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

/**** 
* Classes
****/ 
// Card class: represents a single card (creature or resource)
var Card = Container.expand(function () {
	var self = Container.call(this);
	// Card properties (to be set on creation)
	self.cardData = null; // {name, attack, health, cost, type, id}
	self.isPlayerCard = true; // true if belongs to player, false if opponent
	// Card visual
	var cardBox = self.attachAsset('cardBox', {
		width: 260,
		height: 360,
		color: 0x222222,
		shape: 'box',
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Card name
	var nameTxt = new Text2('', {
		size: 48,
		fill: "#fff"
	});
	nameTxt.anchor.set(0.5, 0);
	nameTxt.x = 0;
	nameTxt.y = -150;
	self.addChild(nameTxt);
	// Attack/Health with symbols
	var statsTxt = new Text2('', {
		size: 48,
		fill: 0xFFEC70
	});
	statsTxt.anchor.set(0.5, 0.5);
	statsTxt.x = -50;
	statsTxt.y = 120;
	self.addChild(statsTxt);
	// Cost
	var costTxt = new Text2('', {
		size: 40,
		fill: 0xB8B031
	});
	costTxt.anchor.set(0.5, 0.5);
	costTxt.x = 90;
	costTxt.y = 120;
	self.addChild(costTxt);
	// Set card data and visuals
	self.setCard = function (cardData, isPlayerCard) {
		self.cardData = cardData;
		self.isPlayerCard = isPlayerCard;
		nameTxt.setText(cardData.name);
		statsTxt.setText("⚔" + cardData.attack + " ♥" + cardData.health);
		costTxt.setText(cardData.cost);
		// Tint for opponent cards
		cardBox.tint = isPlayerCard ? 0x222222 : 0x2a1a2a;
	};
	// Update stats display
	self.updateStats = function () {
		if (self.cardData) {
			statsTxt.setText("⚔" + self.cardData.attack + " ♥" + self.cardData.health);
		}
	};
	// Flash effect for damage
	self.flash = function (color) {
		LK.effects.flashObject(self, color, 300);
	};
	// Selection properties
	self.isSelected = false;
	return self;
});
// Slot class: represents a board slot (for creatures)
var Slot = Container.expand(function () {
	var self = Container.call(this);
	self.isPlayerSlot = true;
	self.slotIndex = 0;
	self.occupied = false;
	self.card = null;
	var slotBox = self.attachAsset('slotBox', {
		width: 270,
		height: 380,
		color: 0x444444,
		shape: 'box',
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Highlight for valid drop
	self.setHighlight = function (on) {
		slotBox.tint = on ? 0x83de44 : 0x444444;
	};
	// Place card in slot
	self.placeCard = function (card) {
		self.card = card;
		self.occupied = true;
		card.x = self.x;
		card.y = self.y;
		card.isSelected = false;
		card.alpha = 1.0;
		game.addChild(card);
	};
	// Remove card from slot
	self.removeCard = function () {
		self.card = null;
		self.occupied = false;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x18181a
});

/**** 
* Game Code
****/ 
// --- Game Constants ---
var BOARD_COLS = 4;
var PLAYER_Y = 1950;
var OPPONENT_Y = 1150;
var HAND_Y = 2450;
var SLOT_SPACING = 340;
var HAND_SPACING = 320;
var MAX_HAND = 5;
var MAX_HEALTH = 10;
// --- Card Pool ---
var CARD_POOL = [{
	id: 1,
	name: "Stoat",
	attack: 1,
	health: 2,
	cost: 1,
	type: "creature"
}, {
	id: 2,
	name: "Wolf",
	attack: 3,
	health: 2,
	cost: 2,
	type: "creature"
}, {
	id: 3,
	name: "Bullfrog",
	attack: 1,
	health: 3,
	cost: 1,
	type: "creature"
}, {
	id: 4,
	name: "Adder",
	attack: 1,
	health: 1,
	cost: 2,
	type: "creature"
}, {
	id: 5,
	name: "Squirrel",
	attack: 0,
	health: 1,
	cost: 0,
	type: "resource"
}];
