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

/**** 
* Classes
****/ 
// Building class
var Building = Container.expand(function () {
	var self = Container.call(this);
	var buildingSprite = self.attachAsset('building', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = buildingSprite.width / 2;
	self.entry = null;
	self.hasEntry = false;
	self.entryX = 0;
	self.entryY = 0;
	self.id = '';
	self.addEntry = function () {
		self.hasEntry = true;
		self.entry = self.attachAsset('building_entry', {
			anchorX: 0.5,
			anchorY: 0.5,
			x: buildingSprite.width / 2 - 30,
			y: buildingSprite.height / 2 - 30
		});
		self.entryX = self.x + buildingSprite.width / 2 - 30;
		self.entryY = self.y + buildingSprite.height / 2 - 30;
	};
	return self;
});
// Helicopter class
var Helicopter = Container.expand(function () {
	var self = Container.call(this);
	var heliSprite = self.attachAsset('helicopter', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 28;
	self.radius = heliSprite.width / 2;
	self.target = null;
	self.update = function () {
		if (!self.target) return;
		// Hover above target
		var dx = self.target.x - self.x;
		var dy = self.target.y - 300 - self.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist > 0) {
			self.x += self.speed * dx / dist;
			self.y += self.speed * dy / dist;
		}
	};
	return self;
});
// Item class
var Item = Container.expand(function () {
	var self = Container.call(this);
	var itemSprite = self.attachAsset('item', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = itemSprite.width / 2;
	self.id = '';
	self.collected = false;
	self.update = function () {};
	return self;
});
// NPC class
var NPC = Container.expand(function () {
	var self = Container.call(this);
	var npcSprite = self.attachAsset('npc', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = npcSprite.width / 2;
	self.isSpecial = false;
	self.hasQuest = false;
	self.questGiven = false;
	self.questCompleted = false;
	self.questType = null;
	self.questTarget = null;
	self.questText = '';
	self.id = '';
	self.update = function () {};
	return self;
});
// Player class
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerSprite = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 18;
	self.radius = playerSprite.width / 2;
	self.isInBuilding = false;
	self.targetX = self.x;
	self.targetY = self.y;
	self.moveTo = function (x, y) {
		self.targetX = x;
		self.targetY = y;
	};
	self.update = function () {
		// Move towards targetX, targetY
		var dx = self.targetX - self.x;
		var dy = self.targetY - self.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist > self.speed) {
			self.x += self.speed * dx / dist;
			self.y += self.speed * dy / dist;
		} else {
			self.x = self.targetX;
			self.y = self.targetY;
		}
	};
	return self;
});
// Police Car class
var PoliceCar = Container.expand(function () {
	var self = Container.call(this);
	var policeSprite = self.attachAsset('police', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 22;
	self.radius = policeSprite.width / 2;
	self.target = null;
	self.update = function () {
		if (!self.target) return;
		var dx = self.target.x - self.x;
		var dy = self.target.y - self.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist > 0) {
			self.x += self.speed * dx / dist;
			self.y += self.speed * dy / dist;
		}
	};
	return self;
});
// Special NPC class
var SpecialNPC = Container.expand(function () {
	var self = Container.call(this);
	// Attach the special NPC asset and set tint directly
	var npcSpecialSprite = self.attachAsset('npc_special', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.isSpecial = true;
