using BankContracts.BindingModels;
using BankContracts.SearchModels;
using BankContracts.StoragesContracts;
using BankContracts.ViewModels;
using BankDatabaseImplement.Models;
using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BankDatabaseImplement.Implements
{
    public class DealStorage : IDealStorage
    {
        public List<DealViewModel> GetFullList()
        {
            using var context = new BankDatabase();
            return context.Deals.Include(x => x.Operator).Include(x => x.CreditProgram)
            .Select(x => x.GetViewModel)
            .ToList();
        }
        public List<DealViewModel> GetFilteredList(DealSearchModel model)
        {
            if (!model.Id.HasValue && !model.OperatorId.HasValue)
            {
                return new();
            }
            if (model.OperatorId.HasValue)
            {
                using var context = new BankDatabase();
                return context.Deals.Include(x => x.Operator).Include(x => x.CreditProgram)
                .Where(x => x.OperatorId == model.OperatorId)
                .Select(x => x.GetViewModel)
                .ToList();
            }
            else
            {
                using var context = new BankDatabase();
                return context.Deals.Include(x => x.Operator).Include(x => x.CreditProgram)
                .Where(x => x.Id == model.Id)
                .Select(x => x.GetViewModel)
                .ToList();
            }
        }
        public DealViewModel? GetElement(DealSearchModel model)
        {
            if (!model.Id.HasValue)
            {
                return null;
            }
            using var context = new BankDatabase();
            return context.Deals.Include(x => x.Operator).Include(x => x.CreditProgram)
            .FirstOrDefault(x => x.Id == model.Id)
            ?.GetViewModel;
        }
        public DealViewModel? Insert(DealBindingModel model)
        {
            using var context = new BankDatabase();
            var newDeal = Deal.Create(context, model);
            if (newDeal == null)
            {
                return null;
            }
            context.Deals.Add(newDeal);
            context.SaveChanges();
            return newDeal.GetViewModel;
        }
        public DealViewModel? Update(DealBindingModel model)
        {
            using var context = new BankDatabase();
            var deal = context.Deals.FirstOrDefault(x => x.Id == model.Id);
            if (deal == null)
            {
                return null;
            }
            deal.Update(model);
            context.SaveChanges();
            return deal.GetViewModel;
        }
        public DealViewModel? Delete(DealBindingModel model)
        {
            using var context = new BankDatabase();
            var element = context.Deals.FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Deals.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}