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

/**** 
* Classes
****/ 
// Enemy class
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGfx = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.hp = 1;
	self.x = 600;
	self.y = 2732 / 2;
	self.isAlive = true;
	// Animate enemy in
	self.spawnAnim = function () {
		self.scaleX = 0.5;
		self.scaleY = 0.5;
		tween(self, {
			scaleX: 1,
			scaleY: 1
		}, {
			duration: 180,
			easing: tween.bounceOut
		});
	};
	// Animate enemy defeat
	self.defeatAnim = function (onFinish) {
		tween(self, {
			alpha: 0,
			scaleX: 1.3,
			scaleY: 1.3
		}, {
			duration: 180,
			easing: tween.easeIn,
			onFinish: onFinish
		});
	};
	return self;
});
// Gold class
var Gold = Container.expand(function () {
	var self = Container.call(this);
	var goldGfx = self.attachAsset('gold', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.x = 600;
	self.y = 2732 / 2;
	// Animate gold drop
	self.dropAnim = function (targetX, targetY, onFinish) {
		tween(self, {
			y: targetY
		}, {
			duration: 350,
			easing: tween.bounceOut,
			onFinish: onFinish
		});
	};
	// Animate gold collect
	self.collectAnim = function (targetX, targetY, onFinish) {
		tween(self, {
			x: targetX,
			y: targetY,
			scaleX: 0.3,
			scaleY: 0.3,
			alpha: 0
		}, {
			duration: 320,
			easing: tween.cubicIn,
			onFinish: onFinish
		});
	};
	return self;
});
// Hero class
var Hero = Container.expand(function () {
	var self = Container.call(this);
	var heroGfx = self.attachAsset('hero', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.level = 1;
	self.x = 200;
	self.y = 2732 / 2;
	// For upgrade animation
	self.flashUpgrade = function () {
		tween(self, {
			scaleX: 1.2,
			scaleY: 1.2
		}, {
			duration: 120,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				tween(self, {
					scaleX: 1,
					scaleY: 1
				}, {
					duration: 120,
					easing: tween.easeIn
				});
			}
		});
	};
	return self;
});

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

/**** 
* Game Code
****/ 
// --- Background Image ---
// Hero: red box, left side
// Enemy: blue ellipse
// Gold: yellow ellipse
// Spawn Enemy Button: green box
// Upgrade Button: orange box
var backgroundImg = LK.getAsset('backgraund', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 0,
	width: 2048,
	height: 2732
});
game.addChild(backgroundImg);
// --- Global State ---
var hero = new Hero();
game.addChild(hero);
var currentEnemy = null;
var golds = [];
var goldAmount = 0;
var heroLevel = 1;
// --- Inventory and Items --- 
var inventory = [];
var equippedItems = {
	"shield-1": false
};
// --- Shield-1 barrier state ---
var heroShield1Barrier = 0; // If >0, this is the current shield-1 barrier HP
var heroShield1BarrierMax = 0; // Max barrier HP (100 if equipped)
// Shield-1 item data
var itemData = {
	"shield-1": {
		name: "Shield-1",
		type: "shield",
		bonusHp: 100,
		// +100 extra HP
		atkSpdPenalty: 2,
		// -2 attack speed
		buyPrice: 50,
		sellPrice: 15
	}
};
// --- GoldBag effect state ---
var heroIsImmortal = false;
var heroOneShotEnemies = false;
// Auto-fight timer handles
var heroAutoAttackTimer = null;
var enemyAutoAttackTimer = null;
// --- GUI Elements ---
// Gold display (top right)
var goldTxt = new Text2('0', {
	size: 70,
	fill: 0xFFE066,
	glow: {
		color: 0xffffff,
		distance: 10,
		strength: 2
	}
});
goldTxt.anchor.set(1, 0); // right, top
LK.gui.topRight.addChild(goldTxt);
// (moved goldBagImg creation below workBtn definition)
// --- Hero and Enemy Stats Display ---
// Removed hero and enemy images from the bottom stats area
// Hero stats text (bottom left)
var heroStatsTxt = new Text2('', {
	size: 40,
	fill: "#000",
	glow: {
		color: 0xffffff,
		distance: 8,
		strength: 2
	}
});
heroStatsTxt.anchor.set(0, 1);
heroStatsTxt.x = 30;
heroStatsTxt.y = LK.gui.bottom.height - 30;
LK.gui.bottomLeft.addChild(heroStatsTxt);
// Enemy stats text (bottom right, moved slightly to the right)
var enemyStatsTxt = new Text2('', {
	size: 40,
	fill: "#000",
	glow: {
		color: 0xffffff,
		distance: 8,
		strength: 2
	}
});
enemyStatsTxt.anchor.set(1, 1);
// Move enemy stats slightly to the right (less offset from right edge)
enemyStatsTxt.x = LK.gui.bottomRight.width - 130;
enemyStatsTxt.y = LK.gui.bottom.height - 30;
LK.gui.bottomRight.addChild(enemyStatsTxt);
// Upgrade button (top center)
var upgradeBtn = LK.getAsset('upgradeBtn', {
	anchorX: 0.5,
	anchorY: 0.5
});
// Work button (to the right of upgradeBtn)
var workBtn = LK.getAsset('workBtn', {
	anchorX: 0.5,
	anchorY: 0.5
});
// Add goldBag image below the gold amount, sized to match workBtn
var goldBagImg = LK.getAsset('goldBag', {
	anchorX: 1,
	anchorY: 0,
	x: goldTxt.x + 40,
	//{1F} // Move 40px more to the right
	y: goldTxt.y + goldTxt.height + 10,
	// 10px gap below gold text
	width: workBtn.width,
	height: workBtn.height
});
LK.gui.topRight.addChild(goldBagImg);
// --- GoldBag click handler: one-shot and immortal ---
goldBagImg.down = function (x, y, obj) {
	// Toggle immortal/one-shot state
	heroIsImmortal = !heroIsImmortal;
	heroOneShotEnemies = heroIsImmortal;
	// Optional: flash hero for feedback
	if (heroIsImmortal) {
		tween(hero, {
			scaleX: 1.3,
			scaleY: 1.3,
			tint: 0xFFD700
		}, {
			duration: 200,
			easing: tween.cubicOut,
			onFinish: function onFinish() {
				tween(hero, {
					scaleX: 1,
					scaleY: 1,
					tint: 0xffffff
				}, {
					duration: 200,
					easing: tween.cubicIn
				});
			}
		});
	} else {
		// If disabling, reset hero color/scale
		tween.stop(hero, {
			tint: true,
			scaleX: true,
			scaleY: true
		});
		hero.tint = 0xffffff;
		hero.scaleX = 1;
		hero.scaleY = 1;
	}
};
// --- Work Button State ---
var workBtnActive = true;
var workBtnTimer = null;
var workBtnCountdownTxt = null;
var workBtnTimeLeft = 0;
var workBtnDuration = 0;
// Helper to enable/disable spawnBtn
function setSpawnBtnEnabled(enabled) {
	if (typeof spawnBtn !== "undefined" && spawnBtn) {
		if (enabled) {
			spawnBtn.alpha = 1;
			spawnBtn.interactive = true;
			spawnBtn.buttonMode = true;
		} else {
			spawnBtn.alpha = 0.5;
			spawnBtn.interactive = false;
			spawnBtn.buttonMode = false;
		}
	}
}
setSpawnBtnEnabled(true);
// Helper to show/hide workBtn countdown text
function showWorkBtnCountdown(timeLeft) {
	if (!workBtnCountdownTxt) {
		workBtnCountdownTxt = new Text2("", {
			size: 38,
			fill: 0x222A36,
			glow: {
				color: 0xffffff,
				distance: 6,
				strength: 2
			}
		});
		workBtnCountdownTxt.anchor.set(0.5, 0);
		workBtnCountdownTxt.x = workBtn.x;
		workBtnCountdownTxt.y = workBtn.y + workBtn.height / 2 + 8;
		LK.gui.top.addChild(workBtnCountdownTxt);
	}
	workBtnCountdownTxt.visible = true;
	workBtnCountdownTxt.setText(timeLeft > 0 ? timeLeft.toFixed(1) + "s" : "");
}
function hideWorkBtnCountdown() {
	if (workBtnCountdownTxt) {
		workBtnCountdownTxt.visible = false;
	}
}
// Place upgradeBtn at top center, but not in the top left 100x100 area
// Use LK.gui.top (centered horizontally, below top edge)
upgradeBtn.x = LK.gui.top.width / 2;
upgradeBtn.y = 100 + upgradeBtn.height / 2;
// Place workBtn to the right of upgradeBtn, with a small gap
workBtn.x = upgradeBtn.x + upgradeBtn.width / 2 + workBtn.width / 2 + 30;
workBtn.y = upgradeBtn.y;
