# Author:: Adam Jacob (<adam@opscode.com>)
# Author:: William Albenzi (<walbenzi@gmail.com>)
# Copyright:: Copyright (c) 2009 Opscode, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

require 'chef/knife'

class Chef
  class Knife
    class RoleEnvRunListReplace < Knife

      deps do
        require 'chef/role'
        require 'chef/json_compat'
      end

      banner "knife role env_run_list replace [ROLE] [ENVIRONMENT] [OLD_ENTRY] [NEW_ENTRY] "

      def replace_in_env_run_list(role, environment, old_entry, new_entry)
        nlist = []
        role.run_list_for(environment).each do |entry| 
          if entry == old_entry
            nlist << new_entry
          else
            nlist << entry
          end
        end
        role.env_run_lists_add(environment => nlist)
      end

      def run
        role = Chef::Role.load(@name_args[0])
        role.name(@name_args[0])
        environment = @name_args[1]
        old_entry = @name_args[2]
        new_entry = @name_args[3]

        replace_in_env_run_list(role, environment, old_entry, new_entry)
        role.save
        config[:env_run_list] = true
        output(format_for_display(role))
      end

    end
  end
end
