--[[
AdiBags - Adirelle's bag addon.
Copyright 2010-2012 Adirelle (adirelle@gmail.com)
All rights reserved.
--]]

local addonName, addon = ...
local L = addon.L

--<GLOBALS
local _G = _G
local ADDON_LOAD_FAILED = _G.ADDON_LOAD_FAILED
local BANK_CONTAINER = _G.BANK_CONTAINER
local CloseWindows = _G.CloseWindows
local CreateFrame = _G.CreateFrame
local format = _G.format
local GetCVarBool = _G.GetCVarBool
local geterrorhandler = _G.geterrorhandler
local InterfaceOptions_AddCategory = _G.InterfaceOptions_AddCategory
local LoadAddOn = _G.LoadAddOn
local next = _G.next
local NUM_BANKGENERIC_SLOTS = _G.NUM_BANKGENERIC_SLOTS
local pairs = _G.pairs
local pcall = _G.pcall
local print = _G.print
local strmatch = _G.strmatch
local strsplit = _G.strsplit
local type = _G.type
local unpack = _G.unpack
--GLOBALS>

LibStub('AceAddon-3.0'):NewAddon(addon, addonName, 'AceEvent-3.0', 'AceBucket-3.0', 'AceHook-3.0', 'AceConsole-3.0')
--[===[@debug@
_G[addonName] = addon
--@end-debug@]===]

--------------------------------------------------------------------------------
-- Debug stuff
--------------------------------------------------------------------------------

--[===[@alpha@
if AdiDebug then
	AdiDebug:Embed(addon, addonName)
else
--@end-alpha@]===]
	function addon.Debug() end
--[===[@alpha@
end
--@end-alpha@]===]

--[===[@debug@
local function DebugTable(t, prevKey)
	local k, v = next(t, prevKey)
	if k ~= nil then
		return k, v, DebugTable(t, k)
	end
end
--@end-debug@]===]

--------------------------------------------------------------------------------
-- Addon initialization and enabling
--------------------------------------------------------------------------------

addon:SetDefaultModuleState(false)

function addon:OnInitialize()
	local bfd = self:GetFontDefaults(GameFontHighlightLarge)
	bfd.r, bfd.g, bfd.b = 1, 1, 1
	self.DEFAULT_SETTINGS.profile.bagFont = bfd
	self.DEFAULT_SETTINGS.profile.sectionFont = self:GetFontDefaults(GameFontNormalLeft)

	self.db = LibStub('AceDB-3.0'):New(addonName.."DB", self.DEFAULT_SETTINGS, true)
	self.db.RegisterCallback(self, "OnProfileChanged")
	self.db.RegisterCallback(self, "OnProfileCopied", "OnProfileChanged")
	self.db.RegisterCallback(self, "OnProfileReset", "Reconfigure")

	self.bagFont = self:CreateFont(addonName.."BagFont", GameFontHighlightLarge, function() return self.db.profile.bagFont end)
	self.sectionFont = self:CreateFont(addonName.."SectionFont", GameFontNormalLeft, function() return self.db.profile.sectionFont end)

	self.itemParentFrames = {}

	self:InitializeFilters()
	self:CreateBagAnchor()

	self:SetEnabledState(false)

	-- Persistant handlers
	self.RegisterBucketMessage(addonName, 'AdiBags_ConfigChanged', 0.2, function(...) addon:ConfigChanged(...) end)
	self.RegisterEvent(addonName, 'PLAYER_ENTERING_WORLD', function() if self.db.profile.enabled then self:Enable() end end)

	self:UpgradeProfile()

	-- ProfessionVault support
	local PV  =_G.ProfessionsVault
	if PV then
		self:Debug('Installing ProfessionsVault callback')
		self.RegisterMessage(PV, "AdiBags_UpdateButton", function(_, button)
			PV:SlotColor(button.itemId, button.IconTexture)
		end)
	end

	self:RegisterChatCommand("adibags", function(cmd)
		addon:OpenOptions(strsplit(' ', cmd or ""))
	end, true)