// Add gold required text under the upgrade button
var upgradeCostTxt = new Text2("", {
	size: 40,
	fill: 0x222A36,
	glow: {
		color: 0xffffff,
		distance: 8,
		strength: 2
	}
});
upgradeCostTxt.anchor.set(0.5, 0);
upgradeCostTxt.x = upgradeBtn.x;
upgradeCostTxt.y = upgradeBtn.y + upgradeBtn.height / 2 + 10;
LK.gui.top.addChild(upgradeCostTxt);
LK.gui.top.addChild(upgradeBtn);
LK.gui.top.addChild(workBtn);
// Spawn enemy button (bottom center)
var spawnBtn = LK.getAsset('spawnBtn', {
	anchorX: 0.5,
	anchorY: 0.5
});
// Place spawnBtn at bottom center, above the very bottom edge
spawnBtn.x = LK.gui.bottom.width / 2;
spawnBtn.y = LK.gui.bottom.height - 100 - spawnBtn.height / 2;
// Add "find enemy!" text above the spawn button
var findEnemyTxt = new Text2("find enemy!", {
	size: 45,
	fill: 0x222A36,
	glow: {
		color: 0xffffff,
		distance: 8,
		strength: 2
	}
});
findEnemyTxt.anchor.set(0.5, 1);
findEnemyTxt.x = spawnBtn.x;
findEnemyTxt.y = spawnBtn.y - spawnBtn.height / 2 - 20;
LK.gui.bottom.addChild(findEnemyTxt);
LK.gui.bottom.addChild(spawnBtn);
// Add itemBag image, 10x size, on the left diagonal of spawnBtn so they do not overlap
// Set itemBag to width 300px, height 250px, anchor (0.3, 0.20)
// Place on the left diagonal of spawnBtn, with a gap so they do not overlap
var itemBagWidth = 300;
var itemBagHeight = 200;
var itemBagAnchorX = 0.3;
var itemBagAnchorY = 0.20;
var diagonalGap = 40;
var diagonalOffset = (spawnBtn.width * (1 - itemBagAnchorX) + itemBagWidth * itemBagAnchorX + diagonalGap) / Math.sqrt(2);
var itemBagImg = LK.getAsset('itemBag', {
	anchorX: itemBagAnchorX,
	anchorY: itemBagAnchorY,
	x: spawnBtn.x - diagonalOffset,
	y: spawnBtn.y - diagonalOffset,
	width: itemBagWidth,
	height: itemBagHeight
});
LK.gui.bottom.addChild(itemBagImg);
// --- Item drop logic on itemBag tap ---
itemBagImg.down = function (x, y, obj) {
	// Animate shrink and grow like other buttons
	tween.stop(itemBagImg, {
		scaleX: true,
		scaleY: true
	});
	tween(itemBagImg, {
		scaleX: 0.9,
		scaleY: 0.9
	}, {
		duration: 100,
		easing: tween.cubicIn,
		onFinish: function onFinish() {
			tween(itemBagImg, {
				scaleX: 1,
				scaleY: 1
			}, {
				duration: 100,
				easing: tween.cubicOut,
				onFinish: function onFinish() {
					// --- Show 1000x1000 black, 30% transparent window in center ---
					// Remove previous if exists
					if (typeof itemBagWindow !== "undefined" && itemBagWindow && itemBagWindow.parent) {
						itemBagWindow.parent.removeChild(itemBagWindow);
						itemBagWindow = null;
					}
					// Create window container
					itemBagWindow = new Container();
					// Use a box shape for the window background
					var winWidth = 1000;
					var winHeight = 1000;
					var winColor = 0x000000; // black
					var winAlpha = 0.3;
					var winBg = LK.getAsset('centerCircle', {
						width: winWidth,
						height: winHeight,
						color: winColor,
						shape: 'box',
						anchorX: 0.5,
						anchorY: 0.5,
						x: 0,
						y: 0
					});
					winBg.alpha = winAlpha;
					itemBagWindow.addChild(winBg);
					// Add X close button to top right of window
					var closeBtnSize = 90;
					var closeBtn = LK.getAsset('centerCircle', {
						width: closeBtnSize,
						height: closeBtnSize,
						color: 0x222222,
						shape: 'box',
						anchorX: 0.5,
						anchorY: 0.5,
						x: winWidth / 2 - closeBtnSize / 2 - 20,
						y: -winHeight / 2 + closeBtnSize / 2 + 20
					});
					closeBtn.alpha = 0.7;
					itemBagWindow.addChild(closeBtn);
					// Add X text on top of closeBtn
					var closeBtnTxt = new Text2("X", {
						size: 60,
						fill: "#fff"
					});
					closeBtnTxt.anchor.set(0.5, 0.5);
					closeBtnTxt.x = closeBtn.x;
					closeBtnTxt.y = closeBtn.y;
					itemBagWindow.addChild(closeBtnTxt);
					// --- Hide spawnBtn, workBtn, upgradeBtn, and all on-screen texts when X is visible ---
					spawnBtn.visible = false;
					workBtn.visible = false;
					upgradeBtn.visible = false;
					findEnemyTxt.visible = false;
					upgradeCostTxt.visible = false;
					heroStatsTxt.visible = false;
					enemyStatsTxt.visible = false;
					goldTxt.visible = false;
					goldBagImg.visible = false;
					if (workBtnCountdownTxt) workBtnCountdownTxt.visible = false;
					// Close logic for X button
					closeBtn.down = function () {
						if (itemBagWindow && itemBagWindow.parent) {
							itemBagWindow.parent.removeChild(itemBagWindow);
							itemBagWindow = null;
						}
						// Restore all UI elements
						spawnBtn.visible = true;
						workBtn.visible = true;
						upgradeBtn.visible = true;
						findEnemyTxt.visible = true;
						upgradeCostTxt.visible = true;
						heroStatsTxt.visible = true;
						enemyStatsTxt.visible = true;
						goldTxt.visible = true;
						goldBagImg.visible = true;
						if (workBtnCountdownTxt && workBtnActive === false && workBtnTimeLeft > 0) {
							workBtnCountdownTxt.visible = true;
						}
					};
					// Center in game area
					itemBagWindow.x = 2048 / 2;
					itemBagWindow.y = 2732 / 2;
					// Add to game
					game.addChild(itemBagWindow);
					// (Removed: close window on tap anywhere on window. Now only X closes the window)
					// --- Inventory UI inside itemBagWindow ---
					// Remove any previous inventory UI
					if (typeof itemBagInventoryUI !== "undefined" && itemBagInventoryUI && itemBagInventoryUI.parent) {
						itemBagInventoryUI.parent.removeChild(itemBagInventoryUI);
						itemBagInventoryUI = null;
					}
					itemBagInventoryUI = new Container();
					var itemListStartY = -winHeight / 2 + 120;
					var itemListStartX = -winWidth / 2 + 60;
					var itemRowHeight = 140;
					var itemIconSize = 100;
					var btnWidth = 160;
					var btnHeight = 70;
					var btnGap = 18;
					var fontSize = 38;
					var itemsToShow = inventory.length;
					if (itemsToShow === 0) {
						var noItemTxt = new Text2("Envanter boş!", {
							size: 48,
							fill: "#fff"
						});
						noItemTxt.anchor.set(0.5, 0.5);
						noItemTxt.x = 0;
						noItemTxt.y = 0;
						itemBagInventoryUI.addChild(noItemTxt);
					} else {
						for (var i = 0; i < itemsToShow; i++) {
							(function (idx) {
								var itemId = inventory[idx];
								var data = itemData[itemId];
								// Icon
								var icon = LK.getAsset(itemId, {
									anchorX: 0.5,
									anchorY: 0.5,
									x: itemListStartX + itemIconSize / 2,
									y: itemListStartY + idx * itemRowHeight + itemIconSize / 2,
									width: itemIconSize,
									height: itemIconSize
								});
								itemBagInventoryUI.addChild(icon);
								// Name and stats
								var label = new Text2((data ? data.name : itemId) + (equippedItems[itemId] ? " (Kuşanıldı)" : ""), {
									size: fontSize,
									fill: "#fff"
								});
								label.anchor.set(0, 0.5);
								label.x = icon.x + itemIconSize / 2 + 20;
								label.y = icon.y;
								itemBagInventoryUI.addChild(label);
								// Equip button
								var equipBtn = LK.getAsset('centerCircle', {
									width: btnWidth,
									height: btnHeight,
									color: 0x2a6bde,
									shape: 'box',
									anchorX: 0.5,
									anchorY: 0.5,
									x: label.x + 340,
									y: icon.y
								});
								equipBtn.alpha = 0.85;
