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

HMGT.TrackerState = HMGT.TrackerState or {}

function HMGT:EnsureTrackerStateTables()
    self.playerData = self.playerData or {}
    self.activeCDs = self.activeCDs or {}
    self.availabilityStates = self.availabilityStates or {}
    self.localSpellStateRevisions = self.localSpellStateRevisions or {}
    self.remoteSpellStateRevisions = self.remoteSpellStateRevisions or {}
    self.knownChargeInfo = self.knownChargeInfo or {}
end

function HMGT:ResetTrackerState()
    self.playerData = {}
    self.activeCDs = {}
    self.availabilityStates = {}
    self.localSpellStateRevisions = {}
    self.remoteSpellStateRevisions = {}
    self.knownChargeInfo = {}
end

function HMGT:GetPlayerCooldownMap(playerName, create)
    local normalizedName = self:NormalizePlayerName(playerName)
    if not normalizedName then
        return nil
    end
    self:EnsureTrackerStateTables()
    if create then
        self.activeCDs[normalizedName] = self.activeCDs[normalizedName] or {}
    end
    return self.activeCDs[normalizedName]
end

function HMGT:GetAvailabilityStateMap(playerName, create)
    local normalizedName = self:NormalizePlayerName(playerName)
    if not normalizedName then
        return nil
    end
    self:EnsureTrackerStateTables()
    if create then
        self.availabilityStates[normalizedName] = self.availabilityStates[normalizedName] or {}
    end
    return self.availabilityStates[normalizedName]
end

function HMGT:GetAvailabilityStateEntry(playerName, spellId)
    local sid = tonumber(spellId)
    local states = self:GetAvailabilityStateMap(playerName, false)
    return states and sid and states[sid] or nil
end

function HMGT:SetAvailabilityStateEntry(playerName, spellId, stateData)
    local sid = tonumber(spellId)
    if not sid or sid <= 0 or type(stateData) ~= "table" then
        return nil
    end
    local states = self:GetAvailabilityStateMap(playerName, true)
    if not states then
        return nil
    end
    states[sid] = stateData
    return stateData
end

function HMGT:ClearAvailabilityState(playerName, spellId)
    local sid = tonumber(spellId)
    local normalizedName = self:NormalizePlayerName(playerName)
    if not normalizedName or not sid or sid <= 0 then
        return false
    end

    local states = self.availabilityStates and self.availabilityStates[normalizedName]
    if not states or not states[sid] then
        return false
    end

    states[sid] = nil
    if not next(states) then
        self.availabilityStates[normalizedName] = nil
    end
    return true
end

function HMGT:GetActiveCooldown(playerName, spellId)
    local sid = tonumber(spellId)
    local cooldowns = self:GetPlayerCooldownMap(playerName, false)
    return cooldowns and sid and cooldowns[sid] or nil
end

function HMGT:SetActiveCooldown(playerName, spellId, cdData)
    local sid = tonumber(spellId)
    if not sid or sid <= 0 or type(cdData) ~= "table" then
        return nil
    end
    local cooldowns = self:GetPlayerCooldownMap(playerName, true)
    if not cooldowns then
        return nil
    end
    cooldowns[sid] = cdData
    return cdData
end

function HMGT:ClearActiveCooldown(playerName, spellId)
    local sid = tonumber(spellId)
    local normalizedName = self:NormalizePlayerName(playerName)
    if not normalizedName or not sid or sid <= 0 then
        return false
    end

    local cooldowns = self.activeCDs and self.activeCDs[normalizedName]
    if not cooldowns or not cooldowns[sid] then
        return false
    end

    cooldowns[sid] = nil
    if not next(cooldowns) then
        self.activeCDs[normalizedName] = nil
    end
    return true
end

function HMGT:ClearPlayerCooldowns(playerName)
    local normalizedName = self:NormalizePlayerName(playerName)
    if not normalizedName then
        return false
    end
    if self.activeCDs and self.activeCDs[normalizedName] then
        self.activeCDs[normalizedName] = nil
        return true
    end
    return false
end

function HMGT:GetLocalSpellStateRevision(spellId)
    local sid = tonumber(spellId)
    if not sid or sid <= 0 then
        return 0
    end
    self:EnsureTrackerStateTables()
    return tonumber(self.localSpellStateRevisions[sid]) or 0
end

