GES_PAC

using System.Windows.Input;

using GES_PAC.Model;

using GES_PAC.Helpers;

using System.Text.Json;

using System.Collections.ObjectModel;

using System.Text.Json.Serialization;

namespace GES_PAC.ViewModel

{

    public class ExportDataViewModel : BaseViewModel

    {

        #region Attributs

        private bool _hasData = false;

        public string _dataFoundText;

        #endregion

        #region Propriétés

        public bool HasData

        {

            get => _hasData;

            set

            {

                SetProperty(ref _hasData, value);

                OnPropertyChanged();

            }

        }

        public string DataFoundText

        {

            get => _dataFoundText;

            set

            {

                SetProperty(ref _dataFoundText, value);

                OnPropertyChanged();

            }

        }

        public ObservableCollection<Journee>? DayList { get; set; }

        #endregion

        #region Commandes

        public ICommand ExportJSONCommand { get; }

        public ICommand ExportCSVCommand { get; }

        public ICommand ClearDataCommand { get; }

        #endregion

        #region Constructeur

        public ExportDataViewModel()

        {

            ExportJSONCommand = new Command(ExportJSON);

            ExportCSVCommand = new Command(ExportCSV);

            ClearDataCommand = new Command(ClearData);

            DayList = JourneeViewModel.Instance?.Journees ?? null;

            HasData = DayList != null && DayList.Count > 0;

            DataFoundText = HasData ? "Données trouvées" : "Aucune donnée trouvée";

        }

        #endregion

        #region Méthodes

        private void ExportJSON()

        {

#if ANDROID

            if(IsBusy) return;

            IsBusy = true;

            var lastDay = DayList.Last();

            string fileName = lastDay.Date.ToString();

            string json = JsonSerializer.Serialize(lastDay, new JsonSerializerOptions

            {

                ReferenceHandler = ReferenceHandler.Preserve,

                WriteIndented = true

            });

            AndroidFileHelper.SaveJsonToDownloads(fileName, json);

            IsBusy = false;

#endif

        }

        private void ExportCSV()

        {

#if ANDROID

            if(IsBusy) return;

            IsBusy = true;

            var lastDay = DayList.Last();

            string folderName = lastDay.Date.ToString();

            string[] csv = JourneeToCSV.ConvertToCSV(lastDay);

            Console.WriteLine(csv[0]);

            AndroidFileHelper.SaveCSVToDownloads(folderName, csv);

            IsBusy = false;

#endif

        }

        private async void ClearData()

        {

            if (IsBusy) return;

            IsBusy = true;

            App.Db.MesureCalibration.RemoveRange(App.Db.MesureCalibration);

            App.Db.Calibration.RemoveRange(App.Db.Calibration);

            App.Db.Mesure.RemoveRange(App.Db.Mesure);

            App.Db.Comportement.RemoveRange(App.Db.Comportement);

            App.Db.SerieAnimal.RemoveRange(App.Db.SerieAnimal);

            App.Db.Serie.RemoveRange(App.Db.Serie);

            App.Db.Journee.RemoveRange(App.Db.Journee);

            App.Db.Personne.RemoveRange(App.Db.Personne);

            App.Db.Lieu.RemoveRange(App.Db.Lieu);

            var place = new Lieu("Elevage Langlade", "INRAE", "Mouton");

            var person = new Personne("Bond", "James", "jamesbond@inrae.fr");

            App.Db.Personne.Add(person);

            App.Db.Lieu.Add(place);

            await App.Db.SaveChangesAsync();

            IsBusy = false;

        }

        #endregion

    }

}