import 'package:yaml/yaml.dart';
import 'dart:io';
import 'package:path/path.dart' as path;

class FlutterStringGetConfig {
  String inputDir;
  String outputFile;
  String language;

  FlutterStringGetConfig({
    required this.inputDir,
    required this.outputFile,
    this.language = 'zh_CN',
  });

  factory FlutterStringGetConfig.defaults() {
    return FlutterStringGetConfig(
      inputDir: 'assets/string/base/*.xml',
      outputFile: 'lib/resource/string.gen.dart',
      language: 'zh_CN',
    );
  }

  factory FlutterStringGetConfig.fromProject() {
    try {
      final getConfig = FlutterStringGetConfig.defaults();
      final file = File('pubspec.yaml');
      if (!file.existsSync()) return getConfig;

      final yamlContent = file.readAsStringSync();
      final yaml = loadYaml(yamlContent);
      final config = yaml['flutter_string_get'];

      if (config == null) return getConfig;
      String input = _normalizePath(config['input']?.toString());
      String output = _normalizePath(config['output']?.toString());
      String language = _normalizePath(config['language']?.toString());

      if (input.isNotEmpty) {
        getConfig.inputDir = input;
      }
      if (output.isNotEmpty) {
        getConfig.outputFile = output;
      }
      if (language.isNotEmpty) {
        getConfig.language = language;
      }
      return getConfig;
    } catch (e) {
      print('Error parsing flutter_string_get config: $e');
      return FlutterStringGetConfig.defaults();
    }
  }

  static String _normalizePath(String? rawPath, {bool isDirectory = false}) {
    if (rawPath == null || rawPath.isEmpty) return '';

    // 强制替换所有反斜杠为正斜杠（跨平台兼容）
    final unifiedPath = rawPath.replaceAll(r'\', '/');

    // 保留目录末尾的斜杠
    bool hasTrailingSlash = unifiedPath.endsWith('/');
    String normalized = unifiedPath;

    // 仅处理路径中的 `.` 和 `..`
    normalized = path.posix.normalize(normalized); // 使用 posix 风格的 normalize

    if (isDirectory && !hasTrailingSlash) {
      normalized += '/';
    }

    return normalized;
  }
}