//debug testing
var counter = 0;
var randi: Int = 69420;
fn rand() {
	return randi = randi * 1664525 + 1013904223; //can be negative
}

fn wander(actor: Opaque) {
	actor.setX(actor.x + rand() % 5);
	actor.setY(actor.y + rand() % 5);

	counter++;
}

//TODO: general purpose math functions
//TODO: optimize away single-line blocks in the AST

//player controlled character
var playerMaxMotion: Int = 5;
var playerMotionX: Int = 0;
var playerMotionY: Int = 0;

fn playerOnFrame(player: Opaque) {
	//accept input
	if (Keyboard.UP) {
		playerMotionY -= 5;
	}
	if (Keyboard.DOWN) {
		playerMotionY += 5;
	}
	if (Keyboard.LEFT) {
		playerMotionX -= 5;
	}
	if (Keyboard.RIGHT) {
		playerMotionX += 5;
	}

//	print playerMotionX;
//	print playerMotionY;
//	print playerMaxMotion;
//	print -playerMaxMotion;

	//cap the speed
	if (playerMotionX > playerMaxMotion) playerMotionX = playerMaxMotion;
	if (playerMotionX < -playerMaxMotion) playerMotionX = -playerMaxMotion;
	if (playerMotionY > playerMaxMotion) playerMotionY = playerMaxMotion;
	if (playerMotionY < -playerMaxMotion) playerMotionY = -playerMaxMotion;

	//move the player
	player.setX(player.x + playerMotionX);
	player.setY(player.y + playerMotionY);
}

//when the game is ready, load the "zombie" sprite
fn onReady() {
	loadSprite("zombie", "assets/parvati.png", 32, 32);

	//spawn some "zombies" looking for brains
	spawnActorAt("zombie", wander, 250, 250);
	spawnActorAt("zombie", wander, 250, 500);
	spawnActorAt("zombie", wander, 500, 250);
	spawnActorAt("zombie", wander, 500, 500);

	//spawn the player
	loadSprite("player", "assets/parvati.png", 32, 32);
	spawnActorAt("player", playerOnFrame, 300, 300);
}

fn onFrame() {
	//debug
//	print Keyboard.A;
}

//example API for the game
initScreen(1280, 720, "Oh no, Zombies!");
initLoop(onReady, onFrame, null);