# frozen_string_literal: true

module RSpec
  module Terraform
    module Logging
      class << self
        def resolve_streams(opts = {})
          streams = opts[:streams] || []
          devices = devices(opts)

          {
            logger: resolve_logger(opts[:logger], streams, devices),
            stdout: resolve_stdout(opts[:stdout], streams, devices),
            stderr: resolve_stderr(opts[:stderr], streams, devices)
          }
        end

        private

        def resolve_logger(logger, streams, devices)
          return logger if logger

          log_devices = []
          log_devices << devices[:file] if streams.include?(:file)
          log_devices << devices[:stdout] if streams.include?(:standard)

          multi_io(log_devices)
        end

        def resolve_stdout(stdout, streams, devices)
          return stdout if stdout

          log_devices = []
          log_devices << devices[:file] if streams.include?(:file)
          log_devices << devices[:stdout] if streams.include?(:standard)

          multi_io(log_devices)
        end

        def resolve_stderr(stderr, streams, devices)
          return stderr if stderr

          log_devices = []
          log_devices << devices[:file] if streams.include?(:file)
          log_devices << devices[:stderr] if streams.include?(:standard)

          multi_io(log_devices)
        end

        def devices(opts)
          {
            file: log_device(opts[:file_path] || File::NULL),
            stdout: log_device($stdout),
            stderr: log_device($stderr)
          }
        end

        def log_device(io)
          Logger::LogDevice.new(io)
        end

        def multi_io(ios)
          RubyTerraform::MultiIO.new(*ios)
        end
      end
    end
  end
end