GES_PAC

using GES_PAC.Model;

using System.Windows.Input;

namespace GES_PAC.ViewModel

{

    public class CreateSetViewModel : BaseViewModel

    {

        #region Attributs

        private DateTime _dateTimeMAJ = DateTime.Now;

        private double? _temperature;

        private double? _humidite;

        private double? _pression;

        private bool _isFormValid;

        #endregion

        #region Commandes

        public ICommand CreateSetCommand { get; }

        #endregion

        #region Propriétés

        public DateTime DateTimeMAJ

        {

            get => _dateTimeMAJ;

        }

        public TimeSpan TimeMAJ

        {

            get => _dateTimeMAJ.TimeOfDay;

            set

            {

                var today = DateTime.Today;

                var now = DateTime.Now;

                var proposedTime = today + value;

                if (proposedTime > now.AddHours(6))

                    _dateTimeMAJ = today.AddDays(-1) + value;

                else

                    _dateTimeMAJ = today + value;

                OnPropertyChanged();

                ValidateForm();

            }

        }

        public double? Temperature

        {

            get => _temperature;

            set

            {

                _temperature = value;

                OnPropertyChanged();

                ValidateForm();

            }

        }

        public double? Pression

        {

            get => _pression;

            set

            {

                _pression = value;

                OnPropertyChanged();

                ValidateForm();

            }

        }

        public double? Humidite

        {

            get => _humidite;

            set

            {

                _humidite = value;

                OnPropertyChanged();

                ValidateForm();

            }

        }

        public bool IsFormValid

        {

            get => _isFormValid;

            set

            {

                _isFormValid = value;

                OnPropertyChanged();

            }

        }

        public bool DateMAJError { get; private set; } = true;

        public bool TemperatureError { get; private set; } = true;

        public bool HumiditeError { get; private set; } = true;

        public bool PressionError { get; private set; } = true;

        #endregion

        #region Constructeurs

        public CreateSetViewModel()

        {

            CreateSetCommand = new Command(async () => await CreateSet());

        }

        #endregion

        #region Méthodes

        private async Task CreateSet()

        {

            if (IsBusy) return;

            IsBusy = true;

            var date = DateTime.Now;

            var journeeActuelle = JourneeViewModel.Instance.GetCurrentDay();

            var newSet = new Serie(date, DateTimeMAJ, Temperature ?? 0, Humidite ?? 0, Pression ?? 0);

            journeeActuelle.AddSet(newSet);

            App.Db.Serie.Add(newSet);

            await App.Db.SaveChangesAsync();

            await Shell.Current.Navigation.PopToRootAsync();

            IsBusy = false;

        }

        private void ValidateForm()

        {

            DateMAJError = DateTimeMAJ > DateTime.Now.AddHours(-1);

            TemperatureError = Temperature == null;

            HumiditeError = Humidite == null;

            PressionError = Pression == null;

            OnPropertyChanged(nameof(DateMAJError));

            OnPropertyChanged(nameof(TemperatureError));

            OnPropertyChanged(nameof(HumiditeError));

            OnPropertyChanged(nameof(PressionError));

            IsFormValid = !DateMAJError && !TemperatureError && !HumiditeError && !PressionError;

            (CreateSetCommand as Command)?.ChangeCanExecute();

        }

        #endregion

    }

}