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

/**** 
* Classes
****/ 
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('enemyBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var EnemyPlane = Container.expand(function () {
	var self = Container.call(this);
	var planeGraphics = self.attachAsset('enemyPlane', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	planeGraphics.rotation = Math.PI;
	self.speed = 2;
	self.lastShot = 0;
	self.shotInterval = 120; // 2 seconds at 60fps
	self.health = 1;
	self.update = function () {
		// Move down vertically
		self.y += self.speed;
		// Shooting logic
		self.lastShot++;
		if (self.lastShot >= self.shotInterval) {
			self.shoot();
			self.lastShot = 0;
		}
	};
	self.shoot = function () {
		if (self.parent) {
			var bullet = new EnemyBullet();
			bullet.x = self.x;
			bullet.y = self.y + 40;
			bullet.lastY = bullet.y;
			enemyBullets.push(bullet);
			game.addChild(bullet);
			LK.getSound('enemyShoot').play();
		}
	};
	return self;
});
var PlayerBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('playerBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -12;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var PlayerPlane = Container.expand(function () {
	var self = Container.call(this);
	var planeGraphics = self.attachAsset('playerPlane', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 3;
	self.lastShot = 0;
	self.shotCooldown = 10; // shots per second limit
	self.shoot = function () {
		if (self.lastShot <= 0) {
			var bullet = new PlayerBullet();
			bullet.x = self.x;
			bullet.y = self.y - 50;
			bullet.lastY = bullet.y;
			playerBullets.push(bullet);
			game.addChild(bullet);
			LK.getSound('shoot').play();
			self.lastShot = self.shotCooldown;
		}
	};
	self.dropBomb = function () {
		if (specialBombsAvailable > 0) {
			// Find nearest enemy plane
			var nearestEnemy = null;
			var nearestDistance = Infinity;
			for (var i = 0; i < enemyPlanes.length; i++) {
				var enemy = enemyPlanes[i];
				var dx = self.x - enemy.x;
				var dy = self.y - enemy.y;
				var distance = Math.sqrt(dx * dx + dy * dy);
				if (distance < nearestDistance) {
					nearestDistance = distance;
					nearestEnemy = enemy;
				}
			}
			// If we found an enemy, destroy it directly
			if (nearestEnemy) {
				// Award score for bomb kill
				LK.setScore(LK.getScore() + 20);
				scoreTxt.setText('Score: ' + LK.getScore());
				// Track fighter jets hit
				fighterJetsHit++;
				if (fighterJetsHit >= 5) {
					// Award special bomb every 5 hits
					specialBombsAvailable++;
					bombTxt.setText('Bombs: ' + specialBombsAvailable);
					fighterJetsHit = 0; // Reset counter
				}
				// Destroy enemy with explosion
				LK.effects.flashObject(nearestEnemy, 0xff0000, 300);
				LK.getSound('explosion').play();
				createExplosion(nearestEnemy);
				// Remove from enemy planes array
				for (var j = enemyPlanes.length - 1; j >= 0; j--) {
					if (enemyPlanes[j] === nearestEnemy) {
						enemyPlanes.splice(j, 1);
						break;
					}
				}
				// Create flash effect to show bomb was used
				LK.effects.flashScreen(0xFFFF00, 300);
			}
			specialBombsAvailable--;
			bombTxt.setText('Bombs: ' + specialBombsAvailable);
			LK.getSound('shoot').play();
		}
	};
	self.update = function () {
		if (self.lastShot > 0) {
			self.lastShot--;
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87CEEB
});

/**** 
* Game Code
****/ 
// Game variables
var playerPlane;
var enemyPlanes = [];
var playerBullets = [];
var enemyBullets = [];
var specialBombs = [];
var enemySpawnTimer = 0;