	-- Just a warning
	--[===[@alpha@
	if geterrorhandler() == _G._ERRORMESSAGE and not GetCVarBool("scriptErrors") then
		print('|cffffee00', L["Warning: you are using an alpha or beta version of AdiBags without displaying Lua errors. If anything goes wrong, AdiBags (or any other addon causing some error) will simply stop working for apparently no reason. Please either enable the display of Lua errors or install an error handler addon like BugSack or Swatter."], '|r')
	end
	--@end-alpha@]===]

	self:Debug('Initialized')
end

function addon:OnEnable()

	self.globalLock = false

	self:RegisterEvent('BAG_UPDATE')
	self:RegisterBucketEvent('PLAYERBANKSLOTS_CHANGED', 0, 'BankUpdated')

	self:RegisterEvent('PLAYER_LEAVING_WORLD', 'Disable')

	self:RegisterMessage('AdiBags_BagOpened', 'LayoutBags')
	self:RegisterMessage('AdiBags_BagClosed', 'LayoutBags')

	self:RawHook("OpenAllBags", true)
	self:RawHook("CloseAllBags", true)
	self:RawHook("ToggleAllBags", true)
	self:RawHook("ToggleBackpack", true)
	self:RawHook("ToggleBag", true)
	self:RawHook("OpenBackpack", true)
	self:RawHook("CloseBackpack", true)
	self:RawHook('CloseSpecialWindows', true)

	-- Track most windows involving items
	self:RegisterEvent('BANKFRAME_OPENED', 'UpdateInteractingWindow')
	self:RegisterEvent('BANKFRAME_CLOSED', 'UpdateInteractingWindow')
	self:RegisterEvent('MAIL_SHOW', 'UpdateInteractingWindow')
	self:RegisterEvent('MAIL_CLOSED', 'UpdateInteractingWindow')
	self:RegisterEvent('MERCHANT_SHOW', 'UpdateInteractingWindow')
	self:RegisterEvent('MERCHANT_CLOSED', 'UpdateInteractingWindow')
	self:RegisterEvent('AUCTION_HOUSE_SHOW', 'UpdateInteractingWindow')
	self:RegisterEvent('AUCTION_HOUSE_CLOSED', 'UpdateInteractingWindow')
	self:RegisterEvent('TRADE_SHOW', 'UpdateInteractingWindow')
	self:RegisterEvent('TRADE_CLOSED', 'UpdateInteractingWindow')
	self:RegisterEvent('GUILDBANKFRAME_OPENED', 'UpdateInteractingWindow')
	self:RegisterEvent('GUILDBANKFRAME_CLOSED', 'UpdateInteractingWindow')

	self:SetSortingOrder(self.db.profile.sortingOrder)

	for name, module in self:IterateModules() do
		if module.isFilter then
			module:SetEnabledState(self.db.profile.filters[module.moduleName])
		elseif module.isBag then
			module:SetEnabledState(self.db.profile.bags[module.bagName])
		else
			module:SetEnabledState(self.db.profile.modules[module.moduleName])
		end
	end

	self.bagFont:ApplySettings()
	self.sectionFont:ApplySettings()
	self:UpdatePositionMode()

	self:Debug('Enabled')
end

function addon:OnDisable()
	self.anchor:Hide()
	self:CloseAllBags()
	self:Debug('Disabled')
end

function addon:Reconfigure()
	self.holdYourBreath = true -- prevent tons*$% of useless updates
	self:Disable()
	self:Enable()
	self.holdYourBreath = nil
	self:UpdateFilters()
end

function addon:OnProfileChanged()
	self:UpgradeProfile()
	return self:Reconfigure()
end

function addon:UpgradeProfile()
	local profile = self.db.profile

	-- Convert old ordering setting
	if profile.laxOrdering == true then
		profile.laxOrdering = 1
	end

	-- Convert old anchor settings
	local oldData = profile.anchor
	if oldData then
		local scale = oldData.scale or 0.8
		profile.scale = scale

		local newData = profile.positions.anchor
		newData.point = oldData.pointFrom or "BOTTOMRIGHT"
		newData.xOffset = (oldData.xOffset or -32) / scale
		newData.yOffset = (oldData.yOffset or 200) / scale

		profile.anchor = nil
	end

	-- Convert old "notWhenTrading" setting
	if profile.virtualStacks.notWhenTrading == true then
		profile.virtualStacks.notWhenTrading = 3
	end

	-- Convert old "rowWidth"
	if type(profile.rowWidth) == "number" then
		local rowWidth = profile.rowWidth
		profile.rowWidth = { Bank = rowWidth, Backpack = rowWidth }
	end

	-- Convert old "backgroundColors"
	if type(profile.backgroundColors) == "table" then
		profile.skin.BackpackColor = profile.backgroundColors.Backpack
		profile.skin.BankColor = profile.backgroundColors.Bank
		profile.backgroundColors = nil
	end
	
	-- Convert old font settings
	if type(profile.skin) == "table" then
		local skin = profile.skin
		if type(skin.font) == "string" then
			profile.bagFont.name = skin.font
			profile.sectionFont.name = skin.font
			skin.font = nil
		end
		if skin.fontSize then
			profile.bagFont.size = skin.fontSize
			profile.sectionFont.size = skin.fontSize - 4
			skin.fontSize = nil
		end
		if skin.fontBagColor then
			local bagFont = profile.bagFont
			bagFont.r, bagFont.g, bagFont.r = unpack(skin.fontBagColor)
			skin.fontBagColor = nil
		end
		if skin.fontSectionColor then
			local sectionFont = profile.sectionFont
			sectionFont.r, sectionFont.g, sectionFont.b = unpack(skin.fontSectionColor)
			skin.fontSectionColor = nil
		end
	end

end

--------------------------------------------------------------------------------
-- Option addon handling
--------------------------------------------------------------------------------

do
	local configAddonName = "AdiBags_Config"
	local why = '???'
	local function CouldNotLoad()
		print("|cffff0000AdiBags:", format(ADDON_LOAD_FAILED, configAddonName, why), "|r")
	end
	function addon:OpenOptions(...)
		self.OpenOptions = CouldNotLoad
		local loaded, reason = LoadAddOn(configAddonName)
		if not loaded then
			why = _G['ADDON_'..reason]
		end
		addon:OpenOptions(...)
	end
end

do
	-- Create the Blizzard addon option frame
	local panel = CreateFrame("Frame", addonName.."BlizzOptions")
	panel.name = addonName
	InterfaceOptions_AddCategory(panel)

	local fs = panel:CreateFontString(nil, "OVERLAY", "GameFontNormalLarge")
	fs:SetPoint("TOPLEFT", 10, -15)
	fs:SetPoint("BOTTOMRIGHT", panel, "TOPRIGHT", 10, -45)
	fs:SetJustifyH("LEFT")
	fs:SetJustifyV("TOP")
	fs:SetText(addonName)

	local button = CreateFrame("Button", nil, panel, "UIPanelButtonTemplate")
	button:SetText(L['Configure'])
	button:SetWidth(128)
	button:SetPoint("TOPLEFT", 10, -48)
	button:SetScript('OnClick', function()
		while CloseWindows() do end
		return addon:OpenOptions()
	end)

end

--------------------------------------------------------------------------------
-- Module prototype
--------------------------------------------------------------------------------

local moduleProto = {
	Debug = addon.Debug,
	OpenOptions = function(self)
		return addon:OpenOptions("modules", self.moduleName)
	end,
}
addon.moduleProto = moduleProto
addon:SetDefaultModulePrototype(moduleProto)

--------------------------------------------------------------------------------
-- Event handlers
--------------------------------------------------------------------------------

function addon:BAG_UPDATE(event, bag)
	self:SendMessage('AdiBags_BagUpdated', bag)
end

function addon:BankUpdated(slots)
	-- Wrap several PLAYERBANKSLOTS_CHANGED into one AdiBags_BagUpdated message
	for slot in pairs(slots) do
		if slot > 0 and slot <= NUM_BANKGENERIC_SLOTS then
			self:SendMessage('AdiBags_BagUpdated', BANK_CONTAINER)
			return
		end
	end
end

