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

/**** 
* Classes
****/ 
// Enemy class
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemySprite = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = enemySprite.width;
	self.height = enemySprite.height;
	self.speed = 6 + Math.random() * 3;
	self.shootTimer = 60 + Math.floor(Math.random() * 60);
	self.hp = 1;
	// Update
	self.update = function () {
		self.y += self.speed;
		self.shootTimer--;
		if (self.shootTimer <= 0) {
			self.shoot();
			self.shootTimer = 90 + Math.floor(Math.random() * 60);
		}
	};
	// Shoot
	self.shoot = function () {
		var bullet = new EnemyBullet();
		bullet.x = self.x;
		bullet.y = self.y + self.height / 2 + bullet.height / 2;
		enemyBullets.push(bullet);
		game.addChild(bullet);
	};
	return self;
});
// Enemy2 class (stronger enemy)
var Enemy2 = Container.expand(function () {
	var self = Container.call(this);
	var enemySprite = self.attachAsset('enemy2', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = enemySprite.width;
	self.height = enemySprite.height;
	self.speed = 7 + Math.random() * 2; // Slightly faster than normal enemy
	self.shootTimer = 60 + Math.floor(Math.random() * 60);
	self.hp = 2; // 2 armor
	// Update
	self.update = function () {
		self.y += self.speed;
		self.shootTimer--;
		if (self.shootTimer <= 0) {
			self.shoot();
			self.shootTimer = 90 + Math.floor(Math.random() * 60);
		}
	};
	// Shoot
	self.shoot = function () {
		var bullet = new EnemyBullet();
		bullet.x = self.x;
		bullet.y = self.y + self.height / 2 + bullet.height / 2;
		enemyBullets.push(bullet);
		game.addChild(bullet);
	};
	return self;
});
// Enemy bullet class
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletSprite = self.attachAsset('enemyBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = bulletSprite.width;
	self.height = bulletSprite.height;
	self.speed = 18;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Hero class
var Hero = Container.expand(function () {
	var self = Container.call(this);
	var heroSprite = self.attachAsset('hero', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = heroSprite.width;
	self.height = heroSprite.height;
	// Attach gun asset to hero's hand, but anchor at the bottom center for upward rotation
	var gunSprite = self.attachAsset('heroGun', {
		anchorX: 0.5,
		anchorY: 1.0 // Anchor at the very bottom of the gun for correct rotation
	});
	// Raise the gun: rotate upwards and move to hero's hand
	gunSprite.x = 0;
	gunSprite.y = -heroSprite.height * 0.45; // Move gun above hero's hand
	gunSprite.rotation = -Math.PI / 2; // Point gun straight up (90 degrees)
	self.gunSprite = gunSprite;
	self.shootCooldown = 0;
	self.poweredUp = false;
	self.powerupTimer = 0;
	self.rapidFire = false;
	self.rapidFireTimer = 0;
	self.tripleShot = false;
	self.tripleShotTimer = 0;
	// Shoot method
	self.shoot = function () {
		if (self.shootCooldown > 0) return;
		if (self.tripleShot) {
			// Triple shot: three bullets, center, left, right
			var offset = 50;
			var bulletCenter = new HeroBullet();
			bulletCenter.x = self.x;
			bulletCenter.y = self.y - self.height / 2 - bulletCenter.height / 2;
			heroBullets.push(bulletCenter);
			game.addChild(bulletCenter);
			var bulletLeft = new HeroBullet();
			bulletLeft.x = self.x - offset;
			bulletLeft.y = self.y - self.height / 2 - bulletLeft.height / 2;
			heroBullets.push(bulletLeft);
			game.addChild(bulletLeft);
			var bulletRight = new HeroBullet();
