/***
*
*	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.
*
*   Use, distribution, and modification of this source code and/or resulting
*   object code is restricted to non-commercial enhancements to products from
*   Valve LLC.  All other use, distribution, or modification is prohibited
*   without written permission from Valve LLC.
*
****/

#include "extdll.h"
#include "util.h"
#include "cbase.h"
#include "monsters.h"
#include "weapons.h"
#include "nodes.h"
#include "player.h"
#include "soundent.h"
#include "gamerules.h"

enum w_squeak_e {
	WSQUEAK_IDLE1 = 0,
	WSQUEAK_FIDGET,
	WSQUEAK_JUMP,
	WSQUEAK_RUN,
};

class CSqueakGrenade : public CGrenade
{
	void Spawn( void );
	void Precache( void );
	int  Classify( void );
	void EXPORT SuperBounceTouch( CBaseEntity *pOther );
	void EXPORT HuntThink( void );
	int  BloodColor( void ) { return BLOOD_COLOR_YELLOW; }
	void Killed( entvars_t *pevAttacker, int iGib );
	void GibMonster( void );

	virtual int		Save( CSave &save ); 
	virtual int		Restore( CRestore &restore );
	
	static	TYPEDESCRIPTION m_SaveData[];

	static float m_flNextBounceSoundTime;

	// CBaseEntity *m_pTarget;
	float m_flDie;
	Vector m_vecTarget;
	float m_flNextHunt;
	float m_flNextHit;
	Vector m_posPrev;
	EHANDLE m_hOwner;
	int  m_iMyClass;
};

float CSqueakGrenade::m_flNextBounceSoundTime = 0;

LINK_ENTITY_TO_CLASS( monster_snark, CSqueakGrenade );
TYPEDESCRIPTION	CSqueakGrenade::m_SaveData[] = 
{
	DEFINE_FIELD( CSqueakGrenade, m_flDie, FIELD_TIME ),
	DEFINE_FIELD( CSqueakGrenade, m_vecTarget, FIELD_VECTOR ),
	DEFINE_FIELD( CSqueakGrenade, m_flNextHunt, FIELD_TIME ),
	DEFINE_FIELD( CSqueakGrenade, m_flNextHit, FIELD_TIME ),
	DEFINE_FIELD( CSqueakGrenade, m_posPrev, FIELD_POSITION_VECTOR ),
	DEFINE_FIELD( CSqueakGrenade, m_hOwner, FIELD_EHANDLE ),
};

IMPLEMENT_SAVERESTORE( CSqueakGrenade, CGrenade );

#define SQUEEK_DETONATE_DELAY	15.0

int CSqueakGrenade :: Classify ( void )
{
	if (m_iClass) return m_iClass;

	if (m_iMyClass != 0)
		return m_iMyClass; // protect against recursion

	if (m_hEnemy != NULL)
	{
		m_iMyClass = CLASS_INSECT; // no one cares about it
		switch( m_hEnemy->Classify( ) )
		{
			case CLASS_PLAYER:
			case CLASS_HUMAN_PASSIVE:
			case CLASS_HUMAN_MILITARY:
				m_iMyClass = 0;
				return CLASS_ALIEN_MILITARY; // barney's get mad, grunts get mad at it
		}
		m_iMyClass = 0;
	}

	return CLASS_ALIEN_BIOWEAPON;
}

void CSqueakGrenade :: Spawn( void )
{
	Precache( );
	// motor
	pev->movetype = MOVETYPE_BOUNCE;
	pev->solid = SOLID_BBOX;

	SET_MODEL(ENT(pev), "models/w_squeak.mdl");
	UTIL_SetSize(pev, Vector( -4, -4, 0), Vector(4, 4, 8));
	UTIL_SetOrigin( this, pev->origin );

	SetTouch(&CSqueakGrenade :: SuperBounceTouch );
	SetThink(&CSqueakGrenade :: HuntThink );
	SetNextThink( 0.1 );
	m_flNextHunt = gpGlobals->time + 1E6;

	pev->flags |= FL_MONSTER;
	pev->takedamage		= DAMAGE_AIM;
	if (pev->health == 0)
		pev->health			= gSkillData.snarkHealth;
	pev->gravity		= 0.5;
	pev->friction		= 0.5;

	pev->dmg = gSkillData.snarkDmgPop;

	m_flDie = gpGlobals->time + SQUEEK_DETONATE_DELAY;

	m_flFieldOfView = 0; // 180 degrees

	if ( pev->owner )
		m_hOwner = Instance( pev->owner );

	m_flNextBounceSoundTime = gpGlobals->time;// reset each time a snark is spawned.

