// Note: Duke's handling is dumb enough to make it impossible for other actors than the predefined projectile type to be used as projectile - 
// even if it is given the right statnum the projectile code won't get called for it.
// So even in the future any projectile needs to inherit from this to gain the needed feature support.

extend class DukeActor
{
	// placed in DukeActor so it remains reusable.
	void bounce()
	{
		Vector3 vect = (self.angle.ToVector() * self.vel.X, self.vel.Z);
		let sectp = self.sector;

		double daang = sectp.walls[0].delta().Angle();

		double k;
		if (self.pos.Z < (self.floorz + self.ceilingz) * 0.5)
			k = sectp.ceilingheinum;
		else
			k = sectp.floorheinum;

		Vector3 davec = (sin(daang) * k, -cos(daang) * k, 4096);

		double dotp = vect dot davec;
		double l = davec.LengthSquared();

		vect -= davec * (2 * dotp / l);

		self.vel.Z = vect.Z;
		self.vel.X = vect.XY.Length();
		self.angle = vect.Angle();
	}
}

class DukeProjectile : DukeActor
{
	default
	{
		statnum STAT_PROJECTILE;
	}
	
	Vector3 oldpos;		// holds the position before the current move
	meta Sound SpawnSound;

	property SpawnSound: SpawnSound;

	override void Initialize()
	{
		// do not call the parent's function here.
	}
		
	// this large batch of subsequently called virtuals is owed to the spaghetti-like implementation of the orignal moveprojectiles function.
	
	virtual bool premoveeffect()
	{
		return false;
	}
	
	virtual bool postmoveeffect(CollisionData coll)
	{
		if (coll.type != kHitSprite)
		{
			if (self.pos.Z < self.ceilingz)
			{
				coll.setSector(self.sector);
				self.vel.Z -= 1/256.;
			}
			else if ((self.pos.Z > self.floorz && self.sector.lotag != ST_1_ABOVE_WATER) ||
					(self.pos.Z > self.floorz + 16 && self.sector.lotag == ST_1_ABOVE_WATER))
			{
				coll.setSector(self.sector);
				if (self.sector.lotag != ST_1_ABOVE_WATER)
					self.vel.Z += 1/256.;
			}
		}
		return false;
	}
	
	virtual bool weaponhitsprite_pre(DukeActor targ)
	{
		targ.OnHit(self);
		return false;
	}
	
	virtual bool weaponhitplayer(DukeActor targ)
	{
		targ.PlayActorSound("PISTOL_BODYHIT");
		return false;
	}
	
	protected bool weaponhitsprite(DukeActor targ)
	{
		if (self.weaponhitsprite_pre(targ)) return true;
		if (!targ.isPlayer()) return false;
		return self.weaponhitplayer(targ);
	}

	virtual bool weaponhitwall(walltype wal)
	{
		if (self.bMIRRORREFLECT && dlevel.isMirror(wal))
		{
			let k = wal.delta().Angle();
			self.angle = k * 2 - self.angle;
			self.ownerActor = self;
			self.spawn("DukeTransporterStar");
			return true;
		}
		else
		{
			self.SetPosition(oldpos);
			dlevel.checkhitwall(wal, self, self.pos);

			if (self.bREFLECTIVE)
			{
				if (!dlevel.isMirror(wal))
				{
					self.extra >>= 1;
					self.yint--;
				}

				let k = wal.delta().Angle();
				self.angle = k * 2 - self.angle;
				return true;
			}
		}
		return false;
	}

	virtual bool weaponhitsector()
	{
		self.SetPosition(oldpos);

		if (self.vel.Z < 0)
		{
			if ((self.sector.ceilingstat & CSTAT_SECTOR_SKY) && (self.sector.ceilingpal == 0))
			{
				self.Destroy();
				return true;
			}

			dlevel.checkhitceiling(self.sector, self);
		}
		return false;
	}
	
	virtual void posthiteffect(CollisionData coll)
	{
		self.Destroy();
	}
	
	override void Tick()
	{
		double vel = self.vel.X;
		double velz = self.vel.Z;
		oldpos = self.pos;

		int p = -1;

		if (self.bUNDERWATERSLOWDOWN && self.sector.lotag == ST_2_UNDERWATER)
		{
			vel *= 0.5;
			velz *= 0.5;
		}

		self.getglobalz();
		if (self.premoveeffect()) return;