			bulletRight.x = self.x + offset;
			bulletRight.y = self.y - self.height / 2 - bulletRight.height / 2;
			heroBullets.push(bulletRight);
			game.addChild(bulletRight);
			LK.getSound('shoot').play();
			self.shootCooldown = 6; // Fastest shooting for triple shot
		} else if (self.poweredUp) {
			// Twin shot: two bullets, left and right
			var offset = 40;
			var bulletLeft = new TwinHeroBullet();
			bulletLeft.x = self.x - offset;
			bulletLeft.y = self.y - self.height / 2 - bulletLeft.height / 2;
			bulletLeft.offsetX = -offset;
			heroBullets.push(bulletLeft);
			game.addChild(bulletLeft);
			var bulletRight = new TwinHeroBullet();
			bulletRight.x = self.x + offset;
			bulletRight.y = self.y - self.height / 2 - bulletRight.height / 2;
			bulletRight.offsetX = offset;
			heroBullets.push(bulletRight);
			game.addChild(bulletRight);
			LK.getSound('shoot').play();
			self.shootCooldown = 10; // Faster shooting if powered up
		} else {
			var bullet = new HeroBullet();
			bullet.x = self.x;
			bullet.y = self.y - self.height / 2 - bullet.height / 2;
			heroBullets.push(bullet);
			game.addChild(bullet);
			LK.getSound('shoot').play();
			self.shootCooldown = 20;
		}
	};
	// Powerup method
	self.activatePowerup = function () {
		self.poweredUp = true;
		self.powerupTimer = 300; // 5 seconds at 60fps
		tween(self, {
			scaleX: 1.3,
			scaleY: 1.3
		}, {
			duration: 200,
			easing: tween.elasticOut
		});
	};
	// Remove powerup
	self.deactivatePowerup = function () {
		self.poweredUp = false;
		tween(self, {
			scaleX: 1,
			scaleY: 1
		}, {
			duration: 200,
			easing: tween.elasticIn
		});
	};
	// Update
	self.update = function () {
		if (self.shootCooldown > 0) self.shootCooldown--;
		if (self.rapidFire) {
			self.rapidFireTimer--;
			if (self.rapidFireTimer <= 0) {
				self.rapidFire = false;
				tween(self, {
					scaleX: 1,
					scaleY: 1
				}, {
					duration: 200,
					easing: tween.elasticIn
				});
			}
		}
		if (self.tripleShot) {
			self.tripleShotTimer--;
			if (self.tripleShotTimer <= 0) {
				self.tripleShot = false;
				tween(self, {
					scaleX: 1,
					scaleY: 1
				}, {
					duration: 200,
					easing: tween.elasticIn
				});
			}
		}
		if (self.poweredUp) {
			self.powerupTimer--;
			if (self.powerupTimer <= 0) {
				self.deactivatePowerup();
			}
		}
	};
	return self;
});
// Hero bullet class
var HeroBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletSprite = self.attachAsset('heroBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = bulletSprite.width;
	self.height = bulletSprite.height;
	self.speed = -28;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Powerup class
var Powerup = Container.expand(function () {
	var self = Container.call(this);
	var powerupSprite = self.attachAsset('powerup', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = powerupSprite.width;
	self.height = powerupSprite.height;
	self.speed = 10;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Twin hero bullet class (for 2-bullet powerup)
var TwinHeroBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletSprite = self.attachAsset('heroBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = bulletSprite.width;
	self.height = bulletSprite.height;
	self.speed = -28;
	self.offsetX = 0; // will be set on creation
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x222a36
});

/**** 
* Game Code
****/ 
// Music
// Sound effects
// Powerup: green ellipse
// Hero bullet: yellow box
