-- Modules/Tracker/TrackerManager.lua
-- Generic tracker manager for category-driven tracker frames.

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

local Manager = {}
HMGT.TrackerManager = Manager

Manager.frames = Manager.frames or {}
Manager.perPlayerFrames = Manager.perPlayerFrames or {}
Manager.activeOrders = Manager.activeOrders or {}
Manager.unitByPlayer = Manager.unitByPlayer or {}
Manager.anchorLayoutSignatures = Manager.anchorLayoutSignatures or {}
Manager.nextAnchorRetryAt = Manager.nextAnchorRetryAt or {}
Manager.enabled = false
Manager.visualTicker = nil
Manager.lastEntryCount = 0
Manager._shared = Manager._shared or {}
Manager._trackerCache = Manager._trackerCache or nil
Manager._trackerCacheSignature = Manager._trackerCacheSignature or nil
Manager._displaySignatures = Manager._displaySignatures or {}
Manager._layoutDirty = Manager._layoutDirty == true

local function GetTrackerFrameKey(trackerId)
    return "tracker:" .. tostring(tonumber(trackerId) or 0)
end

local function GetTrackerFrameName(trackerId)
    return "GenericTracker_" .. tostring(tonumber(trackerId) or 0)
end

local function GetTrackerPlayerFrameName(trackerId, playerName)
    local token = tostring(playerName or "Unknown"):gsub("[^%w_]", "_")
    return string.format("%s_%s", GetTrackerFrameName(trackerId), token)
end

local function ShortName(name)
    if not name then
        return ""
    end
    local short = name:match("^[^-]+")
    return short or name
end

local function IsUsableAnchorFrame(frame)
    return frame
        and frame.IsObjectType
        and (frame:IsObjectType("Frame") or frame:IsObjectType("Button"))
end

local function GetFrameUnit(frame)
    if not frame then
        return nil
    end
    local unit = frame.unit
    if not unit and frame.GetAttribute then
        unit = frame:GetAttribute("unit")
    end
    return unit
end

local function FrameMatchesUnit(frame, unitId)
    if not IsUsableAnchorFrame(frame) then
        return false
    end
    if not unitId then
        return true
    end
    return GetFrameUnit(frame) == unitId
end

local PLAYER_FRAME_CANDIDATES = {
    "PlayerFrame",
    "ElvUF_Player",
    "NephUI_PlayerFrame",
    "NephUIPlayerFrame",
    "oUF_NephUI_Player",
    "SUFUnitplayer",
}

local PARTY_FRAME_PATTERNS = {
    "PartyMemberFrame%d",
    "CompactPartyFrameMember%d",
    "ElvUF_PartyGroup1UnitButton%d",
    "ElvUF_PartyUnitButton%d",
    "NephUI_PartyUnitButton%d",
    "NephUI_PartyFrame%d",
    "NephUIPartyFrame%d",
    "oUF_NephUI_PartyUnitButton%d",
    "SUFUnitparty%d",
}

local unitFrameCache = {}

local function BuildAnchorLayoutSignature(settings, ordered, unitByPlayer)
    local parts = {
        settings.attachToPartyFrame == true and "attach" or "stack",
        tostring(settings.partyAttachSide or "RIGHT"),
        tostring(tonumber(settings.partyAttachOffsetX) or 8),
        tostring(tonumber(settings.partyAttachOffsetY) or 0),
        tostring(settings.showBar and "bar" or "icon"),
        tostring(settings.growDirection or "DOWN"),
        tostring(settings.width or 250),
        tostring(settings.barHeight or 20),
        tostring(settings.iconSize or 32),
        tostring(settings.iconCols or 6),
        tostring(settings.barSpacing or 2),
        tostring(settings.locked),
        tostring(settings.anchorTo or "UIParent"),
        tostring(settings.anchorPoint or "TOPLEFT"),
        tostring(settings.anchorRelPoint or "TOPLEFT"),
        tostring(settings.anchorX or settings.posX or 0),
        tostring(settings.anchorY or settings.posY or 0),
    }

    for _, playerName in ipairs(ordered or {}) do
        parts[#parts + 1] = tostring(playerName)
        parts[#parts + 1] = tostring(unitByPlayer and unitByPlayer[playerName] or "")
    end

    return table.concat(parts, "|")
end

local function IsGroupTracker(tracker)
    return type(tracker) == "table" and tracker.trackerType == "group"
end

local function ResolveNamedUnitFrame(unitId)
    if unitId == "player" then
        for _, frameName in ipairs(PLAYER_FRAME_CANDIDATES) do
            local frame = _G[frameName]
            if FrameMatchesUnit(frame, unitId) or (frameName == "PlayerFrame" and IsUsableAnchorFrame(frame)) then
                return frame
            end
        end
        return nil
    end

