using System.Diagnostics;
using Jellyfin.Plugin.Multilang.Data;
using Jellyfin.Plugin.Multilang.Services.Refresh;
using Xunit.Abstractions;

namespace Jellyfin.Plugin.Multilang.Tests;

public sealed class TranslationStoreBatchTests(ITestOutputHelper output)
{
    [Fact]
    public void BatchFactsLookupMatchesIndividualReads()
    {
        var root = TestPaths.CreateRoot();
        try
        {
            var store = new TranslationStore(new TestApplicationPaths(root));
            var ids = Enumerable.Range(0, 100).Select(index => index.ToString()).ToArray();
            foreach (var id in ids)
                store.SaveMetadata(new(id, id, "movie", RefreshWorkClass.Movies, 0, 0, null, "Movie"), "fi",
                    new("Title", "Overview", "Tagline", "Title", "fi", [], [], [], []), new("scope", 1, true), true);
            var timer = Stopwatch.StartNew();
            var individual = ids.Select(id => store.GetFacts(id)!).ToArray();
            var separateMs = timer.Elapsed.TotalMilliseconds;
            timer.Restart();
            var batch = store.GetFactsForItems(ids.Concat(ids));
            var batchMs = timer.Elapsed.TotalMilliseconds;
            Assert.Equal(individual, ids.Select(id => batch[id]));
            Assert.Equal(ids.Length, batch.Count);
            output.WriteLine($"100 individual fact reads: {separateMs:F2} ms; one batched read: {batchMs:F2} ms. Timing is diagnostic, not a pass condition.");
        }
        finally { TestPaths.DeleteRoot(root); }
    }
}