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

/**** 
* Classes
****/ 
// Arrow class for castle arrow shooting
var Arrow = Container.expand(function () {
	var self = Container.call(this);
	// Increase arrow speed for longer distance
	self.speed = 40; // px per frame (was 32)
	self.damage = 2 + Math.floor(Math.random() * 3); // 2-4 damage
	self.target = null;
	self.team = null;
	self.destroyed = false;
	self.asset = null;
	self.lastX = 0;
	self.lastY = 0;
	// Initialize arrow
	self.init = function (x, y, target, damage, team) {
		self.x = x;
		self.y = y;
		self.target = target;
		// Arrow damage is randomized 2-4, ignore passed damage param for castle arrows
		self.damage = 2 + Math.floor(Math.random() * 3);
		self.team = team;
		// Remove previous asset if any
		if (self.asset) {
			self.removeChild(self.asset);
		}
		// Use a visible arrow using a rectangle shape since centerCircle is removed
		self.asset = self.attachAsset('arrow_shape', {
			anchorX: 0.5,
			anchorY: 0.5,
			scaleX: 1.2,
			scaleY: 0.3,
			tint: team === 'player' ? 0x00aaff : 0xffaa00 // more visible blue/orange
		});
	};
	// Update arrow position and check for hit
	self.update = function () {
		self.lastX = self.x;
		self.lastY = self.y;
		if (!self.target || self.target.destroyed || self.destroyed) {
			self.destroyed = true;
			self.destroy();
			return;
		}
		// Move towards target
		var dx = self.target.x - self.x;
		var dy = self.target.y - self.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist < 1) dist = 1;
		var vx = dx / dist * self.speed;
		var vy = dy / dist * self.speed;
		self.x += vx;
		self.y += vy;
		// Rotate arrow to face target
		self.asset.rotation = Math.atan2(dy, dx);
		// Check for collision with target (simple distance check)
		if (dist < 60) {
			// Hit!
			if (typeof self.target.health === "number") {
				self.target.health -= self.damage;
				// If the target is a soldier and its health drops to 0 or below, destroy it and remove from array
				if (self.target.health <= 0 && typeof self.target.team === "string") {
					self.target.destroyed = true;
					self.target.destroy();
					// Remove from correct array
					if (self.target.team === "enemy" && typeof enemySoldiers !== "undefined") {
						for (var i = 0; i < enemySoldiers.length; i++) {
							if (enemySoldiers[i] === self.target) {
								enemySoldiers.splice(i, 1);
								break;
							}
						}
					} else if (self.target.team === "player" && typeof playerSoldiers !== "undefined") {
						for (var i = 0; i < playerSoldiers.length; i++) {
							if (playerSoldiers[i] === self.target) {
								playerSoldiers.splice(i, 1);
								break;
							}
						}
					}
				}
			}
			self.destroyed = true;
			self.destroy();
		}
		// Remove if out of bounds (double the distance for longer arrows)
		if (self.x < -600 || self.x > 3200 || self.y < -600 || self.y > 4000) {
			self.destroyed = true;
			self.destroy();
		}
	};
	return self;
});
// Castle class for player and enemy castles
var Castle = Container.expand(function () {
	var self = Container.call(this);
	// Properties
	self.team = null;
	self.health = CASTLE_HEALTH_INIT;
	self.hasUpgrade = false;
	self.attack = 0;
	self.arrowCooldown = 0;
	self.arrowCooldownMax = 60; // frames between shots
	self.attackRadius = 500; // px, for arrow shooting
	self.asset = null;
	// Initialize castle
	self.init = function (team, x, y) {
		self.team = team;
		self.x = x;
		self.y = y;
		self.health = CASTLE_HEALTH_INIT;
		self.hasUpgrade = false;
