--[[
	Description: Loot only what you want and keep your precious bag slots free of trash.
	Author: Eliote
--]]

local ADDON_NAME, PRIVATE_TABLE = ...
local GetAddOnMetadata = C_AddOns and C_AddOns.GetAddOnMetadata or GetAddOnMetadata
local MOD_VERSION = GetAddOnMetadata(ADDON_NAME, "Version")

---@class AutoLooter
AutoLooter = LibStub("AceAddon-3.0"):NewAddon("AutoLooter", "AceEvent-3.0")
local events = LibStub("CallbackHandler-1.0"):New(AutoLooter)

local L = LibStub("AceLocale-3.0"):GetLocale("AutoLooter")

---@type Util
local Util = PRIVATE_TABLE.Util
local Color = PRIVATE_TABLE.Color

AutoLooter.GetNumLootItems = GetNumLootItems
AutoLooter.GetLootSlotType = GetLootSlotType
AutoLooter.GetLootSlotInfo = GetLootSlotInfo
AutoLooter.GetLootSlotLink = GetLootSlotLink
AutoLooter.LootSlot = LootSlot
AutoLooter.ConfirmLootSlot = ConfirmLootSlot

local chatCache = {}
local function findChatFrame(name)
	if (name == -1) then return DEFAULT_CHAT_FRAME end

	local chat = chatCache[name]
	if chat then return chat end

	local found
	for i = 1, NUM_CHAT_WINDOWS do
		local chatName = GetChatWindowInfo(i)
		if chatName then
			local chatFrame = getglobal("ChatFrame" .. i)
			chatCache[chatName] = chatFrame

			if chatName == name then
				found = chatFrame
			end
		end
	end

	return found
end

local function filterChatFrame(namesMap)
	local frames = {}
	for k, selected in pairs(namesMap) do
		if selected then
			local frame = findChatFrame(k)
			if frame then
				table.insert(frames, frame)
			end
		end
	end
	return frames
end

function AutoLooter.print(...)
	local chatFrames = filterChatFrame(AutoLooter.db.char.chatFrameNames)
	if #chatFrames == 0 then return end

	local out = ""

	for i = 1, select("#", ...) do
		local s = tostring(select(i, ...))

		out = out .. s
	end

	for i, chatFrame in ipairs(chatFrames) do
		chatFrame:AddMessage(Color.WHITE .. "[" .. Color.BLUE .. "AL" .. Color.WHITE .. "]|r|r|r " .. out)
	end
end

local function LoadState()
	if (AutoLooter.db.profile.enable) then
		AutoLooter:Enable()
	else
		AutoLooter:Disable()
	end
end

function AutoLooter.Toggle(bool)
	AutoLooter.db.profile.enable = Util.GetBoolean(bool, not AutoLooter.db.profile.enable)
	LoadState()
end

function AutoLooter:ReloadOptions(onInit)
	if onInit == "OnInitialization" then
		self:SetEnabledState(self.db.profile.enable)
	else
		LoadState()
	end
end

function AutoLooter:CreateProfile()
	self.options = {
		type = "group",
		name = "AutoLooter",
		args = {
			config = {
				type = "execute",
				name = L["Show/Hide UI"],
				func = function() LibStub("AceConfigDialog-3.0"):Open(ADDON_NAME) end,
				hidden = true
			},
			general = {
				order = 0,
				name = L["General"],
				type = "group",
				args = {}
			}
		}
	}

	self.options.args.profile = LibStub("AceDBOptions-3.0"):GetOptionsTable(self.db)
	self.options.args.profile.order = -1

	for _, module in AutoLooter:IterateModules() do
		if (module.GetOptions) then
			Util.mergeTable(self.options.args, module:GetOptions())
		end
	end

	local AceConfig = LibStub("AceConfig-3.0")
	AceConfig:RegisterOptionsTable("AutoLooter", self.options, { "al", "autolooter", "atl" })

	local AceDialog = LibStub("AceConfigDialog-3.0")
	self.optionsFrame = AceDialog:AddToBlizOptions("AutoLooter")
end

local function registerResetCacheOn(module, func)
	local original = module[func]
	module[func] = function(...)
		AutoLooter:ResetModulesCache()
		if original then return original(...) end
	end
end

function AutoLooter:OnInitialize()
	local isDragonFlight = (LE_EXPANSION_LEVEL_CURRENT >= 9) -- DRAGONFLIGHT = 9
	local defaults = {
		profile = {
			items = {},
			ignore = {},
			alert = {},
			enable = true,
			printout = true,
			printoutIgnored = false,
			printType = false,
			lootAll = false,
			lootQuest = true,
			close = false,
			rarity = 2,
			price = 40000,
			alertSound = "Sound/creature/Murloc/mMurlocAggroOld.ogg",
			typeTable = {}, --CreateAHTable(),
			ignoreGreys = false,
			autoConfirmRoll = false,
			minimap = { hide = false },
			ignoreBop = false,
			printoutReason = true,
			lootEarly = not isDragonFlight,
			printLoginCommands = false,
		},
		char = {
			chatFrameNames = { [-1] = true }
		}
	}
	self.db = LibStub("AceDB-3.0"):New("AutoLooterDB", defaults, "Default")
	self.db.RegisterCallback(self, "OnProfileChanged", "ReloadOptions")
	self.db.RegisterCallback(self, "OnProfileCopied", "ReloadOptions")
	self.db.RegisterCallback(self, "OnProfileReset", "ReloadOptions")

	for _, module in self:IterateModules() do
		registerResetCacheOn(module, "OnEnable")
		registerResetCacheOn(module, "OnDisable")
	end

