module.exports = function(crowi, app) {
  'use strict';

  var debug = require('debug')('growi:routes:admin')
    , logger = require('@alias/logger')('growi:routes:admin')
    , fs = require('fs')
    , models = crowi.models
    , Page = models.Page
    , PageGroupRelation = models.PageGroupRelation
    , User = models.User
    , ExternalAccount = models.ExternalAccount
    , UserGroup = models.UserGroup
    , UserGroupRelation = models.UserGroupRelation
    , Config = models.Config
    , GlobalNotificationSetting = models.GlobalNotificationSetting
    , GlobalNotificationMailSetting = models.GlobalNotificationMailSetting
    , GlobalNotificationSlackSetting = models.GlobalNotificationSlackSetting
    , PluginUtils = require('../plugins/plugin-utils')
    , pluginUtils = new PluginUtils()
    , ApiResponse = require('../util/apiResponse')
    , recommendedXssWhiteList = require('../util/recommendedXssWhiteList')

    , MAX_PAGE_LIST = 50
    , actions = {};

  function createPager(total, limit, page, pagesCount, maxPageList) {
    const pager = {
      page: page,
      pagesCount: pagesCount,
      pages: [],
      total: total,
      previous: null,
      previousDots: false,
      next: null,
      nextDots: false,
    };

    if (page > 1) {
      pager.previous = page - 1;
    }

    if (page < pagesCount) {
      pager.next = page + 1;
    }

    let pagerMin = Math.max(1, Math.ceil(page - maxPageList/2));
    let pagerMax = Math.min(pagesCount, Math.floor(page + maxPageList/2));
    if (pagerMin === 1) {
      if (MAX_PAGE_LIST < pagesCount) {
        pagerMax = MAX_PAGE_LIST;
      }
      else {
        pagerMax = pagesCount;
      }
    }
    if (pagerMax === pagesCount) {
      if ((pagerMax - MAX_PAGE_LIST) < 1) {
        pagerMin = 1;
      }
      else {
        pagerMin = pagerMax - MAX_PAGE_LIST;
      }
    }

    pager.previousDots = null;
    if (pagerMin > 1) {
      pager.previousDots = true;
    }

    pager.nextDots = null;
    if (pagerMax < pagesCount) {
      pager.nextDots = true;
    }

    for (let i = pagerMin; i <= pagerMax; i++) {
      pager.pages.push(i);
    }

    return pager;
  }

  actions.index = function(req, res) {
    return res.render('admin/index', {
      plugins: pluginUtils.listPlugins(crowi.rootDir),
    });
  };

  // app.get('/admin/app'                  , admin.app.index);
  actions.app = {};
  actions.app.index = function(req, res) {
    var settingForm;
    settingForm = Config.setupCofigFormData('crowi', req.config);

    return res.render('admin/app', {
      settingForm: settingForm,
    });
  };

  actions.app.settingUpdate = function(req, res) {
  };

  // app.get('/admin/security'                  , admin.security.index);
  actions.security = {};
  actions.security.index = function(req, res) {
    const settingForm = Config.setupCofigFormData('crowi', req.config);
    return res.render('admin/security', { settingForm });
  };

  // app.get('/admin/markdown'                  , admin.markdown.index);
  actions.markdown = {};
  actions.markdown.index = function(req, res) {
    const config = crowi.getConfig();
    const markdownSetting = Config.setupCofigFormData('markdown', config);

    return res.render('admin/markdown', {
      markdownSetting: markdownSetting,
      recommendedXssWhiteList: recommendedXssWhiteList,
    });
  };

  // app.post('/admin/markdown/lineBreaksSetting' , admin.markdown.lineBreaksSetting);
  actions.markdown.lineBreaksSetting = function(req, res) {
    var markdownSetting = req.form.markdownSetting;

    req.session.markdownSetting = markdownSetting;
    if (req.form.isValid) {
      Config.updateNamespaceByArray('markdown', markdownSetting, function(err, config) {
        Config.updateConfigCache('markdown', config);
        req.session.markdownSetting = null;
        req.flash('successMessage', ['Successfully updated!']);
        return res.redirect('/admin/markdown');
      });
    }
    else {
      req.flash('errorMessage', req.form.errors);
      return res.redirect('/admin/markdown');
    }
  };