		self.attack = 0;
		self.arrowCooldown = 0;
		// Remove previous asset if any
		if (self.asset) {
			self.removeChild(self.asset);
		}
		// Add correct asset
		if (team === 'player') {
			self.asset = self.attachAsset('castle_player', {
				anchorX: 0.5,
				anchorY: 0.5
			});
		} else {
			self.asset = self.attachAsset('castle_enemy', {
				anchorX: 0.5,
				anchorY: 0.5
			});
		}
	};
	// Upgrade castle
	self.upgrade = function () {
		self.hasUpgrade = true;
		self.health = 1500;
		self.attack = 1 + Math.floor(Math.random() * 3); // 1-3
		self.arrowCooldown = 0;
	};
	// Update castle (shoot arrows if upgraded)
	self.update = function () {
		if (self.hasUpgrade && self.health > 0) {
			// Only shoot at enemy soldiers in range
			var targets = [];
			if (self.team === 'player') {
				for (var i = 0; i < enemySoldiers.length; i++) {
					var e = enemySoldiers[i];
					var dx = e.x - self.x;
					var dy = e.y - self.y;
					if (dx * dx + dy * dy <= self.attackRadius * self.attackRadius) {
						targets.push(e);
					}
				}
			} else {
				for (var i = 0; i < playerSoldiers.length; i++) {
					var e = playerSoldiers[i];
					var dx = e.x - self.x;
					var dy = e.y - self.y;
					if (dx * dx + dy * dy <= self.attackRadius * self.attackRadius) {
						targets.push(e);
					}
				}
			}
			// Shoot at first target if cooldown is ready
			if (targets.length > 0 && self.arrowCooldown <= 0) {
				var target = targets[0];
				var arrow = new Arrow();
				arrow.init(self.x, self.y, target, self.attack, self.team);
				arrows.push(arrow);
				game.addChild(arrow);
				self.arrowCooldown = self.arrowCooldownMax;
			}
			if (self.arrowCooldown > 0) self.arrowCooldown--;
		}
	};
	return self;
});
// Soldier class for both player and enemy soldiers
var Soldier = Container.expand(function () {
	var self = Container.call(this);
	self.team = null;
	self.health = 100;
	self.attack = 10;
	self.speed = SOLDIER_SPEED;
	self.inCombat = false;
	self.asset = null;
	self.lastX = 0;
	self.lastY = 0;
	// Initialize soldier
	self.init = function (team, health, attack) {
		self.team = team;
		self.health = health;
		self.attack = attack;
		self.inCombat = false;
		// Remove previous asset if any
		if (self.asset) {
			self.removeChild(self.asset);
		}
		// Add correct asset
		if (team === 'player') {
			self.asset = self.attachAsset('soldier_player', {
				anchorX: 0.5,
				anchorY: 0.5
			});
		} else {
			self.asset = self.attachAsset('soldier_enemy', {
				anchorX: 0.5,
				anchorY: 0.5
			});
		}
	};
	// Update soldier position (move forward if not in combat)
	self.update = function () {
		self.lastX = self.x;
		self.lastY = self.y;
		if (!self.inCombat) {
			if (self.team === 'player') {
				self.x += self.speed;
			} else {
				self.x -= self.speed;
			}
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0xBFFF00
});

/**** 
* Game Code
****/ 
// --- Add background image ---
var background = LK.getAsset('background', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 0,
	width: GAME_W,
	height: GAME_H
});
game.addChild(background);
// --- Game constants ---
// Player castle (blue)
// Enemy castle (red)
// Player soldier (green)
// Enemy soldier (orange)
var GAME_W = 2048,
	GAME_H = 2732;
var CASTLE_OFFSET_X = 120,
	CASTLE_OFFSET_Y = GAME_H - 520; // moved up by 200px
var CASTLE_HEALTH_INIT = 1000;
var GOLD_INIT = 200;
var GOLD_PER_TICK = 5;
var GOLD_TICK_MS = 200;
var SOLDIER_COST = 100;
var SOLDIER_HEALTH_MIN = 80,
	SOLDIER_HEALTH_MAX = 160;
var SOLDIER_ATTACK_MIN = 20,
