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

/**** 
* Classes
****/ 
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 12; // Increased from 8 to 12 for faster enemy movement
	self.lastY = 0;
	self.update = function () {
		self.y += self.speed * gameSpeed;
	};
	return self;
});
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('enemyBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 10;
	self.lastY = 0;
	self.update = function () {
		self.y += self.speed * gameSpeed;
	};
	return self;
});
var EnemyShip = Container.expand(function () {
	var self = Container.call(this);
	var shipGraphics = self.attachAsset('enemyShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.targetLane = 1;
	self.currentLane = 1;
	self.health = 5;
	self.shootTimer = 0;
	self.shootCooldown = 90; // 1.5 seconds at 60fps for faster shooting
	self.dodgeTimer = 0;
	self.lastPlayerLane = 1;
	self.predictiveTimer = 0;
	self.setLane = function (lane) {
		self.targetLane = Math.max(0, Math.min(2, lane));
	};
	self.takeDamage = function () {
		self.health--;
		LK.effects.flashObject(self, 0xff0000, 300);
		if (self.health <= 0) {
			self.destroy();
			return true;
		}
		return false;
	};
	self.update = function () {
		// Move to target lane with improved speed
		var targetX = lanePositions[self.targetLane];
		var diff = targetX - self.x;
		if (Math.abs(diff) > 5) {
			self.x += diff * 0.18; // Faster lane switching
		} else {
			self.x = targetX;
			self.currentLane = self.targetLane;
		}
		// Enhanced AI dodging behavior with prediction
		if (vikingShip && vikingShip.currentLane !== self.lastPlayerLane) {
			self.dodgeTimer = 40; // Faster dodge response
			self.lastPlayerLane = vikingShip.currentLane;
		}
		if (self.dodgeTimer > 0) {
			self.dodgeTimer--;
			// Predictive dodging - try to avoid player's likely path
			var playerLane = vikingShip.currentLane;
			if (playerLane === self.currentLane) {
				// Move to a different lane immediately
				if (self.currentLane === 1) {
					self.setLane(Math.random() < 0.5 ? 0 : 2);
				} else if (self.currentLane === 0) {
					self.setLane(Math.random() < 0.7 ? 2 : 1);
				} else {
					self.setLane(Math.random() < 0.7 ? 0 : 1);
				}
			} else {
				// Dodge away from player with improved logic
				if (playerLane < self.currentLane && self.currentLane < 2) {
					self.setLane(self.currentLane + 1);
				} else if (playerLane > self.currentLane && self.currentLane > 0) {
					self.setLane(self.currentLane - 1);
				}
			}
		}
		// Occasional random movement to be unpredictable
		self.predictiveTimer++;
		if (self.predictiveTimer >= 180) {
			// Every 3 seconds
			self.predictiveTimer = 0;
			if (Math.random() < 0.3) {
				var randomLane = Math.floor(Math.random() * 3);
				self.setLane(randomLane);
			}
		}
		// Shooting behavior - enabled in level 2
		self.shootTimer++;
		if (self.shootTimer >= self.shootCooldown) {
			self.shoot();
			self.shootTimer = 0;
		}
	};
	self.shoot = function () {
		var bullet = new EnemyBullet();
		bullet.x = self.x;
		bullet.y = self.y + 100;
		bullet.lastY = bullet.y;
		enemyBullets.push(bullet);
		game.addChild(bullet);
		LK.getSound('shoot').play();
	};
	return self;
});
var Lightning = Container.expand(function () {
	var self = Container.call(this);
	var lightningGraphics = self.attachAsset('lightning', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 12;
	self.lastY = 0;
	self.update = function () {
		self.y += self.speed * gameSpeed;
	};
	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 = -15;
	self.lastY = 0;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var Rune = Container.expand(function () {
	var self = Container.call(this);
	var runeGraphics = self.attachAsset('rune', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 6;
	self.lastY = 0;
	self.update = function () {
		self.y += self.speed * gameSpeed;