  // app.post('/admin/markdown/xss-setting' , admin.markdown.xssSetting);
  actions.markdown.xssSetting = function(req, res) {
    let xssSetting = req.form.markdownSetting;

    xssSetting['markdown:xss:tagWhiteList'] = stringToArray(xssSetting['markdown:xss:tagWhiteList']);
    xssSetting['markdown:xss:attrWhiteList'] = stringToArray(xssSetting['markdown:xss:attrWhiteList']);

    req.session.markdownSetting = xssSetting;
    if (req.form.isValid) {
      Config.updateNamespaceByArray('markdown', xssSetting, function(err, config) {
        Config.updateConfigCache('markdown', config);
        req.session.xssSetting = null;
        req.flash('successMessage', ['Successfully updated!']);
        return res.redirect('/admin/markdown');
      });
    }
    else {
      req.flash('errorMessage', req.form.errors);
      return res.redirect('/admin/markdown');
    }
  };

  const stringToArray = (string) => {
    const array = string.split(',');
    return array.map(item => item.trim());
  };

  // app.get('/admin/customize' , admin.customize.index);
  actions.customize = {};
  actions.customize.index = function(req, res) {
    var settingForm;
    settingForm = Config.setupCofigFormData('crowi', req.config);

    const highlightJsCssSelectorOptions = {
      'github':           { name: '[Light] GitHub',         border: false },
      'github-gist':      { name: '[Light] GitHub Gist',    border: true },
      'atom-one-light':   { name: '[Light] Atom One Light', border: true },
      'xcode':            { name: '[Light] Xcode',          border: true },
      'vs':               { name: '[Light] Vs',             border: true },
      'atom-one-dark':    { name: '[Dark] Atom One Dark',   border: false },
      'hybrid':           { name: '[Dark] Hybrid',          border: false },
      'monokai':          { name: '[Dark] Monokai',         border: false },
      'tomorrow-night':   { name: '[Dark] Tomorrow Night',  border: false },
      'vs2015':           { name: '[Dark] Vs 2015',         border: false },
    };

    return res.render('admin/customize', {
      settingForm: settingForm,
      highlightJsCssSelectorOptions: highlightJsCssSelectorOptions
    });
  };

  // app.get('/admin/notification'               , admin.notification.index);
  actions.notification = {};
  actions.notification.index = async(req, res) => {
    const config = crowi.getConfig();
    const UpdatePost = crowi.model('UpdatePost');
    let slackSetting = Config.setupCofigFormData('notification', config);
    const hasSlackIwhUrl = Config.hasSlackIwhUrl(config);
    const hasSlackToken = Config.hasSlackToken(config);

    if (!Config.hasSlackIwhUrl(req.config)) {
      slackSetting['slack:incomingWebhookUrl'] = '';
    }

    if (req.session.slackSetting) {
      slackSetting = req.session.slackSetting;
      req.session.slackSetting = null;
    }

    const globalNotifications = await GlobalNotificationSetting.findAll();
    const userNotifications = await UpdatePost.findAll();

    return res.render('admin/notification', {
      userNotifications,
      slackSetting,
      hasSlackIwhUrl,
      hasSlackToken,
      globalNotifications,
    });
  };

  // app.post('/admin/notification/slackSetting' , admin.notification.slackauth);
  actions.notification.slackSetting = function(req, res) {
    var slackSetting = req.form.slackSetting;

    req.session.slackSetting = slackSetting;
    if (req.form.isValid) {
      Config.updateNamespaceByArray('notification', slackSetting, function(err, config) {
        Config.updateConfigCache('notification', config);
        req.flash('successMessage', ['Successfully Updated!']);
        req.session.slackSetting = null;

        // Re-setup
        crowi.setupSlack().then(function() {
          return res.redirect('/admin/notification');
        });
      });
    }
    else {
      req.flash('errorMessage', req.form.errors);
      return res.redirect('/admin/notification');
    }
  };

  // app.get('/admin/notification/slackAuth'     , admin.notification.slackauth);
  actions.notification.slackAuth = function(req, res) {
    const code = req.query.code;
    const config = crowi.getConfig();

    if (!code || !Config.hasSlackConfig(req.config)) {
      return res.redirect('/admin/notification');
    }

    const slack = crowi.slack;
    slack.getOauthAccessToken(code)
    .then(data => {
      debug('oauth response', data);
      Config.updateNamespaceByArray('notification', {'slack:token': data.access_token}, function(err, config) {
        if (err) {
          req.flash('errorMessage', ['Failed to save access_token. Please try again.']);
        }
        else {
          Config.updateConfigCache('notification', config);
          req.flash('successMessage', ['Successfully Connected!']);
        }

        return res.redirect('/admin/notification');
      });
    }).catch(err => {
      debug('oauth response ERROR', err);
      req.flash('errorMessage', ['Failed to fetch access_token. Please do connect again.']);
      return res.redirect('/admin/notification');
    });
  };

  actions.search = {};
  actions.search.index = function(req, res) {
    return res.render('admin/search', {
    });
  };

