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

/**** 
* Classes
****/ 
/** 
* BeatCell
* Responsibility: To model the state of a single cell on the beat grid. It no longer
* handles its own graphics updates directly, this is delegated to the GridService.
*/ 
var BeatCell = Container.expand(function (row) {
	var self = Container.call(this);
	self.active = false;
	self.row = row; // Know its row for external logic to interpret
	// Initialize with appropriate beat tile at 20% transparency
	var assetId = 'cell';
	if (row === 0) {
		assetId = 'cellActive';
	} else if (row === 1) {
		assetId = 'cellLeft';
	} else if (row === 2) {
		assetId = 'cellRight';
	} else if (row === 3) {
		assetId = 'cellDown';
	}
	self.gfx = self.attachAsset(assetId, {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0.1
	});
	self.toggle = function () {
		self.active = !self.active;
	};
	self.setActive = function (val) {
		if (self.active !== val) {
			self.toggle();
		}
	};
	// The `down` event is removed and is now handled by the central InputService.
	return self;
});
/** 
* Coin
* Responsibility: Collectible coin that can be picked up by the hero
*/ 
var Coin = Container.expand(function () {
	var self = Container.call(this);
	self.gfx = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.collected = false;
	// Add wobble animation with random offset
	self.wobbleOffset = Math.random() * Math.PI * 2; // Random starting phase
	self.wobbleSpeed = 0.0015 + Math.random() * 0.001; // Slightly varied speed
	self.wobbleAmount = 0.05 + Math.random() * 0.02; // 5-7 degrees in radians
	self.wobbleDirection = Math.random() > 0.5 ? 1 : -1; // Random initial direction
	self.baseRotation = 0;
	self.update = function () {
		if (!self.collected) {
			// Calculate wobble using sine wave
			var time = Date.now() * self.wobbleSpeed + self.wobbleOffset;
			self.gfx.rotation = self.baseRotation + Math.sin(time) * self.wobbleAmount * self.wobbleDirection;
		}
	};
	self.collect = function () {
		if (!self.collected) {
			self.collected = true;
			tween(self, {
				scaleX: 1.5,
				scaleY: 1.5,
				alpha: 0
			}, {
				duration: 300,
				easing: tween.cubicOut,
				onComplete: function onComplete() {
					self.destroy();
				}
			});
		}
	};
	return self;
});
/** 
* Enemy
* Responsibility: Static enemy that causes game over when touched
*/ 
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	self.gfx = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	return self;
});
/** 
* AntiCheatService
* Responsibility: Manages disabling random cells from each beat layer each round
*/ 
/** 
* Hero
* Responsibility: To model the player character. It manages its own state and animations,
* but no longer triggers its own sound effects.
*/ 
var Hero = Container.expand(function () {
	var self = Container.call(this);
	self.gfx = self.attachAsset('hero', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.currentCol = 0;
	self.gridRow = GameConstants.CHAR_ROW;
	// Track last direction and up-walk alternation
	self.lastDirection = "down"; // "left", "right", "up", "down"
	self.lastEat = false;
	self.upWalkAlt = false; // toggles for up-walk alternation
	// Helper to set hero frame based on direction and eating state
	self.setFrame = function (direction, isEating, isUpWalkAlt) {
		// Only update if changed
		var assetId = "hero";
		if (direction === "left") {
			assetId = isEating ? "Hero_Left_Eat" : "Hero_Left_Walk";
		} else if (direction === "right") {
			assetId = isEating ? "Hero_Right_Eat" : "Hero_Right_Walk";
		} else if (direction === "up") {
			assetId = isUpWalkAlt ? "Hero_Back_Walk_2" : "Hero_Back_Walk";
		} else if (direction === "down") {
			assetId = "hero";
		}
		// Only swap if different
		if (!self.gfx.assetId || self.gfx.assetId !== assetId) {
			if (self.gfx) {
				self.gfx.destroy();
			}
			self.gfx = self.attachAsset(assetId, {
				anchorX: 0.5,
				anchorY: 0.5
			});
			self.gfx.assetId = assetId; // Track for future checks
		}
		self.lastDirection = direction;
		self.lastEat = isEating;
		if (direction === "up") {
			self.upWalkAlt = isUpWalkAlt;
		}
	};
	self.moveTo = function (nx, ny, duration) {
		tween(self, {
			x: nx,
			y: ny
		}, {
			duration: duration || 180,
			easing: tween.cubicOut
		});
	};
	return self;
});
/** 
* Projectile
* Responsibility: Projectile shot by hero, accelerates toward a target coin and collects it on hit
*/ 
var Projectile = Container.expand(function (targetCoin, onCollectCallback) {
	var self = Container.call(this);
	self.gfx = self.attachAsset('Projectile', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.targetCoin = targetCoin;
	self.onCollectCallback = onCollectCallback;
	self.speed = 10; // initial speed
	self.maxSpeed = 50;
	self.acceleration = 2;
	self.lastX = self.x;
	self.lastY = self.y;
	self.update = function () {
		if (!self.targetCoin || self.targetCoin.collected) {
			self.destroy();
			return;
		}
		// Calculate direction to target
		var dx = self.targetCoin.x - self.x;
		var dy = self.targetCoin.y - self.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist < 1) {
			dist = 1;
		}
		// Accelerate
		if (self.speed < self.maxSpeed) {
			self.speed += self.acceleration;
			if (self.speed > self.maxSpeed) {
				self.speed = self.maxSpeed;
			}
		}
		// Move towards target
		var moveX = dx / dist * self.speed;
		var moveY = dy / dist * self.speed;
		self.x += moveX;
		self.y += moveY;
		// Check collision (use bounding box for simplicity)
		if (!self.targetCoin.collected && Math.abs(self.x - self.targetCoin.x) < 40 && Math.abs(self.y - self.targetCoin.y) < 40) {
			// Collect the coin
			if (typeof self.targetCoin.collect === "function") {
				self.targetCoin.collect();
				// **** THIS IS THE NEW PART ****
				if (typeof self.onCollectCallback === "function") {
					self.onCollectCallback();
				}
			}
			self.destroy();
		}
		self.lastX = self.x;
		self.lastY = self.y;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
/************************* 
* SERVICES
*************************/ 
/** 
* AudioService
* Responsibility: To handle all requests to play sounds and music.
