# 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_dependencies(entrypoint_name, _target)
          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 = SewingKit::Webpack::Manifest::Base.load_metadata_from_node

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

        def load_metadata_from_fs(path)
          begin
            json_str = File.read(path)
          rescue => e
            raise ManifestLoadError.new(path, e)
          end

          begin
            JSON.parse(json_str)
          rescue => e
            raise ManifestParseError, e
          end
        end

        protected

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

        def mode
          'development'
        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