using BarberShopContracts.BindingModels;
using BarberShopContracts.BusinessLogicContracts;
using BarberShopContracts.SearchModels;
using BarberShopContracts.StorageContracts;
using BarberShopContracts.ViewModels;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BarberShopBusinessLogic
{
    public class AppointmentLogic : IAppointmentLogic
    {
        public readonly ILogger _logger;
        public readonly IAppointmentStorage _appointmentStorage;

        public AppointmentLogic(ILogger<AppointmentLogic> logger, IAppointmentStorage appointmentStorage)
        {
            _logger = logger;
            _appointmentStorage = appointmentStorage;
        }

        public List<AppointmentViewModel>? ReadList(AppointmentSearchModel? model)
        {
            _logger.LogInformation("ReadList. Id:{ Id}", model?.Id);
            var list = model == null ? _appointmentStorage.GetFullList() : _appointmentStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }

        public AppointmentViewModel? ReadElement(AppointmentSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. Id:{ Id}", model.Id);
            var element = _appointmentStorage.GetElement(model);
            if (element == null)
            {
                _logger.LogWarning("ReadElement element not found");
                return null;
            }
            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
            return element;
        }

        public bool Create(AppointmentBindingModel model)
        {
            CheckModel(model);
            if (_appointmentStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

        public bool Delete(AppointmentBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation("Delete. Id:{Id}", model.Id);
            if (_appointmentStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }

        public bool Update(AppointmentBindingModel model)
        {
            CheckModel(model);
            if (_appointmentStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }

        private void CheckModel(AppointmentBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (model.Time < DateTime.Now)
            {
                throw new ArgumentNullException("Некорректная дата", nameof(model.Time));
            }
            _logger.LogInformation("Time. Time:{Time}. Id: { Id}", model.Time, model.Id);
        }
    }
}