// --- Game State ---
var playerDeck = [];
var opponentDeck = [];
var playerHand = [];
var opponentHand = [];
var playerSlots = [];
var opponentSlots = [];
var playerHealth = MAX_HEALTH;
var opponentHealth = MAX_HEALTH;
var turn = "player"; // "player" or "opponent"
// Card selection variables
var selectedCard = null;
var canPlay = true;
var turnTxt, healthTxt, oppHealthTxt, messageTxt;
// --- UI Setup ---
// Card list removed
// Life display in top center
var lifeTxt = new Text2("♥ " + playerHealth + " | ♥ " + opponentHealth, {
	size: 80,
	fill: 0xFF6B6B
});
lifeTxt.anchor.set(0.5, 0);
lifeTxt.y = 20;
LK.gui.top.addChild(lifeTxt);
// Health display (keeping original for backward compatibility)
healthTxt = new Text2("You: " + playerHealth, {
	size: 80,
	fill: "#fff"
});
healthTxt.anchor.set(0, 0.5);
healthTxt.visible = false; // Hide original health display
LK.gui.top.addChild(healthTxt);
oppHealthTxt = new Text2("Opponent: " + opponentHealth, {
	size: 80,
	fill: "#fff"
});
oppHealthTxt.anchor.set(1, 0.5);
oppHealthTxt.visible = false; // Hide original health display
LK.gui.topRight.addChild(oppHealthTxt);
// Turn display
turnTxt = new Text2("Your Turn", {
	size: 70,
	fill: 0xFFEC70
});
turnTxt.anchor.set(0.5, 0.5);
turnTxt.y = 200; // Move lower
LK.gui.top.addChild(turnTxt);
// Blood system removed - using pure sacrifice
// Upper message display removed
// Lower message display removed
// --- End Turn Button ---
// Remove any previous button if present
if (typeof endTurnBtn !== "undefined" && endTurnBtn.parent) {
	endTurnBtn.parent.removeChild(endTurnBtn);
}
endTurnBtn = LK.getAsset('centerCircle', {
	width: 150,
	height: 150,
	color: 0xff0000,
	shape: 'ellipse',
	anchorX: 0.5,
	anchorY: 0.5,
	x: 1900,
	y: 1366
});
game.addChild(endTurnBtn);
// End turn button logic
endTurnBtn.interactive = true;
endTurnBtn.buttonMode = true;
endTurnBtn.visible = turn === "player";
endTurnBtn.down = function (x, y, obj) {
	if (turn === "player" && canPlay) {
		canPlay = false;
		endTurnBtn.visible = false;
		// Message displays removed
		LK.setTimeout(startOpponentTurn, 400);
	}
};
// --- Board Setup ---
// Player slots
for (var i = 0; i < BOARD_COLS; i++) {
	var slot = new Slot();
	slot.isPlayerSlot = true;
	slot.slotIndex = i;
	slot.x = 400 + i * SLOT_SPACING;
	slot.y = PLAYER_Y;
	playerSlots.push(slot);
	game.addChild(slot);
}
// Opponent slots
for (var i = 0; i < BOARD_COLS; i++) {
	var slot = new Slot();
	slot.isPlayerSlot = false;
	slot.slotIndex = i;
	slot.x = 400 + i * SLOT_SPACING;
	slot.y = OPPONENT_Y;
	opponentSlots.push(slot);
	game.addChild(slot);
}
// --- Deck/Hand Setup ---
function shuffleDeck(deck) {
	for (var i = deck.length - 1; i > 0; i--) {
		var j = Math.floor(Math.random() * (i + 1));
		var temp = deck[i];
		deck[i] = deck[j];
		deck[j] = temp;
	}
}
function createDeck() {
	// Player: 2 Stoat, 2 Wolf, 2 Bullfrog, 1 Adder, 3 Squirrel
	var deck = [];
	for (var i = 0; i < 2; i++) deck.push(CARD_POOL[0]);
	for (var i = 0; i < 2; i++) deck.push(CARD_POOL[1]);
	for (var i = 0; i < 2; i++) deck.push(CARD_POOL[2]);
	deck.push(CARD_POOL[3]);
	for (var i = 0; i < 3; i++) deck.push(CARD_POOL[4]);
	shuffleDeck(deck);
	return deck.slice();
}
function createOpponentDeck() {
	// Opponent: 2 Wolf, 2 Bullfrog, 2 Adder, 2 Squirrel
	var deck = [];
	for (var i = 0; i < 2; i++) deck.push(CARD_POOL[1]);
