#include clientscripts\_utility;
music_init()
{
	level.activeMusicState = "";
	level.nextMusicState = "";
	level.musicStates = [];
	level.musicEnt = spawnfakeent(0);
	level.stingerEnt = spawnfakeent(0);
	thread updateMusic();
	thread musicSaveWait();
	registerSystem("musicCmd", ::musicCmdHandler);
}
musicSaveWait()
{
	for(;;)
	{
		level waittill("save_restore");
		if(level.nextMusicState == "")
			level.nextMusicState = level.activeMusicState;
		level.activeMusicState = "";
		println("resetting music state to "+level.nextMusicState);
		states = getArrayKeys( level.musicStates );
		for ( i = 0; i < states.size; i++ )
		{
			stopLoopSound( 0, level.musicStates[states[i]].aliasEnt, 0 );
		}
		thread updateMusic();
	}
}
musicCmdHandler(clientNum, state, oldState)
{
	if(clientNum != 0)
		return;
	level.nextMusicState = state;
	println("music debug: got state '"+state+"'");
	level notify("new_music");
}
updateMusic()
{
	level endon("save_restore");
	while(1)
	{
		if(level.activeMusicState == level.nextMusicState)
			level waittill("new_music");
		if(level.activeMusicState == level.nextMusicState)
			continue;
		active = level.activeMusicState;
		next = level.nextMusicState;
		if(next != "" && !isdefined(level.musicStates[next]))
		{
			assertmsg("unknown music state '"+next+"'");
			level.nextMusicState = level.activeMusicState;
			continue;
		}
		if(active != "")
			transitionOut(active, next);
		if(next != "")
			transitionIn(active, next);
		level.activeMusicState = next;
	}
}
fadeOutAndStopSound(id, time)
{
	rate = 0;
	if(isdefined(time) && time != 0)
		rate = 1.0 / time;
	setSoundVolumeRate(id, rate);
	setSoundVolume(id, 0.0);
	wait(time);
	stopSound(id);
}
transitionOut(previous, next)
{
	if(previous == "")
		return;
	println("music transition out state "+next);
	if(!isdefined(level.musicStates[previous]))
	{
		assertmsg("unknown music state '"+previous+"'");
		return;
	}
	ent = level.musicStates[previous].aliasEnt;
	loopalias = level.musicStates[previous].loopalias;
	oneshotalias = level.musicStates[previous].oneshotalias;
	fadeout = level.musicStates[previous].fadeout;
	waittilldone = level.musicStates[previous].waittilldone;
	waittillstingerdone = level.musicStates[previous].waittillstingerdone;
	stinger = level.musicStates[previous].stinger;
	id = level.musicStates[previous].id;
	startDelay = level.musicStates[previous].startDelay;
	forceStinger = level.musicStates[previous].forceStinger;
	if(next == "")
	{
		nextloopalias = "";
		nextoneshotalias = "";
	}
	else
	{
		nextloopalias = level.musicStates[next].loopalias;
		nextoneshotalias = level.musicStates[next].oneshotalias;
	}
	stingerid = -1;
	loopMatches = loopalias == nextloopalias;
	haveOneShot = nextoneshotalias != "";
	if(stinger != "" && (!loopMatches || haveOneShot || forceStinger))
	{
		stingerid = playSound(0, stinger, (0,0,0));
	}
	if(loopalias != "")
	{
		if(loopalias != nextloopalias || nextoneshotalias != "")
		{
			stopLoopSound( 0, ent, fadeout );
			if(waittilldone)
			{
				wait(fadeout);
			}
		}
		else
		{
		}
	}
	else
	{
		if(waittilldone)
		{
			while(SoundPlaying(id))
			{
				wait(.01);
			}
		}
		else
		{
			thread fadeOutAndStopSound(id,fadeout);
		}
	}
	while(startDelay > 0 && SoundPlaying(stingerid) && GetPlaybackTime(stingerid) < startDelay * 1000)
	wait(.01);
	if(waittillstingerdone)
	{
		while(SoundPlaying(stingerid))
