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).Include(x => x.Client).Include(y => y.Implementer).Select(x => x.GetViewModel).ToList();
		}

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

        public OrderViewModel? GetElement(OrderSearchModel model)
        {
			if (!model.Id.HasValue && (!model.ImplementerId.HasValue || !model.Status.HasValue))
			{
				return new();
			}
			using var context = new ConfectioneryDatabase();
			return context.Orders.Include(x => x.Pastry).Include(x => x.Client).Include(x => x.Implementer).FirstOrDefault(x =>
				(model.Id.HasValue && x.Id == model.Id) ||
				(model.ImplementerId.HasValue && x.ImplementerId == model.ImplementerId && x.Status == model.Status))
				?.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(context, 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;
        }
    }
}