using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Threading.Tasks;
using LCU.Shared.Collections.RepoApiLib.Extensions;
using LCU.Shared.Collections.RepoApiLib.Models;
using LCU.Shared.Collections.RepoApiLib.Models.Reporting;
using LCU.Shared.Collections.RepoApiLib.Persistence;
using Microsoft.EntityFrameworkCore;

namespace LCU.Shared.Collections.RepoApiLib.Repositories
{
    public class ReportingRepository : BaseRepository, IReportingRepository
    {
        public ReportingRepository(AppDbContext context) : base(context)
        {
        }

        // Maybe return a condensed object specifically meant for the frontend?
        public async Task<IReadOnlyCollection<RepoAccount>> GetAllAccountsInO4R()
        {
            return await _context.RepoAccounts.Where(repoAccount => repoAccount.Status == "O4R")
                .IncludeAll()
                .ToListAsync();
        }

        public async Task<IReadOnlyCollection<LandmarkReportAccountEntry>> GetActiveAccounts()
        {
            return await _context.ActiveAccountEntries.FromSql(
                @"select repos.repoId as RepoId, repos.DaysDelinquent as DaysDelinquent, repos.LastPaymentDate as LastPaymentDate, repos.LstPmtAmt as LastPaymentAmount, 
                         Repos.Balance as Balance, Repos.AccountTypeCode as AccountTypeCode, Repos.Bankruptcy as Bankruptcy, Repos.DateClosed as DateClosed,
						 Repos.DelinquentAmount as DelinquentAmount, Repos.Collector as Collector, Borrowers.IndividualName, repos.AccountNo as AccountNo, 
                         Collaterals.Year as Year, Collaterals.Make as Make, Collaterals.Model as Model, RepoCompany.Name as RepoCompany,
                         RepoCompanySelections.DateRepoed as DateRepoed, RepoCompanySelections.RepoType, 
						 RepoCompanySelections.RepoCompanyAssignmentDate as DateAssigned,
                         Repos.Status as Status, DATEDIFF(day, RepoStatusChanges.ChangedDate, CURRENT_TIMESTAMP) as DaysInStatus, IMSAutoFileData.SoldDate as SoldDate, 
                         IMSAutoFileData.DateEnteredAutoIMS as DateEnteredAutoIMS, IMSAutoFileData.FloorPriceAccepted as FloorPrice, IMSAutoFileData.VehicleGrade as Grade,
                         IMSAutoFileData.ScheduledSaleDate as ScheduledSaleDate, IMSAutoFileData.TotalCharges as TotalCharges,
						 IMSAutoFileData.GrossPercentFloor as GrossPercentFloor, IMSAutoFileData.NetPercentFloor as NetPercentFloor,
						 IMSAutoFileData.SalePrice as GrossSalePrice,
						 Auctions.Name as AuctionHouse, AuctionAssignments.DateSubmitted as AuctionDate
                         From repos
                         left join RepoStatusChanges on RepoStatusChanges.RepoId = Repos.RepoId 
                              and RepoStatusChanges.ChangedDate = (select max(ChangedDate) from RepoStatusChanges where RepoId = repos.RepoId)
                         join Borrowers on Borrowers.RepoId = Repos.RepoId and Borrowers.OwnershipType = 6
                         join Collaterals on Collaterals.RepoId = Repos.RepoId
						 join RepoCompanySelections on Collaterals.CollateralId = RepoCompanySelections.CollateralId and RepoCompanySelections.DateTimeCreated = (select max(DateTimeCreated) from RepoCompanySelections where CollateralId = Collaterals.CollateralId)
                         left join RepoCompany on RepoCompanySelections.RepoCompanyId = RepoCompany.ID
                         left join AuctionAssignmentsToCollaterals on Collaterals.CollateralId = AuctionAssignmentsToCollaterals.CollateralId
                         left join AuctionAssignments on AuctionAssignmentsToCollaterals.AuctionAssignmentId = AuctionAssignments.ID
                         left join IMSAutoFileData on Repos.RepoId = IMSAutoFileData.RepoId
						 left join Auctions on Auctions.AuctionID = AuctionAssignments.AuctionId
                         where repos.status != 'REDEEMED' and repos.dateclosed is null
                         order by DateAssigned desc;
   	                ").ToListAsync();
        }


