/* AMX Mod X
*   Natural-Selection NextMap Plugin
*
* by the AMX Mod X Development Team
*  originally developed by OLO
*
* This file is part of AMX Mod X.
*
*
*  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; if not, write to the Free Software Foundation,
*  Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*  In addition, as a special exception, the author gives permission to
*  link the code of this program with the Half-Life Game Engine ("HL
*  Engine") and Modified Game Libraries ("MODs") developed by Valve,
*  L.L.C ("Valve"). You must obey the GNU General Public License in all
*  respects for all of the code used other than the HL Engine and MODs
*  from Valve. If you modify this file, you may extend this exception
*  to your version of the file, but you are not obligated to do so. If
*  you do not wish to do so, delete this exception statement from your
*  version.
*/

enum mapdata {
	NAME[32],
	MIN,
	MAX
}

#include <amxmodx>
#include <engine>

#define MAX_MAPS	128
#define INFO_READ_TIME	5.0

new g_mapCycle[MAX_MAPS][mapdata]
new g_numMaps, g_numPlayers, g_nextPos
new bool:g_mapChanging, bool:g_changeMapDelay

public plugin_init() {
	register_plugin("NextMap",AMXX_VERSION_STR,"AMXX Dev Team")
	register_cvar("amx_nextmap","",FCVAR_SERVER|FCVAR_EXTDLL|FCVAR_SPONLY)
	register_cvar("amx_mapnum_ignore", "0")
	register_event("TextMsg", "voteMap", "a", "1=3", "2&executed votemap")
	register_event("PlayHUDNot", "roundEnded", "bc", "1=0", "2=57")
	register_clcmd("say nextmap", "sayNextMap", 0, "- displays nextmap")

	readMapCycle()
	findNextMap()
}

public server_changelevel() {
	if (g_mapChanging)
		return BLOCK_ONCE

	// Check if the cvar "amx_nextmap" has changed since the map loaded as it overrides the min/max settings.
	new szCvarNextMap[32]
	get_cvar_string("amx_nextmap", szCvarNextMap, 31)
	if ( !equal(szCvarNextMap, g_mapCycle[g_nextPos][NAME]) ) {
		if (is_map_valid(szCvarNextMap)) {
			if (g_changeMapDelay)
				set_task(INFO_READ_TIME, "changeMap", 0, szCvarNextMap, 32)
			else
				changeMap(szCvarNextMap)
			return BLOCK_ONCE
		}
	}

	new szNextMap[32]
	getNextValidMap(szNextMap)
	if (is_map_valid(szNextMap)) {
		if (g_changeMapDelay)
			set_task(INFO_READ_TIME, "changeMap", 0, szNextMap, 32)
		else
			changeMap(szNextMap)
	} else
		return BLOCK_NOT	// When NS trys to change map it disables gameplay, so we MUST change map.
					// This is a backup incase something unexpected happens to make sure we change map.

	g_mapChanging = true
	return BLOCK_ONCE
}

public getNextValidMap(szNextMap[]) {

/* Test min/max player settings.
   First test with number of players when the round ended, then with the current number of players,
   as this is how NS does it.
*/
	new startPos = g_nextPos

	if (!get_cvar_num("amx_mapnum_ignore")) {
		new curNumPlayers = get_playersnum()
		if (g_numPlayers == 0) g_numPlayers = curNumPlayers
		new looped
		while(looped < 2) {
			new minPlayers = g_mapCycle[g_nextPos][MIN]
			new maxPlayers = g_mapCycle[g_nextPos][MAX]
			if (maxPlayers == 0) maxPlayers = 32
			if (minPlayers <= g_numPlayers <= maxPlayers) break
			if (minPlayers <= curNumPlayers <= maxPlayers) {
				g_numPlayers = curNumPlayers
				break
			}
			if (++g_nextPos == g_numMaps) {
				g_nextPos = 0
				looped++
			}
		}
	}
	copy(szNextMap, 31, g_mapCycle[g_nextPos][NAME])

	if (startPos != g_nextPos) {	// Next Map wasn't valid due to min/max player settings
		client_print(0, print_chat, "Too %s players for %s. Next valid map: %s",
		(g_mapCycle[startPos][MIN] <= g_numPlayers) ? "many" : "few", g_mapCycle[startPos][NAME], g_mapCycle[g_nextPos][NAME])

		new szPos[8]
		num_to_str(g_nextPos, szPos, 7)
		set_localinfo("amx_nextmap_pos", szPos)
		set_cvar_string("amx_nextmap", g_mapCycle[g_nextPos][NAME])
		g_changeMapDelay = true
	}
}