		CollisionData coll;
		self.movesprite_ex((self.angle.ToVector() * vel, velz), CLIPMASK1, coll);

		if (!self.sector)
		{
			self.Destroy();
			return;
		}
		
		if (self.postmoveeffect(coll)) return;

		if (coll.type != 0)
		{
			if (coll.type == kHitSprite)
			{
				if (self.weaponhitsprite(DukeActor(coll.hitactor()))) return;
			}
			else if (coll.type == kHitWall)
			{
				if (weaponhitwall(coll.hitWall())) return;
			}
			else if (coll.type == kHitSector)
			{
				if (weaponhitsector()) return;
			}
			posthiteffect(coll);
		}	
	}
}


//---------------------------------------------------------------------------
//
// 
//
//---------------------------------------------------------------------------

class DukeFirelaser : DukeProjectile // Liztrooper shot
{
	default
	{
		spriteset "FIRELASER", "FIRELASER2", "FIRELASER3", "FIRELASER4", "FIRELASER5", "FIRELASER6";
		Strength FIRELASER_WEAPON_STRENGTH;
		+INFLAME;
		+FULLBRIGHT;
		+MIRRORREFLECT;
	}
	override bool postmoveeffect(CollisionData coll)
	{
		if (Super.postmoveeffect(coll)) return true;
		for (int k = -3; k < 2; k++)
		{
			double zAdd = k * self.vel.Z / 24;
			let spawned = dlevel.SpawnActor(self.sector, self.pos.plusZ(zAdd) + self.angle.ToVector() * k * 2., 'DukeFireLaserTrail', -40 + (k << 2), self.scale, 0, 0., 0., self.ownerActor, STAT_MISC);

			if (spawned)
			{
				spawned.opos = self.opos - self.pos + spawned.pos;
				spawned.cstat = CSTAT_SPRITE_YCENTER;
				spawned.pal = self.pal;
			}
		}
		return false;
	}
	
	override bool ShootThis(DukeActor actor, DukePlayer p, Vector3 pos, double ang) const
	{
		pos.Z -= 2;
		shootprojectile1(actor, p, pos, ang, 52.5, 0);
		return true;
	}
	
	
}

class DukeFirelaserTrail : DukeActor
{
	default
	{
		spriteset "FIRELASER", "FIRELASER2", "FIRELASER3", "FIRELASER4", "FIRELASER5", "FIRELASER6";
		+FULLBRIGHT;
	}
	
	override void Tick()
	{
		if (self.extra == 999)
		{
			self.Destroy();
		}
	}
	
	override bool animate(tspritetype tspr)
	{
		self.extra = 999;
		if (isRR()) tspr.setSpritePic(self, ((PlayClock >> 2) % 6));
		return true;
	}
		
	
}

class RedneckFirelaser : DukeFirelaser
{
	default
	{
		spriteset "FIRELASER", "FIRELASER2", "FIRELASER3", "FIRELASER4", "FIRELASER5", "FIRELASER6";
		Strength FIRELASER_RR_WEAPON_STRENGTH;
	}
	
	override bool animate(tspritetype tspr)
	{
		tspr.setSpritePic(self, ((PlayClock >> 2) % 6));
		return true;
	}
	
	override bool ShootThis(DukeActor actor, DukePlayer p, Vector3 pos, double ang) const
	{
		pos.Z -= 4;
		shootprojectile1(actor, p, pos, ang, 52.5, 0, 0.125);
		return true;
	}
	
