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

/**** 
* Classes
****/ 
// Ghost class
var Ghost = Container.expand(function () {
	var self = Container.call(this);
	self.colorId = 'ghost_red'; // default, will be set on init
	self.frightened = false;
	self.dir = {
		x: 0,
		y: 0
	};
	self.speed = 7;
	self.gridX = 0;
	self.gridY = 0;
	self.scatterTarget = {
		x: 0,
		y: 0
	}; // for future AI
	self.mode = 'chase'; // 'chase', 'scatter', 'frightened'
	self.frightTimer = 0;
	self.attach = function (colorId) {
		self.colorId = colorId;
		self.removeChildren();
		var ghostGfx = self.attachAsset(colorId, {
			anchorX: 0.5,
			anchorY: 0.5
		});
	};
	self.setFrightened = function (on) {
		self.frightened = on;
		self.removeChildren();
		if (on) {
			self.attachAsset('ghost_fright', {
				anchorX: 0.5,
				anchorY: 0.5
			});
		} else {
			self.attachAsset(self.colorId, {
				anchorX: 0.5,
				anchorY: 0.5
			});
		}
	};
	self.update = function () {
		self.x += self.dir.x * self.speed;
		self.y += self.dir.y * self.speed;
	};
	return self;
});
// Pacman class
var Pacman = Container.expand(function () {
	var self = Container.call(this);
	var pacmanGfx = self.attachAsset('pacman', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = pacmanGfx.width / 2;
	self.dir = {
		x: 1,
		y: 0
	}; // Start moving right
	self.nextDir = {
		x: 1,
		y: 0
	};
	self.speed = 8; // pixels per tick
	self.gridX = 0;
	self.gridY = 0;
	self.moving = true;
	self.update = function () {
		if (!self.moving) return;
		// Move Pacman
		self.x += self.dir.x * self.speed;
		self.y += self.dir.y * self.speed;
	};
	return self;
});
// Pellet class
var Pellet = Container.expand(function () {
	var self = Container.call(this);
	self.isPower = false;
	self.attach = function (isPower) {
		self.isPower = isPower;
		self.removeChildren();
		if (isPower) {
			self.attachAsset('powerpellet', {
				anchorX: 0.5,
				anchorY: 0.5
			});
		} else {
			self.attachAsset('pellet', {
				anchorX: 0.5,
				anchorY: 0.5
			});
		}
	};
	return self;
});
// Wall class
var Wall = Container.expand(function () {
	var self = Container.call(this);
	self.attachAsset('wall', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000
});

/**** 
* Game Code
****/ 
// 19x23 grid (classic Pacman aspect, fits 2048x2732 well)
// 0: empty, 1: wall, 2: pellet, 3: power pellet
// --- Maze Layout ---
// Pacman (yellow circle)
// Pellet (small white dot)
// Power Pellet (bigger blue dot)
// Wall (blue box)
// Ghosts (four colors)
// Frightened ghost (white)
var MAZE_ROWS = 23;
var MAZE_COLS = 19;
var CELL_SIZE = 112; // 19*112=2128, 23*112=2576, fits in 2048x2732 with margin
var MAZE_OFFSET_X = (2048 - MAZE_COLS * CELL_SIZE) / 2;
var MAZE_OFFSET_Y = (2732 - MAZE_ROWS * CELL_SIZE) / 2 + 40;
// Simple Pacman-like maze (minimal, for MVP)
var MAZE = [
// Open up top center (row 0, col 9)
[1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1], [1, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 1], [1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1], [1, 3, 1, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 1, 2, 1, 3, 1, 1], [1, 2, 1, 2, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 2, 1, 2, 2, 1], [1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1], [1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1], [1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1], [1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1],
// Open up middle (row 9, col 9,10,11)
[1, 2, 2, 2, 2, 2, 2, 1, 0, 0, 0, 1, 2, 2, 2, 2, 2, 2, 1], [1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1],
// Open up center of row 11 (row 11, col 9)
[1, 2, 2, 2, 2, 2, 2, 2, 2, 0, 2, 2, 2, 2, 2, 2, 2, 2, 1], [1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1], [1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1], [1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1],
// Open up middle (row 15, col 9)
[1, 3, 2, 2, 2, 2, 2, 2, 2, 0, 2, 2, 2, 2, 2, 2, 2, 3, 1],
// Open up bottom center (row 16, col 9)
[1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1], [1, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 1], [1, 2, 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 2, 2, 1], [1, 2, 1, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 1, 2, 1, 2, 2, 1], [1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1],
