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

namespace Elternbeirat.Web.Features.Faqs;

public partial class FaqList
{
    [LoggerMessage(Level = LogLevel.Warning, Message = "Could not load FAQs from PocketBase.")]
    private static partial void LogLoadFailed(ILogger logger, Exception exception);

    // German heading per topic. Unknown topics fall back to the raw key so a new
    // topic in PocketBase still shows up rather than being silently dropped.
    private static readonly Dictionary<string, string> TopicLabels =
        new(StringComparer.Ordinal)
        {
            ["mensa"] = "Mensa und Mittagessen",
            ["schliessfach"] = "Schließfächer",
            ["elterneuro"] = "Eltern-Euro",
            ["elternarbeit"] = "Elternarbeit und Mitmachen",
        };

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

    [Inject]
    private ILogger<FaqList> Logger { get; set; } = default!;

    private IReadOnlyList<IGrouping<string, Faq>> _groups = [];

    protected override async Task OnInitializedAsync()
    {
        try
        {
            var faqs = await PocketBase.GetFaqsAsync();
            _groups = [.. faqs.GroupBy(faq => faq.Topic)];
        }
        catch (HttpRequestException ex)
        {
            // Source unreachable -> show an empty page instead of a 500. The page
            // stays up; the "keine Fragen" note is rendered.
            LogLoadFailed(Logger, ex);
        }
    }

    private static string TopicLabel(string topic) =>
        TopicLabels.TryGetValue(topic, out var label) ? label : topic;
}