/**** 
* Classes
****/
var Instructions = Container.expand(function () {
	var self = Container.call(this);
	var instructionsText = new Text2('Instructions: Use your Left Click on mouse to move the hero.\n Right Click to shoot bullets.\n Kill all the monsters to advance to the next level. \n Good Luck!', {
		size: 30,
		fill: '#ffffff',
		align: 'center'
	});
	self.addChild(instructionsText);
	instructionsText.x = 0 - instructionsText.width / 2;
	instructionsText.y = 2 - instructionsText.height / 2;
});
// No assets are defined as this is a blank game
var Hero = Container.expand(function () {
	var self = Container.call(this);
	self.attachAsset('hero', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.targetPosition = {
		x: self.x,
		y: self.y
	};
	self.speed = 5;
	self.direction = {
		x: 0,
		y: 0
	};
	self.update = function () {
		// Calculate the angle in radians and rotate the hero
		var angle = Math.atan2(self.direction.y, self.direction.x);
		self.rotation = angle;
	};
	self.checkCollision = function (trees) {
		return false;
	};
});
var Tree = Container.expand(function () {
	var self = Container.call(this);
	self.attachAsset('tree', {
		anchorX: 0.5,
		anchorY: 0.5
	});
});
var Monster = Container.expand(function () {
	var self = Container.call(this);
	self.attachAsset('monster', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.isAlive = true;
	self.speed = 1;
	self.chaseHero = function (hero) {
		if (!self.isAlive || !hero) {
			return;
		}
		var dx = hero.x - self.x;
		var dy = hero.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 0) {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		}
		if (self.intersects(hero)) {
			if (LK.getScore() < 10) {
				LK.showGameOver({
					text: 'You Suck',
					color: '#FFFFFF'
				});
			} else {
				LK.showGameOver();
			}
		}
	};
	self.destroyedByBullet = function () {
		self.isAlive = false;
		LK.setScore(LK.getScore() + 1);
		scoreTxt.setText('# of Monsters Killed: ' + LK.getScore().toString());
		bulletCount = Math.max(bulletCount + 1, 1);
		bulletCountTxt.setText('Bullets: ' + bulletCount);
		self.destroy();
	};
});
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 2;
	self.direction = {
		x: 0,
		y: 0
	};
	self.move = function (trees) {
		if (self.x < 0 || self.x > 2048 || self.y < 0 || self.y > 2732) {
			self.destroy();
			return true;
		}
		self.x += self.direction.x * self.speed;
		self.y += self.direction.y * self.speed;
		for (var i = 0; i < trees.length; i++) {
			if (self.intersects(trees[i])) {
				self.destroy();
				return true;
			}
		}
		for (var j = 0; j < monsters.length; j++) {
			if (self.intersects(monsters[j]) && monsters[j].isAlive) {
				monsters[j].destroyedByBullet();
				self.destroy();
				return true;
			}
		}
		return false;
	};
});

/**** 
* Initialize Game
****/
var game = new LK.Game({
	backgroundColor: 0x000000 // Initialize game with black background
});

/**** 
* Game Code
****/
var instructions = game.addChild(new Instructions());
instructions.x = 2048 / 2;
instructions.y = 2732 / 3;
var hero = game.addChild(new Hero());
hero.x = 2048 / 2;
hero.y = 2732 / 2;
// Create a text box to display hero's speed and direction
// The heroInfo variable was not defined, so we remove the lines that reference it.
var dragNode = null;
var trees = [];
function handleMove(obj) {
	var event = obj.event;
	var pos = event.getLocalPosition(game);
	if (dragNode) {
		var oldX = dragNode.x;
		var oldY = dragNode.y;
		if (dragNode === hero) {
			var targetX = pos.x;
			var targetY = pos.y;
			var distance = Math.sqrt(Math.pow(targetX - hero.x, 2) + Math.pow(targetY - hero.y, 2));
			hero.direction.x = (targetX - hero.x) / distance;
			hero.direction.y = (targetY - hero.y) / distance;
			var nextX = hero.x + hero.direction.x * hero.speed;
			var nextY = hero.y + hero.direction.y * hero.speed;
			if (!hero.checkCollision(trees)) {
				hero.x = nextX;
				hero.y = nextY;
			} else {
				hero.direction.x = 0;
				hero.direction.y = 0;
			}
		}
	}
}
game.on('move', handleMove);
game.on('down', function (obj) {
	if (instructions) {
		instructions.destroy();
		instructions = null;
	}
	var event = obj.event;
	var pos = event.getLocalPosition(game);
	hero.targetPosition = {
		x: pos.x,
		y: pos.y
	};
	hero.direction.x = hero.targetPosition.x - hero.x;
	hero.direction.y = hero.targetPosition.y - hero.y;
	var distance = Math.sqrt(hero.direction.x * hero.direction.x + hero.direction.y * hero.direction.y);
	hero.direction.x /= distance;
	hero.direction.y /= distance;
});
// Add touch controls for mobile devices
LK.on('touchstart', function (obj) {
	var event = obj.event;
	var pos = event.getLocalPosition(game);
	hero.targetPosition = {
		x: pos.x,
		y: pos.y
	};
	hero.direction.x = hero.targetPosition.x - hero.x;
