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

namespace FreeCode.Tests.Unit.Tools;

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

    public FileWriteToolTests()
    {
        Directory.CreateDirectory(_tempDirectory);
    }

    [Fact]
    public async Task ExecuteAsync_CreatesNewFile()
    {
        var path = Path.Combine(_tempDirectory, "nested", "sample.txt");

        var result = await _sut.ExecuteAsync(new FileWriteToolInput(path, "created"), TestHelper.CreateContext());

        result.IsError.Should().BeFalse();
        File.Exists(path).Should().BeTrue();
        (await File.ReadAllTextAsync(path)).Should().Be("created");
    }

    [Fact]
    public async Task ExecuteAsync_OverwritesExistingFile()
    {
        var path = Path.Combine(_tempDirectory, "sample.txt");
        await File.WriteAllTextAsync(path, "old");

        await _sut.ExecuteAsync(new FileWriteToolInput(path, "new"), TestHelper.CreateContext());

        (await File.ReadAllTextAsync(path)).Should().Be("new");
    }

    [Fact]
    public async Task ValidateInputAsync_WithNullPathLikeValue_IsInvalid()
    {
        var result = await _sut.ValidateInputAsync(new FileWriteToolInput(string.Empty, "content"));

        result.IsValid.Should().BeFalse();
        result.Errors.Should().Contain("FilePath is required.");
    }

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