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

/**** 
* Classes
****/ 
var Note = Container.expand(function () {
	var self = Container.call(this);
	var noteGraphics = self.attachAsset('note', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.lane = 0;
	self.isHit = false;
	self.targetY = 2300;
	self.update = function () {
		if (!self.isHit) {
			self.y += self.speed;
		}
	};
	self.hit = function () {
		self.isHit = true;
		var hitEffect = game.addChild(LK.getAsset('hitEffect', {
			anchorX: 0.5,
			anchorY: 0.5,
			x: self.x,
			y: self.y,
			alpha: 0.8
		}));
		tween(hitEffect, {
			alpha: 0,
			scaleX: 2,
			scaleY: 2
		}, {
			duration: 300,
			onFinish: function onFinish() {
				hitEffect.destroy();
			}
		});
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1a1a2e
});

/**** 
* Game Code
****/ 
// Game variables
var notes = [];
var lanes = [];
var lanePositions = [400, 650, 900, 1150];
var targetLineY = 2300;
var health = 100;
var combo = 0;
var maxCombo = 0;
var noteSpawnTimer = 0;
var noteSpeed = 8;
var gameSpeed = 1;
// UI elements
var scoreText = new Text2('Score: 0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreText.anchor.set(0, 0);
scoreText.x = 100;
scoreText.y = 100;
game.addChild(scoreText);
var comboText = new Text2('Combo: 0', {
	size: 50,
	fill: 0xF1C40F
});
comboText.anchor.set(0, 0);
comboText.x = 100;
comboText.y = 180;
game.addChild(comboText);
var healthText = new Text2('Health: 100', {
	size: 50,
	fill: 0xE74C3C
});
healthText.anchor.set(1, 0);
healthText.x = 1948;
healthText.y = 100;
game.addChild(healthText);
var accuracyText = new Text2('', {
	size: 80,
	fill: 0x2ECC71
});
accuracyText.anchor.set(0.5, 0.5);
accuracyText.x = 1024;
accuracyText.y = 1366;
game.addChild(accuracyText);
// Create lanes
for (var i = 0; i < 4; i++) {
	var lane = game.addChild(LK.getAsset('lane', {
		anchorX: 0.5,
		anchorY: 0,
		x: lanePositions[i],
		y: 0,
		alpha: 0.3
	}));
	lanes.push(lane);
}
// Create target line
var targetLine = game.addChild(LK.getAsset('targetLine', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 1024,
	y: targetLineY
}));
// Game functions
function spawnNote() {
	var note = new Note();
	var randomLane = Math.floor(Math.random() * 4);
	note.x = lanePositions[randomLane];
	note.y = -50;
	note.lane = randomLane;
	note.speed = noteSpeed * gameSpeed;
	notes.push(note);
	game.addChild(note);
}
function checkNoteHit(x, y) {
	var hitNote = null;
	var bestDistance = Infinity;
	var laneIndex = -1;
	// Determine which lane was tapped
	for (var i = 0; i < lanePositions.length; i++) {
		if (Math.abs(x - lanePositions[i]) < 100) {
			laneIndex = i;
			break;
		}
	}
	if (laneIndex === -1) return;
	// Find the closest note in that lane near the target line
	for (var i = 0; i < notes.length; i++) {
		var note = notes[i];
		if (note.lane === laneIndex && !note.isHit) {
			var distance = Math.abs(note.y - targetLineY);
			if (distance < bestDistance && distance < 150) {
				bestDistance = distance;
				hitNote = note;
			}
		}
	}
	if (hitNote) {
		hitNote.hit();
		var accuracy = '';
		var points = 0;
		if (bestDistance < 30) {
			accuracy = 'PERFECT!';
			points = 100;
			combo++;
		} else if (bestDistance < 80) {
			accuracy = 'GOOD!';
			points = 50;
			combo++;
		} else {
			accuracy = 'OK';
			points = 25;
			combo++;
		}
		LK.setScore(LK.getScore() + points * Math.max(1, Math.floor(combo / 10)));
		if (combo > maxCombo) {
			maxCombo = combo;
		}
		// Show accuracy feedback
		accuracyText.setText(accuracy);
		accuracyText.alpha = 1;
		tween(accuracyText, {
			alpha: 0
		}, {
			duration: 800
		});
		LK.getSound('hitSound').play();
		// Remove hit note
		for (var j = notes.length - 1; j >= 0; j--) {
			if (notes[j] === hitNote) {
				notes.splice(j, 1);
				break;
			}
		}
		LK.setTimeout(function () {
			hitNote.destroy();
		}, 300);
	}
}
function updateUI() {
	scoreText.setText('Score: ' + LK.getScore());
	comboText.setText('Combo: ' + combo);
	healthText.setText('Health: ' + health);
}
// Event handlers
game.down = function (x, y, obj) {
	checkNoteHit(x, y);
};
// Main game loop
game.update = function () {
	// Spawn notes
	noteSpawnTimer++;
	if (noteSpawnTimer >= Math.max(30, 90 - Math.floor(LK.getScore() / 500))) {
		spawnNote();
		noteSpawnTimer = 0;
	}
	// Update game speed based on score
	gameSpeed = 1 + LK.getScore() / 2000;
	noteSpeed = 8 * gameSpeed;
	// Check for missed notes and update notes
	for (var i = notes.length - 1; i >= 0; i--) {
		var note = notes[i];
		// Check if note passed target line (missed)
		if (!note.isHit && note.y > targetLineY + 200) {
			health -= 10;
			combo = 0;
			accuracyText.setText('MISS!');
			accuracyText.alpha = 1;
			tween(accuracyText, {
				alpha: 0
			}, {
				duration: 800
			});
			LK.getSound('missSound').play();
			note.destroy();
			notes.splice(i, 1);
			continue;
		}
		// Remove notes that are off screen
		if (note.y > 2800) {
			note.destroy();
			notes.splice(i, 1);
		}
	}
	// Check game over condition
	if (health <= 0) {
		LK.stopMusic();
		LK.showGameOver();
	}
	// Check win condition (high score achievement)
	if (LK.getScore() >= 10000) {
		LK.stopMusic();
		LK.showYouWin();
	}
	updateUI();
};
// Start background music
LK.playMusic('bgMusic');