	for (var i = 0; i < 2; i++) deck.push(CARD_POOL[2]);
	for (var i = 0; i < 2; i++) deck.push(CARD_POOL[3]);
	for (var i = 0; i < 2; i++) deck.push(CARD_POOL[4]);
	shuffleDeck(deck);
	return deck.slice();
}
// --- Hand Display ---
function updateHandDisplay() {
	// Remove all player hand cards from game
	for (var i = 0; i < playerHand.length; i++) {
		if (playerHand[i].parent) playerHand[i].parent.removeChild(playerHand[i]);
	}
	// Layout hand
	for (var i = 0; i < playerHand.length; i++) {
		var card = playerHand[i];
		card.x = 400 + i * HAND_SPACING;
		card.y = HAND_Y;
		card.isPlayerCard = true;
		game.addChild(card);
	}
}
function updateOpponentHandDisplay() {
	// Remove all opponent hand cards from game
	for (var i = 0; i < opponentHand.length; i++) {
		if (opponentHand[i].parent) opponentHand[i].parent.removeChild(opponentHand[i]);
	}
	// Layout hand (hidden)
	for (var i = 0; i < opponentHand.length; i++) {
		var card = opponentHand[i];
		card.x = 400 + i * HAND_SPACING;
		card.y = OPPONENT_Y - 400;
		card.isPlayerCard = false;
		game.addChild(card);
	}
}
// --- Draw Card ---
function drawCard(deck, hand, isPlayer) {
	if (deck.length === 0 || hand.length >= MAX_HAND) return;
	var cardData = deck.shift();
	var card = new Card();
	card.setCard(cardData, isPlayer);
	hand.push(card);
}
// --- Start Game ---
function startGame() {
	playerDeck = createDeck();
	opponentDeck = createOpponentDeck();
	playerHand = [];
	opponentHand = [];
	playerHealth = MAX_HEALTH;
	opponentHealth = MAX_HEALTH;
	turn = "player";
	canPlay = true;
	// Message displays removed
	// Remove all cards from slots
	for (var i = 0; i < BOARD_COLS; i++) {
		if (playerSlots[i].card) {
			playerSlots[i].card.destroy();
			playerSlots[i].removeCard();
		}
		if (opponentSlots[i].card) {
			opponentSlots[i].card.destroy();
			opponentSlots[i].removeCard();
		}
	}
	// Draw initial hands
	for (var i = 0; i < 4; i++) drawCard(playerDeck, playerHand, true);
	for (var i = 0; i < 4; i++) drawCard(opponentDeck, opponentHand, false);
	updateHandDisplay();
	updateOpponentHandDisplay();
	updateUI();
}
function updateUI() {
	healthTxt.setText("You: " + playerHealth);
	oppHealthTxt.setText("Opponent: " + opponentHealth);
	if (typeof lifeTxt !== "undefined") {
		lifeTxt.setText("♥ " + playerHealth + " | ♥ " + opponentHealth);
	}
	turnTxt.setText(turn === "player" ? "Your Turn" : "Opponent Turn");
}
// --- Turn Logic ---
function startPlayerTurn() {
	turn = "player";
	canPlay = true;
	drawCard(playerDeck, playerHand, true);
	updateHandDisplay();
	updateUI();
	// Message displays removed
	if (typeof endTurnBtn !== "undefined") {
		endTurnBtn.visible = true;
	}
}
function startOpponentTurn() {
	turn = "opponent";
	canPlay = false;
	updateUI();
	// Message displays removed
	if (typeof endTurnBtn !== "undefined") {
		endTurnBtn.visible = false;
	}
	LK.setTimeout(opponentPlay, 900);
}
// --- Play Card ---
function canPlayCard(card, slot) {
	if (!card || !slot) return false;
	if (!slot.isPlayerSlot) return false;
	if (slot.occupied) return false;
	if (card.cardData.type === "resource") return true;
	// For creatures, check cost
	if (card.cardData.type === "creature") {
		// Cost 0 creatures can always be played
		if (card.cardData.cost === 0) return true;
		// For creatures with cost > 0, check if we have enough creatures to sacrifice
		var creaturesOnBoard = 0;
		for (var i = 0; i < playerSlots.length; i++) {
