/**** 
* Classes
****/
var Particle = Container.expand(function (color, gravityMultiplier) {
	var self = Container.call(this);
	gravityMultiplier = typeof gravityMultiplier === 'undefined' ? 1 : gravityMultiplier;
	self.gravityMultiplier = gravityMultiplier;
	self.graphics = self.attachAsset('particle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.graphics.tint = color;
	self.speedX = (Math.random() - 0.5) * 10;
	self.speedY = (Math.random() - 0.5) * 10;
	self.scaleX = self.scaleY = Math.random() * 0.5 + 0.5;
	self.alpha = 1;
	self.tick = function () {
		self.x += self.speedX;
		self.speedY += 0.7 * self.gravityMultiplier;
		self.y += self.speedY;
		self.alpha -= 0.02;
		if (self.alpha <= 0) {
			var index = particles.indexOf(self);
			if (index > -1) {
				particles.splice(index, 1);
			}
			self.destroy();
		}
	};
});
var Heart = Container.expand(function () {
	var self = Container.call(this);
	var heartBackground = self.attachAsset('heartBackground', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	heartBackground.blendMode = 1;
	var heartGraphics = self.attachAsset('heart', {
		anchorX: 0.5,
		anchorY: 0.5
	});
});
var LifeIndicator = Container.expand(function (initialLives) {
	var self = Container.call(this);
	LifeIndicator.prototype.triggerLifeLostParticles = function (x, y) {
		var particleColors = [0xff0000, 0xff4500, 0xff6347];
		for (var i = 0; i < 5; i++) {
			var color = particleColors[Math.floor(Math.random() * particleColors.length)];
			var particle = new Particle(color, 0);
			particle.x = x;
			particle.y = y;
			particles.push(particle);
			this.addChild(particle);
		}
	};
	self.lives = initialLives;
	self.hearts = [];
	var heartWidth = 110;
	var totalWidth = (self.lives - 1) * (heartWidth + 10);
	var startX = -totalWidth / 2;
	for (var i = 0; i < self.lives; i++) {
		var heart = new Heart();
		heart.x = startX + i * (heartWidth + 10);
		self.hearts.push(heart);
		self.addChild(heart);
	}
	self.updateLives = function (lives) {
		lives = Math.max(0, lives);
		while (self.hearts.length > lives) {
			var heart = self.hearts.pop();
			if (heart) {
				self.triggerLifeLostParticles(heart.x, heart.y);
				heart.destroy();
			}
		}
		while (self.hearts.length < lives) {
			var newHeart = new Heart();
			var heartWidth = 100;
			newHeart.x = startX + self.hearts.length * (heartWidth + 10);
			self.hearts.push(newHeart);
			self.addChild(newHeart);
		}
		self.lives = lives;
	};
});
var Snowflake = Container.expand(function () {
	var self = Container.call(this);
	self.rotation = Math.random() * Math.PI * 2;
	self.rotationSpeed = Math.random() * 0.05 - 0.025;
	var flakeGraphics = self.attachAsset('snowflake', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = Math.random() * 1.5 + 1;
	self.direction = Math.random() * Math.PI * 2;
	self.xSpeed = Math.cos(self.direction) * Math.abs(Math.random() * 1 + 0.5);
	self.ySpeed = Math.abs(Math.sin(self.direction)) * self.speed;
	self.tick = function () {
		self.x += self.xSpeed;
		self.y += self.ySpeed;
		self.scale.x = self.scale.y = 0.5 + self.ySpeed / 6;
		self.rotation += self.rotationSpeed;
		if (self.x > 2048 || self.x < 0 || self.y > 2732) {
			self.x = Math.random() * 2048;
			self.y = -50;
		}
	};
});
var Cell = Container.expand(function (type, totalTypes) {
	var self = Container.call(this);
	self.targetX = 0;
	self.targetY = 0;
	self.isMoving = false;
	self.totalTypes = totalTypes;
	self.type = typeof type === 'undefined' ? Math.floor(Math.random() * self.totalTypes) : type;
