/**
 * @constructor
**/
function Definition(data) {
    /** @type {Array.<string>} */
    this.text = data["text"];
    /** @type {number} */
    this.direction = data["pos"];
}

/** @const */
Definition.RIGHT_HORIZONTAL = 1;
/** @const */
Definition.RIGHT_VERTICAL = 2;
/** @const */
Definition.BOTTOM_HORIZONTAL = 3;
/** @const */
Definition.BOTTOM_VERTICAL = 4;

/**
 * @constructor
**/
function Cell() {
    /** @type {boolean} */
    this.isBlack = false;
    /** @type {Array.<Definition>} */
    this.definitions = null;
}

Cell.prototype.update = function(data) {
    if (data["type"] === null) {
        this.isBlack = true;
    } else if (data["definitions"] !== undefined) {
        this.definitions = [];
        data["definitions"].forEach(function(definition) {
            this.definitions.push(new Definition(definition));
        }.bind(this));
    } else {
        // Grid letter
        // TODO return version
    }
    return 0;
};

/**
 * @constructor
**/
function Grid(data) {
    /** @type {string} */
    this.title = data["title"] || "";
    /** @type {number} */
    this.difficulty = data["difficulty"];
    /** @type {number} */
    this.width = data["w"];
    /** @type {number} */
    this.height = data["h"];

    this.grid = [];
    for (var i =0; i < this.width; i++) {
        this.grid[i] = [];
        for (var j =0; j < this.height; j++) {
            this.grid[i][j] = new Cell();
        }
    }
}

/**
 * @return {number|null}
**/
Grid.prototype.update = function(data) {
    var maxVersion = null
        ,grid = this.grid;

    data.forEach(function(cellData) {
        maxVersion = Math.max(maxVersion || 0, grid[cellData["x"]][cellData["y"]].update(cellData));
    });
    return maxVersion;
};