    local idx = type(unitId) == "string" and unitId:match("^party(%d+)$")
    if not idx then
        return nil
    end

    idx = tonumber(idx)
    for _, pattern in ipairs(PARTY_FRAME_PATTERNS) do
        local frame = _G[pattern:format(idx)]
        if FrameMatchesUnit(frame, unitId) then
            return frame
        end
    end

    return nil
end

local function ScanUnitFrame(unitId)
    local frame = EnumerateFrames()
    local scanned = 0
    while frame and scanned < 8000 do
        if IsUsableAnchorFrame(frame) and GetFrameUnit(frame) == unitId then
            HMGT:Debug("verbose", "TrackerAttach scan unit=%s scanned=%d found=true", tostring(unitId), scanned)
            return frame
        end
        scanned = scanned + 1
        frame = EnumerateFrames(frame)
    end
    HMGT:Debug("verbose", "TrackerAttach scan unit=%s scanned=%d found=false", tostring(unitId), scanned)
    return nil
end

local function ResolveUnitAnchorFrame(unitId)
    if not unitId then
        return nil
    end

    local now = GetTime()
    local cached = unitFrameCache[unitId]
    if cached and now < (cached.expires or 0) then
        if cached.frame and cached.frame:IsShown() then
            return cached.frame
        end
        return nil
    end

    local frame = ResolveNamedUnitFrame(unitId)
    if not frame then
        frame = ScanUnitFrame(unitId)
    end

    local expiresIn = 1.0
    if frame and frame:IsShown() then
        expiresIn = 10.0
    end
    unitFrameCache[unitId] = {
        frame = frame,
        expires = now + expiresIn,
    }

    if frame and frame:IsShown() then
        return frame
    end
    return nil
end

local function GetTrackerLabel(tracker)
    if type(tracker) ~= "table" then
        return "Tracker"
    end

    local name = tostring(tracker.name or ""):gsub("^%s+", ""):gsub("%s+$", "")
    local trackerId = tonumber(tracker.id) or 0
    if name ~= "" then
        return name
    end
    if trackerId > 0 then
        return string.format("Tracker %d", trackerId)
    end
    return "Tracker"
end

local function SortTrackers(trackers)
    table.sort(trackers, function(a, b)
        local aId = tonumber(a and a.id) or 0
        local bId = tonumber(b and b.id) or 0
        if aId ~= bId then
            return aId < bId
        end
        return tostring(a and a.name or "") < tostring(b and b.name or "")
    end)
    return trackers
end

local function BuildTrackerCacheSignature(trackers)
    local parts = { tostring(#(trackers or {})) }
    for index, tracker in ipairs(trackers or {}) do
        parts[#parts + 1] = tostring(index)
        parts[#parts + 1] = tostring(tonumber(tracker and tracker.id) or 0)
        parts[#parts + 1] = tostring(tracker and tracker.trackerType or "normal")
        parts[#parts + 1] = tostring(tracker and tracker.enabled)
        parts[#parts + 1] = tostring(tracker and tracker.name or "")
    end
    return table.concat(parts, "|")
end

local function BuildNormalDisplaySignature(frameShown, entries)
    local parts = { frameShown and "1" or "0", tostring(#(entries or {})) }
    for index, entry in ipairs(entries or {}) do
        parts[#parts + 1] = tostring(index)
        parts[#parts + 1] = tostring(entry and entry.playerName or "")
        parts[#parts + 1] = tostring(entry and entry.spellEntry and entry.spellEntry.spellId or 0)
    end
    return table.concat(parts, "|")
end

local function BuildGroupDisplaySignature(order, byPlayer)
    local parts = { tostring(#(order or {})) }
    for _, playerName in ipairs(order or {}) do
        parts[#parts + 1] = tostring(playerName)
        parts[#parts + 1] = tostring(#((byPlayer and byPlayer[playerName]) or {}))
    end
    return table.concat(parts, "|")
end

Manager._shared.GetTrackerFrameKey = GetTrackerFrameKey
Manager._shared.GetTrackerFrameName = GetTrackerFrameName
Manager._shared.GetTrackerPlayerFrameName = GetTrackerPlayerFrameName
Manager._shared.ShortName = ShortName
Manager._shared.BuildAnchorLayoutSignature = BuildAnchorLayoutSignature
Manager._shared.IsGroupTracker = IsGroupTracker
Manager._shared.ResolveUnitAnchorFrame = ResolveUnitAnchorFrame
Manager._shared.GetTrackerLabel = GetTrackerLabel
Manager._shared.BuildGroupDisplaySignature = BuildGroupDisplaySignature

