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

/**** 
* Classes
****/ 
// Class for NPCs (people to rescue)
var NPC = Container.expand(function () {
	var self = Container.call(this);
	// Attach NPC asset (ellipse, random color)
	var npcColor = 0x3498db + Math.floor(Math.random() * 0x222222);
	var npcAsset = self.attachAsset('npc', {
		width: 120,
		height: 120,
		color: npcColor,
		shape: 'ellipse',
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Is this NPC being dragged?
	self.isDragging = false;
	// Mark if rescued (to avoid double rescue)
	self.rescued = false;
	// For drag offset
	self.dragOffsetX = 0;
	self.dragOffsetY = 0;
	// Called every tick
	self.update = function () {
		// If not being dragged, move down and also move horizontally
		if (!self.isDragging && !self.rescued) {
			// Move down
			self.y += self.fallSpeed;
			// Move horizontally
			if (typeof self.dir === "undefined") {
				// Randomly pick initial direction: -1 (left) or 1 (right)
				self.dir = Math.random() < 0.5 ? -1 : 1;
			}
			if (typeof self.horizSpeed === "undefined") {
				// Random horizontal speed between 1.2 and 2.5
				self.horizSpeed = 1.2 + Math.random() * 1.3;
			}
			self.x += self.dir * self.horizSpeed;
			// Bounce off screen edges
			var margin = 70;
			if (self.x < margin) {
				self.x = margin;
				self.dir = 1;
			}
			if (self.x > 2048 - margin) {
				self.x = 2048 - margin;
				self.dir = -1;
			}
		}
	};
	// On down (touch/click)
	self.down = function (x, y, obj) {
		if (self.rescued) return;
		self.isDragging = true;
		// Calculate offset between touch and center
		self.dragOffsetX = self.x - x;
		self.dragOffsetY = self.y - y;
		// Bring to front
		if (self.parent) {
			self.parent.setChildIndex(self, self.parent.children.length - 1);
		}
	};
	// On up (touch/click release)
	self.up = function (x, y, obj) {
		self.isDragging = false;
	};
	return self;
});
// Class for Safe Zone
var SafeZone = Container.expand(function () {
	var self = Container.call(this);
	// Attach safe zone asset (green ellipse)
	var safeAsset = self.attachAsset('safezone', {
		width: 400,
		height: 180,
		color: 0x2ecc40,
		shape: 'ellipse',
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Add a label
	var label = new Text2('GÜVENLİ ALAN', {
		size: 60,
		fill: 0xFFFFFF
	});
	label.anchor.set(0.5, 0.5);
	label.y = 0;
	self.addChild(label);
	return self;
});
// Shark class: spawns in specific regions and chases nearest NPC
var Shark = Container.expand(function () {
	var self = Container.call(this);
	// Attach shark asset (use 'itler' for now, or replace with shark asset if available)
	var sharkAsset = self.attachAsset('itler', {
		width: 180,
		height: 100,
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Shark speed
	self.speed = 4 + Math.random() * 1.5;
	// Target NPC (to chase)
	self.target = null;
	// For region logic
	self.region = null;
	// For direction flip
	self.lastDir = 1;
	// Called every tick
	self.update = function () {
		// Find nearest NPC to chase
		if (npcs && npcs.length > 0) {
			var minDist = 99999;
			var closest = null;
			for (var i = 0; i < npcs.length; i++) {
				var npc = npcs[i];
				if (npc.rescued) continue;
				var dx = npc.x - self.x;
				var dy = npc.y - self.y;
				var dist = dx * dx + dy * dy;
				if (dist < minDist) {
					minDist = dist;
					closest = npc;
				}
			}
			self.target = closest;
		} else {
			self.target = null;
		}
		// Move toward target NPC
		if (self.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) {
				var moveX = dx / dist * self.speed;
				var moveY = dy / dist * self.speed * 0.7; // Slightly less vertical
				self.x += moveX;
				self.y += moveY;
				// Flip sprite if needed