function HMGT:EnsureLocalSpellStateRevision(spellId)
    local sid = tonumber(spellId)
    if not sid or sid <= 0 then
        return 0
    end
    self:EnsureTrackerStateTables()
    local current = tonumber(self.localSpellStateRevisions[sid]) or 0
    if current <= 0 then
        current = 1
        self.localSpellStateRevisions[sid] = current
    end
    return current
end

function HMGT:NextLocalSpellStateRevision(spellId)
    local sid = tonumber(spellId)
    if not sid or sid <= 0 then
        return 0
    end
    self:EnsureTrackerStateTables()
    local nextRevision = (tonumber(self.localSpellStateRevisions[sid]) or 0) + 1
    self.localSpellStateRevisions[sid] = nextRevision
    return nextRevision
end

function HMGT:GetRemoteSpellStateRevision(playerName, spellId)
    local normalizedName = self:NormalizePlayerName(playerName)
    local sid = tonumber(spellId)
    local bySpell = normalizedName and self.remoteSpellStateRevisions[normalizedName]
    return tonumber(bySpell and bySpell[sid]) or 0
end

function HMGT:SetRemoteSpellStateRevision(playerName, spellId, revision)
    local normalizedName = self:NormalizePlayerName(playerName)
    local sid = tonumber(spellId)
    local rev = tonumber(revision) or 0
    if not normalizedName or not sid or sid <= 0 or rev <= 0 then
        return
    end
    self:EnsureTrackerStateTables()
    self.remoteSpellStateRevisions[normalizedName] = self.remoteSpellStateRevisions[normalizedName] or {}
    self.remoteSpellStateRevisions[normalizedName][sid] = rev
end

function HMGT:ClearRemoteSpellStateRevisions(playerName)
    local normalizedName = self:NormalizePlayerName(playerName)
    if not normalizedName then
        return false
    end
    if self.remoteSpellStateRevisions and self.remoteSpellStateRevisions[normalizedName] then
        self.remoteSpellStateRevisions[normalizedName] = nil
        return true
    end
    return false
end

function HMGT:ClearTrackerStateForPlayer(playerName)
    local normalizedName = self:NormalizePlayerName(playerName)
    if not normalizedName then
        return false
    end

    local changed = false
    if self.activeCDs and self.activeCDs[normalizedName] then
        self.activeCDs[normalizedName] = nil
        changed = true
    end
    if self.availabilityStates and self.availabilityStates[normalizedName] then
        self.availabilityStates[normalizedName] = nil
        changed = true
    end
    if self.remoteSpellStateRevisions and self.remoteSpellStateRevisions[normalizedName] then
        self.remoteSpellStateRevisions[normalizedName] = nil
        changed = true
    end

    return changed
end

function HMGT:StoreKnownChargeInfo(spellId, maxCharges, chargeDuration)
    local sid = tonumber(spellId)
    local maxCount = tonumber(maxCharges)
    if not sid or sid <= 0 or not maxCount or maxCount <= 1 then
        return
    end

    self:EnsureTrackerStateTables()
    self.knownChargeInfo[sid] = {
        maxCharges = math.max(1, math.floor(maxCount + 0.5)),
        chargeDuration = math.max(0, tonumber(chargeDuration) or 0),
        updatedAt = GetTime(),
    }
end

function HMGT:GetKnownChargeInfo(spellEntry, talents, spellId, fallbackChargeDuration)
    local sid = tonumber(spellId or (spellEntry and spellEntry.spellId))
    if not sid or sid <= 0 then
        return 0, 0
    end

    local cached = self.knownChargeInfo and self.knownChargeInfo[sid]
    local cachedMax = tonumber(cached and cached.maxCharges) or 0
    local cachedDuration = tonumber(cached and cached.chargeDuration) or 0

    local inferredMax, inferredDuration = HMGT_SpellData.GetEffectiveChargeInfo(
        spellEntry,
        talents or {},
        (cachedMax > 0) and cachedMax or nil,
        (cachedDuration > 0) and cachedDuration or fallbackChargeDuration
    )

    local maxCharges = math.max(cachedMax, tonumber(inferredMax) or 0)
    local chargeDuration = math.max(
        tonumber(inferredDuration) or 0,
        cachedDuration,
        tonumber(fallbackChargeDuration) or 0
    )