		wait(.01);
	}
	if(loopalias != nextloopalias)
		level.musicStates[previous].id = -1;
}
transitionIn(previous, next)
{
	ent = level.musicStates[next].aliasEnt;
	loopalias = level.musicStates[next].loopalias;
	oneshotalias = level.musicStates[next].oneshotalias;
	fadein = level.musicStates[next].fadein;
	loop	= level.musicStates[next].loop;
	println("music transition in state "+next);
	if(previous == "")
	{
		oldloopalias = "";
		oldoneshotalias = "";
		oldid = -1;
		oldstartDelay = 0;
		startDelay = 0;
	}
	else
	{
		oldloopalias = level.musicStates[previous].loopalias;
		oldoneshotalias = level.musicStates[previous].oneshotalias;
		oldid = level.musicStates[previous].id;
	}
	if(oneshotalias != "")
	{
		level.musicStates[next].id = playSound( 0, oneshotalias, (0,0,0) );
		if(loopalias != "")
		{
			while(SoundPlaying(level.musicStates[next].id) )
			{
				length = GetKnownLength(level.musicStates[next].id);
				time = 0;
				if(length != 0)
				{
					time = GetPlaybackTime(level.musicStates[next].id);
					if(length-time <= fadein*1000 )
						break;
				}
				wait(.01);
			}
		}
	}
	if(oldloopalias == loopalias && oldid != -1 && oneshotalias == "")
	{
		level.musicStates[next].id = level.musicStates[previous].id;
		level.musicStates[previous].id = -1;
		oldent = level.musicStates[previous].aliasEnt;
		level.musicStates[previous].aliasEnt = level.musicStates[next].aliasEnt;
		level.musicStates[next].aliasEnt = oldent;
	}
	else if(loopalias != "")
	{
		level.musicStates[next].id = playLoopSound( 0, ent, loopalias, fadein );
	}
}
declareMusicState(name)
{
	if ( isdefined( level.musicStates[name] ) )
		return;
	level.musicDeclareName = name;
	level.musicStates[name] = spawnStruct();
	level.musicStates[name].aliasEnt = spawnfakeent(0);
	level.musicStates[name].loopalias = "";
	level.musicStates[name].oneshotalias = "";
	level.musicStates[name].fadein = 0;
	level.musicStates[name].fadeout = 0;
	level.musicStates[name].id = -1;
	level.musicStates[name].waittilldone = false;
	level.musicStates[name].stinger = "";
	level.musicStates[name].waittillstingerdone = false;
	level.musicStates[name].startDelay = 0;
	level.musicStates[name].forceStinger = false;
}
musicWaitTillDone()
{
	assert(isdefined(level.musicDeclareName));
	name = level.musicDeclareName;
	level.musicStates[name].waittilldone = true;
}
musicWaitTillStingerDone()
{
	assert(isdefined(level.musicDeclareName));
	name = level.musicDeclareName;
	level.musicStates[name].waittillstingerdone = true;
}
musicStinger(stinger, delay, force)
{
	assert(isdefined(level.musicDeclareName));
	if(!isdefined(delay))
		delay = 0;
	name = level.musicDeclareName;
	level.musicStates[name].stinger = stinger;
	level.musicStates[name].startDelay = delay;
	if(isdefined(force))
	{
		level.musicStates[name].forceStinger = force;
	}
}
_musicAlias(alias, fadein, fadeout, loop)
{
	assert(isdefined(level.musicDeclareName));
	name = level.musicDeclareName;
	if(loop)
		level.musicStates[name].loopalias = alias;
	else
		level.musicStates[name].oneshotalias = alias;
	level.musicStates[name].fadein = fadein;
	level.musicStates[name].fadeout = fadeout;
}
musicAliasLoop(alias, fadein, fadeout)
{
	_musicAlias(alias, fadein, fadeout, true);
}
musicAlias(alias, fadeout)
{
	_musicAlias(alias, 0, fadeout, false);
}






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