/*
	Copyright (c) 1999, Cold Ice Modification. 
	
	This code has been written by SlimShady ( darcuri@optonline.net )

    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 and from the Cold Ice team.

    Please if you use this code in any public form, please give us credit.

*/

#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

class CKnife : public CBasePlayerWeapon
{
public:
	void Spawn( void );
	void Precache( void );
	int iItemSlot( void ) { return 1; }
	void EXPORT SwingAgain( void );
	void EXPORT Smack( void );
	int GetItemInfo(ItemInfo *p);
	int AddToPlayer( CBasePlayer *pPlayer );

	int menu_on;

	void PrimaryAttack( void );
	int Swing( int fFirst );
	BOOL Deploy( void );
	void Holster( void );
	int m_iSwing;
	TraceResult m_trHit;
};
LINK_ENTITY_TO_CLASS( weapon_knife, CKnife );



enum knife_e {
	KNIFE_IDLE = 0,
	KNIFE_IDLE1,
	KNIFE_SLASH,
	KNIFE_STAB,
	KNIFE_DRAW,
	KNIFE_HOLSTER,
};


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

	FallInit();
}


void CKnife::Precache( void )
{
	PRECACHE_MODEL("models/vmodels/v_knife.mdl");
	PRECACHE_MODEL("models/wmodels/w_knife.mdl");
	PRECACHE_MODEL("models/pmodels/p_knife.mdl");
}

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 = 1;
	p->iId = WEAPON_KNIFE;
	p->iWeight = KNIFE_WEIGHT;
	return 1;
}

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;
}



BOOL CKnife::Deploy( )
{
	return DefaultDeploy( "models/vmodels/v_knife.mdl", "models/pmodels/p_knife.mdl", KNIFE_DRAW, "crowbar" );
}

void CKnife::Holster( )
{
	m_pPlayer->m_flNextAttack = gpGlobals->time + 0.5;
	SendWeaponAnim( KNIFE_HOLSTER );
}


void FindHullIntersectionKnife( 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 );
		pev->nextthink = gpGlobals->time + 0.1;
	}
}


void CKnife::Smack( )
{
	DecalGunshot( &m_trHit, BULLET_PLAYER_CROWBAR );
}


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


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() )
				FindHullIntersectionKnife( 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_SLASH ); break;
			case 1:
				SendWeaponAnim( KNIFE_STAB ); break;
			case 2:
				SendWeaponAnim( KNIFE_SLASH ); 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_STAB ); break;
		case 1:
			SendWeaponAnim( KNIFE_SLASH ); break;
		case 2:
			SendWeaponAnim( KNIFE_STAB ); 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_CLUB ); 
		}
		else
		{
			// subsequent swings do half
			pEntity->TraceAttack(m_pPlayer->pev, gSkillData.plrDmgKnife / 2, gpGlobals->v_forward, &tr, DMG_CLUB ); 
		}	
		ApplyMultiDamage( m_pPlayer->pev, m_pPlayer->pev );

		m_flNextPrimaryAttack = gpGlobals->time + 0.25;

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

		if (pEntity)
		{
			if (pEntity->Classify() != CLASS_NONE && pEntity->Classify() != CLASS_MACHINE)
			{
				// play thwack or smack 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_CROWBAR);

			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 crowbar strike
			switch( RANDOM_LONG(0,1) )
			{
			case 0:
				//UTIL_EmitAmbientSound(ENT(0), ptr->vecEndPos, "weapons/cbar_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/cbar_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;
		SetThink( Smack );
		pev->nextthink = gpGlobals->time + 0.2;

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