/***
*
*	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.
*
****/
/*

===== items.cpp ========================================================

  functions governing the selection/use of weapons for players

*/

#include "extdll.h"
#include "util.h"
#include "cbase.h"
#include "weapons.h"
#include "player.h"
#include "skill.h"
#include "items.h"
#include "gamerules.h"

extern int gmsgItemPickup;

class CWorldItem : public CBaseEntity
{
public:
	void KeyValue( KeyValueData *pkvd ); 
	void Spawn( void );
	int m_iType;
};

LINK_ENTITY_TO_CLASS( world_items, CWorldItem )

void CWorldItem::KeyValue( KeyValueData *pkvd )
{
	if( FStrEq( pkvd->szKeyName, "type" ) )
	{
		m_iType = atoi( pkvd->szValue );
		pkvd->fHandled = TRUE;
	}
	else
		CBaseEntity::KeyValue( pkvd );
}

void CWorldItem::Spawn( void )
{
	CBaseEntity *pEntity = NULL;

	switch( m_iType ) 
	{
	case 44: // ITEM_BATTERY:
		pEntity = CBaseEntity::Create( "item_battery", pev->origin, pev->angles );
		break;
	case 42: // ITEM_ANTIDOTE:
		pEntity = CBaseEntity::Create( "item_antidote", pev->origin, pev->angles );
		break;
	case 43: // ITEM_SECURITY:
		pEntity = CBaseEntity::Create( "item_security", pev->origin, pev->angles );
		break;
	case 45: // ITEM_SUIT:
		pEntity = CBaseEntity::Create( "item_suit", pev->origin, pev->angles );
		break;
	}

	if( !pEntity )
	{
		ALERT( at_console, "unable to create world_item %d\n", m_iType );
	}
	else
	{
		pEntity->pev->target = pev->target;
		pEntity->pev->targetname = pev->targetname;
		pEntity->pev->spawnflags = pev->spawnflags;
	}

	REMOVE_ENTITY( edict() );
}

void CItem::Spawn( void )
{
	pev->movetype = MOVETYPE_TOSS;
	pev->solid = SOLID_TRIGGER;
	pev->velocity = Vector( 0, 0, 0 );
	pev->avelocity = Vector( 0, 0, 0 );
	UTIL_SetOrigin( pev, pev->origin );
	UTIL_SetSize( pev, Vector( -16, -16, 0 ), Vector( 16, 16, 16 ) );
	SetTouch( &CItem::ItemTouch );

	if( DROP_TO_FLOOR(ENT( pev ) ) == 0 )
	{
		ALERT(at_error, "Item %s fell out of level at %f,%f,%f\n", STRING( pev->classname ), pev->origin.x, pev->origin.y, pev->origin.z);
		UTIL_Remove( this );
		return;
	}
	m_SpawnPoint = pev->origin;
	m_SpawnAngles = pev->angles;
}

extern int gEvilImpulse101;

void CItem::ItemTouch( CBaseEntity *pOther )
{
	pev->velocity = ( pev->velocity + pOther->pev->velocity) / 2;
	pev->avelocity = pev->avelocity / 3;
	// if it's not a player, ignore
	if( !pOther->IsPlayer() )
	{
		if( pev->velocity.Length() < 5 )
			pev->velocity = Vector( 0, 0 ,0 );
		SetThink( &CItem::Materialize );
		pev->nextthink = g_pGameRules->FlItemRespawnTime( this );
		if( ( pOther->pev->solid == SOLID_BSP || pOther->entindex() == 0 ) && pev->movetype == MOVETYPE_BOUNCE && pev->velocity.Length() )
		switch( RANDOM_LONG( 0, 2 ) )
		{
			case 0:EMIT_SOUND( ENT( pev ), CHAN_VOICE, "debris/concrete1.wav", 0.15, ATTN_NORM );break;
			case 1:EMIT_SOUND( ENT( pev ), CHAN_VOICE, "debris/concrete2.wav", 0.15, ATTN_NORM );break;
			case 2:EMIT_SOUND( ENT( pev ), CHAN_VOICE, "debris/concrete3.wav", 0.15, ATTN_NORM );break;
		}
		else if( !( pev->flags & FL_ONGROUND ) || !( (pOther->pev->solid == SOLID_BSP) || (pOther->entindex() <= 1) ) )
			pev->movetype = MOVETYPE_TOSS;
		return;
	}

	CBasePlayer *pPlayer = (CBasePlayer *)pOther;

	// ok, a player is touching this item, but can he have it?
	if( !g_pGameRules->CanHaveItem( pPlayer, this ) )
	{
		// no? Ignore the touch.
		return;
	}

	if( MyTouch( pPlayer ) )
	{
		SUB_UseTargets( pOther, USE_TOGGLE, 0 );
		SetTouch( NULL );
		