	pev->sequence = WSQUEAK_RUN;
	ResetSequenceInfo( );
}

void CSqueakGrenade::Precache( void )
{
	PRECACHE_MODEL("models/w_squeak.mdl");
	PRECACHE_SOUND("squeek/sqk_blast1.wav");
	PRECACHE_SOUND("common/bodysplat.wav");
	PRECACHE_SOUND("squeek/sqk_die1.wav");
	PRECACHE_SOUND("squeek/sqk_hunt1.wav");
	PRECACHE_SOUND("squeek/sqk_hunt2.wav");
	PRECACHE_SOUND("squeek/sqk_hunt3.wav");
	PRECACHE_SOUND("squeek/sqk_deploy1.wav");
}


void CSqueakGrenade :: Killed( entvars_t *pevAttacker, int iGib )
{
	pev->model = iStringNull;// make invisible
	SetThink(&CSqueakGrenade :: SUB_Remove );
	SetTouch( NULL );
	SetNextThink( 0.1 );

	// since squeak grenades never leave a body behind, clear out their takedamage now.
	// Squeaks do a bit of radius damage when they pop, and that radius damage will
	// continue to call this function unless we acknowledge the Squeak's death now. (sjb)
	pev->takedamage = DAMAGE_NO;

	// play squeek blast
	EMIT_SOUND_DYN(ENT(pev), CHAN_ITEM, "squeek/sqk_blast1.wav", 1, 0.5, 0, PITCH_NORM);	

	CSoundEnt::InsertSound ( bits_SOUND_COMBAT, pev->origin, SMALL_EXPLOSION_VOLUME, 3.0 );

	UTIL_BloodDrips( pev->origin, g_vecZero, BloodColor(), 80 );

	if (m_hOwner != NULL)
		RadiusDamage ( pev, m_hOwner->pev, pev->dmg, CLASS_NONE, DMG_BLAST );
	else
		RadiusDamage ( pev, pev, pev->dmg, CLASS_NONE, DMG_BLAST );

	// reset owner so death message happens
	if (m_hOwner != NULL)
		pev->owner = m_hOwner->edict();

	CBaseMonster :: Killed( pevAttacker, GIB_ALWAYS );
}

void CSqueakGrenade :: GibMonster( void )
{
	EMIT_SOUND_DYN(ENT(pev), CHAN_VOICE, "common/bodysplat.wav", 0.75, ATTN_NORM, 0, 200);		
}



void CSqueakGrenade::HuntThink( void )
{
	// ALERT( at_console, "think\n" );

	if (!IsInWorld())
	{
		SetTouch( NULL );
		UTIL_Remove( this );
		return;
	}
	
	StudioFrameAdvance( );
	SetNextThink( 0.1 );

	// explode when ready
	if (gpGlobals->time >= m_flDie)
	{
		g_vecAttackDir = pev->velocity.Normalize( );
		pev->health = -1;
		Killed( pev, 0 );
		return;
	}

	// float
	if (pev->waterlevel != 0 && pev->watertype != CONTENTS_FOG)
	{
		if (pev->movetype == MOVETYPE_BOUNCE)
		{
			pev->movetype = MOVETYPE_FLY;
		}
		pev->velocity = pev->velocity * 0.9;
		pev->velocity.z += 8.0;
	}
	else if (pev->movetype = MOVETYPE_FLY)
	{
		pev->movetype = MOVETYPE_BOUNCE;
	}

	// return if not time to hunt
	if (m_flNextHunt > gpGlobals->time)
		return;

	m_flNextHunt = gpGlobals->time + 2.0;
	
	CBaseEntity *pOther = NULL;
	Vector vecDir;
	TraceResult tr;

	Vector vecFlat = pev->velocity;
	vecFlat.z = 0;
	vecFlat = vecFlat.Normalize( );

	UTIL_MakeVectors( pev->angles );

	if (m_hEnemy == NULL || !m_hEnemy->IsAlive())
	{
		// find target, bounce a bit towards it.
		Look( 512 );
		m_hEnemy = BestVisibleEnemy( );
	}

	// squeek if it's about time blow up
	if ((m_flDie - gpGlobals->time <= 0.5) && (m_flDie - gpGlobals->time >= 0.3))
	{
		EMIT_SOUND_DYN(ENT(pev), CHAN_VOICE, "squeek/sqk_die1.wav", 1, ATTN_NORM, 0, 100 + RANDOM_LONG(0,0x3F));
		CSoundEnt::InsertSound ( bits_SOUND_COMBAT, pev->origin, 256, 0.25 );
	}

	// higher pitch as squeeker gets closer to detonation time
	float flpitch = 155.0 - 60.0 * ((m_flDie - gpGlobals->time) / SQUEEK_DETONATE_DELAY);
	if (flpitch < 80)
		flpitch = 80;

	if (m_hEnemy != NULL)
	{
		if (FVisible( m_hEnemy ))
		{
			vecDir = m_hEnemy->EyePosition() - pev->origin;
			m_vecTarget = vecDir.Normalize( );
		}

		float flVel = pev->velocity.Length();
		float flAdj = 50.0 / (flVel + 10.0);

		if (flAdj > 1.2)
			flAdj = 1.2;
		
