using BeautySalonContracts.BindingModels;
using BeautySalonContracts.ViewModels;
using BeautySalonDataModels.Models;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace BeautySalonDatabaseImplement.Models
{
    public class Master : IMasterModel
    {
        public int Id { get; private set; }
        [Required]
        public string MasterFIO { get; set; } = string.Empty;
        [Required]
        public string Specialization { get; set; } = string.Empty;
        private Dictionary<int, (IServiceModel, int)>? _masterServices = null;
        [NotMapped]
        public Dictionary<int, (IServiceModel, int)> MasterServices
        {
            get
            {
                if (_masterServices == null)
                {
                    _masterServices = Services
                    .ToDictionary(recPC => recPC.MasterId, recPC =>
                   (recPC.Service as IServiceModel, recPC.Count));
                }
                return _masterServices;
            }
        }
        [ForeignKey("MasterId")]
        public virtual List<MasterService> Services { get; set; } = new();
        [ForeignKey("MasterId")]
        public virtual List<Visit> Visits { get; set; } = new();
        public static Master Create(BeautySalonDatabase context, MasterBindingModel model)
        {
            return new Master
            {
                Id = model.Id,
                MasterFIO = model.MasterFIO,
                Specialization = model.Specialization,
                Services = model.MasterServices.Select(x => new MasterService
                {
                    Service = context.Services.First(y => y.Id == x.Key),
                    Count = x.Value.Item2
                }).ToList()
            };
        }
        public void Update(MasterBindingModel model)
        {
            MasterFIO = model.MasterFIO;
            Specialization = model.Specialization;
        }
        public MasterViewModel GetViewModel => new()
        {
            Id = Id,
            MasterFIO = MasterFIO,
            Specialization = Specialization,
            MasterServices = MasterServices
        };
        public void UpdateServices(BeautySalonDatabase context, MasterBindingModel model)
        {
            var masterServices = context.MasterServices.Where(rec => rec.MasterId == model.Id).ToList();
            if (masterServices != null && masterServices.Count > 0)
            { // удалили те, которых нет в модели
                context.MasterServices.RemoveRange(masterServices.Where(rec
               => !model.MasterServices.ContainsKey(rec.ServiceId)));
                context.SaveChanges();
                // обновили количество у существующих записей
                foreach (var updateService in masterServices)
                {
                    updateService.Count =
                   model.MasterServices[updateService.ServiceId].Item2;
                    model.MasterServices.Remove(updateService.ServiceId);
                }
                context.SaveChanges();
            }
            var master = context.Masters.First(x => x.Id == Id);
            foreach (var pc in model.MasterServices)
            {
                context.MasterServices.Add(new MasterService
                {
                    Master = master,
                    Service = context.Services.First(x => x.Id == pc.Key),
                    Count = pc.Value.Item2
                });
                context.SaveChanges();
            }
            _masterServices = null;
        }
    }
}