  // app.post('/admin/notification/slackIwhSetting' , admin.notification.slackIwhSetting);
  actions.notification.slackIwhSetting = function(req, res) {
    var slackIwhSetting = req.form.slackIwhSetting;

    if (req.form.isValid) {
      Config.updateNamespaceByArray('notification', slackIwhSetting, function(err, config) {
        Config.updateConfigCache('notification', config);
        req.flash('successMessage', ['Successfully Updated!']);

        // Re-setup
        crowi.setupSlack().then(function() {
          return res.redirect('/admin/notification#slack-incoming-webhooks');
        });
      });
    }
    else {
      req.flash('errorMessage', req.form.errors);
      return res.redirect('/admin/notification#slack-incoming-webhooks');
    }
  };

  // app.post('/admin/notification/slackSetting/disconnect' , admin.notification.disconnectFromSlack);
  actions.notification.disconnectFromSlack = function(req, res) {
    const config = crowi.getConfig();
    const slack = crowi.slack;

    Config.updateNamespaceByArray('notification', {'slack:token': ''}, function(err, config) {
      Config.updateConfigCache('notification', config);
      req.flash('successMessage', ['Successfully Disconnected!']);

      return res.redirect('/admin/notification');
    });
  };

  actions.globalNotification = {};
  actions.globalNotification.detail = async(req, res) => {
    const notificationSettingId = req.params.id;
    let renderVars = {};

    if (notificationSettingId) {
      try {
        renderVars.setting = await GlobalNotificationSetting.findOne({_id: notificationSettingId});
      }
      catch (err) {
        logger.error(`Error in finding a global notification setting with {_id: ${notificationSettingId}}`);
      }
    }

    return res.render('admin/global-notification-detail', renderVars);
  };

  actions.globalNotification.create = (req, res) => {
    const form = req.form.notificationGlobal;
    let setting;

    switch (form.notifyToType) {
      case 'mail':
        setting = new GlobalNotificationMailSetting(crowi);
        setting.toEmail = form.toEmail;
        break;
      // case 'slack':
      //   setting = new GlobalNotificationSlackSetting(crowi);
      //   setting.slackChannels = form.slackChannels;
      //   break;
      default:
        logger.error('GlobalNotificationSetting Type Error: undefined type');
        req.flash('errorMessage', 'Error occurred in creating a new global notification setting: undefined notification type');
        return res.redirect('/admin/notification#global-notification');
    }

    setting.triggerPath = form.triggerPath;
    setting.triggerEvents = getNotificationEvents(form);
    setting.save();

    return res.redirect('/admin/notification#global-notification');
  };

  actions.globalNotification.update = async(req, res) => {
    const form = req.form.notificationGlobal;
    const setting = await GlobalNotificationSetting.findOne({_id: form.id});

    switch (form.notifyToType) {
      case 'mail':
        setting.toEmail = form.toEmail;
        break;
      // case 'slack':
      //   setting.slackChannels = form.slackChannels;
      //   break;
      default:
        logger.error('GlobalNotificationSetting Type Error: undefined type');
        req.flash('errorMessage', 'Error occurred in updating the global notification setting: undefined notification type');
        return res.redirect('/admin/notification#global-notification');
    }

    setting.triggerPath = form.triggerPath;
    setting.triggerEvents = getNotificationEvents(form);
    setting.save();

    return res.redirect('/admin/notification#global-notification');
  };

  actions.globalNotification.remove = async(req, res) => {
    const id = req.params.id;

    try {
      await GlobalNotificationSetting.findOneAndRemove({_id: id});
      return res.redirect('/admin/notification#global-notification');
    }
    catch (err) {
      req.flash('errorMessage', 'Error in deleting global notification setting');
      return res.redirect('/admin/notification#global-notification');
    }
  };

  const getNotificationEvents = (form) => {
    let triggerEvents = [];
    const triggerEventKeys = Object.keys(form).filter(key => key.match(/^triggerEvent/));
    triggerEventKeys.forEach(key => {
      if (form[key]) {
        triggerEvents.push(form[key]);
      }
    });
    return triggerEvents;
  };

  actions.search.buildIndex = function(req, res) {
    var search = crowi.getSearcher();
    if (!search) {
      return res.redirect('/admin');
    }

    return new Promise(function(resolve, reject) {
      search.deleteIndex()
        .then(function(data) {
          debug('Index deleted.');
          resolve();
        }).catch(function(err) {
          debug('Delete index Error, but if it is initialize, its ok.', err);
          resolve();
        });
    })
    .then(function() {
      return search.buildIndex();
    })
    .then(function(data) {
      if (!data.errors) {
        debug('Index created.');
      }
      return search.addAllPages();
    })
    .then(function(data) {
      if (!data.errors) {
        debug('Data is successfully indexed.');
        req.flash('successMessage', 'Data is successfully indexed.');
      }
      else {
        debug('Data index error.', data.errors);
        req.flash('errorMessage', `Data index error: ${data.errors}`);
      }
      return res.redirect('/admin/search');
    })
    .catch(function(err) {
      debug('Error', err);
      req.flash('errorMessage', `Error: ${err}`);
      return res.redirect('/admin/search');
    });
  };

  actions.user = {};
  actions.user.index = function(req, res) {
    var page = parseInt(req.query.page) || 1;