        public async Task<IReadOnlyCollection<LandmarkReportAccountEntry>> GetClosedAccounts(DateTime lowDateTime, DateTime highDateTime)
        {
            var lowDate = new SqlParameter("lowDate", lowDateTime);
            var highDate = new SqlParameter("highDate", highDateTime);
            return await _context.ActiveAccountEntries.FromSql(
                @"select repos.repoId as RepoId, repos.DaysDelinquent as DaysDelinquent, repos.LastPaymentDate as LastPaymentDate, repos.LstPmtAmt as LastPaymentAmount, 
                         Repos.Balance as Balance, Repos.AccountTypeCode as AccountTypeCode, Repos.Bankruptcy as Bankruptcy, Repos.DateClosed as DateClosed,
						 Repos.DelinquentAmount as DelinquentAmount, Repos.Collector as Collector, Borrowers.IndividualName, repos.AccountNo as AccountNo, 
                         Collaterals.Year as Year, Collaterals.Make as Make, Collaterals.Model as Model, RepoCompany.Name as RepoCompany,
                         RepoCompanySelections.DateRepoed as DateRepoed, RepoCompanySelections.RepoType, 
						 RepoCompanySelections.RepoCompanyAssignmentDate as DateAssigned, 
                         Repos.Status as Status, DATEDIFF(day, RepoStatusChanges.ChangedDate, CURRENT_TIMESTAMP) as DaysInStatus, IMSAutoFileData.SoldDate as SoldDate, 
                         IMSAutoFileData.DateEnteredAutoIMS as DateEnteredAutoIMS, IMSAutoFileData.FloorPriceAccepted as FloorPrice, IMSAutoFileData.VehicleGrade as Grade,
                         IMSAutoFileData.ScheduledSaleDate as ScheduledSaleDate, IMSAutoFileData.TotalCharges as TotalCharges,
						 IMSAutoFileData.GrossPercentFloor as GrossPercentFloor, IMSAutoFileData.NetPercentFloor as NetPercentFloor,
						 IMSAutoFileData.SalePrice as GrossSalePrice,
						 Auctions.Name as AuctionHouse, AuctionAssignments.DateSubmitted as AuctionDate
                         From repos
                         left join RepoStatusChanges on RepoStatusChanges.RepoId = Repos.RepoId 
                              and RepoStatusChanges.ChangedDate = (select max(ChangedDate) from RepoStatusChanges where RepoId = repos.RepoId)
                         join Borrowers on Borrowers.RepoId = Repos.RepoId and Borrowers.OwnershipType = 6
                         join Collaterals on Collaterals.RepoId = Repos.RepoId
						 join RepoCompanySelections on Collaterals.CollateralId = RepoCompanySelections.CollateralId and RepoCompanySelections.DateTimeCreated = (select max(DateTimeCreated) from RepoCompanySelections where CollateralId = Collaterals.CollateralId)
                         left join RepoCompany on RepoCompanySelections.RepoCompanyId = RepoCompany.ID
                         left join AuctionAssignmentsToCollaterals on Collaterals.CollateralId = AuctionAssignmentsToCollaterals.CollateralId
                         left join AuctionAssignments on AuctionAssignmentsToCollaterals.AuctionAssignmentId = AuctionAssignments.ID
                         left join IMSAutoFileData on Repos.RepoId = IMSAutoFileData.RepoId
						 left join Auctions on Auctions.AuctionID = AuctionAssignments.AuctionId
                         where repos.status in ('PSKP', 'REDEEMED') or (repos.DateClosed is not null and repos.DateClosed >= @lowDate and repos.DateClosed <= @highDate)
                         order by DateAssigned desc;
   	                ", lowDate, highDate).ToListAsync();
        }

        public async Task<IReadOnlyCollection<StdReportEntry>> GetAccountsByDateSoldInAutoIMS(DateTime lowDateTime, DateTime highDateTime)
        {
            return await GetAccountsWithinDateRange(lowDateTime, highDateTime, "SoldDate");
        }

        public async Task<IReadOnlyCollection<StdReportEntry>> GetAccountsByDateRepoed(DateTime lowDateTime, DateTime highDateTime)
        {
            return await GetAccountsWithinDateRange(lowDateTime, highDateTime, "DateRepoed");
        }

        public async Task<IReadOnlyCollection<StdReportEntry>> GetAccountsByDateAssigned(DateTime lowDateTime, DateTime highDateTime)
        {
            return await GetAccountsWithinDateRange(lowDateTime, highDateTime, "RepoCompanyAssignmentDate");
        }

        public async Task<IReadOnlyCollection<StdReportEntry>> GetAccountsByStatusChangeInPeriod(string status, DateTime lowDateTime, DateTime highDateTime)
        {
            return await GetAccountsWithLatestStatusChangeInPeriod(lowDateTime, highDateTime, status);
        }

        public async Task<IReadOnlyCollection<StdReportEntry>> GetAccountsByO4RDate(DateTime lowDateTime, DateTime highDateTime)
        {
            return await GetAccountsWithinDateRange(lowDateTime, highDateTime, "O4RDate");
        }

