/***
*
*	Copyright (c) 1996-2002, Valve LLC. All rights reserved.
*	
*	This product contains software technology licensed from Id 
*	Software, Inc. ("Id Technology").  Id Technology (c) 1996 Id Software, Inc. 
*	All Rights Reserved.
*
*   This source code contains proprietary and confidential information of
*   Valve LLC and its suppliers.  Access to this code is restricted to
*   persons who have executed a written SDK license with Valve.  Any access,
*   use or distribution of this code by or to any unlicensed person is illegal.
*
****/
//=========================================================
// monster template
//=========================================================
// UNDONE: Holster weapon?

#include	"extdll.h"
#include	"util.h"
#include	"cbase.h"
#include	"monsters.h"
#include	"talkmonster.h"
#include	"schedule.h"
#include	"defaultai.h"
#include	"scripted.h"
#include	"weapons.h"
#include	"soundent.h"
#include	"barney.h"

//=========================================================
// Monster's Anim Events Go Here
//=========================================================
// first flag is barney dying for scripted sequences?
#define		HELMET_AE_DRAW		( 2 )
#define		HELMET_AE_SHOOT		( 3 )
#define		HELMET_AE_HOLSTER	( 4 )

#define	HELMET_BODY_GUNHOLSTERED	0
#define	HELMET_BODY_GUNDRAWN		1
#define HELMET_BODY_GUNGONE		2

class CHelmet : public CBarney
{
public:
        void Spawn( void );
        void Precache( void );
        void HelmetFireShotgun( void );
        void AlertSound( void );
        void HandleAnimEvent( MonsterEvent_t *pEvent );

        virtual int ObjectCaps( void ) { return CTalkMonster :: ObjectCaps() | FCAP_IMPULSE_USE; }
        int TakeDamage( entvars_t* pevInflictor, entvars_t* pevAttacker, float flDamage, int bitsDamageType);

        void DeclineFollowing( void );

        // Override these to set behavior
        Schedule_t *GetSchedule( void );

        void DeathSound( void );
        void PainSound( void );

        void TalkInit( void );

        void TraceAttack( entvars_t *pevAttacker, float flDamage, Vector vecDir, TraceResult *ptr, int bitsDamageType);
        void Killed( entvars_t *pevAttacker, int iGib );
};

LINK_ENTITY_TO_CLASS( monster_helmet, CHelmet )

extern Schedule_t	slBaFollow[];
extern Schedule_t	slBarneyEnemyDraw[];
extern Schedule_t	slBaFaceTarget[];
extern Schedule_t	slIdleBaStand[];

//=========================================================
// ALertSound - barney says "Freeze!"
//=========================================================
void CHelmet::AlertSound( void )
{
	if( m_hEnemy != 0 )
	{
		if( FOkToSpeak() )
		{
			PlaySentence( "HM_ATTACK", RANDOM_FLOAT( 2.8, 3.2 ), VOL_NORM, ATTN_IDLE );
		}
	}
}

//=========================================================
// BarneyFirePistol - shoots one round from the pistol at
// the enemy barney is facing.
//=========================================================
void CHelmet::HelmetFireShotgun( void )
{
	Vector vecShootOrigin;

	UTIL_MakeVectors( pev->angles );
	vecShootOrigin = pev->origin + Vector( 0, 0, 55 );
	Vector vecShootDir = ShootAtEnemy( vecShootOrigin );

	Vector angDir = UTIL_VecToAngles( vecShootDir );
	SetBlending( 0, angDir.x );
	pev->effects = EF_MUZZLEFLASH;

	FireBullets( 2, vecShootOrigin, vecShootDir, VECTOR_CONE_2DEGREES, 1024, BULLET_MONSTER_12MM );

	int pitchShift = RANDOM_LONG( 0, 20 );
	
