using XFEExtension.NetCore.XFEConsole.Terminal;
using XFEConsoleApi = XFEExtension.NetCore.XFEConsole.XFEConsole;

namespace XFESystem.ConsoleDemo;

/// <summary>
/// Shared application body for hosted and statically compiled guest tests.
/// The ANSI path uses the real XFEConsole NuGet package without probing host APIs.
/// </summary>
public static class ConsoleDemoScenario
{
    public const string SuccessMarker = "XFE_CSHARP_CONSOLE_DEMO_OK";

    public static void Run(TextWriter output)
    {
        ArgumentNullException.ThrowIfNull(output);
        Line(output, "XFESystem C# Console Demo");
        Line(output, new XFETerminalStyle
        {
            Foreground = XFETerminalColor.FromRgb(117, 201, 245)
        }.Apply("RGB: #75C9F5"));
        Line(output, new XFETerminalStyle
        {
            Foreground = XFETerminalColor.FromIndex(202),
            Background = XFETerminalColor.FromIndex(236)
        }.Apply("Indexed: 202 / 236"));
        Line(output, new XFETerminalStyle
        {
            Foreground = XFETerminalColor.FromConsoleColor(ConsoleColor.Blue)
        }.Apply("ConsoleColor ANSI: Blue"));
        Line(output, new XFETerminalStyle
        {
            Foreground = XFETerminalColor.FromRgb(172, 153, 234),
            Bold = true,
            Underline = true
        }.Apply("Style: Bold + Underline"));
        Line(output, "Reset: Theme default");
        Line(output, "Edit: abc\bD\rEdit: OK\u001b[K");
        Line(output, "Cursor: xy\u001b[1D!");
        Line(output, "Unicode: 中文 g y");
        Line(output, SuccessMarker);
    }

    /// <summary>Exercise runtime Console PAL calls, separately from ANSI parsing.</summary>
    public static void RunSystemConsoleColors()
    {
        var foreground = global::System.Console.ForegroundColor;
        var background = global::System.Console.BackgroundColor;
        try
        {
            global::System.Console.ForegroundColor = ConsoleColor.Cyan;
            global::System.Console.BackgroundColor = ConsoleColor.DarkBlue;
            global::System.Console.WriteLine("Console.ForegroundColor: Cyan / DarkBlue");
            global::System.Console.ResetColor();
        }
        catch
        {
            Restore();
            throw;
        }
        Restore();

        void Restore()
        {
            global::System.Console.ForegroundColor = foreground;
            global::System.Console.BackgroundColor = background;
        }
    }

    /// <summary>
    /// Direct XFEConsole API test. This path retains the package's remote-console
    /// dependencies during AOT; a bare-metal port must supply their runtime imports.
    /// No remote connection is opened by this method.
    /// </summary>
    public static void RunXfeConsoleApi(TextWriter output)
    {
        ArgumentNullException.ThrowIfNull(output);
        var oldWriter = XFEConsoleApi.CurrentConsoleTextWriter;
        var oldDebug = XFEConsoleApi.ShowInDebug;
        var oldLocal = XFEConsoleApi.ShowInLocalConsole;
        var oldLog = XFEConsoleApi.EnableLog;
        try
        {
            XFEConsoleApi.CurrentConsoleTextWriter = new(output);
            XFEConsoleApi.ShowInDebug = false;
            XFEConsoleApi.ShowInLocalConsole = true;
            XFEConsoleApi.EnableLog = false;
            XFEConsoleApi.WriteLine("XFEConsole API: Real NuGet 2.6.0");
        }
        catch
        {
            Restore();
            throw;
        }
        Restore();

        void Restore()
        {
            XFEConsoleApi.CurrentConsoleTextWriter = oldWriter;
            XFEConsoleApi.ShowInDebug = oldDebug;
            XFEConsoleApi.ShowInLocalConsole = oldLocal;
            XFEConsoleApi.EnableLog = oldLog;
        }
    }

    private static void Line(TextWriter output, string text)
    {
        output.Write(text);
        output.Write("\r\n");
    }
}