/**

  * vim: set ts=4 :

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

  * SourceMod Random Map Cycle Plugin

  * Randomly picks a map from the mapcycle.

  *

  * SourceMod (C)2004-2007 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_Mapfile = INVALID_HANDLE;

 new Handle:g_Cvar_ExcludeMaps = INVALID_HANDLE;

 new Handle:g_MapList = INVALID_HANDLE;

 new Handle:g_OldMapList = INVALID_HANDLE;

 new g_mapFileTime;

 public OnPluginStart()

 {

 	g_MapList = CreateArray(33);

 	g_OldMapList = CreateArray(33);

 	g_Cvar_Mapfile = CreateConVar("sm_randomcycle_file", "configs/maps.ini", "Map file to use. (Def sourcemod/configs/maps.ini)");

 	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 OnMapStart()

 {

 	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 (LoadMaps())

 	{

 		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 (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 && IsStringInArray(g_OldMapList, map))

 	{

 		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;

 }

 LoadMaps()

 {

 	new bool:fileFound;

 	decl String:mapPath[256], String:mapFile[64];

 	GetConVarString(g_Cvar_Mapfile, mapFile, 64);

 	BuildPath(Path_SM, mapPath, sizeof(mapPath), mapFile);

 	fileFound = FileExists(mapPath);

 	if (!fileFound)

 	{

 		new Handle:mapCycleFile = FindConVar("mapcyclefile");

 		GetConVarString(mapCycleFile, mapPath, sizeof(mapPath));

 		fileFound = FileExists(mapPath);

 	}

 	if (!fileFound)

 	{

 		LogError("Unable to locate sm_randomcycle_file or mapcyclefile, no maps loaded.");

 		if (g_MapList != INVALID_HANDLE)

 		{

 			ClearArray(g_MapList);

 		}

 		return 0;		

 	}

 	// If the file hasn't changed, there's no reason to reload

 	// all of the maps.

 	new fileTime =  GetFileTime(mapPath, FileTime_LastChange);

 	if (g_mapFileTime == fileTime)

 	{

 		return GetArraySize(g_MapList);

 	}

 	g_mapFileTime = fileTime;

 	// Reset the array

 	if (g_MapList != INVALID_HANDLE)

 	{

 		ClearArray(g_MapList);

 	}

 	LogMessage("[SM] Loading Random Cycle map file [%s]", mapPath);

 	new Handle:file = OpenFile(mapPath, "rt");

 	if (file == INVALID_HANDLE)

 	{

 		LogError("[SM] Could not open file: %s", mapPath);

 		return 0;

 	}

 	decl String:currentMap[32];

 	GetCurrentMap(currentMap, sizeof(currentMap));

 	decl String:buffer[64], len;

 	while (!IsEndOfFile(file) && ReadFileLine(file, buffer, sizeof(buffer)))

 	{

 		TrimString(buffer);

 		if ((len = StrContains(buffer, ".bsp", false)) != -1)

 		{

 			buffer[len] = '\0';

 		}

 		if (buffer[0] == '\0' || !IsValidConVarChar(buffer[0]) || !IsMapValid(buffer)

 			|| strcmp(currentMap, buffer, false) == 0)

 		{

 			continue;

 		}

 		PushArrayString(g_MapList, buffer);

 	}

 	CloseHandle(file);

 	return GetArraySize(g_MapList);

 }