using LawCompanyContracts.BindingModels;
using LawCompanyContracts.ViewModels;
using LawCompanyDatabaseImplement.Models;
using LawCompanyDataModels.Models;
using System.ComponentModel.DataAnnotations.Schema;
using System.ComponentModel.DataAnnotations;

namespace LawCompanyDatabaseImplement.Models
{
    public class Consultation : IConsultationModel
    {
        public int Id { get; private set; }
        [Required]
        public double Cost { get; private set; }
        [Required]
        public DateTime ConsultationDate { get; private set; }
        [Required]
        public int CaseId { get; private set; }
        public Case Case { get; private set; }
        public int GuarantorId { get; set; }

        private Dictionary<int, ILawyerModel>? _consultationLawyers = null;
        [ForeignKey("ConsultationId")]
        public virtual List<ConsultationLawyer> Lawyers { get; set; } = new();
        [NotMapped]
        public Dictionary<int, ILawyerModel> ConsultationLawyers
        {
            get
            {
                if (_consultationLawyers == null)
                {
                    using var context = new LawCompanyDatabase();
                    _consultationLawyers = Lawyers
                     .ToDictionary(x => x.LawyerId, x => (context.Lawyers
                         .FirstOrDefault(y => y.Id == x.LawyerId) as ILawyerModel));
                }
                return _consultationLawyers;
            }
        }
        public static Consultation? Create(LawCompanyDatabase context, ConsultationBindingModel? model)
        {
            if (model == null)
            {
                return null;
            }
            var consultations = context.Consultations.Where(x => x.CaseId == model.CaseId).ToList();
            if (consultations.Count > 0)
            {
                return null;
            }
            return new Consultation()
            {
                Id = model.Id,
                Cost = model.Cost,
                ConsultationDate = model.ConsultationDate,
                CaseId = model.CaseId,
                Case = context.Cases.First(x => x.Id == model.CaseId),
                GuarantorId = model.GuarantorId,
                Lawyers = model.ConsultationLawyers.Select(x => new ConsultationLawyer
                {
                    Lawyer = context.Lawyers.First(y => y.Id == x.Key)
                }).ToList()
            };
        }
        public void Update(ConsultationBindingModel? model)
        {
            using var context = new LawCompanyDatabase();

            if (model == null)
            {
                return;
            }

            Cost = model.Cost;
            ConsultationDate = model.ConsultationDate;
            CaseId = model.CaseId;
        }
        public ConsultationViewModel GetViewModel => new()
        {
            Id = Id,
            Cost = Cost,
            ConsultationDate = ConsultationDate,
            CaseId = CaseId,
            GuarantorId = GuarantorId,
            ConsultationLawyers = ConsultationLawyers
        };
        public void UpdateLawyers(LawCompanyDatabase context,
       ConsultationBindingModel model)
        {
            var consultationLawyers = context.ConsultationLawyers
                .Where(rec => rec.ConsultationId == model.Id)
                .ToList();
            if (consultationLawyers != null && consultationLawyers.Count > 0)
            {
                context.ConsultationLawyers
                    .RemoveRange(consultationLawyers
                    .Where(rec => !model.ConsultationLawyers
                    .ContainsKey(rec.LawyerId)));
                context.SaveChanges();
            }
            var _consultation = context.Consultations.First(x => x.Id == Id);
            foreach (var pc in model.ConsultationLawyers)
            {
                if (!ConsultationLawyers.ContainsKey(pc.Key))
                {
                    context.ConsultationLawyers.Add(new ConsultationLawyer
                    {
                        Consultation = _consultation,
                        Lawyer = context.Lawyers.First(x => x.Id == pc.Key),
                    });
                }
                context.SaveChanges();
            }
            _consultationLawyers = null;
        }
    }
}