        private async Task<IReadOnlyCollection<StdReportEntry>> GetAccountsWithinDateRange(DateTime lowDateTime, DateTime highDateTime, string dateFieldToFilter)
        {
            var lowDate = new SqlParameter("lowDate", lowDateTime);
            var highDate = new SqlParameter("highDate", highDateTime);
            return await _context.StandardReportEntries.FromSql(
                $@"
                    select
                    repos.repoId as RepoId,
	                repos.Balance as Balance,
	                repos.AccountNo as AccountNo,
	                repos.AccountTypeCode as AccountTypeCode,
	                repos.Bankruptcy as Bankruptcy,
	                repos.Collector as Collector,
                    repos.O4RDate as O4RDate,
	                DATEDIFF(day, Repos.DueToPayDate, CURRENT_TIMESTAMP) as DaysCurrentDelq,
	                Repos.DaysDelinquent as DaysDelqWhenAdded,
	                Repos.Status as Status,
	                (select max(ChangedDate) from RepoStatusChanges where RepoId = repos.RepoId) as MostRecentStatusChangeDate,
	                DATEDIFF(day, RepoStatusChanges.ChangedDate, CURRENT_TIMESTAMP) as DaysInStatus,
	                RepoStatusChanges.ChangedDate as StatusChangeDate,
	                Repos.LstPmtAmt as LastPaymentAmount,
	                Repos.LastPaymentDate as LastPaymentDate,
	                Repos.DelinquentAmount as DelinquentAmount,
	                Collaterals.CollateralId as CollateralId,
	                RepoCompanySelections.RepoCompanyId as RepoCompanyId,
	                Collaterals.Year as Year,
	                Collaterals.Make as Make,
	                Collaterals.Model as Model,
	                RepoCompany.Name as RepoCompany,
	                RepoCompanySelections.DateRepoed as DateRepoed,
	                RepoCompanySelections.RepoCompanyAssignmentDate as RepoCompanyAssignmentDate,
	                RepoCompanySelections.RepoType as RepoType,
	                DATEDIFF(day, RepoCompanySelections.RepoCompanyAssignmentDate, RepoCompanySelections.DateRepoed) as RepoDuration,
	                AuctionAssignments.AuctionId as AuctionId,
	                Auctions.Name as AuctionName,
	                IMSAutoFileData.Status as AutoImsStatus,
	                IMSAutoFileData.SoldDate as SoldDate, 
	                IMSAutoFileData.DateEnteredAutoIMS as DateEnteredAutoIMS,
	                IMSAutoFileData.ScheduledSaleDate as ScheduledSaleDate,
	                IMSAutoFileData.VehicleGrade as Grade, IMSAutoFileData.FloorPriceAccepted as FloorPrice,
	                IMSAutoFileData.SalePrice as GrossSalePrice,
	                IMSAutoFileData.GrossPercentFloor as GrossPercentFloor,
	                IMSAutoFileData.NetPercentFloor as NetPercentFloor,
	                IMSAutoFileData.TotalCharges as TotalCharges,
	                Borrowers.IndividualName as IndividualName,
                    null as FilteredStatus,
                    null as FilteredStatusChangeDate
                    From repos
                    left join RepoStatusChanges on RepoStatusChanges.RepoId = Repos.RepoId 
                        and RepoStatusChanges.ChangedDate = (select max(ChangedDate) from RepoStatusChanges where RepoId = repos.RepoId)
                    left join Collaterals on Collaterals.RepoId = Repos.RepoId
                    left join RepoCompanySelections on Collaterals.CollateralId = RepoCompanySelections.CollateralId
                    left join RepoCompany on RepoCompanySelections.RepoCompanyId = RepoCompany.ID
                    left join AuctionAssignmentsToCollaterals on Collaterals.CollateralId = AuctionAssignmentsToCollaterals.CollateralId
                    left join AuctionAssignments on AuctionAssignmentsToCollaterals.AuctionAssignmentId = AuctionAssignments.ID
                    left join Auctions on Auctions.AuctionID = AuctionAssignments.AuctionId
                    left join IMSAutoFileData on Repos.RepoId = IMSAutoFileData.RepoId
                    left join Borrowers on Repos.RepoId = Borrowers.RepoId  and Borrowers.OwnershipType = 6
                    where RepoCompanySelections.DateTimeCreated = (
	                    select max(RepoCompanySelections.DateTimeCreated)
	                    from RepoCompanySelections
	                    where RepoCompanySelections.CollateralId = Collaterals.CollateralId
                    ) and {dateFieldToFilter} >= @lowDate and {dateFieldToFilter} <= @highDate
   	            ", lowDate, highDate).Distinct().ToListAsync();
        }