public voteMap() {
	new szVoteMap[128]
	read_data(2, szVoteMap, 127)		// "YO | Cheesy Peteza executed votemap 2 (co_angst 1/5)"

	new start, end, szData[64]
	for (new i; i<strlen(szVoteMap); ++i) {
		if ( szVoteMap[i] == '(' ) start = i
		if ( szVoteMap[i] == ')' ) end = i
	}
	new j
	for (new i=start+1; i<end; ++i) {
		szData[j++] = szVoteMap[i]	// "co_angst 1/5"
	}
	szData[j] = 0
	replace(szData, 63, "/", " ")		// "co_angst 1 5"

	new szMapName[32], szVote1[3], szVote2[3], iVote1, iVote2
	parse(szData, szMapName, 31, szVote1, 2, szVote2, 2)
	iVote1 = str_to_num(szVote1)
	iVote2 = str_to_num(szVote2)

	if (iVote1 != 0 && iVote1 == iVote2) {
		client_print(0, print_chat, "Voting successful, changing map to %s", szMapName)
		set_cvar_string("amx_nextmap", szMapName)
		g_changeMapDelay = true
	}
}

findNextMap() {
	new szPos[8]
	get_localinfo("amx_nextmap_pos", szPos, 7)
	new pos = str_to_num(szPos)

	new curmap[32]
	get_mapname(curmap, 31)
	if ( equal(g_mapCycle[pos][NAME], curmap) ) {
		g_nextPos = pos + 1
		if (g_nextPos == g_numMaps)
			g_nextPos = 0
	} else {							// Map was changed manually.
		g_nextPos = pos
		new looped
		while( equal(g_mapCycle[g_nextPos][NAME], curmap) && looped < 2 ) {	// Don't let the nextmap be the same as this one
			if (++g_nextPos == g_numMaps) {
				g_nextPos = 0
				looped++
			}
		}
	}
	set_cvar_string("amx_nextmap", g_mapCycle[g_nextPos][NAME])
	num_to_str(g_nextPos, szPos, 7)
	set_localinfo("amx_nextmap_pos", szPos)
}

readMapCycle() {
	new szMapCycleFile[32]
	get_cvar_string("mapcyclefile", szMapCycleFile, 31)

	new length, line = 0
	new szBuffer[64], szMapName[32], szMapPlayerNum[32]
	if ( file_exists(szMapCycleFile) ) {
		while( read_file(szMapCycleFile, line++, szBuffer, 63, length) )  {	// ns_lost "\minplayers\16\maxplayers\32\"
			parse(szBuffer, szMapName, 31, szMapPlayerNum, 31)
			if ( !isalpha(szMapName[0]) || !is_map_valid(szMapName) ) continue

			copy(g_mapCycle[g_numMaps][NAME], 31, szMapName)

			for (new i; i<strlen(szMapPlayerNum); ++i) {			// " minplayers 16 maxplayers 32 "
				if (szMapPlayerNum[i] == '\')
					szMapPlayerNum[i] = ' '
			}
			new szKey1[11], szKey2[11], szValue1[3], szValue2[3]
			parse(szMapPlayerNum, szKey1, 10, szValue1, 2, szKey2, 10, szValue2, 2)
			if (equal(szKey1, "minplayers"))
				g_mapCycle[g_numMaps][MIN] = clamp(str_to_num(szValue1), 0, 32)
			if (equal(szKey2, "maxplayers"))
				g_mapCycle[g_numMaps][MAX] = clamp(str_to_num(szValue2), 0, 32)

			if (++g_numMaps == MAX_MAPS) break
		}
	}
}

public roundEnded() {
	g_numPlayers = get_playersnum()
	set_task(8.0, "sayNextMapTimeLeft")
}

public sayNextMap(){
	new szName[32]
	get_cvar_string("amx_nextmap", szName, 31)
	client_print(0, print_chat, "Next Map:  %s", szName)
}

public sayNextMapTimeLeft(){
	new szName[32], szText[128]
	get_cvar_string("amx_nextmap", szName, 31)
	format(szText, 64, "Next Map:  %s", szName)

	if (get_cvar_float("mp_timelimit")) {
		new a = get_timeleft()
		format(szText, 127, "%s  Time Left:  %d:%02d", szText, (a / 60) , (a % 60) )
	}
	client_print(0, print_chat, "%s", szText)
}

public changeMap(szMapName[])
	server_cmd("changelevel %s", szMapName)

