math.max(0, existingDuration - (now - existingStart))

        local isLikelyGlobalCooldown = cooldownDuration > 0
            and gcdDuration > 0
            and math.abs(cooldownDuration - gcdDuration) <= 0.15
            and (tonumber(effectiveCd) or 0) > (gcdDuration + 1.0)

        local isSuspiciousShortRefresh = cooldownDuration > 0
            and existingRemaining > 2.0
            and existingDuration > 2.0
            and cooldownDuration < math.max(2.0, existingDuration * 0.35)
            and cooldownDuration < math.max(2.0, (tonumber(effectiveCd) or 0) * 0.35)

        if isLikelyGlobalCooldown or isSuspiciousShortRefresh then
            self:DebugScoped(
                "verbose",
                "TrackedSpells",
                "Ignore suspicious refresh for %s: spellCD=%.3f gcd=%.3f existing=%.3f remaining=%.3f effective=%.3f",
                GetSpellDebugLabel and GetSpellDebugLabel(sid) or tostring(sid),
                cooldownDuration,
                gcdDuration,
                existingDuration,
                existingRemaining,
                tonumber(effectiveCd) or 0
            )
            return false
        end

        if cooldownDuration > 0 then
            local updatedEntry = self:SetActiveCooldown(ownName, sid, {
                startTime = cooldownStart,
                duration = cooldownDuration,
                spellEntry = spellEntry,
            })
            self:RefreshCooldownExpiryTimer(ownName, sid, updatedEntry)
        else
            self:ClearActiveCooldown(ownName, sid)
        end
    end

    local after = BuildCooldownStateFingerprint and BuildCooldownStateFingerprint(self:GetActiveCooldown(ownName, sid)) or "nil"
    return before ~= after
end

function HMGT:DidOwnInterruptSucceed(triggerSpellId, talents)
    local sid = tonumber(triggerSpellId)
    if not sid then return false end

    local spellEntry = HMGT_SpellData and HMGT_SpellData.InterruptLookup and HMGT_SpellData.InterruptLookup[sid]
    if not spellEntry then return false end
    sid = tonumber(spellEntry.spellId) or sid

    local observedDuration = 0
    if GetSpellCooldownInfo then
        local _, duration = GetSpellCooldownInfo(sid)
        observedDuration = duration
    end
    observedDuration = tonumber(observedDuration) or 0
    if observedDuration <= 0 then return false end

    local expectedDuration = HMGT_SpellData.GetEffectiveCooldown(spellEntry, talents)
    expectedDuration = tonumber(expectedDuration) or 0
    if expectedDuration <= 0 then return false end

    return observedDuration < (expectedDuration - 0.05)
end

function HMGT:HandleOwnCooldownReductionTrigger(triggerSpellId)
    local ownName = self:NormalizePlayerName(UnitName("player"))
    if not ownName then return end

    local pData = self.playerData[ownName]
    local classToken = pData and pData.class or select(2, UnitClass("player"))
    local specIndex = pData and pData.specIndex or GetSpecialization()
    local talents = pData and pData.talents or {}
    if not classToken or not specIndex then return end

    local reducers = HMGT_SpellData.GetCooldownReducersForCast(classToken, specIndex, triggerSpellId, talents)
    if not reducers or #reducers == 0 then return end

    local instantReducers = {}
    local observedInstantReducers = {}
    local successReducers = {}
    local observedSuccessReducers = {}
    for _, reducer in ipairs(reducers) do
        local observed = type(reducer.observe) == "table"
        if reducer.requireInterruptSuccess then
            if observed then
                observedSuccessReducers[#observedSuccessReducers + 1] = reducer
            else
                successReducers[#successReducers + 1] = reducer
            end
        else
            if observed then
                observedInstantReducers[#observedInstantReducers + 1] = reducer
            else
                instantReducers[#instantReducers + 1] = reducer
            end
        end
    end

    local castTs = GetServerTime()
    if #instantReducers > 0 and ApplyOwnCooldownReducers then
        ApplyOwnCooldownReducers(self, ownName, triggerSpellId, instantReducers, castTs)
    end
    if #observedInstantReducers > 0 and ApplyObservedCooldownReducers then
        ApplyObservedCooldownReducers(self, ownName, observedInstantReducers)
    end

    if #successReducers > 0 or #observedSuccessReducers > 0 then
        local function ApplySuccessReducers()
            if not self:DidOwnInterruptSucceed(triggerSpellId, talents) then
                return false
            end
            if #successReducers > 0 and ApplyOwnCooldownReducers then
                ApplyOwnCooldownReducers(self, ownName, triggerSpellId, successReducers, castTs)
            end
            if #observedSuccessReducers > 0 and ApplyObservedCooldownReducers then
                ApplyObservedCooldownReducers(self, ownName, observedSuccessReducers)
            end
            return true
        end

        if not ApplySuccessReducers() then
            C_Timer.After(0.12, function()
                if not self or not self.playerData or not self.playerData[ownName] then
                    return
                end
                ApplySuccessReducers()
            end)
        end
    end
end

function HMGT:HandleRemoteSpellCast(playerName, spellId, castTimestamp, curCharges, maxCharges, chargeRemaining, chargeDuration)
    local spellEntry = HMGT_SpellData.InterruptLookup[spellId]
                    or HMGT_SpellData.CooldownLookup[spellId]
    if not spellEntry then return end
    spellId = tonumber(spellEntry.spellId) or spellId
    if self:IsAvailabilitySpell(spellEntry) then return end

    local pData = self.playerData[playerName]
    local talents = pData and pData.talents or {}
    local effectiveCd = HMGT_SpellData.GetEffectiveCooldown(spellEntry, talents)

