/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");

/**** 
* Classes
****/ 
var Character = Container.expand(function () {
	var self = Container.call(this);
	var characterGraphics = self.attachAsset('character', {
		anchorX: 0.5,
		anchorY: 1.0
	});
	self.isJumping = false;
	self.isDucking = false;
	self.baseY = 0;
	self.jumpSpeed = 0;
	self.gravity = 1.2;
	self.jump = function () {
		if (!self.isJumping) {
			self.isJumping = true;
			self.jumpSpeed = -22;
			LK.getSound('jump').play();
		}
	};
	self.duck = function () {
		if (!self.isDucking && !self.isJumping) {
			self.isDucking = true;
			tween(characterGraphics, {
				scaleY: 0.5
			}, {
				duration: 200
			});
			LK.getSound('duck').play();
		}
	};
	self.stopDuck = function () {
		if (self.isDucking) {
			self.isDucking = false;
			tween(characterGraphics, {
				scaleY: 1.0
			}, {
				duration: 200
			});
		}
	};
	self.update = function () {
		if (self.isJumping) {
			self.jumpSpeed += self.gravity;
			self.y += self.jumpSpeed;
			if (self.y >= self.baseY) {
				self.y = self.baseY;
				self.isJumping = false;
				self.jumpSpeed = 0;
			}
		}
	};
	return self;
});
var Obstacle = Container.expand(function (type) {
	var self = Container.call(this);
	self.type = type;
	self.speed = 8;
	if (type === 'rock') {
		var graphics = self.attachAsset('rock', {
			anchorX: 0.5,
			anchorY: 1.0
		});
	} else if (type === 'branch') {
		var graphics = self.attachAsset('branch', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	} else if (type === 'river') {
		var graphics = self.attachAsset('river', {
			anchorX: 0.5,
			anchorY: 1.0
		});
	}
	self.update = function () {
		self.x -= self.speed;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x2d5a3d
});

/**** 
* Game Code
****/ 
var ground = game.addChild(LK.getAsset('ground', {
	anchorX: 0,
	anchorY: 1.0,
	x: 0,
	y: 2732
}));
var character = game.addChild(new Character());
character.x = 300;
character.y = 2732 - 200;
character.baseY = character.y;
var obstacles = [];
var gameSpeed = 8;
var obstacleSpawnTimer = 0;
var obstacleSpawnDelay = 90;
var distance = 0;
var gameStarted = false;
var scoreTxt = new Text2('Distance: 0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var speedTxt = new Text2('Speed: 1.0x', {
	size: 60,
	fill: 0xFFFF00
});
speedTxt.anchor.set(1.0, 0);
speedTxt.y = 100;
LK.gui.topRight.addChild(speedTxt);
var instructionTxt = new Text2('Tap to Jump, Hold to Duck', {
	size: 70,
	fill: 0xFFFFFF
});
instructionTxt.anchor.set(0.5, 0.5);
instructionTxt.x = 2048 / 2;
instructionTxt.y = 2732 / 2 - 200;
game.addChild(instructionTxt);
var isHoldingDown = false;
function spawnObstacle() {
	var obstacleTypes = ['rock', 'branch', 'river'];
	var randomType = obstacleTypes[Math.floor(Math.random() * obstacleTypes.length)];
	var obstacle = new Obstacle(randomType);
	obstacle.x = 2048 + 100;
	obstacle.speed = gameSpeed;
	if (randomType === 'rock' || randomType === 'river') {
		obstacle.y = 2732 - 200;
	} else if (randomType === 'branch') {
		obstacle.y = 2732 - 300;
	}
	obstacles.push(obstacle);
	game.addChild(obstacle);
}
function checkCollisions() {
	for (var i = 0; i < obstacles.length; i++) {
		var obstacle = obstacles[i];
		if (character.intersects(obstacle)) {
			LK.getSound('crash').play();
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
			return;
		}
	}
}
function updateGame() {
	if (!gameStarted) return;
	distance += gameSpeed / 10;
	LK.setScore(Math.floor(distance));
	scoreTxt.setText('Distance: ' + Math.floor(distance));
	gameSpeed += 0.002;
	var speedMultiplier = (gameSpeed / 8).toFixed(1);
	speedTxt.setText('Speed: ' + speedMultiplier + 'x');
	obstacleSpawnTimer++;
	if (obstacleSpawnTimer >= obstacleSpawnDelay) {
		spawnObstacle();
		obstacleSpawnTimer = 0;
		if (obstacleSpawnDelay > 45) {
			obstacleSpawnDelay -= 0.5;
		}
	}
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var obstacle = obstacles[i];
		obstacle.speed = gameSpeed;
		if (obstacle.x < -150) {
			obstacle.destroy();
			obstacles.splice(i, 1);
		}
	}
	checkCollisions();
}
game.down = function (x, y, obj) {
	if (!gameStarted) {
		gameStarted = true;
		instructionTxt.destroy();
	}
	isHoldingDown = true;
	character.jump();
};
game.up = function (x, y, obj) {
	isHoldingDown = false;
	character.stopDuck();
};
var holdTimer = 0;
game.update = function () {
	if (isHoldingDown) {
		holdTimer++;
		if (holdTimer > 10) {
			character.duck();
		}
	} else {
		holdTimer = 0;
	}
	updateGame();
};