		// ALERT( at_console, "think : enemy\n");

		// ALERT( at_console, "%.0f %.2f %.2f %.2f\n", flVel, m_vecTarget.x, m_vecTarget.y, m_vecTarget.z );

		pev->velocity = pev->velocity * flAdj + m_vecTarget * 300;
	}

	if (pev->flags & FL_ONGROUND)
	{
		pev->avelocity = Vector( 0, 0, 0 );
	}
	else
	{
		if (pev->avelocity == Vector( 0, 0, 0))
		{
			pev->avelocity.x = RANDOM_FLOAT( -100, 100 );
			pev->avelocity.z = RANDOM_FLOAT( -100, 100 );
		}
	}

	if ((pev->origin - m_posPrev).Length() < 1.0)
	{
		pev->velocity.x = RANDOM_FLOAT( -100, 100 );
		pev->velocity.y = RANDOM_FLOAT( -100, 100 );
	}
	m_posPrev = pev->origin;

	pev->angles = UTIL_VecToAngles( pev->velocity );
	pev->angles.z = 0;
	pev->angles.x = 0;
}


void CSqueakGrenade::SuperBounceTouch( CBaseEntity *pOther )
{
	float	flpitch;

	TraceResult tr = UTIL_GetGlobalTrace( );

	// don't hit the guy that launched this grenade
	if ( pev->owner && pOther->edict() == pev->owner )
		return;

	// at least until we've bounced once
	pev->owner = NULL;

	pev->angles.x = 0;
	pev->angles.z = 0;

	// avoid bouncing too much
	if (m_flNextHit > gpGlobals->time)
		return;

	// higher pitch as squeeker gets closer to detonation time
	flpitch = 155.0 - 60.0 * ((m_flDie - gpGlobals->time) / SQUEEK_DETONATE_DELAY);

	if ( pOther->pev->takedamage && m_flNextAttack < gpGlobals->time )
	{
		// attack!

		// make sure it's me who has touched them
		if (tr.pHit == pOther->edict())
		{
			// and it's not another squeakgrenade
			if (tr.pHit->v.modelindex != pev->modelindex)
			{
				// ALERT( at_console, "hit enemy\n");
				ClearMultiDamage( );
				pOther->TraceAttack(pev, gSkillData.snarkDmgBite, gpGlobals->v_forward, &tr, DMG_SLASH ); 
				if (m_hOwner != NULL)
					ApplyMultiDamage( pev, m_hOwner->pev );
				else
					ApplyMultiDamage( pev, pev );

				pev->dmg += gSkillData.snarkDmgPop; // add more explosion damage
				// m_flDie += 2.0; // add more life

				// make bite sound
				EMIT_SOUND_DYN(ENT(pev), CHAN_WEAPON, "squeek/sqk_deploy1.wav", 1.0, ATTN_NORM, 0, (int)flpitch);
				m_flNextAttack = gpGlobals->time + 0.5;
			}
		}
		else
		{
			// ALERT( at_console, "been hit\n");
		}
	}

	m_flNextHit = gpGlobals->time + 0.1;
	m_flNextHunt = gpGlobals->time;

	if ( g_pGameRules->IsMultiplayer() )
	{
		// in multiplayer, we limit how often snarks can make their bounce sounds to prevent overflows.
		if ( gpGlobals->time < m_flNextBounceSoundTime )
		{
			// too soon!
			return;
		}
	}

	if (!(pev->flags & FL_ONGROUND))
	{
		// play bounce sound
		float flRndSound = RANDOM_FLOAT ( 0 , 1 );

		if ( flRndSound <= 0.33 )
			EMIT_SOUND_DYN(ENT(pev), CHAN_VOICE, "squeek/sqk_hunt1.wav", 1, ATTN_NORM, 0, (int)flpitch);		
		else if (flRndSound <= 0.66)
			EMIT_SOUND_DYN(ENT(pev), CHAN_VOICE, "squeek/sqk_hunt2.wav", 1, ATTN_NORM, 0, (int)flpitch);
		else 
			EMIT_SOUND_DYN(ENT(pev), CHAN_VOICE, "squeek/sqk_hunt3.wav", 1, ATTN_NORM, 0, (int)flpitch);
		CSoundEnt::InsertSound ( bits_SOUND_COMBAT, pev->origin, 256, 0.25 );
	}
	else
	{
		// skittering sound
		CSoundEnt::InsertSound ( bits_SOUND_COMBAT, pev->origin, 100, 0.1 );
	}

	m_flNextBounceSoundTime = gpGlobals->time + 0.5;// half second.
}