using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using TLSharp.Core.MTProto;

namespace TLSharp.Core.Requests
{
    public class GetContactRequest : MTProtoRequest
    {
        private List<int> currentContacts { get; set; }

        public List<Contact> contacts;
        public List<UserContactConstructor> users;

        public GetContactRequest(List<int> currentContactsID = null)
        {
            currentContacts = currentContactsID;
        }

        public override void OnSend(BinaryWriter writer)
        {
            writer.Write(0x22c6aa08);
            if (currentContacts == null)
                Serializers.String.write(writer, "");
            else
            {
                string hash = "";
                foreach (var currentUserID in currentContacts)
                {
                    var md5 = Utils.Helpers.md5(currentUserID.ToString());
                    hash += md5 + ",";
                }
                hash = hash.Length > 0 ? hash.Remove(hash.LastIndexOf(','), 1) : Utils.Helpers.md5( hash);
                Serializers.String.write(writer, hash);
            }
        }

        public override void OnResponse(BinaryReader reader)
        {
            var code = reader.ReadUInt32();
            var result = reader.ReadInt32(); // vector code
            int contact_len = reader.ReadInt32();
            this.contacts = new List<Contact>(contact_len);
            for (int imported_index = 0; imported_index < contact_len; imported_index++)
            {
                Contact imported_element;
                imported_element = TL.Parse<Contact>(reader);
                this.contacts.Add(imported_element);
            }
            reader.ReadInt32(); // vector code
            int users_len = reader.ReadInt32();
            this.users = new List<UserContactConstructor>(users_len);
            for (int users_index = 0; users_index < users_len; users_index++)
            {
                UserContactConstructor users_element;
                users_element = TL.Parse<UserContactConstructor>(reader);
                this.users.Add(users_element);
            }
        }

        public override void OnException(Exception exception)
        {
            throw new NotImplementedException();
        }
        public override bool Confirmed { get { return true; } }
        private readonly bool responded;
        public override bool Responded { get { return responded; } }
    }
}