using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.Core.Commands;
using Tango.Core.DI;
using Tango.FSE.Common;
using Tango.FSE.Common.Storage;

namespace Tango.FSE.Procedures.Dialogs
{
    public class OpenFileDialogViewVM : FSEDialogViewVM
    {
        [TangoInject]
        protected IStorageProvider StorageProvider { get; set; }

        private String _selectedFile;
        public String SelectedFile
        {
            get { return _selectedFile; }
            set { _selectedFile = value; RaisePropertyChangedAuto(); InvalidateRelayCommands(); }
        }

        public String Extension { get; set; }
        public String Message { get; set; }

        public RelayCommand BrowseCommand { get; set; }

        public OpenFileDialogViewVM(String message, String extension)
        {
            TangoIOC.Default.Inject(this);

            AutoMode = true;
            Message = message;
            Extension = extension;

            BrowseCommand = new RelayCommand(BrowseForFile);
        }

        private async void BrowseForFile()
        {
            var result = await StorageProvider.OpenFile("Browse for file", $"Files|{Extension}");

            if (result.Confirmed)
            {
                SelectedFile = result.SelectedItem;
            }
        }

        protected override bool CanOK()
        {
            return base.CanOK() && SelectedFile != null;
        }

        protected override void Cancel()
        {
            SelectedFile = null;
            base.Cancel();
        }
    }
}