# frozen_string_literal: true
require 'sewing_kit/webpack/manifest/base'

module SewingKit
  module Webpack
    class Manifest
      class Development < Base
        def initialize
          super
          @metadata_path = nil
        end

        def asset_bundle_name(_user_agent)
          'dev'
        end

        def asset_dependencies(entrypoint_name, _user_agent)
          current_metadata = metadata
          if current_metadata.key?('development')
            current_metadata['development']['hangTight']
          else
            current_metadata['entrypoints'][entrypoint_name]
          end
        end

        def clear_cache!
          super
          @metadata_path = nil
        end

        def manifest
          raise OnlyUseInProductionError
        end

        def metadata
          load_metadata
        end

        def load_metadata
          begin
            if @metadata_path
              result = load_metadata_from_fs(@metadata_path)
              return normalize_metadata(result)
            end
          rescue => e
            Rails.logger.warn(
              "[sewing_kit] could not read manifest from #{@metadata_path}; falling back to node.  #{e}"
            )
            @metadata_path = nil
          end

          result = load_metadata_from_node

          metadata = normalize_metadata(result)
          @metadata_path = metadata && metadata['path']
          metadata
        end

        private

        def normalize_metadata(maybe_array_metadata)
          if maybe_array_metadata.is_a?(Array)
            maybe_array_metadata.last
          else
            maybe_array_metadata
          end
        end

        def load_metadata_from_node
          begin
            stdout, stderr, status = Open3.capture3(
              'node_modules/.bin/sewing-kit', 'manifest', "--mode=development"
            )
          rescue => e
            raise NodeSewingKitNotRunnable.new('development', e)
          end

          raise NodeSewingKitManifestMissing, stderr unless status.success?

          parse_metadata(stdout)
        end
      end

      class OnlyUseInProductionError < StandardError
        def initialize
          super("The SewingKit::Webpack::Manifest#manifest is intended "\
          "for deploying assets to a CDN. Do not use it in development.")
        end
      end
    end
  end
end