	hero.direction.y = hero.targetPosition.y - hero.y;
	var distance = Math.sqrt(hero.direction.x * hero.direction.x + hero.direction.y * hero.direction.y);
	hero.direction.x /= distance;
	hero.direction.y /= distance;
});
// Update the text box every game tick
LK.on('tick', function () {
	if (hero.targetPosition) {
		var distanceToTarget = hero.targetPosition ? Math.sqrt(Math.pow(hero.targetPosition.x - hero.x, 2) + Math.pow(hero.targetPosition.y - hero.y, 2)) : 0;
	}
	if (distanceToTarget > hero.speed) {
		var nextX = hero.x + hero.direction.x * hero.speed;
		var nextY = hero.y + hero.direction.y * hero.speed;
		if (!hero.checkCollision(trees)) {
			hero.x = nextX;
			hero.y = nextY;
		}
	} else {
		hero.x = hero.targetPosition.x;
		hero.y = hero.targetPosition.y;
		hero.direction.x = 0;
		hero.direction.y = 0;
	}
	levelResetTxt.setText('Level Number: ' + levelResetCount.toString());
});
game.on('up', function (obj) {
	dragNode = null;
});
var bullets = [];
game.on('rightdown', function (obj) {
	var event = obj.event;
	var pos = event.getLocalPosition(game);
	if (bulletCount > 0) {
		var bullet = game.addChild(new Bullet());
		bullet.x = hero.x;
		bullet.y = hero.y;
		var targetX = pos.x;
		var targetY = pos.y;
		var distance = Math.sqrt(Math.pow(targetX - hero.x, 2) + Math.pow(targetY - hero.y, 2));
		bullet.direction = {
			x: (targetX - hero.x) / distance,
			y: (targetY - hero.y) / distance
		};
		bullet.speed = 10;
		bullets.push(bullet);
		bulletCount--;
		bulletCountTxt.setText('Bullets: ' + bulletCount);
	}
});
LK.on('tick', function () {
	for (var i = bullets.length - 1; i >= 0; i--) {
		if (bullets[i].move(trees)) {
			bullets.splice(i, 1);
		}
	}
	var allMonstersKilled = monsters.every(function (monster) {
		return !monster.isAlive;
	});
	if (allMonstersKilled) {
		resetLevel();
	} else {
		for (var i = 0; i < monsters.length; i++) {
			monsters[i].chaseHero(hero);
		}
	}
});
// Add fewer trees
for (var i = 0; i < 5; i++) {
	var tree = game.addChild(new Tree());
	tree.x = Math.random() * 2048;
	tree.y = Math.random() * 2732;
	trees.push(tree);
}
var monsters = [];
for (var i = 0; i < 5; i++) {
	var monster = game.addChild(new Monster());
	var edge = Math.floor(Math.random() * 4);
	switch (edge) {
		case 0:
			monster.x = Math.random() * 2048;
			monster.y = 0;
			break;
		case 1:
			monster.x = 2048;
			monster.y = Math.random() * 2732;
			break;
		case 2:
			monster.x = Math.random() * 2048;
			monster.y = 2732;
			break;
		case 3:
			monster.x = 0;
			monster.y = Math.random() * 2732;
			break;
	}
	monsters.push(monster);
}
function resetLevel() {
	levelResetCount++;
	// Remove existing trees and monsters
	trees.forEach(function (tree) {
		tree.destroy();
	});
	monsters.forEach(function (monster) {
		monster.destroy();
	});
	trees = [];
	monsters = [];
	// Add trees
	for (var i = 0; i < 5 + levelResetCount; i++) {
		var tree;
		var positionValid;
		do {
			positionValid = true;
			tree = new Tree();
			tree.x = Math.random() * 2048;
			tree.y = Math.random() * 2732;
			// Check if the tree spawns on top of the hero
			if (tree.intersects(hero)) {
				positionValid = false;
			}
		} while (!positionValid);
		game.addChild(tree);
		trees.push(tree);
	}
	// Add monsters
	for (var i = 0; i < 6 + levelResetCount; i++) {
		var monster = game.addChild(new Monster());
		var edge = Math.floor(Math.random() * 4);
		switch (edge) {
			case 0:
				// Top edge
				monster.x = Math.random() * 2048;
				monster.y = 0;
				break;
			case 1:
				// Right edge
				monster.x = 2048;
				monster.y = Math.random() * 2732;
				break;
			case 2:
				// Bottom edge
				monster.x = Math.random() * 2048;
				monster.y = 2732;
				break;
			case 3:
				// Left edge
				monster.x = 0;
				monster.y = Math.random() * 2732;
				break;
		}
		monsters.push(monster);
	}
}
var levelResetCount = 1;
var bulletCount = 10;
var bulletCountTxt = new Text2('Bullets Left: ' + bulletCount, {
	size: 30,
	fill: '#ffffff'
});
LK.gui.bottomRight.addChild(bulletCountTxt);
bulletCountTxt.anchor.set(1, 0);
bulletCountTxt.x = -50;
bulletCountTxt.y = -50;
var bulletNoteTxt = new Text2('Bullets that hit a monster are returned, All others are lost', {
	size: 20,
	fill: '#ffffff'
});
LK.gui.bottomRight.addChild(bulletNoteTxt);
bulletNoteTxt.anchor.set(1, 0);
bulletNoteTxt.x = -50;
bulletNoteTxt.y = -80;
var score = 0;
var scoreTxt = new Text2('# of Monsters Killed: 0', {
	size: 30,
	fill: '#ffffff'
});
LK.gui.topRight.addChild(scoreTxt);
scoreTxt.anchor.set(1, 0);
scoreTxt.x = -50;
scoreTxt.y = 50;
var levelResetTxt = new Text2(levelResetCount.toString(), {
	size: 30,
	fill: '#ffffff'
});
LK.gui.top.addChild(levelResetTxt);
levelResetTxt.anchor.set(1, 0);
levelResetTxt.y = 50;
// Add a button for mobile devices to fire the bullet