/**

 * vim: set ts=4 :

 * =============================================================================

 * SourceMod Random Map Cycle Plugin

 * Randomly picks a map from the mapcycle.

 *

 * SourceMod (C)2004-2008 AlliedModders LLC.  All rights reserved.

 * =============================================================================

 *

 * This program is free software; you can redistribute it and/or modify it under

 * the terms of the GNU General Public License, version 3.0, as published by the

 * Free Software Foundation.

 * 

 * 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.  If not, see <http://www.gnu.org/licenses/>.

 *

 * As a special exception, AlliedModders LLC gives you permission to link the

 * code of this program (as well as its derivative works) to "Half-Life 2," the

 * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software

 * by the Valve Corporation.  You must obey the GNU General Public License in

 * all respects for all other code used.  Additionally, AlliedModders LLC grants

 * this exception to all derivative works.  AlliedModders LLC defines further

 * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),

 * or <http://www.sourcemod.net/license.php>.

 *

 * Version: $Id$

 */

#pragma semicolon 1

#include <sourcemod>

public Plugin:myinfo =

{

	name = "RandomCycle",

	author = "AlliedModders LLC",

	description = "Randomly chooses the next map.",

	version = SOURCEMOD_VERSION,

	url = "http://www.sourcemod.net/"

};

new Handle:g_Cvar_Nextmap = INVALID_HANDLE;

new Handle:g_Cvar_ExcludeMaps = INVALID_HANDLE;

new Handle:g_MapList = INVALID_HANDLE;

new Handle:g_OldMapList = INVALID_HANDLE;

new g_mapListSerial = -1;

public OnPluginStart()

{

	new arraySize = ByteCountToCells(33);	

	g_MapList = CreateArray(arraySize);

	g_OldMapList = CreateArray(arraySize);

	g_Cvar_ExcludeMaps = CreateConVar("sm_randomcycle_exclude", "5", "Specifies how many past maps to exclude from the vote.", _, true, 0.0);

	AutoExecConfig(true, "randomcycle");

}

public OnConfigsExecuted()

{

	g_Cvar_Nextmap = FindConVar("sm_nextmap");

	if (g_Cvar_Nextmap == INVALID_HANDLE)

	{

		LogError("FATAL: Cannot find sm_nextmap cvar. RandomCycle not loaded.");

		SetFailState("sm_nextmap not found");

	}

	if (ReadMapList(g_MapList, 

					g_mapListSerial, 

					"randomcycle", 

					MAPLIST_FLAG_CLEARARRAY|MAPLIST_FLAG_MAPSFOLDER)

		== INVALID_HANDLE)

	{

		if (g_mapListSerial == -1)

		{

			LogError("Unable to create a valid map list.");

		}

	}

	CreateTimer(5.0, Timer_RandomizeNextmap); // Small delay to give Nextmap time to complete OnMapStart()

}

public Action:Timer_RandomizeNextmap(Handle:timer)

{

	decl String:map[32];

	new bool:oldMaps = false;

	if (GetConVarInt(g_Cvar_ExcludeMaps) && GetArraySize(g_MapList) > GetConVarInt(g_Cvar_ExcludeMaps))

	{

		oldMaps = true;

	}

	new b = GetRandomInt(0, GetArraySize(g_MapList) - 1);

	GetArrayString(g_MapList, b, map, sizeof(map));

	while (oldMaps && FindStringInArray(g_OldMapList, map) != -1)

	{

		b = GetRandomInt(0, GetArraySize(g_MapList) - 1);

		GetArrayString(g_MapList, b, map, sizeof(map));

	}

	SetConVarString(g_Cvar_Nextmap, map);

	PushArrayString(g_OldMapList, map);

	if (GetArraySize(g_OldMapList) > GetConVarInt(g_Cvar_ExcludeMaps))

	{

		RemoveFromArray(g_OldMapList, 0);

	}

	LogMessage("RandomCycle has chosen %s for the nextmap.", map);	

	return Plugin_Stop;

}