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

/**** 
* Classes
****/ 
var Coin = Container.expand(function () {
	var self = Container.call(this);
	var coinGraphics = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -4;
	self.collected = false;
	// Animate coin rotation
	tween(coinGraphics, {
		rotation: Math.PI * 2
	}, {
		duration: 2000,
		loop: true,
		easing: tween.easeLinear
	});
	self.update = function () {
		self.x += self.speed;
	};
	return self;
});
var Fish = Container.expand(function () {
	var self = Container.call(this);
	var fishGraphics = self.attachAsset('fish', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocityY = 0;
	self.gravity = 0.8;
	self.swimForce = -12;
	self.swim = function () {
		self.velocityY = self.swimForce;
		LK.getSound('swim').play();
		// Animate swim effect
		tween(fishGraphics, {
			rotation: -0.3
		}, {
			duration: 150,
			easing: tween.easeOut
		});
		tween(fishGraphics, {
			rotation: 0
		}, {
			duration: 300,
			easing: tween.easeIn
		});
	};
	self.update = function () {
		// Apply gravity
		self.velocityY += self.gravity;
		self.y += self.velocityY;
		// Rotate fish based on velocity
		fishGraphics.rotation = Math.max(-0.5, Math.min(0.5, self.velocityY * 0.05));
		// Keep fish within screen bounds - kill if hitting ceiling
		if (self.y < 50) {
			self.y = 50;
			self.velocityY = 0;
			// Fish hit ceiling - trigger game over
			self.hitCeiling = true;
		}
		if (self.y > 2400) {
			self.y = 2400;
			self.velocityY = 0;
		}
	};
	return self;
});
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics = self.attachAsset('shark', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.5,
		scaleY: 1.5
	});
	self.speed = -4;
	self.passed = false;
	self.update = function () {
		self.x += self.speed;
	};
	return self;
});
var SeaDecoration = Container.expand(function (type) {
	var self = Container.call(this);
	var decorationGraphics = self.attachAsset(type, {
		anchorX: 0.5,
		anchorY: 1.0
	});
	self.speed = -1;
	self.update = function () {
		self.x += self.speed;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x006994
});

/**** 
* Game Code
****/ 
// Game variables
var fish;
var obstacles = [];
var decorations = [];
var coins = [];
var spawnTimer = 0;
var decorationTimer = 0;
var coinTimer = 0;
var gameSpeed = 1;
var lastObstacleY = 0;
// Create ocean floor
var oceanFloor = game.addChild(LK.getAsset('oceanFloor', {
	anchorX: 0,
	anchorY: 1.0,
	x: 0,
	y: 2732
}));
// Create fish
fish = game.addChild(new Fish());
fish.x = 300;
fish.y = 1366;
// Create score display
var scoreTxt = new Text2('0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0, 0);
LK.gui.topRight.addChild(scoreTxt);
scoreTxt.x = -150; // Offset from right edge
// Spawn obstacle function
function spawnObstacle() {
	var obstacle = new Obstacle();
	obstacle.x = 2200;
	// Random Y position, but not too close to last obstacle
	var minY = 200;
	var maxY = 2200;
	var targetY;
	do {
		targetY = minY + Math.random() * (maxY - minY);
	} while (Math.abs(targetY - lastObstacleY) < 300);
	obstacle.y = targetY;
	lastObstacleY = targetY;
	obstacles.push(obstacle);
	game.addChild(obstacle);
}
// Spawn decoration function
function spawnDecoration() {
	var decorationType = Math.random() > 0.5 ? 'seaweed' : 'coral';
	var decoration = new SeaDecoration(decorationType);
	decoration.x = 2200;
	decoration.y = 2732 - 150; // Near ocean floor
	decorations.push(decoration);
	game.addChild(decoration);
}
// Spawn coin function
function spawnCoin() {
	var coin = new Coin();
	coin.x = 2200;
	coin.y = 300 + Math.random() * 1800; // Random Y position
	coins.push(coin);
	game.addChild(coin);
}
// Game input handling
game.down = function (x, y, obj) {
	fish.swim();
};
// Main game update loop
game.update = function () {
	// Check if fish hit ceiling
	if (fish.hitCeiling) {
		LK.getSound('collision').play();
		LK.effects.flashScreen(0xFF0000, 1000);
		LK.showGameOver();
		return;
	}
	// Update spawn timers
	spawnTimer++;
	decorationTimer++;
	coinTimer++;
	// Spawn obstacles more frequently
	var spawnRate = Math.max(30, 80 - Math.floor(LK.ticks / 1200)); // More frequent and faster difficulty increase
	if (spawnTimer >= spawnRate) {
		spawnObstacle();
		spawnTimer = 0;
	}
	// Spawn decorations less frequently
	if (decorationTimer >= 180) {
		spawnDecoration();
		decorationTimer = 0;
	}
	// Spawn coins occasionally
	if (coinTimer >= 240) {
		spawnCoin();
		coinTimer = 0;
	}
	// Update obstacles
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var obstacle = obstacles[i];
		// Check if obstacle passed fish (for scoring)
		if (!obstacle.passed && obstacle.x < fish.x) {
			obstacle.passed = true;
			LK.setScore(LK.getScore() + 1);
			scoreTxt.setText(LK.getScore());
		}
		// Remove obstacles that are off screen
		if (obstacle.x < -150) {
			obstacle.destroy();
			obstacles.splice(i, 1);
			continue;
		}
		// Collision detection
		if (fish.intersects(obstacle)) {
			LK.getSound('collision').play();
			LK.effects.flashScreen(0xFF0000, 1000);
			LK.showGameOver();
			return;
		}
	}
	// Update decorations
	for (var j = decorations.length - 1; j >= 0; j--) {
		var decoration = decorations[j];
		// Remove decorations that are off screen
		if (decoration.x < -100) {
			decoration.destroy();
			decorations.splice(j, 1);
		}
	}
	// Update coins
	for (var k = coins.length - 1; k >= 0; k--) {
		var coin = coins[k];
		// Check coin collection
		if (!coin.collected && fish.intersects(coin)) {
			coin.collected = true;
			LK.getSound('coin').play();
			LK.setScore(LK.getScore() + 5); // Coins worth 5 points
			scoreTxt.setText(LK.getScore());
			coin.destroy();
			coins.splice(k, 1);
			continue;
		}
		// Remove coins that are off screen
		if (coin.x < -100) {
			coin.destroy();
			coins.splice(k, 1);
		}
	}
	// Check if fish hit ocean floor
	if (fish.y >= 2600) {
		LK.getSound('collision').play();
		LK.effects.flashScreen(0xFF0000, 1000);
		LK.showGameOver();
	}
	// Increase game speed gradually
	if (LK.ticks % 600 == 0) {
		gameSpeed += 0.1;
	}
};