		self.rotation += 0.1;
	};
	return self;
});
var SeaSerpent = Container.expand(function () {
	var self = Container.call(this);
	var serpentGraphics = self.attachAsset('seaSerpent', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 4;
	self.lastY = 0;
	self.update = function () {
		self.y += self.speed * gameSpeed;
		self.x += Math.sin(self.y * 0.01) * 2;
	};
	return self;
});
var Shield = Container.expand(function () {
	var self = Container.call(this);
	var shieldGraphics = self.attachAsset('shield', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 6;
	self.lastY = 0;
	self.update = function () {
		self.y += self.speed * gameSpeed;
		self.rotation += 0.05;
	};
	return self;
});
var VikingShip = Container.expand(function () {
	var self = Container.call(this);
	var shipGraphics = self.attachAsset('vikingShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.targetLane = 1;
	self.currentLane = 1;
	self.health = 3;
	self.shields = 0;
	self.invulnerable = false;
	self.invulnerableTimer = 0;
	self.setLane = function (lane) {
		self.targetLane = Math.max(0, Math.min(2, lane));
	};
	self.takeDamage = function () {
		if (self.invulnerable) return;
		if (self.shields > 0) {
			self.shields--;
			updateShieldDisplay();
		} else {
			self.health--;
			updateHealthDisplay();
			LK.getSound('hit').play();
			if (self.health <= 0) {
				LK.showGameOver();
				return;
			}
		}
		self.invulnerable = true;
		self.invulnerableTimer = 120;
		LK.effects.flashObject(self, 0xff0000, 500);
	};
	self.update = function () {
		var targetX = lanePositions[self.targetLane];
		var diff = targetX - self.x;
		if (Math.abs(diff) > 5) {
			self.x += diff * 0.25;
		} else {
			self.x = targetX;
			self.currentLane = self.targetLane;
		}
		if (self.invulnerable) {
			self.invulnerableTimer--;
			if (self.invulnerableTimer <= 0) {
				self.invulnerable = false;
			}
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1e3a8a
});

/**** 
* Game Code
****/ 
var lanePositions = [2048 * 0.25, 2048 * 0.5, 2048 * 0.75];
var vikingShip = null;
var enemies = [];
var runes = [];
var shields = [];
var lightnings = [];
var seaSerpents = [];
var enemyShip = null;
var enemyBullets = [];
var playerBullets = [];
var level = 1;
var score = 0;
var distance = 0;
var enemySpawnTimer = 0;
var runeSpawnTimer = 0;
var shieldSpawnTimer = 0;
var lightningSpawnTimer = 0;
var serpentSpawnTimer = 0;
var gameSpeed = 1;
var levelTimer = 0;
var levelDuration = 7200; // 2 minutes at 60fps
var scoreTxt = new Text2('Score: 0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0, 0);
scoreTxt.x = 150;
scoreTxt.y = 50;
LK.gui.topLeft.addChild(scoreTxt);
var levelTxt = new Text2('Level: 1', {
	size: 60,
	fill: 0xFFFFFF
});
levelTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(levelTxt);
var healthTxt = new Text2('Health: 3', {
	size: 60,
	fill: 0xFF0000
});
healthTxt.anchor.set(1, 0);
healthTxt.x = -50;
healthTxt.y = 50;
LK.gui.topRight.addChild(healthTxt);
var shieldTxt = new Text2('Shields: 0', {
	size: 60,
	fill: 0x4169E1
});
shieldTxt.anchor.set(1, 0);
shieldTxt.x = -50;
shieldTxt.y = 120;
LK.gui.topRight.addChild(shieldTxt);
// Variables for swipe detection
var touchStartX = 0;
var touchStartY = 0;
var swipeMinDistance = 50;
function updateScore() {
	scoreTxt.setText('Score: ' + score);
}
function updateLevel() {
	levelTxt.setText('Level: ' + level);
}
function updateHealthDisplay() {
	healthTxt.setText('Health: ' + vikingShip.health);
}
function updateShieldDisplay() {
	shieldTxt.setText('Shields: ' + vikingShip.shields);
}
function spawnEnemy() {
	var enemy = new Enemy();
	var lane = Math.floor(Math.random() * 3);
	enemy.x = lanePositions[lane];
	enemy.y = -100;
	enemy.lastY = enemy.y;
	enemies.push(enemy);
	game.addChild(enemy);
}
function spawnRune() {
	var rune = new Rune();
	var lane = Math.floor(Math.random() * 3);
