--[[	*** DataStore_Crafts ***
Written by : Thaoky, EU-Marécages de Zangar
June 23rd, 2009
--]]
if not DataStore then return end

local addonName = "DataStore_Crafts"

_G[addonName] = LibStub("AceAddon-3.0"):NewAddon(addonName, "AceConsole-3.0", "AceEvent-3.0", "AceComm-3.0", "AceSerializer-3.0", "AceTimer-3.0")

local addon = _G[addonName]

local THIS_ACCOUNT = "Default"
local commPrefix = "DS_Craft"
local L = LibStub("AceLocale-3.0"):GetLocale("DataStore_Crafts")
local PT = LibStub("LibPeriodicTable-3.1")

local MSG_SEND_LOGIN								= 1	-- Sends a login message, to request crafts to other players
local MSG_LOGIN_REPLY							= 2	-- ..reply
local MSG_SEND_PROFESSION						= 3	-- Sends a profession link, or profession id if no full link

local AddonDB_Defaults = {
	global = {
		Options = {
			BroadcastProfs = 1,					-- Broadcast professions at login or not
		},
		Guilds = {
			['*'] = {			-- ["Account.Realm.Name"] 
				Members = {
					['*'] = {				-- ["MemberName"] 
						lastUpdate = nil,
						Version = nil,
						Professions = {},		-- 3 profession links : [1] & [2] for the 2 primary professions, [3] for cooking ([4] for archaeology ? wait & see)
					}
				}
			},
		},
		Characters = {
			['*'] = {				-- ["Account.Realm.Name"] 
				lastUpdate = nil,
				Professions = {
					['*'] = {
						FullLink = nil,		-- Tradeskill link
						NumCrafts = 0,			-- total number of crafts for this tradeskill
						Crafts = { ['*'] = nil },
						Cooldowns = { ['*'] = nil },		-- list of active cooldowns
					}
				},
			}
		}
	}
}

local SPELL_ID_ALCHEMY = 2259
local SPELL_ID_BLACKSMITHING = 3100
local SPELL_ID_ENCHANTING = 7411
local SPELL_ID_ENGINEERING = 4036
local SPELL_ID_INSCRIPTION = 45357
local SPELL_ID_JEWELCRAFTING = 25229
local SPELL_ID_LEATHERWORKING = 2108
local SPELL_ID_TAILORING = 3908
local SPELL_ID_SKINNING = 8613
local SPELL_ID_MINING = 2575
local SPELL_ID_HERBALISM = 13614
local SPELL_ID_SMELTING = 2656
local SPELL_ID_COOKING = 2550
local SPELL_ID_FIRSTAID = 3273
local SPELL_ID_FISHING = 7733

local ProfessionSpellID = {
	-- GetSpellInfo with this value will return localized spell name
	["Alchemy"] = SPELL_ID_ALCHEMY,
	["Blacksmithing"] = SPELL_ID_BLACKSMITHING,
	["Enchanting"] = SPELL_ID_ENCHANTING,
	["Engineering"] = SPELL_ID_ENGINEERING,
	["Inscription"] = SPELL_ID_INSCRIPTION,
	["Jewelcrafting"] = SPELL_ID_JEWELCRAFTING,
	["Leatherworking"] = SPELL_ID_LEATHERWORKING,
	["Tailoring"] = SPELL_ID_TAILORING,
	["Skinning"] = SPELL_ID_SKINNING,
	["Mining"] = SPELL_ID_MINING,
	["Herbalism"] = SPELL_ID_HERBALISM,
	["Smelting"] = SPELL_ID_SMELTING,

	["Cooking"] = SPELL_ID_COOKING,
	["First Aid"] = SPELL_ID_FIRSTAID,
	["Fishing"] = SPELL_ID_FISHING,
}

-- *** Utility functions ***
local function GetOption(option)
	return addon.db.global.Options[option]
end

local function GetProfessionID(profession)
	-- profession = localized profession name "Cooking" or "Cuisine", "Alchemy"...
	-- note: we're not using a reverse lookup table because of the localization issue.
	
