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

namespace PrecastConcretePlantDatabaseImplement.Implements
{
	public class OrderStorage : IOrderStorage
	{
		public List<OrderViewModel> GetFullList()
		{
			using var context = new PrecastConcretePlantDatabase();
			return context.Orders
			.Include(x => x.Reinforced).Include(x => x.Client).Include(x => x.Implementer).Select(x => x.GetViewModel).ToList();
		}
		public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
		{
			if (model.Id.HasValue)
			{
				var result = GetElement(model);
				return result != null ? new() { result } : new();
			}

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

			if (model.DateFrom.HasValue && model.DateTo.HasValue)
			{
				queryWhere = context.Orders
					.Where(x => model.DateFrom <= x.DateCreate.Date &&
												  x.DateCreate.Date <= model.DateTo);
			}

			else if (model.Statuses != null)
			{
				queryWhere = context.Orders.Where(x => model.Statuses.Contains(x.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 OrderViewModel? GetElement(OrderSearchModel model)
		{
			if (!model.Id.HasValue)
			{
				return null;
			}
			using var context = new PrecastConcretePlantDatabase();
			return context.Orders.Include(x => x.Client).Include(x => x.Implementer).FirstOrDefault(x =>
						(model.Statuses == null || model.Statuses != null && model.Statuses.Contains(x.Status)) &&
						model.ImplementerId.HasValue && x.ImplementerId == model.ImplementerId ||
						model.Id.HasValue && x.Id == model.Id
					)?.GetViewModel;
		}
		public OrderViewModel? Insert(OrderBindingModel model)
		{
			var newOrder = Order.Create(model);
			if (newOrder == null)
			{
				return null;
			}
			using var context = new PrecastConcretePlantDatabase();
			context.Orders.Add(newOrder);
			context.SaveChanges();
			return newOrder.GetViewModel;
		}
		public OrderViewModel? Update(OrderBindingModel model)
		{
			using var context = new PrecastConcretePlantDatabase();

			var order = context.Orders
				.Include(x => x.Reinforced)
				.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;
		}
		public OrderViewModel? Delete(OrderBindingModel model)
		{
			using var context = new PrecastConcretePlantDatabase();

			var element = context.Orders
				.Include(x => x.Reinforced)
				.Include(x => x.Client)
				.Include(x => x.Implementer)
				.FirstOrDefault(rec => rec.Id == model.Id);

			if (element != null)
			{
				context.Orders.Remove(element);
				context.SaveChanges();
				return element.GetViewModel;
			}
			return null;
		}
	}
}