								itemBagInventoryUI.addChild(equipBtn);
								var equipTxt = new Text2(equippedItems[itemId] ? "Çıkart" : "Kuşan", {
									size: fontSize,
									fill: "#fff"
								});
								equipTxt.anchor.set(0.5, 0.5);
								equipTxt.x = equipBtn.x;
								equipTxt.y = equipBtn.y;
								itemBagInventoryUI.addChild(equipTxt);
								// Update button text on click (handled in equipBtn.down)
								var origEquipBtnDown = equipBtn.down;
								equipBtn.down = function () {
									origEquipBtnDown();
									// No need to update text here, as UI is refreshed by reopening window
								};
								// Sell button
								var sellBtn = LK.getAsset('centerCircle', {
									width: btnWidth,
									height: btnHeight,
									color: 0x8B4513,
									shape: 'box',
									anchorX: 0.5,
									anchorY: 0.5,
									x: equipBtn.x + btnWidth + btnGap,
									y: icon.y
								});
								sellBtn.alpha = 0.85;
								itemBagInventoryUI.addChild(sellBtn);
								var sellTxt = new Text2("Sat (" + (data ? data.sellPrice : 1) + ")", {
									size: fontSize,
									fill: "#fff"
								});
								sellTxt.anchor.set(0.5, 0.5);
								sellTxt.x = sellBtn.x;
								sellTxt.y = sellBtn.y;
								itemBagInventoryUI.addChild(sellTxt);
								// Equip/Remove logic
								equipBtn.down = function () {
									// If not equipped, equip it
									if (!equippedItems[itemId]) {
										// Unequip all of this type
										for (var k in equippedItems) {
											if (itemData[k] && itemData[k].type === data.type) {
												equippedItems[k] = false;
												// Remove visual if present
												if (typeof hero.equippedVisuals !== "undefined" && hero.equippedVisuals[k]) {
													hero.removeChild(hero.equippedVisuals[k]);
													hero.equippedVisuals[k].destroy();
													hero.equippedVisuals[k] = null;
												}
											}
										}
										equippedItems[itemId] = true;
										// --- Show item visual on hero (front) --- 
										if (typeof hero.equippedVisuals === "undefined") hero.equippedVisuals = {};
										// Remove previous visual of this type if any
										if (hero.equippedVisuals[itemId]) {
											hero.removeChild(hero.equippedVisuals[itemId]);
											hero.equippedVisuals[itemId].destroy();
											hero.equippedVisuals[itemId] = null;
										}
										// Add new visual
										var equipVisual = LK.getAsset(itemId, {
											anchorX: 0.5,
											anchorY: 0.5,
											x: 0,
											y: 0,
											width: 320,
											height: 320
										});
										// Place in front of hero (higher z-order)
										hero.addChild(equipVisual);
										hero.equippedVisuals[itemId] = equipVisual;
										// --- Shield-1 barrier logic: set barrier to 100 on equip ---
										if (itemId === "shield-1") {
											heroShield1Barrier = 100;
											heroShield1BarrierMax = 100;
										}
										// Restore hero HP to new max if in battle or after refill
										var stats = getStatsForLevel(heroLevel, "hero");
										hero.currentHp = stats.hp;
										updateHeroStatsDisplay();
										// Refresh inventory UI
										if (itemBagWindow && itemBagWindow.parent) {
											itemBagWindow.parent.removeChild(itemBagWindow);
											itemBagWindow = null;
										}
										// Reopen window to refresh UI
										itemBagImg.down();
									} else {
										// Already equipped: Remove (Çıkart)
										equippedItems[itemId] = false;
										// Remove visual if present
										if (typeof hero.equippedVisuals !== "undefined" && hero.equippedVisuals[itemId]) {
											hero.removeChild(hero.equippedVisuals[itemId]);
											hero.equippedVisuals[itemId].destroy();
											hero.equippedVisuals[itemId] = null;
										}
										// Remove shield-1 barrier if unequipped
										if (itemId === "shield-1") {
											heroShield1Barrier = 0;
											heroShield1BarrierMax = 0;
										}
										// Restore hero stats
										var stats = getStatsForLevel(heroLevel, "hero");
										hero.currentHp = stats.hp;
										updateHeroStatsDisplay();
										// Refresh inventory UI
										if (itemBagWindow && itemBagWindow.parent) {
											itemBagWindow.parent.removeChild(itemBagWindow);
											itemBagWindow = null;
										}
										// Reopen window to refresh UI
										itemBagImg.down();
									}
								};
								// Sell logic
								sellBtn.down = function () {
									// Count how many of this item are in inventory
									var count = 0;
									for (var j = 0; j < inventory.length; j++) {
										if (inventory[j] === itemId) count++;
									}
									// If equipped and only one exists, prevent selling
									if (equippedItems[itemId] && count === 1) {
										// Optionally flash the sell button or show a message
										tween(sellBtn, {
											scaleX: 1.15,
											scaleY: 1.15,
											tint: 0xff4444
										}, {
											duration: 120,
											onFinish: function onFinish() {
												tween(sellBtn, {
													scaleX: 1,
													scaleY: 1,
													tint: 0x8B4513
												}, {
													duration: 120
												});
											}
										});
										return;
									}
									// Remove from inventory (only one instance)
									for (var j = 0; j < inventory.length; j++) {
										if (inventory[j] === itemId) {
											inventory.splice(j, 1);
											break;
										}
									}
									// If equipped and more remain, do not unequip; if not equipped, nothing to do
									// If equipped and more remain, keep equippedItems[itemId]=true
									// If equipped and now zero remain (should not happen), unequip
									var stillHas = false;
									for (var j = 0; j < inventory.length; j++) {
										if (inventory[j] === itemId) stillHas = true;
									}
									if (equippedItems[itemId] && !stillHas) {
										equippedItems[itemId] = false;
										// Restore hero stats
										var stats = getStatsForLevel(heroLevel, "hero");
										hero.currentHp = stats.hp;
										updateHeroStatsDisplay();
									}
									// Add gold
									goldAmount += data ? data.sellPrice : 1;
									updateGoldDisplay();
									// Refresh inventory UI
									if (itemBagWindow && itemBagWindow.parent) {
										itemBagWindow.parent.removeChild(itemBagWindow);
										itemBagWindow = null;
									}
									// Reopen window to refresh UI
									itemBagImg.down();
								};
							})(i);
						}
					}
					itemBagInventoryUI.x = 0;
					itemBagInventoryUI.y = 0;
					itemBagWindow.addChild(itemBagInventoryUI);
					// --- (Keep original drop animation for demo) ---
					var dropX = itemBagImg.x;
					var dropY = 0 - itemBagHeight; // Start above screen
					var item = LK.getAsset('gold', {
						anchorX: 0.5,
						anchorY: 0.5,
						x: dropX,
						y: dropY,
						width: 150,
						height: 102
					});
					game.addChild(item);
					// Animate drop to itemBag
					tween(item, {
						x: itemBagImg.x,
						y: itemBagImg.y
					}, {
						duration: 600,
						easing: tween.bounceOut,
						onFinish: function onFinish() {
							// Optionally: fade out and destroy after reaching itemBag
