using Omika.Diagnostics.Queries;
using Omika.Diagnostics.Tests.Fakes;

namespace Omika.Diagnostics.Tests;

/// <summary>§56 — Pagination : page size borné, offset calculé, tri timestamp, jamais de requête non bornée.</summary>
public class DiagnosticPaginationTests
{
    [Fact]
    public void Query_ClampsPageSizeAndPage()
    {
        var tooLarge = new DiagnosticEventQuery { PageSize = 100_000, Page = 0 };
        Assert.Equal(DiagnosticPaging.MaxPageSize, tooLarge.PageSize);
        Assert.Equal(1, tooLarge.Page);
        Assert.Equal(0, tooLarge.Offset);

        var tooSmall = new DiagnosticEventQuery { PageSize = 0 };
        Assert.Equal(1, tooSmall.PageSize);

        var page3 = new DiagnosticEventQuery { Page = 3, PageSize = 50 };
        Assert.Equal(100, page3.Offset);
    }

    [Fact]
    public async Task Repository_AppliesBoundedPagination()
    {
        var repository = new FakeDiagnosticEventRepository();
        DateTimeOffset baseTime = new(2025, 1, 1, 0, 0, 0, TimeSpan.Zero);

        for (int i = 0; i < 10; i++)
        {
            await repository.InsertBatchAsync(new[]
            {
                DiagnosticTestData.Event(Guid.NewGuid(), "E" + i, baseTime.AddSeconds(i))
            });
        }

        var page = await repository.QueryAsync(new DiagnosticEventQuery { Page = 2, PageSize = 3 });

        Assert.Equal(10, page.TotalCount);
        Assert.Equal(4, page.TotalPages);
        Assert.Equal(3, page.Items.Count);
    }
}