	var assetName = 'cellType' + self.type;
	var cellBackground = self.attachAsset('cellBackground', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	cellBackground.alpha = 0;
	var cellGraphics = self.createAsset(assetName, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.move = function (x, y, instant) {
		self.targetX = x;
		self.targetY = y;
		if (instant) {
			self.x = x;
			self.y = y;
		}
	};
	self.tick = function () {
		var acceleration = 2;
		self.speedX = self.speedX || 0;
		self.speedY = self.speedY || 0;
		var threshold = 1;
		var dx = self.targetX - self.x;
		var dy = self.targetY - self.y;
		if (Math.abs(dx) < threshold && Math.abs(dy) < threshold) {
			self.x = self.targetX;
			self.y = self.targetY;
			self.isMoving = false;
			self.speedX = 0;
			self.speedY = 0;
		} else {
			if (dx !== 0) {
				self.speedX += dx > 0 ? acceleration : -acceleration;
			}
			if (dy !== 0) {
				self.speedY += dy > 0 ? acceleration : -acceleration;
			}
			var nextX = self.x + self.speedX;
			var nextY = self.y + self.speedY;
			if (self.speedX > 0 && nextX > self.targetX || self.speedX < 0 && nextX < self.targetX) {
				nextX = self.targetX;
				self.speedX = 0;
			}
			if (self.speedY > 0 && nextY > self.targetY || self.speedY < 0 && nextY < self.targetY) {
				nextY = self.targetY;
				self.speedY = 0;
			}
			self.x = nextX;
			self.y = nextY;
			self.isMoving = self.x !== self.targetX || self.y !== self.targetY;
		}
	};
});

/**** 
* Initialize Game
****/
var game = new LK.Game({
	backgroundColor: 0x20497b
});

/**** 
* Game Code
****/
function hsvToRgb(h, s, v) {
	var i = Math.floor(h * 6),
		f = h * 6 - i,
		p = v * (1 - s),
		q = v * (1 - f * s),
		t = v * (1 - (1 - f) * s),
		mod = i % 6,
		r = [v, q, p, p, t, v][mod],
		g = [t, v, v, q, p, p][mod],
		b = [p, p, t, v, v, q][mod];
	return (r * 255 << 16) + (g * 255 << 8) + b * 255;
}
var particles = [];
game.createParticleEffect = function (x, y, type) {
	var fixedColors = [0x82d756, 0x5ecde9, 0xf8a4a0, 0x921d2a, 0x7719f9, 0xffffff, 0xefa63b, 0x7dd6a4];
	var color = fixedColors[type % fixedColors.length];
	for (var i = 0; i < 10; i++) {
		var particle = new Particle(color);
		particle.x = x + gridContainer.x;
		particle.y = y + gridContainer.y;
		particles.push(particle);
		this.addChild(particle);
	}
};
game.totalCellTypes = 2;
var score = 0;
game.hasPossibleMoves = function () {
	for (var col = 0; col < gridWidth; col++) {
		for (var row = 0; row < gridHeight; row++) {
			var cell = grid[col][row];
			if (cell) {
				var neighbors = [{
					x: col - 1,
					y: row
				}, {
					x: col + 1,
					y: row
				}, {
					x: col,
					y: row - 1
				}, {
					x: col,
					y: row + 1
				}];
				for (var i = 0; i < neighbors.length; i++) {
					var pos = neighbors[i];
					if (pos.x >= 0 && pos.x < gridWidth && pos.y >= 0 && pos.y < gridHeight) {
						var neighborCell = grid[pos.x][pos.y];
						if (neighborCell && neighborCell.type === cell.type) {
							return true;
						}
					}
				}
			}
		}
	}
	return false;
};
game.resetBoard = function () {
	grid.forEach(function (column, colIndex) {
		column.forEach(function (cell, rowIndex) {
			if (cell) {
				game.deleteCell(cell);
			}
			var newCell = new Cell(undefined, game.totalCellTypes);
			var targetPos = game.calculateTargetPosition(colIndex, rowIndex);
			newCell.move(targetPos.x, targetPos.y, true);
			game.attachCellListeners(newCell);
			newCell.y = -100;
			grid[colIndex][rowIndex] = newCell;
			gridContainer.addChild(newCell);
		});
	});
};