    if maxCharges > 1 then
        self:StoreKnownChargeInfo(sid, maxCharges, chargeDuration)
    end

    return maxCharges, chargeDuration
end

function HMGT:PruneAvailabilityStates(playerName, knownSpells)
    local normalizedName = self:NormalizePlayerName(playerName)
    local states = normalizedName and self.availabilityStates[normalizedName]
    if not states or type(knownSpells) ~= "table" then
        return false
    end

    local changed = false
    for sid in pairs(states) do
        if not knownSpells[tonumber(sid)] then
            states[sid] = nil
            changed = true
        end
    end

    if not next(states) then
        self.availabilityStates[normalizedName] = nil
    end
    return changed
end

function HMGT:ResolveChargeState(cdData, now)
    if type(cdData) ~= "table" then
        return 0, 0, 0, 0
    end

    now = tonumber(now) or GetTime()
    local maxCharges = math.max(0, tonumber(cdData.maxCharges) or 0)
    local currentCharges = math.max(0, tonumber(cdData.currentCharges) or 0)
    local chargeDuration = math.max(0, tonumber(cdData.chargeDuration) or 0)
    local chargeStart = tonumber(cdData.chargeStart)

    if maxCharges <= 0 then
        return 0, chargeDuration, currentCharges, maxCharges
    end
    if currentCharges >= maxCharges or chargeDuration <= 0 or not chargeStart then
        return 0, chargeDuration, math.min(currentCharges, maxCharges), maxCharges
    end

    local elapsed = math.max(0, now - chargeStart)
    local gainedCharges = math.floor(elapsed / chargeDuration)
    local remaining = chargeDuration - (elapsed % chargeDuration)

    if gainedCharges > 0 then
        currentCharges = math.min(maxCharges, currentCharges + gainedCharges)
        if currentCharges >= maxCharges then
            currentCharges = maxCharges
            chargeStart = nil
            remaining = 0
        else
            chargeStart = now - (elapsed % chargeDuration)
        end

        cdData.currentCharges = currentCharges
        cdData.chargeStart = chargeStart
        if currentCharges >= maxCharges then
            cdData.startTime = now
            cdData.duration = 0
        else
            local missing = maxCharges - currentCharges
            cdData.startTime = chargeStart
            cdData.duration = missing * chargeDuration
        end
    end

    if currentCharges >= maxCharges then
        return 0, chargeDuration, currentCharges, maxCharges
    end
    return math.max(0, remaining), chargeDuration, currentCharges, maxCharges
end

function HMGT:RefreshCooldownExpiryTimer(playerName, spellId, cdData)
    if not cdData then return 0 end
    local now = GetTime()
    local duration = tonumber(cdData.duration) or 0
    local startTime = tonumber(cdData.startTime) or now
    local expiresIn = math.max(0, duration - (now - startTime))

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

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

function HMGT:CleanupStaleCooldowns()
    local now = GetTime()
    local ownName = self:NormalizePlayerName(UnitName("player"))
    local removed = 0
    for playerName, spells in pairs(self.activeCDs) do
        for spellId, cdInfo in pairs(spells) do
            local duration = tonumber(cdInfo.duration) or 0
            local startTime = tonumber(cdInfo.startTime) or now
            local rem = duration - (now - startTime)
            local hasCharges = (tonumber(cdInfo.maxCharges) or 0) > 0
            local currentCharges = tonumber(cdInfo.currentCharges) or 0
            local maxCharges = tonumber(cdInfo.maxCharges) or 0
            if hasCharges then
                local _, _, cur, max = self:ResolveChargeState(cdInfo, now)
                currentCharges = cur
                maxCharges = max
            end
            local shouldDrop = false
            if hasCharges then
                if currentCharges >= maxCharges then
                    shouldDrop = true
                elseif (tonumber(cdInfo.chargeDuration) or 0) <= 0 and rem <= -2 then
                    shouldDrop = true
                end
            elseif rem <= -2 then
                shouldDrop = true
            end
            if shouldDrop then
                spells[spellId] = nil
                if playerName == ownName then
                    self:PublishOwnSpellState(spellId)
                end
                removed = removed + 1
            end
        end
        if not next(spells) then
            self.activeCDs[playerName] = nil
        end
    end
    if removed > 0 then
        self:Debug("verbose", "CleanupStaleCooldowns removed=%d", removed)
    end
end