        private async Task<IReadOnlyCollection<StdReportEntry>> GetAccountsWithLatestStatusChangeInPeriod(DateTime lowDateTime, DateTime highDateTime, string status)
        {
            var lowDate = new SqlParameter("lowDate", lowDateTime);
            var highDate = new SqlParameter("highDate", highDateTime);
            var repoStatus = new SqlParameter("repoStatus", status);
            return await _context.StandardReportEntries.FromSql(
                $@"
                    select
                    repos.repoId as RepoId,
	                repos.Balance as Balance,
	                repos.AccountNo as AccountNo,
	                repos.AccountTypeCode as AccountTypeCode,
	                repos.Bankruptcy as Bankruptcy,
	                repos.Collector as Collector,
                    repos.O4RDate as O4RDate,
	                DATEDIFF(day, Repos.DueToPayDate, CURRENT_TIMESTAMP) as DaysCurrentDelq,
	                Repos.DaysDelinquent as DaysDelqWhenAdded,
	                Repos.Status as Status,
	                (select max(ChangedDate) from RepoStatusChanges where RepoId = repos.RepoId) as MostRecentStatusChangeDate,
	                DATEDIFF(day, RepoStatusChanges.ChangedDate, CURRENT_TIMESTAMP) as DaysInStatus,
	                RepoStatusChanges.ChangedDate as StatusChangeDate,
	                Repos.LstPmtAmt as LastPaymentAmount,
	                Repos.LastPaymentDate as LastPaymentDate,
	                Repos.DelinquentAmount as DelinquentAmount,
	                Collaterals.CollateralId as CollateralId,
	                RepoCompanySelections.RepoCompanyId as RepoCompanyId,
	                Collaterals.Year as Year,
	                Collaterals.Make as Make,
	                Collaterals.Model as Model,
	                RepoCompany.Name as RepoCompany,
	                RepoCompanySelections.DateRepoed as DateRepoed,
	                RepoCompanySelections.RepoCompanyAssignmentDate as RepoCompanyAssignmentDate,
	                RepoCompanySelections.RepoType as RepoType,
	                DATEDIFF(day, RepoCompanySelections.RepoCompanyAssignmentDate, RepoCompanySelections.DateRepoed) as RepoDuration,
	                AuctionAssignments.AuctionId as AuctionId,
	                Auctions.Name as AuctionName,
	                IMSAutoFileData.Status as AutoImsStatus,
	                IMSAutoFileData.SoldDate as SoldDate, 
	                IMSAutoFileData.DateEnteredAutoIMS as DateEnteredAutoIMS,
	                IMSAutoFileData.ScheduledSaleDate as ScheduledSaleDate,
	                IMSAutoFileData.VehicleGrade as Grade, IMSAutoFileData.FloorPriceAccepted as FloorPrice,
	                IMSAutoFileData.SalePrice as GrossSalePrice,
	                IMSAutoFileData.GrossPercentFloor as GrossPercentFloor,
	                IMSAutoFileData.NetPercentFloor as NetPercentFloor,
	                IMSAutoFileData.TotalCharges as TotalCharges,
	                Borrowers.IndividualName as IndividualName,
                    DesiredStatusChange.StatusTo as FilteredStatus,
                    DesiredStatusChange.ChangedDate as FilteredStatusChangeDate
                    From repos
                    left join RepoStatusChanges on RepoStatusChanges.RepoId = Repos.RepoId 
                        and RepoStatusChanges.ChangedDate = (select max(ChangedDate) from RepoStatusChanges where RepoId = repos.RepoId)
                    left join Collaterals on Collaterals.RepoId = Repos.RepoId
                    left join RepoCompanySelections on Collaterals.CollateralId = RepoCompanySelections.CollateralId
                    left join RepoCompany on RepoCompanySelections.RepoCompanyId = RepoCompany.ID
                    left join AuctionAssignmentsToCollaterals on Collaterals.CollateralId = AuctionAssignmentsToCollaterals.CollateralId
                    left join AuctionAssignments on AuctionAssignmentsToCollaterals.AuctionAssignmentId = AuctionAssignments.ID
                    left join Auctions on Auctions.AuctionID = AuctionAssignments.AuctionId
                    left join IMSAutoFileData on Repos.RepoId = IMSAutoFileData.RepoId
                    left join Borrowers on Repos.RepoId = Borrowers.RepoId  and Borrowers.OwnershipType = 6
                    inner join RepoStatusChanges DesiredStatusChange on DesiredStatusChange.RepoId = Repos.RepoId
                        and DesiredStatusChange.StatusTo = @repoStatus
		                and DesiredStatusChange.ChangedDate >= @lowDate
		                and DesiredStatusChange.ChangedDate <= @highDate
                    where RepoCompanySelections.DateTimeCreated = (
	                    select max(RepoCompanySelections.DateTimeCreated)
	                    from RepoCompanySelections
	                    where RepoCompanySelections.CollateralId = Collaterals.CollateralId
                    )
   	            ", lowDate, highDate, repoStatus).Distinct().ToListAsync();
        }
    }
}