    User.findUsersWithPagination({page: page}, function(err, result) {
      const pager = createPager(result.total, result.limit, result.page, result.pages, MAX_PAGE_LIST);

      return res.render('admin/users', {
        users: result.docs,
        pager: pager
      });
    });
  };

  actions.user.invite = function(req, res) {
    var form = req.form.inviteForm;
    var toSendEmail = form.sendEmail || false;
    if (req.form.isValid) {
      User.createUsersByInvitation(form.emailList.split('\n'), toSendEmail, function(err, userList) {
        if (err) {
          req.flash('errorMessage', req.form.errors.join('\n'));
        }
        else {
          req.flash('createdUser', userList);
        }
        return res.redirect('/admin/users');
      });
    }
    else {
      req.flash('errorMessage', req.form.errors.join('\n'));
      return res.redirect('/admin/users');
    }
  };

  actions.user.makeAdmin = function(req, res) {
    var id = req.params.id;
    User.findById(id, function(err, userData) {
      userData.makeAdmin(function(err, userData) {
        if (err === null) {
          req.flash('successMessage', userData.name + 'さんのアカウントを管理者に設定しました。');
        }
        else {
          req.flash('errorMessage', '更新に失敗しました。');
          debug(err, userData);
        }
        return res.redirect('/admin/users');
      });
    });
  };

  actions.user.removeFromAdmin = function(req, res) {
    var id = req.params.id;
    User.findById(id, function(err, userData) {
      userData.removeFromAdmin(function(err, userData) {
        if (err === null) {
          req.flash('successMessage', userData.name + 'さんのアカウントを管理者から外しました。');
        }
        else {
          req.flash('errorMessage', '更新に失敗しました。');
          debug(err, userData);
        }
        return res.redirect('/admin/users');
      });
    });
  };

  actions.user.activate = function(req, res) {
    var id = req.params.id;
    User.findById(id, function(err, userData) {
      userData.statusActivate(function(err, userData) {
        if (err === null) {
          req.flash('successMessage', userData.name + 'さんのアカウントを有効化しました');
        }
        else {
          req.flash('errorMessage', '更新に失敗しました。');
          debug(err, userData);
        }
        return res.redirect('/admin/users');
      });
    });
  };

  actions.user.suspend = function(req, res) {
    var id = req.params.id;

    User.findById(id, function(err, userData) {
      userData.statusSuspend(function(err, userData) {
        if (err === null) {
          req.flash('successMessage', userData.name + 'さんのアカウントを利用停止にしました');
        }
        else {
          req.flash('errorMessage', '更新に失敗しました。');
          debug(err, userData);
        }
        return res.redirect('/admin/users');
      });
    });
  };

  actions.user.remove = function(req, res) {
    const id = req.params.id;
    let username = '';

    return new Promise((resolve, reject) => {
      User.findById(id, (err, userData) => {
        username = userData.username;
        return resolve(userData);
      });
    })
    .then((userData) => {
      return new Promise((resolve, reject) => {
        userData.statusDelete((err, userData) => {
          if (err) {
            reject(err);
          }
          resolve(userData);
        });
      });
    })
    .then((userData) => {
      // remove all External Accounts
      return ExternalAccount.remove({user: userData}).then(() => userData);
    })
    .then((userData) => {
      return Page.removePageByPath(`/user/${username}`).then(() => userData);
    })
    .then((userData) => {
      req.flash('successMessage', `${username} さんのアカウントを削除しました`);
      return res.redirect('/admin/users');
    })
    .catch((err) => {
      req.flash('errorMessage', '削除に失敗しました。');
      return res.redirect('/admin/users');
    });
  };

  // これやったときの relation の挙動未確認
  actions.user.removeCompletely = function(req, res) {
    // ユーザーの物理削除
    var id = req.params.id;

    User.removeCompletelyById(id, function(err, removed) {
      if (err) {
        debug('Error while removing user.', err, id);
        req.flash('errorMessage', '完全な削除に失敗しました。');
      }
      else {
        req.flash('successMessage', '削除しました');
      }
      return res.redirect('/admin/users');
    });
  };