}

//---------------------------------------------------------------------------
//
// 
//
//---------------------------------------------------------------------------

class DukeSpit : DukeProjectile
{
	default
	{
		pic "SPIT";
		Strength SPIT_WEAPON_STRENGTH;
	}

	override bool postmoveeffect(CollisionData coll)
	{
		Super.postmoveeffect(coll);
		if (self.vel.Z < 24)
			self.vel.Z += gs.gravity - 112 / 256.;
		return false;
	}
	
	override bool weaponhitplayer(DukeActor targ)
	{
		if (Super.weaponhitplayer(targ)) return true;
		
		let p = targ.GetPlayer();
		
		p.addPitch(-14.04);
		p.centerview();

		if (p.loogcnt == 0)
		{
			if (!p.actor.CheckSoundPlaying("PLAYER_LONGTERM_PAIN"))
				p.actor.PlayActorSound("PLAYER_LONGTERM_PAIN");

			int j = random(3, 7);
			p.numloogs = j;
			p.loogcnt = 24 * 4;
			for (int x = 0; x < j; x++)
			{
				p.loogie[x].X = random(0, 319);
				p.loogie[x].Y = random(0, 199);
			}
		}
		return false;
	}
	
	override bool ShootThis(DukeActor actor, DukePlayer p, Vector3 pos, double ang) const
	{
		pos.Z -= 10;
		shootprojectile1(actor, p, pos, ang, 292/16., 0);
		return true;
	}
}

//---------------------------------------------------------------------------
//
// 
//
//---------------------------------------------------------------------------

class DukeCoolExplosion1 : DukeProjectile // octabrain shot.
{
	default
	{
		spriteset "COOLEXPLOSION1", "COOLEXPLOSION2", "COOLEXPLOSION3", "COOLEXPLOSION4", "COOLEXPLOSION5", 
			"COOLEXPLOSION6", "COOLEXPLOSION7", "COOLEXPLOSION8", "COOLEXPLOSION9", "COOLEXPLOSION10", 
			"COOLEXPLOSION11", "COOLEXPLOSION12", "COOLEXPLOSION13", "COOLEXPLOSION14", "COOLEXPLOSION15", 
			"COOLEXPLOSION16", "COOLEXPLOSION17", "COOLEXPLOSION18", "COOLEXPLOSION19", "COOLEXPLOSION20";
		+FULLBRIGHT;
		+MIRRORREFLECT;
		+SPECIALINIT;
		Strength COOL_EXPLOSION_STRENGTH;
	}
	
	override void Initialize()
	{
		if (!bSIMPLEINIT)
		{
			// looks like this case is never used anywhere.
			self.cstat = CSTAT_SPRITE_YCENTER | self.randomXFlip();
			self.angle = self.ownerActor.angle;
			self.shade = -64;

			double c, f;
			[c, f] = self.sector.getSlopes(self.pos.XY);
			if (self.pos.Z > f - 12)
				self.pos.Z = f - 12;
		}
	}
	
	override bool premoveeffect()
	{
		if (!self.CheckSoundPlaying("WIERDSHOT_FLY"))
			self.PlayActorSound("WIERDSHOT_FLY");
		return false;
	}
	
	override bool weaponhitsprite_pre(DukeActor targ)
	{
		if (!targ.isPlayer())
		{
			return true;
		}
		self.vel.X = self.vel.Z = 0;
		return super.weaponhitsprite_pre(targ);
	}

	override bool weaponhitwall(walltype wal)
	{
		self.vel.X = self.vel.Z = 0;
		return super.weaponhitwall(wal);
	}

	override bool weaponhitsector()
	{
		self.vel.X = self.vel.Z = 0;
		return super.weaponhitsector();
	}

	override void posthiteffect(CollisionData coll)
	{
		// don't destroy.
	}
	
	override void Tick()
	{
		Super.Tick();
		if (++self.shade >= 40)
		{
			self.Destroy();
		}
	}
	
	override bool animate(tspritetype tspr)
	{
		tspr.setSpritePic(self, clamp((self.shade >> 1), 0, 19));
		return true;
	}

	override bool ShootThis(DukeActor actor, DukePlayer p, Vector3 pos, double ang) const
	{
		pos.Z -= 10;
		let spawned = shootprojectile1(actor, p, pos, ang, 292/16., 0);
		if (spawned) 
		{
			spawned.shade = 0;
			// special hack case.
			if (actor.bSPECIALINIT)
			{
				let ovel = spawned.vel.X;
				spawned.vel.X = 64;
				spawned.DoMove(CLIPMASK0);
				spawned.vel.X = ovel;
				spawned.Angle += frandom(-22.5, 22.5);
			}
		}

		return true;
	}

}