module Devops
  module Version2_0
    module Handler
      class Key

        def self.get_keys
          lambda {
            check_privileges("key", "r")
            keys = settings.mongo.keys.map {|i| i.to_hash}
            keys.each {|k| k.delete("path")}   # We should not return path to the key
            json keys
          }
        end

        def self.create_key
          lambda {
            check_privileges("key", "w")
            key = create_object_from_json_body
            fname = check_filename(key["file_name"], "Parameter 'file_name' must be a not empty string")
            kname = check_string(key["key_name"], "Parameter 'key_name' should be a not empty string")
            content = check_string(key["content"], "Parameter 'content' should be a not empty string")
            file_name = File.join(settings.keys_dir, fname)
            halt(400, "File '#{fname}' already exist") if File.exists?(file_name)
            File.open(file_name, "w") do |f|
              f.write(content)
              f.chmod(0400)
            end

            key = Devops::Model::Key.new({"path" => file_name, "id" => kname})
            settings.mongo.key_insert key
            create_response("Created", nil, 201)
          }
        end

        def self.delete_key
          lambda {
            check_privileges("key", "w")
            servers = settings.mongo.servers_by_key params[:key]
            unless servers.empty?
              s_str = servers.map{|s| s.id}.join(", ")
              raise DependencyError.new "Deleting is forbidden: Key is used in servers: #{s_str}"
            end

            k = settings.mongo.key params[:key]
            begin
              FileUtils.rm(k.path)
            rescue
              logger.error "Missing key file for #{params[:key]} - #{k.filename}"
            end
            r = settings.mongo.key_delete params[:key]
            return [500, r["err"].inspect] unless r["err"].nil?
            create_response("Key '#{params[:key]}' removed")
          }
        end

      end
    end
  end
end