  // app.post('/_api/admin/users.resetPassword' , admin.api.usersResetPassword);
  actions.user.resetPassword = function(req, res) {
    const id = req.body.user_id;
    const User = crowi.model('User');

    User.resetPasswordByRandomString(id)
    .then(function(data) {
      data.user = User.filterToPublicFields(data.user);
      return res.json(ApiResponse.success(data));
    }).catch(function(err) {
      debug('Error on reseting password', err);
      return res.json(ApiResponse.error('Error'));
    });
  };

  actions.externalAccount = {};
  actions.externalAccount.index = function(req, res) {
    const page = parseInt(req.query.page) || 1;

    ExternalAccount.findAllWithPagination({page})
      .then((result) => {
        const pager = createPager(result.total, result.limit, result.page, result.pages, MAX_PAGE_LIST);

        return res.render('admin/external-accounts', {
          accounts: result.docs,
          pager: pager
        });
      });
  };

  actions.externalAccount.remove = function(req, res) {
    const accountId = req.params.id;

    ExternalAccount.findOneAndRemove({accountId})
      .then((result) => {
        if (result == null) {
          req.flash('errorMessage', '削除に失敗しました。');
          return res.redirect('/admin/users/external-accounts');
        }
        else {
          req.flash('successMessage', `外部アカウント '${accountId}' を削除しました`);
          return res.redirect('/admin/users/external-accounts');
        }
      });
  };

  actions.userGroup = {};
  actions.userGroup.index = function(req, res) {
    var page = parseInt(req.query.page) || 1;
    var renderVar = {
      userGroups: [],
      userGroupRelations: new Map(),
      pager: null,
    };

    UserGroup.findUserGroupsWithPagination({ page: page })
      .then((result) => {
        const pager = createPager(result.total, result.limit, result.page, result.pages, MAX_PAGE_LIST);
        var userGroups = result.docs;
        renderVar.userGroups = userGroups;
        renderVar.pager = pager;
        return userGroups.map((userGroup) => {
          return new Promise((resolve, reject) => {
            UserGroupRelation.findAllRelationForUserGroup(userGroup)
            .then((relations) => {
              return resolve([userGroup, relations]);
            });
          });
        });
      })
      .then((allRelationsPromise) => {
        return Promise.all(allRelationsPromise);
      })
      .then((relations) => {
        renderVar.userGroupRelations = new Map(relations);
        debug('in findUserGroupsWithPagination findAllRelationForUserGroupResult', renderVar.userGroupRelations);
        return res.render('admin/user-groups', renderVar);
      })
      .catch( function(err) {
        debug('Error on find all relations', err);
        return res.json(ApiResponse.error('Error'));
      });
  };

  // グループ詳細
  actions.userGroup.detail = function(req, res) {
    const userGroupId = req.params.id;
    const renderVar = {
      userGroup: null,
      userGroupRelations: [],
      pageGroupRelations: [],
      notRelatedusers: []
    };
    let targetUserGroup = null;
    UserGroup.findOne({ _id: userGroupId})
      .then(function(userGroup) {
        targetUserGroup = userGroup;
        if (targetUserGroup == null) {
          req.flash('errorMessage', 'グループがありません');
          throw new Error('no userGroup is exists. ', name);
        }
        else {
          renderVar.userGroup = targetUserGroup;

          return Promise.all([
            // get all user and group relations
            UserGroupRelation.findAllRelationForUserGroup(targetUserGroup),
            // get all page and group relations
            PageGroupRelation.findAllRelationForUserGroup(targetUserGroup),
            // get all not related users for group
            UserGroupRelation.findUserByNotRelatedGroup(targetUserGroup),
          ]);
        }
      })
      .then((resolves) => {
        renderVar.userGroupRelations = resolves[0];
        renderVar.pageGroupRelations = resolves[1];
        renderVar.notRelatedusers = resolves[2];
        debug('notRelatedusers', renderVar.notRelatedusers);

        return res.render('admin/user-group-detail', renderVar);
      })
      .catch((err) => {
        req.flash('errorMessage', 'ユーザグループの検索に失敗しました');
        debug('Error on get userGroupDetail', err);
        return res.redirect('/admin/user-groups');
      });
  };

  //グループの生成
  actions.userGroup.create = function(req, res) {
    const form = req.form.createGroupForm;
    if (req.form.isValid) {
      const userGroupName = crowi.xss.process(form.userGroupName);