	SOLDIER_ATTACK_MAX = 50;
var SOLDIER_SPEED = 14 / 5; // px per frame (slowed down by 5x)
// --- Difficulty selection ---
var difficulty = null;
var ENEMY_SOLDIER_COST = 100; // default, will be set by difficulty
// Show difficulty selection overlay
var diffOverlay = new Container();
diffOverlay.zIndex = 10000; // ensure on top
diffOverlay.width = GAME_W;
diffOverlay.height = GAME_H;
// Use a Text2 as a fake overlay background (solid block) since centerCircle is removed
var overlayBg = new Text2(" ", {
	size: 10,
	fill: 0x000000
});
overlayBg.width = GAME_W;
overlayBg.height = GAME_H;
overlayBg.alpha = 0.7;
overlayBg.x = 0;
overlayBg.y = 0;
diffOverlay.addChild(overlayBg);
// Difficulty title with black background
var diffTitleBg = new Text2(" ", {
	size: 10,
	fill: 0x000000
});
diffTitleBg.width = 900;
diffTitleBg.height = 160;
diffTitleBg.alpha = 0.95;
diffTitleBg.anchor.set(0.5, 0.5);
diffTitleBg.x = GAME_W / 2;
diffTitleBg.y = GAME_H / 2 - 300;
diffOverlay.addChild(diffTitleBg);
var diffTitle = new Text2("Select Difficulty", {
	size: 120,
	fill: "#fff"
});
diffTitle.anchor.set(0.5, 0.5);
diffTitle.x = GAME_W / 2;
diffTitle.y = GAME_H / 2 - 300;
diffOverlay.addChild(diffTitle);
// Easy button with black background
var btnEasyBg = new Text2(" ", {
	size: 10,
	fill: 0x000000
});
btnEasyBg.width = 600;
btnEasyBg.height = 120;
btnEasyBg.alpha = 0.95;
btnEasyBg.anchor.set(0.5, 0.5);
btnEasyBg.x = GAME_W / 2;
btnEasyBg.y = GAME_H / 2 - 80;
diffOverlay.addChild(btnEasyBg);
var btnEasy = new Text2("Easy", {
	size: 100,
	fill: 0x00FF00
});
btnEasy.anchor.set(0.5, 0.5);
btnEasy.x = GAME_W / 2;
btnEasy.y = GAME_H / 2 - 80;
diffOverlay.addChild(btnEasy);
// Normal button with black background
var btnNormalBg = new Text2(" ", {
	size: 10,
	fill: 0x000000
});
btnNormalBg.width = 600;
btnNormalBg.height = 120;
btnNormalBg.alpha = 0.95;
btnNormalBg.anchor.set(0.5, 0.5);
btnNormalBg.x = GAME_W / 2;
btnNormalBg.y = GAME_H / 2 + 80;
diffOverlay.addChild(btnNormalBg);
var btnNormal = new Text2("Normal", {
	size: 100,
	fill: 0xFFFF00
});
btnNormal.anchor.set(0.5, 0.5);
btnNormal.x = GAME_W / 2;
btnNormal.y = GAME_H / 2 + 80;
diffOverlay.addChild(btnNormal);
// Hard button with black background
var btnHardBg = new Text2(" ", {
	size: 10,
	fill: 0x000000
});
btnHardBg.width = 600;
btnHardBg.height = 120;
btnHardBg.alpha = 0.95;
btnHardBg.anchor.set(0.5, 0.5);
btnHardBg.x = GAME_W / 2;
btnHardBg.y = GAME_H / 2 + 240;
diffOverlay.addChild(btnHardBg);
var btnHard = new Text2("Hard", {
	size: 100,
	fill: 0xFF0000
});
btnHard.anchor.set(0.5, 0.5);
btnHard.x = GAME_W / 2;
btnHard.y = GAME_H / 2 + 240;
diffOverlay.addChild(btnHard);
game.addChild(diffOverlay);
// Disable game input until difficulty is chosen
var gameInputEnabled = false;
// Helper to start game with selected difficulty
function selectDifficulty(level) {
	difficulty = level;
	if (difficulty === "easy") {
		ENEMY_SOLDIER_COST = SOLDIER_COST; // same as player
	} else if (difficulty === "normal") {
		ENEMY_SOLDIER_COST = Math.floor(SOLDIER_COST * 0.9); // 0.9 of player
	} else if (difficulty === "hard") {
		ENEMY_SOLDIER_COST = Math.floor(SOLDIER_COST * 0.7); // 0.7 of player
	}
	gameInputEnabled = true;
	diffOverlay.destroy();
	// Show solder button in the middle section (archerBtn will appear after upgrade)
	archerBtn.visible = false;
	solderBtn.visible = true;
}
// Add touch/click handlers for buttons
btnEasy.down = function (x, y, obj) {
	selectDifficulty("easy");
};
btnNormal.down = function (x, y, obj) {
