using System;
using System.IO;
using System.Linq;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
using System.Xml.Serialization;
using Serilog;

namespace LCU.Shared.Collections.RepoApiLib.WebServices.AutoIMS
{
    public class AutoImsWebService : IAutoImsWebService
    {
        private string URL = "https://wstls.autoims.com/ClientWebservice?clientId={0}";
        private readonly AutoImsServiceConfig _config;

        public AutoImsWebService(AutoImsServiceConfig config)
        {
            _config = config;
            URL = string.Format(URL, config.ClientId);
        }

        public static string GetFormattedVIN(string vin)
        {
            return vin.Trim().PadLeft(17, '0').ToUpper();
        }

        public async Task<WebServiceResponse> RemoveFromAuction(string vin, string clientStockNumber)
        {
            WebServiceResponse webServiceResponse = null;

            URL = string.Format(URL + "&vin={0}&clientStockNum={1}", vin, clientStockNumber);
            using (var client = new HttpClient())
            {
                using (var req = new HttpRequestMessage(HttpMethod.Delete, URL))
                {
                    string authInfo = String.Format("{0}:{1}", _config.Login, _config.Password);
                    authInfo = Convert.ToBase64String(Encoding.Default.GetBytes(authInfo));
                    req.Headers.Add("Authorization", "Basic " + authInfo);
                    req.Headers.Remove("Expect");
                    req.Headers.Add("Expect", "");

                    using (HttpResponseMessage resp = await client.SendAsync(req))
                    {
                        //resp.EnsureSuccessStatusCode();

                        var cont = await resp.Content.ReadAsStringAsync();
                        webServiceResponse = DeserializeResponse<WebServiceResponse>(cont);
                    }
                }
            }

            return webServiceResponse;
        }

        public async Task<WebServiceResponse> PostVehicleAsync<T>(T vehicle)
        {
            var xml = Serialize<T>(vehicle);
            WebServiceResponse WebServiceResponse = null;


            using (var client = new HttpClient())
            {
                using (var content = new StringContent(xml))
                {
                    content.Headers.Remove("Content-Type");
                    content.Headers.Add("Content-Type", "application/xml");

                    using (var req = new HttpRequestMessage(HttpMethod.Post, URL))
                    {
                        string authInfo = String.Format("{0}:{1}", _config.Login, _config.Password);
                        authInfo = Convert.ToBase64String(Encoding.Default.GetBytes(authInfo));
                        req.Headers.Add("Authorization", "Basic " + authInfo);
                        req.Headers.Remove("Expect");
                        req.Headers.Add("Expect", "");
                        req.Content = content;

                        using (HttpResponseMessage resp = await client.SendAsync(req))
                        {
                            var cont = await resp.Content.ReadAsStringAsync();
                            WebServiceResponse = DeserializeResponse<WebServiceResponse>(cont);

                            // 6 is duplicate.
                            if (WebServiceResponse.Status.Code == 6)
                            {
                                Log.Information($"Auto Ims Status Code: { WebServiceResponse.Status.Code}, {WebServiceResponse.Status.Description}");
                                WebServiceResponse.Status.Code = 1;
                                WebServiceResponse.Status.Description = "Notification Already Sent To AutoIMS";
                            }
                            else if (WebServiceResponse.Status.Code != 1)
                            {
                                throw new Exception("Auto Ims Status Code: " + WebServiceResponse.Status.Code + " " + string.Join(",",
                                                        WebServiceResponse.Status.ValidationError.Select(x =>
                                                            x.Message)));
                            }

                            //resp.EnsureSuccessStatusCode();
                            if (resp.StatusCode != System.Net.HttpStatusCode.OK)
                            {
                                throw new Exception("Status Code: " + resp.StatusCode + " " + string.Join(",",
                                                        WebServiceResponse.Status.ValidationError.Select(x =>
                                                            x.Message)));
                            }
                        }
                    }
                }
            }


            return WebServiceResponse;
        }

        public async Task<WebServiceResponse> UpdateAuctionIdentifyingValuesAsync(string customerNum,
            string vin,
            string auctionAssignmentId)
        {
            VehicleIdentiferUpdate veh = new VehicleIdentiferUpdate();
            veh.ClientAccountNumber = customerNum;
            veh.VIN = vin;
            veh.ClientField1 = auctionAssignmentId;

            var response = await PostVehicleAsync<VehicleIdentiferUpdate>(veh);
            response.AuctionCollateralVin = vin;
            return response;
        }

        public async Task<WebServiceResponse> AddAuctionNote(string vin, string customerNumber, string note,
            string writer)
        {
            WebServiceResponse response = null;
            VehicleNote vehicle = new VehicleNote();
            vehicle.VIN = vin;

