using AccountingWarehouseProductsContracts.BindingModels;
using AccountingWarehouseProductsContracts.ViewModels;
using AccountingWarehouseProductsDataModels.Enums;
using AccountingWarehouseProductsDataModels.Models;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace AccountingWarehouseProductsDatabaseImplement.Models
{
    public class Order : IOrderModel
    {
        public int Id { get; set; }

        public int ProductId { get; set; }

        public int SupplierId { get; set; }

        public string ProductName { get; set; }

        public int Count { get; set; }

        public double Sum { get; set; }

        public virtual Product Product { get; set; }

        public DateTime? DateofOrder { get; set; } = DateTime.Now;
        public DateTime? DateImplement { get; private set; }

        public AccountingWarehouseProductsDataModels.Enums.OrderStatus Status { get; set; }

        private Dictionary<int, (IProductModel, int)>? _orderProduct = null;

        [NotMapped]
        public Dictionary<int, (IProductModel, int)> OrderProduct
        {
            get
            {
                if (_orderProduct == null)
                {
                    _orderProduct = Products.ToDictionary(recOP => recOP.ProductId, recOP => (recOP.Product as IProductModel, recOP.Count));
                }
                return _orderProduct;
            }
        }

        [ForeignKey("OrderId")]
        public virtual List<OrderProduct> Products { get; set; } = new();

        public static Order Create(AccountingWarehouseProductsDatabase context, OrderBindingModel model)
        {
            return new Order()
            {
                Id = model.Id,
                ProductId = model.ProductId,
                SupplierId = model.SupplierId,
                ProductName = model.ProductName,
                Count = model.Count,
                Sum = model.Sum,
                Status = model.Status,
                DateofOrder = model.DateofOrder,
                DateImplement = model.DateImplement,
                Products = model.OrderProduct.Select(x => new OrderProduct
                {
                    Product = context.Products.First(y => y.Id == x.Key),
                    Count = x.Value.Item2
                }).ToList(),
            };
        }

        public void Update(OrderBindingModel model)
        {
            if (model == null)
            {
                return;
            }
            Status = model.Status;
            if (model.DateofOrder != null)
            {
                DateofOrder = model.DateofOrder;
            }
            DateImplement = model.DateImplement;
        }

        public OrderViewModel GetViewModel => new()
        {
            Id = Id,
            ProductId = ProductId,
            SupplierId = SupplierId,
            ProductName = ProductName,
            Count = Count,
            Sum = Sum,
            Status = Status,
            DateofOrder = DateofOrder,
            DateImplement = DateImplement,
            OrderProduct = OrderProduct
        };

        

        public void UpdateProducts(AccountingWarehouseProductsDatabase context, OrderBindingModel model)
        {
            var orderProduct = context.OrderProduct.Where(rec => rec.OrderId == model.Id).ToList();
            if (orderProduct != null && orderProduct.Count > 0)
            {
                context.OrderProduct.RemoveRange(orderProduct.Where(rec => !model.OrderProduct.ContainsKey(rec.ProductId)));
                context.SaveChanges();

                foreach (var updateProduct in orderProduct)
                {
                    updateProduct.Count = model.OrderProduct[updateProduct.ProductId].Item2;
                    model.OrderProduct.Remove(updateProduct.ProductId);
                }
                context.SaveChanges();
            }

            var order = context.Orders.First(x => x.Id == Id);
            foreach (var rc in model.OrderProduct)
            {
                context.OrderProduct.Add(new OrderProduct
                {
                    Order = order,
                    Product = context.Products.First(x => x.Id == rc.Key),
                    Count = rc.Value.Item2
                });
                context.SaveChanges();
            }
            _orderProduct = null;
        }
    }
}