/* Devan as your follower 1.0, by szmol96 
   http://www.jazz2online.com/snippets/99/devan-as-your-follower/ */

/*Devan as your follower*/
/*Author: szmol96*/

/** System data **/
bool keyJHeld;
bool keyDHeld;
/** Settings **/
const int shootDelay = 16; //The delay between Devan's shoots if you hold the fire key. (Decrease to shoot faster.)
const int runSpeed = 4; //How fast Devan runs. (WARNING: At high speeds he may get stuck in walls.)
const int jumpHeight = -12; //How high Devan jumps. It must be a negative number or he will jump downwards. (WARNING: Too high jumps may result him getting stuck in tiles above him.)
const float gravity = 0.5; //How fast Devan gains vertical speed.
const float maxFallSpeed = 6; //The maximum speed Devan can fall with. (WARNING: At high speeds he may fall through the ground.)
const int followDist = 100;
/*************************************************************************************************/
void followerNpc(jjOBJ@ npc) {
	float dx = p.xPos - npc.xPos;
	float dy = p.yPos - npc.yPos;
	float distX = sqrt(dx*dx); //The horizontal distance between you and Devan.
	float distY = sqrt(dy*dy); //The vertical distance between you and Devan.
	int gunSpotY; //The height he shoots from.
	int shootTimer; //Counts his shoot delay.
	int shootAnimTimer; //This lets his shoot animation play.
	bool onGround; //Does not let him jump in the air.
	bool pickedUp;
	
	jjPLAYER@ p = jjLocalPlayers[0];
	
	npc.yPos = npc.yPos + npc.ySpeed;
	
	if (jjMaskedHLine(npc.xPos - 17, 34, npc.yPos - 11)) npc.ySpeed = 1;
	
	if (!jjMaskedHLine(npc.xPos - 17, 34, npc.yPos + 37)) {
		npc.ySpeed = npc.ySpeed + gravity;  //Fall if nothing is below.
		onGround = false;
	} else {
		npc.ySpeed = 0;
		onGround = true;
	}
	if (npc.ySpeed > maxFallSpeed) npc.ySpeed = maxFallSpeed; //He can't accelerate to infinity.
	
	if (npc.state == STATE::START) {
		npc.state = STATE::IDLE;
		npc.direction = 1;
		shootAnimTimer = 0;
		pickedUp = false;
	}
	if (distX > followDist && npc.state != STATE::DUCK) {
		if (!jjMaskedVLine(npc.xPos + npc.direction * 21, npc.yPos - 10, 34)) {  //check if nothing is in front
			npc.state = STATE::WALK;
			npc.xPos = npc.xPos + npc.direction * runSpeed;
				npc.determineCurAnim(ANIM::DEVILDEVAN, 18);
				npc.frameID = (++npc.counter >> 2) % 13;
		if (jjMaskedVLine(npc.xPos + npc.direction * 16, npc.yPos + 25, 11)) npc.yPos = npc.yPos - 7; //walk up on slopes
		} else if (jjMaskedVLine(npc.xPos + npc.direction * 21, npc.yPos - 10, 34) && onGround) {
			npc.ySpeed = jumpHeight;
		}
		npc.direction = (npc.xPos > p.xPos) ? -1 : 1;
	} else {
		npc.state = STATE::IDLE;
		npc.xSpeed = 0;
		if (shootAnimTimer == 0) {
			npc.determineCurAnim(ANIM::DEVILDEVAN, 21);
			npc.frameID = (++npc.counter >> 3) % 4;
		} else {
			shootAnimTimer--;
			npc.determineCurAnim(ANIM::DEVILDEVAN, 14);
			npc.frameID = (++npc.counter >> 1) % 10;
		}
	} 
	jjOBJ@ bullet;
	if(p.keyFire == true) {
		npc.state = STATE::ATTACK;
		if (shootTimer == 0) {
			@bullet = jjObjects[jjAddObject(OBJECT::BLASTERBULLET, npc.xPos, gunSpotY, npc.objectID, CREATOR::OBJECT)];
			bullet.xSpeed = npc.direction * 10;
			bullet.determineCurAnim(ANIM::DEVILDEVAN, 17);
			shootAnimTimer = 15;
			jjSample(npc.xPos, npc.yPos, SOUND::DEVILDEVAN_PHASER2, 63, 0);
			shootTimer = shootDelay;
		}
		shootTimer--;
	} else {
		shootTimer = 0;
	}
	if (p.keyDown == true) {
		npc.state = STATE::DUCK;
		npc.determineCurAnim(ANIM::DEVILDEVAN, 13);
		npc.frameID = 3;
		gunSpotY = npc.yPos + 20;
	} else {
		gunSpotY = npc.yPos + 5;
	}
		
	if (pickedUp == true) {
		npc.xPos = p.xPos - p.direction * 10;
		npc.yPos = p.yPos - 30;
		npc.direction = -1 * p.direction;
		npc.ySpeed = 0;
		if (p.xSpeed > 5) p.xSpeed = 5;
		if (p.xSpeed < -5) p.xSpeed = -5;
		p.jumpStrength = -8;
	} else {
		p.jumpStrength = -10;
	}
	
	if (distX < 15 && distY < 31 && p.keyDown == true && !keyDHeld) {
		if (pickedUp == false) {
			pickedUp = true;
		} else {
			pickedUp = false;
		}
	}
	
//	if (p.keyJump == true && !keyJHeld && onGround) {
//		npc.ySpeed = jumpHeight;
//	}

	npc.determineCurFrame();
	npc.draw();
	
	keyJHeld = p.keyJump;
	keyDHeld = p.keyDown;
}	

void onLevelLoad() {
	jjObjectPresets[OBJECT::TURTLESHELL].behavior = followerNpc;
	jjObjectPresets[OBJECT::TURTLESHELL].bulletHandling = HANDLING::IGNOREBULLET; //Your bullets just ignore him and go through him.
	jjObjectPresets[OBJECT::TURTLESHELL].playerHandling = HANDLING::PARTICLE; //Don't interact with the player.
	jjAlert("Press down to pick Devan up.");
}