using PrecastConcretePlantDataModels.Models;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations.Schema;
using System.ComponentModel.DataAnnotations;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using PrecastConcretePlantContracts.BindingModels;
using PrecastConcretePlantContracts.ViewModels;

namespace PrecastConcretePlantDatabaseImplement.Models
{
    public class Reinforced : IReinforcedModel
    {
        public int Id { get; set; }

        [Required]
        public string ReinforcedName { get; set; } = string.Empty;

        [Required]
        public double Price { get; set; }

        private Dictionary<int, (IComponentModel, int)>? _ReinforcedComponents = null;

        [NotMapped]//заполняется при обращеии к гетвьюмодел
        public Dictionary<int, (IComponentModel, int)> ReinforcedComponents
        {
            get
            {
                if (_ReinforcedComponents == null)
                {
                    _ReinforcedComponents = Components
                    .ToDictionary(recPC => recPC.ComponentId, recPC =>
                   (recPC.Component as IComponentModel, recPC.Count));
                }
                return _ReinforcedComponents;
            }
        }

        [ForeignKey("ReinforcedId")] //список записей класса-связи
        public virtual List<ReinforcedComponent> Components { get; set; } = new();

        [ForeignKey("ReinforcedId")]
        public virtual List<Order> Orders { get; set; } = new();

        public static Reinforced Create(PrecastConcretePlantDataBase context, ReinforcedBindingModel model)
        {
            return new Reinforced()
            {
                Id = model.Id,
                ReinforcedName = model.ReinforcedName,
                Price = model.Price,
                Components = model.ReinforcedComponents.Select(x => 
                    new ReinforcedComponent
                    {
                        Component = context.Components.First(y => y.Id == x.Key),
                        Count = x.Value.Item2
                    }).ToList()
            };
        }
        public void Update(ReinforcedBindingModel model)
        {
            ReinforcedName = model.ReinforcedName;
            Price = model.Price;
        }
        public ReinforcedViewModel GetViewModel => new()
        {
            Id = Id,
            ReinforcedName = ReinforcedName,
            Price = Price,
            ReinforcedComponents = ReinforcedComponents
        };
        //метод обновления списка связей(вместо контейнски)
        public void UpdateComponents(PrecastConcretePlantDataBase context, ReinforcedBindingModel model)
        {
            var ReinforcedComponents = context.ReinforcedComponents
                .Where(rec => rec.ReinforcedId == model.Id).ToList();

            if (ReinforcedComponents != null && ReinforcedComponents.Count > 0)
            { //удаляем те, которых нет в модели
                context.ReinforcedComponents.RemoveRange(ReinforcedComponents
                    .Where(rec => !model.ReinforcedComponents.ContainsKey(rec.ComponentId)));
                context.SaveChanges();
                //обновляем кол-во у сущ-х записей
                foreach (var updateComponent in ReinforcedComponents)
                {
                    updateComponent.Count =
                   model.ReinforcedComponents[updateComponent.ComponentId].Item2;
                    model.ReinforcedComponents.Remove(updateComponent.ComponentId);
                }
                context.SaveChanges();
            }
            var Reinforced = context.Reinforceds.First(x => x.Id == Id);
            foreach (var pc in model.ReinforcedComponents)
            {
                context.ReinforcedComponents.Add(new ReinforcedComponent
                {
                    Reinforced = Reinforced,
                    Component = context.Components.First(x => x.Id == pc.Key),
                    Count = pc.Value.Item2
                });
                context.SaveChanges();
            }
            _ReinforcedComponents = null;
        }
    }
}