							tween(item, {
								alpha: 0
							}, {
								duration: 250,
								onFinish: function onFinish() {
									item.destroy();
								}
							});
						}
					});
				}
			});
		}
	});
};
// --- Helper Functions ---
function updateGoldDisplay() {
	goldTxt.setText(goldAmount);
}
function updateUpgradeDisplay() {
	// Show gold required to upgrade under the upgrade button
	if (typeof upgradeCostTxt !== "undefined") {
		var nextUpgradeCost = heroLevel * 5;
		upgradeCostTxt.setText("Gold required: " + nextUpgradeCost);
	}
}
// Update hero stats display
function updateHeroStatsDisplay() {
	var stats = getStatsForLevel(heroLevel, "hero");
	var hpDisplay = typeof hero.currentHp === "number" ? Math.max(0, Math.round(hero.currentHp)) + " / " + stats.hp : stats.hp;
	var barrierDisplay = "";
	if (equippedItems && equippedItems["shield-1"] && heroShield1Barrier > 0) {
		barrierDisplay = "  +" + heroShield1Barrier;
	}
	heroStatsTxt.setText("Hero\n" + "Level: " + heroLevel + "\n" + "Health: " + hpDisplay + barrierDisplay + "\n" + "Attack: " + stats.atk + "\n" + "Atk Spd: " + stats.atkSpd);
}
// Update enemy stats display
function updateEnemyStatsDisplay() {
	if (currentEnemy && currentEnemy.isAlive) {
		var enemyLevel = currentEnemy.level || heroLevel;
		var stats = getStatsForLevel(enemyLevel, "enemy");
		var hpDisplay = typeof currentEnemy.hp === "number" ? Math.max(0, Math.round(currentEnemy.hp)) + " / " + stats.hp : stats.hp;
		enemyStatsTxt.setText("Enemy\n" + "Level: " + enemyLevel + "\n" + "Health: " + hpDisplay + "\n" + "Attack: " + currentEnemy.attack + "\n" + "Atk Spd: " + currentEnemy.attackSpeed);
	} else {
		enemyStatsTxt.setText("Enemy\n-");
	}
}
// --- Game Logic ---
// Spawn enemy logic
// Enemy stat table for levels 1-10 (fixed stats)
var enemyStatsByLevel = [
// Level 1
{
	hp: 60,
	atk: 10,
	atkSpd: 2
},
// Level 2
{
	hp: 95,
	atk: 14,
	atkSpd: 3
},
// Level 3
{
	hp: 130,
	atk: 18,
	atkSpd: 4
},
// Level 4
{
	hp: 170,
	atk: 23,
	atkSpd: 4
},
// Level 5
{
	hp: 215,
	atk: 27,
	atkSpd: 5
},
// Level 6
{
	hp: 265,
	atk: 32,
	atkSpd: 6
},
// Level 7
{
	hp: 320,
	atk: 38,
	atkSpd: 6
},
// Level 8
{
	hp: 380,
	atk: 45,
	atkSpd: 7
},
// Level 9
{
	hp: 445,
	atk: 53,
	atkSpd: 8
},
// Level 10
{
	hp: 515,
	atk: 62,
	atkSpd: 9
}];
// --- Stat scaling logic for hero and enemy after level 10 ---
// Store hero stat growth per level (compounded) and enemy stat growth per level (linear from level 10 base)
var heroStatGrowth = {
	hp: [enemyStatsByLevel[9].hp],
	atk: [enemyStatsByLevel[9].atk],
	atkSpd: [enemyStatsByLevel[9].atkSpd]
};
var enemyStatGrowth = {
	hp: [enemyStatsByLevel[9].hp],
	atk: [enemyStatsByLevel[9].atk],
	atkSpd: [enemyStatsByLevel[9].atkSpd]
};
// Store enemy stat percent increases per level (for linear scaling)
var enemyStatPercents = {
	hp: [],
	atk: [],
	atkSpd: []
};
// Store hero stat percent increases per level (for compounded scaling)
var heroStatPercents = {
	hp: [],
	atk: [],
	atkSpd: []
};
// Helper to get random percent between 5% and 20%
function randomPercent() {
	return 0.05 + Math.random() * 0.15;
}
// Precompute stat growth up to a reasonable max level (e.g. 100)
function ensureStatGrowthUpTo(level) {
	var maxComputed = heroStatGrowth.hp.length + 9; // since index 0 is level 10
	for (var lvl = maxComputed + 1; lvl <= level; lvl++) {
		// HERO: compounded
		var prevHeroHp = heroStatGrowth.hp[heroStatGrowth.hp.length - 1];
		var prevHeroAtk = heroStatGrowth.atk[heroStatGrowth.atk.length - 1];
		var prevHeroAtkSpd = heroStatGrowth.atkSpd[heroStatGrowth.atkSpd.length - 1];
		var heroHpPct = randomPercent();
		var heroAtkPct = randomPercent();
		// After level 15, hero attack speed no longer increases
		var heroAtkSpdPct = lvl > 15 ? 0 : randomPercent();
		heroStatPercents.hp.push(heroHpPct);
		heroStatPercents.atk.push(heroAtkPct);
		heroStatPercents.atkSpd.push(heroAtkSpdPct);
		heroStatGrowth.hp.push(Math.round(prevHeroHp * (1 + heroHpPct)));
		heroStatGrowth.atk.push(Math.round(prevHeroAtk * (1 + heroAtkPct)));
		heroStatGrowth.atkSpd.push(Math.round(prevHeroAtkSpd * (1 + heroAtkSpdPct)));
		// ENEMY: linear from level 10 base
		var baseHp = enemyStatsByLevel[9].hp;
		var baseAtk = enemyStatsByLevel[9].atk;
		var baseAtkSpd = enemyStatsByLevel[9].atkSpd;
		var enemyHpPct = randomPercent();
		var enemyAtkPct = randomPercent();
		// After level 15, enemy attack speed no longer increases
		var enemyAtkSpdPct = lvl > 15 ? 0 : randomPercent();
		enemyStatPercents.hp.push(enemyHpPct);
		enemyStatPercents.atk.push(enemyAtkPct);
		enemyStatPercents.atkSpd.push(enemyAtkSpdPct);
		// For linear, sum all previous percent increases
		var totalHpPct = 0;
		var totalAtkPct = 0;
		var totalAtkSpdPct = 0;
		for (var i = 0; i < enemyStatPercents.hp.length; i++) totalHpPct += enemyStatPercents.hp[i];
		for (var i = 0; i < enemyStatPercents.atk.length; i++) totalAtkPct += enemyStatPercents.atk[i];
		for (var i = 0; i < enemyStatPercents.atkSpd.length; i++) totalAtkSpdPct += enemyStatPercents.atkSpd[i];
		// After level 20, enemy health increases by an additional 50% per level
		var extraHpMultiplier = 1;
		if (lvl > 20) {
			// For each level above 20, multiply by 1.5 for each extra level
			extraHpMultiplier = Math.pow(1.5, lvl - 20);
		}
		enemyStatGrowth.hp.push(Math.round(baseHp * (1 + totalHpPct) * extraHpMultiplier));
		enemyStatGrowth.atk.push(Math.round(baseAtk * (1 + totalAtkPct)));
		enemyStatGrowth.atkSpd.push(Math.round(baseAtkSpd * (1 + totalAtkSpdPct)));
	}
}
// Returns stats for a given level and type ('hero' or 'enemy')
function getStatsForLevel(level, type) {
	if (level <= 10) {
		var idx = Math.max(0, Math.min(enemyStatsByLevel.length - 1, level - 1));
		var stats = enemyStatsByLevel[idx];
		return {
			hp: stats.hp,
			atk: stats.atk,
			atkSpd: stats.atkSpd
		};
	}
	ensureStatGrowthUpTo(level);
	var idx = level - 10;
	if (type === "hero") {
		// Base stats
		var baseHp = heroStatGrowth.hp[idx];
		var baseAtk = heroStatGrowth.atk[idx];
		var baseAtkSpd = heroStatGrowth.atkSpd[idx];
		// Apply shield-1 effects if equipped
		if (equippedItems && equippedItems["shield-1"]) {
			baseHp += itemData["shield-1"].bonusHp;
			baseAtkSpd = Math.max(1, baseAtkSpd - itemData["shield-1"].atkSpdPenalty);
		}
		return {
			hp: baseHp,
			atk: baseAtk,
			atkSpd: baseAtkSpd
		};
	} else {
		return {
			hp: enemyStatGrowth.hp[idx],
			atk: enemyStatGrowth.atk[idx],
			atkSpd: enemyStatGrowth.atkSpd[idx]
		};
	}
}
// For backward compatibility, keep getEnemyStatsForLevel for hero stats (used in refill, etc)
function getEnemyStatsForLevel(level) {
	return getStatsForLevel(level, "hero");
}
function spawnEnemy() {
	if (currentEnemy && currentEnemy.isAlive) return; // Only one at a time
	if (hero.healthRefilling) return; // Don't allow spawn while refilling
	var enemy = new Enemy();
	// Place enemy on the far right, vertically aligned with hero
	enemy.x = 2048 - 200; // 200px from the right edge, matching hero's 200px from left
	enemy.y = hero.y;
	// Determine enemy level: always one of heroLevel-1, heroLevel, heroLevel+1, or heroLevel+2
	var possibleLevels = [Math.max(1, heroLevel - 1), heroLevel, heroLevel + 1, heroLevel + 2];
