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

/**** 
* Classes
****/ 
// Card class: represents a single card in the 3 card shuffle game
var Card = Container.expand(function () {
	var self = Container.call(this);
	// Card states: 'faceup', 'facedown', 'revealed'
	self.state = 'facedown';
	self.isPrize = false;
	self.index = 0; // 0,1,2 for left, center, right
	// Card dimensions
	var cardWidth = 350;
	var cardHeight = 500;
	// Face down color
	var backColor = 0x444444;
	// Face up color
	var faceColor = 0xffffff;
	// Prize color
	var prizeColor = 0xffd700;
	// Card back (facedown)
	var back = self.attachAsset('cardBack', {
		width: cardWidth,
		height: cardHeight,
		color: backColor,
		shape: 'box',
		anchorX: 0.5,
		anchorY: 1
	});
	// Card face (faceup)
	var face = self.attachAsset('cardFace', {
		width: cardWidth,
		height: cardHeight,
		color: faceColor,
		shape: 'box',
		anchorX: 0.5,
		anchorY: 1
	});
	face.visible = false;
	// Prize indicator (only visible if isPrize and faceup)
	var prize = self.attachAsset('prizeCircle', {
		width: 120,
		height: 120,
		color: prizeColor,
		shape: 'ellipse',
		anchorX: 0.5,
		anchorY: 0.5,
		x: 0,
		y: -cardHeight / 2
	});
	prize.visible = false;
	// For tap feedback
	var highlight = self.attachAsset('highlight', {
		width: cardWidth + 20,
		height: cardHeight + 20,
		color: 0x00ff00,
		shape: 'box',
		anchorX: 0.5,
		anchorY: 1
	});
	highlight.alpha = 0;
	highlight.visible = true;
	// Card label (for debugging or future use)
	// var label = new Text2('', {size: 60, fill: "#222"});
	// label.anchor.set(0.5, 0.5);
	// label.x = 0;
	// label.y = -cardHeight / 2;
	// self.addChild(label);
	// Set card state: 'faceup', 'facedown', 'revealed'
	self.setState = function (state) {
		self.state = state;
		if (state === 'faceup') {
			face.visible = true;
			back.visible = false;
			prize.visible = self.isPrize;
		} else if (state === 'facedown') {
			face.visible = false;
			back.visible = true;
			prize.visible = false;
		} else if (state === 'revealed') {
			face.visible = true;
			back.visible = false;
			prize.visible = self.isPrize;
		}
	};
	// Show highlight (for tap feedback)
	self.flashHighlight = function () {
		highlight.alpha = 0.5;
		tween(highlight, {
			alpha: 0
		}, {
			duration: 400,
			easing: tween.linear
		});
	};
	// Card tap event
	self.down = function (x, y, obj) {
		if (typeof onCardTap === 'function') {
			onCardTap(self);
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x003300
});

/**** 
* Game Code
****/ 
// Game constants
var CARD_SPACING = 420;
var CARD_YS = [900, 1500, 2100]; // y positions for 3 rows
var cardWidth = 350;
var cardHeight = 500;
var maxRounds = 9; // Only up to 9 cards (3 rows of 3)
// Game state
var cards = [];
var prizeIndex = 0;
var round = 1;
var shuffling = false;
var canPick = false;
var score = 0;
var shuffleCount = 3;
var shuffleSpeed = 500;
var pickTimeout = undefined;
// Helper: get card positions for indices 0..n-1, centered in up to 3 rows
function getCardPos(idx, numCards) {
	// Determine row and column for up to 9 cards (3x3)
	var row, col, rowCardCount, colInRow;
	if (numCards <= 3) {
		row = 0;
		rowCardCount = numCards;
		colInRow = idx;
	} else if (numCards <= 6) {
		// 4-6 cards: fill first row, then start second row
		if (idx < 3) {
			row = 0;
			rowCardCount = Math.min(3, numCards);
			colInRow = idx;
		} else {
			row = 1;
			rowCardCount = numCards - 3;
			colInRow = idx - 3;
		}
	} else {
		// 7-9 cards: fill first two rows, then third row
		if (idx < 3) {
			row = 0;
			rowCardCount = 3;
			colInRow = idx;
		} else if (idx < 6) {