*/ 
/************************* 
* INITIALIZE & RUN GAME
*************************/ 
// 1. Create Game Instance
var game = new LK.Game({
	backgroundColor: 0x181830
});

/**** 
* Game Code
****/ 
/** 
* AntiCheatService
* Responsibility: Manages disabling random cells from each beat layer each round
*/ 
/** 
* GameConstants
* Responsibility: To hold all static configuration and magic numbers in one place
* for easy tuning and maintenance.
*/ 
/************************* 
* GAME CONFIGURATION
*************************/ 
// Plugins (Unchanged)
// Assets (Unchanged)
/************************* 
* ASSETS & PLUGINS
*************************/ 
// 2. Instantiate All Services
/************************* 
* CORE GAME OBJECTS
*************************/ 
/** 
* GameGrid
* Responsibility: Centralizes the entire grid (playable + beat area) into a single class.
* Provides accessors for both the playable area and the beat grid, and manages their state.
*/ 
function AntiCheatService(gridService, gameGrid) {
	this.gridService = gridService;
	this.gameGrid = gameGrid;
	this.disabledCells = []; // Array to store currently disabled cells
	this.prevDisabledCells = []; // Track previously disabled cells for re-enabling
	this.cellsPerLayer = 2; // Number of cells to disable per layer
	this.initialize = function () {
		// Disable initial cells for round 1
		this.disableRandomCells();
	};
	this.disableRandomCells = function () {
		// Store previously disabled cells
		this.prevDisabledCells = this.disabledCells.slice();
		this.disabledCells = [];
		// Process rows in order: up (0), left (1), right (2), down (3)
		for (var r = 0; r < GameConstants.BEAT_ROWS; r++) {
			var availableCols = [];
			// Get all columns for this row, excluding previously disabled ones
			for (var c = 0; c < GameConstants.GRID_COLS; c++) {
				var isValid = true;
				// Check if this column was previously disabled for this row
				for (var p = 0; p < this.prevDisabledCells.length; p++) {
					if (this.prevDisabledCells[p].row === r && this.prevDisabledCells[p].col === c) {
						isValid = false;
						break;
					}
				}
				// Check minimum distance constraint from already disabled cells in this row
				for (var d = 0; d < this.disabledCells.length; d++) {
					if (this.disabledCells[d].row === r) {
						var distance = Math.abs(this.disabledCells[d].col - c);
						if (distance < 3) {
							// Minimum 2 tiles between disabled cells
							isValid = false;
							break;
						}
					}
				}
				// Check diagonal constraint for rows below the first
				if (r > 0) {
					// Only check the immediately previous row for diagonal constraints
					var prevRow = r - 1;
					for (var d = 0; d < this.disabledCells.length; d++) {
						if (this.disabledCells[d].row === prevRow) {
							var prevCol = this.disabledCells[d].col;
							// Check if this column is diagonally adjacent to a disabled cell in the previous row
							if (c === prevCol - 1 || c === prevCol || c === prevCol + 1) {
								isValid = false;
								break;
							}
						}
					}
				}
				if (isValid) {
					availableCols.push(c);
				}
			}
			// Select cells with minimum distance constraint
			var selectedCols = [];
			var attempts = 0;
			while (selectedCols.length < this.cellsPerLayer && availableCols.length > 0 && attempts < 100) {
				attempts++;
				// Pick a random column from available
				var randomIndex = Math.floor(Math.random() * availableCols.length);
				var col = availableCols[randomIndex];
				// Check if this column maintains minimum distance from already selected
				var validChoice = true;
				for (var s = 0; s < selectedCols.length; s++) {
					if (Math.abs(selectedCols[s] - col) < 3) {
						validChoice = false;
						break;
					}
				}
				if (validChoice) {
					selectedCols.push(col);
					// Remove this column and nearby columns from available
					availableCols = availableCols.filter(function (c) {
						return Math.abs(c - col) >= 3;
					});
				} else {
					// Remove this column as it's too close
					availableCols.splice(randomIndex, 1);
				}
			}
			// Disable the selected columns
			for (var i = 0; i < selectedCols.length; i++) {
				var col = selectedCols[i];
				var cell = this.gameGrid.getBeatCell(r, col);
				if (cell) {
					this.disabledCells.push({
						row: r,
						col: col,
						cell: cell
					});
					// Hide the cell
					cell.visible = false;
				}
			}
		}
	};
	this.reset = function () {
		// First, enable ALL cells in the beat grid
		for (var r = 0; r < GameConstants.BEAT_ROWS; r++) {
			for (var c = 0; c < GameConstants.GRID_COLS; c++) {
				var cell = this.gameGrid.getBeatCell(r, c);
				if (cell) {
					cell.visible = true;
				}
			}
		}
		// Clear both arrays to start fresh
		this.prevDisabledCells = [];
		this.disabledCells = [];
		// Disable new random cells with a completely new pattern
		this.disableRandomCells();
	};
	// Check if a cell is disabled
	this.isCellDisabled = function (beatRow, col) {
		for (var i = 0; i < this.disabledCells.length; i++) {
			var disabled = this.disabledCells[i];
			if (disabled.row === beatRow && disabled.col === col) {
				return true;
			}
		}
		return false;