		// player grabbed the item. 
		g_pGameRules->PlayerGotItem( pPlayer, this );
		if( g_pGameRules->ItemShouldRespawn( this ) == GR_ITEM_RESPAWN_YES )
		{
			Respawn(); 
		}
		else
		{
			UTIL_Remove( this );
		}
	}
	else if( gEvilImpulse101 )
	{
		UTIL_Remove( this );
	}
	else
	{
		pev->movetype = MOVETYPE_TOSS;
		pev->velocity = Vector( 0 ,0 ,0 );
	}
}

CBaseEntity* CItem::Respawn( void )
{
	SetTouch( NULL );
	pev->effects |= EF_NODRAW;

	UTIL_SetOrigin( pev, m_SpawnPoint );// blip to whereever you should respawn.

	SetThink( &CItem::Materialize );
	pev->nextthink = g_pGameRules->FlItemRespawnTime( this ); 
	return this;
}

float CItem::TouchGravGun( CBaseEntity *attacker, int stage)
{
	if( stage == 2 )
		if( (attacker->pev->origin - pev->origin ).Length() < 90 )
			Touch( attacker );
	if( pev->movetype == MOVETYPE_FOLLOW )
		return 0;
	if( pev->movetype == MOVETYPE_NONE )
		return 0;
	if( pev->effects & EF_NODRAW )
		return 0;
	//if( pev->mins == pev->maxs )
		//return 0;
	if( stage == 2 )
	{
		UTIL_MakeVectors( attacker->pev->v_angle + attacker->pev->punchangle);
		float atarget = UTIL_VecToAngles(gpGlobals->v_forward).y;
		pev->angles.y = UTIL_AngleMod(pev->angles.y);
		atarget = UTIL_AngleMod(atarget);
		pev->avelocity.y = UTIL_AngleDiff(atarget, pev->angles.y) * 10;

	}
	if( stage == 3 )
	{
		pev->avelocity.y = pev->avelocity.y*1.5 + RANDOM_FLOAT(100, -100);
	}
	SetThink( &CItem::Materialize );
	pev->nextthink = g_pGameRules->FlItemRespawnTime( this );
	if( ( pev->movetype == MOVETYPE_TOSS ) && ( stage > 1 ) )
	{
		pev->movetype = MOVETYPE_BOUNCE;
		pev->velocity = Vector( 0, 0, 0 );
	}
	return 400;
}

void CItem::Materialize( void )
{
	pev->velocity = Vector( 0, 0, 0 );
	pev->avelocity = Vector( 0, 0, 0 );
	pev->movetype = MOVETYPE_TOSS;
	if( pev->effects & EF_NODRAW )
	{
		// changing from invisible state to visible.
		EMIT_SOUND_DYN( ENT( pev ), CHAN_WEAPON, "items/suitchargeok1.wav", 1, ATTN_NORM, 0, 150 );
		pev->effects &= ~EF_NODRAW;
		pev->effects |= EF_MUZZLEFLASH;
		if( m_SpawnPoint == Vector( 0, 0, 0 ) )
		{
			m_SpawnPoint = pev->origin;
			m_SpawnAngles = pev->angles;
		}
	}
	if( m_SpawnPoint != Vector( 0, 0, 0 ) )
	{
		pev->angles = m_SpawnAngles;
		UTIL_SetOrigin( pev, m_SpawnPoint );// blip to whereever you should respawn.
	}

	SetTouch( &CItem::ItemTouch );
}

#define SF_SUIT_SHORTLOGON		0x0001

class CItemSuit : public CItem
{
	void Spawn( void )
	{ 
		Precache();
		SET_MODEL( ENT( pev ), "models/w_suit.mdl" );
		CItem::Spawn();
	}
	void Precache( void )
	{
		PRECACHE_MODEL( "models/w_suit.mdl" );
	}
	BOOL MyTouch( CBasePlayer *pPlayer )
	{
		if( pPlayer->pev->weapons & ( 1<<WEAPON_SUIT ) )
			return FALSE;

		if( pev->spawnflags & SF_SUIT_SHORTLOGON )
			EMIT_SOUND_SUIT( pPlayer->edict(), "!HEV_A0" );		// short version of suit logon,
		else
			EMIT_SOUND_SUIT( pPlayer->edict(), "!HEV_AAx" );	// long version of suit logon

		pPlayer->pev->weapons |= ( 1 << WEAPON_SUIT );
		return TRUE;
	}
};

