using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using LCU.Shared.Collections.RepoApiLib.Extensions;
using LCU.Shared.Collections.RepoApiLib.Models;
using LCU.Shared.Collections.RepoApiLib.Persistence;
using LCU.Shared.Collections.RepoApiLib.Repositories;
using LCU.Shared.Collections.RepoApiLib.WebServices.AutoIMS;
using Microsoft.EntityFrameworkCore;
using Serilog;
using AuctionAssignment = LCU.Shared.Collections.RepoApiLib.Models.AuctionAssignment;

namespace LCU.API.Collections.RepoApi.Services.AutoIms
{
    public class AuctionProcessorDao : IAuctionProcessorDao
    {
        private readonly IImsAutoFileDataRepository _imsAutoFileDataRepository;
        private readonly IAutoImsWebService _autoImsWebService;
        private readonly IUnitOfWork _unitOfWork;
        private readonly AppDbContext _context;
        private readonly string statusTypeRepo = "REPO";
        private readonly string statusTypeSold = "SOLD";
        private readonly string statusTypeRedeemed = "REDEEMED";

        public AuctionProcessorDao(
            IImsAutoFileDataRepository imsAutoFileDataRepository,
            IAutoImsWebService autoImsWebService,
            AppDbContext context,
            IUnitOfWork unitOfWork
        )
        {
            _context = context;
            _unitOfWork = unitOfWork;
            _imsAutoFileDataRepository = imsAutoFileDataRepository;
            _autoImsWebService = autoImsWebService;
        }

        public string UpdateAutoImsFromAuctionData(ImsAutoFileData item)
        {
            try
            {
                WebServiceResponse response = null;

                Task.Run(async () =>
                {
                    response = await _autoImsWebService.UpdateAuctionIdentifyingValuesAsync(
                        item.AuctionCustomerNo,
                        item.VIN,
                        item.AuctionAssignmentId.ToString());
                }).Wait();
                return "Updated AutoIMS with Landmark identifiers.";
            }
            catch (Exception ex)
            {
                Log.Error(ex, "UpdateAutoIMS From Auction Failure");
                return "Failure Updating AutoIMS with Landmark identifiers.";
            }
        }

        public static string GetFormattedVin(string vin)
        {
            return !string.IsNullOrWhiteSpace(vin)
                ? vin.Trim().PadLeft(17, '0').ToUpper()
                : null;
        }

        public RepoAccount FindByAuctionCustomerNoAndVinAsync(string auctionCustomerNo, string unformattedVin)
        {
            List<RepoAccount> repos = FindRepoByStatus(auctionCustomerNo, unformattedVin, statusTypeRepo);
               

            if (!repos.Any())
            {
                repos = FindRepoByStatus(auctionCustomerNo, unformattedVin, statusTypeSold);
            }

            if (!repos.Any())
            {
                repos = FindRepoByStatus(auctionCustomerNo, unformattedVin, statusTypeRedeemed);
            }

            /*
            Currently we cannot error on multiple rows returned because we can have duplicate repos in the database 
            We will need to perform extensive data cleanup before this can be enabled 
            */
            // if (repos.Count > 1)
            // {
            //     throw new Exception($"Multiple Auction Assignments Returned For: AuctionCustomerNo:{auctionCustomerNo} | VIN:{vin}");
            // }

            return repos.FirstOrDefault();
        }

        public ImsAutoFileData UpdateExistingFile(ImsAutoFileData existingAuctionFile, ImsAutoFileData imsAutoFileData)
        {
            _context.Entry(existingAuctionFile).CurrentValues.SetValues(imsAutoFileData);
            imsAutoFileData.DateReceivedFromAutoIMS = existingAuctionFile.DateReceivedFromAutoIMS;
            imsAutoFileData.CollateralImagePath =
                _autoImsWebService.GetCollateralImage(imsAutoFileData.ConditionReportLink);
            _imsAutoFileDataRepository.Update(existingAuctionFile);
            _unitOfWork.CompleteAsync().GetAwaiter().GetResult();
            return imsAutoFileData;
        }

        public ImsAutoFileData CreateImsAuctionFileData(ImsAutoFileData imsAutoFileData)
        {
            imsAutoFileData.DateReceivedFromAutoIMS = DateTime.Now;
            imsAutoFileData.CollateralImagePath =
                _autoImsWebService.GetCollateralImage(imsAutoFileData.ConditionReportLink);
            Add(imsAutoFileData);
            _unitOfWork.CompleteAsync().GetAwaiter().GetResult();

            return imsAutoFileData;
        }

        public void Add(ImsAutoFileData assignment)
        {
            _context.ImsAutoFileData.Add(assignment);
        }

        public ImsAutoFileData FindByAuctionAssignmentIdAsync(int auctionAssignmentId)
        {
            return _context.ImsAutoFileData.AsNoTracking()
                .FirstOrDefault(x => x.AuctionAssignmentId == auctionAssignmentId);
        }

        public ImsAutoFileData GetNonConformingImsFileRecord(string vin, string auctionCustomerNo)
        {
            ImsAutoFileData imsAutoFile = null;

