Libation/Source/LibationWinForms/Form1._NonUI.cs

using ApplicationServices;
using AudibleUtilities;
using Dinah.Core.Threading;
using Dinah.Core.WindowsDesktop.Drawing;
using FileManager;
using LibationFileManager;
using LibationUiBase;
using System.Windows.Forms;

namespace LibationWinForms;

public partial class Form1
{
	private void Configure_NonUI()
	{
		AudibleApiStorage.LoadError += AudibleApiStorage_LoadError;

		// init default/placeholder cover art
		var format = System.Drawing.Imaging.ImageFormat.Jpeg;
		PictureStorage.SetDefaultImage(PictureSize._80x80, Properties.Resources.default_cover_80x80.ToBytes(format));
		PictureStorage.SetDefaultImage(PictureSize._300x300, Properties.Resources.default_cover_300x300.ToBytes(format));
		PictureStorage.SetDefaultImage(PictureSize._500x500, Properties.Resources.default_cover_500x500.ToBytes(format));
		PictureStorage.SetDefaultImage(PictureSize.Native, Properties.Resources.default_cover_500x500.ToBytes(format));

		BaseUtil.SetLoadImageDelegate(WinFormsUtil.TryLoadImageOrDefault);
		BaseUtil.SetIsDarkModeDelegate(() => Application.IsDarkModeEnabled);

		// wire-up event to automatically download after scan.
		// winforms only. this should NOT be allowed in cli
		updateCountsBw.RunWorkerCompleted += (_, e) => tryAutoDownloadAfterCounts(e);
	}

	private void tryAutoDownloadAfterCounts(System.ComponentModel.RunWorkerCompletedEventArgs e)
	{
		// Guard e.Cancelled/e.Error before reading e.Result: e.Result rethrows a faulted count,
		// which here (a RunWorkerCompleted handler) would become an unhandled exception.
		if (!Configuration.Instance.AutoDownloadEpisodes || e.Cancelled || e.Error is not null)
			return;

		if (e.Result is not LibraryCommands.LibraryStats libraryStats)
			return;

		if (libraryStats.PendingBooks + libraryStats.pdfsNotDownloaded <= 0)
			return;

		// RunWorkerCompleted has no SynchronizationContext; queue items require the UI thread.
		this.UIThreadAsync(() => _ = BackupAllBooksAsync(libraryStats.LibraryBooks, notifyIfNothingQueued: false));
	}

	private void AudibleApiStorage_LoadError(object? sender, AccountSettingsLoadErrorEventArgs e)
	{
		try
		{
			//Backup AccountSettings.json and create a new, empty file.
			var backupFile =
				FileUtility.SaferMoveToValidPath(
					e.SettingsFilePath,
					e.SettingsFilePath,
					Configuration.Instance.ReplacementCharacters,
					"bak");

			AudibleApiStorage.EnsureAccountsSettingsFileExists();
			e.Handled = true;

			showAccountSettingsRecoveredMessage(backupFile);
		}
		catch
		{
			showAccountSettingsUnrecoveredMessage();
		}

		void showAccountSettingsRecoveredMessage(LongPath backupFile)
		{
			var ex = e.GetException();
			var body = AccountSettingsDecryptFailure.TryFindInTree(ex, out _)
				? AccountSettingsDecryptFailure.GetRecoveredDialogBody(ex, backupFile.PathWithoutPrefix)
				: $"""
					Libation could not load your account settings, so it had created a new, empty account settings file.

					You will need to re-add you Audible account(s) before scanning or downloading.

					The old account settings file has been archived at '{backupFile.PathWithoutPrefix}'

					{ex}
					""";

			MessageBox.Show(
				this,
				body,
				AccountSettingsDecryptFailure.LoadErrorCaption,
				MessageBoxButtons.OK,
				MessageBoxIcon.Warning);
		}

		void showAccountSettingsUnrecoveredMessage()
		=> MessageBox.Show(this, $"""
			Libation could not load your account settings. The file may be corrupted, but Libation is unable to delete it.

			Please move or delete the account settings file '{e.SettingsFilePath}'

			{e.GetException().ToString()}
			""",
			"Error Loading Account Settings",
			MessageBoxButtons.OK,
			MessageBoxIcon.Error);
	}
}