using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using LawFirmContracts.BindingModels;
using LawFirmContracts.Models;
using LawFirmContracts.SearchModels;
using LawFirmContracts.StorageContracts;
using LawFirmContracts.ViewModels;
using LawFirmDatabase.Models;

namespace LawFirmDatabase.Implements
{
    public class PaymentStorage : IPaymentStorage
    {
        public List<PaymentViewModel> GetFullList()
        {
            using var context = new LawFirmDBContext();
            return context.Payments
                .Select(x => x.GetViewModel)
                .ToList();
        }
        public List<PaymentViewModel> GetFilteredList(PaymentSearchModel model)
        {
            using var context = new LawFirmDBContext();
            return context.Payments
                .Where(x => x.Id == model.Id)
                .Select(x => x.GetViewModel)
                .ToList();
        }
        public PaymentViewModel? GetElement(PaymentSearchModel model)
        {
            if (model == null)
            {
                return null;
            }
            using var context = new LawFirmDBContext();
            if (model.Id.HasValue)
            {
                return context.Payments
                    .FirstOrDefault(x => x.Id == model.Id)?.GetViewModel;
            }
            return null;
        }
        public PaymentViewModel? Insert(PaymentBindingModel model)
        {
            using var context = new LawFirmDBContext();
            var newPayment = Payment.Create(context, model);
            if (newPayment != null)
            {
                context.Payments.Add(newPayment);
                context.SaveChanges();
                return newPayment.GetViewModel;
            }
            return null;
        }
        public PaymentViewModel? Update(PaymentBindingModel model)
        {
            using var context = new LawFirmDBContext();
            var payment = context.Payments.FirstOrDefault(x => x.Id == model.Id);
            if (payment == null)
            {
                return null;
            }
            payment.Update(context, model);
            context.SaveChanges();
            return payment.GetViewModel;
        }
        public PaymentViewModel? Delete(PaymentBindingModel model)
        {
            using var context = new LawFirmDBContext();
            var payment = context.Payments.FirstOrDefault(x => x.Id == model.Id);
            if (payment == null)
            {
                return null;
            }
            context.Payments.Remove(payment);
            context.SaveChanges();
            return payment.GetViewModel;
        }
    }
}