using System.Text;
using FluentAssertions;
using Xunit;

namespace LedgerReplayHarness.Tests;

public class HarnessFixtureReaderTests
{
    [Fact]
    public async Task ReadDraftsAsync_ThrowsWithFixtureContextOnInvalidDate()
    {
        var line = "{" +
            "\"chain_id\":\"11111111-1111-1111-1111-111111111111\"," +
            "\"sequence_no\":1," +
            "\"event_id\":\"22222222-2222-2222-2222-222222222222\"," +
            "\"event_type\":\"test\"," +
            "\"policy_version\":\"v1\"," +
            "\"finding_id\":\"f1\"," +
            "\"artifact_id\":\"a1\"," +
            "\"actor_id\":\"u1\"," +
            "\"actor_type\":\"user\"," +
            "\"occurred_at\":\"not-a-date\"," +
            "\"payload\":{}" +
            "}";

        var tempPath = Path.GetTempFileName();
        await File.WriteAllTextAsync(tempPath, line, Encoding.UTF8, TestContext.Current.CancellationToken);
        var fileInfo = new FileInfo(tempPath);

        try
        {
            var action = async () =>
            {
                await foreach (var _ in HarnessFixtureReader.ReadDraftsAsync(fileInfo, "tenant-a", TimeProvider.System, TestContext.Current.CancellationToken))
                {
                }
            };

            var ex = await Assert.ThrowsAsync<HarnessFixtureException>(action);
            ex.Message.Should().Contain("occurred_at invalid");
            ex.Message.Should().Contain(Path.GetFileName(tempPath));
            ex.LineNumber.Should().Be(1);
        }
        finally
        {
            if (File.Exists(tempPath))
            {
                File.Delete(tempPath);
            }
        }
    }
}