	};
}
function GameGrid(game) {
	this.game = game;
	this.rows = GameConstants.TOTAL_ROWS;
	this.cols = GameConstants.GRID_COLS;
	this.grid = []; // 2D array: [row][col] for all rows (playable + beat)
	this.beatRows = GameConstants.BEAT_ROWS;
	this.playableRows = this.rows - this.beatRows;
	// Initialize grid with nulls
	for (var r = 0; r < this.rows; r++) {
		this.grid[r] = [];
		for (var c = 0; c < this.cols; c++) {
			this.grid[r][c] = null;
		}
	}
	// Create background visuals for all cells
	this.initBackground = function () {
		var initialCoinCount = 0;
		for (var r = 0; r < this.rows; r++) {
			for (var c = 0; c < this.cols; c++) {
				var bgCell = LK.getAsset('emptycell', {
					anchorX: 0.5,
					anchorY: 0.5,
					alpha: 0.3
				});
				bgCell.x = GameConstants.GRID_LEFT + c * GameConstants.CELL_SIZE + GameConstants.CELL_SIZE / 2;
				bgCell.y = GameConstants.GRID_TOP + r * GameConstants.CELL_SIZE + GameConstants.CELL_SIZE / 2;
				this.game.addChild(bgCell);
				// Add coin to all playable cells (hero will be positioned after coins are created)
				if (r < this.playableRows) {
					var coin = new Coin();
					coin.x = bgCell.x;
					coin.y = bgCell.y;
					this.game.addChild(coin);
					this.grid[r][c] = coin;
					initialCoinCount++;
				}
			}
		}
		return initialCoinCount;
	};
	// Create BeatCell objects for the beat grid (bottom rows)
	this.initBeatGrid = function () {
		for (var r = 0; r < this.beatRows; r++) {
			var gridRow = this.playableRows + r;
			for (var c = 0; c < this.cols; c++) {
				var cell = new BeatCell(r);
				cell.x = GameConstants.GRID_LEFT + c * GameConstants.CELL_SIZE + GameConstants.CELL_SIZE / 2;
				cell.y = GameConstants.GRID_TOP + gridRow * GameConstants.CELL_SIZE + GameConstants.CELL_SIZE / 2;
				this.game.addChild(cell);
				this.grid[gridRow][c] = cell;
			}
		}
	};
	// Returns the BeatCell at a given (beatRow, col) in the beat grid
	this.getBeatCell = function (beatRow, col) {
		var gridRow = this.playableRows + beatRow;
		return this.grid[gridRow][col];
	};
	// Returns the BeatCell at a given (x, y) screen coordinate, or null if not in beat grid
	this.getBeatCellAt = function (x, y) {
		for (var r = 0; r < this.beatRows; r++) {
			var gridRow = this.playableRows + r;
			for (var c = 0; c < this.cols; c++) {
				var cell = this.grid[gridRow][c];
				if (!cell) {
					continue;
				}
				var cx = GameConstants.GRID_LEFT + c * GameConstants.CELL_SIZE + GameConstants.CELL_SIZE / 2;
				var cy = GameConstants.GRID_TOP + gridRow * GameConstants.CELL_SIZE + GameConstants.CELL_SIZE / 2;
				if (x >= cx - GameConstants.CELL_SIZE / 2 && x <= cx + GameConstants.CELL_SIZE / 2 && y >= cy - GameConstants.CELL_SIZE / 2 && y <= cy + GameConstants.CELL_SIZE / 2) {
					return cell;
				}
			}
		}
		return null;
	};
	// Returns true if (row, col) is in the playable area
	this.isPlayableCell = function (row, col) {
		return row >= 0 && row < this.playableRows && col >= 0 && col < this.cols;
	};
	// Returns true if (row, col) is in the beat grid
	this.isBeatCell = function (row, col) {
		return row >= this.playableRows && row < this.rows && col >= 0 && col < this.cols;
	};
	// Returns the BeatCell 2D array for the beat grid (bottom rows)
	this.getBeatGrid = function () {
		var arr = [];
		for (var r = 0; r < this.beatRows; r++) {
			arr[r] = [];
			for (var c = 0; c < this.cols; c++) {
				arr[r][c] = this.getBeatCell(r, c);
			}
		}
		return arr;
	};
	// Returns the playable area as a 2D array (nulls, or game objects if you want to add them)
	this.getPlayableGrid = function () {
		var arr = [];
		for (var r = 0; r < this.playableRows; r++) {
			arr[r] = [];
			for (var c = 0; c < this.cols; c++) {
				arr[r][c] = this.grid[r][c];
			}
		}
		return arr;
	};
	// Reset the playable grid with coins in all cells except hero's position
	this.resetGridWithCoins = function (heroRow, heroCol) {
		// Clear existing coins and enemies
		for (var r = 0; r < this.playableRows; r++) {
			for (var c = 0; c < this.cols; c++) {
				if (this.grid[r][c]) {
					this.grid[r][c].destroy();
					this.grid[r][c] = null;
				}
			}
		}
		// Add new coins to all cells except hero's position
		var coinCount = 0;
		var availablePositions = [];
		for (var r = 0; r < this.playableRows; r++) {
			for (var c = 0; c < this.cols; c++) {
				if (r !== heroRow || c !== heroCol) {
					// Calculate distance from hero
					var rowDist = Math.abs(r - heroRow);
					var colDist = Math.abs(c - heroCol);
					var distance = Math.max(rowDist, colDist); // Chebyshev distance
					var coin = new Coin();
					coin.x = GameConstants.GRID_LEFT + c * GameConstants.CELL_SIZE + GameConstants.CELL_SIZE / 2;
					coin.y = GameConstants.GRID_TOP + r * GameConstants.CELL_SIZE + GameConstants.CELL_SIZE / 2;
					this.game.addChild(coin);
					this.grid[r][c] = coin;
					coinCount++;
					// Track positions that are far enough from hero for enemy placement
					if (distance > 2) {
						availablePositions.push({
							r: r,
							c: c
						});
					}
				}
			}
		}
		// Place enemies starting from round 2
		var enemyCount = currentRound - 1; // 0 at round 1, 1 at round 2, etc.