	// Remove duplicates and clamp to at least 1
	var uniqueLevels = [];
	for (var i = 0; i < possibleLevels.length; i++) {
		var lvl = Math.max(1, possibleLevels[i]);
		if (uniqueLevels.indexOf(lvl) === -1) uniqueLevels.push(lvl);
	}
	// Randomly pick one
	var enemyLevel = uniqueLevels[Math.floor(Math.random() * uniqueLevels.length)];
	// Clamp enemyLevel to valid range for stats table
	enemyLevel = Math.max(1, Math.min(enemyStatsByLevel.length + heroStatGrowth.hp.length, enemyLevel));
	// Get stats for this level (enemy uses linear scaling after level 10)
	var stats = getStatsForLevel(enemyLevel, "enemy");
	enemy.hp = stats.hp;
	enemy.attack = stats.atk;
	enemy.attackSpeed = stats.atkSpd;
	enemy.isAlive = true;
	enemy.spawnAnim();
	game.addChild(enemy);
	currentEnemy = enemy;
	// Store the enemy's level for display
	currentEnemy.level = enemyLevel;
	updateEnemyStatsDisplay();
	// --- Start auto-fight timers ---
	if (typeof heroAutoAttackTimer !== "undefined" && heroAutoAttackTimer) {
		LK.clearInterval(heroAutoAttackTimer);
		heroAutoAttackTimer = null;
	}
	if (typeof enemyAutoAttackTimer !== "undefined" && enemyAutoAttackTimer) {
		LK.clearInterval(enemyAutoAttackTimer);
		enemyAutoAttackTimer = null;
	}
	// Get hero stats for this level (hero uses compounded scaling after level 10)
	var heroStats = getStatsForLevel(heroLevel, "hero");
	hero.currentHp = heroStats.hp;
	hero.attack = heroStats.atk;
	hero.attackSpeed = heroStats.atkSpd;
	// Hero attacks enemy
	heroAutoAttackTimer = LK.setInterval(function () {
		if (!currentEnemy || !currentEnemy.isAlive) {
			LK.clearInterval(heroAutoAttackTimer);
			heroAutoAttackTimer = null;
			return;
		}
		// If one-shot mode, instantly defeat enemy
		if (heroOneShotEnemies) {
			currentEnemy.hp = 0;
		} else {
			currentEnemy.hp -= hero.attack;
		}
		// Flash enemy
		if (currentEnemy) {
			tween(currentEnemy, {
				tint: 0xffffff
			}, {
				duration: 60,
				onFinish: function onFinish() {
					if (currentEnemy) {
						tween(currentEnemy, {
							tint: 0x2a6bde
						}, {
							duration: 60
						});
					}
				}
			});
		}
		updateEnemyStatsDisplay();
		if (currentEnemy.hp <= 0) {
			defeatEnemy();
			LK.clearInterval(heroAutoAttackTimer);
			heroAutoAttackTimer = null;
			LK.clearInterval(enemyAutoAttackTimer);
			enemyAutoAttackTimer = null;
		}
	}, 1000 / hero.attackSpeed);
	// Enemy attacks hero
	enemyAutoAttackTimer = LK.setInterval(function () {
		if (!currentEnemy || !currentEnemy.isAlive) {
			LK.clearInterval(enemyAutoAttackTimer);
			enemyAutoAttackTimer = null;
			return;
		}
		if (typeof hero.currentHp !== "number") {
			// Defensive: ensure hero.currentHp is set
			var hStats = getEnemyStatsForLevel(heroLevel);
			hero.currentHp = hStats.hp;
		}
		if (!heroIsImmortal) {
			// --- Shield-1 barrier logic: block damage with barrier first ---
			if (equippedItems && equippedItems["shield-1"] && heroShield1Barrier > 0) {
				var dmg = currentEnemy.attack;
				if (heroShield1Barrier >= dmg) {
					heroShield1Barrier -= dmg;
					dmg = 0;
				} else {
					dmg -= heroShield1Barrier;
					heroShield1Barrier = 0;
				}
				if (dmg > 0) {
					hero.currentHp -= dmg;
				}
			} else {
				hero.currentHp -= currentEnemy.attack;
			}
			// Flash hero
			tween(hero, {
				tint: 0xffffff
			}, {
				duration: 60,
				onFinish: function onFinish() {
					tween(hero, {
						tint: 0xd83318
					}, {
						duration: 60
					});
				}
			});
			updateHeroStatsDisplay();
			if (hero.currentHp <= 0) {
				// Hero defeated, stop fighting
				hero.currentHp = 0;
				updateHeroStatsDisplay();
				// Optionally, you can add defeat logic here (e.g. show game over)
				LK.clearInterval(heroAutoAttackTimer);
				heroAutoAttackTimer = null;
				LK.clearInterval(enemyAutoAttackTimer);
				enemyAutoAttackTimer = null;
				// Start health refill (handled in update loop)
				hero.healthRefilling = false; // Will be set to true in update loop
			}
		} else {
			// If immortal, keep HP at max and flash gold
			var stats = getStatsForLevel(heroLevel, "hero");
			hero.currentHp = stats.hp;
			updateHeroStatsDisplay();
			tween(hero, {
				tint: 0xFFD700
			}, {
				duration: 60,
				onFinish: function onFinish() {
					tween(hero, {
						tint: 0xffffff
					}, {
						duration: 60
					});
				}
			});
		}
	}, 1000 / currentEnemy.attackSpeed);
}
// Defeat enemy logic
function defeatEnemy() {
	if (!currentEnemy || !currentEnemy.isAlive) return;
	currentEnemy.isAlive = false;
	// Stop auto-fight timers
	if (typeof heroAutoAttackTimer !== "undefined" && heroAutoAttackTimer) {
		LK.clearInterval(heroAutoAttackTimer);
		heroAutoAttackTimer = null;
	}
	if (typeof enemyAutoAttackTimer !== "undefined" && enemyAutoAttackTimer) {
		LK.clearInterval(enemyAutoAttackTimer);
		enemyAutoAttackTimer = null;
	}
	currentEnemy.defeatAnim(function () {
		if (currentEnemy) {
			// --- Shield-1 drop logic ---
			// Only drop for enemy levels 1-10
			if (typeof currentEnemy.level !== "undefined" && currentEnemy.level >= 1 && currentEnemy.level <= 10) {
				// 5% per level, capped at 50% for level 10
				var shieldDropChance = currentEnemy.level * 0.05;
				if (Math.random() < shieldDropChance) {
					// Drop shield-1 at enemy's position
					var shieldAsset = LK.getAsset('shield-1', {
						anchorX: 0.5,
						anchorY: 0.5,
						x: currentEnemy.x,
						y: currentEnemy.y
					});
					game.addChild(shieldAsset);
					// Animate drop: move to itemBag position and shrink/fade out
					// Get itemBag position in game coordinates
					var itemBagGlobal = LK.gui.bottom.toGlobal({
						x: itemBagImg.x,
						y: itemBagImg.y
					});
					var itemBagGamePos = game.toLocal(itemBagGlobal);
					tween(shieldAsset, {
						x: itemBagGamePos.x,
						y: itemBagGamePos.y,
						scaleX: 0.3,
						scaleY: 0.3,
						alpha: 0.2
					}, {
						duration: 700,
						easing: tween.cubicIn,
						onFinish: function onFinish() {
							shieldAsset.destroy();
							// Add to inventory and auto-equip if not already equipped
							if (!equippedItems["shield-1"]) {
								inventory.push("shield-1");
								equippedItems["shield-1"] = true;
								// Set shield-1 barrier to max
								heroShield1Barrier = 100;
								heroShield1BarrierMax = 100;
								// Restore hero HP to new max if in battle or after refill
								var stats = getStatsForLevel(heroLevel, "hero");
								hero.currentHp = stats.hp;
								updateHeroStatsDisplay();
							}
						}
					});
				}
			}
			currentEnemy.destroy();
			currentEnemy = null;
			updateEnemyStatsDisplay();
			// If shield-1 is equipped, restore hero HP to new max after enemy defeat
			if (equippedItems["shield-1"]) {
				heroShield1Barrier = 100;
				heroShield1BarrierMax = 100;
				var stats = getStatsForLevel(heroLevel, "hero");
				hero.currentHp = stats.hp;
				updateHeroStatsDisplay();
			}
		}
		// --- spawnBtn rotation logic on enemy defeat ---
		// If hero HP is full, rotate 45deg right, else 90deg left
		var heroStats = getStatsForLevel(heroLevel, "hero");
		if (typeof hero.currentHp === "number" && hero.currentHp >= heroStats.hp) {
			// Full health: rotate 45deg right
			spawnBtnRotationQueue.push({
				angle: Math.PI / 4
			});