	selectDifficulty("normal");
};
btnHard.down = function (x, y, obj) {
	selectDifficulty("hard");
};
// --- State variables ---
// (removed, handled by castlePlayer.health and castleEnemy.health)
var playerGold = GOLD_INIT;
var enemyGold = GOLD_INIT;
var playerSoldiers = [];
var enemySoldiers = [];
// --- Castles ---
var castlePlayer = new Castle();
castlePlayer.init('player', CASTLE_OFFSET_X, CASTLE_OFFSET_Y);
game.addChild(castlePlayer);
var castleEnemy = new Castle();
castleEnemy.init('enemy', GAME_W - CASTLE_OFFSET_X, CASTLE_OFFSET_Y);
game.addChild(castleEnemy);
// --- Enemy castle health display above castle ---
var castleEnemyHealthTxt = new Text2(castleEnemy.health + '', {
	size: 60,
	fill: '#fff'
});
castleEnemyHealthTxt.anchor.set(0.5, 1.2);
castleEnemyHealthTxt.x = castleEnemy.x;
castleEnemyHealthTxt.y = castleEnemy.y - 260; // above the castle
game.addChild(castleEnemyHealthTxt);
// --- Player castle unit cost labels above castle ---
var soldierCostTxt = new Text2("soldier 100 gold", {
	size: 54,
	fill: "#000"
});
soldierCostTxt.anchor.set(0.5, 1.2);
soldierCostTxt.x = castlePlayer.x;
soldierCostTxt.y = castlePlayer.y - 260;
game.addChild(soldierCostTxt);
var cavalryCostTxt = new Text2("cavalry 120 gold", {
	size: 54,
	fill: "#000"
});
cavalryCostTxt.anchor.set(0.5, 1.02);
cavalryCostTxt.x = castlePlayer.x;
cavalryCostTxt.y = castlePlayer.y - 180;
game.addChild(cavalryCostTxt);
// --- Player castle upgrade cost label under player castle ---
var playerCastleUpgradeTxt = new Text2("YOU NEED 350 GOLD\nTO UPGRADE.", {
	size: 54,
	fill: "#000"
});
playerCastleUpgradeTxt.anchor.set(0.5, -0.2); // anchor above the text baseline
playerCastleUpgradeTxt.x = castlePlayer.x + 180;
playerCastleUpgradeTxt.y = castlePlayer.y + 320; // under the castle
game.addChild(playerCastleUpgradeTxt);
// --- Left side: archer_button and solder_button side by side, visible on screen ---
var leftButtonsY = GAME_H / 2 + 100;
var leftButtonSpacing = 40;
var leftButtonStartX = 120 + 75; // 120px margin + half button width (150/2)
// Archer button (leftmost)
var archerBtn = LK.getAsset('archer_button', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: leftButtonStartX,
	y: leftButtonsY
});
archerBtn.visible = false;
game.addChild(archerBtn);
// Solder button (right of archer)
var solderBtn = LK.getAsset('solder_button', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: leftButtonStartX + 150 + leftButtonSpacing,
	// 150 is button width
	y: leftButtonsY
});
solderBtn.visible = false;
game.addChild(solderBtn);
// --- GUI: Health and Gold displays ---
var playerHealthTxt = new Text2('1000', {
	size: 70,
	fill: '#fff'
});
playerHealthTxt.anchor.set(0, 0);
LK.gui.top.addChild(playerHealthTxt);
// Player LIFE label
var playerLifeLabel = new Text2('LIFE', {
	size: 38,
	fill: "#000"
});
playerLifeLabel.anchor.set(0, 0);
LK.gui.top.addChild(playerLifeLabel);
var playerGoldTxt = new Text2('200', {
	size: 60,
	fill: '#ffe600'
});
playerGoldTxt.anchor.set(0, 0);
LK.gui.top.addChild(playerGoldTxt);
// Add soldier/cavalry cost labels to the left of the tan score
var guiSoldierCostTxt = new Text2("soldier 100 gold", {
	size: 38,
	fill: "#000"
});
guiSoldierCostTxt.anchor.set(1, 0);
LK.gui.top.addChild(guiSoldierCostTxt);
var guiCavalryCostTxt = new Text2("cavalry 120 gold", {
	size: 38,
	fill: "#000"
});
guiCavalryCostTxt.anchor.set(1, 0);
LK.gui.top.addChild(guiCavalryCostTxt);
// Player GOLD label
var playerGoldLabel = new Text2('GOLD', {
	size: 38,
	fill: "#000"
});
