/***
*
*	Copyright (c) 1996-2001, 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"

void FindHullIntersection(const Vector &vecSrc, TraceResult &tr, float *mins, float *maxs, edict_t *pEntity);

#define	KNIFE_BODYHIT_VOLUME 128
#define	KNIFE_WALLHIT_VOLUME 512

LINK_ENTITY_TO_CLASS(weapon_knife, CKnife)

enum knife_e {
	KNIFE_IDLE1 = 0,
	KNIFE_DRAW,
	KNIFE_HOLSTER,
	KNIFE_ATTACK1HIT,
	KNIFE_ATTACK1MISS,
	KNIFE_ATTACK2MISS,
	KNIFE_ATTACK2HIT,
	KNIFE_ATTACK3MISS,
	KNIFE_ATTACK3HIT,
	KNIFE_IDLE2,
	KNIFE_IDLE3,
	KNIFE_CHARGE,
	KNIFE_STAB,
};


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/knife_hit_flesh1.wav");
	PRECACHE_SOUND("weapons/knife_hit_flesh2.wav");
	PRECACHE_SOUND("weapons/knife_hit_wall1.wav");
	PRECACHE_SOUND("weapons/knife_hit_wall2.wav");
	PRECACHE_SOUND("weapons/knife1.wav");
	PRECACHE_SOUND("weapons/knife2.wav");
	PRECACHE_SOUND("weapons/knife3.wav");

	m_usKnife = PRECACHE_EVENT(1, "events/knife.sc");
}

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 = 2;
	p->iId = WEAPON_KNIFE;
	p->iWeight = KNIFE_WEIGHT;
	return 1;
}



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

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

void CKnife::PrimaryAttack()
{
	if (!Swing(1))
	{
#if !CLIENT_DLL
		SetThink(&CKnife::SwingAgain);
		pev->nextthink = gpGlobals->time + 0.1;
#endif
	}
}


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 !CLIENT_DLL
	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)
		}
	}
#endif

	PLAYBACK_EVENT_FULL(FEV_NOTHOST, m_pPlayer->edict(), m_usKnife,
		0.0, (float *)&g_vecZero, (float *)&g_vecZero, 0, 0, 0,
		0.0, 0, 0.0);


	if (tr.flFraction >= 1.0)
	{
		if (fFirst)
		{
			// miss
			m_flNextPrimaryAttack = GetNextAttackDelay(0.5);
#if CROWBAR_IDLE_ANIM
			m_flTimeWeaponIdle = UTIL_WeaponTimeBase() + UTIL_SharedRandomFloat( m_pPlayer->random_seed, 10, 15 );
#endif
			// player "shoot" animation
			m_pPlayer->SetAnimation(PLAYER_ATTACK1);
		}
	}
	else
	{
		switch (((m_iSwing++) % 2) + 1)
		{
		case 0:
			SendWeaponAnim(KNIFE_ATTACK1HIT); break;
		case 1:
			SendWeaponAnim(KNIFE_ATTACK2HIT); break;
		case 2:
			SendWeaponAnim(KNIFE_ATTACK3HIT); break;
		}

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

#if !CLIENT_DLL

		// hit
		fDidHit = TRUE;
		CBaseEntity *pEntity = CBaseEntity::Instance(tr.pHit);

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

		if (pEntity)
		{
			ClearMultiDamage();
			// If building with the clientside weapon prediction system,
			// UTIL_WeaponTimeBase() is always 0 and m_flNextPrimaryAttack is >= -1.0f, thus making
			// m_flNextPrimaryAttack + 1 < UTIL_WeaponTimeBase() always evaluate to false.
#if CLIENT_WEAPONS
			if( ( m_flNextPrimaryAttack + 1 == UTIL_WeaponTimeBase() ) || g_pGameRules->IsMultiplayer() )
#else
			if( ( m_flNextPrimaryAttack + 1 < UTIL_WeaponTimeBase() ) || g_pGameRules->IsMultiplayer() )
#endif
			{
				// 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);

			if (pEntity->Classify() != CLASS_NONE && pEntity->Classify() != CLASS_MACHINE)
			{
				// play thwack or smack sound
				switch (RANDOM_LONG(0, 1))
				{
				case 0:
					EMIT_SOUND(ENT(m_pPlayer->pev), CHAN_ITEM, "weapons/knife_hit_flesh1.wav", 1, ATTN_NORM); break;
				case 1:
					EMIT_SOUND(ENT(m_pPlayer->pev), CHAN_ITEM, "weapons/knife_hit_flesh2.wav", 1, ATTN_NORM); break;
				}
				m_pPlayer->m_iWeaponVolume = KNIFE_BODYHIT_VOLUME;
				if (!pEntity->IsAlive())
				{
#if CROWBAR_FIX_RAPID_CROWBAR
					m_flNextPrimaryAttack = GetNextAttackDelay(0.25);
#endif
					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:
				EMIT_SOUND_DYN(ENT(m_pPlayer->pev), CHAN_ITEM, "weapons/knife_hit_wall1.wav", fvolbar, ATTN_NORM, 0, 98 + RANDOM_LONG(0, 3));
				break;
			case 1:
				EMIT_SOUND_DYN(ENT(m_pPlayer->pev), CHAN_ITEM, "weapons/knife_hit_wall2.wav", fvolbar, ATTN_NORM, 0, 98 + RANDOM_LONG(0, 3));
				break;
			}

			// delay the decal a bit
			m_trHit = tr;
		}

		m_pPlayer->m_iWeaponVolume = flVol * KNIFE_WALLHIT_VOLUME;

		SetThink(&CKnife::Smack);
		pev->nextthink = UTIL_WeaponTimeBase() + 0.2;
#endif
#if CROWBAR_DELAY_FIX
		m_flNextPrimaryAttack = UTIL_WeaponTimeBase() + 0.25f;
#else
		m_flNextPrimaryAttack = GetNextAttackDelay( 0.25f );
#endif
	}
#if CROWBAR_IDLE_ANIM
	m_flTimeWeaponIdle = UTIL_WeaponTimeBase() + UTIL_SharedRandomFloat( m_pPlayer->random_seed, 10, 15 );
#endif
	return fDidHit;
}

#if CROWBAR_IDLE_ANIM
void CKnife::WeaponIdle( void )
{
	if( m_flTimeWeaponIdle < UTIL_WeaponTimeBase() )
	{
		int iAnim;
		float flRand = UTIL_SharedRandomFloat( m_pPlayer->random_seed, 0, 1 );
		if( flRand > 0.9f )
		{
			iAnim = KNIFE_IDLE2;
			m_flTimeWeaponIdle = UTIL_WeaponTimeBase() + 160.0f / 30.0f;
		}
		else
		{
			if( flRand > 0.5f )
			{
				iAnim = KNIFE_IDLE1;
				m_flTimeWeaponIdle = UTIL_WeaponTimeBase() + 70.0f / 25.0f;
			}
			else
			{
				iAnim = KNIFE_IDLE3;
				m_flTimeWeaponIdle = UTIL_WeaponTimeBase() + 160.0f / 30.0f;
			}
		}
		SendWeaponAnim( iAnim );
	}
}
#endif