			if (playerSlots[i].card && playerSlots[i].card.cardData.type === "creature" && playerSlots[i] !== slot) {
				creaturesOnBoard++;
			}
		}
		// Check if we have enough creatures to sacrifice to cover the cost
		if (creaturesOnBoard >= card.cardData.cost) return true;
	}
	return false;
}
function playCard(card, slot) {
	if (!canPlayCard(card, slot)) return false;
	// Remove from hand
	var idx = playerHand.indexOf(card);
	if (idx !== -1) playerHand.splice(idx, 1);
	// Place in slot
	slot.placeCard(card);
	// Pay cost through sacrifice
	if (card.cardData.type === "creature" && card.cardData.cost > 0) {
		// Sacrifice creatures to pay the cost
		var costRemaining = card.cardData.cost;
		for (var i = 0; i < playerSlots.length && costRemaining > 0; i++) {
			if (playerSlots[i].card && playerSlots[i].card.cardData.type === "creature" && playerSlots[i] !== slot) {
				var sacrificeCard = playerSlots[i].card;
				sacrificeCard.flash(0xd83318);
				LK.setTimeout(function (slotToRemove, cardToDestroy) {
					return function () {
						slotToRemove.removeCard();
						cardToDestroy.destroy();
					};
				}(playerSlots[i], sacrificeCard), 300);
				costRemaining--;
			}
		}
	}
	// Squirrel: resource, stays in slot (no special blood effect)
	if (card.cardData.type === "resource") {
		card.flash(0xb8b031);
		// Squirrel remains in slot - no removal or destruction
	}
	updateHandDisplay();
	updateUI();
	return true;
}
// --- Card Sacrifice Selection ---
var selectedCardForSacrifice = null;
var sacrificeHighlight = null;
// Helper to clear sacrifice selection
function clearSacrificeSelection() {
	if (selectedCardForSacrifice) {
		// Remove highlight if any
		if (sacrificeHighlight && sacrificeHighlight.parent) {
			sacrificeHighlight.parent.removeChild(sacrificeHighlight);
		}
		sacrificeHighlight = null;
		selectedCardForSacrifice = null;
		// Clear all slot highlights
		for (var i = 0; i < playerSlots.length; i++) {
			playerSlots[i].setHighlight(false);
		}
	}
}
// Helper to highlight a card for sacrifice
function highlightCardForSacrifice(card) {
	if (sacrificeHighlight && sacrificeHighlight.parent) {
		sacrificeHighlight.parent.removeChild(sacrificeHighlight);
	}
	sacrificeHighlight = LK.getAsset('centerCircle', {
		width: 280,
		height: 380,
		color: 0x00ff00,
		shape: 'box',
		anchorX: 0.5,
		anchorY: 0.5,
		x: card.x,
		y: card.y
	});
	sacrificeHighlight.alpha = 0.3;
	// Place highlight below the card
	if (card.parent) {
		card.parent.addChildAt(sacrificeHighlight, 0);
	}
	// Highlight all slots to show where the card can be moved (both empty and occupied for replacement)
	for (var i = 0; i < playerSlots.length; i++) {
		playerSlots[i].setHighlight(true);
	}
}
// Helper function to clear card selection
function clearCardSelection() {
	if (selectedCard) {
		selectedCard.isSelected = false;
		// Remove any visual selection indicator
		selectedCard.alpha = 1.0;
		selectedCard = null;
		// Clear slot highlights
		for (var i = 0; i < playerSlots.length; i++) {
			playerSlots[i].setHighlight(false);
		}
	}
}
// Helper function to select a card
function selectCard(card) {
	clearCardSelection();
	selectedCard = card;
	card.isSelected = true;
	// Visual feedback for selected card
	card.alpha = 0.7;
	// Highlight available slots
	for (var i = 0; i < playerSlots.length; i++) {
		if (!playerSlots[i].occupied) {