            //do not include and AutoIMS will timestamp.
            //vehicle.Note.CreationDate = String.Empty;// DateTime.Now.ToString("yyyy-MM-dd");
            vehicle.Note.NoteText = note;
            vehicle.Note.Writer = writer;
            vehicle.Note.Private = false;

            response = await PostVehicleAsync<VehicleNote>(vehicle);
            response.AuctionCollateralVin = vin;
            return response;
        }

        public async Task<WebServiceResponse> RemoveAuction(string VIN, string customerNumber)
        {
            WebServiceResponse response = await RemoveFromAuction(VIN, customerNumber);
            response.AuctionCollateralVin = VIN;
            return response;
        }

        public async Task<WebServiceResponse> Redeem(string VIN)
        {
            WebServiceResponse response = null;
            RedeemVehicle vehicle = new RedeemVehicle();
            vehicle.VIN = VIN;
            vehicle.AuctionAssignment.RedeemVehicle = DateTime.Now.ToString("yyyy-MM-dd");

            response = await PostVehicleAsync<RedeemVehicle>(vehicle);
            response.AuctionCollateralVin = VIN;
            return response;
        }

        public async Task<WebServiceResponse> TitleSent(string VIN)
        {
            WebServiceResponse response = null;
            VehicleTitleSent vehicle = new VehicleTitleSent();
            vehicle.VIN = VIN;
            vehicle.AuctionAssignment.TitleSent = DateTime.Now.ToString("yyyy-MM-dd");

            response = await PostVehicleAsync<VehicleTitleSent>(vehicle);
            response.AuctionCollateralVin = VIN;
            return response;
        }

        public async Task<WebServiceResponse> PlaceHold(string VIN, int holdCode, DateTime holdUntil)
        {
            WebServiceResponse response = null;
            VehicleHold vehicle = new VehicleHold();
            vehicle.VIN = VIN;
            vehicle.AuctionAssignment.SaleHold.HoldUntil = holdUntil.ToString("yyyy-MM-dd");
            vehicle.AuctionAssignment.SaleHold.HoldStatus = holdCode;

            response = await PostVehicleAsync<VehicleHold>(vehicle);
            response.AuctionCollateralVin = VIN;
            return response;
        }

        public string GetCollateralImage(string conditionReporUrl)
        {
            string html = String.Empty;
            string imageLink = String.Empty;

            try
            {
                using (var client = new HttpClient())
                {
                    var response = client.GetAsync(conditionReporUrl).Result;

                    html = response.Content.ReadAsStringAsync().Result;

                    var aTag = html.Substring(html.IndexOf("pic_0", StringComparison.OrdinalIgnoreCase));

                    var imgTag = aTag.Substring(aTag.IndexOf("addpic(", StringComparison.OrdinalIgnoreCase) + 7);

                    //var src = imgTag.Substring(imgTag.IndexOf("src=\"", StringComparison.InvariantCultureIgnoreCase));

                    imageLink = imgTag.Substring(0, imgTag.IndexOf(",", StringComparison.OrdinalIgnoreCase))
                        .Replace("'", "").Replace("\"", "");
                }
            }
            catch (Exception)
            {
                imageLink = null;
            }

            return imageLink;
        }

        private static string Serialize<T>(T vehicle)
        {
            XmlSerializer xsSubmit = new XmlSerializer(typeof(T));

            string xml = "";

            using (var sww = new StringWriter())
            {
                using (XmlWriter writer = XmlWriter.Create(sww))
                {
                    xsSubmit.Serialize(writer, vehicle);
                    xml = sww.ToString();
                }
            }

            return xml;
        }

        private T DeserializeResponse<T>(string xml)
        {
            using (MemoryStream memoryStream = new MemoryStream(StringToByteArrayUtf8(xml)))
            {
                XmlSerializer xmlSerializer = new XmlSerializer(typeof(T));

                using (StreamReader xmlStreamReader = new StreamReader(memoryStream, Encoding.UTF8))
                {
                    return (T) xmlSerializer.Deserialize(xmlStreamReader);
                }
            }
        }

        private static byte[] StringToByteArrayUtf8(string value)
        {
            UTF8Encoding encoding = new UTF8Encoding();
            return encoding.GetBytes(value);
        }
    }
}