import Ember from 'ember';
import ENV from '../config/environment';

export default Ember.Service.extend({
  id: null,
  type: null,
  message: null,
  isVisible: false,

  isInfo: Ember.computed.equal('type', 'info'),
  isSuccess: Ember.computed.equal('type', 'success'),
  isWarning: Ember.computed.equal('type', 'warning'),
  isError: Ember.computed.equal('type', 'error'),

  _showToast: function(type, message) {
    var toastId = this.incrementProperty('id');
    this.setProperties({
      'type': type,
      'message': message,
      'isVisible': true
    });

    var displayTime = ENV.APP.TOAST_BASE_DISPLAY_TIME;
    displayTime += message.length * ENV.APP.TOAST_LENGTH_FACTOR;

    var self = this;
    Ember.run.later(function () {
      if (self.get('id') === toastId) {
        self.set('isVisible', false);
      }
    }, displayTime);
  },

  _setToast: function(type, message) {
    var self = this;

    if (this.get('isVisible')) {
      this.set('isVisible', false);
      Ember.run.later(function () {
        self._showToast(type, message);
      }, ENV.APP.TOAST_HIDE_ANIMATION_LENGTH);
    } else {
      this._showToast(type, message);
    }
  },

  // Public api

  info: function(message) {
    this._setToast('info', message);
  },

  success: function(message) {
    this._setToast('success', message);
  },

  warning: function(message) {
    this._setToast('warning', message);
  },

  error: function(message) {
    this._setToast('error', message);
  },

  apiError: function(reason) {
    reason = Ember.Object.create(reason);

    var errorMessage = gettext('Unknown error has occured.');

    if (reason.get('status') === 0) {
      errorMessage = gettext('Lost connection with application.');
    }

    if (reason.get('status') === 403) {
      errorMessage = reason.get('responseJSON.detail');
      if (errorMessage === 'Permission denied') {
        errorMessage = gettext("You don't have permission to perform this action.");
      }
    }

    if (reason.get('status') === 404) {
      errorMessage = gettext('Action link is invalid.');
    }

    this.error(errorMessage);
  }
});