		if (enemyCount > 0 && availablePositions.length > 0) {
			// Shuffle available positions
			for (var i = availablePositions.length - 1; i > 0; i--) {
				var j = Math.floor(Math.random() * (i + 1));
				var temp = availablePositions[i];
				availablePositions[i] = availablePositions[j];
				availablePositions[j] = temp;
			}
			// Place enemies up to enemyCount or available positions
			var enemiesToPlace = Math.min(enemyCount, availablePositions.length);
			for (var i = 0; i < enemiesToPlace; i++) {
				var pos = availablePositions[i];
				// Remove coin at this position
				if (this.grid[pos.r][pos.c]) {
					this.grid[pos.r][pos.c].destroy();
					coinCount--;
				}
				// Place enemy
				var enemy = new Enemy();
				enemy.x = GameConstants.GRID_LEFT + pos.c * GameConstants.CELL_SIZE + GameConstants.CELL_SIZE / 2;
				enemy.y = GameConstants.GRID_TOP + pos.r * GameConstants.CELL_SIZE + GameConstants.CELL_SIZE / 2;
				this.game.addChild(enemy);
				this.grid[pos.r][pos.c] = enemy;
			}
		}
		return coinCount;
	};
	// Call this to initialize all visuals
	this.initialize = function () {
		this.initBeatGrid();
	};
}
var GameConstants = {
	GRID_COLS: 8,
	TOTAL_ROWS: 10,
	// Reduced from 11 to remove top row
	BEAT_ROWS: 4,
	// +1 for new down row
	CHAR_ROW: 3,
	// hero now starts at row 3 (was 4) due to removed top row
	JUMP_ROW: 2,
	// up movement now at row 2 (was 3) due to removed top row
	DOWN_ROW: 1,
	// new down movement row 1 (was 2) due to removed top row
	GRID_MARGIN_X: 40,
	get CELL_SIZE() {
		return Math.floor((2048 - 2 * this.GRID_MARGIN_X) / this.GRID_COLS);
	},
	get GRID_HEIGHT() {
		return this.TOTAL_ROWS * this.CELL_SIZE;
	},
	get GRID_TOP() {
		return 2732 - this.GRID_HEIGHT - 10;
	},
	get GRID_LEFT() {
		return this.GRID_MARGIN_X;
	},
	get HERO_MIN_X() {
		return this.GRID_LEFT + this.CELL_SIZE / 2;
	},
	get HERO_MAX_X() {
		return this.GRID_LEFT + (this.GRID_COLS - 1) * this.CELL_SIZE + this.CELL_SIZE / 2;
	},
	get HERO_START_COL() {
		return Math.floor(this.GRID_COLS / 2);
	},
	get HERO_START_X() {
		return this.GRID_LEFT + this.HERO_START_COL * this.CELL_SIZE + this.CELL_SIZE / 2;
	},
	get HERO_START_Y() {
		return this.GRID_TOP + this.CHAR_ROW * this.CELL_SIZE + this.CELL_SIZE / 2;
	},
	STEP_INTERVAL: 400,
	// ms per step (150bpm)
	COIN_SPAWN_BEATS: 8,
	COIN_SPAWN_CHANCE: 0.25
};
/************************* 
* SERVICES
*************************/ 
/** 
* AudioService
* Responsibility: To handle all requests to play sounds and music.
*/ 
var AudioService = {
	playBeat: function playBeat() {
		LK.getSound('beat').play();
	},
	playBeatUp: function playBeatUp() {
		LK.getSound('Sound_Up').play();
	},
	playBeatLeft: function playBeatLeft() {
		LK.getSound('Sound_Left').play();
	},
	playBeatRight: function playBeatRight() {
		LK.getSound('Sound_Right').play();
	},
	playBeatDown: function playBeatDown() {
		LK.getSound('Sound_Down').play();
	},
	playMove: function playMove() {
		LK.getSound('moveSnd').play();
	},
	playCoinCollect: function playCoinCollect() {
		LK.getSound('coinCollect').play();
	},
	playNewLevel: function playNewLevel() {
		LK.getSound('NewLevel').play();
	},
	startMusic: function startMusic() {
		LK.playMusic('bgmusic', {
			fade: {
				start: 0,
				end: 0.3,
				duration: 1200
			}
		});
	}
};
/** 
* UIService
* Responsibility: To create and manage all non-game-grid UI elements, such
* as the score text and the step indicators.
*/ 
function UIService(game) {
	this.game = game;
	this.scoreTxt = null;
	this.initialize = function () {
		// Score Text
		this.scoreTxt = new Text2('0', {
			size: 100,
			fill: "#fff"
		});
		this.scoreTxt.anchor.set(0.5, 0);
		LK.gui.top.addChild(this.scoreTxt);
		// Create columnHighlights for beat grid rows
		this.columnHighlights = [];
		for (var r = 0; r < GameConstants.BEAT_ROWS; r++) {
			var highlight = LK.getAsset('cellWhite', {
				anchorX: 0.5,
				anchorY: 0.5,
				alpha: 0 // invisible by default
			});
			// Position highlight at the leftmost column, correct row in the beat grid
			var gridRow = GameConstants.TOTAL_ROWS - GameConstants.BEAT_ROWS + r;
			highlight.x = GameConstants.GRID_LEFT + GameConstants.CELL_SIZE / 2;
			highlight.y = GameConstants.GRID_TOP + gridRow * GameConstants.CELL_SIZE + GameConstants.CELL_SIZE / 2;
			highlight.alpha = 0; // invisible by default, semi-transparent when shown
			this.game.addChild(highlight);
			this.columnHighlights.push(highlight);
		}
		// Hide all highlights at start
		for (var i = 0; i < this.columnHighlights.length; i++) {
			this.columnHighlights[i].alpha = 0;
		}
	};
	this.updateScore = function (newScore) {
		this.scoreTxt.setText(newScore);
	};
	// Main Highlighting Logic: highlights inactive cells in the current column
	this.updateColumnHighlight = function (currentColumnIndex) {
		// Hide all highlights first
		for (var i = 0; i < this.columnHighlights.length; i++) {
			this.columnHighlights[i].alpha = 0;
		}
		// Get active states for the current column
		var activeStates = gridService.getActiveStatesForColumn(currentColumnIndex);
		// Loop through each row in the beat grid
		for (var i = 0; i < GameConstants.BEAT_ROWS; i++) {
			if (!activeStates[i]) {
				// Position the highlight at the correct cell
				var gridRow = GameConstants.TOTAL_ROWS - GameConstants.BEAT_ROWS + i;
				this.columnHighlights[i].x = GameConstants.GRID_LEFT + currentColumnIndex * GameConstants.CELL_SIZE + GameConstants.CELL_SIZE / 2;
				this.columnHighlights[i].y = GameConstants.GRID_TOP + gridRow * GameConstants.CELL_SIZE + GameConstants.CELL_SIZE / 2;
				this.columnHighlights[i].alpha = 0.2; // semi-transparent highlight
			}
		}
	};
}
/** 
* GridService
* Responsibility: To create, manage the state of, and update the visuals of the beat grid.
