namespace OmniNX.DesktopInstaller.Services;

public sealed class BackupService
{
    private const string TempBackup = @"temp_backup";
    private const string DbiConfig = @"switch\DBI\dbi.config";
    private const string ProdKeys = @"switch\prod.keys";
    private const string CyberFoilDir = @"switch\CyberFoil";
    private const string CheckpointDir = @"switch\Checkpoint";

    private const string HorizonOcConfig = @"config\horizon-oc\config.ini";
    private const string HorizonOcBackupDir = @".omninx_oc_update";

    public void BackupUserData(string driveRoot, IProgress<string>? progress = null)
    {
        var backupRoot = PathUtils.ToDrivePath(driveRoot, TempBackup);
        PathUtils.EnsureDirectory(backupRoot);
        progress?.Report("Backing up CyberFoil, Checkpoint, DBI (dbi.config), prod.keys...");

        CopyIfExists(PathUtils.ToDrivePath(driveRoot, DbiConfig),
            Path.Combine(backupRoot, "dbi.config"));

        CopyIfExists(PathUtils.ToDrivePath(driveRoot, ProdKeys),
            Path.Combine(backupRoot, "prod.keys"));

        var cyberfoil = PathUtils.ToDrivePath(driveRoot, CyberFoilDir);
        if (Directory.Exists(cyberfoil))
        {
            var dst = Path.Combine(backupRoot, "CyberFoil");
            PathUtils.EnsureDirectory(dst);
            CopyIfExists(Path.Combine(cyberfoil, "cyberfoil.nro"), Path.Combine(dst, "cyberfoil.nro"));
            CopyIfExists(Path.Combine(cyberfoil, "config.json"), Path.Combine(dst, "config.json"));
            var remotes = Path.Combine(cyberfoil, "remotes");
            if (Directory.Exists(remotes))
                PathUtils.CopyDirectory(remotes, Path.Combine(dst, "remotes"));
        }

        var checkpoint = PathUtils.ToDrivePath(driveRoot, CheckpointDir);
        if (Directory.Exists(checkpoint))
            PathUtils.CopyDirectory(checkpoint, Path.Combine(backupRoot, "Checkpoint"));
    }

    public void RestoreUserData(string driveRoot, IProgress<string>? progress = null)
    {
        var backupRoot = PathUtils.ToDrivePath(driveRoot, TempBackup);
        if (!Directory.Exists(backupRoot))
            return;

        progress?.Report("Restoring CyberFoil, Checkpoint, DBI (dbi.config), prod.keys...");
        PathUtils.EnsureDirectory(PathUtils.ToDrivePath(driveRoot, @"switch"));

        CopyIfExists(Path.Combine(backupRoot, "dbi.config"),
            PathUtils.ToDrivePath(driveRoot, DbiConfig));

        CopyIfExists(Path.Combine(backupRoot, "prod.keys"),
            PathUtils.ToDrivePath(driveRoot, ProdKeys));

        var cyberBackup = Path.Combine(backupRoot, "CyberFoil");
        if (Directory.Exists(cyberBackup))
        {
            var dst = PathUtils.ToDrivePath(driveRoot, CyberFoilDir);
            PathUtils.EnsureDirectory(dst);
            CopyIfExists(Path.Combine(cyberBackup, "cyberfoil.nro"), Path.Combine(dst, "cyberfoil.nro"));
            CopyIfExists(Path.Combine(cyberBackup, "config.json"), Path.Combine(dst, "config.json"));
            var remotes = Path.Combine(cyberBackup, "remotes");
            if (Directory.Exists(remotes))
                PathUtils.CopyDirectory(remotes, Path.Combine(dst, "remotes"));
        }

        var checkpointBackup = Path.Combine(backupRoot, "Checkpoint");
        if (Directory.Exists(checkpointBackup))
            PathUtils.CopyDirectory(checkpointBackup, PathUtils.ToDrivePath(driveRoot, @"switch"));
    }

    public void CleanupBackup(string driveRoot)
    {
        var backupRoot = PathUtils.ToDrivePath(driveRoot, TempBackup);
        if (Directory.Exists(backupRoot))
            PathUtils.DeletePath(backupRoot);
    }

    public void BackupHorizonOcConfig(string driveRoot, IProgress<string>? progress = null)
    {
        var src = PathUtils.ToDrivePath(driveRoot, HorizonOcConfig);
        if (!File.Exists(src))
            return;

        progress?.Report("HorizonOC: backing up config.ini...");
        var dstDir = PathUtils.ToDrivePath(driveRoot, HorizonOcBackupDir);
        PathUtils.EnsureDirectory(dstDir);
        PathUtils.CopyFile(src, Path.Combine(dstDir, "config.ini"));
    }

    public void RestoreHorizonOcConfig(string driveRoot, IProgress<string>? progress = null)
    {
        var src = Path.Combine(PathUtils.ToDrivePath(driveRoot, HorizonOcBackupDir), "config.ini");
        if (!File.Exists(src))
            return;

        progress?.Report("HorizonOC: restoring config.ini...");
        PathUtils.EnsureDirectory(PathUtils.ToDrivePath(driveRoot, @"config\horizon-oc"));
        PathUtils.CopyFile(src, PathUtils.ToDrivePath(driveRoot, HorizonOcConfig));
    }

    public void CleanupHorizonOcBackup(string driveRoot)
    {
        var dir = PathUtils.ToDrivePath(driveRoot, HorizonOcBackupDir);
        if (Directory.Exists(dir))
            PathUtils.DeletePath(dir);
    }

    private static void CopyIfExists(string src, string dst)
    {
        if (!File.Exists(src))
            return;
        PathUtils.CopyFile(src, dst);
    }
}