//=========== Copyright (c) Valve Corporation, All rights reserved. ===========
//
// Simple entity to switch the map's 2D skybox texture when triggered.
//
//=============================================================================

#include "cbase.h"

// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"


//-----------------------------------------------------------------------------
// CSkyboxSwapper
//-----------------------------------------------------------------------------
class CSkyboxSwapper : public CServerOnlyPointEntity
{
	DECLARE_CLASS( CSkyboxSwapper, CServerOnlyPointEntity );
public:
	DECLARE_DATADESC();

	virtual void Spawn( void );
	virtual void Precache( void );

	void InputTrigger( inputdata_t &inputdata );

protected:
	string_t m_iszSkyboxName;
};

LINK_ENTITY_TO_CLASS(skybox_swapper, CSkyboxSwapper);

BEGIN_DATADESC( CSkyboxSwapper )
	DEFINE_KEYFIELD( m_iszSkyboxName, FIELD_STRING, "SkyboxName" ),
	// Inputs
	DEFINE_INPUTFUNC(FIELD_VOID, "Trigger", InputTrigger),
END_DATADESC()


//-----------------------------------------------------------------------------
// Purpose: not much
//-----------------------------------------------------------------------------
void CSkyboxSwapper::Spawn( void )
{
	Precache();
}

//-----------------------------------------------------------------------------
// Purpose: Precache the skybox materials.
//-----------------------------------------------------------------------------
void CSkyboxSwapper::Precache( void )
{
	if ( Q_strlen( m_iszSkyboxName.ToCStr() ) == 0 )
	{
		Warning( "skybox_swapper (%s) has no skybox specified!\n", GetEntityName().ToCStr() );
		return;
	}

	char  name[ MAX_PATH ];
	char *skyboxsuffix[ 6 ] = { "rt", "bk", "lf", "ft", "up", "dn" };
	for ( int i = 0; i < 6; i++ )
	{
		Q_snprintf( name, sizeof( name ), "skybox/%s%s", m_iszSkyboxName.ToCStr(), skyboxsuffix[i] );
		PrecacheMaterial( name );
	}
}

//-----------------------------------------------------------------------------
// Purpose: Input handler that triggers the skybox swap.
//-----------------------------------------------------------------------------
void CSkyboxSwapper::InputTrigger( inputdata_t &inputdata )
{
	static ConVarRef skyname( "sv_skyname", false );
	if ( !skyname.IsValid() )
	{
		Warning( "skybox_swapper (%s) trigger input failed - cannot find 'sv_skyname' convar!\n", GetEntityName().ToCStr() );
		return;
	}
	skyname.SetValue( m_iszSkyboxName.ToCStr() );
}