function addon:ConfigChanged(vars)
	--[===[@debug@
	self:Debug('ConfigChanged', DebugTable(vars))
	--@end-debug@]===]
	if vars.enabled then
		if self.db.profile.enabled then
			self:Enable()
		else
			self:Disable()
		end
		return
	elseif not self:IsEnabled() then
		return
	elseif vars.filter then
		return self:SendMessage('AdiBags_FiltersChanged')
	else
		for name in pairs(vars) do
			if strmatch(name, 'virtualStacks') then
				return self:SendMessage('AdiBags_FiltersChanged')
			elseif strmatch(name, 'bags%.') then
				local _, bagName = strsplit('.', name)
				local bag = self:GetModule(bagName)
				local enabled = self.db.profile.bags[bagName]
				if enabled and not bag:IsEnabled() then
					bag:Enable()
				elseif not enabled and bag:IsEnabled() then
					bag:Disable()
				end
			elseif strmatch(name, 'rowWidth') then
				return self:SendMessage('AdiBags_LayoutChanged')
			elseif strmatch(name, '^skin%.font') then
				return self:UpdateFonts()
			end
		end
	end
	if vars.sortingOrder then
		return self:SetSortingOrder(self.db.profile.sortingOrder)
	elseif vars.maxHeight or vars.laxOrdering then
		return self:SendMessage('AdiBags_LayoutChanged')
	elseif vars.scale then
		return self:LayoutBags()
	elseif vars.positionMode then
		return self:UpdatePositionMode()
	else
		self:SendMessage('AdiBags_UpdateAllButtons')
	end
end

function addon:SetGlobalLock(locked)
	locked = not not locked
	if locked ~= self.globalLock then
		self.globalLock = locked
		self:SendMessage('AdiBags_GlobalLockChanged', locked)
		if not locked then
			self:SendMessage('AdiBags_LayoutChanged')
		end
		return true
	end
end

--------------------------------------------------------------------------------
-- Track windows related to item interaction (merchant, mail, bank, ...)
--------------------------------------------------------------------------------

do
	local current
	function addon:UpdateInteractingWindow(event, ...)
		local new = strmatch(event, '^([_%w]+)_OPENED$') or strmatch(event, '^([_%w]+)_SHOW$')
		self:Debug('UpdateInteractingWindow', event, current, '=>', new, '|', ...)
		if new ~= current then
			local old = current
			current = new
			self.atBank = (current == "BANKFRAME")
			if self.db.profile.virtualStacks.notWhenTrading ~= 0 then
				self:SendMessage('AdiBags_FiltersChanged', true)
			end
			self:SendMessage('AdiBags_InteractingWindowChanged', new, old)
		end
	end

	function addon:GetInteractingWindow()
		return current
	end
end

--------------------------------------------------------------------------------
-- Virtual stacks
--------------------------------------------------------------------------------

function addon:ShouldStack(slotData)
	local conf = self.db.profile.virtualStacks
	if not slotData.link then
		return conf.freeSpace, "*Free*"
	end
	local window, unstack = self:GetInteractingWindow(), 0
	if window then
		unstack = conf.notWhenTrading
		if unstack >= 4 and window ~= "BANKFRAME" then
			return
		end
	end
	local maxStack = slotData.maxStack or 1
	if maxStack > 1 then
		if conf.stackable then
			if (slotData.count or 1) == maxStack then
				return true, slotData.itemId
			elseif unstack < 3 then
				return conf.incomplete, slotData.itemId
			end
		end
	elseif conf.others and unstack < 2 then
		return true, self.GetDistinctItemID(slotData.link)
	end
end

--------------------------------------------------------------------------------
-- Skin-related methods
--------------------------------------------------------------------------------

local LSM = LibStub('LibSharedMedia-3.0')

function addon:GetContainerSkin(containerName)
	local skin = self.db.profile.skin
	local r, g, b, a = unpack(skin[containerName..'Color'], 1, 4)
	local backdrop = addon.BACKDROP
	backdrop.bgFile = LSM:Fetch(LSM.MediaType.BACKGROUND, skin.background)
	backdrop.edgeFile = LSM:Fetch(LSM.MediaType.BORDER, skin.border)
	backdrop.edgeSize = skin.borderWidth
	backdrop.insets.left = skin.insets
	backdrop.insets.right = skin.insets
	backdrop.insets.top = skin.insets
	backdrop.insets.bottom = skin.insets
	return backdrop, r, g, b, a
end