playerGoldLabel.anchor.set(0, 0);
LK.gui.top.addChild(playerGoldLabel);
var enemyHealthTxt = new Text2('1000', {
	size: 70,
	fill: '#fff'
});
enemyHealthTxt.anchor.set(1, 0);
LK.gui.top.addChild(enemyHealthTxt);
// Enemy LIFE label
var enemyLifeLabel = new Text2('LIFE', {
	size: 38,
	fill: "#000"
});
enemyLifeLabel.anchor.set(1, 0);
LK.gui.top.addChild(enemyLifeLabel);
var enemyGoldTxt = new Text2('200', {
	size: 60,
	fill: '#ffe600'
});
enemyGoldTxt.anchor.set(1, 0);
LK.gui.top.addChild(enemyGoldTxt);
// Enemy GOLD label
var enemyGoldLabel = new Text2('GOLD', {
	size: 38,
	fill: "#000"
});
enemyGoldLabel.anchor.set(1, 0);
LK.gui.top.addChild(enemyGoldLabel);
// --- Win Counter (Rounds Won) ---
// Use storage plugin for persistence
var roundsWon = storage.roundsWon || 0;
var roundsWonTxt = new Text2('Rounds Won: ' + roundsWon, {
	size: 60,
	fill: '#00ff00'
});
roundsWonTxt.anchor.set(1, 0);
LK.gui.top.addChild(roundsWonTxt);
roundsWonTxt.x = LK.gui.width - 40;
roundsWonTxt.y = 220;
// Position GUI elements
playerHealthTxt.x = 120;
playerHealthTxt.y = 40;
playerLifeLabel.x = playerHealthTxt.x + playerHealthTxt.width + 18;
playerLifeLabel.y = playerHealthTxt.y + 10;
playerGoldTxt.x = 120;
playerGoldTxt.y = 120;
playerGoldLabel.x = playerGoldTxt.x + playerGoldTxt.width + 18;
playerGoldLabel.y = playerGoldTxt.y + 8;
// Position soldier/cavalry cost labels to the left of the tan score
guiSoldierCostTxt.x = playerGoldTxt.x - 30;
guiSoldierCostTxt.y = playerGoldTxt.y - 8;
guiCavalryCostTxt.x = playerGoldTxt.x - 30;
guiCavalryCostTxt.y = playerGoldTxt.y + 38;
enemyHealthTxt.x = LK.gui.width - 120;
enemyHealthTxt.y = 40;
enemyLifeLabel.x = enemyHealthTxt.x - enemyHealthTxt.width - 18;
enemyLifeLabel.y = enemyHealthTxt.y + 10;
enemyGoldTxt.x = LK.gui.width - 120;
enemyGoldTxt.y = 120;
enemyGoldLabel.x = enemyGoldTxt.x - enemyGoldTxt.width - 18;
enemyGoldLabel.y = enemyGoldTxt.y + 8;
// --- Gold income timer ---
var goldTimer = LK.setInterval(function () {
	// Only increase gold if difficulty has been chosen
	if (!gameInputEnabled) return;
	playerGold += GOLD_PER_TICK;
	enemyGold += GOLD_PER_TICK;
	updateGui();
}, GOLD_TICK_MS);
// --- GUI update function ---
function updateGui() {
	playerHealthTxt.setText(castlePlayer.health);
	playerLifeLabel.x = playerHealthTxt.x + playerHealthTxt.width + 18;
	playerLifeLabel.y = playerHealthTxt.y + 10;
	playerGoldTxt.setText(playerGold);
	playerGoldLabel.x = playerGoldTxt.x + playerGoldTxt.width + 18;
	playerGoldLabel.y = playerGoldTxt.y + 8;
	enemyHealthTxt.setText(castleEnemy.health);
	enemyLifeLabel.x = enemyHealthTxt.x - enemyHealthTxt.width - 18;
	enemyLifeLabel.y = enemyHealthTxt.y + 10;
	enemyGoldTxt.setText(enemyGold);
	enemyGoldLabel.x = enemyGoldTxt.x - enemyGoldTxt.width - 18;
	enemyGoldLabel.y = enemyGoldTxt.y + 8;
	// Update enemy castle health text and position
	castleEnemyHealthTxt.setText(castleEnemy.health);
	castleEnemyHealthTxt.x = castleEnemy.x;
	castleEnemyHealthTxt.y = castleEnemy.y - 260;
}
// --- Deploy soldier function ---
function deploySoldier(team) {
	// Block deployment if difficulty not chosen
	if (!gameInputEnabled) return false;
	var gold = team === 'player' ? playerGold : enemyGold;
	var cost = team === 'player' ? SOLDIER_COST : ENEMY_SOLDIER_COST;
	if (gold < cost) return false;
	// Deduct gold
	if (team === 'player') playerGold -= SOLDIER_COST;else enemyGold -= ENEMY_SOLDIER_COST;
	// Fixed health and random attack
	var health = 25;
	var attack = 5 + Math.floor(Math.random() * 6); // 5-10 inclusive
