using OrpaonVision.Core.Abstractions;
using System.IO;
using System.Text;

namespace OrpaonVision.ConfigApp.Infrastructure.Logging;

/// <summary>
/// 基于文本文件的应用日志实现。
/// </summary>
public sealed class FileAppLogger : IAppLogger
{
    private static readonly object SyncRoot = new();

    private readonly string _logDirectory;

    /// <summary>
    /// 初始化日志记录器。
    /// </summary>
    public FileAppLogger()
    {
        _logDirectory = Path.Combine(AppContext.BaseDirectory, "logs");
    }

    /// <inheritdoc />
    public void LogInformation(string message, string? traceId = null)
    {
        WriteLine("INFO", message, traceId);
    }

    /// <inheritdoc />
    public void LogWarning(string message, string? traceId = null)
    {
        WriteLine("WARN", message, traceId);
    }

    /// <inheritdoc />
    public void LogError(string message, Exception? exception = null, string? traceId = null)
    {
        var fullMessage = exception is null
            ? message
            : $"{message}{Environment.NewLine}{exception}";
        WriteLine("ERROR", fullMessage, traceId);
    }

    private void WriteLine(string level, string message, string? traceId)
    {
        Directory.CreateDirectory(_logDirectory);

        var safeMessage = message.Replace(Environment.NewLine, " | ");
        var traceSegment = string.IsNullOrWhiteSpace(traceId)
            ? string.Empty
            : $"[TraceId:{traceId}] ";
        var line = $"{DateTimeOffset.Now:yyyy-MM-dd HH:mm:ss.fff zzz} [{level}] {traceSegment}{safeMessage}";

        var filePath = Path.Combine(_logDirectory, $"configapp-{DateTime.Now:yyyyMMdd}.log");
        lock (SyncRoot)
        {
            File.AppendAllText(filePath, line + Environment.NewLine, Encoding.UTF8);
        }
    }
}