	if ProfessionSpellID[profession] then
		return ProfessionSpellID[profession]
	end

	for _, id in pairs( ProfessionSpellID ) do
		if profession == GetSpellInfo(id) then		-- profession found ?
			ProfessionSpellID[profession] = id		-- cache the result to speed up future searches
			return id
		end
	end
end

local function GetThisGuild()
	local guild = GetGuildInfo("player")
	if guild then 
		local key = format("%s.%s.%s", THIS_ACCOUNT, GetRealmName(), guild)
		return addon.db.global.Guilds[key]
	end
end

local function GetVersion()
	local _, version = GetBuildInfo()
	return tonumber(version)
end

local function SaveVersion(sender, version)
	local thisGuild = GetThisGuild()
	if thisGuild and sender and version then
		thisGuild.Members[sender].Version = version
	end
end

local function GuildBroadcast(messageType, ...)
	local serializedData = addon:Serialize(messageType, ...)
	addon:SendCommMessage(commPrefix, serializedData, "GUILD")
end

local function GuildWhisper(player, messageType, ...)
	if DataStore:IsGuildMemberOnline(player) then
		local serializedData = addon:Serialize(messageType, ...)
		addon:SendCommMessage(commPrefix, serializedData, "WHISPER", player)
	end
end

local professionQueue		-- queue containing the professions to send to guildmates
local professionTimer		-- timer used to control the pace at which professions are place on comm channels.

local function SendProfession()
	if #professionQueue == 0 then					-- nothing left in the queue ? cancel the timer & exit
		addon:CancelTimer(professionTimer)
		professionTimer = nil
		return
	end
	
	-- send the last profession found in the queue, then remove it 
	local profession = professionQueue[#professionQueue]		-- last element
	local alt = profession[1]
	local data = profession[2]
	local index = profession[3]
	local recipient = profession[4]
--	DEFAULT_CHAT_FRAME:AddMessage(format("sending %s, %s to %s (size : %d)", alt, index, recipient or "guild", #professionQueue ))
	
	if profession[4] then		-- recipient found ? 
		GuildWhisper(recipient, MSG_SEND_PROFESSION, alt, data, index)
	else
		GuildBroadcast(MSG_SEND_PROFESSION, alt, data, index)
	end
	
	table.remove(professionQueue)
end

local function QueueCharacterProfessions(character, recipient)
	local index = 1
	local _, _, alt = strsplit(".", character)

	for profName, profession in pairs(addon.db.global.Characters[character].Professions) do
		local spellID = GetProfessionID(profName) or 0
		local data = profession.FullLink or spellID

		if profession.isPrimary then
			table.insert(professionQueue, { alt, data, index, recipient })
			index = index + 1
		elseif profession.isSecondary then
			if profName == GetSpellInfo(SPELL_ID_COOKING) then
				table.insert(professionQueue, { alt, data, 3, recipient })			--				index = 3
			end
		end
	end
end

local function SendAllProfessions(alts, recipient)
	if GetOption("BroadcastProfs") == 0 then
		return
	end

	professionQueue = professionQueue or {}
	
	-- sends the professions of the current character + his alts
	local character = DataStore:GetCharacter()	-- this character
	QueueCharacterProfessions(character, recipient)
	
	if strlen(alts) > 0 then
		for _, name in pairs( { strsplit("|", alts) }) do	-- then all his alts
			character = DataStore:GetCharacter(name)
			if character then
				QueueCharacterProfessions(character, recipient)
			end
		end
	end
	
	-- reuse current timer if already available (may be the case if 2 players connect simultaneously)
	professionTimer = professionTimer or addon:ScheduleRepeatingTimer(SendProfession, 0.5)		-- send 1 profession every half-second, max 15 seconds for 30 professions on a realm
end

local function SaveProfession(sender, alt, data, index)
	local thisGuild = GetThisGuild()
	if thisGuild and sender then
		local version = thisGuild.Members[sender].Version
		local member = thisGuild.Members[alt]
		
		member.Version = version
		member.Professions[index] = data
		member.lastUpdate = time()
	end
	addon:SendMessage("DATASTORE_GUILD_PROFESSION_RECEIVED", sender, alt, data, index)
end

local function ClearExpiredProfessions()
	-- this function will clear all the guild profession links that were saved with a build number anterior to the current one (they're invalid after a patch anyway)
	
	local thisGuild = GetThisGuild()
	if not thisGuild then return end
		
	local version = GetVersion()
	
	for name, member in pairs(thisGuild.Members) do
		if member.Version ~= version then
			thisGuild.Members[name] = nil		-- clear this member's entry if version is outdated
		end
	end
end

local function LocalizeProfessionSpellIDs()
	-- this function adds localized entries in the ProfessionSpellID table
	
	local localizedSpells = {}		-- avoid infinite loop by storing in a temp table first
	local localizedName
	for englishName, spellID in pairs(ProfessionSpellID) do
		localizedName = GetSpellInfo(spellID)
		localizedSpells[localizedName] = spellID
	end
	
	for name, id in pairs(localizedSpells) do
		ProfessionSpellID[name] = id
	end
end

