//-- copyright
// OpenProject is a project management system.
// Copyright (C) 2012-2015 the OpenProject Foundation (OPF)
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License version 3.
//
// OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
// Copyright (C) 2006-2013 Jean-Philippe Lang
// Copyright (C) 2010-2013 the ChiliProject Team
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
//
// See doc/COPYRIGHT.rdoc for more details.
//++

// As the settings are transported from ruby code (gon)
// we can not enforce camel case here.

/* jshint camelcase: false */

module.exports = function(PathHelper, $q, $http) {

  // fetches configuration from the ApiV3 endpoint
  // TODO: this currently saves the request between page reloads,
  // but could easily be stored in localStorage
  var cache = false,
      path = PathHelper.apiConfigurationPath(),
      fetchSettings = function() {
        var data = $q.defer();
        $http.get(path).success(function(settings) {
          data.resolve(settings);
        }).error(function(err) {
          data.reject(err);
        });
        return data.promise;
      },
      api = function() {
        var settings = $q.defer();
        if (cache) {
          settings.resolve(cache);
        } else {
          fetchSettings().then(function(data) {
            cache = data;
            settings.resolve(data);
          });
        }
        return settings.promise;
      };

  var initSettings = function() {
    var settings = {},
        defaults = {
          enabled_modules: [],
          display: [],
          user_preferences: {
            impaired: false,
            time_zone: '',
            others: {
              comments_sorting: 'asc'
            }
          }
        };

    if (window.gon !== undefined) {
      settings = window.gon.settings;
    }

    return _.merge(defaults, settings);
  };

  return {
    settings: initSettings(),
    api: api,
    userPreferencesPresent: function() {
      return this.settings.hasOwnProperty('user_preferences');
    },
    displaySettingPresent: function(setting) {
      return this.settings.display.hasOwnProperty(setting) &&
        this.settings.display[setting] !== false;
    },
    accessibilityModeEnabled: function() {
      return this.settings.user_preferences.impaired;
    },
    commentsSortedInDescendingOrder: function() {
      return this.settings.user_preferences.others.comments_sorting === 'desc';
    },
    isTimezoneSet: function() {
      return this.settings.user_preferences.time_zone !== '';
    },
    timezone: function() {
      return this.settings.user_preferences.time_zone;
    },
    dateFormatPresent: function() {
      return this.displaySettingPresent('date_format') &&
             this.settings.display.date_format !== '';
    },
    dateFormat: function() {
      return this.settings.display.date_format;
    },
    timeFormatPresent: function() {
      return this.displaySettingPresent('time_format') &&
             this.settings.display.time_format !== '';
    },
    timeFormat: function() {
      return this.settings.display.time_format;
    },
    isModuleEnabled: function(module) {
      return this.settings.enabled_modules.indexOf(module) >= 0;
    },
    startOfWeekPresent: function() {
      return this.displaySettingPresent('start_of_week') &&
             this.settings.display.start_of_week !== '';
    },
    startOfWeek: function() {
      if(this.startOfWeekPresent()) {
        return this.settings.display.start_of_week;
      }

      // This if/else statement is used because
      // jquery regionals have different start day for German locale
      if(I18n.locale === 'en') {
        return 1;
      } else if(I18n.locale === 'de') {
        return 0;
      }

      return '';
    }
  };
};