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

/**** 
* Classes
****/ 
// Bus (player) class
var Bus = Container.expand(function () {
	var self = Container.call(this);
	var busAsset = self.attachAsset('bus', {
		anchorX: 0.5,
		anchorY: 1
	});
	// For touch drag
	self.dragging = false;
	self.dragOffsetY = 0;
	// Called every tick
	self.update = function () {
		// Clamp bus to road (vertical bounds)
		if (self.y < 400) self.y = 400;
		if (self.y > 2200) self.y = 2200;
	};
	// Touch down on bus
	self.down = function (x, y, obj) {
		self.dragging = true;
		self.dragOffsetY = y - self.y;
	};
	// Touch up on bus
	self.up = function (x, y, obj) {
		self.dragging = false;
	};
	return self;
});
// Bus Station class
var BusStation = Container.expand(function () {
	var self = Container.call(this);
	var stationAsset = self.attachAsset('station', {
		anchorX: 0.5,
		anchorY: 1
	});
	// List of travelers at this station
	self.travelers = [];
	// Generate random number of travelers (1-10)
	var numTravelers = 1 + Math.floor(Math.random() * 10);
	// Place travelers in a row directly above (for above street) or below (for below street) the station
	var travelerYOffset = self.y < streetBgY ? -70 : 70;
	for (var i = 0; i < numTravelers; i++) {
		var traveler = new Traveler();
		traveler.station = self;
		// Random leave time: 2-6 seconds from now
		traveler.leaveTick = LK.ticks + 120 + Math.floor(Math.random() * 240);
		// Position travelers spaced out in a straight line
		traveler.x = (i - (numTravelers - 1) / 2) * 70;
		traveler.y = travelerYOffset;
		self.addChild(traveler);
		self.travelers.push(traveler);
	}
	// Remove traveler from this station
	self.removeTraveler = function (traveler) {
		for (var i = 0; i < self.travelers.length; i++) {
			if (self.travelers[i] === traveler) {
				self.travelers.splice(i, 1);
				break;
			}
		}
	};
	// Called every tick
	self.update = function () {
		// Remove station if no travelers left and bus has passed
		if (self.travelers.length === 0 && self.x + self.width / 2 < bus.x - 200) {
			self.destroy();
			for (var i = 0; i < stations.length; i++) {
				if (stations[i] === self) {
					stations.splice(i, 1);
					break;
				}
			}
		}
	};
	return self;
});
// Traveler class
var Traveler = Container.expand(function () {
	var self = Container.call(this);
	var travelerAsset = self.attachAsset('traveler', {
		anchorX: 0.5,
		anchorY: 1
	});
	// Reference to the station this traveler belongs to
	self.station = null;
	// Whether this traveler is still waiting at the station
	self.waiting = true;
	// Time (in ticks) until this traveler leaves
	self.leaveTick = 0;
	// Called every tick
	self.update = function () {
		// If not waiting, do nothing
		if (!self.waiting) return;
		// Travelers no longer leave by themselves
		// Remove the leave-tick logic entirely
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x222222
});

/**** 
* Game Code
****/ 
// Draw street background as a wide gray rectangle (repeatable)
var streetBgWidth = 900;
var streetBgHeight = 400;
var streetBgY = 1500;
var streetBgs = [];
for (var i = 0; i < 3; i++) {
	var streetBg = LK.getAsset('streetBg', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 2048 / 2 + (i - 1) * streetBgWidth,
		y: streetBgY
	});
	game.addChild(streetBg);
	streetBgs.push(streetBg);
}
// Traveler
// Bus station
// Bus (player vehicle)
// Game world scroll variables
var scrollX = 0; // How far the world has scrolled right
var scrollSpeed = 10; // Pixels per tick
// Bus (player)
var bus = new Bus();
game.addChild(bus);
bus.x = 400;
bus.y = 1500;
// List of stations in the world
var stations = [];
// GUI: Score (number of travelers picked up)
var score = 0;
var scoreTxt = new Text2('0', {
	size: 120,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// For dragging bus
var dragBus = false;
// Generate the first station
function spawnStation(minX) {
	// Alternate station placement: above or below the street, always aligned horizontally
	var station = new BusStation();
	var streetCenterY = streetBgY;
	var offsetY = 260; // distance from street center to place stations
	// Alternate up/down for each station
	if (stations.length % 2 === 0) {
		station.y = streetCenterY - streetBgHeight / 2 - 40; // above street
	} else {
		station.y = streetCenterY + streetBgHeight / 2 + 40; // below street
	}
	// Place station at minX + random offset (900-1400 px ahead) for more space
	station.x = minX + 900 + Math.floor(Math.random() * 500);
	game.addChild(station);
	stations.push(station);
}