-- *** Scanning functions ***

local selectedTradeSkillIndex
local subClasses, subClassID
local invSlots, invSlotID
local haveMats

local function GetSubClassID()
	-- The purpose of this function is to get the subClassID in a UI independant way
	-- ie: without relying on UIDropDownMenu_GetSelectedID(TradeSkillSubClassDropDown), which uses a hardcoded frame name.
	
	if GetTradeSkillSubClassFilter(0) then		-- if "All Subclasses" is selected, GetTradeSkillSubClassFilter() will return 1 for all indexes, including 0
		return 1				-- thus return 1 as selected id	(as would be returned by UIDropDownMenu_GetSelectedID(TradeSkillSubClassDropDown))
	end

	local filter
	for i = 1, #subClasses do
	   filter = GetTradeSkillSubClassFilter(i)
	   if filter then
	      return i+1			-- ex: 3rd element of the subClasses array, but 4th in the dropdown due to "All Subclasses", so return i+1
	   end
	end
end

local function GetInvSlotID()
	-- The purpose of this function is to get the invSlotID in a UI independant way	(same as GetSubClassID)
	-- ie: without relying on UIDropDownMenu_GetSelectedID(TradeSkillInvSlotDropDown), which uses a hardcoded frame name.

	if GetTradeSkillInvSlotFilter(0) then		-- if "All Slots" is selected, GetTradeSkillInvSlotFilter() will return 1 for all indexes, including 0
		return 1				-- thus return 1 as selected id	(as would be returned by  UIDropDownMenu_GetSelectedID(TradeSkillInvSlotDropDown))
	end

	local filter
	for i = 1, #invSlots do
	   filter = GetTradeSkillInvSlotFilter(i)
	   if filter then
	      return i+1			-- ex: 3rd element of the invSlots array, but 4th in the dropdown due to "All Slots", so return i+1
	   end
	end
end

local function SaveActiveFilters()
	selectedTradeSkillIndex = GetTradeSkillSelectionIndex()
	
	subClasses = { GetTradeSkillSubClasses() }
	invSlots = { GetTradeSkillInvSlots() }
	subClassID = GetSubClassID()
	invSlotID = GetInvSlotID()
	
	-- Subclasses
	SetTradeSkillSubClassFilter(0, 1, 1)	-- this checks "All subclasses"
	if TradeSkillSubClassDropDown then
		UIDropDownMenu_SetSelectedID(TradeSkillSubClassDropDown, 1)
	end
	
	-- Inventory slots
	SetTradeSkillInvSlotFilter(0, 1, 1)		-- this checks "All slots"
	if TradeSkillInvSlotDropDown then
		UIDropDownMenu_SetSelectedID(TradeSkillInvSlotDropDown, 1)
	end
	
	-- Have Materials
	if TradeSkillFrameAvailableFilterCheckButton then
		haveMats = TradeSkillFrameAvailableFilterCheckButton:GetChecked()	-- nil or true
		TradeSkillFrameAvailableFilterCheckButton:SetChecked(false)
	end
	TradeSkillOnlyShowMakeable(false)
end

local function RestoreActiveFilters()
	-- Subclasses
	SetTradeSkillSubClassFilter(subClassID-1, 1, 1)	-- this checks the previously checked value
	
	local frame = TradeSkillSubClassDropDown
	if frame then	-- other addons might nil this frame (delayed load, etc..), so secure DDM calls
		local text = (subClassID == 1) and ALL_SUBCLASSES or subClasses[subClassID-1]
		UIDropDownMenu_SetSelectedID(frame, subClassID)
		UIDropDownMenu_SetText(frame, text);
	end
	