LINK_ENTITY_TO_CLASS( item_suit, CItemSuit )

class CItemBattery : public CItem
{
	void Spawn( void )
	{ 
		Precache();
		SET_MODEL( ENT( pev ), "models/w_battery.mdl" );
		CItem::Spawn();
	}
	void Precache( void )
	{
		PRECACHE_MODEL( "models/w_battery.mdl" );
		PRECACHE_SOUND( "items/gunpickup2.wav" );
	}
	BOOL MyTouch( CBasePlayer *pPlayer )
	{
		if( pPlayer->pev->deadflag != DEAD_NO )
		{
			return FALSE;
		}

		if( ( pPlayer->pev->armorvalue < MAX_NORMAL_BATTERY ) &&
			( pPlayer->pev->weapons & ( 1 << WEAPON_SUIT ) ) )
		{
			int pct;
			char szcharge[64];

			pPlayer->pev->armorvalue += gSkillData.batteryCapacity;
			pPlayer->pev->armorvalue = min( pPlayer->pev->armorvalue, MAX_NORMAL_BATTERY );

			EMIT_SOUND( pPlayer->edict(), CHAN_ITEM, "items/gunpickup2.wav", 1, ATTN_NORM );

			MESSAGE_BEGIN( MSG_ONE, gmsgItemPickup, NULL, pPlayer->pev );
				WRITE_STRING( STRING( pev->classname ) );
			MESSAGE_END();

			// Suit reports new power level
			// For some reason this wasn't working in release build -- round it.
			pct = (int)( (float)( pPlayer->pev->armorvalue * 100.0 ) * ( 1.0 / MAX_NORMAL_BATTERY ) + 0.5 );
			pct = ( pct / 5 );
			if( pct > 0 )
				pct--;

			sprintf( szcharge,"!HEV_%1dP", pct );

			//EMIT_SOUND_SUIT( ENT( pev ), szcharge );
			pPlayer->SetSuitUpdate( szcharge, FALSE, SUIT_NEXT_IN_30SEC);
			return TRUE;
		}
		return FALSE;
	}
};

LINK_ENTITY_TO_CLASS( item_battery, CItemBattery )

class CItemAntidote : public CItem
{
	void Spawn( void )
	{ 
		Precache();
		SET_MODEL( ENT( pev ), "models/w_antidote.mdl" );
		CItem::Spawn();
	}
	void Precache( void )
	{
		PRECACHE_MODEL( "models/w_antidote.mdl" );
	}
	BOOL MyTouch( CBasePlayer *pPlayer )
	{
		pPlayer->SetSuitUpdate( "!HEV_DET4", FALSE, SUIT_NEXT_IN_1MIN );

		pPlayer->m_rgItems[ITEM_ANTIDOTE] += 1;
		return TRUE;
	}
};

LINK_ENTITY_TO_CLASS( item_antidote, CItemAntidote )

class CItemSecurity : public CItem
{
	void Spawn( void )
	{ 
		Precache();
		SET_MODEL( ENT( pev ), "models/w_security.mdl" );
		CItem::Spawn();
	}
	void Precache( void )
	{
		PRECACHE_MODEL( "models/w_security.mdl" );
	}
	BOOL MyTouch( CBasePlayer *pPlayer )
	{
		pPlayer->m_rgItems[ITEM_SECURITY] += 1;
		return TRUE;
	}
};

LINK_ENTITY_TO_CLASS( item_security, CItemSecurity )

class CItemLongJump : public CItem
{
	void Spawn( void )
	{ 
		Precache();
		SET_MODEL( ENT( pev ), "models/w_longjump.mdl" );
		CItem::Spawn();
	}
	void Precache( void )
	{
		PRECACHE_MODEL( "models/w_longjump.mdl" );
	}
	BOOL MyTouch( CBasePlayer *pPlayer )
	{
		if( pPlayer->m_fLongJump )
		{
			return FALSE;
		}

		if( ( pPlayer->pev->weapons & ( 1 << WEAPON_SUIT ) ) )
		{
			pPlayer->m_fLongJump = TRUE;// player now has longjump module

			g_engfuncs.pfnSetPhysicsKeyValue( pPlayer->edict(), "slj", "1" );

			MESSAGE_BEGIN( MSG_ONE, gmsgItemPickup, NULL, pPlayer->pev );
				WRITE_STRING( STRING( pev->classname ) );
			MESSAGE_END();

			EMIT_SOUND_SUIT( pPlayer->edict(), "!HEV_A1" );	// Play the longjump sound UNDONE: Kelly? correct sound?
			return TRUE;		
		}
		return FALSE;
	}
};

LINK_ENTITY_TO_CLASS( item_longjump, CItemLongJump )