// Enemy bullet: orange box
// Enemy asset: red ellipse
// Hero asset: blue box
// Play music
LK.playMusic('battlefieldMusic');
// Score
var score = 0;
var scoreTxt = new Text2('0', {
	size: 120,
	fill: "#fff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Hero lives
var heroLives = 5;
var livesTxt = new Text2("♥ x" + heroLives, {
	size: 110,
	fill: 0xFF4444,
	font: "Impact, Arial Black, Tahoma"
});
livesTxt.anchor.set(1, 0);
livesTxt.x = LK.gui.width - 40;
livesTxt.y = 0;
LK.gui.top.addChild(livesTxt);
// Armor display
var armorTxt = new Text2("", {
	size: 90,
	fill: 0x66ccff,
	font: "Impact, Arial Black, Tahoma"
});
armorTxt.anchor.set(1, 0);
armorTxt.x = LK.gui.width - 40;
armorTxt.y = 120;
LK.gui.top.addChild(armorTxt);
// Hero instance
var hero = new Hero();
hero.armor = 5; // Start with 5 armor
game.addChild(hero);
hero.x = 2048 / 2;
hero.y = 2732 - 350;
// Arrays for game objects
var enemies = [];
var heroBullets = [];
var enemyBullets = [];
var powerups = [];
// Dragging
var dragNode = null;
// Difficulty
var spawnTimer = 0;
var spawnInterval = 60;
var difficultyTimer = 0;
// Track enemy spawn multiplier for score-based scaling
var enemySpawnMultiplier = 1;
var lastScoreForSpawnIncrease = 0;
// Powerup spawn
var powerupTimer = 600;
// Move handler
function handleMove(x, y, obj) {
	if (dragNode) {
		// Clamp hero inside game area, avoid top 100px and bottom 100px
		var minX = hero.width / 2;
		var maxX = 2048 - hero.width / 2;
		var minY = 100 + hero.height / 2;
		var maxY = 2732 - hero.height / 2 - 100;
		hero.x = Math.max(minX, Math.min(maxX, x));
		hero.y = Math.max(minY, Math.min(maxY, y));
	}
}
game.move = handleMove;
game.down = function (x, y, obj) {
	// Only start drag if touch is on hero
	var dx = x - hero.x;
	var dy = y - hero.y;
	if (dx * dx + dy * dy < hero.width / 2 * (hero.width / 2)) {
		dragNode = hero;
		handleMove(x, y, obj);
	}
};
game.up = function (x, y, obj) {
	dragNode = null;
};
// Main update loop
game.update = function () {
	// Hero update
	hero.update();
	// Hero auto-shoot
	if (hero.tripleShot) {
		if (LK.ticks % 2 === 0) {
			hero.shoot();
		}
	} else if (hero.rapidFire) {
		if (LK.ticks % 3 === 0) {
			hero.shoot();
		}
	} else if (hero.poweredUp) {
		if (LK.ticks % 6 === 0) {
			hero.shoot();
		}
	} else {
		if (LK.ticks % 12 === 0) {
			hero.shoot();
		}
	}
	// Increase enemy spawn multiplier every 150 points by 3%
	if (score - lastScoreForSpawnIncrease >= 150) {
		var increases = Math.floor((score - lastScoreForSpawnIncrease) / 150);
		for (var inc = 0; inc < increases; inc++) {
			enemySpawnMultiplier *= 1.03;
		}
		lastScoreForSpawnIncrease += 150 * increases;
	}
	// Spawn enemies
	spawnTimer--;
	if (spawnTimer <= 0) {
		var margin = 120;
		var enemiesToSpawn = Math.max(1, Math.floor(enemySpawnMultiplier));
		for (var s = 0; s < enemiesToSpawn; s++) {
			var enemy;
			// Spawn Enemy2 every 20 points (but not at score 0)
			if (score > 0 && score % 20 === 0 && s === 0) {
				enemy = new Enemy2();
			} else {
				enemy = new Enemy();
			}
			enemy.x = margin + Math.random() * (2048 - 2 * margin);
			enemy.y = -enemy.height / 2;
			enemies.push(enemy);
			game.addChild(enemy);
		}
		spawnTimer = spawnInterval;
	}
	// Increase difficulty over time
	difficultyTimer++;
	if (difficultyTimer % 600 === 0 && spawnInterval > 20) {
		spawnInterval -= 5;
	}
	// Powerup spawn
	powerupTimer--;
	if (powerupTimer <= 0) {
