using Microsoft.EntityFrameworkCore;
using SushiBarContracts.BindingModels;
using SushiBarContracts.SearchModels;
using SushiBarContracts.ViewModels;
using SushiBarDatabaseImplement.Models;

namespace SushiBarDatabaseImplement.Storages
{
    public class ChequeStorage
    {
        public List<ChequeViewModel> GetFullList()
        {
            using var Context = new SushiBarDatabase();

            return Context.Cheques
                .Include(x => x.Customer)
                .Include(x => x.Promotion)
                .Include(x => x.ChequeItems)
                .Select(x => x.ViewModel)
                .ToList();
        }

        public List<ChequeViewModel> GetFilteredList(ChequeSearchModel Model)
        {
            using var Context = new SushiBarDatabase();

            if (Model.CustomerId.HasValue)
            {
                return Context.Cheques
                    .Include(x => x.Customer)
                    .Include(x => x.Promotion)
                    .Include(x => x.ChequeItems)
                    .Where(x => x.CustomerId == Model.CustomerId)
                    .Select(x => x.ViewModel)
                    .ToList();
            }

            if (Model.OrderDateFrom.HasValue)
            {
                return Context.Cheques
                    .Include(x => x.Customer)
                    .Include(x => x.Promotion)
                    .Include(x => x.ChequeItems)
                    .Where(x => x.OrderDate >= Model.OrderDateFrom && x.OrderDate <= Model.OrderDateTo)
                    .Select(x => x.ViewModel)
                    .ToList();
            }

            return new();
        }

        public ChequeViewModel? GetElement(ChequeSearchModel Model)
        {
            if (!Model.Id.HasValue)
                return null;

            using var Context = new SushiBarDatabase();
            return Context.Cheques
                    .Include(x => x.Customer)
                    .Include(x => x.Promotion)
                    .Include(x => x.ChequeItems)
                .FirstOrDefault(x => x.Id == Model.Id)?.ViewModel;
        }

        public ChequeViewModel? Insert(ChequeBindingModel Model)
        {
            using var Context = new SushiBarDatabase();
            var NewCheque = Cheque.Create(Context, Model);

            if (NewCheque == null)
                return null;

            Context.Cheques.Add(NewCheque);
            Context.SaveChanges();

            return NewCheque.ViewModel;
        }

        public ChequeViewModel? Update(ChequeBindingModel Model)
        {
            using var Context = new SushiBarDatabase();

            using var Transaction = Context.Database.BeginTransaction();
            try
            {
                var Cheque = Context.Cheques.FirstOrDefault(x => x.Id == Model.Id);

                if (Cheque == null)
                    return null;

                Cheque.Update(Model);
                Context.SaveChanges();
                Cheque.UpdateChequeItems(Context, Model);

                Transaction.Commit();
                return Cheque.ViewModel;
            }
            catch
            {
                Transaction.Rollback();
                throw;
            }
        }

        public ChequeViewModel? Delete(ChequeBindingModel Model)
        {
            using var Context = new SushiBarDatabase();
            var Cheque = Context.Cheques
                .Include(x => x.ChequeItems)
                .FirstOrDefault(rec => rec.Id == Model.Id);

            if (Cheque == null)
                return null;

            Context.Cheques.Remove(Cheque);
            Context.SaveChanges();
            return Cheque.ViewModel;
        }
    }
}