function Manager:GetTrackers()
    local profile = HMGT and HMGT.db and HMGT.db.profile
    local trackers = profile and profile.trackers or {}
    local signature = BuildTrackerCacheSignature(trackers)
    if self._trackerCache and self._trackerCacheSignature == signature then
        return self._trackerCache
    end
    local result = {}
    for _, tracker in ipairs(trackers) do
        result[#result + 1] = tracker
    end
    self._trackerCache = SortTrackers(result)
    self._trackerCacheSignature = signature
    return self._trackerCache
end

function Manager:GetTrackerFrameKey(tracker)
    if type(tracker) == "table" then
        return GetTrackerFrameKey(tracker.id)
    end
    return GetTrackerFrameKey(tracker)
end

function Manager:MarkTrackersDirty()
    self._trackerCache = nil
    self._trackerCacheSignature = nil
    self._layoutDirty = true
end

function Manager:MarkLayoutDirty()
    self._layoutDirty = true
end

function Manager:EnsureFrame(tracker)
    local frameKey = GetTrackerFrameKey(tracker.id)
    local frame = self.frames[frameKey]
    if not frame then
        frame = HMGT.TrackerFrame:CreateTrackerFrame(GetTrackerFrameName(tracker.id), tracker)
        frame._hmgtTrackerId = tonumber(tracker.id) or 0
        self.frames[frameKey] = frame
    end

    frame._settings = tracker
    HMGT.TrackerFrame:SetTitle(frame, GetTrackerLabel(tracker))
    HMGT.TrackerFrame:SetLocked(frame, tracker.locked)
    return frame
end

function Manager:GetAnchorFrame(tracker)
    if type(tracker) ~= "table" then
        return nil
    end

    if IsGroupTracker(tracker) then
        local frameKey = GetTrackerFrameKey(tracker.id)
        local order = self.activeOrders[frameKey] or {}
        local frames = self.perPlayerFrames[frameKey] or {}
        if order[1] and frames[order[1]] and frames[order[1]]:IsShown() then
            return frames[order[1]]
        end
    end

    return self:EnsureFrame(tracker)
end

function Manager:StopVisualTicker()
    if self.visualTicker then
        self.visualTicker:Cancel()
        self.visualTicker = nil
    end
end

function Manager:SetVisualTickerEnabled(enabled)
    if enabled then
        if not self.visualTicker then
            self.visualTicker = C_Timer.NewTicker(0.1, function()
                self:RefreshVisibleVisuals()
            end)
        end
    else
        self:StopVisualTicker()
    end
end

function Manager:RefreshAnchors(force)
    for _, tracker in ipairs(self:GetTrackers()) do
        local frameKey = GetTrackerFrameKey(tracker.id)
        if IsGroupTracker(tracker) then
            local anchorFrame = self.frames[frameKey]
            if anchorFrame and not anchorFrame._hmgtDragging then
                HMGT.TrackerFrame:ApplyAnchor(anchorFrame)
            end
            self:RefreshPerGroupAnchors(tracker, force)
        else
            local frame = self.frames[frameKey]
            if frame and (force or frame:IsShown()) then
                if not frame._hmgtDragging then
                    HMGT.TrackerFrame:ApplyAnchor(frame)
                end
                frame:EnableMouse(not tracker.locked)
            end
        end
    end
end

function Manager:InvalidateAnchorLayout()
    self.anchorLayoutSignatures = {}
    self.nextAnchorRetryAt = {}
    self:MarkLayoutDirty()
    self:RefreshAnchors(true)
end

function Manager:SetAllLocked(locked)
    for _, frame in pairs(self.frames) do
        HMGT.TrackerFrame:SetLocked(frame, locked)
    end
    for _, frameSet in pairs(self.perPlayerFrames) do
        for _, frame in pairs(frameSet) do
            HMGT.TrackerFrame:SetLocked(frame, locked)
        end
    end
end

function Manager:GetAnchorableFrames()
    local frames = {}
    for _, tracker in ipairs(self:GetTrackers()) do
        local anchorKey = HMGT.GetTrackerAnchorKey and HMGT:GetTrackerAnchorKey(tracker.id) or nil
        local frame = self:GetAnchorFrame(tracker)
        if anchorKey and frame then
            frames[anchorKey] = frame
        end
    end
    return frames
end

function Manager:Enable()
    self.enabled = true
    self:MarkTrackersDirty()
    self:UpdateDisplay()
end

function Manager:Disable()
    self.enabled = false
    self:StopVisualTicker()
    self._layoutDirty = true
    for _, frame in pairs(self.frames) do
        frame:Hide()
    end
    for frameKey in pairs(self.perPlayerFrames) do
        self:HidePlayerFrames(frameKey)
    end
end

function Manager:RefreshVisibleVisuals()
    if not self.enabled then
        self:StopVisualTicker()
        return
    end

    local shouldTick = false
    local needsFullRefresh = false
    local totalEntries = 0