				if (moveX < 0 && self.lastDir !== -1) {
					sharkAsset.scaleX = -1;
					self.lastDir = -1;
				} else if (moveX > 0 && self.lastDir !== 1) {
					sharkAsset.scaleX = 1;
					self.lastDir = 1;
				}
			}
		}
		// Clamp inside region
		if (self.region) {
			if (self.x < self.region.min) self.x = self.region.min;
			if (self.x > self.region.max) self.x = self.region.max;
		}
		// If shark goes below screen, respawn at top
		if (self.y > 2732 + 100) {
			self.respawn();
		}
	};
	// Respawn at top in a region
	self.respawn = function () {
		// Pick a region
		var sharkRegions = [{
			min: 300,
			max: 600
		}, {
			min: 900,
			max: 1200
		}, {
			min: 1500,
			max: 1800
		}];
		var region = sharkRegions[Math.floor(Math.random() * sharkRegions.length)];
		self.region = region;
		self.x = region.min + Math.random() * (region.max - region.min);
		self.y = -100 - Math.random() * 100;
		self.speed = 4 + Math.random() * 1.5;
	};
	// Initial spawn
	self.respawn();
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87ceeb // Sky blue
});

/**** 
* Game Code
****/ 
// Tween plugin for animations
// Game variables
var npcs = []; // All NPCs on screen
var sharks = []; // All sharks on screen
var safeZone; // The safe zone object
var score = 0;
var scoreTxt;
var spawnInterval = 180; // Initial spawn interval (frames)
var npcFallSpeed = 2.5; // Initial NPC fall speed
var minSpawnInterval = 60; // Minimum interval (hardest)
var maxNPCs = 3; // Max NPCs on screen at once (increases with difficulty)
var dragNode = null; // Currently dragged NPC
var lastMoveX = 0,
	lastMoveY = 0;
// Add Safe Zone at bottom center
safeZone = new SafeZone();
safeZone.x = 2048 / 2;
safeZone.y = 2732 - 200;
safeZone.isDragging = false;
safeZone.dragOffsetX = 0;
safeZone.lastX = safeZone.x;
game.addChild(safeZone);
// Play music '6' at game start
LK.playMusic('6');
// Score text at top center
scoreTxt = new Text2('0', {
	size: 120,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Helper: Spawn a new NPC at random X, near top
function spawnNPC() {
	if (npcs.length >= maxNPCs) return;
	var npc = new NPC();
	// --- itler (dogs) spawn at specific regions ---
	// Define allowed X regions for itler (dogs)
	var itlerRegions = [{
		min: 300,
		max: 600
	}, {
		min: 900,
		max: 1200
	}, {
		min: 1500,
		max: 1800
	}];
	// Pick a random region
	var region = itlerRegions[Math.floor(Math.random() * itlerRegions.length)];
	// Pick a random X within the region
	npc.x = region.min + Math.random() * (region.max - region.min);
	npc.y = 200 + Math.random() * 200;
	npc.fallSpeed = npcFallSpeed + Math.random() * 1.5;
	npc.isDragging = false;
	npc.rescued = false;
	npc.lastIntersecting = false;
	npcs.push(npc);
	game.addChild(npc);
}
// Helper: Remove NPC from game and array
function removeNPC(npc) {
	var idx = npcs.indexOf(npc);
	if (idx !== -1) {
		npcs.splice(idx, 1);
	}
	npc.destroy();
}
// Helper: Rescue NPC (with animation)
function rescueNPC(npc) {
	npc.rescued = true;
	// Animate: scale up and fade out
	tween(npc, {
		scaleX: 1.5,
		scaleY: 1.5,
		alpha: 0
	}, {
		duration: 400,
		easing: tween.easeOut,
		onFinish: function onFinish() {
			removeNPC(npc);
		}
	});
	// Score up
	score += 1;
	LK.setScore(score);
	scoreTxt.setText(score);
	// Difficulty increases every 5 points
	if (score % 5 === 0 && spawnInterval > minSpawnInterval) {
		spawnInterval -= 15;
		npcFallSpeed += 0.5;
		maxNPCs = Math.min(6, maxNPCs + 1);
		// Flash safe zone to indicate difficulty up
		LK.effects.flashObject(safeZone, 0xffff00, 400);
	}
}
// Helper: Game over (NPC fell below screen)
function triggerGameOver() {
	LK.effects.flashScreen(0xff0000, 800);
	LK.showGameOver();
}
// Game move handler (drag NPCs)
