using System.IO;

namespace WindowsGotify.Services;

public sealed class Logger
{
    private readonly object _lock = new();
    private readonly string _logFile;

    public Logger()
    {
        var dir = Path.Combine(
            Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
            "WindowsGotify",
            "logs");

        Directory.CreateDirectory(dir);
        _logFile = Path.Combine(dir, "app.log");
    }

    public void Info(string message) => Write("INFO", message);
    public void Warn(string message) => Write("WARN", message);
    public void Error(string message, Exception? ex = null)
        => Write("ERROR", ex is null ? message : $"{message} {ex}");

    private void Write(string level, string message)
    {
        var line = $"{DateTime.Now:yyyy-MM-dd HH:mm:ss.fff} [{level}] {message}";

        lock (_lock)
        {
            try
            {
                File.AppendAllText(_logFile, line + Environment.NewLine);
            }
            catch
            {
                // 日志写不进时静默,不影响主流程
            }
        }
    }
}