			playerSlots[i].setHighlight(true);
		}
	}
}
// Click-based card selection and placement
game.down = function (x, y, obj) {
	// If we have a card already selected, check if clicking on a slot to place it
	if (selectedCard) {
		// Check if clicked on a slot
		for (var i = 0; i < playerSlots.length; i++) {
			var slot = playerSlots[i];
			var slotWidth = 270;
			var slotHeight = 380;
			var isInside = x >= slot.x - slotWidth / 2 && x <= slot.x + slotWidth / 2 && y >= slot.y - slotHeight / 2 && y <= slot.y + slotHeight / 2;
			if (!slot.occupied && isInside) {
				// Check if we can play this card (including blood cost check)
				if (canPlayCard(selectedCard, slot)) {
					// Play the selected card
					playCard(selectedCard, slot);
					clearCardSelection();
					return;
				} else {
					// Flash red to indicate insufficient resources
					LK.effects.flashObject(selectedCard, 0xff0000, 500);
					clearCardSelection();
					return;
				}
			}
		}
		// If clicked elsewhere, clear selection
		clearCardSelection();
		return;
	}
	// Check for sacrifice selection first (high-cost cards that need sacrifice)
	if (selectedCardForSacrifice) {
		// Check if clicked on a slot
		for (var i = 0; i < playerSlots.length; i++) {
			var slot = playerSlots[i];
			var slotWidth = 270;
			var slotHeight = 380;
			var isInside = x >= slot.x - slotWidth / 2 && x <= slot.x + slotWidth / 2 && y >= slot.y - slotHeight / 2 && y <= slot.y + slotHeight / 2;
			if (isInside) {
				// Check if we can sacrifice creatures for this card
				var card = selectedCardForSacrifice;
				var totalCostRequired = card.cardData.cost;
				// If slot is occupied, calculate replacement cost
				if (slot.occupied && slot.card.cardData.type === "creature") {
					var existingCard = slot.card;
					// Higher cost cards require more sacrifice, lower cost cards reduce requirement
					var costDifference = totalCostRequired - existingCard.cardData.cost;
					totalCostRequired = Math.max(0, costDifference);
				}
				// Count available creatures for sacrifice (excluding source slot and target slot)
				var availableCreatures = [];
				for (var j = 0; j < playerSlots.length; j++) {
					if (playerSlots[j].card && playerSlots[j].card.cardData.type === "creature" && playerSlots[j].card !== card && playerSlots[j] !== slot) {
						availableCreatures.push(playerSlots[j]);
					}
				}
				// Check if we have enough creatures to sacrifice
				if (availableCreatures.length >= totalCostRequired) {
					// Remove from hand if in hand
					var idx = playerHand.indexOf(card);
					if (idx !== -1) playerHand.splice(idx, 1);
					// Remove existing card from target slot if occupied (this counts as part of the sacrifice)
					if (slot.occupied && slot.card.cardData.type === "creature") {
						var replacedCard = slot.card;
						replacedCard.flash(0xd83318);
						LK.setTimeout(function (cardToDestroy) {
							return function () {
								cardToDestroy.destroy();
							};
						}(replacedCard), 300);
						slot.removeCard();
					}
					// Remove from old slot if it was on board
					var wasOnBoard = false;
					for (var j = 0; j < playerSlots.length; j++) {
						if (playerSlots[j].card === card) {
							playerSlots[j].removeCard();
							wasOnBoard = true;
							break;
						}
					}
					// Track the last sacrificed slot for card placement
					var lastSacrificedSlot = null;
