#include "global.h"
#include "Foreground.h"
#include "RageUtil.h"
#include "GameState.h"
#include "PrefsManager.h"
#include "RageTextureManager.h"
#include "ActorUtil.h"
#include "Song.h"
#include "BackgroundUtil.h"


Foreground::~Foreground()
{
	Unload();
}

void Foreground::Unload()
{
	for( unsigned i=0; i < m_BGAnimations.size(); ++i )
		delete m_BGAnimations[i].m_bga;
	m_BGAnimations.clear();
	m_SubActors.clear();
	m_fLastMusicSeconds = -9999;
	m_pSong = nullptr;
}

void Foreground::LoadFromSong( const Song *pSong )
{
	// Song graphics can get very big; never keep them in memory.
	RageTextureID::TexPolicy OldPolicy = TEXTUREMAN->GetDefaultTexturePolicy();
	TEXTUREMAN->SetDefaultTexturePolicy( RageTextureID::TEX_VOLATILE );

	m_pSong = pSong;
	for (BackgroundChange const &change : pSong->GetForegroundChanges())
	{
		RString sBGName = change.m_def.m_sFile1,
			sLuaFile = pSong->GetSongDir() + sBGName + "/default.lua",
			sXmlFile = pSong->GetSongDir() + sBGName + "/default.xml";

		LoadedBGA bga;
		if ( DoesFileExist( sLuaFile ) )
		{
			bga.m_bga = ActorUtil::MakeActor( sLuaFile, this );
		}
		else if ( PREFSMAN->m_bQuirksMode && DoesFileExist( sXmlFile ) )
		{
			bga.m_bga = ActorUtil::MakeActor( sXmlFile, this );
		}
		else
		{
			bga.m_bga = ActorUtil::MakeActor( pSong->GetSongDir() + sBGName, this );
		}
		if( bga.m_bga == nullptr )
			continue;
		bga.m_bga->SetName( sBGName );
		// ActorUtil::MakeActor calls LoadFromNode to load the actor, and
		// LoadFromNode takes care of running the InitCommand, so do not run the
		// InitCommand here. -Kyz
		bga.m_fStartBeat = change.m_fStartBeat;
		bga.m_bFinished = false;

		bga.m_bga->SetVisible( false );

		this->AddChild( bga.m_bga );
		m_BGAnimations.push_back( bga );
	}

	TEXTUREMAN->SetDefaultTexturePolicy( OldPolicy );

	this->SortByDrawOrder();
}

void Foreground::Update( float fDeltaTime )
{
	// Calls to Update() should *not* be scaled by music rate unless RateModsAffectFGChanges is enabled. Undo it.
	const float fRate = PREFSMAN->m_bRateModsAffectTweens ? 1.0f : GAMESTATE->m_SongOptions.GetCurrent().m_fMusicRate;

	for( unsigned i=0; i < m_BGAnimations.size(); ++i )
	{
		LoadedBGA &bga = m_BGAnimations[i];

		if( GAMESTATE->m_Position.m_fSongBeat < bga.m_fStartBeat )
		{
			// The animation hasn't started yet.
			continue;
		}

		if( bga.m_bFinished )
			continue;

		/* Update the actor even if we're about to hide it, so queued commands
		 * are always run. */
		float lDeltaTime;
		if( !bga.m_bga->GetVisible() )
		{
			bga.m_bga->SetVisible( true );
			bga.m_bga->PlayCommand( "On" );

			const float fStartSecond = m_pSong->m_SongTiming.GetElapsedTimeFromBeat( bga.m_fStartBeat );
			const float fStopSecond = fStartSecond + bga.m_bga->GetTweenTimeLeft();
			bga.m_fStopBeat = m_pSong->m_SongTiming.GetBeatFromElapsedTime( fStopSecond );

			lDeltaTime = GAMESTATE->m_Position.m_fMusicSeconds - fStartSecond;
		}
		else
		{
			lDeltaTime = GAMESTATE->m_Position.m_fMusicSeconds - m_fLastMusicSeconds;
		}

		// This shouldn't go down, but be safe:
		lDeltaTime = max( lDeltaTime, 0 );

		bga.m_bga->Update( lDeltaTime / fRate );

		if( GAMESTATE->m_Position.m_fSongBeat > bga.m_fStopBeat )
		{
			// Finished.
			bga.m_bga->SetVisible( false );
			bga.m_bFinished = true;
			continue;
		}
	}

	m_fLastMusicSeconds = GAMESTATE->m_Position.m_fMusicSeconds;
}

void Foreground::HandleMessage( const Message &msg )
{
	// We want foregrounds to behave as if their On command happens at the
	// starting beat, not when the Foreground object receives an On command.
	// So don't propagate that; we'll call it ourselves.
	if (msg.GetName() == "On")
		Actor::HandleMessage(msg);
	else
		ActorFrame::HandleMessage(msg);
}

/*
 * (c) 2004 Glenn Maynard
 * All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, and/or sell copies of the Software, and to permit persons to
 * whom the Software is furnished to do so, provided that the above
 * copyright notice(s) and this permission notice appear in all copies of
 * the Software and that both the above copyright notice(s) and this
 * permission notice appear in supporting documentation.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
 * THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
 * INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
 * OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
 * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */