# frozen_string_literal: true

module Wayfarer
  # @!attribute [r] url
  #   @return [String] the URL that was fetched
  # @!attribute [r] status_code
  #   @return [Fixnum] HTTP status code
  # @!attribute [r] body
  #   @return [String] the body of the response
  # @!attribute [r] headers
  #   @return [Hash] the headers of the response
  #   @note HTTP header keys are downcased, for example: `content-type`.
  class Page
    attr_reader :url,
                :status_code,
                :body,
                :headers

    # @!visibility private
    def initialize(url:, status_code:, body:, headers:)
      @url = url
      @status_code = status_code
      @body = body
      @headers = headers.transform_keys(&:downcase)
    end

    # Returns the MIME type of the response.
    # @return [MIME::Type]
    # @see https://www.rubydoc.info/gems/mime-types/MIME/Type
    def mime_type
      @mime_type ||= MIME::Types[content_type]&.first
    end

    # Returns a parsed representation of the HTTP response or the browser DOM,
    # depending on the Content-Type.
    # @return [Nokogiri::HTML::Document] when Content-Type is `text/html`
    # @see https://www.rubydoc.info/github/sparklemotion/nokogiri/Nokogiri/HTML/Document Nokogiri::HTML::Document
    # @return [Nokogiri::XML::Document] when Content-Type is `text/xml`
    # @see https://www.rubydoc.info/github/sparklemotion/nokogiri/Nokogiri/XML/Document Nokogiri::XML::Document
    # @return [Hash] when Content-Type is `application/json`
    # @note You can register custom parsers with {Wayfarer::Parsing.registry}.
    def doc
      @doc ||= Wayfarer::Parsing.parse(body, mime_type&.content_type || content_type)
    end

    # Returns a `MetaInspector::Document`.
    # @return [MetaInspector::Document]
    # @see https://www.rubydoc.info/gems/metainspector/MetaInspector/Document
    def meta
      @meta ||= MetaInspector.new(url, document: body, headers: headers, normalize_url: false)
    end

  private

    def content_type
      @content_type ||= headers["content-type"]
    end
  end
end