# frozen_string_literal: true

module CarrierWave
  module Storage
    class AliyunFile
      attr_writer :file
      attr_reader :uploader, :path

      alias filename path
      alias identifier filename

      def initialize(uploader, base, path)
        @uploader = uploader
        @path = path
        @base = base
      end

      def file
        @file ||= bucket.get(path).try(:first)
      end

      def size
        file.headers[:content_length].to_i
      rescue StandardError
        nil
      end

      def read
        object, body = bucket.get(path)
        @headers = object.headers
        body
      end

      def delete
        bucket.delete(path)
        true
      rescue StandardError => e
        # If the file's not there, don't panic
        puts "carrierwave-aliyun delete file failed: #{e}"
        nil
      end

      ##
      # Generate file url
      # params
      #    :thumb - Aliyun OSS Image Processor option, etc: @100w_200h_95q
      #
      def url(opts = {})
        if bucket.mode == :private
          bucket.private_get_url(path, **opts)
        else
          bucket.path_to_url(path, **opts)
        end
      end

      def content_type
        headers[:content_type]
      end

      def content_type=(new_content_type)
        headers[:content_type] = new_content_type
      end

      def store(new_file, headers = {})
        if new_file.is_a?(self.class)
          new_file.copy_to(path)
        else
          fog_file = new_file.to_file
          bucket.put(path, fog_file, **headers)
          fog_file.close if fog_file && !fog_file.closed?
        end
        true
      end

      def headers
        @headers ||= begin
          obj = bucket.head(path)
          obj.headers
        end
      end

      def exists?
        !!headers
      end

      def copy_to(new_path)
        bucket.copy_object(path, new_path)
        self.class.new(uploader, @base, new_path)
      end

      def extension
        path_elements = path.split(".")
        path_elements.last if path_elements.size > 1
      end

      def original_filename
        return @original_filename if @original_filename

        if @file&.respond_to?(:original_filename)
          @file.original_filename
        elsif path
          ::File.basename(path)
        end
      end

      private

      def bucket
        @bucket ||= CarrierWave::Aliyun::Bucket.new(uploader)
      end
    end
  end
end