	subClassID = nil
	wipe(subClasses)
	subClasses = nil
	
	-- Inventory slots
	invSlotID = invSlotID or 1
	SetTradeSkillInvSlotFilter(invSlotID-1, 1, 1)	-- this checks the previously checked value
	
	frame = TradeSkillInvSlotDropDown
	if frame then
		local text = (invSlotID == 1) and ALL_INVENTORY_SLOTS or invSlots[invSlotID-1]
		UIDropDownMenu_SetSelectedID(frame, invSlotID)
		UIDropDownMenu_SetText(frame, text);
	end
	
	invSlotID = nil
	wipe(invSlots)
	invSlots = nil
	
	-- Have Materials
	if TradeSkillFrameAvailableFilterCheckButton then
		TradeSkillFrameAvailableFilterCheckButton:SetChecked(haveMats or false)
	end
	TradeSkillOnlyShowMakeable(haveMats or false)
	haveMats = nil
	
	SelectTradeSkill(selectedTradeSkillIndex)
	selectedTradeSkillIndex = nil
end

local headersState = {}

local function SaveHeaders()
	local headerCount = 0		-- use a counter to avoid being bound to header names, which might not be unique.
	
	for i = GetNumTradeSkills(), 1, -1 do		-- 1st pass, expand all categories
		local _, skillType, _, isExpanded  = GetTradeSkillInfo(i)
		 if (skillType == "header") then
			headerCount = headerCount + 1
			if not isExpanded then
				ExpandTradeSkillSubClass(i)
				headersState[headerCount] = true
			end
		end
	end
end

local function RestoreHeaders()
	local headerCount = 0
	for i = GetNumTradeSkills(), 1, -1 do
		local _, skillType  = GetTradeSkillInfo(i)
		if (skillType == "header") then
			headerCount = headerCount + 1
			if headersState[headerCount] then
				CollapseTradeSkillSubClass(i)
			end
		end
	end
	wipe(headersState)
end

local function ScanCooldowns()
	local tradeskillName = GetTradeSkillLine()
	local char = addon.ThisCharacter
	local profession = char.Professions[tradeskillName]
	
	wipe(profession.Cooldowns)
	for i = 1, GetNumTradeSkills() do
		local skillName, skillType = GetTradeSkillInfo(i)
		
		if skillType ~= "header" then
			local cooldown = GetTradeSkillCooldown(i)
			if cooldown then
				table.insert(profession.Cooldowns, skillName .. "|" .. cooldown .. "|" .. time())
			end
		end
	end
end

local function ScanProfessionLinks()
	local char = addon.ThisCharacter
	
	if not char then return end

	for i = GetNumSkillLines(), 1, -1 do		-- 1st pass, expand all categories
		local _, isHeader = GetSkillLineInfo(i)
		if isHeader then
			ExpandSkillHeader(i)
		end
	end

	local category
	for i = 1, GetNumSkillLines() do
		local skillName, isHeader, _, skillRank, _, _, skillMaxRank = GetSkillLineInfo(i)
		
		if isHeader then
			category = skillName
		else
			if category and skillName then
				local field
				
				if category == L["Professions"] then
					field = "isPrimary"
				end
				
				if category == L["Secondary Skills"] then
					field = "isSecondary"
				end
				
				if field then
					char.Professions[skillName][field] = true
					-- should be nil anyway for fishing, mining, etc..
					local newLink = select(2, GetSpellLink(skillName))
					if newLink then		-- sometimes a nil value may be returned, so keep the old one if nil
						char.Professions[skillName].FullLink = newLink
					end
				end
			end
		end
	end
end

local SkillTypeToColor = {
	["header"] = 0,
	["optimal"] = 1,		-- orange
	["medium"] = 2,		-- yellow
	["easy"] = 3,			-- green
	["trivial"] = 4,		-- grey
}

local function ScanRecipes()
	local tradeskillName = GetTradeSkillLine()
	if not tradeskillName or tradeskillName == "UNKNOWN" then return end		-- may happen after a patch, or under extreme lag, so do not save anything to the db !

