module ChefCLI::Generator::TemplateHelper

def self.delegate_to_app_context(name)
  define_method(name) do
    ChefCLI::Generator.context.public_send(name)
  end
end

def license_description(comment = nil)
  case license
  when "all_rights", "none"
    result = "Copyright:: #{year}, #{copyright_holder}, All Rights Reserved."
  when "apachev2"
    result = <<~EOH
      Copyright:: #{year}, #{copyright_holder}
      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.
    EOH
  when "mit"
    result = <<~EOH
      The MIT License (MIT)
      Copyright:: #{year}, #{copyright_holder}
      Permission is hereby granted, free of charge, to any person obtaining a copy
      of this software and associated documentation files (the "Software"), to deal
      in the Software without restriction, including without limitation the rights
      to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
      copies of the Software, and to permit persons to whom the Software is
      furnished to do so, subject to the following conditions:
      The above copyright notice and this permission notice shall be included in
      all copies or substantial portions of the Software.
      THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
      IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
      AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
      OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
      THE SOFTWARE.
    EOH
  when "gplv2"
    result = <<~EOH
      Copyright:: #{year},  #{copyright_holder}
      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.
    EOH
  when "gplv3"
    result = <<~EOH
      Copyright:: #{year},  #{copyright_holder}
      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 3 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, see <http://www.gnu.org/licenses/>.
    EOH
  else
    raise ArgumentError, "Invalid generator.license setting: #{license}.  See available licenses at https://docs.chef.io/ctl_chef.html#chef-generate-cookbook"
  end
  if comment
    # Ensure there's no trailing whitespace
    result.gsub(/^(.+)$/, "#{comment} \\1").gsub(/^$/, "#{comment}").strip
  else
    result
  end
end

def year
  Time.now.year
end