/**

 * vim: set ts=4 :

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

 * SourceMod Nextmap Plugin

 * Adds sm_nextmap cvar for changing map and nextmap chat trigger.

 *

 * 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 = "Nextmap",

	author = "AlliedModders LLC",

	description = "Provides nextmap and sm_nextmap",

	version = SOURCEMOD_VERSION,

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

};

new bool:g_IntermissionCalled;

new UserMsg:g_VGUIMenu;

new Handle:g_Cvar_Chattime;

new Handle:g_Cvar_Nextmap;

new Handle:g_Cvar_Mapcycle;

new g_MapPos = -1;

new Handle:g_MapList = INVALID_HANDLE;

new g_mapFileTime;

public OnPluginStart()

{

	LoadTranslations("common.phrases");

	LoadTranslations("nextmap.phrases");

	g_VGUIMenu = GetUserMessageId("VGUIMenu");

	if (g_VGUIMenu == INVALID_MESSAGE_ID)

	{

		LogError("FATAL: Cannot find VGUIMenu user message id. Nextmap not loaded.");

		SetFailState("VGUIMenu Not Found");

	}

	g_Cvar_Chattime = FindConVar("mp_chattime");

	g_Cvar_Mapcycle = FindConVar("mapcyclefile");

	g_MapList = CreateArray(32);

	if (!LoadMaps())

	{

		LogError("FATAL: Cannot load map cycle. Nextmap not loaded.");

		SetFailState("Mapcycle Not Found");		

	}	

	HookUserMessage(g_VGUIMenu, UserMsg_VGUIMenu);

	HookConVarChange(g_Cvar_Mapcycle, ConVarChange_Mapcyclefile);

	g_Cvar_Nextmap = CreateConVar("sm_nextmap", "", "Sets the Next Map", FCVAR_NOTIFY);

	RegConsoleCmd("say", Command_Say);

	RegConsoleCmd("say_team", Command_Say);

	RegAdminCmd("sm_setnextmap", Command_SetNextmap, ADMFLAG_CHANGEMAP, "sm_setnextmap <map>");

	RegConsoleCmd("listmaps", Command_List);

	// Set to the current map so OnMapStart() will know what to do

	decl String:currentMap[64];

	GetCurrentMap(currentMap, 64);

	SetConVarString(g_Cvar_Nextmap, currentMap);

}

public OnMapStart()

{

	decl String:lastMap[64], String:currentMap[64];

	GetConVarString(g_Cvar_Nextmap, lastMap, 64);

	GetCurrentMap(currentMap, 64);

	// Why am I doing this? If we switched to a new map, but it wasn't what we expected (Due to sm_map, sm_votemap, or

	// some other plugin/command), we don't want to scramble the map cycle. Or for example, admin switches to a custom map

	// not in mapcyclefile. So we keep it set to the last expected nextmap. - ferret

	if (strcmp(lastMap, currentMap) == 0)

	{

		if (!LoadMaps())

		{

			LogError("FATAL: Cannot load map cycle. Nextmap not loaded.");

			SetFailState("Mapcycle Not Found");	

		}		

		FindAndSetNextMap();

	}

}

public OnMapEnd()

{

	g_IntermissionCalled = false;

}

public ConVarChange_Mapcyclefile(Handle:convar, const String:oldValue[], const String:newValue[])

{

	if (strcmp(oldValue, newValue, false) != 0)

	{

		if (!LoadMaps())

		{

			LogError("FATAL: Cannot load map cycle. Nextmap not loaded.");

			SetFailState("Mapcycle Not Found");	

		}

		FindAndSetNextMap();

	}

}

public Action:Command_Say(client, args)

{

	decl String:text[192];

	if (GetCmdArgString(text, sizeof(text)) < 1)

	{

		return Plugin_Continue;

	}

	new startidx;

	if (text[strlen(text)-1] == '"')

	{

		text[strlen(text)-1] = '\0';

		startidx = 1;

	}

	decl String:message[8];

	BreakString(text[startidx], message, sizeof(message));

	if (strcmp(message, "nextmap", false) == 0)

	{

		decl String:map[32];

		GetConVarString(g_Cvar_Nextmap, map, sizeof(map));

		PrintToChatAll("%t", "Next Map", map);

	}

	return Plugin_Continue;	

}

public Action:Command_SetNextmap(client, args)

{

	if (args < 1)