*/ 
function GridService(game, gameGrid) {
	this.game = game;
	this.gameGrid = gameGrid; // Centralized grid
	this.initialize = function () {
		this.gameGrid.initialize();
	};
	// Returns the BeatCell at a given (x, y) screen coordinate, or null if not in beat grid
	this.getCellAt = function (x, y) {
		var cell = this.gameGrid.getBeatCellAt(x, y);
		// Check if cell is disabled by anti-cheat
		if (cell && antiCheatService) {
			// Find the beat row of this cell
			var beatRow = cell.row;
			var col = -1;
			// Find column
			for (var c = 0; c < GameConstants.GRID_COLS; c++) {
				if (this.gameGrid.getBeatCell(beatRow, c) === cell) {
					col = c;
					break;
				}
			}
			if (col !== -1 && antiCheatService.isCellDisabled(beatRow, col)) {
				return null; // Return null if cell is disabled
			}
		}
		return cell;
	};
	// Returns an array of booleans representing the active state of each BeatCell in the given column
	this.getActiveStatesForColumn = function (columnIndex) {
		var states = [];
		for (var r = 0; r < GameConstants.BEAT_ROWS; r++) {
			var gridRow = GameConstants.TOTAL_ROWS - GameConstants.BEAT_ROWS + r;
			var cell = this.gameGrid.grid[gridRow][columnIndex];
			// Check if cell is disabled by anti-cheat
			var isDisabled = antiCheatService && antiCheatService.isCellDisabled(r, columnIndex);
			states.push(cell && cell.active && !isDisabled ? true : false);
		}
		return states;
	};
	// Toggle a beat cell, ensuring only one beat per layer per column
	this.toggleCell = function (cell, mode) {
		var needsChange = mode === 'add' && !cell.active || mode === 'remove' && cell.active;
		if (needsChange) {
			// If adding, remove any other active beat in this column (same col, different row)
			if (mode === 'add') {
				var col = null;
				// Find the column index of this cell
				for (var c = 0; c < GameConstants.GRID_COLS; c++) {
					// cell.row is the beat row (0..BEAT_ROWS-1), but grid is [playableRows+row][col]
					var gridRow = GameConstants.TOTAL_ROWS - GameConstants.BEAT_ROWS + cell.row;
					if (this.gameGrid.grid[gridRow][c] === cell) {
						col = c;
						break;
					}
				}
				if (col !== null) {
					for (var r = 0; r < GameConstants.BEAT_ROWS; r++) {
						var gridRow = GameConstants.TOTAL_ROWS - GameConstants.BEAT_ROWS + r;
						var otherCell = this.gameGrid.grid[gridRow][col];
						if (r !== cell.row && otherCell && otherCell.active) {
							otherCell.setActive(false);
							this.updateCellVisual(otherCell);
						}
					}
				}
			}
			cell.toggle();
			this.updateCellVisual(cell);
		}
	};
	this.updateCellVisual = function (cell) {
		cell.gfx.destroy();
		var assetId = 'cell';
		var alpha = 1.0;
		// Always show the appropriate beat tile based on row
		if (cell.row === 0) {
			assetId = 'cellActive';
		} else if (cell.row === 1) {
			assetId = 'cellLeft';
		} else if (cell.row === 2) {
			assetId = 'cellRight';
		} else if (cell.row === 3) {
			assetId = 'cellDown';
		}
		// Set transparency based on active state
		if (!cell.active) {
			alpha = 0.1;
		}
		cell.gfx = cell.attachAsset(assetId, {
			anchorX: 0.5,
			anchorY: 0.5,
			alpha: alpha
		});
	};
	// Returns the actions for a given step (column) by checking the beat grid
	this.getActiveActionsForStep = function (step) {
		// The beat grid is in the bottom rows of the grid
		var actions = {
			up: false,
			left: false,
			right: false,
			down: false
		};
		for (var r = 0; r < GameConstants.BEAT_ROWS; r++) {
			var gridRow = GameConstants.TOTAL_ROWS - GameConstants.BEAT_ROWS + r;
			var cell = this.gameGrid.grid[gridRow][step];
			if (!cell) {
				continue;
			}
			// Check if cell is disabled by anti-cheat
			var isDisabled = antiCheatService && antiCheatService.isCellDisabled(r, step);
			if (r === 0) {
				actions.up = cell.active && !isDisabled;
			} else if (r === 1) {
				actions.left = cell.active && !isDisabled;
			} else if (r === 2) {
				actions.right = cell.active && !isDisabled;
			} else if (r === 3) {
				actions.down = cell.active && !isDisabled;
			}
		}
		return actions;
	};
}
/** 
* PlayerService
* Responsibility: To create and manage the Hero instance, its state, and its actions.