	self.hasQuest = true;
	self.questGiven = false;
	self.questCompleted = false;
	self.questType = 'find_item';
	self.questText = 'Find my lost wallet!';
	// No need to set tint, as the asset is already colored
	return self;
});

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

/**** 
* Game Code
****/ 
// Star (wanted level)
// Item
// Buildings
// Police
// NPCs
// Player
// World boundaries
var WORLD_W = 2048;
var WORLD_H = 2732;
// Player
var player = new Player();
player.x = WORLD_W / 2;
player.y = WORLD_H / 2;
game.addChild(player);
// NPCs
var npcs = [];
var specialNpcs = [];
var npcPositions = [{
	x: 400,
	y: 600
}, {
	x: 1700,
	y: 800
}, {
	x: 800,
	y: 2000
}, {
	x: 1600,
	y: 2200
}];
for (var i = 0; i < npcPositions.length; i++) {
	var npc = new NPC();
	npc.x = npcPositions[i].x;
	npc.y = npcPositions[i].y;
	npc.id = 'npc' + i;
	npcs.push(npc);
	game.addChild(npc);
}
// Add a special NPC with a quest
var specialNpc = new SpecialNPC();
specialNpc.x = 600;
specialNpc.y = 1500;
specialNpc.id = 'special1';
specialNpcs.push(specialNpc);
game.addChild(specialNpc);
// Buildings
var buildings = [];
var buildingPositions = [{
	x: 300,
	y: 400
}, {
	x: 1700,
	y: 400
}, {
	x: 300,
	y: 2000
}, {
	x: 1700,
	y: 2000
}];
for (var i = 0; i < buildingPositions.length; i++) {
	var b = new Building();
	b.x = buildingPositions[i].x;
	b.y = buildingPositions[i].y;
	b.id = 'building' + i;
	b.addEntry();
	buildings.push(b);
	game.addChild(b);
}
// Items (for quests)
var items = [];
var questItem = new Item();
questItem.x = 1800;
questItem.y = 1400;
questItem.id = 'wallet';
items.push(questItem);
game.addChild(questItem);
// Police
var policeCars = [];
var helicopters = [];
// Wanted system
var wantedLevel = 0; // 0-5
var wantedDecayTimer = 0;
var wantedMax = 5;
// GUI: Wanted stars
var starIcons = [];
for (var i = 0; i < wantedMax; i++) {
	var star = LK.getAsset('star', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	star.x = 120 + i * 70;
	star.y = 80;
	star.visible = false;
	LK.gui.top.addChild(star);
	starIcons.push(star);
}
// GUI: Quest text
var questText = new Text2('', {
	size: 70,
	fill: "#fff"
});
questText.anchor.set(0.5, 0);
questText.x = LK.gui.width / 2;
questText.y = 180;
LK.gui.top.addChild(questText);
// GUI: Mission complete text
var missionText = new Text2('', {
	size: 90,
	fill: 0x27AE60
});
missionText.anchor.set(0.5, 0);
missionText.x = LK.gui.width / 2;
missionText.y = 300;
LK.gui.top.addChild(missionText);
// GUI: Police alert text
var policeText = new Text2('', {
	size: 80,
	fill: 0xE74C3C
});
policeText.anchor.set(0.5, 0);
policeText.x = LK.gui.width / 2;
policeText.y = 400;
LK.gui.top.addChild(policeText);
// Dragging/movement
var dragging = false;
// Helper: Check circle collision
function circlesCollide(a, b) {
	var dx = a.x - b.x;
	var dy = a.y - b.y;
	var dist = Math.sqrt(dx * dx + dy * dy);
	return dist < a.radius + b.radius - 10;
}
// Helper: Show wanted stars
function updateWantedStars() {
	for (var i = 0; i < wantedMax; i++) {
		starIcons[i].visible = i < wantedLevel;
	}
}
// Helper: Set quest text
function setQuestText(txt) {
	questText.setText(txt);
}
// Helper: Set mission text
function setMissionText(txt) {
	missionText.setText(txt);
	if (txt) {
		tween(missionText, {
			alpha: 1
		}, {
			duration: 0
		});
		tween(missionText, {
			alpha: 0
		}, {
			duration: 1800,
			easing: tween.linear
		});
	}
}
// Helper: Set police alert
function setPoliceText(txt) {
	policeText.setText(txt);
	if (txt) {
		tween(policeText, {
			alpha: 1
		}, {
			duration: 0
		});
		tween(policeText, {
