using Elternbeirat.Contracts;
using Elternbeirat.PocketBase;
using Microsoft.AspNetCore.Components;

namespace Elternbeirat.Web.Features.Embeds;

public partial class FaqsEmbed
{
    // Number of questions shown in the teaser; the full hub is one link away.
    private const int TeaserCount = 3;

    [LoggerMessage(
        Level = LogLevel.Warning,
        Message = "Could not load FAQs for an embed from PocketBase; the teaser is omitted.")]
    private static partial void LogSourceUnavailable(
        ILogger logger,
        Exception exception);

    [Inject]
    private PocketBaseClient PocketBase { get; set; } = null!;

    [Inject]
    private ILogger<FaqsEmbed> Logger { get; set; } = null!;

    [CascadingParameter]
    private HttpContext? HttpContext { get; set; }

    private IReadOnlyList<Faq> _faqs = [];

    protected override async Task OnInitializedAsync()
    {
        try
        {
            // GetFaqsAsync is ordered by topic, then question, so the first entries
            // the teaser takes are stable across requests.
            var faqs = await PocketBase.GetFaqsAsync(HttpContext?.RequestAborted ?? CancellationToken.None);
            _faqs = [.. faqs.Take(TeaserCount)];
        }
        catch (PocketBaseUnavailableException exception)
        {
            // Only part of the page fails: omit the teaser, keep the page (and its
            // 200) intact. A missing teaser is degraded, not broken.
            LogSourceUnavailable(Logger, exception);
        }
    }
}