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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.Core.Commands;
using Tango.Core.DI;
using Tango.Explorer;
using Tango.PPC.BackupRestore.Views;
using Tango.PPC.Common;
using Tango.PPC.Common.BackupRestore;
using Tango.PPC.Storage;
using static Tango.PPC.BackupRestore.ViewModels.RestoreErrorViewVM;
namespace Tango.PPC.BackupRestore.ViewModels
{
public class RestoreViewVM : PPCViewModel
{
private string _backupFileLocation;
private bool _isBrowsing;
[TangoInject]
public IBackupManager BackupManager { get; set; }
private String _backupFileName;
public String BackupFileName
{
get { return _backupFileName; }
set { _backupFileName = value; RaisePropertyChangedAuto(); InvalidateRelayCommands(); }
}
private RestoreSettings _restoreSettings;
public RestoreSettings RestoreSettings
{
get { return _restoreSettings; }
set { _restoreSettings = value; RaisePropertyChangedAuto(); }
}
private BackupFile _backupFile;
public BackupFile BackupFile
{
get { return _backupFile; }
set { _backupFile = value; RaisePropertyChangedAuto(); }
}
private BackupRestoreProgressEventArgs _currentRestoreProgress;
public BackupRestoreProgressEventArgs CurrentRestoreProgress
{
get { return _currentRestoreProgress; }
set { _currentRestoreProgress = value; RaisePropertyChangedAuto(); }
}
private long _backupSize;
public long BackupSize
{
get { return _backupSize; }
set { _backupSize = value; RaisePropertyChangedAuto(); }
}
public RelayCommand BrowseForBackupCommand { get; set; }
public RelayCommand RestoreCommand { get; set; }
public RestoreViewVM()
{
RestoreSettings = new RestoreSettings();
RestoreCommand = new RelayCommand(StartRestore, () => BackupFileName != null);
BrowseForBackupCommand = new RelayCommand(BrowseForBackup);
}
private async void StartRestore()
{
await NavigationManager.NavigateTo<BackupRestoreModule>(nameof(RestoreProgressView), false);
try
{
IsFree = false;
NavigationManager.IsBackEnabled = false;
var result = await BackupManager.Restore(_backupFileLocation, RestoreSettings);
await NavigationManager.NavigateWithObject<BackupRestoreModule, RestoreCompletedView, RestoreResult>(result, false);
}
catch (Exception ex)
{
LogManager.Log(ex, "The restore operation failed.");
await NavigationManager.NavigateWithObject<BackupRestoreModule, RestoreErrorView, RestoreErrorNavigationObject>(new RestoreErrorNavigationObject()
{
Error = ex.FlattenMessage(),
}, false);
NavigationManager.IsBackEnabled = true;
}
finally
{
IsFree = true;
}
}
private async void BrowseForBackup()
{
_isBrowsing = true;
var result = await NavigationManager.
NavigateForResult<StorageModule,
Storage.Views.MainView, ExplorerFileItem,
Storage.Models.StorageNavigationRequest>(
new Storage.Models.StorageNavigationRequest()
{
Intent = Storage.Models.StorageNavigationIntent.LoadFile,
Filter = ExplorerFileDefinition.Backup.Extension,
Title = "Select Backup File",
});
_isBrowsing = false;
if (result != null)
{
_backupFileLocation = result.Path;
try
{
BackupFile = await BackupManager.ExtractBackupConfiguration(_backupFileLocation);
BackupFileName = Path.GetFileName(result.Path);
BackupSize = new System.IO.FileInfo(_backupFileLocation).Length;
}
catch (Exception ex)
{
LogManager.Log(ex, $"Error extracting backup configuration from file '{_backupFileLocation}'.");
await NotificationProvider.ShowError($"Error occurred while trying to extract the backup file information\n{ex.FlattenMessage()}");
}
}
}
public override Task<bool> OnNavigateBackRequest()
{
return Task.FromResult(IsFree);
}
public override void OnNavigatedFrom()
{
base.OnNavigatedFrom();
if (!_isBrowsing)
{
BackupFileName = null;
BackupFile = null;
_backupFileLocation = null;
}
}
public override void OnApplicationReady()
{
base.OnApplicationReady();
BackupManager.Progress += BackupManager_Progress;
}
private void BackupManager_Progress(object sender, BackupRestoreProgressEventArgs e)
{
CurrentRestoreProgress = e;
}
public override void OnApplicationStarted()
{
}
}
}
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