		// 20% chance to spawn powerup3 (kill all enemies), 30% for powerup2 (armor), else normal powerup
		var rand = Math.random();
		var powerup;
		if (rand < 0.2) {
			powerup = new Powerup();
			powerup.assetId = 'powerup3';
			// Change sprite to powerup3 asset
			if (powerup.children && powerup.children.length > 0) {
				powerup.removeChild(powerup.children[0]);
			}
			var sprite = powerup.attachAsset('powerup3', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			powerup.width = sprite.width;
			powerup.height = sprite.height;
		} else if (rand < 0.5) {
			powerup = new Powerup();
			powerup.assetId = 'powerup2';
			// Change sprite to powerup2 asset
			if (powerup.children && powerup.children.length > 0) {
				powerup.removeChild(powerup.children[0]);
			}
			var sprite = powerup.attachAsset('powerup2', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			powerup.width = sprite.width;
			powerup.height = sprite.height;
		} else {
			powerup = new Powerup();
			powerup.assetId = 'powerup';
		}
		powerup.x = 200 + Math.random() * (2048 - 400);
		powerup.y = -powerup.height / 2;
		powerups.push(powerup);
		game.addChild(powerup);
		powerupTimer = 810 + Math.floor(Math.random() * 540);
	}
	// Update and cleanup hero bullets
	for (var i = heroBullets.length - 1; i >= 0; i--) {
		var b = heroBullets[i];
		b.update();
		if (b.y < -b.height / 2) {
			b.destroy();
			heroBullets.splice(i, 1);
			continue;
		}
		// Collision with enemies
		for (var j = enemies.length - 1; j >= 0; j--) {
			var e = enemies[j];
			if (b.intersects(e)) {
				e.hp--;
				if (e.hp <= 0) {
					LK.getSound('enemyDown').play();
					score += 10;
					scoreTxt.setText(score);
					// Restore 1 life every 50 points, but only on the exact frame score crosses a multiple of 50
					if (score % 50 === 0 && heroLives < 5) {
						heroLives++;
						livesTxt.setText("♥ x" + heroLives);
						// Optional: flash green to indicate heal
						LK.effects.flashScreen(0x44de83, 400);
					}
					// 30% chance to drop a life if not at max
					if (heroLives < 5 && Math.random() < 0.3) {
						heroLives++;
						livesTxt.setText("♥ x" + heroLives);
						LK.effects.flashScreen(0x44de83, 400);
					}
					// 30% chance to gain armor if killed enemy is Enemy2 (purple)
					if (e instanceof Enemy2 && Math.random() < 0.3) {
						if (typeof hero.armor === "undefined") hero.armor = 0;
						hero.armor++;
						// Optional: flash blue to indicate armor gain
						LK.effects.flashScreen(0x66ccff, 300);
					}
					e.destroy();
					enemies.splice(j, 1);
				}
				b.destroy();
				heroBullets.splice(i, 1);
				break;
			}
		}
	}
	// Update and cleanup enemy bullets
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		var eb = enemyBullets[i];
		eb.update();
		if (eb.y > 2732 + eb.height / 2) {
			eb.destroy();
			enemyBullets.splice(i, 1);
			continue;
		}
		// Collision with hero
		if (eb.intersects(hero)) {
			LK.effects.flashScreen(0xff0000, 800);
			// If hero has armor, consume armor instead of life
			if (typeof hero.armor !== "undefined" && hero.armor > 0) {
				hero.armor--;
				// Optional: flash blue to indicate armor loss
				LK.effects.flashScreen(0x66ccff, 200);
			} else {
				heroLives--;
				livesTxt.setText("♥ x" + heroLives);
				if (heroLives <= 0) {
					LK.showGameOver();
					return;
				}
			}
			eb.destroy();
			enemyBullets.splice(i, 1);
			continue;
		}
	}
	// Update and cleanup enemies
	for (var i = enemies.length - 1; i >= 0; i--) {
		var e = enemies[i];
		e.update();
