using Immediate.Apis.Shared;
using Immediate.Handlers.Shared;

namespace Htmx.ApiDemo.Templates;

public sealed class Greeting : GreetingBase
{
    private byte[] _userData = [];
    private byte[] _countData = [];
    private byte[] _greetingIdData = [];
    public required string Username { init => _userData = value.ToUtf8Bytes(); }
    public required int Count { init => _countData = $"{value}".ToUtf8Bytes(); }
    public required Guid GreetingId { init => _greetingIdData = $"{value}".ToUtf8Bytes(); }

    protected override void RenderCount(HtmxRenderContext context) => context.Writer.WriteUtf8(_countData);
    protected override void RenderGreetingId(HtmxRenderContext context) => context.Writer.WriteUtf8(_greetingIdData);
    protected override void RenderUser(HtmxRenderContext context) => context.Writer.WriteUtf8(_userData);
}

[Handler]
[MapGet("/greet/{username}/{count?}/{id?}")]
public static partial class GetGreetingHandler
{
    public record Query(string Username, int? Count, Guid? Id);

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

        var template = new Greeting { Username = query.Username, Count = query.Count + 1 ?? 0, GreetingId = query.Id ?? Guid.NewGuid() };
        context.WriteHtmxBody(template);
        return ValueTask.CompletedTask;
    }
}