LenovoLegionToolkit

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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.IO;
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using System.Runtime.CompilerServices;
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using System.Text;
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namespace LenovoLegionToolkit.Lib.Utils;
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public class Log
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{
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    private static Log? _instance;
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    public static Log Instance
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    {
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        get
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        {
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            _instance ??= new Log();
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            return _instance;
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        }
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    }
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    private readonly object _lock = new();
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    private readonly string _folderPath;
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    private readonly string _logPath;
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    public bool IsTraceEnabled { get; set; }
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    public string LogPath => _logPath;
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    private Log()
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    {
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        _folderPath = Path.Combine(Folders.AppData, "log");
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        Directory.CreateDirectory(_folderPath);
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        _logPath = Path.Combine(_folderPath, $"log_{DateTime.UtcNow:yyyy_MM_dd_HH_mm_ss}.txt");
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    }
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    public void ErrorReport(string header, Exception ex)
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    {
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        var errorReportPath = Path.Combine(_folderPath, $"error_{DateTime.UtcNow:yyyy_MM_dd_HH_mm_ss}.txt");
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        File.AppendAllLines(errorReportPath, new[] { header, Serialize(ex) });
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    }
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    public void Trace(FormattableString message,
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        Exception? ex = null,
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        [CallerFilePath] string? file = null,
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        [CallerLineNumber] int lineNumber = -1,
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        [CallerMemberName] string? caller = null)
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    {
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        if (!IsTraceEnabled)
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            return;
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        LogInternal(_logPath, message, ex, file, lineNumber, caller);
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    }
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    private void LogInternal(string path,
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        FormattableString message,
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        Exception? ex,
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        string? file,
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        int lineNumber,
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        string? caller)
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    {
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        lock (_lock)
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        {
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            var lines = new List<string>
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            {
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                $"[{DateTime.UtcNow:dd/MM/yyyy HH:mm:ss.fff}] [{Environment.CurrentManagedThreadId}] [{Path.GetFileName(file)}#{lineNumber}:{caller}] {message}"
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            };
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            if (ex is not null)
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                lines.Add(Serialize(ex));
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#if DEBUG
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            foreach (var line in lines)
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                Debug.WriteLine(line);
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#endif
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            File.AppendAllLines(path, lines);
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        }
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    }
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    private static string Serialize(Exception ex) => new StringBuilder()
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        .AppendLine("=== Exception ===")
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        .AppendLine(ex.ToString())
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        .AppendLine()
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        .AppendLine("=== Exception demystified ===")
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        .AppendLine(ex.ToStringDemystified())
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        .ToString();
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}
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