using Landmark.OLA.Models.Addresses;
using System.Text;
using System.Web;
using System.Xml;
using USPS.Configuration;

namespace USPS.ApiCalls
{
    public class AddressValidationRequestBuilder : IRequestBuildable
    {
        private readonly UspsSettings _settings;
        private readonly Address _address;

        public AddressValidationRequestBuilder(UspsSettings settings, Address address)
        {
            _settings = settings;
            _address = address;
        }

        public virtual string BuildAddressXML()
        {
            var sb = new StringBuilder();
            var sw = new StringWriter(sb);
            var xml = new XmlTextWriter(sw);

            xml.WriteStartElement("AddressValidateRequest");
            xml.WriteAttributeString("USERID", _settings.Username);
            xml.WriteStartElement("Address");
            // USPS considers unit numbers (ex: APT 204) to be Address1. Our app's models would consider these to be Address2. DO NOT CHANGE
            xml.WriteElementString("Address1", _address.Address2);
            xml.WriteElementString("Address2", _address.Address1);
            xml.WriteElementString("City", _address.City);
            xml.WriteElementString("State", _address.State.ToString());
            xml.WriteElementString("Zip5", _address.PostalCode);
            xml.WriteElementString("Zip4", "");
            xml.WriteEndElement();
            xml.WriteEndElement();
            xml.Close();

            var query = HttpUtility.ParseQueryString(string.Empty);
            query["API"] = "Verify";
            query["XML"] = sb.ToString();

            return query.ToString();
        }

        public string BuildGET()
        {
            var xml = BuildAddressXML();

            var message = _settings.EndpointUrl + xml;

            return message;
        }
    }
}