	// Create soldier
	var s = new Soldier();
	s.init(team, health, attack);
	s.speed = SOLDIER_SPEED;
	s.inCombat = false;
	// Position
	s.y = CASTLE_OFFSET_Y + 120; // Move soldiers' exit position down by 120px
	if (team === 'player') {
		s.x = castlePlayer.x + 120;
		playerSoldiers.push(s);
	} else {
		s.x = castleEnemy.x - 120;
		enemySoldiers.push(s);
	}
	game.addChild(s);
	return true;
}
// --- Player tap to upgrade castle only (soldier deploy moved to solderBtn.down) ---
game.down = function (x, y, obj) {
	// Block input until difficulty is chosen
	if (!gameInputEnabled) return;
	// Check if player clicked on their castle for upgrade
	var dx = x - castlePlayer.x;
	var dy = y - castlePlayer.y;
	if (dx * dx + dy * dy < 250 * 250 && !castlePlayer.hasUpgrade && playerGold >= 350) {
		playerGold -= 350;
		castlePlayer.upgrade();
		updateGui();
		// Show archerBtn after upgrade
		archerBtn.visible = true;
		// Remove the upgrade text after rising the castle
		if (playerCastleUpgradeTxt && typeof playerCastleUpgradeTxt.destroy === "function") {
			playerCastleUpgradeTxt.destroy();
			playerCastleUpgradeTxt = null;
		}
		return;
	}
	// (Removed: deploySoldier on screen tap)
};
// --- Deploy soldier when solderBtn is pressed ---
solderBtn.down = function (x, y, obj) {
	if (!gameInputEnabled) return;
	if (playerGold >= SOLDIER_COST) {
		deploySoldier('player');
		updateGui();
	}
};
// --- Deploy archer_player when archerBtn is pressed (uses archer_player asset, cost 10 gold) ---
archerBtn.down = function (x, y, obj) {
	if (!gameInputEnabled) return;
	if (playerGold >= 120) {
		playerGold -= 120;
		// Create a new Soldier but use archer_player asset
		var s = new Soldier();
		// Set archer_player health to be twice that of soldier_player
		var baseSoldierHealth = 25;
		s.init('player', baseSoldierHealth * 2, 5 + Math.floor(Math.random() * 6)); // health 50, attack 5-10
		s.speed = SOLDIER_SPEED * 0.8;
		s.inCombat = false;
		// Remove previous asset and attach archer_player asset
		if (s.asset) {
			s.removeChild(s.asset);
		}
		s.asset = s.attachAsset('archer_player', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		// Position
		s.y = CASTLE_OFFSET_Y + 120;
		s.x = castlePlayer.x + 120;
		playerSoldiers.push(s);
		game.addChild(s);
		updateGui();
	}
};
// --- Enemy AI: deploy soldier automatically if enough gold ---
// Track enemy soldier deployments for 2:1 soldier:archer ratio
var enemySoldierDeployCount = 0;
var enemyNextUnit = 'soldier'; // always start with soldier
var enemyTotalSoldierDeployed = 0;
var enemyUpgradeGoldReserved = 200;
var enemyDeployTimer = LK.setInterval(function () {
	// Block AI until difficulty is chosen
	if (!gameInputEnabled) return;
	// If not upgraded, reserve 200 gold for upgrade after 10 soldiers
	if (!castleEnemy.hasUpgrade) {
		// In hard mode, upgrade for free after 10 soldiers
		if (difficulty === "hard") {
			if (enemyTotalSoldierDeployed >= 10) {
				castleEnemy.upgrade();
				updateGui();
				return;
			}
		} else {
			// Only upgrade after 10 soldier_enemy deployed and enough gold (350 - 200 = 150 must be available for upgrade)
			if (enemyTotalSoldierDeployed >= 10 && enemyGold >= 350 - enemyUpgradeGoldReserved) {
				enemyGold -= 350 - enemyUpgradeGoldReserved;
				castleEnemy.upgrade();
				updateGui();
				return;
			}
		}
	}
	// If not upgraded and haven't deployed 10 soldiers, only deploy if enough gold and after reserving 200 for upgrade
	if (!castleEnemy.hasUpgrade && enemyTotalSoldierDeployed < 10) {
