using NewLife.Log;
using Xunit;

namespace XUnitTest.Log;

/// <summary>文本文件日志测试</summary>
public class TextFileLogTests : IDisposable
{
    private readonly String _logDir;

    public TextFileLogTests()
    {
        _logDir = Path.Combine(Path.GetTempPath(), "NewLife_TextFileLogTests_" + Guid.NewGuid().ToString("N")[..8]);
        Directory.CreateDirectory(_logDir);
    }

    public void Dispose()
    {
        try
        {
            if (Directory.Exists(_logDir))
                Directory.Delete(_logDir, true);
        }
        catch { }
    }

    [Fact(DisplayName = "Create创建日志实例")]
    public void CreateReturnsInstance()
    {
        var log = TextFileLog.Create(_logDir);
        Assert.NotNull(log);
        Assert.Equal(_logDir, log.LogPath);
    }

    [Fact(DisplayName = "默认FileFormat不为空")]
    public void DefaultFileFormat()
    {
        var log = TextFileLog.Create(_logDir);
        Assert.False(String.IsNullOrEmpty(log.FileFormat));
    }

    [Fact(DisplayName = "MaxBytes默认值")]
    public void MaxBytesDefault()
    {
        var log = new TextFileLog();
        Assert.True(log.MaxBytes >= 0);
    }

    [Fact(DisplayName = "Backups默认值")]
    public void BackupsDefault()
    {
        var log = new TextFileLog();
        Assert.True(log.Backups >= 0);
    }

    [Fact(DisplayName = "写日志到文件")]
    public void WriteLogToFile()
    {
        var log = TextFileLog.Create(_logDir);
        log.Info("TextFileLogTests: 测试写入消息");

        // 等待异步写入完成
        Thread.Sleep(6000);

        var files = Directory.GetFiles(_logDir, "*.log");
        Assert.True(files.Length > 0, "应生成日志文件");

        // 日志文件可能被TextFileLog持有锁，使用FileShare.ReadWrite读取
        using var fs = new FileStream(files[0], FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
        using var sr = new StreamReader(fs);
        var content = sr.ReadToEnd();
        Assert.Contains("测试写入消息", content);
    }

    [Fact(DisplayName = "CreateFile创建文件日志")]
    public void CreateFileReturnsInstance()
    {
        var filePath = Path.Combine(_logDir, "test.log");
        var log = TextFileLog.CreateFile(filePath);
        Assert.NotNull(log);
    }
}