* It translates logical actions ("move left") into animations and sound calls.
*/ 
function PlayerService(game) {
	this.game = game;
	this.hero = null;
	this.initialize = function () {
		this.hero = new Hero();
		// Select random starting position in playable grid
		var randomRow = Math.floor(Math.random() * gameGrid.playableRows);
		var randomCol = Math.floor(Math.random() * GameConstants.GRID_COLS);
		// Calculate position based on random grid coordinates
		this.hero.x = GameConstants.GRID_LEFT + randomCol * GameConstants.CELL_SIZE + GameConstants.CELL_SIZE / 2;
		this.hero.y = GameConstants.GRID_TOP + randomRow * GameConstants.CELL_SIZE + GameConstants.CELL_SIZE / 2;
		this.hero.currentCol = randomCol;
		this.hero.gridRow = randomRow;
		// Update CHAR_ROW to match random starting row
		GameConstants.CHAR_ROW = randomRow;
		this.game.addChild(this.hero);
		// Remove coin at hero's starting position if one exists
		var coin = gameGrid.grid[randomRow][randomCol];
		if (coin && coin.collect) {
			coin.destroy();
			gameGrid.grid[randomRow][randomCol] = null;
			totalCoins--; // Decrease initial coin count
		}
	};
	this.getHeroInstance = function () {
		return this.hero;
	};
	this.handleDrag = function (x) {
		this.hero.x = Math.max(GameConstants.HERO_MIN_X, Math.min(GameConstants.HERO_MAX_X, x));
	};
	this.performActions = function (actions) {
		var didAction = false;
		var horizontalMove = 0;
		var hero = this.hero;
		var direction = "down";
		var isEating = false;
		var isUpWalkAlt = hero.upWalkAlt || false;
		if (actions.left && !actions.right) {
			horizontalMove = -1;
			direction = "left";
		}
		if (actions.right && !actions.left) {
			horizontalMove = 1;
			direction = "right";
		}
		if (actions.up && !actions.down) {
			direction = "up";
			// Alternate up-walk frame
			isUpWalkAlt = !hero.upWalkAlt;
			if (horizontalMove !== 0) {
				this.move(horizontalMove);
			}
			this.moveVertical(-1); // Move up
			didAction = true;
		} else if (actions.down && !actions.up) {
			direction = "down";
			hero.upWalkAlt = false; // Reset alternation on down
			if (horizontalMove !== 0) {
				this.move(horizontalMove);
			}
			this.moveVertical(1); // Move down
			didAction = true;
		} else if (horizontalMove !== 0) {
			// Only horizontal
			direction = horizontalMove === -1 ? "left" : "right";
			hero.upWalkAlt = false; // Reset alternation on horizontal
			this.move(horizontalMove);
			didAction = true;
		}
		// Set hero frame for movement (not eating)
		hero.setFrame(direction, false, isUpWalkAlt);
		if (didAction) {
			// Pop animation: scale up to 1.18, then back to 1.0
			tween.stop(hero, {
				scaleX: true,
				scaleY: true
			});
			hero.scaleX = 1.0;
			hero.scaleY = 1.0;
			tween(hero, {
				scaleX: 1.1,
				scaleY: 1.1
			}, {
				duration: 75,
				easing: tween.cubicOut,
				onFinish: function onFinish() {
					tween(hero, {
						scaleX: 1.0,
						scaleY: 1.0
					}, {
						duration: 125,
						easing: tween.cubicIn
					});
				}
			});
			AudioService.playBeat();
		}
	};
	this.move = function (direction) {
		var newCol = this.hero.currentCol + direction;
		if (newCol < 0) {
			newCol = GameConstants.GRID_COLS - 1;
		}
		if (newCol >= GameConstants.GRID_COLS) {
			newCol = 0;
		}
		this.hero.currentCol = newCol;
		var nx = GameConstants.GRID_LEFT + newCol * GameConstants.CELL_SIZE + GameConstants.CELL_SIZE / 2;
		this.hero.moveTo(nx, this.hero.y, 180);
		AudioService.playMove();
	};
	// Move up or down by 1 row, with vertical teleport at edges of playable area
	this.moveVertical = function (direction) {
		var minRow = 0;
		var maxRow = gameGrid.playableRows - 1; // Only teleport within playable area (rows 0-5 after removing top row)
		var newRow = this.hero.gridRow !== undefined ? this.hero.gridRow : GameConstants.CHAR_ROW;
		newRow += direction;
		// Teleport vertically if out of bounds
		if (newRow < minRow) {
			newRow = maxRow;
		} else if (newRow > maxRow) {
			newRow = minRow;
		}
		this.hero.gridRow = newRow;
		var ny = GameConstants.GRID_TOP + newRow * GameConstants.CELL_SIZE + GameConstants.CELL_SIZE / 2;
		this.hero.moveTo(this.hero.x, ny, 180);
		AudioService.playMove();
		// Update CHAR_ROW for collision logic
		GameConstants.CHAR_ROW = newRow;
	};
}
/** 
* InputService
* Responsibility: To handle all raw user input (down, up, move) and delegate
* the appropriate actions to other services (GridService, PlayerService).
*/ 
function InputService(gridService, playerService) {
	this.gridService = gridService;
	this.playerService = playerService;
	this.isPainting = false;
	this.paintMode = null;
	this.lastPaintedCell = null;
	this.dragHero = false;
	this.handleDown = function (x, y) {
		var cell = this.gridService.getCellAt(x, y);
		if (cell) {
			this.isPainting = true;
			this.paintMode = cell.active ? 'remove' : 'add';
			this.lastPaintedCell = cell;
			this.gridService.toggleCell(cell, this.paintMode);
		} else {
			var hero = this.playerService.getHeroInstance();
			var dx = x - hero.x,
				dy = y - hero.y;
			if (dx * dx + dy * dy < 200 * 200) {
				this.dragHero = true;
			}
		}
	};
	this.handleUp = function () {
		this.isPainting = false;
		this.paintMode = null;
		this.lastPaintedCell = null;
		this.dragHero = false;
	};
	this.handleMove = function (x, y) {
		if (this.isPainting) {
			var cell = this.gridService.getCellAt(x, y);
			if (cell && cell !== this.lastPaintedCell) {
				this.lastPaintedCell = cell;
				this.gridService.toggleCell(cell, this.paintMode);
			}
		} else if (this.dragHero) {
			this.playerService.handleDrag(x);
		}
	};
}
/** 
* SequencerService
* Responsibility: To manage the main game loop timing (the "beat"). On each step,
* it orchestrates calls to the other services to update the game state.