					// Sacrifice creatures to pay the cost
					for (var k = 0; k < availableCreatures.length && k < totalCostRequired; k++) {
						var sacrificeSlot = availableCreatures[k];
						var sacrificeCard = sacrificeSlot.card;
						lastSacrificedSlot = sacrificeSlot; // Remember the last slot we sacrificed from
						sacrificeCard.flash(0xd83318);
						LK.setTimeout(function (slotToRemove, cardToDestroy) {
							return function () {
								slotToRemove.removeCard();
								cardToDestroy.destroy();
							};
						}(sacrificeSlot, sacrificeCard), 300);
					}
					// Place the card in the last sacrificed slot instead of the target slot
					var targetSlot = lastSacrificedSlot || slot;
					targetSlot.placeCard(card);
					clearSacrificeSelection();
					updateHandDisplay();
					updateUI();
					return;
				} else {
					// Not enough resources - flash red
					LK.effects.flashObject(card, 0xff0000, 500);
					clearSacrificeSelection();
					return;
				}
			}
		}
		// If not clicked on a slot, clear selection
		clearSacrificeSelection();
		return;
	}
	// Check if a card in hand is clicked for selection
	for (var i = 0; i < playerHand.length; i++) {
		var card = playerHand[i];
		var cardWidth = 260;
		var cardHeight = 360;
		var isInside = x >= card.x - cardWidth / 2 && x <= card.x + cardWidth / 2 && y >= card.y - cardHeight / 2 && y <= card.y + cardHeight / 2;
		if (isInside && turn === "player" && canPlay) {
			// Check if this card requires sacrifice (creatures with cost > 0)
			if (card.cardData.type === "creature" && card.cardData.cost > 0) {
				// This card requires sacrifice - use sacrifice system
				selectedCardForSacrifice = card;
				highlightCardForSacrifice(card);
				return;
			} else {
				// Regular card selection (for resources and cost 0 creatures)
				selectCard(card);
				return;
			}
		}
	}
	// Check if a card on the board is clicked for selection (only if turn is player and can play)
	if (turn === "player" && canPlay) {
		for (var i = 0; i < playerSlots.length; i++) {
			if (playerSlots[i].card && playerSlots[i].card.cardData.type === "creature") {
				var card = playerSlots[i].card;
				var cardWidth = 260;
				var cardHeight = 360;
				var isInside = x >= card.x - cardWidth / 2 && x <= card.x + cardWidth / 2 && y >= card.y - cardHeight / 2 && y <= card.y + cardHeight / 2;
				if (isInside) {
					// Only select for sacrifice if it's a high-cost creature that can be moved
					// or if we need to sacrifice it for another card
					selectedCardForSacrifice = card;
					highlightCardForSacrifice(card);
					return;
				}
			}
		}
	}
};
// No up handler needed for click-based system
// --- Combat Phase ---
function combatPhase() {
	// Player creatures attack
	for (var i = 0; i < BOARD_COLS; i++) {
		var pSlot = playerSlots[i];
		if (pSlot.card && pSlot.card.cardData.type === "creature") {
			var oppSlot = opponentSlots[i];
			if (oppSlot.card && oppSlot.card.cardData.type === "creature") {
				// Attack opposing creature
				oppSlot.card.cardData.health -= pSlot.card.cardData.attack;
				pSlot.card.flash(0xffec70);
				oppSlot.card.flash(0xd83318);
				oppSlot.card.updateStats();
				if (oppSlot.card.cardData.health <= 0) {
					LK.setTimeout(function (slot, card) {
						return function () {
							slot.removeCard();
							card.destroy();
						};
					}(oppSlot, oppSlot.card), 300);
