require 'yaml'

module Shell
  class Runner

    def error message
      UI.error message
      exit 1
    end

    def launch
      command = ARGV.empty? ? "sh" : ARGV.join(" ")

      file = "docker-compose.dev.yml"

      if !File.exist? file
        error "Could not find file '#{file}'."
      end

      manifest = YAML.load File.read file

      services = manifest["services"].to_a

      if services.length != 1
        error "Currently sct only supports a single service declaration in '#{file}'. Contact the infra guild if you consider this a limitation."
      end

      service, service_spec = services.first

      container = service_spec["container_name"]

      project = `docker container inspect --format '{{index .Config.Labels "com.docker.compose.project"}}' #{container}`.chomp

      if project == "spend-cloud"
        print "This container was not started with 'sct dev'. Are you sure you want to continue? [y/N] ".red

        answer = $stdin.readline.chomp.downcase

        if answer != "y"
          exit
        end
      end

      system "docker exec -it #{container} #{command}"
    end

  end
end