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

/**** 
* Classes
****/ 
// Bird class
var Bird = Container.expand(function () {
	var self = Container.call(this);
	// Bird types
	var birdTypes = [{
		id: 'birdFalcon',
		name: 'Falcon'
	}, {
		id: 'birdEagle',
		name: 'Eagle'
	}, {
		id: 'birdChough',
		name: 'Chough'
	}, {
		id: 'birdRobin',
		name: 'Robin'
	}, {
		id: 'birdStork',
		name: 'Stork'
	}, {
		id: 'birdDuck',
		name: 'Duck'
	}, {
		id: 'birdMacaw',
		name: 'Macaw'
	}, {
		id: 'birdSeagull',
		name: 'Seagull'
	}, {
		id: 'birdHummingbird',
		name: 'Hummingbird'
	}, {
		id: 'birdSwan',
		name: 'Swan'
	}];
	// Pick a random type
	var typeIndex = Math.floor(Math.random() * birdTypes.length);
	var type = birdTypes[typeIndex];
	self.birdType = type.name;
	// Main body
	var body = self.attachAsset(type.id, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Beak (right side)
	self.attachAsset('birdBeak', {
		anchorX: 0.1,
		anchorY: 0.5,
		x: body.width / 2 + 8,
		y: 0,
		rotation: 0.1
	});
	// Eye
	self.attachAsset('birdEye', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: body.width / 4,
		y: -body.height / 6
	});
	// For movement
	self.speed = 6 + Math.random() * 4; // px per frame
	self.dir = Math.random() < 0.5 ? 1 : -1; // left or right
	self.vy = -2 + Math.random() * 4; // up or down
	self.osc = Math.random() * Math.PI * 2; // for wavy movement
	// For respawn
	self.respawn = function () {
		self.dir = Math.random() < 0.5 ? 1 : -1;
		self.speed = 6 + Math.random() * 4;
		self.vy = -2 + Math.random() * 4;
		self.osc = Math.random() * Math.PI * 2;
		// Start off-screen
		if (self.dir === 1) {
			self.x = -body.width - 20;
		} else {
			self.x = 2048 + body.width + 20;
		}
		self.y = 400 + Math.random() * (2732 - 800);
		self.rotation = self.dir === 1 ? 0 : Math.PI;
	};
	self.respawn();
	// Animate
	self.update = function () {
		self.x += self.speed * self.dir;
		self.y += self.vy + Math.sin(LK.ticks / 20 + self.osc) * 2;
		// If off screen, respawn
		if (self.dir === 1 && self.x > 2048 + 100 || self.dir === -1 && self.x < -100) {
			self.respawn();
		}
	};
	return self;
});
// Crab class (player)
var Crab = Container.expand(function () {
	var self = Container.call(this);
	// Body
	var body = self.attachAsset('crabBody', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Tummy (centered)
	var tummy = self.attachAsset('crabTummy', {
		anchorX: 0.5,
		anchorY: 0.5,
		y: 30
	});
	self.tummy = tummy;
	// Eyes
	var eyeL = self.attachAsset('crabEye', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: -50,
		y: -40
	});
	var eyeR = self.attachAsset('crabEye', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 50,
		y: -40
	});
	var pupilL = self.attachAsset('crabPupil', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: -50,
		y: -40
	});
	var pupilR = self.attachAsset('crabPupil', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 50,
		y: -40
	});
	// Mouth
	self.attachAsset('crabMouth', {
		anchorX: 0.5,
		anchorY: 0.5,
		y: 25
	});
	// Claws
	self.attachAsset('crabClaw', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: -110,
		y: 10,
		rotation: -0.5
	});
	self.attachAsset('crabClaw', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 110,
		y: 10,
		rotation: 0.5
	});
	// Legs (3 left, 3 right)
	for (var i = 0; i < 3; i++) {
		self.attachAsset('crabLeg', {
			anchorX: 0.5,
			anchorY: 0.1,
			x: -90 - i * 20,
			y: 60 + i * 10,
			rotation: -0.3 + i * 0.2
		});
		self.attachAsset('crabLeg', {
			anchorX: 0.5,
