# frozen_string_literal: true

# Copyright 2016-2021 Copado NCS LLC
#
# 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 "kitchen/transport/exec"

module Kitchen
  module Terraform
    module Transport
      # Terraform commands are run by shelling out and using the
      # {https://www.terraform.io/docs/commands/index.html command-line interface}.
      #
      # The shell out environment includes the TF_IN_AUTOMATION environment variable as specified by the
      # {https://www.terraform.io/guides/running-terraform-in-automation.html#controlling-terraform-output-in-automation Running Terraform in Automation guide}.
      class Connection < ::Kitchen::Transport::Exec::Connection
        # #execute executes a Terraform CLI command on the local host.
        #
        # @param command [String] the Terraform command to be executed locally.
        # @return [String] the standard output of the command.
        # @raise [Kitchen::Transport::TransportFailed] if the command does not exit successfully.
        def execute(command)
          super "#{client} #{command}"

          stdout
        end

        # #run_command executes a command in a subshell on the local running system.
        #
        # @param command [String] the command to be executed locally.
        # @param options [Hash] additional configuration of the command.
        # @return [String] the standard output of the command.
        # @raise [Kitchen::ShellOut::ShellCommandFailed] if the command fails.
        # @raise [Kitchen::StandardError] for all other unexpected exceptions.
        def run_command(command, options = {})
          self.stdout = super command, options.merge(
            cwd: root_module_directory,
            environment: environment.merge("LC_ALL" => nil, "TF_IN_AUTOMATION" => "true"),
            timeout: command_timeout,
          )
        end

        private

        attr_accessor :client, :command_timeout, :environment, :options, :root_module_directory, :stdout

        # #init_options initializes incoming options for use by the object.
        #
        # @param options [Hash] configuration options.
        # @return [void]
        # @api private
        def init_options(options)
          super

          self.client = options.delete :client
          self.command_timeout = options.delete :command_timeout
          self.environment = options.delete(:environment) || {}
          self.root_module_directory = options.delete :root_module_directory
        end
      end
    end
  end
end
