using System;
using System.IO;
using GeoVLog.Core.Hdf5;
using Xunit;

namespace GeoVLog.Tests.Helpers;

public class UniquePathTests
{
    [Fact]
    [Trait("Category", "Core")]
    public void ReturnsSameBaseWhenUnused()
    {
        var dir = CreateTempDir();
        try
        {
            var basePath = Path.Combine(dir, "20250521_0915");
            var unique = H5LogQueueWorker.GetUniquePath(basePath);
            Assert.Equal(basePath, unique);
        }
        finally
        {
            Directory.Delete(dir, true);
        }
    }

    [Fact]
    [Trait("Category", "Core")]
    public void AddsSuffixWhenFilesExist()
    {
        var dir = CreateTempDir();
        try
        {
            var basePath = Path.Combine(dir, "20250521_0915");
            File.WriteAllText(basePath + ".h5", string.Empty);
            var unique = H5LogQueueWorker.GetUniquePath(basePath);
            Assert.Equal(basePath + "(1)", unique);
        }
        finally
        {
            Directory.Delete(dir, true);
        }
    }

    [Fact]
    [Trait("Category", "Core")]
    public void IncrementsSuffixUntilFree()
    {
        var dir = CreateTempDir();
        try
        {
            var basePath = Path.Combine(dir, "20250521_0915");
            File.WriteAllText(basePath + ".h5", string.Empty);
            File.WriteAllText(basePath + "(1).h5.enc", string.Empty);
            var unique = H5LogQueueWorker.GetUniquePath(basePath);
            Assert.Equal(basePath + "(2)", unique);
        }
        finally
        {
            Directory.Delete(dir, true);
        }
    }

    private static string CreateTempDir()
    {
        var path = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString("N"));
        Directory.CreateDirectory(path);
        return path;
    }
}