// Open up bottom center (row 21, col 9)
[1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1],
// Bottom row (row 22) remains closed for border
[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]];
// --- Game State ---
var pellets = [];
var walls = [];
var ghosts = [];
var pacman = null;
var score = 0;
var pelletsLeft = 0;
var frightTicks = 0;
var frightActive = false;
var frightDuration = 360; // 6 seconds at 60fps
var swipeStart = null;
var dragNode = null;
var lastGameOver = false;
// --- Score Display ---
var scoreTxt = new Text2('0', {
	size: 120,
	fill: "#fff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// --- Maze Build ---
function buildMaze() {
	// Clear previous
	for (var i = 0; i < pellets.length; ++i) pellets[i].destroy();
	for (var i = 0; i < walls.length; ++i) walls[i].destroy();
	pellets = [];
	walls = [];
	pelletsLeft = 0;
	for (var row = 0; row < MAZE_ROWS; ++row) {
		for (var col = 0; col < MAZE_COLS; ++col) {
			var cell = MAZE[row][col];
			var x = MAZE_OFFSET_X + col * CELL_SIZE + CELL_SIZE / 2;
			var y = MAZE_OFFSET_Y + row * CELL_SIZE + CELL_SIZE / 2;
			if (cell === 1) {
				var wall = new Wall();
				wall.x = x;
				wall.y = y;
				game.addChild(wall);
				walls.push(wall);
			} else if (cell === 2 || cell === 3) {
				var pellet = new Pellet();
				pellet.x = x;
				pellet.y = y;
				pellet.attach(cell === 3);
				game.addChild(pellet);
				pellets.push(pellet);
				pelletsLeft++;
			}
		}
	}
}
// --- Pacman Init ---
function spawnPacman() {
	if (pacman) pacman.destroy();
	pacman = new Pacman();
	// Start position: center of maze, row 15, col 9
	pacman.gridX = 9;
	pacman.gridY = 15;
	pacman.x = MAZE_OFFSET_X + pacman.gridX * CELL_SIZE + CELL_SIZE / 2;
	pacman.y = MAZE_OFFSET_Y + pacman.gridY * CELL_SIZE + CELL_SIZE / 2;
	pacman.dir = {
		x: 1,
		y: 0
	};
	pacman.nextDir = {
		x: 1,
		y: 0
	};
	pacman.moving = true;
	game.addChild(pacman);
}
// --- Ghosts Init ---
function spawnGhosts() {
	// Remove old ghosts
	for (var i = 0; i < ghosts.length; ++i) ghosts[i].destroy();
	ghosts = [];
	// Four ghosts, different colors, start in center
	var ghostColors = ['ghost_red', 'ghost_pink', 'ghost_blue', 'ghost_orange'];
	var ghostStarts = [{
		col: 9,
		row: 11
	}, {
		col: 8,
		row: 11
	}, {
		col: 10,
		row: 11
	}, {
		col: 9,
		row: 12
	}];
	for (var i = 0; i < 4; ++i) {
		var ghost = new Ghost();
		ghost.attach(ghostColors[i]);
		ghost.gridX = ghostStarts[i].col;
		ghost.gridY = ghostStarts[i].row;
		ghost.x = MAZE_OFFSET_X + ghost.gridX * CELL_SIZE + CELL_SIZE / 2;
		ghost.y = MAZE_OFFSET_Y + ghost.gridY * CELL_SIZE + CELL_SIZE / 2;
		// Initial direction: up or left/right
		if (i === 0) ghost.dir = {
			x: 0,
			y: -1
		};else if (i === 1) ghost.dir = {
			x: -1,
			y: 0
		};else if (i === 2) ghost.dir = {
			x: 1,
			y: 0
		};else ghost.dir = {
			x: 0,
			y: 1
		};
		ghost.frightened = false;
		ghosts.push(ghost);
		game.addChild(ghost);
	}
}
// --- Utility: Grid <-> Pixel ---
function posToGrid(x, y) {
	var col = Math.floor((x - MAZE_OFFSET_X) / CELL_SIZE);
	var row = Math.floor((y - MAZE_OFFSET_Y) / CELL_SIZE);
	return {
		col: col,
		row: row
	};
}
function gridToPos(col, row) {
	return {
		x: MAZE_OFFSET_X + col * CELL_SIZE + CELL_SIZE / 2,
		y: MAZE_OFFSET_Y + row * CELL_SIZE + CELL_SIZE / 2
	};
}
function isWall(col, row) {
	if (col < 0 || col >= MAZE_COLS || row < 0 || row >= MAZE_ROWS) return true;
	return MAZE[row][col] === 1;
}
// --- Pacman Movement & Input ---
function canMove(col, row, dir) {
	var nextCol = col + dir.x;
	var nextRow = row + dir.y;
	return !isWall(nextCol, nextRow);
}
function updatePacmanDirection() {
	var grid = posToGrid(pacman.x, pacman.y);
	// Snap to center of cell
	var center = gridToPos(grid.col, grid.row);
	var dx = Math.abs(pacman.x - center.x);
	var dy = Math.abs(pacman.y - center.y);
	if (dx < 4 && dy < 4) {
		// At center, can change direction
		if (canMove(grid.col, grid.row, pacman.nextDir)) {
			pacman.dir = {
				x: pacman.nextDir.x,
				y: pacman.nextDir.y
			};
		}
		// If can't move in current dir, stop
