using Contracts.BindingModels;
using Contracts.ViewModels;
using DataModels.Enums;
using DataModels.Models;
using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Runtime.Serialization;
using System.Text;
using System.Threading.Tasks;

namespace DatabaseImplement.Models
{
    public class Supply : ISupply
    {
        public Guid Id { get; set; }
        [Required]
        public string Name { get; set; } = string.Empty;
        [Required]
        public double Price { get; set; }
        [Required]
        public Guid SupplierId { get; set; }
        [Required]
        public DateTime Date { get; set; }
        public DateTime? DateArriving { get; private set; }
        public DateTime? DateComplete { get; private set; }
        [Required]
        public SupplyStatus Status { get; set; } = SupplyStatus.Pending;
        private Dictionary<Guid, (IProduct, int)>? _supplyProducts = null;
        [NotMapped]
        public Dictionary<Guid, (IProduct, int)> SupplyProducts
        {
            get
            {
                if (_supplyProducts == null)
                {
                    _supplyProducts = Products
                    .ToDictionary(recPC => recPC.Id, recPC =>
                    (recPC.Product as IProduct, recPC.Count));
                }
                return _supplyProducts;
            }
        }
        [ForeignKey("SupplyId")]
        public virtual List<SupplyProduct> Products { get; set; } = new();
        public virtual Supplier Supplier { get; set; }
        public static Supply Create(Database context, SupplyBindingModel model)
        {
            return new Supply()
            {
                Id = model.Id,
                Name = model.Name,
                Price = model.Price,
                Date = model.Date,
                DateArriving = model.DateArriving,
                DateComplete = model.DateComplete,
                SupplierId = model.SupplierId,
                Products = model.SupplyProducts.Select(x => new
                SupplyProduct
                {
                    Product = context.Products.First(y => y.Id == x.Key),
                    Count = x.Value.Item2
                }).ToList(),
                Status = SupplyStatus.Pending,
            };
        }
        public void Update(SupplyBindingModel model)
        {
            Status = model.Status;
            DateArriving = model.DateArriving;
            DateComplete = model.DateComplete;
        }
        public SupplyViewModel GetViewModel
        {
            get
            {
                var context = new Database();
                return new()
                {
                    Id = Id,
                    Name = Name,
                    Price = Price,
                    Products = SupplyProducts,
                    SupplierId = SupplierId,
                    Date = Date,
                    DateArriving = DateArriving,
                    DateComplete = DateComplete,
                    Status = Status,
                    SupplierName = Supplier.Name,
                };
            }
        }
    }
}