			anchorY: 0.1,
			x: 90 + i * 20,
			y: 60 + i * 10,
			rotation: 0.3 - i * 0.2
		});
	}
	// For dragging
	self.isDragging = false;
	// For a little smug animation
	self.smugTimer = 0;
	// Animate pupils to look at last bird
	self.lookAt = function (x, y) {
		var dxL = x - (self.x - 50);
		var dyL = y - (self.y - 40);
		var dxR = x - (self.x + 50);
		var dyR = y - (self.y - 40);
		var magL = Math.sqrt(dxL * dxL + dyL * dyL);
		var magR = Math.sqrt(dxR * dxR + dyR * dyR);
		var maxDist = 8;
		pupilL.x = -50 + (magL > 0 ? dxL / magL * maxDist : 0);
		pupilL.y = -40 + (magL > 0 ? dyL / magL * maxDist : 0);
		pupilR.x = 50 + (magR > 0 ? dxR / magR * maxDist : 0);
		pupilR.y = -40 + (magR > 0 ? dyR / magR * maxDist : 0);
	};
	// Animate smug bounce
	self.update = function () {
		self.smugTimer += 0.05;
		self.scaleX = 1 + Math.sin(self.smugTimer) * 0.03;
		self.scaleY = 1 + Math.cos(self.smugTimer) * 0.03;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0xf7e7b6 // Pale sand
});

/**** 
* Game Code
****/ 
// Sound
// Bird beak and eye (for all birds)
// Bird types (use different colors for each)
// Crab (player)
// Center crab horizontally, near bottom
var crab = new Crab();
crab.x = 2048 / 2;
crab.y = 2732 - 350;
game.addChild(crab);
// Birds array
var birds = [];
var NUM_BIRDS = 4;
for (var i = 0; i < NUM_BIRDS; i++) {
	var b = new Bird();
	birds.push(b);
	game.addChild(b);
}
// Score
var scoreTxt = new Text2('0', {
	size: 120,
	fill: 0xFF6F3C
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Tummy text (always empty)
var tummyTxt = new Text2('Tummy: Empty', {
	size: 60,
	fill: 0x7A2E00
});
tummyTxt.anchor.set(0.5, 0.5);
tummyTxt.x = 2048 / 2;
tummyTxt.y = 2732 - 120;
LK.gui.addChild(tummyTxt);
// Dragging
var dragNode = null;
function handleMove(x, y, obj) {
	if (dragNode) {
		// Clamp crab inside game area
		var crabW = crab.width / 2;
		var crabH = crab.height / 2;
		var minX = crabW + 40;
		var maxX = 2048 - crabW - 40;
		var minY = crabH + 40;
		var maxY = 2732 - crabH - 40;
		crab.x = Math.max(minX, Math.min(maxX, x));
		crab.y = Math.max(minY, Math.min(maxY, y));
	}
}
game.move = handleMove;
game.down = function (x, y, obj) {
	// Only start drag if not in top left 100x100
	if (x > 100 || y > 100) {
		dragNode = crab;
		handleMove(x, y, obj);
	}
};
game.up = function (x, y, obj) {
	dragNode = null;
};
// Main update
game.update = function () {
	// Animate crab
	crab.update();
	// Animate birds
	for (var i = 0; i < birds.length; i++) {
		birds[i].update();
	}
	// Check for collisions
	for (var i = 0; i < birds.length; i++) {
		var bird = birds[i];
		// Only check if bird is on screen
		if (bird.x > -150 && bird.x < 2048 + 150 && bird.y > 0 && bird.y < 2732) {
			if (crab.intersects(bird)) {
				// Paradox: bird is caught, but not really
				LK.setScore(LK.getScore() + 1);
				scoreTxt.setText(LK.getScore());
				// Play sound
				LK.getSound('catch').play();
				// Animate crab tummy (flash)
				LK.effects.flashObject(crab.tummy, 0xffe066, 400);
				// Animate bird (fade out and respawn)
				tween(bird, {
					alpha: 0
				}, {
					duration: 200,
					easing: tween.easeIn,
					onFinish: function onFinish() {
						bird.alpha = 1;
						bird.respawn();
					}
				});
				// Animate crab eyes to look at bird
				crab.lookAt(bird.x, bird.y);
				// Tummy always empty
				tummyTxt.setText('Tummy: Empty');
			}
		}
	}
};
// Set initial score
LK.setScore(0);
scoreTxt.setText('0');
// Set initial tummy text
tummyTxt.setText('Tummy: Empty');