require 'net/https'
require 'uri'

module Correios
  module CEP
    class WebService
      URL = 'https://apps.correios.com.br/SigepMasterJPA/AtendeClienteService/AtendeCliente'

      def initialize
        @uri = URI.parse(URL)
        @proxy_uri = URI.parse(Correios::CEP.proxy_url)
      end

      def request(zipcode)
        http = build_http

        request = build_request(zipcode)
        Correios::CEP.log_request(request, uri.to_s)

        response = http.request(request)
        Correios::CEP.log_response(response)

        http.finish if http.started?

        response.body
      end

      private

      attr_reader :uri, :proxy_uri

      def build_http
        Net::HTTP.start(
          uri.host,
          uri.port,
          proxy_uri.host,
          proxy_uri.port,
          nil,
          nil,
          use_ssl: true,
          verify_mode: OpenSSL::SSL::VERIFY_NONE,
          open_timeout: Correios::CEP.request_timeout,
          read_timeout: Correios::CEP.request_timeout
        )
      end

      def build_request(zipcode)
        request = Net::HTTP::Post.new(uri.path)
        request['Content-Type'] = 'text/xml; charset=utf-8'
        request.body = request_body(zipcode)
        request
      end

      def request_body(zipcode)
        "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" +
        "<soapenv:Envelope xmlns:soapenv=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:cli=\"http://cliente.bean.master.sigep.bsb.correios.com.br/\">" +
           "<soapenv:Header />" +
           "<soapenv:Body>" +
              "<cli:consultaCEP>" +
                "<cep>#{zipcode}</cep>" +
              "</cli:consultaCEP>" +
           "</soapenv:Body>" +
        "</soapenv:Envelope>"
      end
    end
  end
end