namespace Htmx.ApiDemo.Templates;

public class Greeting : GreetingBase
{
    private byte[] _userData = [];
    public required string Username { init => _userData = value.ToUtf8Bytes(); }
    protected override void RenderUser(HtmxRenderContext context) => context.Writer.WriteUtf8(_userData);
}

[Handler]
[MapGet("/greet/{username}")]
public static partial class GetGreetingHandler
{
    public record Query(string Username);

    private static ValueTask HandleAsync(
        Query query,
        IHttpContextAccessor httpContextAccessor, 
        CancellationToken token)
    {
        var context = httpContextAccessor.HttpContext;
        if(context is null)
            throw new InvalidOperationException("HttpContext is not available.");

        var template = new Greeting { Username = query.Username };

        context.Response.ContentType = "text/html; charset=utf-8";
        context.Response.BodyWriter.WriteHtmx(template);

        return ValueTask.CompletedTask;
    }
}