      UserGroup.createGroupByName(userGroupName)
        .then((newUserGroup) => {
          req.flash('successMessage', newUserGroup.name);
          req.flash('createdUserGroup', newUserGroup);
          return res.redirect('/admin/user-groups');
        })
        .catch((err) => {
          debug('create userGroup error:', err);
          req.flash('errorMessage', '同じグループ名が既に存在します。');
        });
    }
    else {
      req.flash('errorMessage', req.form.errors.join('\n'));
      return res.redirect('/admin/user-groups');
    }
  };

  //
  actions.userGroup.update = function(req, res) {

    const userGroupId = req.params.userGroupId;
    const name = crowi.xss.process(req.body.name);

    UserGroup.findById(userGroupId)
    .then((userGroupData) => {
      if (userGroupData == null) {
        req.flash('errorMessage', 'グループの検索に失敗しました。');
        return new Promise();
      }
      else {
        // 名前存在チェック
        return UserGroup.isRegisterableName(name)
        .then((isRegisterableName) => {
          // 既に存在するグループ名に更新しようとした場合はエラー
          if (!isRegisterableName) {
            req.flash('errorMessage', 'グループ名が既に存在します。');
          }
          else {
            return userGroupData.updateName(name)
            .then(() => {
              req.flash('successMessage', 'グループ名を更新しました。');
            })
            .catch((err) => {
              req.flash('errorMessage', 'グループ名の更新に失敗しました。');
            });
          }
        });
      }
    })
    .then(() => {
      return res.redirect('/admin/user-group-detail/' + userGroupId);
    });
  };

  actions.userGroup.uploadGroupPicture = function(req, res) {
    var fileUploader = require('../util/fileUploader')(crowi, app);
    //var storagePlugin = new pluginService('storage');
    //var storage = require('../service/storage').StorageService(config);

    var userGroupId = req.params.userGroupId;

    var tmpFile = req.file || null;
    if (!tmpFile) {
      return res.json({
        'status': false,
        'message': 'File type error.'
      });
    }

    UserGroup.findById(userGroupId, function(err, userGroupData) {
      if (!userGroupData) {
        return res.json({
          'status': false,
          'message': 'UserGroup error.'
        });
      }

      var tmpPath = tmpFile.path;
      var filePath = UserGroup.createUserGroupPictureFilePath(userGroupData, tmpFile.filename + tmpFile.originalname);
      var acceptableFileType = /image\/.+/;

      if (!tmpFile.mimetype.match(acceptableFileType)) {
        return res.json({
          'status': false,
          'message': 'File type error. Only image files is allowed to set as user picture.',
        });
      }

      var tmpFileStream = fs.createReadStream(tmpPath, { flags: 'r', encoding: null, fd: null, mode: '0666', autoClose: true });

      fileUploader.uploadFile(filePath, tmpFile.mimetype, tmpFileStream, {})
        .then(function(data) {
          var imageUrl = fileUploader.generateUrl(filePath);
          userGroupData.updateImage(imageUrl)
          .then(() => {
            fs.unlink(tmpPath, function(err) {
              if (err) {
                debug('Error while deleting tmp file.', err);
              }

              return res.json({
                'status': true,
                'url': imageUrl,
                'message': '',
              });
            });
          });
        }).catch(function(err) {
          debug('Uploading error', err);

          return res.json({
            'status': false,
            'message': 'Error while uploading to ',
          });
        });
    });

  };

  actions.userGroup.deletePicture = function(req, res) {

    const userGroupId = req.params.userGroupId;
    let userGroupName = null;

    UserGroup.findById(userGroupId)
    .then((userGroupData) => {
      if (userGroupData == null) {
        return Promise.reject();
      }
      else {
        userGroupName = userGroupData.name;
        return userGroupData.deleteImage();
      }
    })
    .then((updated) => {
      req.flash('successMessage', 'Deleted group picture');

      return res.redirect('/admin/user-group-detail/' + userGroupId);
    })
    .catch((err) => {
      debug('An error occured.', err);

      req.flash('errorMessage', 'Error while deleting group picture');
      if (userGroupName == null) {
        return res.redirect('/admin/user-groups/');
      }
      else {
        return res.redirect('/admin/user-group-detail/' + userGroupId);
      }
    });
  };

  // app.post('/_api/admin/user-group/delete' , admin.userGroup.removeCompletely);
  actions.userGroup.removeCompletely = function(req, res) {
    const id = req.body.user_group_id;

    const fileUploader = require('../util/fileUploader')(crowi, app);