	local char = addon.ThisCharacter
	local profession = char.Professions[tradeskillName]
	local crafts = profession.Crafts
	wipe(crafts)

	profession.FullLink = select(2, GetSpellLink(tradeskillName))

	local NumCrafts = 0
	local color, craftInfo, link

	for i = 1, GetNumTradeSkills() do
		local skillName, skillType = GetTradeSkillInfo(i)
		color = SkillTypeToColor[skillType]
		
		if skillType == "header" then
			craftInfo = skillName or ""
		else
			link = GetTradeSkillRecipeLink(i)
			craftInfo = tonumber(link:match("enchant:(%d+)"))		-- this actually extracts the spellID
			NumCrafts = NumCrafts + 1
		end
		crafts[i] = color .. "|" .. craftInfo
	end
	
	profession.NumCrafts = NumCrafts
end

local function ScanTradeSkills()
	SaveActiveFilters()
	SaveHeaders()
	ScanRecipes()
	ScanCooldowns()
	RestoreHeaders()
	RestoreActiveFilters()
	
	addon.ThisCharacter.lastUpdate = time()
end

-- *** Event Handlers ***
local function OnPlayerAlive()
	ScanProfessionLinks()
end

local function OnTradeSkillClose()
	addon:UnregisterEvent("TRADE_SKILL_CLOSE")
	addon:UnregisterEvent("TRADE_SKILL_UPDATE")
	addon.isOpen = nil
end

local function OnTradeSkillShow()
	if IsTradeSkillLinked() then return end
	
	addon.isOpen = true
	addon:RegisterEvent("TRADE_SKILL_CLOSE", OnTradeSkillClose)
	ScanTradeSkills()
end

local function OnTradeSkillUpdate()
	-- The hook in DoTradeSkill will register this event so that we only update skills once.
	-- unregister it before calling the update, or the event will be called recursively (due to expand/collapse)
	addon:UnregisterEvent("TRADE_SKILL_UPDATE")
	ScanCooldowns()	-- only cooldowns need to be refreshed
end

-- this turns
--	"Your skill in %s has increased to %d."
-- into
--	"Your skill in (.+) has increased to (%d+)."
local arg1pattern, arg2pattern
if GetLocale() == "deDE" then		
	-- ERR_SKILL_UP_SI = "Eure Fertigkeit '%1$s' hat sich auf %2$d erhöht.";
	arg1pattern = "'%%1%$s'"
	arg2pattern = "%%2%$d"
else
	arg1pattern = "%%s"
	arg2pattern = "%%d"
end

local skillUpMsg = gsub(ERR_SKILL_UP_SI, arg1pattern, "(.+)")
skillUpMsg = gsub(skillUpMsg, arg2pattern, "(%%d+)")

local function OnChatMsgSkill(self, msg)
	if msg and addon.isOpen then	-- point gained while ts window is open ? rescan
		local skill = msg:match(skillUpMsg)
		if skill and skill == GetTradeSkillLine() then	-- if we gained a skill point in the currently opened profession pane, rescan
			ScanTradeSkills()
		end
	end
end


-- ** Mixins **
local function _GetProfession(character, name)
	return character.Professions[name]
end
	
local function _GetProfessions(character)
	return character.Professions
end

local function _GetProfessionInfo(profession)
	-- accepts either a pointer (type == table)to the profession table, as returned by addon:GetProfession()
	-- or a link (type == string)
	local link
	if type(profession) == "table" then
		link = profession.FullLink
	elseif type(profession) == "string" then
		link = profession
	end
	
	if link then
		local spellID, currentLevel, maxLevel = link:match("trade:(%d+):(%d+):(%d+):")
		return tonumber(currentLevel), tonumber(maxLevel), tonumber(spellID)
	end
end

local function _GetNumCraftLines(profession)
	return #profession.Crafts
end
	
local function _GetCraftLineInfo(profession, index)
	local craft = profession.Crafts[index]
	local color, info = strsplit("|", craft)
	
	color = tonumber(color)
	if color ~= 0 then			-- not a header ?
		info = tonumber(info)	-- it's a spellID, return a number
	end
	return (color == 0), color, info		-- 1st return value = isHeader
end

local function _GetCraftCooldownInfo(profession, index)
	local cooldown = profession.Cooldowns[index]
	local name, reset, lastCheck = strsplit("|", cooldown)
	
	reset = tonumber(reset)
	lastCheck = tonumber(lastCheck)
	local expiresIn = reset - (time() - lastCheck)
	
