using FluentAssertions;
using FreeCode.Tools;
using FreeCode.Tests.Unit.Helpers;
using Xunit;

namespace FreeCode.Tests.Unit.Tools;

public sealed class GrepToolTests : IDisposable
{
    private readonly string _tempDirectory = Path.Combine(Path.GetTempPath(), "free-code-tests", Guid.NewGuid().ToString("N"));
    private readonly GrepTool _sut = new();

    public GrepToolTests()
    {
        Directory.CreateDirectory(_tempDirectory);
        File.WriteAllText(Path.Combine(_tempDirectory, "alpha.txt"), "hello\nworld\nhello again");
        File.WriteAllText(Path.Combine(_tempDirectory, "beta.txt"), "nothing here");
    }

    [Fact]
    public async Task ExecuteAsync_FindsMatchingLines()
    {
        var result = await _sut.ExecuteAsync(new GrepToolInput("hello", _tempDirectory), TestHelper.CreateContext());

        result.IsError.Should().BeFalse();
        result.Data.TotalMatches.Should().Be(2);
        result.Data.Matches.Should().OnlyContain(match => match.Line.Contains("hello", StringComparison.Ordinal));
    }

    [Fact]
    public async Task ExecuteAsync_WithNoMatches_ReturnsEmpty()
    {
        var result = await _sut.ExecuteAsync(new GrepToolInput("absent", _tempDirectory), TestHelper.CreateContext());

        result.IsError.Should().BeFalse();
        result.Data.TotalMatches.Should().Be(0);
        result.Data.Matches.Should().BeEmpty();
    }

    public void Dispose()
    {
        if (Directory.Exists(_tempDirectory))
        {
            Directory.Delete(_tempDirectory, recursive: true);
        }
    }
}