	rune.x = lanePositions[lane];
	rune.y = -100;
	rune.lastY = rune.y;
	runes.push(rune);
	game.addChild(rune);
}
function spawnShield() {
	var shield = new Shield();
	var lane = Math.floor(Math.random() * 3);
	shield.x = lanePositions[lane];
	shield.y = -100;
	shield.lastY = shield.y;
	shields.push(shield);
	game.addChild(shield);
}
function spawnLightning() {
	var lightning = new Lightning();
	var lane = Math.floor(Math.random() * 3);
	lightning.x = lanePositions[lane];
	lightning.y = -100;
	lightning.lastY = lightning.y;
	lightnings.push(lightning);
	game.addChild(lightning);
}
function spawnSeaSerpent() {
	var serpent = new SeaSerpent();
	var lane = Math.floor(Math.random() * 3);
	serpent.x = lanePositions[lane];
	serpent.y = -200;
	serpent.lastY = serpent.y;
	seaSerpents.push(serpent);
	game.addChild(serpent);
}
function checkCollisions() {
	for (var i = enemies.length - 1; i >= 0; i--) {
		var enemy = enemies[i];
		if (enemy.intersects(vikingShip)) {
			vikingShip.takeDamage();
			enemy.destroy();
			enemies.splice(i, 1);
		}
	}
	for (var i = runes.length - 1; i >= 0; i--) {
		var rune = runes[i];
		if (rune.intersects(vikingShip)) {
			score += 100;
			updateScore();
			LK.getSound('collect').play();
			rune.destroy();
			runes.splice(i, 1);
		}
	}
	for (var i = shields.length - 1; i >= 0; i--) {
		var shield = shields[i];
		if (shield.intersects(vikingShip)) {
			vikingShip.shields++;
			updateShieldDisplay();
			LK.getSound('collect').play();
			shield.destroy();
			shields.splice(i, 1);
		}
	}
	for (var i = lightnings.length - 1; i >= 0; i--) {
		var lightning = lightnings[i];
		if (lightning.intersects(vikingShip)) {
			vikingShip.takeDamage();
			lightning.destroy();
			lightnings.splice(i, 1);
		}
	}
	for (var i = seaSerpents.length - 1; i >= 0; i--) {
		var serpent = seaSerpents[i];
		if (serpent.intersects(vikingShip)) {
			vikingShip.takeDamage();
			serpent.destroy();
			seaSerpents.splice(i, 1);
		}
	}
	// Check enemy bullet collisions
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		var bullet = enemyBullets[i];
		if (bullet.intersects(vikingShip)) {
			vikingShip.takeDamage();
			bullet.destroy();
			enemyBullets.splice(i, 1);
		}
	}
	// Check player bullet collisions with enemy ship
	if (enemyShip) {
		for (var i = playerBullets.length - 1; i >= 0; i--) {
			var bullet = playerBullets[i];
			if (bullet.intersects(enemyShip)) {
				if (enemyShip.takeDamage()) {
					enemyShip = null;
					score += 1000;
					updateScore();
					// Victory condition - enemy ship defeated
					LK.showYouWin();
				}
				bullet.destroy();
				playerBullets.splice(i, 1);
			}
		}
	}
}
function cleanupObjects() {
	for (var i = enemies.length - 1; i >= 0; i--) {
		var enemy = enemies[i];
		if (enemy.lastY < 2800 && enemy.y >= 2800) {
			enemy.destroy();
			enemies.splice(i, 1);
		}
		enemy.lastY = enemy.y;
	}
	for (var i = runes.length - 1; i >= 0; i--) {
		var rune = runes[i];
		if (rune.lastY < 2800 && rune.y >= 2800) {
			rune.destroy();
			runes.splice(i, 1);
		}
		rune.lastY = rune.y;
	}
	for (var i = shields.length - 1; i >= 0; i--) {
		var shield = shields[i];
		if (shield.lastY < 2800 && shield.y >= 2800) {
			shield.destroy();
			shields.splice(i, 1);
		}
		shield.lastY = shield.y;
	}
	for (var i = lightnings.length - 1; i >= 0; i--) {
		var lightning = lightnings[i];
		if (lightning.lastY < 2800 && lightning.y >= 2800) {
			lightning.destroy();
			lightnings.splice(i, 1);
		}
		lightning.lastY = lightning.y;
	}
	for (var i = seaSerpents.length - 1; i >= 0; i--) {
		var serpent = seaSerpents[i];
		if (serpent.lastY < 2800 && serpent.y >= 2800) {
			serpent.destroy();
			seaSerpents.splice(i, 1);
		}
		serpent.lastY = serpent.y;
	}
	// Cleanup enemy bullets
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		var bullet = enemyBullets[i];
		if (bullet.lastY < 2800 && bullet.y >= 2800) {
