/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

var o = null;

// TODO: https://github.com/MozillaSecurity/octo/issues/7

function Objects() {
  this.counter = 0;
  this.container = {};
}

Objects.prototype.add = function (category, member) {
  member = member ? member : "o" + this.counter;
  if (!this.has(category)) {
    this.container[category] = [];
  }
  this.container[category].push({type: category, name: member});
  ++this.counter;
  return this.container[category].slice(-1)[0].name;
};

Objects.prototype.get = function (category, last) {
  if (!(category in this.container)) {
    //return {type:null, name:null};
    Utils.traceback();
    throw new Error(category + " is not available.");
  }
  if (last) {
    return this.container[category].slice(-1)[0];
  }
  return Random.index(this.container[category]);
};

Objects.prototype.pick = function (category, last) {
  try {
    return this.get(category, last).name;
  } catch (e) {
    Utils.traceback();
    throw Logger.JSError("Error: pick(" + category + ") " + category + " is undefined.");
  }
};

Objects.prototype.pop = function (objectName) {
  var self = this;
  Utils.getKeysFromHash(this.container).forEach(function (category) {
    self.container[category].forEach(function (obj) {
      if (obj.name == objectName) {
        self.container[category].splice(self.container[category].indexOf(obj), 1);
      }
    });
  });
};

Objects.prototype.contains = function (categoryNames) {
  var categories = [], self = this;
  categoryNames.forEach(function (name) {
    if (self.has(name)) {
      categories.push(name);
    }
  });
  return (categories.length == 0) ? null : categories;
};

Objects.prototype.show = function (category) {
  return (category in this.container) ? this.container[category] : this.container;
};

Objects.prototype.count = function (category) {
  return (category in this.container) ? this.container[category].length : 0;
};

Objects.prototype.has = function (category) {
  if (category in this.container) {
    this.check(category);
    return !!(this.container[category].length > 0);
  }
  return false;
};

Objects.prototype.valid = function () {
  var items = [], self = this;
  Utils.getKeysFromHash(self.container).forEach(function (category) {
    self.check(category);
  });
  Utils.getKeysFromHash(self.container).forEach(function (category) {
    for (var i = 0; i < self.container[category].length; i++) {
      items.push(self.container[category][i].name);
    }
  });
  return items;
};

Objects.prototype.check = function (category) {
  var self = this;
  self.container[category].forEach(function (object) {
    try {
      var x = /*frame.contentWindow.*/eval(object.name);
      if (x === undefined || x == null) {
        self.pop(object.name);
      }
    } catch (e) {
      self.pop(object.name);
    }
  });
};