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

namespace ConfectioneryDatabaseImplement.Implements
{
    public class OrderStorage : IOrderStorage
    {
        public List<OrderViewModel> GetFullList()
        {
            using var context = new ConfectioneryDatabase();
            return context.Orders.Include(x => x.Pastry).Select(x => x.GetViewModel).ToList();
        }

        public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
        {
            using var context = new ConfectioneryDatabase();
            if (model.DateFrom.HasValue)
            {
                return context.Orders.Include(x => x.Pastry).Where(x => x.DateCreate >= model.DateFrom && x.DateCreate <= model.DateTo).Select(x => x.GetViewModel).ToList();
            }
            return context.Orders.Include(x => x.Pastry).Where(x => x.Id == model.Id).Select(x => x.GetViewModel).ToList();
        }

        public OrderViewModel? GetElement(OrderSearchModel model)
        {
            if (!model.Id.HasValue)
            {
                return new();
            }
            using var context = new ConfectioneryDatabase();
            return context.Orders.Include(x => x.Pastry).FirstOrDefault(x => x.Id == model.Id)?.GetViewModel;
        }

        public OrderViewModel? Insert(OrderBindingModel model)
        {
            using var context = new ConfectioneryDatabase();
            if (model == null)
                return null;
            var newOrder = Order.Create(context, model);
            if (newOrder == null)
            {
                return null;
            }
            context.Orders.Add(newOrder);
            context.SaveChanges();
            return newOrder.GetViewModel;
        }

        public OrderViewModel? Update(OrderBindingModel model)
        {
            using var context = new ConfectioneryDatabase();
            var order = context.Orders.FirstOrDefault(x => x.Id == model.Id);
            if (order == null)
            {
                return null;
            }
            order.Update(model);
            context.SaveChanges();
            return order.GetViewModel;
        }

        public OrderViewModel? Delete(OrderBindingModel model)
        {
            using var context = new ConfectioneryDatabase();
            var order = context.Orders.FirstOrDefault(rec => rec.Id == model.Id);
            if (order != null)
            {
                context.Orders.Remove(order);
                context.SaveChanges();
                return order.GetViewModel;
            }
            return null;
        }
    }
}