	// Only shift about half the time
	if( pitchShift > 10 )
		pitchShift = 0;
	else
		pitchShift -= 5;
	EMIT_SOUND_DYN( ENT( pev ), CHAN_WEAPON, "helmet/ba_attack2.wav", 1, ATTN_NORM, 0, 100 + pitchShift );

	CSoundEnt::InsertSound( bits_SOUND_COMBAT, pev->origin, 384, 0.3 );

	// UNDONE: Reload?
	m_cAmmoLoaded--;// take away a bullet!
}

//=========================================================
// HandleAnimEvent - catches the monster-specific messages
// that occur when tagged animation frames are played.
//
// Returns number of events handled, 0 if none.
//=========================================================
void CHelmet::HandleAnimEvent( MonsterEvent_t *pEvent )
{
	switch( pEvent->event )
	{
	case HELMET_AE_SHOOT:
		HelmetFireShotgun();
		break;
	case HELMET_AE_DRAW:
		// barney's bodygroup switches here so he can pull gun from holster
		pev->body = HELMET_BODY_GUNDRAWN;
		m_fGunDrawn = TRUE;
		break;
	case HELMET_AE_HOLSTER:
		// change bodygroup to replace gun in holster
		pev->body = HELMET_BODY_GUNHOLSTERED;
		m_fGunDrawn = FALSE;
		break;
	default:
		CTalkMonster::HandleAnimEvent( pEvent );
	}
}

//=========================================================
// Spawn
//=========================================================
void CHelmet::Spawn()
{
	Precache();

	SET_MODEL( ENT( pev ), "models/helmet.mdl" );
	UTIL_SetSize( pev, VEC_HUMAN_HULL_MIN, VEC_HUMAN_HULL_MAX );

	pev->solid = SOLID_SLIDEBOX;
	pev->movetype = MOVETYPE_STEP;
	m_bloodColor = BLOOD_COLOR_RED;
	pev->health = gSkillData.barneyHealth;
	pev->view_ofs = Vector ( 0, 0, 50 );// position of the eyes relative to monster's origin.
	m_flFieldOfView = VIEW_FIELD_WIDE; // NOTE: we need a wide field of view so npc will notice player and say hello
	m_MonsterState = MONSTERSTATE_NONE;

	pev->body = 0; // gun in holster
	m_fGunDrawn = FALSE;

	m_afCapability = bits_CAP_HEAR | bits_CAP_TURN_HEAD | bits_CAP_DOORS_GROUP;

	MonsterInit();
	SetUse( &CTalkMonster::FollowerUse );
}

//=========================================================
// Precache - precaches all resources this monster needs
//=========================================================
void CHelmet::Precache()
{
	PRECACHE_MODEL( "models/helmet.mdl" );

	PRECACHE_SOUND( "helmet/ba_attack1.wav" );
	PRECACHE_SOUND( "helmet/ba_attack2.wav" );

	PRECACHE_SOUND( "helmet/ba_pain1.wav" );
	PRECACHE_SOUND( "helmet/ba_pain2.wav" );
	PRECACHE_SOUND( "helmet/ba_pain3.wav" );

	PRECACHE_SOUND( "helmet/ba_die1.wav" );
	PRECACHE_SOUND( "helmet/ba_die2.wav" );
	PRECACHE_SOUND( "helmet/ba_die3.wav" );

	// every new barney must call this, otherwise
	// when a level is loaded, nobody will talk (time is reset to 0)
	TalkInit();
	CTalkMonster::Precache();
}	

// Init talk data
void CHelmet::TalkInit()
{
	CTalkMonster::TalkInit();

