//========= Copyright © 1996-2005, Valve Corporation, All rights reserved. ============//
//
// Purpose: 
//
// $NoKeywords: $
//
//=============================================================================//
//
// Purpose: 
//
//=============================================================================

#ifndef VEHICLE_CRANE_H
#define VEHICLE_CRANE_H
#ifdef _WIN32
#pragma once
#endif

#include "physobj.h"
#include "rope.h"
#include "rope_shared.h"
#include "physics_bone_follower.h"

#define CRANE_EXTENSION_RATE_MAX	0.01
#define CRANE_TURN_RATE_MAX			1.2
#define MAXIMUM_CRANE_PICKUP_MASS	10000
#define MINIMUM_CRANE_PICKUP_MASS	500

#define MAX_CRANE_FLAT_REACH		1400.0
#define MIN_CRANE_FLAT_REACH		700.0
#define CRANE_EXTENSION_ACCEL		0.006
#define CRANE_EXTENSION_DECEL		0.02
#define CRANE_TURN_ACCEL			0.2
#define CRANE_DECEL					0.5

#define CRANE_SLOWRAISE_TIME		5.0

// Turning stats
enum
{
	TURNING_NOT,
	TURNING_LEFT,
	TURNING_RIGHT,
};

class CPropCrane;

//-----------------------------------------------------------------------------
// Purpose: This is the entity we attach to the tip of the crane and dangle the cable from
//-----------------------------------------------------------------------------
class CCraneTip : public CBaseAnimating
{
	DECLARE_CLASS( CCraneTip, CBaseAnimating );
public:
	DECLARE_DATADESC();

	~CCraneTip( void )
	{
		if ( m_pSpring )
		{
			physenv->DestroySpring( m_pSpring );
		}
	}

	void	Spawn( void );
	void	Precache( void );

	bool				CreateConstraint( CBaseAnimating *pMagnet, IPhysicsConstraintGroup *pGroup );
	static CCraneTip	*Create( CBaseAnimating *pCraneMagnet, IPhysicsConstraintGroup *pGroup, const Vector &vecOrigin, const QAngle &vecAngles );

public:
	IPhysicsSpring			*m_pSpring;
};

//-----------------------------------------------------------------------------
// Purpose: Crane vehicle server
//-----------------------------------------------------------------------------
class CCraneServerVehicle : public CBaseServerVehicle
{
	typedef CBaseServerVehicle BaseClass;
// IServerVehicle
public:
	void	GetVehicleViewPosition( int nRole, Vector *pAbsOrigin, QAngle *pAbsAngles );

	// NPC Driving
	void	NPC_SetDriver( CNPC_VehicleDriver *pDriver );
	void	NPC_DriveVehicle( void );

protected:
	CPropCrane *GetCrane( void );
};

//-----------------------------------------------------------------------------
// Purpose: 
//-----------------------------------------------------------------------------
class CPropCrane : public CBaseProp, public IDrivableVehicle
{
	DECLARE_CLASS( CPropCrane, CBaseProp );
public:
	DECLARE_DATADESC();
	DECLARE_SERVERCLASS();

	CPropCrane( void )
	{
		m_ServerVehicle.SetVehicle( this );
	}

	~CPropCrane( void )
	{
		physenv->DestroyConstraintGroup( m_pConstraintGroup );
	}

	// CBaseEntity
	virtual void	Precache( void );
	void			Spawn( void );
	void			Activate( void );
	void			UpdateOnRemove( void );
	void			OnRestore( void );
	bool			CreateVPhysics( void );
	void			InitCraneSpeeds( void );
	void			Think(void);
	virtual int		ObjectCaps( void ) { return BaseClass::ObjectCaps() | FCAP_IMPULSE_USE; };
	virtual void	Use( CBaseEntity *pActivator, CBaseEntity *pCaller, USE_TYPE useType, float value );
	virtual void	DrawDebugGeometryOverlays( void );

	virtual Vector	BodyTarget( const Vector &posSrc, bool bNoisy = true );
	virtual void	TraceAttack( const CTakeDamageInfo &info, const Vector &vecDir, trace_t *ptr );
	virtual int		OnTakeDamage( const CTakeDamageInfo &info );

	void			PlayerControlInit( CBasePlayer *pPlayer );
	void			PlayerControlShutdown( void );
	void			ResetUseKey( CBasePlayer *pPlayer );

	void			DriveCrane( int iDriverButtons, int iButtonsPressed, float flNPCSteering = 0.0 );
	void			RunCraneMovement( float flTime );

	void			TurnMagnetOn( void );
	void			TurnMagnetOff( void );
	const Vector	&GetCraneTipPosition( void );
	float			GetExtensionRate( void ) { return m_flExtensionRate; }
	float			GetTurnRate( void ) { return m_flTurn; }
	float			GetMaxTurnRate( void ) { return m_flMaxTurnSpeed; }
	CPhysMagnet		*GetMagnet( void ) { return m_hCraneMagnet; }
	float			GetTotalMassOnCrane( void ) { return m_hCraneMagnet->GetTotalMassAttachedObjects(); }
	bool			IsDropping( void ) { return m_bDropping; }

