#-- encoding: UTF-8

#-- copyright
# OpenProject is an open source project management software.
# Copyright (C) 2012-2021 the OpenProject GmbH
#
# 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 docs/COPYRIGHT.rdoc for more details.
#++

module OpenProject
  module Configuration
    ##
    # To be included into OpenProject::Configuration in order to provide
    # helper methods for easier access to certain configuration options.
    module Helpers
      ##
      # Carrierwave storage type. Possible values are, among others, :file and :fog.
      # The latter requires further configuration.
      def attachments_storage
        (self['attachments_storage'] || 'file').to_sym
      end

      ##
      # We only allow direct uploads to S3 as we are using the carrierwave_direct
      # gem which only supports S3 for the time being.
      #
      # Do not allow direct uploads when using IAM-profile-based authorization rather
      # than access-key-based ones since carrierwave_direct does not support that.
      def direct_uploads
        return false unless remote_storage? && remote_storage_aws?
        return false if use_iam_profile?

        self['direct_uploads']
      end

      def direct_uploads?
        direct_uploads
      end

      # Augur connect host
      def enterprise_trial_creation_host
        if Rails.env.production?
          self['enterprise_trial_creation_host']
        else
          'https://augur.openproject-edge.com'
        end
      end

      def file_storage?
        attachments_storage == :file
      end

      def remote_storage?
        attachments_storage == :fog
      end

      def remote_storage_aws?
        fog_credentials[:provider] == "AWS"
      end

      def remote_storage_upload_host
        if remote_storage_aws?
          "#{fog_directory}.s3.amazonaws.com"
        end
      end

      def remote_storage_download_host
        if remote_storage_aws?
          "#{fog_directory}.s3.#{fog_credentials[:region]}.amazonaws.com"
        end
      end

      def remote_storage_hosts
        [remote_storage_upload_host, remote_storage_download_host].compact
      end

      def attachments_storage_path
        Rails.root.join(self['attachments_storage_path'] || 'files')
      end

      def use_iam_profile?
        fog_credentials[:use_iam_profile]
      end

      def fog_credentials
        Hash[(Hash(self['fog'])['credentials'] || {}).map { |key, value| [key.to_sym, value] }]
      end

      def fog_directory
        Hash(self['fog'])['directory']
      end

      def file_uploader
        available_file_uploaders[OpenProject::Configuration.attachments_storage.to_sym]
      end

      def hidden_menu_items
        menus = self['hidden_menu_items'].map do |label, nodes|
          [label, array(nodes)]
        end

        Hash[menus]
      end

      def disabled_modules
        array self['disabled_modules']
      end

      def blacklisted_routes
        array self['blacklisted_routes']
      end

      ##
      # Whether we're running a bim edition
      def bim?
        self['edition'] == 'bim'
      end

      def available_file_uploaders
        uploaders = {
          file: ::LocalFileUploader
        }

        # Do not load Fog uploader unless configured,
        # it will fail with missing configuration
        unless OpenProject::Configuration.fog_credentials.empty?
          uploaders[:fog] = '::FogFileUploader'.constantize
        end

        uploaders
      end

      def ldap_tls_options
        val = self['ldap_tls_options']
        val.presence || {}
      end

      private

      ##
      # Yields the given configuration value as an array.
      # Either the value already is an array or a string with values separated by spaces.
      # In the latter case the string will be split and the values returned as an array.
      def array(value)
        if value.is_a?(String) && value =~ / /
          value.split ' '
        else
          Array(value)
        end
      end
    end
  end
end