	// scientists speach group names (group names are in sentences.txt)
	m_szGrp[TLK_ANSWER] = "HM_ANSWER";
	m_szGrp[TLK_QUESTION] =	"HM_QUESTION";
	m_szGrp[TLK_IDLE] = "HM_IDLE";
	m_szGrp[TLK_STARE] = "HM_STARE";
	m_szGrp[TLK_USE] = "HM_OK";
	m_szGrp[TLK_UNUSE] = "HM_WAIT";
	m_szGrp[TLK_STOP] = "HM_STOP";

	m_szGrp[TLK_NOSHOOT] = "HM_SCARED";
	m_szGrp[TLK_HELLO] = "HM_HELLO";

	m_szGrp[TLK_PLHURT1] = "!HM_CUREA";
	m_szGrp[TLK_PLHURT2] = "!HM_CUREB"; 
	m_szGrp[TLK_PLHURT3] = "!HM_CUREC";

	m_szGrp[TLK_PHELLO] = NULL;	//"HM_PHELLO";		// UNDONE
	m_szGrp[TLK_PIDLE] = NULL;	//"HM_PIDLE";			// UNDONE
	m_szGrp[TLK_PQUESTION] = "HM_PQUEST";		// UNDONE

	m_szGrp[TLK_SMELL] = "HM_SMELL";

	m_szGrp[TLK_WOUND] = "HM_WOUND";
	m_szGrp[TLK_MORTAL] = "HM_MORTAL";

	// get voice for head - just one barney voice for now
	m_voicePitch = 100;
}

static BOOL IsFacing( entvars_t *pevTest, const Vector &reference )
{
	Vector vecDir = reference - pevTest->origin;
	vecDir.z = 0;
	vecDir = vecDir.Normalize();
	Vector forward, angle;
	angle = pevTest->v_angle;
	angle.x = 0;
	UTIL_MakeVectorsPrivate( angle, forward, NULL, NULL );

	// He's facing me, he meant it
	if( DotProduct( forward, vecDir ) > 0.96f )	// +/- 15 degrees or so
	{
		return TRUE;
	}
	return FALSE;
}

int CHelmet::TakeDamage( entvars_t *pevInflictor, entvars_t *pevAttacker, float flDamage, int bitsDamageType )
{
	// make sure friends talk about it if player hurts talkmonsters...
	int ret = CTalkMonster::TakeDamage( pevInflictor, pevAttacker, flDamage, bitsDamageType );
	if( !IsAlive() || pev->deadflag == DEAD_DYING )
		return ret;

	if( m_MonsterState != MONSTERSTATE_PRONE && ( pevAttacker->flags & FL_CLIENT ) )
	{
		m_flPlayerDamage += flDamage;

		// This is a heurstic to determine if the player intended to harm me
		// If I have an enemy, we can't establish intent (may just be crossfire)
		if( m_hEnemy == 0 )
		{
			// If the player was facing directly at me, or I'm already suspicious, get mad
			if( ( m_afMemory & bits_MEMORY_SUSPICIOUS ) || IsFacing( pevAttacker, pev->origin ) )
			{
				// Alright, now I'm pissed!
				PlaySentence( "HM_MAD", 4, VOL_NORM, ATTN_NORM );

				Remember( bits_MEMORY_PROVOKED );
				StopFollowing( TRUE );
			}
			else
			{
				// Hey, be careful with that
				PlaySentence( "HM_SHOT", 4, VOL_NORM, ATTN_NORM );
				Remember( bits_MEMORY_SUSPICIOUS );
			}
		}
		else if( !( m_hEnemy->IsPlayer()) && pev->deadflag == DEAD_NO )
		{
			PlaySentence( "HM_SHOT", 4, VOL_NORM, ATTN_NORM );
		}
	}

	return ret;
}

//=========================================================
// PainSound
//=========================================================
void CHelmet::PainSound( void )
{
	if( gpGlobals->time < m_painTime )
		return;

	m_painTime = gpGlobals->time + RANDOM_FLOAT( 0.5, 0.75 );

	switch( RANDOM_LONG( 0, 2 ) )
	{
	case 0:
		EMIT_SOUND_DYN( ENT( pev ), CHAN_VOICE, "helmet/ba_pain1.wav", 1, ATTN_NORM, 0, GetVoicePitch() );
		break;
	case 1:
		EMIT_SOUND_DYN( ENT( pev ), CHAN_VOICE, "helmet/ba_pain2.wav", 1, ATTN_NORM, 0, GetVoicePitch() );
		break;
	case 2:
		EMIT_SOUND_DYN( ENT( pev ), CHAN_VOICE, "helmet/ba_pain3.wav", 1, ATTN_NORM, 0, GetVoicePitch() );
		break;
	}
}