var enemySpawnInterval = 180; // 3 seconds at 60fps
var difficultyTimer = 0;
var speedIncreaseTimer = 0;
var baseEnemySpeed = 2;
var dragNode = null;
var enemySpawnCount = 1; // Number of enemy planes to spawn at once
var enemyIncreaseTimer = 0;
var fighterJetsHit = 0; // Track number of fighter jets hit
var specialBombsAvailable = 0; // Track available special bombs
var lastTapTime = 0; // For double-tap detection
// Explosion effect function
function createExplosion(target) {
	// Create explosion animation using tween
	tween(target, {
		scaleX: 2,
		scaleY: 2,
		alpha: 0,
		rotation: target.rotation + Math.PI
	}, {
		duration: 300,
		easing: tween.easeOut,
		onFinish: function onFinish() {
			target.destroy();
		}
	});
}
// Create score display
var scoreTxt = new Text2('Score: 0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Create life bar display
var lifeTxt = new Text2('Lives: 3', {
	size: 80,
	fill: 0xFF0000
});
lifeTxt.anchor.set(0.5, 0);
lifeTxt.x = 0;
lifeTxt.y = 100;
LK.gui.top.addChild(lifeTxt);
// Create time bar display
var timeTxt = new Text2('Time: 0:00', {
	size: 80,
	fill: 0xFFFF00
});
timeTxt.anchor.set(0.5, 0);
timeTxt.x = 0;
timeTxt.y = 200;
LK.gui.top.addChild(timeTxt);
// Create special bomb display
var bombTxt = new Text2('Bombs: 0', {
	size: 80,
	fill: 0x00FF00
});
bombTxt.anchor.set(0.5, 0);
bombTxt.x = 0;
bombTxt.y = 300;
LK.gui.top.addChild(bombTxt);
// Create player plane
playerPlane = game.addChild(new PlayerPlane());
playerPlane.x = 1024;
playerPlane.y = 2400;
// Game event handlers
function handleMove(x, y, obj) {
	if (dragNode) {
		// Keep player plane within screen bounds
		dragNode.x = Math.max(60, Math.min(1988, x));
		dragNode.y = Math.max(40, Math.min(2692, y));
	}
}
game.move = handleMove;
game.down = function (x, y, obj) {
	// Start dragging player plane
	dragNode = playerPlane;
	handleMove(x, y, obj);
	// Check for double-tap to drop bomb
	var currentTime = LK.ticks;
	if (currentTime - lastTapTime < 30) {
		// 30 ticks = 0.5 seconds
		// Double-tap detected - drop bomb
		playerPlane.dropBomb();
	} else {
		// Single tap - shoot bullet
		playerPlane.shoot();
	}
	lastTapTime = currentTime;
};
game.up = function (x, y, obj) {
	dragNode = null;
};
// Main game update loop
game.update = function () {
	// Update timers
	enemySpawnTimer++;
	difficultyTimer++;
	speedIncreaseTimer++;
	// Update time display
	var gameTimeSeconds = Math.floor(LK.ticks / 60);
	var minutes = Math.floor(gameTimeSeconds / 60);
	var seconds = gameTimeSeconds % 60;
	var timeString = minutes + ':' + (seconds < 10 ? '0' : '') + seconds;
	timeTxt.setText('Time: ' + timeString);
	// Increase difficulty over time
	if (difficultyTimer % 1800 == 0) {
		// Every 30 seconds
		enemySpawnInterval = Math.max(60, enemySpawnInterval - 20);
	}
	// Increase enemy plane speed every 30 seconds
	if (speedIncreaseTimer % 1800 == 0) {
		// Every 30 seconds (1800 ticks at 60fps)
		baseEnemySpeed += 0.5;
		// Update speed for all existing enemy planes
		for (var k = 0; k < enemyPlanes.length; k++) {
			enemyPlanes[k].speed = baseEnemySpeed;
		}
	}
	// Increase enemy spawn count every 45 seconds
	enemyIncreaseTimer++;
	if (enemyIncreaseTimer % 2700 == 0) {
		// Every 45 seconds (2700 ticks at 60fps)
		enemySpawnCount++;
	}
	// Spawn enemy planes
	if (enemySpawnTimer >= enemySpawnInterval) {
		// Spawn multiple enemy planes based on enemySpawnCount
		for (var spawnIndex = 0; spawnIndex < enemySpawnCount; spawnIndex++) {
			var enemy = new EnemyPlane();
			enemy.x = Math.random() * 1800 + 124;
