/**
 * Service which provides helper methods for performing some simple UI operations.
 */
angular.module('quay').factory('UIService', [function() {
  var CheckStateController = function(items, opt_checked) {
    this.items = items;
    this.checked = opt_checked || [];
    this.listeners_ = [];
  };

  CheckStateController.prototype.listen = function(callback) {
    this.listeners_.push(callback);
  };

  CheckStateController.prototype.isChecked = function(item) {
    return $.inArray(item, this.checked) >= 0;
  };

  CheckStateController.prototype.toggleItem = function(item) {
    if (this.isChecked(item)) {
      this.uncheckItem(item);
    } else {
      this.checkItem(item);
    }
  };

  CheckStateController.prototype.toggleItems = function() {
    if (this.checked.length) {
      this.checked = [];
    } else {
      this.checked = this.items.slice();
    }
    this.callListeners_();
  };

  CheckStateController.prototype.checkByFilter = function(filter) {
    this.checked = $.grep(this.items, filter);
    this.callListeners_();
  };

  CheckStateController.prototype.checkItem = function(item) {
    this.checked.push(item);
    this.callListeners_();
  };

  CheckStateController.prototype.uncheckItem = function(item) {
    this.checked = $.grep(this.checked, function(cItem) {
      return cItem != item;
    });
    this.callListeners_();
  };

  CheckStateController.prototype.callListeners_ = function() {
    var checked = this.checked;
    this.listeners_.map(function(listener) {
      listener(checked);
    });
  };

  var uiService = {};

  uiService.hidePopover = function(elem) {
    var popover = $(elem).data('bs.popover');
    if (popover) {
      popover.hide();
    }
  };

  uiService.showPopover = function(elem, content) {
    var popover = $(elem).data('bs.popover');
    if (!popover) {
      $(elem).popover({'content': '-', 'placement': 'left'});
    }

    setTimeout(function() {
      var popover = $(elem).data('bs.popover');
      popover.options.content = content;
      popover.show();
    }, 500);
  };

  uiService.showFormError = function(elem, result) {
    var message =  result.data['message'] || result.data['error_description'] || '';
    if (message) {
      uiService.showPopover(elem, message);
    } else {
      uiService.hidePopover(elem);
    }
  };

  uiService.createCheckStateController = function(items, opt_checked) {
    return new CheckStateController(items, opt_checked);
  };

  return uiService;
}]);