//=========================================================
// DeathSound 
//=========================================================
void CHelmet::DeathSound( void )
{
	switch( RANDOM_LONG( 0, 2 ) )
	{
	case 0:
		EMIT_SOUND_DYN( ENT( pev ), CHAN_VOICE, "helmet/ba_die1.wav", 1, ATTN_NORM, 0, GetVoicePitch() );
		break;
	case 1:
		EMIT_SOUND_DYN( ENT( pev ), CHAN_VOICE, "helmet/ba_die2.wav", 1, ATTN_NORM, 0, GetVoicePitch() );
		break;
	case 2:
		EMIT_SOUND_DYN( ENT( pev ), CHAN_VOICE, "helmet/ba_die3.wav", 1, ATTN_NORM, 0, GetVoicePitch() );
		break;
	}
}

void CHelmet::TraceAttack( entvars_t *pevAttacker, float flDamage, Vector vecDir, TraceResult *ptr, int bitsDamageType )
{
	switch( ptr->iHitgroup )
	{
	case HITGROUP_CHEST:
	case HITGROUP_STOMACH:
		if (bitsDamageType & ( DMG_BULLET | DMG_SLASH | DMG_BLAST ) )
		{
			flDamage = flDamage / 2;
		}
		break;
	case 10:
		if( bitsDamageType & ( DMG_BULLET | DMG_SLASH | DMG_CLUB ) )
		{
			flDamage -= 20;
			if( flDamage <= 0 )
			{
				UTIL_Ricochet( ptr->vecEndPos, 1.0 );
				flDamage = 0.01f;
			}
		}

		// always a head shot
		ptr->iHitgroup = HITGROUP_HEAD;
		break;
	}

	CTalkMonster::TraceAttack( pevAttacker, flDamage, vecDir, ptr, bitsDamageType );
}

void CHelmet::Killed( entvars_t *pevAttacker, int iGib )
{
	if( pev->body < HELMET_BODY_GUNGONE )
	{
		// drop the gun!
		Vector vecGunPos;
		Vector vecGunAngles;

		pev->body = HELMET_BODY_GUNGONE;

		GetAttachment( 0, vecGunPos, vecGunAngles );

		DropItem( "weapon_shotgun", vecGunPos, vecGunAngles );
	}

	SetUse( NULL );	
	CTalkMonster::Killed( pevAttacker, iGib );
}

//=========================================================
// GetSchedule - Decides which type of schedule best suits
// the monster's current state and conditions. Then calls
// monster's member function to get a pointer to a schedule
// of the proper type.
//=========================================================
Schedule_t *CHelmet::GetSchedule( void )
{
	if( HasConditions( bits_COND_HEAR_SOUND ) )
	{
		CSound *pSound;
		pSound = PBestSound();

		ASSERT( pSound != NULL );
		if( pSound && (pSound->m_iType & bits_SOUND_DANGER) )
			return GetScheduleOfType( SCHED_TAKE_COVER_FROM_BEST_SOUND );
	}
	if( HasConditions( bits_COND_ENEMY_DEAD ) && FOkToSpeak() )
	{
		PlaySentence( "HM_KILL", 4, VOL_NORM, ATTN_NORM );
	}

	switch( m_MonsterState )
	{
	case MONSTERSTATE_COMBAT:
		{
			// dead enemy
			if( HasConditions( bits_COND_ENEMY_DEAD ) )
			{
				// call base class, all code to handle dead enemies is centralized there.
				return CBaseMonster::GetSchedule();
			}