var background = game.attachAsset('background', {
	anchorX: 0.5,
	anchorY: 0.5
});
background.x = 2048 / 2;
background.y = 2732 / 2;
game.addChild(background);
var gridWidth = 8;
var gridHeight = 8;
var gridSpacing = 8;
var cellWidth = 200;
var cellHeight = 200;
var gridContainer = new Container();
var boardBackground = game.attachAsset('boardBackground', {
	anchorX: 0.5,
	anchorY: 0.5
});
boardBackground.alpha = 0.7;
gridContainer.addChildAt(boardBackground, 0);
game.addChild(gridContainer);
var totalGridWidth = gridWidth * (cellWidth + gridSpacing) - gridSpacing;
var totalGridHeight = gridHeight * (cellHeight + gridSpacing) - gridSpacing;
gridContainer.x = (2048 - totalGridWidth) / 2 + cellWidth / 2 + 3;
gridContainer.y = (2732 - totalGridHeight) / 2 + cellHeight / 2 + 90;
boardBackground.x = totalGridWidth / 2 - cellWidth / 2;
boardBackground.y = totalGridHeight / 2 - cellHeight / 2 + 30;
game.calculateTargetPosition = function (col, row) {
	return {
		x: col * (cellWidth + gridSpacing),
		y: row * (cellHeight + gridSpacing)
	};
};
game.findConnectedNeighbors = function (cell, connectedNeighbors) {
	connectedNeighbors = connectedNeighbors || [];
	if (!cell) {
		return [];
	}
	var cellType = cell.type;
	var cellColRow = game.findCellColRow(cell);
	if (cellColRow) {
		var directions = [[-1, 0], [1, 0], [0, -1], [0, 1]];
		directions.forEach(function (dir) {
			var newRow = cellColRow.row + dir[0];
			var newCol = cellColRow.col + dir[1];
			if (newRow >= 0 && newRow < gridHeight && newCol >= 0 && newCol < gridWidth) {
				var neighborCell = grid[newCol][newRow];
				if (neighborCell && neighborCell.type === cellType && connectedNeighbors.indexOf(neighborCell) === -1) {
					connectedNeighbors.push(neighborCell);
					game.findConnectedNeighbors(neighborCell, connectedNeighbors);
				}
			}
		});
	}
	return connectedNeighbors;
};
game.findCellColRow = function (cell) {
	for (var col = 0; col < gridWidth; col++) {
		for (var row = 0; row < gridHeight; row++) {
			if (grid[col][row] === cell) {
				return {
					col: col,
					row: row
				};
			}
		}
	}
	return null;
};
game.deleteCell = function (cell) {
	var colRow = game.findCellColRow(cell);
	if (colRow) {
		grid[colRow.col][colRow.row] = null;
		game.createParticleEffect(cell.x, cell.y, cell.type);
		cell.destroy();
	}
};
game.attachCellListeners = function (cell) {
	cell.on('down', function (obj) {
		var connectedNeighbors = game.findConnectedNeighbors(cell);
		if (connectedNeighbors.length > 0) {
			score += 10 * connectedNeighbors.length + (connectedNeighbors.length - 2) * 5;
			LK.setScore(LK.getScore() + score);
			scoreText.setText(LK.getScore().toString());
			var cellsToDestroy = [cell].concat(connectedNeighbors);
			cellsToDestroy.forEach(function (cell) {
				game.deleteCell(cell);
			});
			game.moveToEmptySpace('down', false);
			game.moveToEmptySpace('left', true);
		}
	});
	cell.on('up', function (obj) {});
	cell.on('move', function (obj) {});
};
var grid = [];
var scoreText = new Text2(score.toString(), {
	size: 150,
	fill: "#ffffff",
	weight: '800',
	dropShadow: true,
	dropShadowColor: '#000000',
	dropShadowBlur: 4,
	dropShadowAngle: Math.PI / 6,
	dropShadowDistance: 6
});
scoreText.anchor.set(.5, 0);
LK.gui.topCenter.addChild(scoreText);
var lifeIndicator = new LifeIndicator(10);
lifeIndicator.y = 260;
LK.gui.topCenter.addChild(lifeIndicator);
for (var i = 0; i < gridWidth; i++) {
	grid[i] = [];
	for (var j = 0; j < gridHeight; j++) {
		var cell = new Cell(undefined, game.totalCellTypes);