			row = 1;
			rowCardCount = 3;
			colInRow = idx - 3;
		} else {
			row = 2;
			rowCardCount = numCards - 6;
			colInRow = idx - 6;
		}
	}
	// Center cards in their row
	var totalWidth = (rowCardCount - 1) * CARD_SPACING;
	var startX = 2048 / 2 - totalWidth / 2;
	return {
		x: startX + colInRow * CARD_SPACING,
		y: CARD_YS[row]
	};
}
// GUI elements
var scoreTxt = new Text2('Score: 0', {
	size: 110,
	fill: "#fff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var roundTxt = new Text2('Round 1', {
	size: 80,
	fill: "#fff"
});
roundTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(roundTxt);
roundTxt.y = 120;
// Message text (centered)
var messageTxt = new Text2('', {
	size: 120,
	fill: "#fff"
});
messageTxt.anchor.set(0.5, 0.5);
LK.gui.center.addChild(messageTxt);
messageTxt.visible = false;
// Helper: show message in center for ms milliseconds
function showMessage(msg, ms) {
	messageTxt.setText(msg);
	messageTxt.visible = true;
	if (ms) {
		LK.setTimeout(function () {
			messageTxt.visible = false;
		}, ms);
	}
}
// Helper: update score and round display
function updateGUI() {
	scoreTxt.setText('Score: ' + score);
	roundTxt.setText('Round ' + round);
}
// Helper: reset all cards to facedown
function allCardsFacedown() {
	for (var i = 0; i < cards.length; i++) {
		cards[i].setState('facedown');
	}
}
// Helper: flip all cards faceup (show prize)
function allCardsFaceup() {
	for (var i = 0; i < cards.length; i++) {
		cards[i].setState('faceup');
	}
}
// Helper: reveal all cards (show which had prize)
function revealAllCards() {
	for (var i = 0; i < cards.length; i++) {
		cards[i].setState('revealed');
	}
}
// (Moved and updated getCardPos above to take numCards argument)
// Helper: shuffle array in place
function shuffleArray(arr) {
	for (var i = arr.length - 1; i > 0; i--) {
		var j = Math.floor(Math.random() * (i + 1));
		var temp = arr[i];
		arr[i] = arr[j];
		arr[j] = temp;
	}
}
// Helper: animate swap between two cards
function animateSwap(cardA, cardB, duration, onFinish) {
	var ax = cardA.x,
		ay = cardA.y;
	var bx = cardB.x,
		by = cardB.y;
	tween(cardA, {
		x: bx,
		y: by
	}, {
		duration: duration,
		easing: tween.cubicInOut
	});
	tween(cardB, {
		x: ax,
		y: ay
	}, {
		duration: duration,
		easing: tween.cubicInOut,
		onFinish: onFinish
	});
}
// Helper: perform a shuffle sequence (array of swaps)
function performShuffleSequence(swaps, idx, onFinish) {
	if (idx >= swaps.length) {
		if (onFinish) onFinish();
		return;
	}
	var pair = swaps[idx];
	animateSwap(cards[pair[0]], cards[pair[1]], shuffleSpeed, function () {
		// Swap card objects in array
		var temp = cards[pair[0]];
		cards[pair[0]] = cards[pair[1]];
		cards[pair[1]] = temp;
		// Update indices
		for (var i = 0; i < cards.length; i++) {
			cards[i].index = i;
		}
		performShuffleSequence(swaps, idx + 1, onFinish);
	});
}
// Helper: generate a random shuffle sequence (array of [i,j] swaps)
function generateShuffleSequence(count) {
	var swaps = [];
	var numCards = cards.length;
	if (numCards < 2) return swaps;
	// Make the prize card get shuffled more than the others
	var prizeSwaps = Math.max(2, Math.floor(count * 0.6)); // 60% of swaps involve the prize card
	var otherSwaps = count - prizeSwaps;
	// First, shuffle the prize card with random others
	for (var i = 0; i < prizeSwaps; i++) {
		var a = prizeIndex;
		var b;
		do {
			b = Math.floor(Math.random() * numCards);
		} while (b === a);
		swaps.push([a, b]);
	}
	// Then, shuffle random pairs (not always involving the prize card)
	for (var i = 0; i < otherSwaps; i++) {
		var a = Math.floor(Math.random() * numCards);
		var b;
