using Immediate.Apis.Shared;
using Immediate.Handlers.Shared;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;

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 class Query
    {
        [FromRoute] public string  Username { get; set; } = default!;
        [FromRoute] public string? Count    { get; set; }
        [FromRoute] public string? Id       { get; set; }
    }

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

        var count = int.TryParse(query.Count, out var parsedCount) ? parsedCount + 1 : 0;
        var greetingId = Guid.TryParse(query.Id, out var parsedId) ? parsedId : Guid.NewGuid();
        var template = new Greeting { Username = query.Username, Count = count, GreetingId = greetingId };
        return ValueTask.FromResult<IResult>(context.WriteHtmxBody(template));
    }
}