    for _, tracker in ipairs(self:GetTrackers()) do
        local frameKey = GetTrackerFrameKey(tracker.id)
        if IsGroupTracker(tracker) then
            local currentOrder = self.activeOrders[frameKey] or {}
            if #currentOrder > 0 then
                local byPlayer, order, unitByPlayer, shouldShow = self:BuildEntriesByPlayerForTracker(tracker)
                if not shouldShow or #order ~= #currentOrder then
                    needsFullRefresh = true
                else
                    local byPlayerFiltered = {}
                    for index, playerName in ipairs(order) do
                        if playerName ~= currentOrder[index] then
                            needsFullRefresh = true
                            break
                        end
                        local entries = byPlayer[playerName] or {}
                        local tickThis = false
                        entries, tickThis = HMGT:FinalizeTrackerEntries(tracker, entries, tracker.trackerKey or nil)
                        if #entries == 0 then
                            needsFullRefresh = true
                            break
                        end
                        local frame = self.perPlayerFrames[frameKey] and self.perPlayerFrames[frameKey][playerName]
                        if not frame or not frame:IsShown() then
                            needsFullRefresh = true
                            break
                        end
                        HMGT.TrackerFrame:UpdateFrame(frame, entries, true)
                        totalEntries = totalEntries + #entries
                        byPlayerFiltered[playerName] = entries
                        if tickThis then
                            shouldTick = true
                        end
                    end
                    local newSignature = BuildGroupDisplaySignature(currentOrder, byPlayerFiltered)
                    if self._displaySignatures[frameKey] ~= newSignature then
                        needsFullRefresh = true
                    end
                end
            end
        else
                local frame = self.frames[frameKey]
                if frame and frame:IsShown() then
                    local entries, shouldShow = self:BuildEntriesForTracker(tracker)
                    if not shouldShow then
                        needsFullRefresh = true
                    else
                        local tickThis = false
                        entries, tickThis = HMGT:FinalizeTrackerEntries(tracker, entries, tracker.trackerKey or nil)
                        if #entries == 0 then
                            needsFullRefresh = true
                        else
                        HMGT.TrackerFrame:UpdateFrame(frame, entries, true)
                        totalEntries = totalEntries + #entries
                        local newSignature = BuildNormalDisplaySignature(true, entries)
                            if self._displaySignatures[frameKey] ~= newSignature then
                                needsFullRefresh = true
                            end
                            if tickThis then
                                shouldTick = true
                            end
                        end
                    end
                end
        end
    end

    self.lastEntryCount = totalEntries
    self:SetVisualTickerEnabled(shouldTick)
    if needsFullRefresh then
        HMGT:TriggerTrackerUpdate("layout")
    end
end

function Manager:UpdateDisplay()
    if not self.enabled then
        self:StopVisualTicker()
        return
    end

    local trackers = self:GetTrackers()
    local activeFrames = {}
    local shouldTick = false
    local totalEntries = 0
    local layoutDirty = self._layoutDirty == true

    for _, tracker in ipairs(trackers) do
        local frameKey = GetTrackerFrameKey(tracker.id)
        local frame = self:EnsureFrame(tracker)

        if IsGroupTracker(tracker) then
            frame:Hide()
            local shown, entryCount, trackerShouldTick = self:UpdatePerGroupMemberTracker(tracker)
            totalEntries = totalEntries + (entryCount or 0)
            if trackerShouldTick then
                shouldTick = true
            end
            if not shown then
                self:HidePlayerFrames(frameKey)
            end
        else
            self:HidePlayerFrames(frameKey)
            local entries, shouldShow = self:BuildEntriesForTracker(tracker)

            if shouldShow then
                local tickThis = false
                entries, tickThis = HMGT:FinalizeTrackerEntries(tracker, entries, tracker.trackerKey or nil)

                HMGT.TrackerFrame:UpdateFrame(frame, entries, true)
                frame:Show()
                frame:EnableMouse(not tracker.locked)
                activeFrames[frameKey] = true
                totalEntries = totalEntries + #entries
                local newSignature = BuildNormalDisplaySignature(true, entries)
                if self._displaySignatures[frameKey] ~= newSignature then
                    self._displaySignatures[frameKey] = newSignature
                    layoutDirty = true
                end

                if tickThis then
                    shouldTick = true
                end
            else
                frame:Hide()
                if self._displaySignatures[frameKey] ~= "0" then
                    self._displaySignatures[frameKey] = "0"
                    layoutDirty = true
                end
            end
        end
    end

    for frameKey, frame in pairs(self.frames) do
        if not activeFrames[frameKey] then
            if frame:IsShown() then
                layoutDirty = true
            end
            frame:Hide()
        end
    end

    self.lastEntryCount = totalEntries
    self:SetVisualTickerEnabled(shouldTick)
    if layoutDirty then
        self._layoutDirty = false
        self:RefreshAnchors()
    end
end