using STOContracts.BindingModels;
using STOContracts.ViewModels;
using STODatabaseImplement;
using STODataModels;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DatabaseImplement
{
    public class Car : ICarModel
    {
        public int Id { get ; private set; }

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

        public string CarBrand { get; private set; } = string.Empty;

        public string CarModel { get; private set; } = string.Empty;

        public DateTime Year { get; private set; } = DateTime.MinValue;
        [ForeignKey("CarId")]
        public virtual List<Service> Services { get; private set; } = new();

        [Required]
        public int ClientId { get; private set; }
        public virtual Client Client { get; set; } = new();

        public Dictionary<int, (ITechnicalWorkModel, int)> _CarTechnicalWorks = null;
        [ForeignKey("CarId")]
        public virtual List<CarTechnicalWork> TechnicalWorks { get; set; } = new();

        [NotMapped]
        public Dictionary<int, (ITechnicalWorkModel, int)> CarTechnicalWorks
        {
            get
            {
                if (_CarTechnicalWorks == null)
                {
                    _CarTechnicalWorks = TechnicalWorks
                    .ToDictionary(recPC => recPC.Id, recPC =>
                   (recPC.TechnicalWork as ITechnicalWorkModel, recPC.Count));
                }
                return _CarTechnicalWorks;
            }
        }

        public static Car Create(STODatabase context, CarBindingModel model)
        {
            if (model == null)
            {
                return null;
            }
            return new Car()
            {
                ClientId = model.ClientId,
                Client = context.Clients.First(x => x.Id == model.ClientId),
                Id = model.Id,
                CarNumber = model.CarNumber,
                CarBrand = model.CarBrand,
                CarModel = model.CarModel,
                TechnicalWorks = model.CarTechnicalWorks.Select(x => new
                CarTechnicalWork
                {
                    TechnicalWork = context.TechnicalWorks.First(y => y.Id == x.Key),
                    Count = x.Value.Item2
                }).ToList()
            };
        }
        public void Update(CarBindingModel model)
        {
            if (model == null)
            {
                return;
            }
            CarNumber = model.CarNumber;
            CarBrand = model.CarBrand;
            CarModel = model.CarModel;
            Year = model.Year;
        }
        public CarViewModel GetViewModel => new()
        {
            Id = Id,
            CarNumber = CarNumber,
            CarBrand = CarBrand,
            CarModel = CarModel,
            Year = Year
        };

        public void UpdateTechnicalWorks(STODatabase context, CarBindingModel model)
        {
            var technicalWorks = context.CarTechnicalWork.Where(rec =>
            rec.CarId == model.Id).ToList();
            if (technicalWorks != null && CarTechnicalWorks.Count > 0)
            {
                context.CarTechnicalWork.RemoveRange(technicalWorks.Where(rec
                => !model.CarTechnicalWorks.ContainsKey(rec.TechnicalWorkId)));
                context.SaveChanges();
                foreach (var updateComponent in technicalWorks)
                {
                    updateComponent.Count =
                    model.CarTechnicalWorks[updateComponent.TechnicalWorkId].Item2;
                    model.CarTechnicalWorks.Remove(updateComponent.TechnicalWorkId);
                }
                context.SaveChanges();
            }
            var manufacture = context.Cars.First(x => x.Id == Id);
            foreach (var pc in model.CarTechnicalWorks)
            {
                context.CarTechnicalWork.Add(new CarTechnicalWork
                {
                    Car = manufacture,
                    TechnicalWork = context.TechnicalWorks.First(x => x.Id == pc.Key),
                    Count = pc.Value.Item2
                });
                context.SaveChanges();
            }
            _CarTechnicalWorks = null;
        }

    }
}