				}
			} else {
				// Attack opponent directly
				opponentHealth -= pSlot.card.cardData.attack;
				if (opponentHealth < 0) opponentHealth = 0;
			}
		}
	}
	// Opponent creatures attack
	for (var i = 0; i < BOARD_COLS; i++) {
		var oSlot = opponentSlots[i];
		if (oSlot.card && oSlot.card.cardData.type === "creature") {
			var pSlot = playerSlots[i];
			if (pSlot.card && pSlot.card.cardData.type === "creature") {
				// Attack opposing creature
				pSlot.card.cardData.health -= oSlot.card.cardData.attack;
				oSlot.card.flash(0xffec70);
				pSlot.card.flash(0xd83318);
				pSlot.card.updateStats();
				if (pSlot.card.cardData.health <= 0) {
					LK.setTimeout(function (slot, card) {
						return function () {
							slot.removeCard();
							card.destroy();
						};
					}(pSlot, pSlot.card), 300);
				}
			} else {
				// Attack player directly
				playerHealth -= oSlot.card.cardData.attack;
				if (playerHealth < 0) playerHealth = 0;
			}
		}
	}
	updateUI();
	// Check win/lose
	if (playerHealth <= 0) {
		LK.effects.flashScreen(0xd83318, 1000);
		LK.showGameOver();
		return;
	}
	if (opponentHealth <= 0) {
		LK.effects.flashScreen(0x83de44, 1000);
		LK.showYouWin();
		return;
	}
	// Next turn
	if (turn === "player") {
		LK.setTimeout(startOpponentTurn, 900);
	} else {
		LK.setTimeout(startPlayerTurn, 900);
	}
}
// --- Opponent AI ---
function opponentPlay() {
	// Play first playable creature to empty slot
	var played = false;
	for (var i = 0; i < opponentHand.length; i++) {
		var card = opponentHand[i];
		if (card.cardData.type === "creature") {
			for (var j = 0; j < BOARD_COLS; j++) {
				var slot = opponentSlots[j];
				if (!slot.occupied) {
					// Play card
					opponentHand.splice(i, 1);
					slot.placeCard(card);
					played = true;
					break;
				}
			}
			if (played) break;
		}
	}
	// Draw a card
	drawCard(opponentDeck, opponentHand, false);
	updateOpponentHandDisplay();
	LK.setTimeout(combatPhase, 900);
}
// --- Game Update ---
game.update = function () {
	// No per-frame logic needed for MVP
};
// --- Deck Button ---
var deckBtn = LK.getAsset('cardBox', {
	width: 120,
	height: 160,
	color: 0x4a4a4a,
	shape: 'box',
	anchorX: 0.5,
	anchorY: 0.5,
	x: 150,
	y: HAND_Y - 200
});
game.addChild(deckBtn);
// Deck button label
var deckBtnTxt = new Text2("DECK", {
	size: 36,
	fill: "#fff"
});
deckBtnTxt.anchor.set(0.5, 0.5);
deckBtnTxt.x = 150;
deckBtnTxt.y = HAND_Y - 200;
game.addChild(deckBtnTxt);
// --- Deck View Screen ---
var deckViewScreen = new Container();
var deckViewBg = LK.getAsset('cardBox', {
	width: 1400,
	height: 1800,
	color: 0x2a2a2a,
	shape: 'box',
	anchorX: 0.5,
	anchorY: 0.5,
	x: 1024,
	y: 1366
});
deckViewScreen.addChild(deckViewBg);
var deckViewTitle = new Text2("DECK CONTENTS", {
	size: 80,
	fill: "#fff",
	fontWeight: "bold"
});
deckViewTitle.anchor.set(0.5, 0.5);
deckViewTitle.x = 1024;
deckViewTitle.y = 600;
deckViewScreen.addChild(deckViewTitle);
// Card count displays
var deckCountTexts = [];
for (var i = 0; i < CARD_POOL.length; i++) {
	var countTxt = new Text2("", {
		size: 60,
		fill: "#fff"
	});
	countTxt.anchor.set(0.5, 0.5);
	countTxt.x = 1024;
	countTxt.y = 800 + i * 120;
	deckViewScreen.addChild(countTxt);
	deckCountTexts.push(countTxt);
}
deckViewScreen.visible = false;
// Function to update deck view
function updateDeckView() {
	// Count cards in deck by ID