		if (enemyNextUnit === 'soldier' && enemyGold >= ENEMY_SOLDIER_COST + enemyUpgradeGoldReserved) {
			if (deploySoldier('enemy')) {
				updateGui();
				enemySoldierDeployCount++;
				enemyTotalSoldierDeployed++;
				// After 2 soldiers, next must be archer (if possible)
				if (enemySoldierDeployCount >= 2) {
					enemyNextUnit = 'soldier'; // No archers before upgrade
					enemySoldierDeployCount = 0;
				}
			}
		}
		// Do not deploy archers before upgrade
		return;
	}
	// After upgrade, normal logic: after every 2 soldiers, deploy 1 archer
	if (enemyNextUnit === 'soldier' && enemyGold >= ENEMY_SOLDIER_COST) {
		if (deploySoldier('enemy')) {
			updateGui();
			enemySoldierDeployCount++;
			enemyTotalSoldierDeployed++;
			// After 2 soldiers, next must be archer (if possible)
			if (enemySoldierDeployCount >= 2 && castleEnemy.hasUpgrade) {
				enemyNextUnit = 'archer';
			} else {
				enemyNextUnit = 'soldier';
			}
		}
	} else if (enemyNextUnit === 'archer' && castleEnemy.hasUpgrade && enemyGold >= 120) {
		// Deploy archer_enemy
		enemyGold -= 120;
		var s = new Soldier();
		var baseSoldierHealth = 25;
		s.init('enemy', baseSoldierHealth * 2, 5 + Math.floor(Math.random() * 6)); // health 50, attack 5-10
		s.speed = SOLDIER_SPEED * 0.8;
		s.inCombat = false;
		if (s.asset) {
			s.removeChild(s.asset);
		}
		s.asset = s.attachAsset('archer_enemy', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		s.y = CASTLE_OFFSET_Y + 120;
		s.x = castleEnemy.x - 120;
		enemySoldiers.push(s);
		game.addChild(s);
		updateGui();
		// Reset soldier deploy count and go back to soldier
		enemySoldierDeployCount = 0;
		enemyNextUnit = 'soldier';
	}
}, 600);
// --- Arrows array ---
var arrows = [];
// --- Main update loop ---
game.update = function () {
	// --- Update castles (health, arrows) ---
	castlePlayer.update();
	castleEnemy.update();
	// --- Update all soldiers ---
	// 1. Move soldiers forward if not in combat
	// 2. Check for combat with opposing soldiers
	// 3. If at enemy castle, attack castle
	// --- Player soldiers ---
	for (var i = playerSoldiers.length - 1; i >= 0; i--) {
		var s = playerSoldiers[i];
		s.inCombat = false;
		// Check for enemy soldier in range
		var engaged = false;
		for (var j = 0; j < enemySoldiers.length; j++) {
			var e = enemySoldiers[j];
			// If close enough (overlap)
			if (Math.abs(s.x - e.x) < 80) {
				// Engage in combat
				s.inCombat = true;
				e.inCombat = true;
				// Both attack each other
				if (LK.ticks % 12 === 0) {
					// Attack every 12 frames (~5 times/sec)
					e.health -= s.attack;
					s.health -= e.attack;
				}
				// Remove dead soldiers
				if (e.health <= 0) {
					e.destroy();
					enemySoldiers.splice(j, 1);
					j--;
					// Award 10 gold to player for killing enemy soldier
					playerGold += 10;
					updateGui();
				}
				if (s.health <= 0) {
					s.destroy();
					playerSoldiers.splice(i, 1);
					i--;
					// Award 10 gold to enemy for killing player soldier
					enemyGold += 10;
					updateGui();
					engaged = true;
					break;
				}
				engaged = true;
				break;
			}
		}
		if (engaged) continue;
		// If not in combat, check if at enemy castle
		if (Math.abs(s.x - castleEnemy.x) < 120) {
			s.inCombat = true;
			if (LK.ticks % 12 === 0) {
				castleEnemy.health -= s.attack;
				if (castleEnemy.health < 0) castleEnemy.health = 0;
				updateGui();
			}
			// Remove soldier if castle destroyed
			if (castleEnemy.health <= 0) {
				s.destroy();
				playerSoldiers.splice(i, 1);
				i--;
