import 'dart:convert';
import 'dart:math';
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:package_info_plus/package_info_plus.dart';
import 'package:flutter_easyloading/flutter_easyloading.dart';
import 'package:flutter/services.dart';
import 'dart:io';
import 'package:image_picker/image_picker.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:connectivity_plus/connectivity_plus.dart';
import 'package:url_launcher/url_launcher.dart';
import 'package:crypto/crypto.dart' as crypto;

int getRandomWithNum(int min, int max) {
  if (max < min) {
    // 保护性处理：交换或抛错，这里交换
    final tmp = min;
    min = max;
    max = tmp;
  }
  final random = Random();
  return random.nextInt(max - min + 1) + min; // 生成 [min, max] 的随机数
}

double screenHeight(BuildContext context) {
  double screenHeight = MediaQuery.of(context).size.height;
  return screenHeight;
}
double screenWidth(BuildContext context) {
  double screenWidth = MediaQuery.of(context).size.width;
  return screenWidth;
}
Future<T?> pushPage<T>(Widget page, BuildContext context) {
  return Navigator.push<T>(
    context,
    MaterialPageRoute(builder: (_) => page),
  );
}

void presentOpaque(Widget page, BuildContext context) {
  Navigator.of(context).push(
    PageRouteBuilder(
      opaque: false, // 允许下层透出
      barrierColor: Colors.black.withOpacity(0.5), //路由遮罩色
      pageBuilder: (context, animation, secondaryAnimation) => page,
      transitionDuration: Duration.zero,
      reverseTransitionDuration: Duration.zero,
    ),
  );
}

class FocusHelper {
  static final FocusNode _emptyNode = FocusNode();
  /// 延迟一帧后再移交焦点，避免不生效的问题
  static void clearFocus(BuildContext context) {
    try{
      WidgetsBinding.instance.addPostFrameCallback((_) async {
        FocusScope.of(context).requestFocus(_emptyNode);
        await SystemChannels.textInput.invokeMethod('TextInput.hide');
      });
    }catch(w) {

    }

  }
}

/// 文本样式工具类，返回 Text Widget
class HhTextStyleUtils {
  /// 主要标题，返回 Text
  /// [text]: 文本内容
  /// [color]: 文本颜色，默认黑色
  /// [fontSize]: 字体大小，默认16.0
  /// [bold]: 是否加粗，默认true
  static Text mainTitle(
    String text, {
    Color color = Colors.black,
    double fontSize = 14.0,
    bool bold = true,
  }) {
    return Text(
      text,
      style: TextStyle(
        color: color,
        fontSize: fontSize,
        fontWeight: bold ? FontWeight.bold : FontWeight.normal,
      ),
    );
  }

  static TextStyle secondaryTitleStyle = TextStyle(
    color: Colors.black54,
    fontSize: 13.0,
  );

  /// 次要标题，返回 Text
  /// [text]: 文本内容
  /// [color]: 文本颜色，默认深灰
  /// [fontSize]: 字体大小，默认14.0
  /// [bold]: 是否加粗，默认false
  static Text secondaryTitle(
    String text, {
    Color color = Colors.black54,
    double fontSize = 12.0,
    bool bold = false,
  }) {
    return Text(
      text,
      style: TextStyle(
        color: color,
        fontSize: fontSize,
        fontWeight: bold ? FontWeight.bold : FontWeight.normal,
      ),
    );
  }

  /// 小文字，返回 Text
  /// [text]: 文本内容
  /// [color]: 文本颜色，默认灰色
  /// [fontSize]: 字体大小，默认12.0
  /// [bold]: 是否加粗，默认false
  static Text smallText(
    String text, {
    Color color = Colors.black54,
    double fontSize = 11.0,
    bool bold = false,
  }) {
    return Text(
      text,
      style: TextStyle(
        color: color,
        fontSize: fontSize,
        fontWeight: bold ? FontWeight.bold : FontWeight.normal,
      ),
    );
  }
}

/// 版本信息模型类
class AppVersionInfo {
  final String versionName; // 版本名称（如 1.0.0）
  final String buildNumber; // 构建号（如 1）
  final String fullVersion; // 完整版本（如 1.0.0+1）

  AppVersionInfo({
    required this.versionName,
    required this.buildNumber,
    required this.fullVersion,
  });

  @override
  String toString() {
    return fullVersion;
  }
}

// 获取应用版本信息的方法
Future<AppVersionInfo> getAppVersion() async {
  try {
    final packageInfo = await PackageInfo.fromPlatform();
    return AppVersionInfo(
      versionName: packageInfo.version,
      buildNumber: packageInfo.buildNumber,
      fullVersion: '${packageInfo.version}+${packageInfo.buildNumber}',
    );
  } catch (e) {
    // 获取失败时返回默认值
    return AppVersionInfo(
      versionName: '1.0.0',
      buildNumber: '1',
      fullVersion: '1.0.0+0',
    );
  }
}

