var Cell = Container.expand(function () {
	var self = Container.call(this);
	self.filled = false;
	var empty = self.createAsset('cell', 'Filled with a cell (empty)', .5, .5);
	empty.alpa = .8;
	var filled = self.createAsset('block', 'Filled with a block', .5, .5);
	empty.y = 2;
	self.setFill = function (isFilled) {
		self.filled = isFilled;
		empty.visible = !self.filled;
		filled.visible = self.filled;
	};
	self.setTint = function (tint) {
		empty.tint = filled.tint = tint;
	};
	self.setFill(false);
});
var Block = Container.expand(function (board) {
	var self = Container.call(this);
	var hsvToRgb = function (h, s, v) {
		var r, g, b;
		var i = Math.floor(h * 6);
		var f = h * 6 - i;
		var p = v * (1 - s);
		var q = v * (1 - f * s);
		var t = v * (1 - (1 - f) * s);
		switch (i % 6) {
			case 0:
				(r = v, g = t, b = p);
				break;
			case 1:
				(r = q, g = v, b = p);
				break;
			case 2:
				(r = p, g = v, b = t);
				break;
			case 3:
				(r = p, g = q, b = v);
				break;
			case 4:
				(r = t, g = p, b = v);
				break;
			case 5:
				(r = v, g = p, b = q);
				break;
		}
		return (Math.round(r * 255) << 16) + (Math.round(g * 255) << 8) + Math.round(b * 255);
	};
	var ShapeTypes = {
		SINGLE: [[1]],
		TRI: [[1, 1, 1]],
		QUAD: [[1, 1, 1, 1]],
		LSHAPE: [[1, 0, 0], [1, 0, 0], [1, 1, 1]],
		BLOCK: [[1, 1], [1, 1]],
		SMALLLSHAPE: [[1, 0], [1, 1]]
	};
	var shapes = Object.values(ShapeTypes);
	var offset = Math.floor(Math.random() * shapes.length);
	self.shape = shapes[offset];
	var hue = offset % shapes.length / shapes.length;
	self.color = hsvToRgb(hue, 0.6, 1);
	self.rotateShapeRandomly = function () {
		var rotations = Math.floor(Math.random() * 4);
		for (var r = 0; r < rotations; r++) {
			self.shape = self.shape[0].map((val, index) => self.shape.map(row => row[index]).reverse());
		}
	};
	self.rotateShapeRandomly();
	self.blocks = [];
	var background = self.createAsset('background', 'Background Graphics', .5, .5);
	background.alpha = 0;
	var blockSize = 160;
	background.width = 4 * blockSize;
	background.height = 4 * blockSize;
	self.addChild(background);
	self.offsetX = 0;
	self.offsetY = 0;
	var blockOffsetX = (background.width / 2 - self.shape[0].length * blockSize) / 2 - blockSize / 2;
	var blockOffsetY = (background.height / 2 - self.shape.length * blockSize) / 2 - blockSize / 2;
	for (var i = 0; i < self.shape.length; i++) {
		for (var j = 0; j < self.shape[i].length; j++) {
			if (self.shape[i][j] === 1) {
				var block = self.createAsset('block', 'Block Graphics', .5, .5);
				block.tint = self.color;
				block.width = blockSize;
				block.height = blockSize;
				block.x = j * blockSize + blockOffsetX;
				block.y = i * blockSize + blockOffsetY;
				self.blocks.push(block);
				self.addChild(block);
			}
		}
	}
	self.startX = 0;
	self.startY = 0;
	self.moveTowardsHomePosition = function () {
		var dx = self.startX - self.x;
		var dy = self.startY - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 1) {
			self.x += dx * 0.3;
			self.y += dy * 0.3;
		} else {
			self.x = self.startX;
			self.y = self.startY;
		}
	};
	var currentX = 0;
	var currentY = 0;
	self.moveToDragTarget = function () {
		var ox = -this.targetX;
		var oy = 300 - this.targetY;
		this.targetX += ox / 10;
		this.targetY += oy / 10;
		this.x = currentX;
		this.y = currentY;
	};
	self.move = function (x, y) {
		currentX = x;
		currentY = y;
		self.x = x - this.targetX;
		self.y = y - this.targetY;
	};
	self.setStartPosition = function (x, y) {
		self.startX = x;
		self.startY = y;
	};
	self.getOverlappingCells = function () {
		var cells = [];
		var boardPos = {
			x: -board.x + self.x + 160 * 4 + blockOffsetX + 160,
			y: -board.y + self.y + 160 * 4 + blockOffsetY + 160
		};
		var startX = Math.floor(boardPos.x / 160);
		var startY = Math.floor(boardPos.y / 160);
		for (var i = 0; i < self.shape.length; i++) {
			for (var j = 0; j < self.shape[i].length; j++) {
				if (self.shape[i][j] === 1) {
					var cell = board.grid && board.grid[startY + i] && board.grid[startY + i][startX + j];
					if (cell && !cell.filled) {
						cells.push(cell);
					} else {
						return null;
					}
				}
			}
		}
		return cells;
	};
	self.showOverlap = function () {
		var cells = self.getOverlappingCells();
		if (cells) {
			for (var a = 0; a < cells.length; a++) {
				var cell = cells[a];
				cell.setTint(self.color);
			}
		}
	};
	self.rotateShapeRandomly = function () {
		var rotations = Math.floor(Math.random() * 4);
		for (var r = 0; r < rotations; r++) {
			self.shape = self.shape[0].map((val, index) => self.shape.map(row => row[index]).reverse());
		}
	};
});
var Board = Container.expand(function () {
	var self = Container.call(this);
