//========= Copyright © 1996-2005, Valve Corporation, All rights reserved. ============//
//
// Purpose: Precaches and defs for entities and other data that must always be available.
//
// $NoKeywords: $
//=============================================================================//

#include "cbase.h"
#include "soundent.h"
#include "client.h"
#include "decals.h"
#include "EnvMessage.h"
#include "player.h"
#include "gamerules.h"
#include "teamplay_gamerules.h"
#include "physics.h"
#include "isaverestore.h"
#include "activitylist.h"
#include "eventlist.h"
#include "eventqueue.h"
#include "ai_network.h"
#include "ai_schedule.h"
#include "ai_networkmanager.h"
#include "basetempentity.h"
#include "world.h"
#include "mempool.h"
#include "igamesystem.h"
#include "engine/IEngineSound.h"
#include "globals.h"
#include "engine/IStaticPropMgr.h"

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

extern CBaseEntity				*g_pLastSpawn;
void InitBodyQue(void);
extern void W_Precache(void);
extern void ActivityList_Free( void );
extern CMemoryPool g_EntityListPool;

#define SF_DECAL_NOTINDEATHMATCH		2048

class CDecal : public CPointEntity
{
public:
	DECLARE_CLASS( CDecal, CPointEntity );

	void	Spawn( void );
	bool	KeyValue( const char *szKeyName, const char *szValue );

	// Need to apply static decals here to get them into the signon buffer for the server appropriately
	virtual void Activate();

	void	TriggerDecal( CBaseEntity *pActivator, CBaseEntity *pCaller, USE_TYPE useType, float value );

	// Input handlers.
	void	InputActivate( inputdata_t &inputdata );

	DECLARE_DATADESC();

public:
	int		m_nTexture;
	bool	m_bLowPriority;

private:

	void	StaticDecal( void );
};

BEGIN_DATADESC( CDecal )

	DEFINE_FIELD( m_nTexture, FIELD_INTEGER ),
	DEFINE_KEYFIELD( m_bLowPriority, FIELD_BOOLEAN, "LowPriority" ), // Don't mark as FDECAL_PERMANENT so not save/restored and will be reused on the client preferentially

	// Function pointers
	DEFINE_FUNCTION( StaticDecal ),
	DEFINE_FUNCTION( TriggerDecal ),

	DEFINE_INPUTFUNC( FIELD_VOID, "Activate", InputActivate ),

END_DATADESC()

LINK_ENTITY_TO_CLASS( infodecal, CDecal );

// UNDONE:  These won't get sent to joining players in multi-player
void CDecal::Spawn( void )
{
	if ( m_nTexture < 0 || 
		(gpGlobals->deathmatch && HasSpawnFlags( SF_DECAL_NOTINDEATHMATCH )) )
	{
		UTIL_Remove( this );
		return;
	} 
}

void CDecal::Activate()
{
	BaseClass::Activate();

	if ( !GetEntityName() )
	{
		StaticDecal();
	}
	else
	{
		// if there IS a targetname, the decal sprays itself on when it is triggered.
		SetThink ( &CDecal::SUB_DoNothing );
		SetUse(&CDecal::TriggerDecal);
	}
}

void CDecal::TriggerDecal ( CBaseEntity *pActivator, CBaseEntity *pCaller, USE_TYPE useType, float value )
{
	// this is set up as a USE function for info_decals that have targetnames, so that the
	// decal doesn't get applied until it is fired. (usually by a scripted sequence)
	trace_t		trace;
	int			entityIndex;

	UTIL_TraceLine( GetAbsOrigin() - Vector(5,5,5), GetAbsOrigin() + Vector(5,5,5), MASK_SOLID_BRUSHONLY, this, COLLISION_GROUP_NONE, &trace );

	entityIndex = trace.m_pEnt ? trace.m_pEnt->entindex() : 0;

	CBroadcastRecipientFilter filter;

	te->BSPDecal( filter, 0.0, 
		&GetAbsOrigin(), entityIndex, m_nTexture );

	SetThink( &CDecal::SUB_Remove );
	SetNextThink( gpGlobals->curtime + 0.1f );
}


void CDecal::InputActivate( inputdata_t &inputdata )
{
	TriggerDecal( inputdata.pActivator, inputdata.pCaller, USE_ON, 0 );
}


void CDecal::StaticDecal( void )
{
	class CTraceFilterValidForDecal : public CTraceFilterSimple
	{
	public:
		CTraceFilterValidForDecal(const IHandleEntity *passentity, int collisionGroup )
		 :	CTraceFilterSimple( passentity, collisionGroup )
		{
		}

		virtual bool ShouldHitEntity( IHandleEntity *pServerEntity, int contentsMask )
		{
			static const char *ppszIgnoredClasses[] = 
			{
				"weapon_*",
				"item_*",
				"prop_ragdoll",
				"prop_dynamic",
				"prop_static",
				"prop_physics",
				"npc_bullseye",  // Tracker 15335
			};

