/***
*
*	Copyright (c) 1999, 2000 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 "gamerules.h"


#define	KNIFE_BODYHIT_VOLUME 128
#define	KNIFE_WALLHIT_VOLUME 512

#include "Dagger.h"

LINK_ENTITY_TO_CLASS( weapon_knife, CKnife );



enum knife_e {
	KNIFE_IDLE = 0,
	KNIFE_DRAW,
	KNIFE_HOLSTER,
	KNIFE_ATTACK1,
	KNIFE_ATTACK2
};


void CKnife::Spawn( )
{
	Precache( );
	m_iId = WEAPON_KNIFE;
	SET_MODEL(ENT(pev), "models/w_knife.mdl");
	m_iClip = -1;

	FallInit();// get ready to fall down.
}


void CKnife::Precache( void )
{
	PRECACHE_MODEL("models/v_knife.mdl");
	PRECACHE_MODEL("models/w_knife.mdl");
//	PRECACHE_MODEL("models/p_knife.mdl");
	PRECACHE_SOUND("weapons/cbar_hit1.wav");
	PRECACHE_SOUND("weapons/cbar_hit2.wav");
	PRECACHE_SOUND("weapons/cbar_hitbod1.wav");
	PRECACHE_SOUND("weapons/cbar_hitbod2.wav");
	PRECACHE_SOUND("weapons/cbar_hitbod3.wav");
	PRECACHE_SOUND("weapons/cbar_miss1.wav");
}

int CKnife::GetItemInfo(ItemInfo *p)
{
	p->pszName = STRING(pev->classname);
	p->pszAmmo1 = NULL;
	p->iMaxAmmo1 = -1;
	p->pszAmmo2 = NULL;
	p->iMaxAmmo2 = -1;
	p->iMaxClip = WEAPON_NOCLIP;
	p->iSlot = 0;
	p->iPosition = 0;
	p->iId = WEAPON_KNIFE;
	p->iWeight = KNIFE_WEIGHT;
	return 1;
}


BOOL CKnife::Deploy( )
{
	return DefaultDeploy( "models/v_knife.mdl", "", KNIFE_DRAW, "knife" );
}

void CKnife::Holster( int skiplocal /* = 0 */ )
{
	m_pPlayer->m_flNextAttack = UTIL_WeaponTimeBase() + 0.5;
	SendWeaponAnim( KNIFE_HOLSTER );
}

int CKnife::AddToPlayer( CBasePlayer *pPlayer )
{
	if ( CBasePlayerWeapon::AddToPlayer( pPlayer ) )
	{
		MESSAGE_BEGIN( MSG_ONE, gmsgWeapPickup, NULL, pPlayer->pev );
			WRITE_BYTE( m_iId );
		MESSAGE_END();
		return TRUE;
	}
	return FALSE;
}


void CKnife::FindHullIntersection( const Vector &vecSrc, TraceResult &tr, float *mins, float *maxs, edict_t *pEntity )
{
	int			i, j, k;
	float		distance;
	float		*minmaxs[2] = {mins, maxs};
	TraceResult tmpTrace;
	Vector		vecHullEnd = tr.vecEndPos;
	Vector		vecEnd;

	distance = 1e6f;

	vecHullEnd = vecSrc + ((vecHullEnd - vecSrc)*2);
	UTIL_TraceLine( vecSrc, vecHullEnd, dont_ignore_monsters, pEntity, &tmpTrace );
	if ( tmpTrace.flFraction < 1.0 )
	{
		tr = tmpTrace;
		return;
	}

	for ( i = 0; i < 2; i++ )
	{
		for ( j = 0; j < 2; j++ )
		{
			for ( k = 0; k < 2; k++ )
			{
				vecEnd.x = vecHullEnd.x + minmaxs[i][0];
				vecEnd.y = vecHullEnd.y + minmaxs[j][1];
				vecEnd.z = vecHullEnd.z + minmaxs[k][2];

				UTIL_TraceLine( vecSrc, vecEnd, dont_ignore_monsters, pEntity, &tmpTrace );
				if ( tmpTrace.flFraction < 1.0 )
				{
					float thisDistance = (tmpTrace.vecEndPos - vecSrc).Length();
					if ( thisDistance < distance )
					{
						tr = tmpTrace;
						distance = thisDistance;
					}
				}
			}
		}
	}
}


void CKnife::PrimaryAttack()
{
	if (! Swing( 1 ))
	{
		SetThink( SwingAgain );
		SetNextThink( 0.5 );
	}
}


void CKnife::SwingAgain( void )
{
	Swing( 0 );
	DontThink();
}


int CKnife::Swing( int fFirst )
{
	int fDidHit = FALSE;

	TraceResult tr;

	UTIL_MakeVectors (m_pPlayer->pev->v_angle);
	Vector vecSrc	= m_pPlayer->GetGunPosition( );
	Vector vecEnd	= vecSrc + gpGlobals->v_forward * 32;