	{

		ReplyToCommand(client, "[SM] Usage: sm_setnextmap <map>");

		return Plugin_Handled;

	}

	decl String:map[64];

	GetCmdArg(1, map, sizeof(map));

	if (!IsMapValid(map))

	{

		ReplyToCommand(client, "[SM] %t", "Map was not found", map);

		return Plugin_Handled;

	}

	ShowActivity(client, "%t", "Cvar changed", "sm_nextmap", map);

	LogMessage("\"%L\" changed sm_nextmap to \"%s\"", client, map);

	SetConVarString(g_Cvar_Nextmap, map);

	return Plugin_Handled;

}

public Action:Command_List(client, args) 

{

	PrintToConsole(client, "Map Cycle:");

	new mapCount = GetArraySize(g_MapList);

	decl String:mapName[32];

	for (new i = 0; i < mapCount; i++)

	{

		GetArrayString(g_MapList, i, mapName, sizeof(mapName));

		PrintToConsole(client, "%s", mapName);

	}

	return Plugin_Handled;

}

public Action:UserMsg_VGUIMenu(UserMsg:msg_id, Handle:bf, const players[], playersNum, bool:reliable, bool:init)

{

	if (g_IntermissionCalled)

	{

		return Plugin_Handled;

	}

	decl String:type[15];

	BfReadString(bf, type, sizeof(type));

	if (BfReadByte(bf) == 1 && BfReadByte(bf) == 0 && (strcmp(type, "scores", false) == 0))

	{

		g_IntermissionCalled = true;

		decl String:map[32];

		new Float:fChatTime = GetConVarFloat(g_Cvar_Chattime);

		GetConVarString(g_Cvar_Nextmap, map, sizeof(map));

		if (!IsMapValid(map))

		{

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

		}

		if (fChatTime < 2.0)

			SetConVarFloat(g_Cvar_Chattime, 2.0);

		new Handle:dp;

		CreateDataTimer(fChatTime - 1.0, Timer_ChangeMap, dp);

		WritePackString(dp, map);

	}

	return Plugin_Handled;

}

public Action:Timer_ChangeMap(Handle:timer, Handle:dp)

{

	new String:map[32];

	ResetPack(dp);

	ReadPackString(dp, map, sizeof(map));

	InsertServerCommand("changelevel \"%s\"", map);

	ServerExecute();

	LogMessage("Nextmap changed map to \"%s\"", map);

	return Plugin_Stop;

}

LoadMaps()

{

	decl String:mapCycle[64];

	GetConVarString(g_Cvar_Mapcycle, mapCycle, 64);	

	if (!FileExists(mapCycle))

	{

		LogError("[SM] Could not find file: %s", mapCycle);

		return 0;

	}

	new fileTime =  GetFileTime(mapCycle, FileTime_LastChange);

	if (g_mapFileTime == fileTime)

	{

		return GetArraySize(g_MapList);

	}

	g_mapFileTime = fileTime;

	new Handle:file = OpenFile(mapCycle, "r");

	if (file == INVALID_HANDLE)

	{

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

		return 0;

	}

	g_MapPos = -1;

	if (g_MapList != INVALID_HANDLE)

	{

		ClearArray(g_MapList);

	}

	decl String:buffer[255];

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

	{

		TrimString(buffer);

		if (buffer[0] == '\0' || buffer[0] == ';')

		{

			continue;

		}

		if (IsMapValid(buffer))

		{

			PushArrayString(g_MapList, buffer);

		}

	}

	CloseHandle(file);

	return GetArraySize(g_MapList);

}

FindAndSetNextMap()

{

	new mapCount = GetArraySize(g_MapList);

	decl String:mapName[32];

	if (g_MapPos == -1)

	{

		decl String:current[64];

		GetCurrentMap(current, 64);

		for (new i = 0; i < mapCount; i++)

		{

			GetArrayString(g_MapList, i, mapName, sizeof(mapName));

			if (strcmp(current, mapName, false) == 0)

			{

				g_MapPos = i;

				break;

			}

		}

		if (g_MapPos == -1)

			g_MapPos = 0;

	}

	g_MapPos++;

	if (g_MapPos >= mapCount)

		g_MapPos = 0;	

 	GetArrayString(g_MapList, g_MapPos, mapName, sizeof(mapName));

	SetConVarString(g_Cvar_Nextmap, mapName);

}