    UserGroup.removeCompletelyById(id)
      //// TODO remove attachments
      // couldn't remove because filePath includes '/uploads/uploads'
      // Error: ENOENT: no such file or directory, unlink 'C:\dev\growi\public\uploads\uploads\userGroup\5b1df18ab69611651cc71495.png
      //
      // .then(removed => {
      //   if (removed.image != null) {
      //     fileUploader.deleteFile(null, removed.image);
      //   }
      // })
      .then(() => {
        req.flash('successMessage', '削除しました');
        return res.redirect('/admin/user-groups');
      })
      .catch((err) => {
        debug('Error while removing userGroup.', err, id);
        req.flash('errorMessage', '完全な削除に失敗しました。');
        return res.redirect('/admin/user-groups');
      });
  };

  actions.userGroupRelation = {};
  actions.userGroupRelation.index = function(req, res) {

  };

  actions.userGroupRelation.create = function(req, res) {
    const User = crowi.model('User');
    const UserGroup = crowi.model('UserGroup');
    const UserGroupRelation = crowi.model('UserGroupRelation');

    // req params
    const userName = req.body.user_name;
    const userGroupId = req.body.user_group_id;

    let user = null;
    let userGroup = null;

    Promise.all([
      // ユーザグループをIDで検索
      UserGroup.findById(userGroupId),
      // ユーザを名前で検索
      User.findUserByUsername(userName),
    ])
    .then((resolves) => {
      userGroup = resolves[0];
      user = resolves[1];
      // Relation を作成
      UserGroupRelation.createRelation(userGroup, user);
    })
    .then((result) => {
      return res.redirect('/admin/user-group-detail/' + userGroup.id);
    }).catch((err) => {
      debug('Error on create user-group relation', err);
      req.flash('errorMessage', 'Error on create user-group relation');
      return res.redirect('/admin/user-group-detail/' + userGroup.id);
    });
  };

  actions.userGroupRelation.remove = function(req, res) {
    const UserGroupRelation = crowi.model('UserGroupRelation');
    const userGroupId = req.params.id;
    const relationId = req.params.relationId;

    UserGroupRelation.removeById(relationId)
    .then(() =>{
      return res.redirect('/admin/user-group-detail/' + userGroupId);
    })
    .catch((err) => {
      debug('Error on remove user-group-relation', err);
      req.flash('errorMessage', 'グループのユーザ削除に失敗しました。');
    });

  };

  actions.api = {};
  actions.api.appSetting = function(req, res) {
    var form = req.form.settingForm;

    if (req.form.isValid) {
      debug('form content', form);

      // mail setting ならここで validation
      if (form['mail:from']) {
        validateMailSetting(req, form, function(err, data) {
          debug('Error validate mail setting: ', err, data);
          if (err) {
            req.form.errors.push('SMTPを利用したテストメール送信に失敗しました。設定をみなおしてください。');
            return res.json({status: false, message: req.form.errors.join('\n')});
          }

          return saveSetting(req, res, form);
        });
      }
      else {
        return saveSetting(req, res, form);
      }
    }
    else {
      return res.json({status: false, message: req.form.errors.join('\n')});
    }
  };

  actions.api.securitySetting = function(req, res) {
    const form = req.form.settingForm;

    if (req.form.isValid) {
      debug('form content', form);
      return saveSetting(req, res, form);
    }
    else {
      return res.json({status: false, message: req.form.errors.join('\n')});
    }
  };

  actions.api.securityPassportLdapSetting = function(req, res) {
    var form = req.form.settingForm;

    if (!req.form.isValid) {
      return res.json({status: false, message: req.form.errors.join('\n')});
    }

    debug('form content', form);
    return saveSettingAsync(form)
      .then(() => {
        const config = crowi.getConfig();

        // reset strategy
        crowi.passportService.resetLdapStrategy();
        // setup strategy
        if (Config.isEnabledPassportLdap(config)) {
          crowi.passportService.setupLdapStrategy(true);
        }
        return;
      })
      .then(() => {
        res.json({status: true});
      });
  };

  actions.api.securityPassportGoogleSetting = async(req, res) => {
    const form = req.form.settingForm;

    if (!req.form.isValid) {
      return res.json({status: false, message: req.form.errors.join('\n')});
    }

    debug('form content', form);
    await saveSettingAsync(form);
    const config = await crowi.getConfig();

    // reset strategy
    await crowi.passportService.resetGoogleStrategy();
    // setup strategy
    if (Config.isEnabledPassportGoogle(config)) {
      try {
        await crowi.passportService.setupGoogleStrategy(true);
      }
      catch (err) {
        // reset
        await crowi.passportService.resetGoogleStrategy();
        return res.json({status: false, message: err.message});
      }
    }

    return res.json({status: true});
  };

  actions.api.securityPassportGitHubSetting = async(req, res) => {
    const form = req.form.settingForm;

    if (!req.form.isValid) {
      return res.json({status: false, message: req.form.errors.join('\n')});
    }

    debug('form content', form);
    await saveSettingAsync(form);
    const config = await crowi.getConfig();

