using SushiBarContracts.BindingModels;
using SushiBarContracts.SearchModels;
using SushiBarContracts.StoragesContracts;
using SushiBarContracts.ViewModels;
using SushiBarDatabaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SushiBarDatabaseImplement.Implements
{
    public class BuyerStorage : IBuyerStorage
    {

        public List<BuyerViewModel> GetFilteredList(BuyerSearchModel model)
        {
            if (string.IsNullOrEmpty(model.BuyerName))
            {
                return new();
            }
            using var context = new SushiBarDatabase();
            return context.Buyers.Where(x => x.BuyerName.Contains(model.BuyerName)).Select(x => x.GetViewModel).ToList();
        }

        public List<BuyerViewModel> GetFullList()
        {
            using var context = new SushiBarDatabase();
            return context.Buyers.Select(x=>x.GetViewModel).ToList();
        }

        public BuyerViewModel? Delete(BuyerBindingModel model)
        {
            using var context = new SushiBarDatabase();
            var element = context.Buyers.FirstOrDefault(x => x.Id == model.Id);
            if (element != null)
            {
                context.Buyers.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }

        public BuyerViewModel? GetElement(BuyerSearchModel model)
        {
            using var context = new SushiBarDatabase();
            return context.Buyers.FirstOrDefault(x => (!string.IsNullOrEmpty(model.BuyerName)) && x.BuyerName == model.BuyerName || model.Id.HasValue && x.Id == model.Id)?.GetViewModel;
        }

        public BuyerViewModel? Insert(BuyerBindingModel model)
        {
            var newBuyer = Buyer.Create(model);
            if (newBuyer == null)
            {
                return null;
            }
            using var context = new SushiBarDatabase();
            context.Buyers.Add(newBuyer);
            context.SaveChanges();
            return newBuyer.GetViewModel;
        }

        public BuyerViewModel? Update(BuyerBindingModel model)
        {
            using var context = new SushiBarDatabase();
            var component = context.Buyers.FirstOrDefault(x => x.Id == model.Id);
            if (component == null)
            {
                return null;
            }
            component.Update(model);
            context.SaveChanges();
            return component.GetViewModel;
        }
    }
}