namespace SpacebarDiscordDesktopLauncher;

public static class WindowsDiscordClientFinder
{
    public static string? FindDiscord()
    {
        Console.WriteLine($"Looking for installed Discord desktop instance...");

        var basePath = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
        foreach (var discordBranch in new String[] { "", "PTB", "Canary", "Development" })
        {
            if (Path.Exists(Path.Combine(basePath, "Discord" + discordBranch)))
                return Path.Combine(GetLatestAppVersion(Path.Combine(basePath, "Discord" + discordBranch)),
                    discordBranch + ".exe");
        }

        Console.WriteLine("Could not find Discord! Do you have the normal Discord client installed?");
        Console.ReadLine();
        return null;
    }

    private static string GetLatestAppVersion(string basePath)
    {
        var dirs = Directory.GetDirectories(basePath);
        var newestDir = "";
        var newestDirDate = DateTime.MinValue;
        foreach (var dir in dirs)
        {
            var di = new DirectoryInfo(dir);
            if (!di.Name.StartsWith("app", StringComparison.InvariantCultureIgnoreCase)) continue;
            if (di.CreationTimeUtc <= newestDirDate) continue;
            newestDirDate = di.CreationTimeUtc;
            newestDir = di.FullName;
        }

        return newestDir;
    }
}