			// always act surprized with a new enemy
			if( HasConditions( bits_COND_NEW_ENEMY ) && HasConditions( bits_COND_LIGHT_DAMAGE ) )
				return GetScheduleOfType( SCHED_SMALL_FLINCH );

			// wait for one schedule to draw gun
			if( !m_fGunDrawn )
				return GetScheduleOfType( SCHED_ARM_WEAPON );

			if( HasConditions( bits_COND_HEAVY_DAMAGE ) )
				return GetScheduleOfType( SCHED_TAKE_COVER_FROM_ENEMY );
		}
		break;
	case MONSTERSTATE_ALERT:	
	case MONSTERSTATE_IDLE:
		if( HasConditions( bits_COND_LIGHT_DAMAGE | bits_COND_HEAVY_DAMAGE ) )
		{
			// flinch if hurt
			return GetScheduleOfType( SCHED_SMALL_FLINCH );
		}

		if( m_hEnemy == 0 && IsFollowing() )
		{
			if( !m_hTargetEnt->IsAlive() )
			{
				// UNDONE: Comment about the recently dead player here?
				StopFollowing( FALSE );
				break;
			}
			else
			{
				if( HasConditions( bits_COND_CLIENT_PUSH ) )
				{
					return GetScheduleOfType( SCHED_MOVE_AWAY_FOLLOW );
				}
				return GetScheduleOfType( SCHED_TARGET_FACE );
			}
		}

		if( HasConditions( bits_COND_CLIENT_PUSH ) )
		{
			return GetScheduleOfType( SCHED_MOVE_AWAY );
		}

		// try to say something about smells
		TrySmellTalk();
		break;
	default:
		break;
	}

	return CTalkMonster::GetSchedule();
}

void CHelmet::DeclineFollowing( void )
{
	PlaySentence( "HM_POK", 2, VOL_NORM, ATTN_NORM );
}

//=========================================================
// DEAD BARNEY PROP
//
// Designer selects a pose in worldcraft, 0 through num_poses-1
// this value is added to what is selected as the 'first dead pose'
// among the monster's normal animations. All dead poses must
// appear sequentially in the model file. Be sure and set
// the m_iFirstPose properly!
//
//=========================================================
class CDeadHelmet : public CBaseMonster
{
public:
	void Spawn( void );
	int Classify( void ) { return CLASS_PLAYER_ALLY; }

	void KeyValue( KeyValueData *pkvd );

	int m_iPose;// which sequence to display	-- temporary, don't need to save
	static const char *m_szPoses[3];
};

const char *CDeadHelmet::m_szPoses[] = { "lying_on_back", "lying_on_side", "lying_on_stomach" };

void CDeadHelmet::KeyValue( KeyValueData *pkvd )
{
	if( FStrEq( pkvd->szKeyName, "pose" ) )
	{
		m_iPose = atoi( pkvd->szValue );
		pkvd->fHandled = TRUE;
	}
	else
		CBaseMonster::KeyValue( pkvd );
}

LINK_ENTITY_TO_CLASS( monster_helmet_dead, CDeadHelmet )

//=========================================================
// ********** DeadBarney SPAWN **********
//=========================================================
void CDeadHelmet::Spawn()
{
	PRECACHE_MODEL( "models/helmet.mdl" );
	SET_MODEL( ENT( pev ), "models/helmet.mdl" );

	pev->effects = 0;
	pev->yaw_speed = 8;
	pev->sequence = 0;
	m_bloodColor = BLOOD_COLOR_RED;

	pev->sequence = LookupSequence( m_szPoses[m_iPose] );
	if( pev->sequence == -1 )
	{
		ALERT( at_console, "Dead helmet with bad pose\n" );
	}
	// Corpses have less health
	pev->health = 8;//gSkillData.barneyHealth;

	MonsterInitDead();
}