    castTimestamp = tonumber(castTimestamp) or GetServerTime()
    local existingEntry = self:GetActiveCooldown(playerName, spellId)
    if (tonumber(maxCharges) or 0) <= 0 and existingEntry and existingEntry.lastCastTimestamp then
        local prevTs = tonumber(existingEntry.lastCastTimestamp) or 0
        if math.abs(prevTs - castTimestamp) <= 1 then
            return
        end
    end
    local now = GetTime()
    local elapsed = math.max(0, GetServerTime() - castTimestamp)

    local incomingCur = tonumber(curCharges) or 0
    local incomingMax = tonumber(maxCharges) or 0
    local incomingChargeRemaining = tonumber(chargeRemaining) or 0
    local incomingChargeDuration = tonumber(chargeDuration) or 0

    local inferredMaxCharges, inferredChargeDuration = HMGT_SpellData.GetEffectiveChargeInfo(
        spellEntry,
        talents,
        (incomingMax > 0) and incomingMax or nil,
        (incomingChargeDuration > 0) and incomingChargeDuration or effectiveCd
    )
    local hasCharges = (incomingMax > 1) or (tonumber(inferredMaxCharges) or 0) > 1

    local currentCharges = 0
    local maxChargeCount = 0
    local chargeDur = 0
    local nextChargeRemaining = 0
    local chargeStartTime = nil
    local startTime, duration, expiresIn

    if hasCharges then
        maxChargeCount = math.max(1, (incomingMax > 0 and incomingMax) or tonumber(inferredMaxCharges) or 1)
        chargeDur = tonumber(incomingChargeDuration) or tonumber(inferredChargeDuration) or tonumber(effectiveCd) or 0
        chargeDur = math.max(0, chargeDur)
        if chargeDur <= 0 then
            chargeDur = math.max(0, tonumber(effectiveCd) or 0)
        end

        if incomingMax > 0 then
            currentCharges = math.max(0, math.min(maxChargeCount, incomingCur))
            nextChargeRemaining = math.max(0, math.min(chargeDur, incomingChargeRemaining - elapsed))
            if currentCharges < maxChargeCount and chargeDur > 0 then
                chargeStartTime = now - math.max(0, chargeDur - nextChargeRemaining)
            end
        else
            local existing = self:GetActiveCooldown(playerName, spellId)
            if existing and (tonumber(existing.maxCharges) or 0) == maxChargeCount then
                self:ResolveChargeState(existing, now)
                local prevCharges = tonumber(existing.currentCharges) or maxChargeCount
                local prevStart = tonumber(existing.chargeStart)
                local prevDur = tonumber(existing.chargeDuration) or chargeDur
                if prevDur > 0 then
                    chargeDur = prevDur
                end

                currentCharges = math.max(0, prevCharges - 1)
                if currentCharges < maxChargeCount and chargeDur > 0 then
                    if prevCharges >= maxChargeCount then
                        chargeStartTime = now
                    else
                        chargeStartTime = prevStart or now
                    end
                    nextChargeRemaining = math.max(0, chargeDur - (now - chargeStartTime))
                end
            else
                currentCharges = math.max(0, maxChargeCount - 1)
                if currentCharges < maxChargeCount and chargeDur > 0 then
                    chargeStartTime = now
                    nextChargeRemaining = chargeDur
                end
            end
        end

        if currentCharges >= maxChargeCount and maxChargeCount > 0 then
            currentCharges = math.max(0, maxChargeCount - 1)
            if chargeDur > 0 then
                chargeStartTime = now
                nextChargeRemaining = chargeDur
            end
        end

        if currentCharges < maxChargeCount and chargeDur > 0 then
            chargeStartTime = chargeStartTime or now
            local missing = maxChargeCount - currentCharges
            startTime = chargeStartTime
            duration = missing * chargeDur
            expiresIn = math.max(0, duration - (now - startTime))
        else
            startTime = now
            duration = 0
            expiresIn = 0
        end
    else
        local remaining = effectiveCd - elapsed
        if remaining <= 0 then return end
        startTime = now - elapsed
        duration = effectiveCd
        expiresIn = remaining
    end

    self:Debug(
        "verbose",
        "HandleRemoteSpellCast name=%s spellId=%s elapsed=%.2f expiresIn=%.2f charges=%s/%s",
        tostring(playerName),
        tostring(spellId),
        tonumber(elapsed) or 0,
        tonumber(expiresIn) or 0,
        hasCharges and tostring(currentCharges) or "-",
        hasCharges and tostring(maxChargeCount) or "-"
    )

    self._cdNonce = (self._cdNonce or 0) + 1
    local nonce = self._cdNonce

    self:SetActiveCooldown(playerName, spellId, {
        startTime = startTime,
        duration = duration,
        spellEntry = spellEntry,
        currentCharges = hasCharges and currentCharges or nil,
        maxCharges = hasCharges and maxChargeCount or nil,
        chargeStart = hasCharges and chargeStartTime or nil,
        chargeDuration = hasCharges and chargeDur or nil,
        lastCastTimestamp = castTimestamp,
        _nonce = nonce,
    })

    self:LogTrackedSpellCast(playerName, spellEntry, {
        cooldown = effectiveCd,
        currentCharges = hasCharges and currentCharges or nil,
        maxCharges = hasCharges and maxChargeCount or nil,
        chargeCooldown = hasCharges and chargeDur or nil,
    })

    if expiresIn > 0 then
        self:ScheduleTimer(function()
            local current = self:GetActiveCooldown(playerName, spellId)
            if current and current._nonce == nonce then
                self:ClearActiveCooldown(playerName, spellId)
                self:TriggerTrackerUpdate()
            end
        end, expiresIn)
    end

    self:TriggerTrackerUpdate()
end