			bullet.destroy();
			enemyBullets.splice(i, 1);
		}
		bullet.lastY = bullet.y;
	}
	// Cleanup player bullets
	for (var i = playerBullets.length - 1; i >= 0; i--) {
		var bullet = playerBullets[i];
		if (bullet.lastY > -100 && bullet.y <= -100) {
			bullet.destroy();
			playerBullets.splice(i, 1);
		}
		bullet.lastY = bullet.y;
	}
}
vikingShip = new VikingShip();
vikingShip.x = lanePositions[1];
vikingShip.y = 2200;
game.addChild(vikingShip);
game.down = function (x, y, obj) {
	touchStartX = x;
	touchStartY = y;
};
game.up = function (x, y, obj) {
	var deltaX = x - touchStartX;
	var deltaY = y - touchStartY;
	var swipeDistance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
	// Check if it's a swipe (minimum distance moved)
	if (swipeDistance >= swipeMinDistance) {
		// Horizontal swipe for lane changes
		if (Math.abs(deltaX) > Math.abs(deltaY)) {
			if (deltaX > 0) {
				// Swipe right - move to next lane
				vikingShip.setLane(vikingShip.currentLane + 1);
			} else {
				// Swipe left - move to previous lane
				vikingShip.setLane(vikingShip.currentLane - 1);
			}
		}
	} else {
		// It's a tap - shoot in level 2
		if (level === 2) {
			var bullet = new PlayerBullet();
			bullet.x = vikingShip.x;
			bullet.y = vikingShip.y - 100;
			bullet.lastY = bullet.y;
			playerBullets.push(bullet);
			game.addChild(bullet);
			LK.getSound('shoot').play();
		}
	}
};
game.update = function () {
	distance++;
	score += 1;
	levelTimer++;
	// Progressive speed increase in level 1
	if (level === 1) {
		var timeProgress = levelTimer / levelDuration;
		gameSpeed = 1 + timeProgress * 2.0; // Speed increases from 1 to 3.0 over 2 minutes for higher difficulty
	}
	// Check for level progression based on time
	if (levelTimer >= levelDuration) {
		level++;
		levelTimer = 0;
		gameSpeed += 0.2;
		updateLevel();
		// Spawn enemy ship in level 2
		if (level === 2 && !enemyShip) {
			enemyShip = new EnemyShip();
			enemyShip.x = lanePositions[1];
			enemyShip.y = 300;
			game.addChild(enemyShip);
		}
	}
	// Ensure enemy ship exists in level 2 (in case it was destroyed or not spawned)
	if (level === 2 && !enemyShip) {
		enemyShip = new EnemyShip();
		enemyShip.x = lanePositions[1];
		enemyShip.y = 300;
		game.addChild(enemyShip);
	}
	// Dynamic obstacle spawn timing based on level and time progression - only in level 1
	if (level === 1) {
		var baseEnemySpawnRate = 60; // Reduced from 90 to 60 for more frequent spawns
		var timeProgress = levelTimer / levelDuration;
		var difficultyMultiplier = 1 + timeProgress * 2.0; // Increased from 1.5 to 2.0 for faster difficulty ramp
		var enemySpawnRate = Math.max(baseEnemySpawnRate / difficultyMultiplier, 8); // Reduced minimum from 15 to 8
		enemySpawnTimer++;
		if (enemySpawnTimer >= enemySpawnRate) {
			spawnEnemy();
			enemySpawnTimer = 0;
		}
	}
	// Adaptive rune spawn rate - made more scarce in level 1
	var runeSpawnRate = level === 2 ? 80 : Math.max(300 - level * 20, 180); // Increased from 200/120 to 300/180
	runeSpawnTimer++;
	if (runeSpawnTimer >= runeSpawnRate) {
		spawnRune();
		runeSpawnTimer = 0;
	}
	shieldSpawnTimer++;
	var shieldSpawnRate = level === 2 ? 300 : 600;
	if (shieldSpawnTimer >= shieldSpawnRate) {
		spawnShield();
		shieldSpawnTimer = 0;
	}
	// Add sea serpent spawning in level 1 for extra difficulty
	if (level === 1) {
		var serpentSpawnRate = 400; // Spawn sea serpents occasionally in level 1
		serpentSpawnTimer++;
		if (serpentSpawnTimer >= serpentSpawnRate) {
			spawnSeaSerpent();
			serpentSpawnTimer = 0;
		}
	}
	if (level === 2) {
		var lightningSpawnRate = 80;
		lightningSpawnTimer++;
		if (lightningSpawnTimer >= lightningSpawnRate) {
			spawnLightning();
			lightningSpawnTimer = 0;
		}
	}
	checkCollisions();
	cleanupObjects();
	if (LK.ticks % 10 === 0) {
		updateScore();
	}
};
LK.playMusic('vikingTheme');