function handleMove(x, y, obj) {
	lastMoveX = x;
	lastMoveY = y;
	if (dragNode && !dragNode.rescued) {
		dragNode.x = x + dragNode.dragOffsetX;
		dragNode.y = y + dragNode.dragOffsetY;
	}
	// Safe zone dragging (horizontal only)
	if (safeZone.isDragging) {
		// Only allow horizontal movement, keep y fixed
		var newX = x + safeZone.dragOffsetX;
		// Clamp within screen
		var minX = safeZone.width / 2;
		var maxX = 2048 - safeZone.width / 2;
		if (newX < minX) newX = minX;
		if (newX > maxX) newX = maxX;
		safeZone.x = newX;
	}
}
game.move = handleMove;
// On down: check if touching an NPC or safe zone
game.down = function (x, y, obj) {
	// Find topmost NPC under pointer
	var found = false;
	for (var i = npcs.length - 1; i >= 0; i--) {
		var npc = npcs[i];
		// Simple hit test (circle)
		var dx = x - npc.x;
		var dy = y - npc.y;
		var r = 60;
		if (dx * dx + dy * dy < r * r && !npc.rescued) {
			dragNode = npc;
			npc.down(x, y, obj);
			found = true;
			break;
		}
	}
	// If not on NPC, check if on safe zone (ellipse hit test)
	if (!found) {
		var dxz = x - safeZone.x;
		var dyz = y - safeZone.y;
		// Ellipse: (dx/a)^2 + (dy/b)^2 <= 1
		var a = safeZone.width / 2;
		var b = safeZone.height / 2;
		if (dxz * dxz / (a * a) + dyz * dyz / (b * b) <= 1) {
			safeZone.isDragging = true;
			safeZone.dragOffsetX = safeZone.x - x;
		}
	}
};
// On up: release drag
game.up = function (x, y, obj) {
	if (dragNode) {
		dragNode.up(x, y, obj);
		dragNode = null;
	}
	if (safeZone.isDragging) {
		safeZone.isDragging = false;
	}
};
// Main game update loop
game.update = function () {
	// Spawn NPCs at interval
	if (LK.ticks % spawnInterval === 0) {
		spawnNPC();
	}
	// Update all NPCs
	for (var i = npcs.length - 1; i >= 0; i--) {
		var npc = npcs[i];
		// If being dragged, follow finger (handled in move)
		// If not, update position (handled in class update)
		// Check if rescued (intersecting safe zone)
		var isIntersecting = !npc.rescued && npc.intersects(safeZone);
		if (!npc.lastIntersecting && isIntersecting) {
			rescueNPC(npc);
		}
		npc.lastIntersecting = isIntersecting;
		// If NPC falls below screen, play sound and game over
		if (!npc.rescued && npc.y > 2732 + 80) {
			LK.getSound('5').play();
			triggerGameOver();
			return;
		}
	}
	// Update all sharks and check for shark-NPC collision
	for (var s = 0; s < sharks.length; s++) {
		var shark = sharks[s];
		shark.update();
		// Check collision with NPCs
		for (var n = npcs.length - 1; n >= 0; n--) {
			var npc = npcs[n];
			if (!npc.rescued && shark.intersects(npc)) {
				// Remove NPC, play sound, and respawn shark
				LK.getSound('5').play();
				removeNPC(npc);
				shark.respawn();
				// Optional: flash shark or screen
				LK.effects.flashObject(shark, 0xff0000, 300);
				break;
			}
		}
	}
	// --- Safe zone left edge detection and sound effect ---
	if (typeof safeZone.lastX === "undefined") safeZone.lastX = safeZone.x;
	var leftEdge = safeZone.width / 2;
	if (safeZone.lastX > leftEdge && safeZone.x <= leftEdge) {
		// Play sound '5' when safe zone reaches the left edge
		LK.getSound('5').play();
	}
	safeZone.lastX = safeZone.x;
};
// Initial spawn
for (var i = 0; i < 2; i++) {
	spawnNPC();
}
// Spawn sharks (e.g. 2 sharks)
for (var i = 0; i < 2; i++) {
	var shark = new Shark();
	sharks.push(shark);
	game.addChild(shark);
}
score = 0;
LK.setScore(score);
scoreTxt.setText(score);

===================================================================
--- original.js
+++ change.js
@@ -93,8 +93,100 @@
 	label.y = 0;
 	self.addChild(label);
 	return self;
 });
+// Shark class: spawns in specific regions and chases nearest NPC
+var Shark = Container.expand(function () {
+	var self = Container.call(this);