	return name, expiresIn, reset, lastCheck
end

local function _GetNumActiveCooldowns(profession)
	assert(type(profession) == "table")		-- this is the pointer to a profession table, obtained through addon:GetProfession()
	return #profession.Cooldowns
end

local function _ClearExpiredCooldowns(profession)
	assert(type(profession) == "table")		-- this is the pointer to a profession table, obtained through addon:GetProfession()
	
	for i = #profession.Cooldowns, 1, -1 do		-- from last to first, to avoid messing up indexes when removing entries
		local _, expiresIn = _GetCraftCooldownInfo(profession, i)
		if expiresIn <= 0 then		-- already expired ? remove it
			table.remove(profession.Cooldowns, i)
		end
	end
end

local function _GetCraftInfo(spellID)
	-- get the id of the item that can be crafted by this spellID
	local itemID = PT:ItemInSet("-"..spellID, "Tradeskill.RecipeLinks")
	local reagents
	
	if itemID then
		itemID = tonumber(itemID)

		-- ex: itemID 10046 is made with reagents : "2996x2;2318x1;2320x1"
		reagents = PT:ItemInSet(itemID, "TradeskillResultMats.Forward")

		if itemID == -spellID then		-- enchants that do not yield  an item will return this, ex: enchant 7420 will return itemID -7420
			itemID = nil
		end
	end
	
	return itemID, reagents
end

local function _GetCraftLevels(spellID)
	-- get the id of the item that can be crafted by this spellID
	local itemID = PT:ItemInSet("-"..spellID, "Tradeskill.RecipeLinks")
	
	if itemID then
		itemID = tonumber(itemID)

		-- ex: itemID 10046 : levels = "20/50/67/85", the item turns yellow at 50, green at 67, grey at 85
		local levels = PT:ItemInSet(itemID, "TradeskillLevels")

		if levels then
			local orange, yellow, green, grey = strsplit("/", levels)
			return tonumber(orange), tonumber(yellow), tonumber(green), tonumber(grey)
		end
	end
end

local function _GetNumRecipesByColor(profession)
	-- counts the number of orange, yellow, green and grey recipes.
	local counts = { 0, 0, 0, 0 }
	
	for i = 1, _GetNumCraftLines(profession) do
		local isHeader, color = _GetCraftLineInfo(profession, i)
		
		if not isHeader then
			counts[color] = counts[color] + 1
		end
	end
	return counts[1], counts[2], counts[3], counts[4]		-- orange, yellow, green, grey
end

local function _IsCraftKnown(profession, spellID)
	-- returns true if a given spell ID is known in the profession passed as first argument
	for i = 1, _GetNumCraftLines(profession) do
		local isHeader, _, info = _GetCraftLineInfo(profession, i)
		
		if not isHeader then
			if info == spellID then
				return true
			end
		end
	end
end

local function _GetGuildCrafters(guild)
	return guild.Members
end

local function _GetGuildMemberProfession(guild, member, index)
	local m = guild.Members[member]
	local profession = m.Professions[index]
	
	if type(profession) == "string" then
		local spellID = profession:match("trade:(%d+):")
		return tonumber(spellID), profession, m.lastUpdate	-- return the profession spell ID + full link
	elseif type(profession) == "number" then
		return profession, nil, m.lastUpdate					-- return the profession spell ID
	end
end

local function _GetProfessionSpellID(name)
	-- name can be either the english name or the localized name
	return ProfessionSpellID[name]
end

local PublicMethods = {
	GetProfession = _GetProfession,
	GetProfessions = _GetProfessions,
	GetProfessionInfo = _GetProfessionInfo,
	GetNumCraftLines = _GetNumCraftLines,
	GetCraftLineInfo = _GetCraftLineInfo,
	GetCraftCooldownInfo = _GetCraftCooldownInfo,
	GetNumActiveCooldowns = _GetNumActiveCooldowns,
	ClearExpiredCooldowns = _ClearExpiredCooldowns,
	GetCraftInfo = _GetCraftInfo,
	GetCraftLevels = _GetCraftLevels,
	GetNumRecipesByColor = _GetNumRecipesByColor,
	IsCraftKnown = _IsCraftKnown,
	GetGuildCrafters = _GetGuildCrafters,
	GetGuildMemberProfession = _GetGuildMemberProfession,
	GetProfessionSpellID = _GetProfessionSpellID,
}