		var targetPos = game.calculateTargetPosition(i, j);
		cell.move(targetPos.x, targetPos.y, true);
		game.attachCellListeners(cell);
		grid[i][j] = cell;
		gridContainer.addChild(cell);
	}
}
game.moveToEmptySpace = function (direction, rowMode) {
	var moved;
	do {
		moved = false;
		var dx = direction === 'left' ? 1 : direction === 'right' ? -1 : 0;
		var dy = direction === 'up' ? 1 : direction === 'down' ? -1 : 0;
		for (var col = 0; col < gridWidth; col++) {
			for (var row = 0; row < gridHeight; row++) {
				if (!grid[col][row]) {
					var isRowOrColumnEmpty = true;
					if (rowMode) {
						for (var checkIndex = 0; checkIndex < (direction === 'left' || direction === 'right' ? gridHeight : gridWidth); checkIndex++) {
							isRowOrColumnEmpty = isRowOrColumnEmpty && !grid[direction === 'left' || direction === 'right' ? col : checkIndex][direction === 'up' || direction === 'down' ? row : checkIndex];
						}
					}
					if (isRowOrColumnEmpty) {
						if (rowMode) {
							for (var checkIndex = 0; checkIndex < (direction === 'left' || direction === 'right' ? gridHeight : gridWidth); checkIndex++) {
								var targetCol = direction === 'left' || direction === 'right' ? col : checkIndex;
								var targetRow = direction === 'up' || direction === 'down' ? row : checkIndex;
								if (targetCol + dx >= 0 && targetCol + dx < gridWidth && targetRow + dy >= 0 && targetRow + dy < gridHeight && grid[targetCol + dx][targetRow + dy]) {
									var targetCell = grid[targetCol + dx][targetRow + dy];
									var targetPos = game.calculateTargetPosition(targetCol, targetRow);
									targetCell.move(targetPos.x, targetPos.y);
									grid[targetCol][targetRow] = targetCell;
									grid[targetCol + dx][targetRow + dy] = null;
									moved = true;
								}
							}
						} else {
							var targetCol = col + dx;
							var targetRow = row + dy;
							if (targetCol >= 0 && targetCol < gridWidth && targetRow >= 0 && targetRow < gridHeight && grid[targetCol][targetRow]) {
								var targetCell = grid[targetCol][targetRow];
								var targetPos = game.calculateTargetPosition(col, row);
								targetCell.move(targetPos.x, targetPos.y);
								grid[col][row] = targetCell;
								grid[targetCol][targetRow] = null;
								moved = true;
							}
						}
					}
				}
			}
		}
	} while (moved);
};
var maxSnowflakes = 100;
var snowflakeContainer = new Container();
game.addChildAt(snowflakeContainer, 1);
var snowflakes = [];
for (var i = 0; i < maxSnowflakes; i++) {
	var flake = new Snowflake();
	flake.x = Math.random() * 2048;
	flake.y = Math.random() * 2732;
	snowflakeContainer.addChild(flake);
	snowflakes.push(flake);
}
LK.on('tick', function () {
	for (var i = 0; i < gridWidth; i++) {
		for (var j = 0; j < gridHeight; j++) {
			if (grid[i][j]) {
				grid[i][j].tick();
			}
		}
	}
	for (var i = 0; i < particles.length; i++) {
		particles[i].tick();
	}
	for (var i = 0; i < snowflakes.length; i++) {
		snowflakes[i].tick();
	}
	var cellsAreMoving = grid.some(function (column) {
		return column.some(function (cell) {
			return cell && cell.isMoving;
		});
	});
	if (!cellsAreMoving && !game.hasPossibleMoves()) {
		game.totalCellTypes = Math.min(8, 3 + Math.floor(score / 2000));
		var tilesLeft = grid.reduce(function (acc, column) {
			return acc + column.filter(function (cell) {
				return cell !== null;
			}).length;
		}, 0);
		lifeIndicator.updateLives(lifeIndicator.lives - tilesLeft);
		if (lifeIndicator.lives <= 0) {
			LK.showGameOver();
		} else {
			game.resetBoard();
		}
	}
});