		} else {
			// Not full: rotate 90deg left
			spawnBtnRotationQueue.push({
				angle: -Math.PI / 2,
				onFinish: function onFinish() {
					// After 90deg left, if hero HP is still not full and no enemy, resume right rotation
					if ((!currentEnemy || !currentEnemy.isAlive) && typeof hero.currentHp === "number" && hero.currentHp < getStatsForLevel(heroLevel, "hero").hp) {
						if (!spawnBtn._rotatingWhileNotFull) {
							spawnBtn._rotatingWhileNotFull = true;
							// Start continuous right rotation (1 full spin per 1.2s)
							var _rotateRightLoop = function rotateRightLoop() {
								if (!spawnBtn._rotatingWhileNotFull) return;
								var startRot = spawnBtn.rotation;
								var endRot = startRot + Math.PI * 2;
								tween(spawnBtn, {
									rotation: endRot
								}, {
									duration: 1200,
									easing: tween.linear,
									onFinish: function onFinish() {
										if (spawnBtn._rotatingWhileNotFull && (!currentEnemy || !currentEnemy.isAlive)) {
											_rotateRightLoop();
										}
									}
								});
							};
							tween.stop(spawnBtn, {
								rotation: true
							});
							_rotateRightLoop();
						}
					}
				}
			});
		}
		processSpawnBtnRotationQueue();
		// Start hero health refill after any battle (at same refill speed as on defeat)
		// If hero died (currentHp <= 0), double the refill duration
		if (typeof hero.currentHp === "number" && hero.currentHp < getStatsForLevel(heroLevel, "hero").hp && !hero.healthRefilling) {
			hero.healthRefilling = true;
			hero.refillStartTime = Date.now();
			var stats = getStatsForLevel(heroLevel, "hero");
			hero.refillFromHp = hero.currentHp;
			hero.refillToHp = stats.hp;
			// Set refill duration to 1/5th speed (5x slower), or 1/10th (10x slower) if hero died
			var baseDuration = 1000; // original duration
			if (hero.currentHp <= 0) {
				hero.refillDuration = baseDuration * 10; // 10x slower if died
			} else {
				hero.refillDuration = baseDuration * 5; // 5x slower otherwise
			}
		}
	});
	// --- Gold drop amount table per level ---
	var goldDropByLevel = [{
		min: 1,
		max: 5
	},
	// Level 1
	{
		min: 3,
		max: 8
	},
	// Level 2
	{
		min: 5,
		max: 12
	},
	// Level 3
	{
		min: 8,
		max: 16
	},
	// Level 4
	{
		min: 12,
		max: 20
	},
	// Level 5
	{
		min: 15,
		max: 25
	},
	// Level 6
	{
		min: 20,
		max: 32
	},
	// Level 7
	{
		min: 25,
		max: 40
	},
	// Level 8
	{
		min: 30,
		max: 48
	},
	// Level 9
	{
		min: 35,
		max: 60
	} // Level 10
	];
	// Determine gold drop amount for this level
	var goldDropStats = goldDropByLevel[Math.max(0, Math.min(heroLevel - 1, goldDropByLevel.length - 1))];
	var goldDropAmount = Math.floor(Math.random() * (goldDropStats.max - goldDropStats.min + 1)) + goldDropStats.min;
	// Drop gold at the far right (where enemy was)
	// Animate and auto-collect gold after enemy defeat
	// Calculate the gold display position in game coordinates (top right, where goldTxt is)
	var goldDisplayGlobal = LK.gui.topRight.toGlobal({
		x: goldTxt.x,
		y: goldTxt.y
	});
	var goldDisplayGamePos = game.toLocal(goldDisplayGlobal);
	for (var i = 0; i < goldDropAmount; i++) {
		var gold = new Gold();
		gold.x = 2048 - 200;
		gold.y = hero.y;
		gold.scaleX = 1;
		gold.scaleY = 1;
		gold.alpha = 1;
		game.addChild(gold);
		golds.push(gold);
		// Drop to random y near enemy
		var dropY = gold.y + (Math.random() * 120 - 60);
		(function (goldObj, idx) {
			goldObj.dropAnim(goldObj.x, dropY, function () {
				// Stagger collection for nice effect
				LK.setTimeout(function () {
					// Animate to gold display and collect
					goldObj.collectAnim(goldDisplayGamePos.x, goldDisplayGamePos.y, function () {
						goldAmount += 1;
						updateGoldDisplay();
						goldObj.destroy();
					});
				}, 80 * idx);
			});
		})(gold, i);
	}
	// --- Shield-1 drop logic ---
	// Only drop for enemy levels 1-10
	if (typeof enemyLevel !== "undefined" && enemyLevel >= 1 && enemyLevel <= 10) {
		// 5% per level, capped at 50% for level 10
		var shieldDropChance = enemyLevel * 0.05;
		if (Math.random() < shieldDropChance) {
			// Drop shield-1 at enemy's position
			var shieldAsset = LK.getAsset('shield-1', {
				anchorX: 0.5,
				anchorY: 0.5,
				x: 2048 - 200,
				y: hero.y
			});
			game.addChild(shieldAsset);
			// Animate drop (fall down a bit, then fade out)
			var dropTargetY = shieldAsset.y + 180 + (Math.random() * 40 - 20);
			tween(shieldAsset, {
				y: dropTargetY
			}, {
				duration: 400,
				easing: tween.bounceOut,
				onFinish: function onFinish() {
					// After a short delay, fade out and destroy
					LK.setTimeout(function () {
						tween(shieldAsset, {
							alpha: 0
						}, {
							duration: 350,
							onFinish: function onFinish() {
								shieldAsset.destroy();
							}
						});
					}, 900);
				}
			});
		}
	}
}
// --- Shield-1 drop logic ---
// Only drop for enemy levels 1-10
if (typeof enemyLevel !== "undefined" && enemyLevel >= 1 && enemyLevel <= 10) {
	// 5% per level, capped at 50% for level 10
	var shieldDropChance = enemyLevel * 0.05;
	if (Math.random() < shieldDropChance) {
		// Drop shield-1 at enemy's position
		var shieldAsset = LK.getAsset('shield-1', {
			anchorX: 0.5,
			anchorY: 0.5,
			x: 2048 - 200,
			y: hero.y
		});
		game.addChild(shieldAsset);
		// Animate drop (fall down a bit, then fade out)
		var dropTargetY = shieldAsset.y + 180 + (Math.random() * 40 - 20);
		tween(shieldAsset, {
			y: dropTargetY
		}, {
			duration: 400,
			easing: tween.bounceOut,
			onFinish: function onFinish() {
				// After a short delay, fade out and destroy
				LK.setTimeout(function () {
					tween(shieldAsset, {
						alpha: 0
					}, {
						duration: 350,
						onFinish: function onFinish() {
							shieldAsset.destroy();
						}
					});
				}, 900);
			}
		});
	}
}
// Collect gold logic
function collectGold(gold) {
	// Animate to gold display
	var guiGoldPos = LK.gui.topRight.toLocal(gold.toGlobal({
		x: 0,
		y: 0
	}));
	goldAmount += 1;
	updateGoldDisplay();
	gold.collectAnim(guiGoldPos.x, guiGoldPos.y, function () {
		gold.destroy();
	});
}
// Upgrade logic
function upgradeHero() {
	var upgradeCost = heroLevel * 5;
	if (goldAmount < upgradeCost) {
		// Flash gold text red
		tween(goldTxt, {
			tint: 0xff4444
		}, {
			duration: 120,
			onFinish: function onFinish() {
				tween(goldTxt, {
					tint: 0xFFE066
				}, {
					duration: 120
				});
			}
		});
		return;
	}
	goldAmount -= upgradeCost;
	heroLevel += 1;
	hero.level = heroLevel;
	// Refill hero health to full on level up
	var stats = getStatsForLevel(heroLevel, "hero");
	hero.currentHp = stats.hp;
	hero.healthRefilling = false;
	updateGoldDisplay();
	updateUpgradeDisplay();
	updateHeroStatsDisplay();
	updateEnemyStatsDisplay();
	hero.flashUpgrade();
}
// --- Event Handlers ---
// Spawn button tap
// --- spawnBtn rotation queue state ---
var spawnBtnRotationQueue = [];
var spawnBtnIsRotating = false;
function processSpawnBtnRotationQueue() {
	if (spawnBtnIsRotating || spawnBtnRotationQueue.length === 0) return;
	spawnBtnIsRotating = true;
	var next = spawnBtnRotationQueue.shift();
	var targetRotation = spawnBtn.rotation + next.angle;
	tween(spawnBtn, {
		rotation: targetRotation
	}, {
		duration: 180,