	var cardCounts = {};
	for (var i = 0; i < CARD_POOL.length; i++) {
		cardCounts[CARD_POOL[i].id] = 0;
	}
	for (var i = 0; i < playerDeck.length; i++) {
		var cardId = playerDeck[i].id;
		if (cardCounts[cardId] !== undefined) {
			cardCounts[cardId]++;
		}
	}
	// Update text displays
	for (var i = 0; i < CARD_POOL.length; i++) {
		var card = CARD_POOL[i];
		var count = cardCounts[card.id] || 0;
		deckCountTexts[i].setText(card.name + ": " + count + " remaining");
	}
}
// Deck button touch handlers
deckBtn.interactive = true;
deckBtn.buttonMode = true;
deckBtn.down = function (x, y, obj) {
	updateDeckView();
	deckViewScreen.visible = true;
};
deckBtn.up = function (x, y, obj) {
	deckViewScreen.visible = false;
};
// Also add touch handlers to the text for better usability
deckBtnTxt.interactive = true;
deckBtnTxt.buttonMode = true;
deckBtnTxt.down = function (x, y, obj) {
	updateDeckView();
	deckViewScreen.visible = true;
};
deckBtnTxt.up = function (x, y, obj) {
	deckViewScreen.visible = false;
};
// --- Start the game ---
startGame();
// Add deck view screen last to ensure it renders on top
game.addChild(deckViewScreen);
;

===================================================================
--- original.js
+++ change.js
@@ -395,11 +395,13 @@
 	if (!card || !slot) return false;
 	if (!slot.isPlayerSlot) return false;
 	if (slot.occupied) return false;
 	if (card.cardData.type === "resource") return true;
-	// For creatures, check if we have enough creatures to sacrifice
+	// For creatures, check cost
 	if (card.cardData.type === "creature") {
-		// Count available creatures for sacrifice (excluding the target slot)
+		// Cost 0 creatures can always be played
+		if (card.cardData.cost === 0) return true;
+		// For creatures with cost > 0, check if we have enough creatures to sacrifice
 		var creaturesOnBoard = 0;
 		for (var i = 0; i < playerSlots.length; i++) {
 			if (playerSlots[i].card && playerSlots[i].card.cardData.type === "creature" && playerSlots[i] !== slot) {
 				creaturesOnBoard++;
@@ -417,9 +419,9 @@
 	if (idx !== -1) playerHand.splice(idx, 1);
 	// Place in slot
 	slot.placeCard(card);
 	// Pay cost through sacrifice
-	if (card.cardData.type === "creature") {
+	if (card.cardData.type === "creature" && card.cardData.cost > 0) {
 		// Sacrifice creatures to pay the cost
 		var costRemaining = card.cardData.cost;
 		for (var i = 0; i < playerSlots.length && costRemaining > 0; i++) {
 			if (playerSlots[i].card && playerSlots[i].card.cardData.type === "creature" && playerSlots[i] !== slot) {
@@ -634,16 +636,16 @@
 		var cardWidth = 260;
 		var cardHeight = 360;
 		var isInside = x >= card.x - cardWidth / 2 && x <= card.x + cardWidth / 2 && y >= card.y - cardHeight / 2 && y <= card.y + cardHeight / 2;
 		if (isInside && turn === "player" && canPlay) {
-			// Check if this card requires sacrifice (any creature with cost > 0)
+			// Check if this card requires sacrifice (creatures with cost > 0)
 			if (card.cardData.type === "creature" && card.cardData.cost > 0) {
 				// This card requires sacrifice - use sacrifice system
 				selectedCardForSacrifice = card;
 				highlightCardForSacrifice(card);
 				return;
 			} else {
-				// Regular card selection (for resources like squirrels)
+				// Regular card selection (for resources and cost 0 creatures)
 				selectCard(card);
 				return;
 			}
 		}