		if (!canMove(grid.col, grid.row, pacman.dir)) {
			pacman.moving = false;
		} else {
			pacman.moving = true;
		}
		// Snap to center
		pacman.x = center.x;
		pacman.y = center.y;
	}
}
// --- Ghost Movement (Random for MVP, smarter later) ---
function getValidGhostDirs(ghost) {
	var grid = posToGrid(ghost.x, ghost.y);
	var dirs = [{
		x: 1,
		y: 0
	}, {
		x: -1,
		y: 0
	}, {
		x: 0,
		y: 1
	}, {
		x: 0,
		y: -1
	}];
	var valid = [];
	for (var i = 0; i < dirs.length; ++i) {
		var d = dirs[i];
		// Don't reverse direction
		if (ghost.dir.x === -d.x && ghost.dir.y === -d.y) continue;
		if (!isWall(grid.col + d.x, grid.row + d.y)) valid.push(d);
	}
	return valid;
}
function updateGhostDirection(ghost) {
	var grid = posToGrid(ghost.x, ghost.y);
	var center = gridToPos(grid.col, grid.row);
	var dx = Math.abs(ghost.x - center.x);
	var dy = Math.abs(ghost.y - center.y);
	if (dx < 4 && dy < 4) {
		// At center, pick new direction
		var valid = getValidGhostDirs(ghost);
		if (valid.length === 0) {
			ghost.dir = {
				x: -ghost.dir.x,
				y: -ghost.dir.y
			};
		} else {
			// MVP: random direction
			var idx = Math.floor(Math.random() * valid.length);
			ghost.dir = {
				x: valid[idx].x,
				y: valid[idx].y
			};
		}
		// Snap to center
		ghost.x = center.x;
		ghost.y = center.y;
	}
}
// --- Pellet Eating ---
function checkPelletEat() {
	for (var i = pellets.length - 1; i >= 0; --i) {
		var pellet = pellets[i];
		var dx = pacman.x - pellet.x;
		var dy = pacman.y - pellet.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist < 48) {
			// Eat pellet
			if (pellet.isPower) {
				frightTicks = frightDuration;
				frightActive = true;
				for (var g = 0; g < ghosts.length; ++g) {
					ghosts[g].setFrightened(true);
				}
			}
			pellet.destroy();
			pellets.splice(i, 1);
			pelletsLeft--;
			score += pellet.isPower ? 50 : 10;
			scoreTxt.setText(score);
			LK.setScore(score);
			if (pelletsLeft === 0) {
				LK.showYouWin();
			}
		}
	}
}
// --- Ghost Collisions ---
function checkGhostCollisions() {
	for (var i = 0; i < ghosts.length; ++i) {
		var ghost = ghosts[i];
		var dx = pacman.x - ghost.x;
		var dy = pacman.y - ghost.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist < 60) {
			if (ghost.frightened) {
				// Eat ghost
				ghost.setFrightened(false);
				// Send ghost to home
				var home = gridToPos(9, 11);
				ghost.x = home.x;
				ghost.y = home.y;
				ghost.dir = {
					x: 0,
					y: -1
				};
				score += 200;
				scoreTxt.setText(score);
				LK.setScore(score);
			} else {
				// Pacman dies
				if (!lastGameOver) {
					LK.effects.flashScreen(0xff0000, 1000);
					LK.showGameOver();
					lastGameOver = true;
				}
			}
		}
	}
}
// --- Frightened Mode Timer ---
function updateFrightened() {
	if (frightActive) {
		frightTicks--;
		if (frightTicks <= 0) {
			frightActive = false;
			for (var g = 0; g < ghosts.length; ++g) {
				ghosts[g].setFrightened(false);
			}
		}
	}
}
// --- Input: Swipe to set direction ---
function getSwipeDir(start, end) {
	var dx = end.x - start.x;
	var dy = end.y - start.y;
	if (Math.abs(dx) > Math.abs(dy)) {
		if (dx > 32) return {
			x: 1,
			y: 0
		};
		if (dx < -32) return {
			x: -1,
			y: 0
		};
	} else {
		if (dy > 32) return {
			x: 0,
			y: 1
		};
		if (dy < -32) return {
			x: 0,
			y: -1
		};
	}
	return null;
}
game.down = function (x, y, obj) {
	swipeStart = {
		x: x,
		y: y
	};
	dragNode = pacman;
};
game.move = function (x, y, obj) {
	if (!swipeStart) return;
	var swipeEnd = {
		x: x,
		y: y
	};
	var dir = getSwipeDir(swipeStart, swipeEnd);
	if (dir) {
		pacman.nextDir = dir;
		swipeStart = null;
	}
};
game.up = function (x, y, obj) {
	swipeStart = null;
	dragNode = null;
};
// --- Game Update Loop ---
game.update = function () {
	if (!pacman) return;
	lastGameOver = false;
	updatePacmanDirection();
	pacman.update();
	for (var i = 0; i < ghosts.length; ++i) {
		updateGhostDirection(ghosts[i]);
		ghosts[i].update();
	}
	checkPelletEat();
	checkGhostCollisions();
	updateFrightened();
};
// --- Game Start ---
function startGame() {
	score = 0;
	LK.setScore(0);
	scoreTxt.setText('0');
	buildMaze();
	spawnPacman();
	spawnGhosts();
	frightTicks = 0;
	frightActive = false;
	lastGameOver = false;
}
startGame();