using FluentAssertions;
using Microsoft.Extensions.Logging.Abstractions;
using Microsoft.Extensions.Options;
using PiiRedaction.Core.Configuration;
using PiiRedaction.Core.Models;
using PiiRedaction.Infrastructure.Onnx;

namespace PiiRedaction.Infrastructure.Tests.Onnx;

[TestFixture]
public sealed class OnnxNerModelRunnerTests
{
    [Test]
    public void Constructor_MissingModel_IsModelUnavailable()
    {
        var path = Path.Combine(Path.GetTempPath(), $"missing-ner-{Guid.NewGuid():N}.onnx");
        using var runner = CreateRunner(path);

        runner.IsModelAvailable.Should().BeFalse();
    }

    [Test]
    public void PredictEntities_WhenModelUnavailable_ReturnsEmpty()
    {
        var path = Path.Combine(Path.GetTempPath(), $"missing-ner-{Guid.NewGuid():N}.onnx");
        using var runner = CreateRunner(path);

        runner.PredictEntities("Customer Ravi Kumar").Should().BeEmpty();
    }

    [Test]
    public void Constructor_InvalidModelFile_IsModelUnavailable()
    {
        var path = Path.Combine(Path.GetTempPath(), $"invalid-ner-{Guid.NewGuid():N}.onnx");
        File.WriteAllText(path, "not-a-valid-onnx-model");

        try
        {
            using var runner = CreateRunner(path);
            runner.IsModelAvailable.Should().BeFalse();
        }
        finally
        {
            File.Delete(path);
        }
    }

    private static OnnxNerModelRunner CreateRunner(string modelPath)
    {
        var options = Options.Create(new PiiRedactionOptions { OnnxModelPath = modelPath });
        return new OnnxNerModelRunner(options, NullLogger<OnnxNerModelRunner>.Instance);
    }
}