using ShipyardContracts.BindingModels;
using ShipyardContracts.ViewModels;
using ShipyardDatabaseImplement.Models;
using ShipyardDataModels.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 ShipyardDatabaseImplement.Models
{
    public class Ship : IShipModel
    {
        public int Id { get; set; }
        [Required]
        public string ShipName { get; set; } = string.Empty;
        [Required]
        public double Price { get; set; }
        private Dictionary<int, (IComponentModel, int)>? _shipComponents = null;
        [NotMapped]
        public Dictionary<int, (IComponentModel, int)> ShipComponents
        {
            get
            {
                if (_shipComponents == null)
                {
                    _shipComponents = Components.ToDictionary(recPC => recPC.ComponentId, recPC =>
                    (recPC.Component as IComponentModel, recPC.Count));
                }
                return _shipComponents;
            }
        }
        [ForeignKey("ShipId")]
        public virtual List<ShipComponent> Components { get; set; } = new();
        [ForeignKey("ShipId")]
        public virtual List<Order> Orders { get; set; } = new();
        public static Ship Create(ShipyardDataBase context,
        ShipBindingModel model)
        {
            return new Ship()
            {
                Id = model.Id,
                ShipName = model.ShipName,
                Price = model.Price,
                Components = model.ShipComponents.Select(x => new
                ShipComponent
                {
                    Component = context.Components.First(y => y.Id == x.Key),
                    Count = x.Value.Item2
                }).ToList()
            };
        }
        public void Update(ShipBindingModel model)
        {
            ShipName = model.ShipName;
            Price = model.Price;
        }
        public ShipViewModel GetViewModel => new()
        {
            Id = Id,
            ShipName = ShipName,
            Price = Price,
            ShipComponents = ShipComponents
        };
        public void UpdateComponents(ShipyardDataBase context,
        ShipBindingModel model)
        {
            var manufactureComponents = context.ShipComponents.Where(rec =>
            rec.ShipId == model.Id).ToList();
            if (manufactureComponents != null && ShipComponents.Count > 0)
            {
                context.ShipComponents.RemoveRange(manufactureComponents.Where(rec
                => !model.ShipComponents.ContainsKey(rec.ComponentId)));
                context.SaveChanges();
                foreach (var updateComponent in manufactureComponents)
                {
                    updateComponent.Count =
                    model.ShipComponents[updateComponent.ComponentId].Item2;
                    model.ShipComponents.Remove(updateComponent.ComponentId);
                }
                context.SaveChanges();
            }
            var manufacture = context.Ships.First(x => x.Id == Id);
            foreach (var pc in model.ShipComponents)
            {
                context.ShipComponents.Add(new ShipComponent
                {
                    Ship = manufacture,
                    Component = context.Components.First(x => x.Id == pc.Key),
                    Count = pc.Value.Item2
                });
                context.SaveChanges();
            }
            _shipComponents = null;
        }
    }
}