import 'dart:convert';
import 'dart:io';
import 'package:yaml/yaml.dart';

void main() {
  // 输入文件和输出目录
  var inputFile = File("./lib/l10n/arb/i18n.yaml");
  var outDir = Directory("./lib/l10n/arb");

  if (!inputFile.existsSync()) {
    print('❌ i18n.yaml 文件不存在：$inputFile');
    exit(1);
  }

  // 读取并解析 yaml
  final yamlMap = loadYaml(inputFile.readAsStringSync());

  Map<String, Map<String, dynamic>> arbMaps = {};

  // 递归处理嵌套的 key
  void processYaml(Map yaml, {String? prefix}) {
    yaml.forEach((key, value) {
      if (value is Map && value.values.any((v) => v is Map)) {
        // 说明还有子层级，递归处理
        processYaml(value, prefix: prefix == null ? key : "${prefix}_$key");
      } else if (value is Map) {
        // 叶子节点：包含 zh/en/description
        final description = value['description'] ?? '';

        value.forEach((lang, text) {
          if (lang == 'description') return;

          final arbKey = prefix == null ? key : "${prefix}_$key";

          arbMaps.putIfAbsent(lang, () => {});
          arbMaps[lang]![arbKey] = text;

          if (description.toString().isNotEmpty) {
            arbMaps[lang]!['@$arbKey'] = {'description': description};
          }
        });
      }
    });
  }

  processYaml(yamlMap);

  // 创建 arb 文件
  arbMaps.forEach((lang, json) {
    final file = File("${outDir.path}/app_$lang.arb");
    final encoder = JsonEncoder.withIndent('  ');
    file.writeAsStringSync(encoder.convert(json));
    print('✅ 生成 ${file.path}');
  });

  // 执行 flutter gen-l10n
  final result = Process.runSync(
    "flutter",
    ["gen-l10n"],
    runInShell: true, // 确保跨平台可用
  );
  if (result.exitCode == 0) {
    print('✅ flutter gen-l10n 成功');
  } else {
    print('❌ flutter gen-l10n 失败：${result.stderr}');
  }
}