			}
		}
	}
	// --- Enemy soldiers ---
	for (var i = enemySoldiers.length - 1; i >= 0; i--) {
		var s = enemySoldiers[i];
		s.inCombat = false;
		// Check for player soldier in range
		var engaged = false;
		for (var j = 0; j < playerSoldiers.length; j++) {
			var e = playerSoldiers[j];
			if (Math.abs(s.x - e.x) < 80) {
				s.inCombat = true;
				e.inCombat = true;
				if (LK.ticks % 12 === 0) {
					e.health -= s.attack;
					s.health -= e.attack;
				}
				if (e.health <= 0) {
					e.destroy();
					playerSoldiers.splice(j, 1);
					j--;
					// Award 10 gold to enemy for killing player soldier
					enemyGold += 10;
					updateGui();
				}
				if (s.health <= 0) {
					s.destroy();
					enemySoldiers.splice(i, 1);
					i--;
					// Award 10 gold to player for killing enemy soldier
					playerGold += 10;
					updateGui();
					engaged = true;
					break;
				}
				engaged = true;
				break;
			}
		}
		if (engaged) continue;
		// If not in combat, check if at player castle
		if (Math.abs(s.x - castlePlayer.x) < 120) {
			s.inCombat = true;
			if (LK.ticks % 12 === 0) {
				castlePlayer.health -= s.attack;
				if (castlePlayer.health < 0) castlePlayer.health = 0;
				updateGui();
			}
			if (castlePlayer.health <= 0) {
				s.destroy();
				enemySoldiers.splice(i, 1);
				i--;
			}
		}
	}
	// --- Move soldiers ---
	for (var i = 0; i < playerSoldiers.length; i++) {
		playerSoldiers[i].update();
	}
	for (var i = 0; i < enemySoldiers.length; i++) {
		enemySoldiers[i].update();
	}
	// --- Update arrows ---
	for (var i = arrows.length - 1; i >= 0; i--) {
		var a = arrows[i];
		a.update();
		if (a.destroyed) {
			arrows.splice(i, 1);
		}
	}
	// --- Check win/lose ---
	if (castlePlayer.health <= 0) {
		LK.effects.flashScreen(0xff0000, 1000);
		LK.showGameOver();
		return;
	}
	if (castleEnemy.health <= 0) {
		// Increase and persist rounds won
		roundsWon = (storage.roundsWon || 0) + 1;
		storage.roundsWon = roundsWon;
		roundsWonTxt.setText('Rounds Won: ' + roundsWon);
		LK.effects.flashScreen(0x00ff00, 1000);
		LK.showYouWin();
		return;
	}
};
// --- Clean up timers on game over ---
game.destroy = function () {
	LK.clearInterval(goldTimer);
	LK.clearInterval(enemyDeployTimer);
};

===================================================================
--- original.js
+++ change.js
@@ -486,8 +486,21 @@
 	fill: '#ffe600'
 });
 playerGoldTxt.anchor.set(0, 0);
 LK.gui.top.addChild(playerGoldTxt);
+// Add soldier/cavalry cost labels to the left of the tan score
+var guiSoldierCostTxt = new Text2("soldier 100 gold", {
+	size: 38,
+	fill: "#000"
+});
+guiSoldierCostTxt.anchor.set(1, 0);
+LK.gui.top.addChild(guiSoldierCostTxt);
+var guiCavalryCostTxt = new Text2("cavalry 120 gold", {
+	size: 38,
+	fill: "#000"
+});
+guiCavalryCostTxt.anchor.set(1, 0);
+LK.gui.top.addChild(guiCavalryCostTxt);
 // Player GOLD label
 var playerGoldLabel = new Text2('GOLD', {
 	size: 38,
 	fill: "#000"
@@ -539,8 +552,13 @@
 playerGoldTxt.x = 120;
 playerGoldTxt.y = 120;
 playerGoldLabel.x = playerGoldTxt.x + playerGoldTxt.width + 18;
 playerGoldLabel.y = playerGoldTxt.y + 8;
+// Position soldier/cavalry cost labels to the left of the tan score
+guiSoldierCostTxt.x = playerGoldTxt.x - 30;
+guiSoldierCostTxt.y = playerGoldTxt.y - 8;
+guiCavalryCostTxt.x = playerGoldTxt.x - 30;
+guiCavalryCostTxt.y = playerGoldTxt.y + 38;
 enemyHealthTxt.x = LK.gui.width - 120;
 enemyHealthTxt.y = 40;
 enemyLifeLabel.x = enemyHealthTxt.x - enemyHealthTxt.width - 18;
 enemyLifeLabel.y = enemyHealthTxt.y + 10;