using PrecastConcretePlantDataModels.Models;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations.Schema;
using System.ComponentModel.DataAnnotations;
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]
        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")]
        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
        };
        public void UpdateComponents(PrecastConcretePlantDatabase context, ReinforcedBindingModel model)
        {
            var reinforcedComponents = context.ReinforcedComponents.Where(rec => rec.ReinforcedId == model.Id).ToList();
            if (reinforcedComponents != null && reinforcedComponents.Count > 0)
            { // удалили те, которых нет в модели
                context.ReinforcedComponents.RemoveRange(reinforcedComponents.Where(rec => !model.ReinforcedComponents.ContainsKey(rec.ComponentId)));
                context.SaveChanges();
                // обновили количество у существующих 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 rp in model.ReinforcedComponents)
            {
                context.ReinforcedComponents.Add(new ReinforcedComponent
                {
                    Reinforced = reinforced,
                    Component = context.Components.First(x => x.Id == rp.Key),
                    Count = rp.Value.Item2
                });
                context.SaveChanges();
            }
            _reinforcedComponents = null;
        }
    }

}