namespace QRScript.Console;

[Command("build", Description = "Build Glyph program.")]
public class BuildCommand : ICommand
{
    [CommandParameter(0, Name = "file", Description = "Path to the Glyph source file.")]
    public string FilePath { get; set; }

    [CommandOption("dry", 'd', Description = "Dry run.")]
    public bool DryRun { get; set; }

    [CommandOption("sample", 's', Description = "Generate ASCII sample.")]
    public bool Sample { get; set; }

    [CommandOption("byte", 'b', Description = "Convert source to byte code.")]
    public bool ByteCode { get; set; }

    [CommandOption("verbose", 'v', Description = "Enable verbose output.")]
    public bool Verbose { get; set; }

    public async ValueTask ExecuteAsync(IConsole console)
    {

        var fileInfo = new FileInfo(FilePath);
        var file = fileInfo.FullName;
        var dir = Path.GetDirectoryName(FilePath);
        var path = Path.Combine(dir, file);

        if (!File.Exists(FilePath))
        {
            await console.Error.WriteLineAsync($"Error: File not found: {file}");
            return;
        }
;
        var lines = await File.ReadAllLinesAsync(path);
        var source = lines.JoinLines();

        if (ByteCode)
            source = source.ToBase64();

        if (Verbose)
        {
            await console.Output.WriteLineAsync($"Compiling: {path}");
        }

        if (source.ExceedsLengthLimit(1259))
            await console.Output.WriteAsync($"Warning: source code exceeds {1259:n} characters.");


        var qrGenerator = new QRCodeGenerator();
        var qrCodeData = qrGenerator.CreateQrCode(source, QRCodeGenerator.ECCLevel.M);
        var qrCode = new SvgQRCode(qrCodeData);
        var asciiCode = new AsciiQRCode(qrCodeData);
        var qrCodeAsASCII = asciiCode.GetGraphicSmall();
        var qrCodeAsSvg = qrCode.GetGraphic(57);

        if (string.IsNullOrEmpty(qrCodeAsSvg)
            || string.IsNullOrEmpty(qrCodeAsASCII))
        {
            await console.Output.WriteLineAsync("There was an issue in the rendering process.");
            return;
        }

        if (Sample)
            await console.Output.WriteLineAsync(qrCodeAsASCII);

        if (DryRun)
            return;

        await console.Output.WriteLineAsync("Rendered successfully.");

        var srcName = Path.GetFileNameWithoutExtension(fileInfo.Name);
        File.WriteAllText(Path.Combine(dir, $"{srcName}.svg"), qrCodeAsSvg);
    }
}