		easing: tween.cubicInOut,
		onFinish: function onFinish() {
			spawnBtn.rotation = targetRotation;
			spawnBtnIsRotating = false;
			if (typeof next.onFinish === "function") next.onFinish();
			// Process next in queue
			processSpawnBtnRotationQueue();
		}
	});
}
spawnBtn.down = function (x, y, obj) {
	// Animate shrink
	tween.stop(spawnBtn, {
		scaleX: true,
		scaleY: true
	});
	tween(spawnBtn, {
		scaleX: 0.9,
		scaleY: 0.9
	}, {
		duration: 100,
		easing: tween.cubicIn,
		onFinish: function onFinish() {
			tween(spawnBtn, {
				scaleX: 1,
				scaleY: 1
			}, {
				duration: 100,
				easing: tween.cubicOut,
				onFinish: function onFinish() {
					// After animation, trigger action
					// Queue 45deg right rotation
					spawnBtnRotationQueue.push({
						angle: Math.PI / 4
					});
					processSpawnBtnRotationQueue();
					spawnEnemy();
				}
			});
		}
	});
};
// Enemy tap (defeat)
function onEnemyDown(x, y, obj) {
	if (!currentEnemy || !currentEnemy.isAlive) return;
	currentEnemy.hp -= 1;
	// Flash enemy
	tween(currentEnemy, {
		tint: 0xffffff
	}, {
		duration: 60,
		onFinish: function onFinish() {
			tween(currentEnemy, {
				tint: 0x2a6bde
			}, {
				duration: 60
			});
		}
	});
	if (currentEnemy.hp <= 0) {
		defeatEnemy();
	}
}
// Gold tap (collect)
function onGoldDown(x, y, obj) {
	for (var i = golds.length - 1; i >= 0; i--) {
		var gold = golds[i];
		if (gold && gold.containsPoint && gold.containsPoint({
			x: x,
			y: y
		})) {
			collectGold(gold);
			golds.splice(i, 1);
			break;
		}
	}
}
// Upgrade button tap
upgradeBtn.down = function (x, y, obj) {
	// Animate shrink
	tween.stop(upgradeBtn, {
		scaleX: true,
		scaleY: true
	});
	tween(upgradeBtn, {
		scaleX: 0.9,
		scaleY: 0.9
	}, {
		duration: 100,
		easing: tween.cubicIn,
		onFinish: function onFinish() {
			tween(upgradeBtn, {
				scaleX: 1,
				scaleY: 1
			}, {
				duration: 100,
				easing: tween.cubicOut,
				onFinish: function onFinish() {
					// After animation, trigger action
					upgradeHero();
				}
			});
		}
	});
};
// Work button tap
workBtn.down = function (x, y, obj) {
	if (!workBtnActive) return;
	// Prevent workBtn press if hero HP is not full
	if (typeof hero.currentHp === "number" && hero.currentHp < getStatsForLevel(heroLevel, "hero").hp) return;
	// Animate shrink
	tween.stop(workBtn, {
		scaleX: true,
		scaleY: true
	});
	tween(workBtn, {
		scaleX: 0.9,
		scaleY: 0.9
	}, {
		duration: 100,
		easing: tween.cubicIn,
		onFinish: function onFinish() {
			tween(workBtn, {
				scaleX: 1,
				scaleY: 1
			}, {
				duration: 100,
				easing: tween.cubicOut,
				onFinish: function onFinish() {
					// After animation, trigger action
					// Calculate duration: let duration = Math.max(10000, ((level ** 1.2) * 60000) / (attackSpeed * attack));
					var stats = getStatsForLevel(heroLevel, "hero");
					var denominator = stats.atkSpd * stats.atk;
					var duration = 10; // Defensive minimum in seconds
					if (Number.isFinite(denominator) && denominator > 0) {
						duration = Math.max(10000, Math.pow(heroLevel, 1.2) * 60000 / denominator) / 1000; // ms to seconds
					}
					// Multiply duration by heroLevel (time level)
					duration = duration * heroLevel;
					workBtnActive = false;
					workBtnDuration = duration;
					workBtnTimeLeft = duration;
					setSpawnBtnEnabled(false);
					showWorkBtnCountdown(workBtnTimeLeft);
					// Start timer to update countdown
					if (workBtnTimer) {
						LK.clearInterval(workBtnTimer);
						workBtnTimer = null;
					}
					// Start rotation tween for workBtn at 20% of previous speed
					tween.stop(workBtn, {
						rotation: true
					});
					workBtn.rotation = 0;
					// Calculate totalRotations for 20% speed (i.e., 1/5th the previous speed, so 1/5th the number of spins)
					var baseTotalRotations = 2 + Math.floor(workBtnDuration);
					var slowTotalRotations = Math.max(1, Math.round(baseTotalRotations * 0.2)); // at least 1 full spin
					tween(workBtn, {
						rotation: Math.PI * 2 * slowTotalRotations
					}, {
						duration: workBtnDuration * 1000,
						easing: tween.linear,
						onFinish: function onFinish() {
							workBtn.rotation = 0; // reset rotation to 0 for next use
						}
					});
					workBtnTimer = LK.setInterval(function () {
						workBtnTimeLeft -= 0.1;
						if (workBtnTimeLeft < 0) workBtnTimeLeft = 0;
						showWorkBtnCountdown(workBtnTimeLeft);
						if (workBtnTimeLeft <= 0) {
							// Timer done
							LK.clearInterval(workBtnTimer);
							workBtnTimer = null;
							workBtnActive = true;
							setSpawnBtnEnabled(true);
							hideWorkBtnCountdown();
							// Stop rotation tween and reset rotation
							tween.stop(workBtn, {
								rotation: true
							});
							workBtn.rotation = 0;
							// Drop gold: (main character's level * attack speed + attack / 2) / random(1-5)
							var stats = getStatsForLevel(heroLevel, "hero");
							var divisor = Math.floor(Math.random() * 5) + 1;
							var goldVal = heroLevel * stats.atkSpd + stats.atk / 2;
							var goldDrop = Math.max(1, Math.floor(goldVal / divisor));
							// Calculate gold display position in game coordinates (top right, where goldTxt is)
							var goldDisplayGlobal = LK.gui.topRight.toGlobal({
								x: goldTxt.x,
								y: goldTxt.y
							});
							var goldDisplayGamePos = game.toLocal(goldDisplayGlobal);
							// Spawn gold under hero and animate to gold display
							for (var i = 0; i < goldDrop; i++) {
								var gold = new Gold();
								gold.x = hero.x;
								gold.y = hero.y + hero.height / 2 + 60 + (Math.random() * 40 - 20);
								gold.scaleX = 1;
								gold.scaleY = 1;
								gold.alpha = 1;
								game.addChild(gold);
								golds.push(gold);
								// Animate to gold display
								(function (goldObj, idx) {
									// Retreat: move down a bit, then animate to gold display
									var retreatY = goldObj.y + 80 + (Math.random() * 30 - 15);
									goldObj.dropAnim(goldObj.x, retreatY, function () {
										LK.setTimeout(function () {
											goldObj.collectAnim(goldDisplayGamePos.x, goldDisplayGamePos.y, function () {
												goldAmount += 1;
												updateGoldDisplay();
												goldObj.destroy();
											});
										}, 80 * idx);
									});
								})(gold, i);
							}
						}
					}, 100);
				}
			});
		}
	});
};
// --- Attach event handlers to game ---
game.down = function (x, y, obj) {
	// Check if tap is on enemy
	if (currentEnemy && currentEnemy.isAlive && currentEnemy.containsPoint && currentEnemy.containsPoint({
		x: x,
		y: y
	})) {
		onEnemyDown(x, y, obj);
		return;
	}
	// Check if tap is on any gold
	for (var i = golds.length - 1; i >= 0; i--) {
		var gold = golds[i];
		if (gold && gold.containsPoint && gold.containsPoint({
			x: x,
			y: y
		})) {
			collectGold(gold);
			golds.splice(i, 1);
			return;
		}
	}
	// (Buttons handled by their own .down)
};
// --- Game update loop ---
game.update = function () {
	// Remove golds that are invisible
	for (var i = golds.length - 1; i >= 0; i--) {
		var gold = golds[i];
		if (gold.alpha <= 0.01) {
			gold.destroy();
			golds.splice(i, 1);
		}
	}
	// --- Hero health refill logic ---
	if (typeof hero.healthRefilling === "undefined") hero.healthRefilling = false;
