using ConfectioneryContracts.BindingModels;
using ConfectioneryContracts.SearchModels;
using ConfectioneryContracts.StoragesContract;
using ConfectioneryContracts.ViewModels;
using ConfectioneryDatabaseImplement.Models;
using Microsoft.EntityFrameworkCore;

namespace ConfectioneryDatabaseImplement.Implements
{
    public class OrderStorage : IOrderStorage
    {
        public OrderViewModel? Delete(OrderBindingModel model)
        {
            using var context = new ConfectioneryDatabase();
            var element = context.Orders
                .Include(x => x.Client)
				.Include(x => x.Implementer)
                .FirstOrDefault(x => x.Id == model.Id);
            if (element != null)
            {
                context.Orders.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }

        public OrderViewModel? GetElement(OrderSearchModel model)
        {
            using var context = new ConfectioneryDatabase();
            // Находим первого либо по айди заказа, либо по айди исполнителя, либо по айди исполнителя и статусу заказа, исходя из того что есть в модели
			return context.Orders
					.Include(x => x.Client)
					.Include(x => x.Implementer)
					.FirstOrDefault(x =>
                        (!model.Status.HasValue || model.Status.HasValue && x.Status == model.Status) &&
						model.ImplementerId.HasValue && x.ImplementerId == model.ImplementerId ||
                        model.Id.HasValue            && x.Id == model.Id
                    )
					?.GetViewModel;
        }

        public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
        {
			if (model.Id.HasValue)
			{
				var result = GetElement(model);
				return result != null ? new() { result } : new();
			}

			using var context = new ConfectioneryDatabase();
			IQueryable<Order>? queryWhere = null;

			if (model.DateFrom.HasValue && model.DateTo.HasValue) // если не ищем по айдишнику, значит ищем по диапазону дат
			{
				queryWhere = context.Orders
					.Where(x => model.DateFrom <= x.DateCreate.Date &&
												  x.DateCreate.Date <= model.DateTo);
			}
			else if (model.Status.HasValue)
			{
				queryWhere = context.Orders.Where(x => x.Status == model.Status);
			}
			else if (model.ClientId.HasValue)
			{
				queryWhere = context.Orders.Where(x => x.ClientId == model.ClientId);
			}
			else
			{
				return new();
			}
			return queryWhere
					.Include(x => x.Client)
					.Include(x => x.Implementer)
					.Select(x => x.GetViewModel)
					.ToList();
        }

        public List<OrderViewModel> GetFullList()
        {
            using var context = new ConfectioneryDatabase();
            return context.Orders
                .Include(x => x.Client)
				.Include(x => x.Implementer)
				.Select(x => x.GetViewModel)
                .ToList();
        }

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

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