	var background = self.createAsset('background', 'Board outline', .5, .5);
	background.y = -20;
	background.alpha = .4;
	background.blendMode = 1;
	self.grid = new Array(10).fill(null).map(() => new Array(10).fill(null));
	var size = 158;
	var totalWidth = 10 * size;
	var totalHeight = 10 * size;
	for (var i = 0; i < 10; i++) {
		for (var j = 0; j < 10; j++) {
			var cell = new Cell();
			cell.x = i * size - totalWidth / 2 + size / 2;
			cell.y = j * size - totalHeight / 2 + size / 2;
			self.grid[j][i] = cell;
			self.addChild(cell);
		}
	}
	self.removeTint = function () {
		for (var i = 0; i < 10; i++) {
			for (var j = 0; j < 10; j++) {
				if (!self.grid[i][j].filled) {
					self.grid[i][j].setTint(0xffffff);
				}
			}
		}
	};
	self.checkLines = function () {
		var rowsRemoved = 0;
		for (var i = 0; i < 10; i++) {
			var rowFilled = true;
			var colFilled = true;
			for (var j = 0; j < 10; j++) {
				if (!self.grid[i][j].filled) rowFilled = false;
				if (!self.grid[j][i].filled) colFilled = false;
			}
			if (rowFilled || colFilled) {
				rowsRemoved += (rowFilled ? 1 : 0) + (colFilled ? 1 : 0);
				for (var j = 0; j < 10; j++) {
					if (rowFilled) self.grid[i][j].setFill(false);
					if (colFilled) self.grid[j][i].setFill(false);
				}
			}
		}
		return rowsRemoved;
	};
	self.placeBlock = function () {};
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	var gameBackground = self.createAsset('gameBackground', 'Background Graphics', .5, .5);
	gameBackground.x = 2048 / 2;
	gameBackground.y = 2732 / 2;
	var tilesBackground = self.createAsset('tileBackground', 'Board outline', .5, .5);
	tilesBackground.y = -20;
	tilesBackground.alpha = .4;
	tilesBackground.blendMode = 1;
	var blocks = [];
	var dragTarget;
	var board = self.addChild(new Board());
	board.x = 2048 / 2;
	board.y = 2732 / 2 - 250 + 30;
	tilesBackground.x = 2048 / 2;
	tilesBackground.y = 2732 - 300;
	var targetOffset;
	self.createBlock = function (index) {
		var block = new Block(board);
		block.x = 2048 / 2 + (index - 1) * (block.width + 30);
		block.y = 2732 + block.height;
		block.setStartPosition(block.x, 2732 - block.height / 2 - 30);
		blocks.push(block);
		self.addChild(block);
		block.on('down', function (obj) {
			dragTarget = this;
			var pos = obj.event.getLocalPosition(this);
			var targetPos = obj.event.getLocalPosition(self);
			this.targetX = pos.x;
			this.targetY = pos.y;
			dragTarget.move(targetPos.x, targetPos.y);
		});
	};
	stage.on('move', function (obj) {
		if (dragTarget) {
			board.removeTint();
			var pos = obj.event.getLocalPosition(self);
			dragTarget.move(pos.x, pos.y);
			dragTarget.showOverlap();
		}
	});
	stage.on('up', function (obj) {
		if (dragTarget) {
			var cells = dragTarget.getOverlappingCells();
			if (cells) {
				for (var a = 0; a < cells.length; a++) {
					cells[a].setFill(true);
					cells[a].setTint(dragTarget.color);
				}
				blocks[blocks.indexOf(dragTarget)] = undefined;
				dragTarget.destroy();
				if (!blocks.some(block => block)) {
					self.createBlocks();
				}
				var pointsToAdd = board.checkLines();
				if (pointsToAdd) {
					score += Math.pow(pointsToAdd, 2) * 10;
					scoreTxt.setText(score);
				}
			}
			board.removeTint();
			dragTarget = undefined;
		}
	});
	self.createBlocks = function () {
		for (var i = 0; i < 3; i++) {
			self.createBlock(i);
		}
	};
	var score = 0;
	self.createBlocks();
	var scoreTxt = new Text2('0', {
		size: 150,
		fill: "#ffffff",
		font: 'Impact',
		dropShadow: true,
		dropShadowColor: '#2a636e'
	});
	scoreTxt.anchor.set(.5, 0);
	LK.gui.topCenter.addChild(scoreTxt);
	self.isMovePossible = function () {
		for (var a = 0; a < blocks.length; a++) {
			if (blocks[a]) {
				for (var i = 0; i < 10; i++) {
					for (var j = 0; j < 10; j++) {
						if (board.grid[i][j].filled) continue;
						var canPlace = true;
						for (var k = 0; k < blocks[a].shape.length; k++) {
							for (var l = 0; l < blocks[a].shape[k].length; l++) {
								if (blocks[a].shape[k][l] === 1) {
									if (i + k < 0 || i + k >= 10 || j + l < 0 || j + l >= 10 || board.grid[i + k][j + l].filled) {
										canPlace = false;
										break;
									}
								}
							}
							if (!canPlace) break;
						}
						if (canPlace) return true;
					}
				}
			}
		}
		return false;
	};
	var isGameOver = false;
	LK.on('tick', function () {
		if (isGameOver || !self.isMovePossible()) {
			LK.effects.flashScreen(0xffffff, 1000);
			LK.showGameOver();
		}
		for (var a = blocks.length - 1; a >= 0; a--) {
			if (blocks[a]) {
				if (blocks[a] != dragTarget) {
					blocks[a].moveTowardsHomePosition();
				} else {
					blocks[a].moveToDragTarget();
				}
			}
		}
	});
});