*/ 
function SequencerService(gridService, playerService, uiService) {
	this.gridService = gridService;
	this.playerService = playerService;
	this.uiService = uiService;
	this.currentStep = 0;
	this.lastStepTime = 0;
	this.playing = true;
	this.comboMultiplier = 1;
	this.collectedThisBeat = false;
	this.prevComboMultiplier = 1; // Previous Fibonacci number
	this.comboCount = 0; // Track position in Fibonacci sequence
	this.enemyCellRow = undefined; // Track enemy cell position
	this.enemyCellCol = undefined; // Track enemy cell position
	this.initialize = function () {
		this.lastStepTime = Date.now();
	};
	this.update = function () {
		var now = Date.now();
		if (this.playing && now - this.lastStepTime >= GameConstants.STEP_INTERVAL) {
			this.lastStepTime = now;
			// 1. UPDATE HIGHLIGHT FIRST for the current step
			this.uiService.updateColumnHighlight(this.currentStep);
			// 2. THEN, advance the step to the next beat
			this.currentStep = (this.currentStep + 1) % GameConstants.GRID_COLS;
			// 3. FINALLY, perform actions for the new step.
			this.doStepActions();
		}
	};
	this.doStepActions = function () {
		// Reset collection flag for this beat
		this.collectedThisBeat = false;
		// Get actions for the PREVIOUS step (the one the highlight just left)
		var previousStep = (this.currentStep - 1 + GameConstants.GRID_COLS) % GameConstants.GRID_COLS;
		var actions = this.gridService.getActiveActionsForStep(previousStep);
		// Play beat sounds for the previous step
		if (actions.up) {
			AudioService.playBeatUp();
		} else if (actions.left) {
			AudioService.playBeatLeft();
		} else if (actions.right) {
			AudioService.playBeatRight();
		} else if (actions.down) {
			AudioService.playBeatDown();
		} else {
			AudioService.playBeat();
		}
		// Animate active beat cells for the previous step
		for (var r = 0; r < GameConstants.BEAT_ROWS; r++) {
			var cell = gameGrid.getBeatCell(r, previousStep);
			if (cell && cell.active && !antiCheatService.isCellDisabled(r, previousStep)) {
				// Create bump animation: scale up to 110% then back to 100%
				tween(cell, {
					scaleX: 1.1,
					scaleY: 1.1
				}, {
					duration: 100,
					easing: tween.easeOut,
					onFinish: function (targetCell) {
						return function () {
							tween(targetCell, {
								scaleX: 1.0,
								scaleY: 1.0
							}, {
								duration: 100,
								easing: tween.easeIn
							});
						};
					}(cell)
				});
			}
		}
		// Store hero's previous position before performing actions
		var hero = this.playerService.getHeroInstance();
		var prevHeroRow = hero.gridRow;
		var prevHeroCol = hero.currentCol;
		// Perform actions for the previous step
		this.playerService.performActions(actions);
		// Check if hero was on an enemy cell and has now moved away
		if (this.enemyCellRow !== undefined && this.enemyCellCol !== undefined) {
			// Check if hero has moved to a different cell
			if (hero.gridRow !== this.enemyCellRow || hero.currentCol !== this.enemyCellCol) {
				// Hero has left the enemy cell - trigger game over
				LK.showGameOver();
				return; // Exit early
			}
		}
		// Check for coin collection or enemy collision at current position
		var heroRow = hero.gridRow;
		var heroCol = hero.currentCol;
		var entity = gameGrid.grid[heroRow][heroCol];
		if (entity) {
			// Check if it's an enemy
			if (!entity.collect) {
				// Enemy detected - store the position but don't trigger game over yet
				this.enemyCellRow = heroRow;
				this.enemyCellCol = heroCol;
			} else if (entity.collect) {
				// It's a coin - clear any enemy tracking
				this.enemyCellRow = undefined;
				this.enemyCellCol = undefined;
				entity.collect();
				gameGrid.grid[heroRow][heroCol] = null;
				// Decrement projectile counter and fire projectile if needed
				coinsToNextProjectile--;
				if (coinsToNextProjectile <= 0) {
					// Find all uncollected coins on the grid
					var availableCoins = [];
					for (var r = 0; r < gameGrid.playableRows; r++) {
						for (var c = 0; c < GameConstants.GRID_COLS; c++) {
							var obj = gameGrid.grid[r][c];
							if (obj && obj.collect && !obj.collected) {
								availableCoins.push(obj);
							}
						}
					}
					if (availableCoins.length > 0) {
						var targetIdx = Math.floor(Math.random() * availableCoins.length);
						var targetCoin = availableCoins[targetIdx];
						// Create projectile at hero's position, pass checkRoundCompletion as callback
						var projectile = new Projectile(targetCoin, checkRoundCompletion);
						projectile.x = hero.x;
						projectile.y = hero.y;
						game.addChild(projectile);
					}
					coinsToNextProjectile = 10; // Reset counter after firing
				}
				updateProjectileCounterUI();
				// Apply combo multiplier to score (incremental: 1,2,3...)