// Initial stations
var lastStationX = 1200;
for (var i = 0; i < 3; i++) {
	spawnStation(lastStationX);
	lastStationX = stations[stations.length - 1].x;
}
// Move handler for dragging bus
function handleMove(x, y, obj) {
	// Only drag if started on bus
	if (bus.dragging) {
		bus.y = y - bus.dragOffsetY;
	}
}
game.move = handleMove;
// Down handler: start drag if on bus, or start holding for rightward movement
var holdingRight = false;
game.down = function (x, y, obj) {
	// Convert to bus local coordinates
	var local = bus.toLocal(game.toGlobal({
		x: x,
		y: y
	}));
	// If within bus bounds, start drag
	if (local.x > -bus.width / 2 && local.x < bus.width / 2 && local.y > -bus.height && local.y < 0) {
		bus.dragging = true;
		bus.dragOffsetY = y - bus.y;
	} else {
		// Start holding for rightward movement
		holdingRight = true;
	}
};
// Up handler: stop drag and stop holding rightward movement
game.up = function (x, y, obj) {
	bus.dragging = false;
	holdingRight = false;
};
// Main game update loop
game.update = function () {
	// Move bus/world right if holding
	if (typeof holdingRight !== "undefined" && holdingRight) {
		var moveAmount = scrollSpeed;
		// Instead of moving the bus, move the world and keep bus centered
		scrollX += moveAmount;
		for (var i = 0; i < stations.length; i++) {
			stations[i].x -= moveAmount;
		}
		// Move and repeat street backgrounds
		for (var i = 0; i < streetBgs.length; i++) {
			streetBgs[i].x -= moveAmount;
			// If streetBg is fully off the left, move it to the right end
			if (streetBgs[i].x < -streetBgWidth / 2) {
				// Find the rightmost streetBg
				var maxX = streetBgs[0].x;
				for (var j = 1; j < streetBgs.length; j++) {
					if (streetBgs[j].x > maxX) maxX = streetBgs[j].x;
				}
				streetBgs[i].x = maxX + streetBgWidth;
			}
		}
	}
	// Always keep bus in the center of the screen horizontally
	bus.x = 2048 / 2;
	// Move all stations and their travelers (no auto scroll)
	for (var i = 0; i < stations.length; i++) {
		var station = stations[i];
		// No station.x -= scrollSpeed;
		station.update();
		for (var j = 0; j < station.travelers.length; j++) {
			station.travelers[j].update();
		}
	}
	// Update bus
	bus.update();
	// Spawn new station if needed (always keep at least 3 ahead)
	if (stations.length === 0 || stations[stations.length - 1].x < 2048 + 600) {
		var minX = stations.length === 0 ? bus.x + 800 : stations[stations.length - 1].x;
		spawnStation(minX);
	}
	// Check for bus-traveler interaction (pickup)
	var showTakeBtn = false;
	var takeBtnStation = null;
	for (var i = 0; i < stations.length; i++) {
		var station = stations[i];
		// Only check if station is close to bus
		if (Math.abs(station.x - bus.x) < 180) {
			// If there are waiting travelers, show the button
			var hasWaiting = false;
			for (var j = 0; j < station.travelers.length; j++) {
				if (station.travelers[j].waiting) {
					hasWaiting = true;
					break;
				}
			}
			if (hasWaiting) {
				showTakeBtn = true;
				takeBtnStation = station;
			}
		}
	}
	// Handle Take Travelers button
	if (!game.takeBtn) {
		// Create button if not exists
		game.takeBtn = new Text2("Take Travelers", {
			size: 90,
			fill: 0xFFFFFF,
			background: 0x2D8CF0
		});
		game.takeBtn.anchor.set(0.5, 0.5);
		game.takeBtn.visible = false;
		game.takeBtn.interactive = true;
		game.takeBtn.buttonMode = true;
		game.takeBtn.on('down', function () {
			if (game.takeBtnStation) {
				// Pick up all waiting travelers at this station
				var station = game.takeBtnStation;
				for (var j = station.travelers.length - 1; j >= 0; j--) {
					var traveler = station.travelers[j];
					if (traveler.waiting && Math.abs(traveler.y + station.y - bus.y) < 80) {
						traveler.waiting = false;
						station.removeTraveler(traveler);
						// Animate pickup (move to bus, fade out)
						tween(traveler, {
							x: bus.x - station.x,
							y: bus.y - station.y - 40,
							alpha: 0
						}, {
							duration: 400,
							easing: tween.easeIn,
							onFinish: function onFinish() {
								traveler.destroy();
							}
						});
						// Update score
						score += 1;
						scoreTxt.setText(score);
					}
				}
			}
		});
		LK.gui.bottom.addChild(game.takeBtn);
	}
	if (showTakeBtn && takeBtnStation) {
		game.takeBtn.visible = true;
		game.takeBtnStation = takeBtnStation;
		// Place button at bottom center, but higher up (e.g. 250px from bottom)
		game.takeBtn.x = LK.gui.bottom.width / 2;
		game.takeBtn.y = -250;
	} else {
		game.takeBtn.visible = false;
		game.takeBtnStation = null;
	}
};