			enemy.y = -100 - spawnIndex * 150; // Offset vertically to avoid overlap
			enemy.speed = baseEnemySpeed;
			enemy.lastY = enemy.y;
			enemy.lastIntersecting = false;
			enemyPlanes.push(enemy);
			game.addChild(enemy);
		}
		enemySpawnTimer = 0;
	}
	// Update player bullets
	for (var i = playerBullets.length - 1; i >= 0; i--) {
		var bullet = playerBullets[i];
		if (bullet.lastY === undefined) bullet.lastY = bullet.y;
		// Remove bullets that go off screen
		if (bullet.lastY >= -50 && bullet.y < -50) {
			bullet.destroy();
			playerBullets.splice(i, 1);
			continue;
		}
		// Check collision with enemy planes
		var hitEnemy = false;
		for (var j = enemyPlanes.length - 1; j >= 0; j--) {
			var enemy = enemyPlanes[j];
			if (bullet.intersects(enemy)) {
				// Hit enemy
				LK.setScore(LK.getScore() + 10);
				scoreTxt.setText('Score: ' + LK.getScore());
				// Track fighter jets hit
				fighterJetsHit++;
				if (fighterJetsHit >= 5) {
					// Award special bomb every 5 hits
					specialBombsAvailable++;
					bombTxt.setText('Bombs: ' + specialBombsAvailable);
					fighterJetsHit = 0; // Reset counter
				}
				// Destroy enemy with explosion
				LK.effects.flashObject(enemy, 0xff0000, 300);
				LK.getSound('explosion').play();
				createExplosion(enemy);
				enemyPlanes.splice(j, 1);
				// Destroy bullet
				bullet.destroy();
				playerBullets.splice(i, 1);
				hitEnemy = true;
				break;
			}
		}
		if (!hitEnemy) {
			bullet.lastY = bullet.y;
		}
	}
	// Update enemy bullets
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		var bullet = enemyBullets[i];
		if (bullet.lastY === undefined) bullet.lastY = bullet.y;
		// Remove bullets that go off screen
		if (bullet.lastY <= 2782 && bullet.y > 2782) {
			bullet.destroy();
			enemyBullets.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (bullet.intersects(playerPlane)) {
			// Player hit - reduce life
			playerPlane.health--;
			lifeTxt.setText('Lives: ' + playerPlane.health);
			// Flash player plane red
			LK.effects.flashObject(playerPlane, 0xff0000, 500);
			LK.getSound('explosion').play();
			// Remove the bullet that hit the player
			bullet.destroy();
			enemyBullets.splice(i, 1);
			// Check if player is dead
			if (playerPlane.health <= 0) {
				createExplosion(playerPlane);
				LK.effects.flashScreen(0xff0000, 1000);
				LK.setTimeout(function () {
					LK.showGameOver();
				}, 300);
				return;
			}
			continue;
		}
		bullet.lastY = bullet.y;
	}
	// Update enemy planes
	for (var i = enemyPlanes.length - 1; i >= 0; i--) {
		var enemy = enemyPlanes[i];
		if (enemy.lastY === undefined) enemy.lastY = enemy.y;
		// Remove enemies that go off screen
		if (enemy.lastY <= 2782 && enemy.y > 2782) {
			enemy.destroy();
			enemyPlanes.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (enemy.intersects(playerPlane)) {
			// Player hit by enemy plane - reduce life
			playerPlane.health--;
			lifeTxt.setText('Lives: ' + playerPlane.health);
			// Flash player plane red
			LK.effects.flashObject(playerPlane, 0xff0000, 500);
			LK.getSound('explosion').play();
			// Remove the enemy that hit the player
			createExplosion(enemy);
			enemyPlanes.splice(i, 1);
			// Check if player is dead
			if (playerPlane.health <= 0) {
				createExplosion(playerPlane);
				LK.effects.flashScreen(0xff0000, 1000);
				LK.setTimeout(function () {
					LK.showGameOver();
				}, 300);
				return;
			}
			continue;
		}
		enemy.lastY = enemy.y;
	}
	// Victory condition - survive for high score
	if (LK.getScore() >= 500) {
		LK.showYouWin();
	}
};
// Start background music
LK.playMusic('bgmusic');