				var points = this.comboMultiplier;
				LK.setScore(LK.getScore() + points);
				uiService.updateScore(LK.getScore());
				AudioService.playCoinCollect();
				// Set hero frame to Eat variant for this direction
				var eatDirection = hero.lastDirection || "down";
				var eatUpWalkAlt = hero.upWalkAlt || false;
				if (eatDirection === "down") {
					// Show hero_2 when eating facing camera, then revert to hero
					hero.gfx.destroy();
					hero.gfx = hero.attachAsset('hero_2', {
						anchorX: 0.5,
						anchorY: 0.5
					});
					hero.gfx.assetId = "hero_2";
					LK.setTimeout(function () {
						hero.setFrame("down", false, false);
					}, 299);
				} else {
					hero.setFrame(eatDirection, true, eatUpWalkAlt);
					// After 299ms, revert to walk frame (not eating)
					LK.setTimeout(function () {
						hero.setFrame(eatDirection, false, eatUpWalkAlt);
					}, 299);
				}
				// Mark that we collected a coin this beat
				this.collectedThisBeat = true;
				// Increment combo multiplier by 1 for each consecutive coin
				this.comboMultiplier++;
				this.comboCount++;
				// Call the centralized function for player collection.
				checkRoundCompletion();
			}
		} else {
			// No entity at current position - clear any enemy tracking
			this.enemyCellRow = undefined;
			this.enemyCellCol = undefined;
			// No coin collected - reset combo if we had one
			if (this.comboMultiplier > 1) {
				this.comboMultiplier = 1;
				this.comboCount = 0;
			}
		}
	};
}
var currentRound = 1;
var totalCoins = 0;
var collectedCoins = 0;
// --- Projectile Counter UI ---
var coinsToNextProjectile = 10;
var projectileCounterTxt = new Text2("Next shot: 10", {
	size: 70,
	fill: 0xFFD700
});
projectileCounterTxt.anchor.set(1, 0); // right-top
// Place in top right, but leave 100px margin for menu
LK.gui.topRight.addChild(projectileCounterTxt);
// Helper to update the UI text
function updateProjectileCounterUI() {
	projectileCounterTxt.setText("Next shot: " + coinsToNextProjectile);
}
updateProjectileCounterUI();
/** 
* Resets the game state and starts the next round.
*/ 
function startNextRound() {
	AudioService.playNewLevel();
	currentRound++;
	collectedCoins = 0;
	// Reset the hero's position to a new random spot
	var hero = playerService.getHeroInstance();
	var randomRow = Math.floor(Math.random() * gameGrid.playableRows);
	var randomCol = Math.floor(Math.random() * GameConstants.GRID_COLS);
	// Reset the grid with new coins, enemies, and get the new total coin count
	totalCoins = gameGrid.resetGridWithCoins(randomRow, randomCol);
	// Now update hero's position to match the logical grid
	hero.x = GameConstants.GRID_LEFT + randomCol * GameConstants.CELL_SIZE + GameConstants.CELL_SIZE / 2;
	hero.y = GameConstants.GRID_TOP + randomRow * GameConstants.CELL_SIZE + GameConstants.CELL_SIZE / 2;
	hero.currentCol = randomCol;
	hero.gridRow = randomRow;
	// Reset and re-disable cells for the new round
	antiCheatService.reset();
}
/** 
* Checks if the round is complete and triggers the next round if it is.
* This function will be called whenever a coin is collected.
*/ 
function checkRoundCompletion() {
	collectedCoins++;
	if (collectedCoins >= totalCoins) {
		// Use a short delay before starting the next round to let the last collection animation finish
		LK.setTimeout(startNextRound, 500);
	}
}
// --- Patch coin collection logic to update counter and reset on projectile fire ---
// We'll patch the doStepActions method in SequencerService below
var uiService = new UIService(game);
var gameGrid = new GameGrid(game);
var antiCheatService = new AntiCheatService(null, gameGrid); // Initialize before gridService
var gridService = new GridService(game, gameGrid);
var playerService = new PlayerService(game);
var inputService = new InputService(gridService, playerService);
var sequencerService = new SequencerService(gridService, playerService, uiService);
// 3. Initialize Services in correct order
totalCoins = gameGrid.initBackground();
gameGrid.initBeatGrid();
uiService.initialize();
playerService.initialize();
sequencerService.initialize();
antiCheatService.initialize();
// Manually draw the highlight for the first beat (step 0) immediately.
uiService.updateColumnHighlight(sequencerService.currentStep);
// 4. Connect Input Handlers to the Input Service
game.down = function (x, y) {
	inputService.handleDown(x, y);
};
game.up = function (x, y) {
	inputService.handleUp(x, y);
};
game.move = function (x, y) {
	inputService.handleMove(x, y);
};
// 5. Set Main Game Loop to the Sequencer Service
game.update = function () {
	sequencerService.update();
};
// 6. Start background music
AudioService.startMusic();
;

===================================================================
--- original.js
+++ change.js
@@ -1230,14 +1230,15 @@
 	// Reset the hero's position to a new random spot
 	var hero = playerService.getHeroInstance();
 	var randomRow = Math.floor(Math.random() * gameGrid.playableRows);
 	var randomCol = Math.floor(Math.random() * GameConstants.GRID_COLS);
+	// Reset the grid with new coins, enemies, and get the new total coin count
+	totalCoins = gameGrid.resetGridWithCoins(randomRow, randomCol);
+	// Now update hero's position to match the logical grid
 	hero.x = GameConstants.GRID_LEFT + randomCol * GameConstants.CELL_SIZE + GameConstants.CELL_SIZE / 2;
 	hero.y = GameConstants.GRID_TOP + randomRow * GameConstants.CELL_SIZE + GameConstants.CELL_SIZE / 2;
 	hero.currentCol = randomCol;
 	hero.gridRow = randomRow;
-	// Reset the grid with new coins, enemies, and get the new total coin count
-	totalCoins = gameGrid.resetGridWithCoins(randomRow, randomCol);
 	// Reset and re-disable cells for the new round
 	antiCheatService.reset();
 }
 /**