-- *** Guild Comm ***
local function OnGuildAltsReceived(self, sender, alts)
	if sender == UnitName("player") then				-- if I receive my own list of alts in the same guild, same realm, same account..
		GuildBroadcast(MSG_SEND_LOGIN, GetVersion())
		addon:ScheduleTimer(SendAllProfessions, 5, alts)	-- broadcast my crafts to the guild 5 seconds later, to decrease the load at startup
	end
end

local GuildCommCallbacks = {
	[MSG_SEND_LOGIN] = function(sender, version)
			local player = UnitName("player")
			if sender ~= player then						-- don't send back to self
				GuildWhisper(sender, MSG_LOGIN_REPLY, GetVersion())
				local alts = DataStore:GetGuildMemberAlts(player)			-- get my own alts
				if alts then
					SendAllProfessions(alts, sender)	-- when another player sends me his login, reply with my own crafts
				end
			end
			SaveVersion(sender, version)
		end,
	[MSG_LOGIN_REPLY] = function(sender, version)
			SaveVersion(sender, version)
		end,
	[MSG_SEND_PROFESSION] = function(sender, alt, data, index)
			SaveProfession(sender, alt, data, index)
		end,
}

function addon:OnInitialize()
	addon.db = LibStub("AceDB-3.0"):New(addonName .. "DB", AddonDB_Defaults)

	DataStore:RegisterModule(addonName, addon, PublicMethods)
	DataStore:SetGuildCommCallbacks(commPrefix, GuildCommCallbacks)
	DataStore:SetCharacterBasedMethod("GetProfession")
	DataStore:SetCharacterBasedMethod("GetProfessions")
	
	DataStore:SetGuildBasedMethod("GetGuildCrafters")
	DataStore:SetGuildBasedMethod("GetGuildMemberProfession")
	
	addon:RegisterMessage("DATASTORE_GUILD_ALTS_RECEIVED", OnGuildAltsReceived)
	addon:RegisterComm(commPrefix, DataStore:GetGuildCommHandler())
end

function addon:OnEnable()
	addon:RegisterEvent("PLAYER_ALIVE", OnPlayerAlive)
	addon:RegisterEvent("TRADE_SKILL_SHOW", OnTradeSkillShow)
	addon:RegisterEvent("CHAT_MSG_SKILL", OnChatMsgSkill)
	
	addon:SetupOptions()
	ClearExpiredProfessions()	-- automatically cleanup guild profession links that are from an older version
	LocalizeProfessionSpellIDs()
end

function addon:OnDisable()
	addon:UnregisterEvent("PLAYER_ALIVE")
	addon:UnregisterEvent("TRADE_SKILL_SHOW")
	addon:UnregisterEvent("CHAT_MSG_SKILL")
end

function addon:GetSource(searchedID)
	local PT = LibStub("LibPeriodicTable-3.1")
	
	-- Returns "Profession, level"		ex: "Alchemy", "180"
	local level, data = PT:ItemInSet(searchedID, "Tradeskill.Crafted")
	if level and data then
		local _, _, profession = strsplit(".", data)		-- ex: "Tradeskill.Crafted.Inscription"
		local localizedProfession
		if ProfessionSpellID[profession] then
			localizedProfession = GetSpellInfo(ProfessionSpellID[profession])
		end
			
		return localizedProfession or profession, level
	end
end

function addon:IsTradeSkillWindowOpen()
	-- note : maybe there's a function in the WoW API to test this, but I did not find it :(
	return addon.isOpen
end

-- *** Hooks ***
-- todo : change the hooks, do them the Ace way
local Orig_DoTradeSkill = DoTradeSkill

function DoTradeSkill(index, repeatCount, ...)		-- this hook is necessary to get cooldown information after a craft
	Orig_DoTradeSkill(index, repeatCount, ...)
	addon:RegisterEvent("TRADE_SKILL_UPDATE", OnTradeSkillUpdate)
end

local Orig_AbandonSkill = AbandonSkill

function AbandonSkill(index, ...)
	local skillName = GetSkillLineInfo(index)				-- get the name of the profession that is being abandonned

	Orig_AbandonSkill(index, ...)
	
	-- clear the list of recipes
	local char = addon.ThisCharacter
	wipe(char.Professions[skillName])
	char.Professions[skillName] = nil
end