    // reset strategy
    await crowi.passportService.resetGitHubStrategy();
    // setup strategy
    if (Config.isEnabledPassportGitHub(config)) {
      try {
        await crowi.passportService.setupGitHubStrategy(true);
      }
      catch (err) {
        // reset
        await crowi.passportService.resetGitHubStrategy();
        return res.json({status: false, message: err.message});
      }
    }

    return res.json({status: true});
  };

  actions.api.customizeSetting = function(req, res) {
    const form = req.form.settingForm;

    if (req.form.isValid) {
      debug('form content', form);
      return saveSetting(req, res, form);
    }
    else {
      return res.json({status: false, message: req.form.errors.join('\n')});
    }
  };

  actions.api.customizeSetting = function(req, res) {
    const form = req.form.settingForm;

    if (req.form.isValid) {
      debug('form content', form);
      return saveSetting(req, res, form);
    }
    else {
      return res.json({status: false, message: req.form.errors.join('\n')});
    }
  };

  // app.post('/_api/admin/notifications.add'    , admin.api.notificationAdd);
  actions.api.notificationAdd = function(req, res) {
    var UpdatePost = crowi.model('UpdatePost');
    var pathPattern = req.body.pathPattern;
    var channel = req.body.channel;

    debug('notification.add', pathPattern, channel);
    UpdatePost.create(pathPattern, channel, req.user)
    .then(function(doc) {
      debug('Successfully save updatePost', doc);

      // fixme: うーん
      doc.creator = doc.creator._id.toString();
      return res.json(ApiResponse.success({updatePost: doc}));
    }).catch(function(err) {
      debug('Failed to save updatePost', err);
      return res.json(ApiResponse.error());
    });
  };

  // app.post('/_api/admin/notifications.remove' , admin.api.notificationRemove);
  actions.api.notificationRemove = function(req, res) {
    var UpdatePost = crowi.model('UpdatePost');
    var id = req.body.id;

    UpdatePost.remove(id)
    .then(function() {
      debug('Successfully remove updatePost');

      return res.json(ApiResponse.success({}));
    }).catch(function(err) {
      debug('Failed to remove updatePost', err);
      return res.json(ApiResponse.error());
    });
  };

  // app.get('/_api/admin/users.search' , admin.api.userSearch);
  actions.api.usersSearch = function(req, res) {
    const User = crowi.model('User');
    const email =req.query.email;

    User.findUsersByPartOfEmail(email, {})
    .then(users => {
      const result = {
        data: users
      };
      return res.json(ApiResponse.success(result));
    }).catch(err => {
      return res.json(ApiResponse.error());
    });
  };

  actions.api.toggleIsEnabledForGlobalNotification = async(req, res) => {
    const id = req.query.id;
    const isEnabled = (req.query.isEnabled == 'true');

    try {
      if (isEnabled) {
        await GlobalNotificationSetting.enable(id);
      }
      else {
        await GlobalNotificationSetting.disable(id);
      }

      return res.json(ApiResponse.success());
    }
    catch (err) {
      return res.json(ApiResponse.error());
    }
  };

  /**
   * save settings, update config cache, and response json
   *
   * @param {any} req
   * @param {any} res
   * @param {any} form
   */
  function saveSetting(req, res, form) {
    Config.updateNamespaceByArray('crowi', form, function(err, config) {
      Config.updateConfigCache('crowi', config);
      return res.json({status: true});
    });
  }

  /**
   * save settings, update config cache ONLY. (this method don't response json)
   *
   * @param {any} form
   * @returns
   */
  function saveSettingAsync(form) {
    return new Promise((resolve, reject) => {
      Config.updateNamespaceByArray('crowi', form, (err, config) => {
        if (err) {
          return reject(err);
        }

        Config.updateConfigCache('crowi', config);
        return resolve();
      });
    });
  }

  function validateMailSetting(req, form, callback) {
    var mailer = crowi.mailer;
    var option = {
      host: form['mail:smtpHost'],
      port: form['mail:smtpPort'],
    };
    if (form['mail:smtpUser'] && form['mail:smtpPassword']) {
      option.auth = {
        user: form['mail:smtpUser'],
        pass: form['mail:smtpPassword'],
      };
    }
    if (option.port === 465) {
      option.secure = true;
    }

    var smtpClient = mailer.createSMTPClient(option);
    debug('mailer setup for validate SMTP setting', smtpClient);

    smtpClient.sendMail({
      from: form['mail:from'],
      to: req.user.email,
      subject: 'Wiki管理設定のアップデートによるメール通知',
      text: 'このメールは、WikiのSMTP設定のアップデートにより送信されています。'
    }, callback);
  }


  return actions;
};