import 'package:flutter/foundation.dart';
import 'package:logger/logger.dart';

import '../api/api_config.dart';

/// 统一应用日志，提升可读性：时间戳、级别、标签、格式化输出。
///
/// [Logger] 默认 [DevelopmentFilter] 依赖 `assert`，在 release/profile 下会屏蔽**全部**日志。
/// Release 全量日志：`flutter run --release --dart-define=APP_LOG_LEVEL=trace`（见 [ApiConfig.debugLogs]）。
/// 此时使用 [ProductionFilter]，debug/info 可见。
///
/// 使用示例:
///   final _log = AppLogger('GenerateVideo');
///   _log.d('task: $task');
///   _log.e('Generate failed', e, st);
class AppLogger {
  AppLogger([this.tag = 'App']);

  final String tag;

  static Logger? _logger;

  static Logger get _instance {
    _logger ??= Logger(
      filter: (!kDebugMode && ApiConfig.debugLogs)
          ? ProductionFilter()
          : DevelopmentFilter(),
      printer: PrettyPrinter(
        methodCount: 0,
        errorMethodCount: 6,
        lineLength: 80,
        colors: true,
        printEmojis: true,
        dateTimeFormat: DateTimeFormat.onlyTimeAndSinceStart,
      ),
      level: (kDebugMode || ApiConfig.debugLogs) ? Level.trace : Level.warning,
    );
    return _logger!;
  }

  String _msg(Object? message) => '[$tag] $message';

  void d(Object? message) => _instance.d(_msg(message));
  void i(Object? message) => _instance.i(_msg(message));
  void w(Object? message) => _instance.w(_msg(message));
  void e(Object? message, [Object? error, StackTrace? stackTrace]) =>
      _instance.e(_msg(message), error: error, stackTrace: stackTrace);
}