using Elternbeirat.PocketBase;

namespace Elternbeirat.Web.Tests;

/// <summary>
/// Tests the <see cref="PocketBaseClient"/> against a throwaway PocketBase container
/// with a known seed (see <see cref="PocketBaseFixture"/>). Because the data is fixed,
/// the tests assert on exact values, and they need no network to the live instance.
/// </summary>
[Collection(PocketBaseTestGroup.Name)]
public sealed class PocketBaseClientTests(PocketBaseFixture pocketBase)
{
    [Fact]
    public async Task Events_load_sorted_by_start()
    {
        var client = pocketBase.CreateClient();

        var events = await client.GetEventsAsync();

        // Two seeded events, earliest start first.
        events.Select(e => e.Title).ShouldBe(["Elternbeiratssitzung", "Herbstbasar"]);
        events.ShouldAllBe(e => e.Public);
    }

    [Fact]
    public async Task Event_utc_is_converted_to_berlin_wall_clock()
    {
        var client = pocketBase.CreateClient();

        var events = await client.GetEventsAsync();

        // The meeting is seeded as 17:30Z. October is summer time (UTC+2), so the
        // converter turns it into 19:30 Berlin wall-clock -- the time an editor
        // entered in the admin form.
        var meeting = events.FirstOrDefault(e =>
            e.Title.Contains("Elternbeiratssitzung", StringComparison.Ordinal));
        meeting.ShouldNotBeNull();
        meeting.Start.Hour.ShouldBe(19);
        meeting.Start.Minute.ShouldBe(30);
        meeting.Start.Kind.ShouldBe(DateTimeKind.Unspecified);
    }

    [Fact]
    public async Task Event_without_end_maps_to_null()
    {
        var client = pocketBase.CreateClient();

        var events = await client.GetEventsAsync();

        var meeting = events.Single(e => e.Title == "Elternbeiratssitzung");
        var basar = events.Single(e => e.Title == "Herbstbasar");
        meeting.End.ShouldBeNull();      // no end seeded
        basar.End.ShouldNotBeNull();     // end seeded
    }

    [Fact]
    public async Task Posts_load_newest_first()
    {
        var client = pocketBase.CreateClient();

        var posts = await client.GetPostsAsync();

        // Sorted by -date: March before January.
        posts.Select(p => p.Title).ShouldBe(["Neuer Vorstand", "Neue Sporthalle"]);
    }

    [Fact]
    public async Task Post_date_is_the_berlin_calendar_day()
    {
        var client = pocketBase.CreateClient();

        var posts = await client.GetPostsAsync();

        // The post is seeded as 2026-03-01 23:30Z, which is 2 March 00:30 in Berlin.
        // The date is the Berlin day the editor picked (2 March), not the raw UTC
        // day (1 March) -- the time zone is applied before the day is taken.
        var post = posts.Single(p => p.Title == "Neuer Vorstand");
        post.Date.ShouldBe(new DateOnly(2026, 3, 2));
    }

    [Fact]
    public async Task Pages_exclude_non_public_records()
    {
        var client = pocketBase.CreateClient();

        var pages = await client.GetPagesAsync();

        // The draft (public=false) must be filtered out, the public ones present.
        pages.ShouldNotContain(p => p.Slug == "draft");
        pages.ShouldContain(p => p.Slug == "home");
        pages.ShouldContain(p => p.Slug == "contact");
    }

    [Fact]
    public async Task Page_embed_is_read_as_list()
    {
        var client = pocketBase.CreateClient();

        var pages = await client.GetPagesAsync();

        var home = pages.Single(p => p.Slug == "home");
        home.Embed.ShouldBe(["posts", "events"], ignoreOrder: true);
        // Home sits in the header like every other page (location is required); it
        // is the single source of the home nav link.
        home.Location.ShouldBe("header");
    }

    [Fact]
    public async Task Faqs_load_from_instance()
    {
        var client = pocketBase.CreateClient();

        var faqs = await client.GetFaqsAsync();

        faqs.Select(f => f.Topic).ShouldBe(["mensa", "schliessfach"], ignoreOrder: true);
        faqs.ShouldAllBe(f => !string.IsNullOrWhiteSpace(f.Question));
    }
}