	// Inputs
	void			InputLock( inputdata_t &inputdata );
	void			InputUnlock( inputdata_t &inputdata );
	void			InputForcePlayerIn( inputdata_t &inputdata );

	// Crane handling
	void			GetCraneTipPosition( Vector *vecOrigin, QAngle *vecAngles );
	void			RecalculateCraneTip( void );
	void			GetVectors(Vector* pForward, Vector* pRight, Vector* pUp) const;

	void			SetNPCDriver( CNPC_VehicleDriver *pDriver );

// IDrivableVehicle
public:
	virtual CBaseEntity *GetDriver( void );
	virtual void		ItemPostFrame( CBasePlayer *pPlayer );
	virtual void		SetupMove( CBasePlayer *player, CUserCmd *ucmd, IMoveHelper *pHelper, CMoveData *move );
	virtual void		ProcessMovement( CBasePlayer *pPlayer, CMoveData *pMoveData ) { return; }
	virtual void		FinishMove( CBasePlayer *player, CUserCmd *ucmd, CMoveData *move ) { return; }
	virtual bool		CanEnterVehicle( CBaseEntity *pEntity );
	virtual bool		CanExitVehicle( CBaseEntity *pEntity );
	virtual void		SetVehicleEntryAnim( bool bOn ) { m_bEnterAnimOn = bOn; }
	virtual void		SetVehicleExitAnim( bool bOn, Vector vecEyeExitEndpoint ) { m_bExitAnimOn = bOn; if ( bOn ) m_vecEyeExitEndpoint = vecEyeExitEndpoint; }
	virtual void		EnterVehicle( CBasePlayer *pPlayer );

	virtual bool		AllowBlockedExit( CBasePlayer *pPlayer, int iRole ) { return true; }
	virtual bool		AllowMidairExit( CBasePlayer *pPlayer, int nRole ) { return false; }
	virtual void		PreExitVehicle( CBasePlayer *pPlayer, int iRole ) {}
	virtual void		ExitVehicle( int iRole );

	// If this is a vehicle, returns the vehicle interface
	virtual IServerVehicle *GetServerVehicle() { return &m_ServerVehicle; }

protected:
	// Contained IServerVehicle
	CCraneServerVehicle		m_ServerVehicle;
	// Contained Bone Follower manager
	CBoneFollowerManager	m_BoneFollowerManager;

private:

	CNetworkHandle( CBasePlayer, m_hPlayer );
	CNetworkVar( bool, m_bMagnetOn ); 

	// NPC Driving
	CHandle<CNPC_VehicleDriver>		m_hNPCDriver;
	int								m_nNPCButtons;

	// Entering / Exiting
	bool				m_bLocked;
	CNetworkVar( bool,	m_bEnterAnimOn );
	CNetworkVar( bool,	m_bExitAnimOn );
	CNetworkVector(		m_vecEyeExitEndpoint );
	COutputEvent		m_playerOn;
	COutputEvent		m_playerOff;

	// Turning
	int				m_iTurning;
	bool			m_bStartSoundAtCrossover;
	float			m_flTurn;

	// Crane arm extension / retraction
	bool			m_bExtending;
	float			m_flExtension;
	float			m_flExtensionRate;

	// Magnet movement	
	bool			m_bDropping;
	float			m_flNextDangerSoundTime;
	float			m_flNextCreakSound;
	float			m_flNextDropAllowedTime;
	float			m_flSlowRaiseTime;

	// Speeds
	float			m_flMaxExtensionSpeed;
	float			m_flMaxTurnSpeed;
	float			m_flExtensionAccel;
	float			m_flExtensionDecel;
	float			m_flTurnAccel;
	float			m_flTurnDecel;

	// Cable Tip & Magnet
	string_t				m_iszMagnetName;
	CHandle<CPhysMagnet>	m_hCraneMagnet;
	CHandle<CCraneTip>		m_hCraneTip;
	CHandle<CRopeKeyframe>	m_hRope;
	IPhysicsConstraintGroup *m_pConstraintGroup;

	// Vehicle script filename
	string_t		m_vehicleScript;
};

#endif // VEHICLE_CRANE_H