	UTIL_TraceLine( vecSrc, vecEnd, dont_ignore_monsters, ENT( m_pPlayer->pev ), &tr );

	if ( tr.flFraction >= 1.0 )
	{
		UTIL_TraceHull( vecSrc, vecEnd, dont_ignore_monsters, head_hull, ENT( m_pPlayer->pev ), &tr );
		if ( tr.flFraction < 1.0 )
		{
			// Calculate the point of intersection of the line (or hull) and the object we hit
			// This is and approximation of the "best" intersection
			CBaseEntity *pHit = CBaseEntity::Instance( tr.pHit );
			if ( !pHit || pHit->IsBSPModel() )
				FindHullIntersection( vecSrc, tr, VEC_DUCK_HULL_MIN, VEC_DUCK_HULL_MAX, m_pPlayer->edict() );
			vecEnd = tr.vecEndPos;	// This is the point on the actual surface (the hull could have hit space)
		}
	}

	if ( tr.flFraction >= 1.0 )
	{
		if (fFirst)
		{
			// miss
			switch( (m_iSwing++) % 3 )
			{
			case 0:
				SendWeaponAnim( KNIFE_ATTACK1 ); break;
			case 1:
				SendWeaponAnim( KNIFE_ATTACK2 ); break;
			default:
				SendWeaponAnim( KNIFE_ATTACK1 ); break;
			}
			m_flNextPrimaryAttack = gpGlobals->time + 0.5;
			// play wiff or swish sound
			EMIT_SOUND_DYN(ENT(m_pPlayer->pev), CHAN_WEAPON, "weapons/cbar_miss1.wav", 1, ATTN_NORM, 0, 94 + RANDOM_LONG(0,0xF));

			// player "shoot" animation
			m_pPlayer->SetAnimation( PLAYER_ATTACK1 );
		}
	}
	else
	{
		// hit
		fDidHit = TRUE;

		CBaseEntity *pEntity = CBaseEntity::Instance(tr.pHit);

		switch( ((m_iSwing++) % 2) + 1 )
		{
		case 0:
			SendWeaponAnim( KNIFE_ATTACK1); break;
		case 1:
			SendWeaponAnim( KNIFE_ATTACK2 ); break;
		default:
			SendWeaponAnim( KNIFE_ATTACK1 ); break;
		}

		// player "shoot" animation
		m_pPlayer->SetAnimation( PLAYER_ATTACK1 );

		ClearMultiDamage( );
		if ( (m_flNextPrimaryAttack + 1 < gpGlobals->time) || g_pGameRules->IsMultiplayer() )
		{
			// first swing does full damage
			pEntity->TraceAttack(m_pPlayer->pev, gSkillData.plrDmgKnife, gpGlobals->v_forward, &tr, DMG_SLASH ); 
		}
		else
		{
			// subsequent swings do half
			pEntity->TraceAttack(m_pPlayer->pev, gSkillData.plrDmgKnife / 2, gpGlobals->v_forward, &tr, DMG_SLASH ); 
		}	
		ApplyMultiDamage( m_pPlayer->pev, m_pPlayer->pev );

		m_flNextPrimaryAttack = gpGlobals->time + 0.5;

		// play thwack, or dong sound
		float flVol = 1.0;
		int fHitWorld = TRUE;

		if (pEntity)
		{
			if (pEntity->Classify() != CLASS_NONE && pEntity->Classify() != CLASS_MACHINE)
			{
				// play thwack sound
				switch( RANDOM_LONG(0,2) )
				{
				case 0:
					EMIT_SOUND(ENT(m_pPlayer->pev), CHAN_WEAPON, "weapons/cbar_hitbod1.wav", 1, ATTN_NORM); break;
				case 1:
					EMIT_SOUND(ENT(m_pPlayer->pev), CHAN_WEAPON, "weapons/cbar_hitbod2.wav", 1, ATTN_NORM); break;
				case 2:
					EMIT_SOUND(ENT(m_pPlayer->pev), CHAN_WEAPON, "weapons/cbar_hitbod3.wav", 1, ATTN_NORM); break;
				}
				m_pPlayer->m_iWeaponVolume = KNIFE_BODYHIT_VOLUME;
				if (!pEntity->IsAlive() )
					return TRUE;
				else
					flVol = 0.1;

				fHitWorld = FALSE;
			}
		}

		// play texture hit sound
		// UNDONE: Calculate the correct point of intersection when we hit with the hull instead of the line

		if (fHitWorld)
		{
			float fvolbar = TEXTURETYPE_PlaySound(&tr, vecSrc, vecSrc + (vecEnd-vecSrc)*2, BULLET_PLAYER_KNIFE);

			if ( g_pGameRules->IsMultiplayer() )
			{
				// override the volume here, cause we don't play texture sounds in multiplayer, 
				// and fvolbar is going to be 0 from the above call.

				fvolbar = 1;
			}

			// also play Knife strike
			switch( RANDOM_LONG(0,1) )
			{
			case 0:
				//UTIL_EmitAmbientSound(ENT(0), ptr->vecEndPos, "weapons/dagger_hit1.wav", fvolbar, ATTN_NORM, 0, 98 + RANDOM_LONG(0,3));
				EMIT_SOUND_DYN(ENT(m_pPlayer->pev), CHAN_ITEM, "weapons/cbar_hit1.wav", fvolbar, ATTN_NORM, 0, 98 + RANDOM_LONG(0,3)); 
				break;
			case 1:
				//UTIL_EmitAmbientSound(ENT(0), ptr->vecEndPos, "weapons/dagger_hit2.wav", fvolbar, ATTN_NORM, 0, 98 + RANDOM_LONG(0,3));
				EMIT_SOUND_DYN(ENT(m_pPlayer->pev), CHAN_ITEM, "weapons/cbar_hit2.wav", fvolbar, ATTN_NORM, 0, 98 + RANDOM_LONG(0,3)); 
				break;
			}
		}

		// delay the decal a bit
		m_trHit = tr;
		SetNextThink( 0.2 );

		m_pPlayer->m_iWeaponVolume = flVol * KNIFE_WALLHIT_VOLUME;
	}
	return fDidHit;
}

void CKnife::WeaponIdle( void )
{
	if ( m_flTimeWeaponIdle > UTIL_WeaponTimeBase() )
		return;

	m_flTimeWeaponIdle = UTIL_WeaponTimeBase() + (30.0 / 15.0) + RANDOM_FLOAT ( 1, 3 );
	SendWeaponAnim( KNIFE_IDLE, 1 );
}