			alpha: 0
		}, {
			duration: 1800,
			easing: tween.linear
		});
	}
}
// Helper: Enter building
function tryEnterBuilding() {
	for (var i = 0; i < buildings.length; i++) {
		var b = buildings[i];
		if (circlesCollide(player, b)) {
			// Enter if near entry
			if (b.hasEntry && Math.abs(player.x - (b.x + b.entry.x)) < 80 && Math.abs(player.y - (b.y + b.entry.y)) < 80) {
				player.isInBuilding = true;
				setQuestText('You entered a building. Tap outside to exit.');
				// Move player to center of building
				player.x = b.x + 150;
				player.y = b.y + 150;
				return true;
			}
		}
	}
	return false;
}
// Helper: Exit building
function tryExitBuilding() {
	if (player.isInBuilding) {
		// Move player outside
		player.x = player.x + 200;
		player.y = player.y + 200;
		player.isInBuilding = false;
		setQuestText('');
	}
}
// Helper: Interact with NPCs
function tryInteractNPC() {
	for (var i = 0; i < npcs.length; i++) {
		var npc = npcs[i];
		if (circlesCollide(player, npc)) {
			setQuestText('Hi! Nice weather today.');
			return true;
		}
	}
	for (var i = 0; i < specialNpcs.length; i++) {
		var npc = specialNpcs[i];
		if (circlesCollide(player, npc)) {
			if (!npc.questGiven && !npc.questCompleted) {
				setQuestText(npc.questText);
				npc.questGiven = true;
				return true;
			} else if (npc.questGiven && !npc.questCompleted) {
				// Check if player has item
				for (var j = 0; j < items.length; j++) {
					if (items[j].id === 'wallet' && items[j].collected) {
						npc.questCompleted = true;
						setQuestText('Thank you for finding my wallet!');
						setMissionText('Mission Complete!');
						LK.setScore(LK.getScore() + 1);
						return true;
					}
				}
				setQuestText('Did you find my wallet?');
				return true;
			} else if (npc.questCompleted) {
				setQuestText('Thanks again!');
				return true;
			}
		}
	}
	return false;
}
// Helper: Interact with items
function tryCollectItem() {
	for (var i = 0; i < items.length; i++) {
		var item = items[i];
		if (!item.collected && circlesCollide(player, item)) {
			item.collected = true;
			item.visible = false;
			setMissionText('You found a wallet!');
			return true;
		}
	}
	return false;
}
// Helper: Commit crime (damage property)
function tryDamageProperty(x, y) {
	// If player is near a building, "damage" it
	for (var i = 0; i < buildings.length; i++) {
		var b = buildings[i];
		var dx = x - (b.x + 150);
		var dy = y - (b.y + 150);
		if (Math.abs(dx) < 150 && Math.abs(dy) < 150) {
			// Crime committed!
			wantedLevel = Math.min(wantedLevel + 1, wantedMax);
			updateWantedStars();
			setPoliceText('Police alerted!');
			wantedDecayTimer = 0;
			LK.effects.flashObject(b, 0xff0000, 500);
			return true;
		}
	}
	return false;
}
// Police AI: spawn police based on wanted level
function updatePolice() {
	// Remove police if wantedLevel is 0
	if (wantedLevel === 0) {
		for (var i = 0; i < policeCars.length; i++) {
			policeCars[i].destroy();
		}
		policeCars = [];
		for (var i = 0; i < helicopters.length; i++) {
			helicopters[i].destroy();
		}
		helicopters = [];
		return;
	}
	// Spawn police cars
	while (policeCars.length < wantedLevel && policeCars.length < 3) {
		var pc = new PoliceCar();
		// Spawn at random edge
		var edge = Math.floor(Math.random() * 4);
		if (edge === 0) {
			pc.x = 0;
			pc.y = Math.random() * WORLD_H;
		}
		if (edge === 1) {
			pc.x = WORLD_W;
			pc.y = Math.random() * WORLD_H;
		}
		if (edge === 2) {
			pc.x = Math.random() * WORLD_W;
			pc.y = 0;
		}
		if (edge === 3) {
			pc.x = Math.random() * WORLD_W;
			pc.y = WORLD_H;
		}
		pc.target = player;