			CBaseEntity *pEntity = EntityFromEntityHandle( pServerEntity );

			// Tracker 15335:  Never impact decals against entities which are not rendering, either.
			if ( pEntity->IsEffectActive( EF_NODRAW ) )
				return false;

			for ( int i = 0; i < ARRAYSIZE(ppszIgnoredClasses); i++ )
			{
				if ( pEntity->ClassMatches( ppszIgnoredClasses[i] ) )
					return false;
			}


			return CTraceFilterSimple::ShouldHitEntity( pServerEntity, contentsMask );
		}
	};

	trace_t trace;
	CTraceFilterValidForDecal traceFilter( this, COLLISION_GROUP_NONE );
	int entityIndex, modelIndex = 0;

	Vector position = GetAbsOrigin();
	UTIL_TraceLine( position - Vector(5,5,5), position + Vector(5,5,5),  MASK_SOLID, &traceFilter, &trace );

	bool canDraw = true;

	entityIndex = (short)trace.m_pEnt ? trace.m_pEnt->entindex() : 0;
	if ( entityIndex )
	{
		CBaseEntity *ent = trace.m_pEnt;
		if ( ent )
		{
			modelIndex = ent->GetModelIndex();
			VectorITransform( GetAbsOrigin(), ent->EntityToWorldTransform(), position );

			canDraw = ( modelIndex != 0 );
			if ( !canDraw )
			{
				Warning( "Suppressed StaticDecal which would have hit entity %i (class:%s, name:%s) with modelindex = 0\n",
					ent->entindex(),
					ent->GetClassname(),
					STRING( ent->GetEntityName() ) );
			}
		}
	}

	if ( canDraw )
	{
		engine->StaticDecal( position, m_nTexture, entityIndex, modelIndex, m_bLowPriority );
	}

	SUB_Remove();
}


bool CDecal::KeyValue( const char *szKeyName, const char *szValue )
{
	if (FStrEq(szKeyName, "texture"))
	{
		// FIXME:  should decals all be preloaded?
		m_nTexture = UTIL_PrecacheDecal( szValue, true );
		
		// Found
		if (m_nTexture >= 0 )
			return true;
		Warning( "Can't find decal %s\n", szValue );
	}
	else
	{
		return BaseClass::KeyValue( szKeyName, szValue );
	}

	return true;
}

//-----------------------------------------------------------------------------
// Purpose: Projects a decal against a prop
//-----------------------------------------------------------------------------
class CProjectedDecal : public CPointEntity
{
public:
	DECLARE_CLASS( CProjectedDecal, CPointEntity );

	void	Spawn( void );
	bool	KeyValue( const char *szKeyName, const char *szValue );

	// Need to apply static decals here to get them into the signon buffer for the server appropriately
	virtual void Activate();

	void	TriggerDecal( CBaseEntity *pActivator, CBaseEntity *pCaller, USE_TYPE useType, float value );

	// Input handlers.
	void	InputActivate( inputdata_t &inputdata );

	DECLARE_DATADESC();

public:
	int		m_nTexture;
	float	m_flDistance;

private:
	void	ProjectDecal( CRecipientFilter& filter );

	void	StaticDecal( void );
};

BEGIN_DATADESC( CProjectedDecal )

	DEFINE_FIELD( m_nTexture, FIELD_INTEGER ),

	DEFINE_KEYFIELD( m_flDistance, FIELD_FLOAT, "Distance" ),

	// Function pointers
	DEFINE_FUNCTION( StaticDecal ),
	DEFINE_FUNCTION( TriggerDecal ),

	DEFINE_INPUTFUNC( FIELD_VOID, "Activate", InputActivate ),

END_DATADESC()

LINK_ENTITY_TO_CLASS( info_projecteddecal, CProjectedDecal );