	AutoLooter:ReloadOptions("OnInitialization")
	AutoLooter:CreateProfile()

	if (self.db.profile.printCommandsAtLogin) then
		DEFAULT_CHAT_FRAME:AddMessage(Color.BLUE .. "AutoLooter" .. Color.WHITE .. " || v" .. MOD_VERSION .. " || " .. Color.YELLOW .. "/autolooter /al /atl|r")
	end
end

function AutoLooter:OnEnable()
	AutoLooter:RegisterEvent("LOOT_READY")
	AutoLooter:RegisterEvent("LOOT_OPENED")
	events:Fire("OnEnable")
end

function AutoLooter:OnDisable()
	events:Fire("OnDisable")
end

local function Loot(index, itemName, itemLink)
	AutoLooter.LootSlot(index)
	AutoLooter.ConfirmLootSlot(index) -- In case it's a Bind on Pickup
	events:Fire("OnLoot", index)
end

local trim = Util.trim
local function PrintReason(reason, contents)
	local items = ""
	for _, content in pairs(contents) do
		items = items .. content .. " "
	end

	if (not reason or reason == "") then
		AutoLooter.print(trim(items))
	else
		AutoLooter.print(reason, "|r: ", trim(items))
	end
end

local modulesCache = {}
local resetMessage = {}
---@return fun(tbl: table<string, AutoLooterModule>):string, AutoLooterModule
function AutoLooter:SortedModulesIterator(lootOnly)
	local cacheKey = lootOnly and "lootOnlyTrue" or "lootOnlyFalse"
	if modulesCache[cacheKey] ~= nil then
		modulesCache[cacheKey](resetMessage)
		return modulesCache[cacheKey]
	end

	local function sort(o1, o2)
		return (self:GetModule(o1).priority or 99999999) < (self:GetModule(o2).priority or 99999999)
	end
	local exclusion = function(key, module)
		if module:IsEnabled() then
			if lootOnly then return module.CanLoot end
			return true
		end
	end
	local function iterator() return self:IterateModules() end

	modulesCache[cacheKey] = Util.orderedPairs(iterator, sort, exclusion, resetMessage)
	return modulesCache[cacheKey]
end

function AutoLooter:ResetModulesCache()
	modulesCache = {}
end

function AutoLooter:LOOT_OPENED(...)
	if (not self.db.profile.lootEarly) then
		self:Loot(...)
	end
end

function AutoLooter:LOOT_READY(...)
	if (self.db.profile.lootEarly) then
		self:Loot(...)
	end
end

function AutoLooter:Loot(_, autoloot)
	if (autoloot) then return end

	events:Fire("OnLootReadyStart")

	local reasonMap = {}
	local printReason = self.db.profile.printout

	for nIndex = 1, self.GetNumLootItems() do
		local slotType = self.GetLootSlotType(nIndex) or 0
		if (slotType > 0) then
			-- if the item is gone, there's nothing we can do.
			local icon, title, quantity, currencyID, rarity, locked, isQuestItem, questId, isActive = self.GetLootSlotInfo(nIndex)
			quantity = quantity or 0
			local itemLink = self.GetLootSlotLink(nIndex)

			for _, module in self:SortedModulesIterator(true) do
				local loot, reason, reasonContent, forceBreak = module.CanLoot(
						itemLink,
						icon,
						title,
						quantity,
						currencyID,
						rarity,
						locked,
						isQuestItem,
						questId,
						isActive
				)

				if (printReason and reason and reasonContent and reasonContent ~= "") then
					-- ignored items will still print the reason
					if (loot and not self.db.profile.printoutReason and quantity > 0) then
						reason = ""
					end

					if (loot or self.db.profile.printoutIgnored) then
						reasonMap[reason] = reasonMap[reason] or {}
						table.insert(reasonMap[reason], reasonContent)
					end
				end

				if loot then
					Loot(nIndex, title, itemLink)
					break
				end

				if forceBreak then break end -- ignore other modules and go to the next item
			end
		end
	end

	for _, module in self:SortedModulesIterator() do
		if (module.Finish) then module.Finish() end
	end

	for reason, contents in pairs(reasonMap) do
		PrintReason(reason, contents)
	end

	events:Fire("OnLootReadyFinish")
end