	if (typeof hero.refillStartTime === "undefined") hero.refillStartTime = 0;
	if (typeof hero.refillDuration === "undefined") hero.refillDuration = 5000; // Default, will be set below
	if (typeof hero.refillFromHp === "undefined") hero.refillFromHp = 0;
	if (typeof hero.refillToHp === "undefined") hero.refillToHp = 0;
	if (typeof hero.currentHp === "number" && hero.currentHp <= 0 && !hero.healthRefilling) {
		// Start refill
		hero.healthRefilling = true;
		hero.refillStartTime = Date.now();
		var stats = getStatsForLevel(heroLevel, "hero");
		hero.refillFromHp = 0;
		hero.refillToHp = stats.hp;
		// Set refill duration to 1/5th speed (5x slower)
		hero.refillDuration = 5000; // fallback
		var baseDuration = 1000; // original duration
		if (hero.currentHp <= 0) {
			hero.refillDuration = baseDuration * 10; // 10x slower if died
		} else {
			hero.refillDuration = baseDuration * 5; // 5x slower otherwise
		}
		// Destroy enemy immediately (so a new one can only be summoned after refill)
		if (currentEnemy && currentEnemy.isAlive) {
			currentEnemy.isAlive = false;
			currentEnemy.defeatAnim(function () {
				if (currentEnemy) {
					currentEnemy.destroy();
					currentEnemy = null;
					updateEnemyStatsDisplay();
				}
			});
		}
	}
	if (hero.healthRefilling) {
		var now = Date.now();
		var elapsed = now - hero.refillStartTime;
		var t = Math.min(1, elapsed / hero.refillDuration);
		var stats = getStatsForLevel(heroLevel, "hero");
		hero.currentHp = Math.round(hero.refillFromHp + (hero.refillToHp - hero.refillFromHp) * t);
		if (t >= 1) {
			hero.currentHp = stats.hp;
			hero.healthRefilling = false;
			// After refill, if shield-1 is equipped, restore barrier to max
			if (equippedItems && equippedItems["shield-1"]) {
				heroShield1Barrier = 100;
				heroShield1BarrierMax = 100;
			}
		}
	}
	// Prevent spawnBtn and workBtn from being pressed unless hero HP is full
	if (typeof hero.currentHp === "number" && hero.currentHp < getStatsForLevel(heroLevel, "hero").hp) {
		setSpawnBtnEnabled(false);
		// Disable workBtn and make it semi-transparent
		workBtn.alpha = 0.5;
		workBtn.interactive = false;
		workBtn.buttonMode = false;
		// --- Rotate spawnBtn to the right while hero HP is not full, but only if NO enemy is alive ---
		if (!spawnBtn._rotatingWhileNotFull && (!currentEnemy || !currentEnemy.isAlive)) {
			var _rotateRightLoop = function rotateRightLoop() {
				if (!spawnBtn._rotatingWhileNotFull) return;
				var startRot = spawnBtn.rotation;
				var endRot = startRot + Math.PI * 2;
				tween(spawnBtn, {
					rotation: endRot
				}, {
					duration: 1200,
					easing: tween.linear,
					onFinish: function onFinish() {
						// Continue loop if still not full and still no enemy
						if (spawnBtn._rotatingWhileNotFull && (!currentEnemy || !currentEnemy.isAlive)) {
							_rotateRightLoop();
						}
					}
				});
			};
			tween.stop(spawnBtn, {
				rotation: true
			});
			// Start continuous right rotation (1 full spin per 1.2s)
			spawnBtn._rotatingWhileNotFull = true;
			_rotateRightLoop();
		}
	} else if (!hero.healthRefilling && workBtnActive) {
		setSpawnBtnEnabled(true);
		// Enable workBtn and restore full opacity
		workBtn.alpha = 1;
		workBtn.interactive = true;
		workBtn.buttonMode = true;
		// If hero HP is full, remove all effects and restore color
		tween.stop(hero, {
			tint: true,
			alpha: true,
			scaleX: true,
			scaleY: true
		});
		hero.tint = 0xffffff;
		hero.alpha = 1;
		hero.scaleX = 1;
		hero.scaleY = 1;
		// --- Stop spawnBtn rotation and reset to original position, with 45deg right spin if HP just became full and no enemy is alive ---
		if (spawnBtn._rotatingWhileNotFull) {
			spawnBtn._rotatingWhileNotFull = false;
			tween.stop(spawnBtn, {
				rotation: true
			});
			// If hero HP just became full and no enemy is alive, rotate 45deg right and then reset to 0
			if ((!currentEnemy || !currentEnemy.isAlive) && typeof hero.currentHp === "number" && hero.currentHp === getStatsForLevel(heroLevel, "hero").hp) {
				// Animate 45deg right, then reset to 0
				tween(spawnBtn, {
					rotation: spawnBtn.rotation + Math.PI / 4
				}, {
					duration: 180,
					easing: tween.cubicOut,
					onFinish: function onFinish() {
						tween(spawnBtn, {
							rotation: 0
						}, {
							duration: 200,
							easing: tween.cubicOut
						});
					}
				});
			} else {
				// Animate back to original rotation (0)
				tween(spawnBtn, {
					rotation: 0
				}, {
					duration: 200,
					easing: tween.cubicOut
				});
			}
		}
	}
	// Keep hero slightly lower than vertical center
	hero.y = 2732 / 2 + 200;
	// Keep enemy vertically centered and at far right if alive
	if (currentEnemy && currentEnemy.isAlive) {
		currentEnemy.x = 2048 - 200;
		currentEnemy.y = hero.y + 100; // Move enemy a little lower
	}
	updateHeroStatsDisplay();
	updateEnemyStatsDisplay();
	// Keep workBtnCountdownTxt positioned under workBtn if visible
	if (workBtnCountdownTxt && workBtnCountdownTxt.visible) {
		workBtnCountdownTxt.x = workBtn.x;
		workBtnCountdownTxt.y = workBtn.y + workBtn.height / 2 + 8;
	}
};
// --- Initial UI state ---
updateGoldDisplay();
updateUpgradeDisplay();
updateHeroStatsDisplay();
updateEnemyStatsDisplay();

===================================================================
--- original.js
+++ change.js
@@ -667,17 +667,49 @@
 									}
 								};
 								// Sell logic
 								sellBtn.down = function () {
-									// Remove from inventory
+									// Count how many of this item are in inventory
+									var count = 0;
 									for (var j = 0; j < inventory.length; j++) {
+										if (inventory[j] === itemId) count++;
+									}
+									// If equipped and only one exists, prevent selling
+									if (equippedItems[itemId] && count === 1) {
+										// Optionally flash the sell button or show a message
+										tween(sellBtn, {
+											scaleX: 1.15,
+											scaleY: 1.15,
+											tint: 0xff4444
+										}, {
+											duration: 120,
+											onFinish: function onFinish() {
+												tween(sellBtn, {
+													scaleX: 1,
+													scaleY: 1,
+													tint: 0x8B4513
+												}, {
+													duration: 120
+												});
+											}
+										});
+										return;
+									}
+									// Remove from inventory (only one instance)
+									for (var j = 0; j < inventory.length; j++) {
 										if (inventory[j] === itemId) {
 											inventory.splice(j, 1);
 											break;
 										}
 									}
-									// If equipped, unequip
-									if (equippedItems[itemId]) {
+									// If equipped and more remain, do not unequip; if not equipped, nothing to do
+									// If equipped and more remain, keep equippedItems[itemId]=true
+									// If equipped and now zero remain (should not happen), unequip
+									var stillHas = false;
+									for (var j = 0; j < inventory.length; j++) {
+										if (inventory[j] === itemId) stillHas = true;
+									}
+									if (equippedItems[itemId] && !stillHas) {
 										equippedItems[itemId] = false;
 										// Restore hero stats
 										var stats = getStatsForLevel(heroLevel, "hero");
 										hero.currentHp = stats.hp;