// UNDONE:  These won't get sent to joining players in multi-player
void CProjectedDecal::Spawn( void )
{
	if ( m_nTexture < 0 || 
		(gpGlobals->deathmatch && HasSpawnFlags( SF_DECAL_NOTINDEATHMATCH )) )
	{
		UTIL_Remove( this );
		return;
	} 
}

void CProjectedDecal::Activate()
{
	BaseClass::Activate();

	if ( !GetEntityName() )
	{
		StaticDecal();
	}
	else
	{
		// if there IS a targetname, the decal sprays itself on when it is triggered.
		SetThink ( &CProjectedDecal::SUB_DoNothing );
		SetUse(&CProjectedDecal::TriggerDecal);
	}
}

void CProjectedDecal::InputActivate( inputdata_t &inputdata )
{
	TriggerDecal( inputdata.pActivator, inputdata.pCaller, USE_ON, 0 );
}

void CProjectedDecal::ProjectDecal( CRecipientFilter& filter )
{
	te->ProjectDecal( filter, 0.0, 
		&GetAbsOrigin(), &GetAbsAngles(), m_flDistance, m_nTexture );
}

void CProjectedDecal::TriggerDecal ( CBaseEntity *pActivator, CBaseEntity *pCaller, USE_TYPE useType, float value )
{
	CBroadcastRecipientFilter filter;

	ProjectDecal( filter );

	SetThink( &CProjectedDecal::SUB_Remove );
	SetNextThink( gpGlobals->curtime + 0.1f );
}

void CProjectedDecal::StaticDecal( void )
{
	CBroadcastRecipientFilter initFilter;
	initFilter.MakeInitMessage();

	ProjectDecal( initFilter );

	SUB_Remove();
}


bool CProjectedDecal::KeyValue( const char *szKeyName, const char *szValue )
{
	if (FStrEq(szKeyName, "texture"))
	{
		// FIXME:  should decals all be preloaded?
		m_nTexture = UTIL_PrecacheDecal( szValue, true );
		
		// Found
		if (m_nTexture >= 0 )
			return true;
		Warning( "Can't find decal %s\n", szValue );
	}
	else
	{
		return BaseClass::KeyValue( szKeyName, szValue );
	}

	return true;
}

//=======================
// CWorld
//
// This spawns first when each level begins.
//=======================
LINK_ENTITY_TO_CLASS( worldspawn, CWorld );

BEGIN_DATADESC( CWorld )

	DEFINE_FIELD( m_flWaveHeight, FIELD_FLOAT ),

	// keyvalues are parsed from map, but not saved/loaded
	DEFINE_KEYFIELD( m_iszChapterTitle, FIELD_STRING, "chaptertitle" ),
	DEFINE_KEYFIELD( m_bStartDark,		FIELD_BOOLEAN, "startdark" ),
	DEFINE_KEYFIELD( m_bDisplayTitle,	FIELD_BOOLEAN, "gametitle" ),
	DEFINE_FIELD( m_WorldMins, FIELD_VECTOR ),
	DEFINE_FIELD( m_WorldMaxs, FIELD_VECTOR ),
	DEFINE_KEYFIELD( m_flMaxOccludeeArea, FIELD_FLOAT, "maxoccludeearea" ),
	DEFINE_KEYFIELD( m_flMinOccluderArea, FIELD_FLOAT, "minoccluderarea" ),
	DEFINE_KEYFIELD( m_flMaxPropScreenSpaceWidth, FIELD_FLOAT, "maxpropscreenwidth" ),
	DEFINE_KEYFIELD( m_flMinPropScreenSpaceWidth, FIELD_FLOAT, "minpropscreenwidth" ),

END_DATADESC()


// SendTable stuff.
IMPLEMENT_SERVERCLASS_ST(CWorld, DT_WORLD)
	SendPropFloat	(SENDINFO(m_flWaveHeight), 8, SPROP_ROUNDUP,	0.0f,	8.0f),
	SendPropVector	(SENDINFO(m_WorldMins),	-1,	SPROP_COORD),
	SendPropVector	(SENDINFO(m_WorldMaxs),	-1,	SPROP_COORD),
	SendPropInt		(SENDINFO(m_bStartDark), 1, SPROP_UNSIGNED ),
	SendPropFloat	(SENDINFO(m_flMaxOccludeeArea), 0, SPROP_NOSCALE ),
	SendPropFloat	(SENDINFO(m_flMinOccluderArea), 0, SPROP_NOSCALE ),
	SendPropFloat	(SENDINFO(m_flMaxPropScreenSpaceWidth), 0, SPROP_NOSCALE ),
	SendPropFloat	(SENDINFO(m_flMinPropScreenSpaceWidth), 0, SPROP_NOSCALE ),
END_SEND_TABLE()

