--[[
	BeanCounter Addon for World of Warcraft(tm).
	Version: 3.9.0.1106 (Kangaroo)
	Revision: $Id: PostMonitor.lua 1106 2006-12-04 01:05:50Z esamynn $

	PostMonitor - Monitors auction posts

	License:
		This program is free software; you can redistribute it and/or
		modify it under the terms of the GNU General Public License
		as published by the Free Software Foundation; either version 2
		of the License, or (at your option) any later version.

		This program is distributed in the hope that it will be useful,
		but WITHOUT ANY WARRANTY; without even the implied warranty of
		MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
		GNU General Public License for more details.

		You should have received a copy of the GNU General Public License
		along with this program(see GPL.txt); if not, write to the Free Software
		Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

	Note:
		This AddOn's source code is specifically designed to work with
		World of Warcraft's interpreted AddOn system.
		You have an implicit licence to use this AddOn with these facilities
		since that is it's designated purpose as per:
		http://www.fsf.org/licensing/licenses/gpl-faq.html#InterpreterIncompat
--]]

-------------------------------------------------------------------------------
-- Function Imports
-------------------------------------------------------------------------------
local nilSafe = BeanCounter.NilSafe;

-------------------------------------------------------------------------------
-- Function Prototypes
-------------------------------------------------------------------------------
local preStartAuctionHook;
local addPendingPost;
local removePendingPost;
local onEventHook;
local onAuctionCreated;
local onBidFailed;
local debugPrint;

-------------------------------------------------------------------------------
-- Data Members
-------------------------------------------------------------------------------
local PendingPosts = {};

-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
function PostMonitor_OnLoad()
	Stubby.RegisterFunctionHook("StartAuction", -50, preStartAuctionHook)
end

-------------------------------------------------------------------------------
-- Called before StartAuction()
-------------------------------------------------------------------------------
function preStartAuctionHook(_, _, minBid, buyoutPrice, runTime)
	local name, texture, count, quality, canUse, price = GetAuctionSellItemInfo();
	if (name and count and price) then
		local deposit = CalculateAuctionDeposit(runTime);
		addPendingPost(name, count, minBid, buyoutPrice, runTime, deposit);
	end
end

-------------------------------------------------------------------------------
-- Adds a pending post to the queue.
-------------------------------------------------------------------------------
function addPendingPost(name, count, minBid, buyoutPrice, runTime, deposit)
	-- Add a pending post to the queue.
	local pendingPost = {};
	pendingPost.name = name;
	pendingPost.count = count;
	pendingPost.minBid = minBid;
	pendingPost.buyoutPrice = buyoutPrice;
	pendingPost.runTime = runTime;
	pendingPost.deposit = deposit;
	table.insert(PendingPosts, pendingPost);
	debugPrint("addPendingPost() - Added pending post");
	
	-- Register for the response events if this is the first pending post.
	if (#PendingPosts == 1) then
		debugPrint("addPendingPost() - Registering for CHAT_MSG_SYSTEM and UI_ERROR_MESSAGE");
		Stubby.RegisterEventHook("CHAT_MSG_SYSTEM", "BeanCounter_PostMonitor", onEventHook);
		Stubby.RegisterEventHook("UI_ERROR_MESSAGE", "BeanCounter_PostMonitor", onEventHook);
	end
end

-------------------------------------------------------------------------------
-- Removes the pending post from the queue.
-------------------------------------------------------------------------------
function removePendingPost()
	if (#PendingPosts > 0) then
		-- Remove the first pending post.
		local post = PendingPosts[1];
		table.remove(PendingPosts, 1);
		debugPrint("removePendingPost() - Removed pending post");

		-- Unregister for the response events if this is the last pending post.
		if (#PendingPosts == 0) then
			debugPrint("removePendingPost() - Unregistering for CHAT_MSG_SYSTEM and UI_ERROR_MESSAGE");
			Stubby.UnregisterEventHook("CHAT_MSG_SYSTEM", "BeanCounter_PostMonitor", onEventHook);
			Stubby.UnregisterEventHook("UI_ERROR_MESSAGE", "BeanCounter_PostMonitor", onEventHook);
		end

		return post;
	end
	
	-- No pending post to remove!
	return nil;
end

-------------------------------------------------------------------------------
-- OnEvent handler.
-------------------------------------------------------------------------------
function onEventHook(_, event, arg1)
	if (event == "CHAT_MSG_SYSTEM" and arg1) then
		debugPrint(event);
		if (arg1) then debugPrint("    "..arg1) end;
		if (arg1 == ERR_AUCTION_STARTED) then
		 	onAuctionCreated();
		end
	elseif (event == "UI_ERROR_MESSAGE" and arg1) then
		debugPrint(event);
		if (arg1) then debugPrint("    "..arg1) end;
		if (arg1 == ERR_NOT_ENOUGH_MONEY) then
			onPostFailed();
		end
	end
end

-------------------------------------------------------------------------------
-- Called when a post is accepted by the server.
-------------------------------------------------------------------------------
function onAuctionCreated()
	local post = removePendingPost();
	if (post) then
		-- Add to sales database
		BeanCounter.Sales.AddPendingAuction(time(), post.name, post.count, post.minBid, post.buyoutPrice, post.runTime, post.deposit, (GetAuctionHouseDepositRate() / 100));
	end
end

-------------------------------------------------------------------------------
-- Called when a post is rejected by the server.
-------------------------------------------------------------------------------
function onPostFailed()
	removePendingPost();
end

-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
function debugPrint(message)
	BeanCounter.DebugPrint("[BeanCounter.PostMonitor] "..message);
end
