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# Redmine - project management software

# Copyright (C) 2006-2011  Jean-Philippe Lang

#

# 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.

module Redmine

  module Configuration

    # Configuration default values

    @defaults = {

      'email_delivery' => nil

    }

    @config = nil

    class << self

      # Loads the Redmine configuration file

      # Valid options:

      # * <tt>:file</tt>: the configuration file to load (default: config/configuration.yml)

      # * <tt>:env</tt>: the environment to load the configuration for (default: Rails.env)

      def load(options={})

        filename = options[:file] || File.join(Rails.root, 'config', 'configuration.yml')

        env = options[:env] || Rails.env

        @config = @defaults.dup

        load_deprecated_email_configuration(env)

        if File.file?(filename)

          @config.merge!(load_from_yaml(filename, env))

        end

        # Compatibility mode for those who copy email.yml over configuration.yml

        %w(delivery_method smtp_settings sendmail_settings).each do |key|

          if value = @config.delete(key)

            @config['email_delivery'] ||= {}

            @config['email_delivery'][key] = value

          end

        end

        if @config['email_delivery']

          ActionMailer::Base.perform_deliveries = true

          @config['email_delivery'].each do |k, v|

            v.symbolize_keys! if v.respond_to?(:symbolize_keys!)

            ActionMailer::Base.send("#{k}=", v)

          end

        end

        @config

      end

      # Returns a configuration setting

      def [](name)

        load unless @config

        @config[name]

      end

      # Yields a block with the specified hash configuration settings

      def with(settings)

        settings.stringify_keys!

        load unless @config

        was = settings.keys.inject({}) {|h,v| h[v] = @config[v]; h}

        @config.merge! settings

        yield if block_given?

        @config.merge! was

      end

      private

      def load_from_yaml(filename, env)

        yaml = nil

        begin

          yaml = YAML::load_file(filename)

        rescue ArgumentError

          $stderr.puts "Your Redmine configuration file located at #{filename} is not a valid YAML file and could not be loaded."

          exit 1

        end

        conf = {}

        if yaml.is_a?(Hash)

          if yaml['default']

            conf.merge!(yaml['default'])

          end

          if yaml[env]

            conf.merge!(yaml[env])

          end

        else

          $stderr.puts "Your Redmine configuration file located at #{filename} is not a valid Redmine configuration file."

          exit 1

        end

        conf

      end

      def load_deprecated_email_configuration(env)

        deprecated_email_conf = File.join(Rails.root, 'config', 'email.yml')

        if File.file?(deprecated_email_conf)

          warn "Storing outgoing emails configuration in config/email.yml is deprecated. You should now store it in config/configuration.yml using the email_delivery setting."

          @config.merge!({'email_delivery' => load_from_yaml(deprecated_email_conf, env)})

        end

      end

    end

  end

end