//
// Just to ignore the "wad" field.
//
bool CWorld::KeyValue( const char *szKeyName, const char *szValue )
{
	if ( FStrEq(szKeyName, "skyname") )
	{
		// Sent over net now.
		ConVar *skyname = ( ConVar * )cvar->FindVar( "sv_skyname" );
		if ( skyname )
		{
			skyname->SetValue( szValue );
		}
	}
	else if ( FStrEq(szKeyName, "newunit") )
	{
		// Single player only.  Clear save directory if set
		if ( atoi(szValue) )
		{
			extern void Game_SetOneWayTransition();
			Game_SetOneWayTransition();
		}
	}
	else if ( FStrEq(szKeyName, "world_mins") )
	{
		Vector vec;
		sscanf(	szValue, "%f %f %f", &vec.x, &vec.y, &vec.z );
		m_WorldMins = vec;
	}
	else if ( FStrEq(szKeyName, "world_maxs") )
	{
		Vector vec;
		sscanf(	szValue, "%f %f %f", &vec.x, &vec.y, &vec.z ); 
		m_WorldMaxs = vec;
	}
	else
		return BaseClass::KeyValue( szKeyName, szValue );

	return true;
}


extern bool		g_fGameOver;

CWorld::CWorld( )
{
	AddEFlags( EFL_NO_AUTO_EDICT_ATTACH );
	NetworkProp()->AttachEdict( INDEXENT(RequiredEdictIndex()) );
	ActivityList_Init();
	EventList_Init();
	
	SetSolid( SOLID_BSP );
	SetMoveType( MOVETYPE_NONE );
}

CWorld::~CWorld( )
{
	EventList_Free();
	ActivityList_Free();
	if ( g_pGameRules )
	{
		g_pGameRules->LevelShutdown();
		delete g_pGameRules;
		g_pGameRules = NULL;
	}
}


//------------------------------------------------------------------------------
// Purpose : Add a decal to the world
// Input   :
// Output  :
//------------------------------------------------------------------------------
void CWorld::DecalTrace( trace_t *pTrace, char const *decalName)
{
	int index = decalsystem->GetDecalIndexForName( decalName );
	if ( index < 0 )
		return;

	CBroadcastRecipientFilter filter;
	if ( pTrace->hitbox != 0 )
	{
		te->Decal( filter, 0.0f, &pTrace->endpos, &pTrace->startpos, 0, pTrace->hitbox, index );
	}
	else
	{
		te->WorldDecal( filter, 0.0, &pTrace->endpos, index );
	}
}

void CWorld::RegisterSharedActivities( void )
{
	ActivityList_RegisterSharedActivities();
}

void CWorld::RegisterSharedEvents( void )
{
	EventList_RegisterSharedEvents();
}


void CWorld::Spawn( void )
{
	SetLocalOrigin( vec3_origin );
	SetLocalAngles( vec3_angle );
	// NOTE:  SHOULD NEVER BE ANYTHING OTHER THAN 1!!!
	SetModelIndex( 1 );
	// world model
	SetModelName( MAKE_STRING( modelinfo->GetModelName( GetModel() ) ) );
	AddFlag( FL_WORLDBRUSH );

	g_EventQueue.Init();
	Precache( );
}

static CWorld *g_WorldEntity = NULL;

static const char *g_DefaultLightstyles[] =
{
	// 0 normal
	"m",
	// 1 FLICKER (first variety)
	"mmnmmommommnonmmonqnmmo",
	// 2 SLOW STRONG PULSE
	"abcdefghijklmnopqrstuvwxyzyxwvutsrqponmlkjihgfedcba",
	// 3 CANDLE (first variety)
	"mmmmmaaaaammmmmaaaaaabcdefgabcdefg",
	// 4 FAST STROBE
	"mamamamamama",
	// 5 GENTLE PULSE 1
	"jklmnopqrstuvwxyzyxwvutsrqponmlkj",
	// 6 FLICKER (second variety)
	"nmonqnmomnmomomno",
	// 7 CANDLE (second variety)
	"mmmaaaabcdefgmmmmaaaammmaamm",
	// 8 CANDLE (third variety)
	"mmmaaammmaaammmabcdefaaaammmmabcdefmmmaaaa",
	// 9 SLOW STROBE (fourth variety)
	"aaaaaaaazzzzzzzz",
	// 10 FLUORESCENT FLICKER
	"mmamammmmammamamaaamammma",
	// 11 SLOW PULSE NOT FADE TO BLACK
	"abcdefghijklmnopqrrqponmlkjihgfedcba",
	// 12 UNDERWATER LIGHT MUTATION
	// this light only distorts the lightmap - no contribution
	// is made to the brightness of affected surfaces
	"mmnnmmnnnmmnn",
};


