using CarRepairShopContracts.BindingModels;
using CarRepairShopContracts.SearchModels;
using CarRepairShopContracts.StoragesContracts;
using CarRepairShopContracts.ViewModels;
using CarRepairShopDatabaseImplement.Models;
using Microsoft.EntityFrameworkCore;

namespace CarRepairShopDatabaseImplement.Implements
{
    public class RepairStorage : IRepairStorage
    {
        public List<RepairViewModel> GetFullList()
        {
            using var context = new RepairsShopDatabase();
            return context.Repairs
             .Include(x => x.Components)
            .ThenInclude(x => x.Component)
            .ToList()
            .Select(x => x.GetViewModel)
            .ToList();
        }
        public List<RepairViewModel> GetFilteredList(RepairSearchModel model)
        {
            if (string.IsNullOrEmpty(model.RepairName))
            {
                return new();
            }
            using var context = new RepairsShopDatabase();
            return context.Repairs
             .Include(x => x.Components)
            .ThenInclude(x => x.Component)
            .Where(x => x.RepairName.Contains(model.RepairName))
            .ToList()
            .Select(x => x.GetViewModel)
            .ToList();
        }
        public RepairViewModel? GetElement(RepairSearchModel model)
        {
            if (string.IsNullOrEmpty(model.RepairName) &&
            !model.Id.HasValue)
            {
                return null;
            }
            using var context = new RepairsShopDatabase();
            return context.Repairs
             .Include(x => x.Components)
             .ThenInclude(x => x.Component)
             .FirstOrDefault(x => (!string.IsNullOrEmpty(model.RepairName) &&
            x.RepairName == model.RepairName) ||
            (model.Id.HasValue && x.Id ==
            model.Id))
            ?.GetViewModel;
        }
        public RepairViewModel? Insert(RepairBindingModel model)
        {
            using var context = new RepairsShopDatabase();
            var newRepair = Repair.Create(context, model);
            if (newRepair == null)
            {
                return null;
            }
            context.Repairs.Add(newRepair);
            context.SaveChanges();
            return newRepair.GetViewModel;
        }
        public RepairViewModel? Update(RepairBindingModel model)
        {
            using var context = new RepairsShopDatabase();
            using var transaction = context.Database.BeginTransaction();
            try
            {
                var Repair = context.Repairs.FirstOrDefault(rec =>
                rec.Id == model.Id);
                if (Repair == null)
                {
                    return null;
                }
                Repair.Update(model);
                context.SaveChanges();
                Repair.UpdateComponents(context, model);
                transaction.Commit();
                return Repair.GetViewModel;
            }
            catch
            {
                transaction.Rollback();
                throw;
            }
        }
        public RepairViewModel? Delete(RepairBindingModel model)
        {
            using var context = new RepairsShopDatabase();
            var element = context.Repairs
            .Include(x => x.Components)
            .FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Repairs.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}