		if (e.y > 2732 + e.height / 2) {
			e.destroy();
			enemies.splice(i, 1);
			continue;
		}
		// Collision with hero
		if (e.intersects(hero)) {
			LK.effects.flashScreen(0xff0000, 800);
			// If hero has armor, consume armor instead of life
			if (typeof hero.armor !== "undefined" && hero.armor > 0) {
				hero.armor--;
				// Optional: flash blue to indicate armor loss
				LK.effects.flashScreen(0x66ccff, 200);
			} else {
				heroLives--;
				livesTxt.setText("♥ x" + heroLives);
				if (heroLives <= 0) {
					LK.showGameOver();
					return;
				}
			}
			e.destroy();
			enemies.splice(i, 1);
			continue;
		}
	}
	// Update and cleanup powerups
	for (var i = powerups.length - 1; i >= 0; i--) {
		var p = powerups[i];
		p.update();
		if (p.y > 2732 + p.height / 2) {
			p.destroy();
			powerups.splice(i, 1);
			continue;
		}
		// Collision with hero
		if (p.intersects(hero)) {
			LK.getSound('powerup').play();
			// Check if this is a powerup3 (kill all enemies)
			if (p.assetId === 'powerup3') {
				// Kill all enemies instantly
				for (var j = enemies.length - 1; j >= 0; j--) {
					var e = enemies[j];
					LK.getSound('enemyDown').play();
					score += 10;
					scoreTxt.setText(score);
					// Restore 1 life every 50 points, but only on the exact frame score crosses a multiple of 50
					if (score % 50 === 0 && heroLives < 5) {
						heroLives++;
						livesTxt.setText("♥ x" + heroLives);
						LK.effects.flashScreen(0x44de83, 400);
					}
					e.destroy();
					enemies.splice(j, 1);
				}
				// Optional: flash screen to indicate effect
				LK.effects.flashScreen(0x00cfff, 600);
			} else
				// Check if this is a powerup2 (armor powerup)
				if (p.assetId === 'powerup2') {
					// 20% chance to grant triple shot
					if (Math.random() < 0.2) {
						hero.tripleShot = true;
						hero.tripleShotTimer = 300; // 5 seconds at 60fps
						// Remove other powerups if triple shot is granted
						hero.rapidFire = false;
						hero.rapidFireTimer = 0;
						hero.poweredUp = false;
						hero.powerupTimer = 0;
						tween(hero, {
							scaleX: 1.7,
							scaleY: 1.7
						}, {
							duration: 200,
							easing: tween.elasticOut
						});
					} else {
						// Grant 5 armor to hero
						if (typeof hero.armor === "undefined") hero.armor = 0;
						hero.armor += 5;
						// Optional: flash blue to indicate armor gain
						LK.effects.flashScreen(0x66ccff, 400);
					}
				} else {
					// 20% chance to grant rapid fire (faster shooting)
					if (Math.random() < 0.2) {
						hero.rapidFire = true;
						hero.rapidFireTimer = 300; // 5 seconds at 60fps
						hero.poweredUp = false; // Remove twin shot if rapid fire is granted
						tween(hero, {
							scaleX: 1.5,
							scaleY: 1.5
						}, {
							duration: 200,
							easing: tween.elasticOut
						});
					} else {
						hero.activatePowerup();
					}
					// 40% chance to restore 1 life if not at max
					if (heroLives < 5 && Math.random() < 0.4) {
						heroLives++;
						livesTxt.setText("♥ x" + heroLives);
						// Optional: flash green to indicate heal
						LK.effects.flashScreen(0x44de83, 400);
					}
				}
			p.destroy();
			powerups.splice(i, 1);
			continue;
		}
	}
	// Update armor display
	if (typeof hero.armor !== "undefined" && hero.armor > 0) {
		armorTxt.setText("🛡 x" + hero.armor);
		armorTxt.visible = true;
	} else {
		armorTxt.setText("");
		armorTxt.visible = false;
	}
	// Win condition removed: score is now unlimited
};