CWorld* GetWorldEntity()
{
	return g_WorldEntity;
}

const char *GetDefaultLightstyleString( int styleIndex )
{
	if ( styleIndex < ARRAYSIZE(g_DefaultLightstyles) )
	{
		return g_DefaultLightstyles[styleIndex];
	}
	return "m";
}

void CWorld::Precache( void )
{
	g_WorldEntity = this;
	g_fGameOver = false;
	g_pLastSpawn = NULL;

	ConVar *stepsize = ( ConVar * )cvar->FindVar( "sv_stepsize" );
	if ( stepsize )
	{
		stepsize->SetValue( 18 );
	}

	ConVar *roomtype = ( ConVar * )cvar->FindVar( "room_type" );
	if ( roomtype )
	{
		roomtype->SetValue( 0 );
	}

	// Set up game rules
	Assert( !g_pGameRules );
	if (g_pGameRules)
	{
		delete g_pGameRules;
	}

	InstallGameRules();
	Assert( g_pGameRules );

	CSoundEnt::InitSoundEnt();

	// Only allow precaching between LevelInitPreEntity and PostEntity
	CBaseEntity::SetAllowPrecache( true );
	IGameSystem::LevelInitPreEntityAllSystems( STRING( GetModelName() ) );

	// Create the player resource
	g_pGameRules->CreateStandardEntities();

	// UNDONE: Make most of these things server systems or precache_registers
	// =================================================
	//	Activities
	// =================================================
	ActivityList_Free();
	RegisterSharedActivities();

	EventList_Free();
	RegisterSharedEvents();

	InitBodyQue();
// init sentence group playback stuff from sentences.txt.
// ok to call this multiple times, calls after first are ignored.

	SENTENCEG_Init();

// the area based ambient sounds MUST be the first precache_sounds

// player precaches     
	W_Precache ();									// get weapon precaches
	ClientPrecache();
	g_pGameRules->Precache();
	// precache all temp ent stuff
	CBaseTempEntity::PrecacheTempEnts();

	g_Language.SetValue( LANGUAGE_ENGLISH );	// TODO use VGUI to get current language

	if ( g_Language.GetInt() == LANGUAGE_GERMAN )
	{
		PrecacheModel( "models/germangibs.mdl" );
	}
	else
	{
		PrecacheModel( "models/gibs/hgibs.mdl" );
	}

	PrecacheScriptSound( "BaseEntity.EnterWater" );
	PrecacheScriptSound( "BaseEntity.ExitWater" );

//
// Setup light animation tables. 'a' is total darkness, 'z' is maxbright.
//
	for ( int i = 0; i < ARRAYSIZE(g_DefaultLightstyles); i++ )
	{
		engine->LightStyle( i, GetDefaultLightstyleString(i) );
	}

	// styles 32-62 are assigned by the light program for switchable lights

	// 63 testing
	engine->LightStyle(63, "a");

	// =================================================
	//	Load and Init AI Networks
	// =================================================
	CAI_NetworkManager::InitializeAINetworks();
	// =================================================
	//	Load and Init AI Schedules
	// =================================================
	g_AI_SchedulesManager.LoadAllSchedules();
	// =================================================
	//	Initialize NPC Relationships
	// =================================================
	g_pGameRules->InitDefaultAIRelationships();
	CBaseCombatCharacter::InitInteractionSystem();

	// Call all registered precachers.
	CPrecacheRegister::Precache();	

	if ( m_iszChapterTitle != NULL_STRING )
	{
		DevMsg( 2, "Chapter title: %s\n", STRING(m_iszChapterTitle) );
		CMessage *pMessage = (CMessage *)CBaseEntity::Create( "env_message", vec3_origin, vec3_angle, NULL );
		if ( pMessage )
		{
			pMessage->SetMessage( m_iszChapterTitle );
			m_iszChapterTitle = NULL_STRING;

			// send the message entity a play message command, delayed by 1 second
			pMessage->AddSpawnFlags( SF_MESSAGE_ONCE );
			pMessage->SetThink( &CMessage::SUB_CallUseToggle );
			pMessage->SetNextThink( gpGlobals->curtime + 1.0f );
		}
	}
}

//-----------------------------------------------------------------------------
// Purpose: 
// Output : float
//-----------------------------------------------------------------------------
float GetRealTime()
{
	return engine->Time();
}


bool CWorld::GetDisplayTitle() const
{
	return m_bDisplayTitle;
}

bool CWorld::GetStartDark() const
{
	return m_bStartDark;
}

void CWorld::SetDisplayTitle( bool display )
{
	m_bDisplayTitle = display;
}

void CWorld::SetStartDark( bool startdark )
{
	m_bStartDark = startdark;
}