		do {
			b = Math.floor(Math.random() * numCards);
		} while (b === a);
		swaps.push([a, b]);
	}
	// Shuffle the swaps array so the prize swaps are not all at the start
	shuffleArray(swaps);
	return swaps;
}
// Start a new round
function startRound() {
	shuffling = false;
	canPick = false;
	updateGUI();
	// Determine number of cards for this round (start at 2, max 9)
	var numCards = Math.min(2 + (round - 1), maxRounds);
	// Add new card if needed
	while (cards.length < numCards) {
		var card = new Card();
		card.index = cards.length;
		card.setState('facedown');
		cards.push(card);
		game.addChild(card);
	}
	// Remove extra cards if any (shouldn't happen, but defensive)
	while (cards.length > numCards) {
		var removed = cards.pop();
		removed.destroy();
	}
	// Place cards in initial positions (using new getCardPos for 3 rows)
	for (var i = 0; i < cards.length; i++) {
		var pos = getCardPos(i, cards.length);
		cards[i].x = pos.x;
		cards[i].y = pos.y;
		cards[i].index = i;
		cards[i].isPrize = false;
		cards[i].setState('facedown');
	}
	// Randomly assign prize
	prizeIndex = Math.floor(Math.random() * cards.length);
	cards[prizeIndex].isPrize = true;
	// Show all cards faceup for 1s
	allCardsFaceup();
	showMessage('Find the Prize!', 1000);
	LK.setTimeout(function () {
		// Flip all cards facedown
		allCardsFacedown();
		LK.setTimeout(function () {
			// Start shuffling
			shuffleCount = 3 + round; // Increase shuffle count per round
			// Make shuffling faster each round: start at 600ms, decrease by 40ms per round, min 180ms
			shuffleSpeed = Math.max(180, 600 - (round - 1) * 40);
			var swaps = generateShuffleSequence(shuffleCount);
			shuffling = true;
			performShuffleSequence(swaps, 0, function () {
				shuffling = false;
				canPick = true;
				showMessage('Pick a Card!', 800);
				// Set a timer for player to pick a card (e.g. 5 seconds)
				if (typeof pickTimeout !== "undefined") {
					LK.clearTimeout(pickTimeout);
					pickTimeout = undefined;
				}
				pickTimeout = LK.setTimeout(function () {
					if (canPick) {
						canPick = false;
						revealAllCards();
						showMessage('Time\'s up!', 1200);
						LK.effects.flashScreen(0xff0000, 600);
						LK.setTimeout(function () {
							LK.showGameOver();
						}, 1300);
					}
				}, 5000 - Math.min(3000, round * 200)); // Slightly less time as rounds increase
			});
		}, 500);
	}, 1000);
}
// Card tap handler
function onCardTap(card) {
	if (!canPick || shuffling) return;
	canPick = false;
	if (typeof pickTimeout !== "undefined") {
		LK.clearTimeout(pickTimeout);
		pickTimeout = undefined;
	}
	card.flashHighlight();
	// Reveal all cards
	revealAllCards();
	if (card.isPrize) {
		score += 1;
		updateGUI();
		showMessage('Correct!', 900);
		LK.effects.flashObject(card, 0x00ff00, 600);
		LK.setTimeout(function () {
			nextRound();
		}, 1100);
	} else {
		showMessage('Wrong!', 1200);
		LK.effects.flashObject(card, 0xff0000, 600);
		LK.setTimeout(function () {
			// Show game over
			LK.showGameOver();
		}, 1300);
	}
}
// Next round or win
function nextRound() {
	round += 1;
	if (round > maxRounds) {
		showMessage('You Win!', 1500);
		LK.setTimeout(function () {
			LK.showYouWin();
		}, 1700);
	} else {
		startRound();
	}
}
// --- Game setup ---
// Prevent cards from being placed in top left 100x100
// (Cards are at y=1800, so this is always satisfied)
// Start first round after short delay
LK.setTimeout(function () {
	startRound();
}, 600);
// --- Game update loop (not used for logic, but could be used for future animations) ---
game.update = function () {
	// No per-frame logic needed for MVP
};