+	// Attach shark asset (use 'itler' for now, or replace with shark asset if available)
+	var sharkAsset = self.attachAsset('itler', {
+		width: 180,
+		height: 100,
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	// Shark speed
+	self.speed = 4 + Math.random() * 1.5;
+	// Target NPC (to chase)
+	self.target = null;
+	// For region logic
+	self.region = null;
+	// For direction flip
+	self.lastDir = 1;
+	// Called every tick
+	self.update = function () {
+		// Find nearest NPC to chase
+		if (npcs && npcs.length > 0) {
+			var minDist = 99999;
+			var closest = null;
+			for (var i = 0; i < npcs.length; i++) {
+				var npc = npcs[i];
+				if (npc.rescued) continue;
+				var dx = npc.x - self.x;
+				var dy = npc.y - self.y;
+				var dist = dx * dx + dy * dy;
+				if (dist < minDist) {
+					minDist = dist;
+					closest = npc;
+				}
+			}
+			self.target = closest;
+		} else {
+			self.target = null;
+		}
+		// Move toward target NPC
+		if (self.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) {
+				var moveX = dx / dist * self.speed;
+				var moveY = dy / dist * self.speed * 0.7; // Slightly less vertical
+				self.x += moveX;
+				self.y += moveY;
+				// Flip sprite if needed
+				if (moveX < 0 && self.lastDir !== -1) {
+					sharkAsset.scaleX = -1;
+					self.lastDir = -1;
+				} else if (moveX > 0 && self.lastDir !== 1) {
+					sharkAsset.scaleX = 1;
+					self.lastDir = 1;
+				}
+			}
+		}
+		// Clamp inside region
+		if (self.region) {
+			if (self.x < self.region.min) self.x = self.region.min;
+			if (self.x > self.region.max) self.x = self.region.max;
+		}
+		// If shark goes below screen, respawn at top
+		if (self.y > 2732 + 100) {
+			self.respawn();
+		}
+	};
+	// Respawn at top in a region
+	self.respawn = function () {
+		// Pick a region
+		var sharkRegions = [{
+			min: 300,
+			max: 600
+		}, {
+			min: 900,
+			max: 1200
+		}, {
+			min: 1500,
+			max: 1800
+		}];
+		var region = sharkRegions[Math.floor(Math.random() * sharkRegions.length)];
+		self.region = region;
+		self.x = region.min + Math.random() * (region.max - region.min);
+		self.y = -100 - Math.random() * 100;
+		self.speed = 4 + Math.random() * 1.5;
+	};
+	// Initial spawn
+	self.respawn();
+	return self;
+});
 
 /**** 
 * Initialize Game
 ****/ 
@@ -107,8 +199,9 @@
 ****/ 
 // Tween plugin for animations
 // Game variables
 var npcs = []; // All NPCs on screen
+var sharks = []; // All sharks on screen
 var safeZone; // The safe zone object
 var score = 0;
 var scoreTxt;
 var spawnInterval = 180; // Initial spawn interval (frames)
@@ -288,8 +381,26 @@
 			triggerGameOver();
 			return;
 		}
 	}
+	// Update all sharks and check for shark-NPC collision
+	for (var s = 0; s < sharks.length; s++) {
+		var shark = sharks[s];
+		shark.update();
+		// Check collision with NPCs
+		for (var n = npcs.length - 1; n >= 0; n--) {
+			var npc = npcs[n];
+			if (!npc.rescued && shark.intersects(npc)) {
+				// Remove NPC, play sound, and respawn shark
+				LK.getSound('5').play();
+				removeNPC(npc);
+				shark.respawn();
+				// Optional: flash shark or screen
+				LK.effects.flashObject(shark, 0xff0000, 300);
+				break;
+			}
+		}
+	}
 	// --- Safe zone left edge detection and sound effect ---
 	if (typeof safeZone.lastX === "undefined") safeZone.lastX = safeZone.x;
 	var leftEdge = safeZone.width / 2;
 	if (safeZone.lastX > leftEdge && safeZone.x <= leftEdge) {
@@ -301,7 +412,13 @@
 // Initial spawn
 for (var i = 0; i < 2; i++) {
 	spawnNPC();
 }
+// Spawn sharks (e.g. 2 sharks)
+for (var i = 0; i < 2; i++) {
+	var shark = new Shark();
+	sharks.push(shark);
+	game.addChild(shark);
+}
 score = 0;
 LK.setScore(score);
 scoreTxt.setText(score);
\ No newline at end of file