		policeCars.push(pc);
		game.addChild(pc);
	}
	// Spawn helicopter at wanted level 4+
	if (wantedLevel >= 4 && helicopters.length < 1) {
		var heli = new Helicopter();
		heli.x = Math.random() * WORLD_W;
		heli.y = 0;
		heli.target = player;
		helicopters.push(heli);
		game.addChild(heli);
	}
}
// Police AI: check for player caught
function checkPoliceCatch() {
	for (var i = 0; i < policeCars.length; i++) {
		if (circlesCollide(player, policeCars[i])) {
			LK.effects.flashScreen(0xff0000, 1000);
			setPoliceText('You were caught!');
			LK.showGameOver();
			return true;
		}
	}
	for (var i = 0; i < helicopters.length; i++) {
		if (Math.abs(player.x - helicopters[i].x) < 80 && Math.abs(player.y - helicopters[i].y) < 80) {
			LK.effects.flashScreen(0xff0000, 1000);
			setPoliceText('Helicopter caught you!');
			LK.showGameOver();
			return true;
		}
	}
	return false;
}
// Decay wanted level over time
function decayWantedLevel() {
	if (wantedLevel > 0) {
		wantedDecayTimer++;
		if (wantedDecayTimer > 300) {
			// ~5 seconds
			wantedLevel--;
			updateWantedStars();
			wantedDecayTimer = 0;
		}
	}
}
// Game move handler (tap to move, tap on NPC/building to interact)
function handleMove(x, y, obj) {
	// Convert to game coordinates
	if (dragging) {
		player.moveTo(x, y);
	}
}
// Tap down: move or interact
game.down = function (x, y, obj) {
	// If in building, tap outside to exit
	if (player.isInBuilding) {
		tryExitBuilding();
		return;
	}
	// Try interact with NPC
	if (tryInteractNPC()) return;
	// Try collect item
	if (tryCollectItem()) return;
	// Try enter building
	if (tryEnterBuilding()) return;
	// Try damage property (crime)
	if (tryDamageProperty(x, y)) return;
	// Otherwise, move
	player.moveTo(x, y);
	dragging = true;
	handleMove(x, y, obj);
};
game.up = function (x, y, obj) {
	dragging = false;
};
game.move = handleMove;
// Score display (missions completed)
var scoreTxt = new Text2('0', {
	size: 120,
	fill: "#fff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
scoreTxt.x = LK.gui.width / 2;
scoreTxt.y = 40;
// Main game update
game.update = function () {
	player.update();
	// Update NPCs
	for (var i = 0; i < npcs.length; i++) npcs[i].update();
	for (var i = 0; i < specialNpcs.length; i++) specialNpcs[i].update();
	// Update police
	for (var i = 0; i < policeCars.length; i++) policeCars[i].update();
	for (var i = 0; i < helicopters.length; i++) helicopters[i].update();
	// Police AI
	updatePolice();
	checkPoliceCatch();
	decayWantedLevel();
	// Update score
	scoreTxt.setText(LK.getScore());
	// Clamp player to world
	player.x = Math.max(player.radius, Math.min(WORLD_W - player.radius, player.x));
	player.y = Math.max(player.radius, Math.min(WORLD_H - player.radius, player.y));
};
// Initial wanted stars
updateWantedStars();
setQuestText('Explore the city! Tap on people or buildings.');
setMissionText('');
setPoliceText('');

===================================================================
--- original.js
+++ change.js
@@ -142,16 +142,20 @@
 });
 // Special NPC class
 var SpecialNPC = Container.expand(function () {
 	var self = Container.call(this);
+	// Attach the special NPC asset and set tint directly
+	var npcSpecialSprite = self.attachAsset('npc_special', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
 	self.isSpecial = true;
 	self.hasQuest = true;
 	self.questGiven = false;
 	self.questCompleted = false;
 	self.questType = 'find_item';
 	self.questText = 'Find my lost wallet!';
-	// Change color
-	self.children[0].tint = 0x8e44ad;
+	// No need to set tint, as the asset is already colored
 	return self;
 });
 
 /****