            // Allow for vehicle brought back to auction after sale. it happens!
            DateTime withinThirtyDays = DateTime.Now.AddDays(-30);
            imsAutoFile = _context.ImsAutoFileData.AsNoTracking().FirstOrDefault(x =>
                (x.VIN.Trim() == vin && x.AuctionCustomerNo == auctionCustomerNo
                                     && (x.SoldDate == null || x.SoldDate >= withinThirtyDays)));

            return imsAutoFile;
        }


        public ImsAutoFileData FindImsAuctionFileData(int auctionAssignmentId, string customerNo, string VIN)
        {
            var existingAuctionFile = FindByAuctionAssignmentIdAsync(auctionAssignmentId) ?? GetNonConformingImsFileRecord(VIN, customerNo);
            return existingAuctionFile;
        }

        public AuctionAssignment FindByIdAsync(int id)
        {
            return _context.AuctionAssignments.Where(c => c.ID == id).IncludeAll().FirstOrDefault();
        }

        public AuctionAssignment FindByAuctionCustomerNoAndVin(string auctionCustomerNo, string vin)
        {
            List<AuctionAssignment> auctionAssignments = FindAuctionByStatus(auctionCustomerNo, vin, statusTypeRepo);

            if(!auctionAssignments.Any())
            {
                auctionAssignments = FindAuctionByStatus(auctionCustomerNo, vin, statusTypeSold);
            }

            if (!auctionAssignments.Any())
            {
                auctionAssignments = FindAuctionByStatus(auctionCustomerNo, vin, statusTypeRedeemed);
            }

            return auctionAssignments.FirstOrDefault();
        }

        public AuctionAssignment FindAuctionAssignment(ImsAutoFileData item)
        {
            var auctionAssignment
                = /* FindByIdAsync(item.AuctionAssignmentId) this can't be used because old numbers will exist at first. ??*/
                FindByAuctionCustomerNoAndVin(item.AuctionCustomerNo, item.VIN);

            if (auctionAssignment == null)
            {
                throw new Exception("Auction assignment not found for Individual/VIN " + item.AuctionCustomerNo);
            }

            return auctionAssignment;
        }

        public RepoAccount FindRepoForImsAuctionItem(ImsAutoFileData item)
        {
            RepoAccount repo = null;

            // GJF, this can't be used because old numbers will exist at first....
            //            if (item.AuctionAssignmentId > 0) {
            //                repo = await _repoAccountRepository.FindByAuctionAssignmentIdAsync(item.AuctionAssignmentId);
            //        }

            repo = FindByAuctionCustomerNoAndVinAsync(item.AuctionCustomerNo, item.VIN);

            if (repo == null)
            {
                throw new Exception("Repo Account not found for Individual/VIN " + item.AuctionCustomerNo);
            }

            return repo;
        }

        public IReadOnlyCollection<AuctionAssignment> ListReadyForFloorPrice()
        {
            var temp = (from x in _context.AuctionAssignments
                where (x.FloorPrice ?? 0) == 0 && x.AutoIMS != null && x.AutoIMS.SoldDate == null &&
                      (x.AutoIMS.StatedMileage ?? -1) > 1 && x.AutoIMS.ScheduledSaleDate != null &&
                      x.AutoIMS.ScheduledSaleDate > DateTime.Now.Date &&
                      x.RedeemedDate == null &&
                      ((x.AutoIMS.ApprovedVehicleGrade ?? 0) > 0 || (x.AutoIMS.VehicleGrade ?? 0) > 0)
                select x).OrderByDescending(x => x.ID);

            return temp.IncludeAll().ToList();
        }

        private List<RepoAccount> FindRepoByStatus(string auctionCustomerNo, string unformattedVin, string statusType)
        {
            return (from account in _context.RepoAccounts
                    join collateral in _context.Collaterals on account.RepoId equals collateral.RepoId
                    join auctionAssignment in _context.AuctionAssignments on account.RepoId equals auctionAssignment.RepoId
                    where GetFormattedVin(collateral.Vin) == GetFormattedVin(unformattedVin)
                          && (auctionAssignment.AuctionCustomerNo == auctionCustomerNo || string.IsNullOrWhiteSpace(auctionCustomerNo))
                          && account.Status == statusType
                    select account).ToList();
        }

        private List<AuctionAssignment> FindAuctionByStatus(string auctionCustomerNo, string vin, string statusType)
        {
            return (from auctionAssignment in _context.AuctionAssignments
                    join account in _context.RepoAccounts on auctionAssignment.RepoId equals account.RepoId
                    join collateral in _context.Collaterals on account.RepoId equals collateral.RepoId
                    where GetFormattedVin(collateral.Vin) == GetFormattedVin(vin)
                          && (auctionAssignment.AuctionCustomerNo == auctionCustomerNo || string.IsNullOrWhiteSpace(auctionCustomerNo))
                          && account.Status == statusType
                    select auctionAssignment).ToList();
        }
    }
}