/// ------------------------------------------------------
/// 日期格式化
/// ------------------------------------------------------
String formatDate(DateTime? date, String fmt) {
  if (date == null) return '';
  String twoDigits(int n) => n.toString().padLeft(2, '0');

  final replacements = <String, String>{
    'yyyy': date.year.toString(),
    'yy': date.year.toString().substring(2),
    'MM': twoDigits(date.month),
    'M': date.month.toString(),
    'dd': twoDigits(date.day),
    'd': date.day.toString(),
    'hh': twoDigits(date.hour),
    'h': date.hour.toString(),
    'mm': twoDigits(date.minute),
    'm': date.minute.toString(),
    'ss': twoDigits(date.second),
    's': date.second.toString(),
  };

  String result = fmt;
  replacements.forEach((key, value) {
    result = result.replaceAllMapped(RegExp(key), (_) => value);
  });
  return result;
}
/// 把 'yyyy-MM-dd HH:mm'（或 'yyyy-MM-ddTHH:mm'）解析为 DateTime，失败返回 null
DateTime? _parseYMdHm(String s) {
  if (s.isEmpty) return null;
  String t = s.trim();

  // 只包含日期的情况：yyyy-MM-dd
  if (RegExp(r'^\d{4}-\d{2}-\d{2}$').hasMatch(t)) {
    return DateTime.tryParse(t); // 默认 00:00:00
  }

  // yyyy-MM-dd HH:mm 或 yyyy-MM-ddTHH:mm
  if (RegExp(r'^\d{4}-\d{2}-\d{2}[ T]\d{2}:\d{2}$').hasMatch(t)) {
    final iso = t.replaceFirst(' ', 'T') + ':00';
    return DateTime.tryParse(iso);
  }

  // yyyy-MM-dd HH:mm:ss 或 yyyy-MM-ddTHH:mm:ss
  if (RegExp(r'^\d{4}-\d{2}-\d{2}[ T]\d{2}:\d{2}:\d{2}$').hasMatch(t)) {
    return DateTime.tryParse(t.replaceFirst(' ', 'T'));
  }

  // 都不匹配，返回 null
  return null;
}


/// 比较两个 'yyyy-MM-dd HH:mm' 格式字符串
/// 返回 1 (a>b), 0 (a==b), -1 (a<b)
int compareYMdHmStrings(String a, String b) {
  final da = _parseYMdHm(a);
  final db = _parseYMdHm(b);

  if (da == null || db == null) {
    throw FormatException("时间格式错误，期望 'yyyy-MM-dd HH:mm' 或 'yyyy-MM-dd HH:mm:ss'");
  }

  if (da.isAtSameMomentAs(db)) return 0;
  return da.isAfter(db) ? 1 : -1;
}
/// 便捷：a 是否 晚于 b
bool isAfterStr(String a, String b) => compareYMdHmStrings(a, b) == 1;

/// 便捷：a 是否 早于 b
bool isBeforeStr(String a, String b) => compareYMdHmStrings(a, b) == -1;
/// 判断传入时间字符串 (yyyy-MM-dd HH:mm) 是否早于当前时间
bool isBeforeNow(String timeStr) {
  final dt = _parseYMdHm(timeStr);
  if (dt == null) {
    throw FormatException("时间格式错误，期望 'yyyy-MM-dd HH:mm' 或 'yyyy-MM-dd HH:mm:ss'");
  }
  return dt.isBefore(DateTime.now());
}
/// ------------------------------------------------------
/// 防多次点击
/// ------------------------------------------------------
class ClickUtil {
  ClickUtil._();

  static bool _canClick = true;

  /// 调用示例：
  /// ClickUtil.noMultipleClicks(() { /* your code */ });
  static void noMultipleClicks(VoidCallback fn, {int delayMs = 2000}) {
    if (_canClick) {
      _canClick = false;
      fn();
      Future.delayed(Duration(milliseconds: delayMs), () {
        _canClick = true;
      });
    } else {
      debugPrint('请稍后点击');
    }
  }
}

void presentPage(BuildContext context, Widget page) {
  Navigator.push(
    context,
    MaterialPageRoute(fullscreenDialog: true, builder: (_) => page),
  );
}
class LoadingDialogHelper {
  static Timer? _timer;

  /// 显示加载框（带超时，默认 60 秒）
  static void show({String? message, Duration timeout = const Duration(seconds: 60)}) {
    // 先清理上一个计时器，避免重复
    _timer?.cancel();

    if (message != null) {
      EasyLoading.show(status: message);
    } else {
      EasyLoading.show();
    }

    // 设置超时自动隐藏
    _timer = Timer(timeout, () {
      // 保护性调用 dismiss（避免访问不存在的 isShow）
      try {
        EasyLoading.dismiss();
      } catch (e) {
        debugPrint('EasyLoading.dismiss error: $e');
      }
      _timer?.cancel();
      _timer = null;
    });
  }

  /// 隐藏加载框（手动触发）
  static void hide() {
    // 清理计时器
    _timer?.cancel();
    _timer = null;

    try {
      EasyLoading.dismiss();
    } catch (e) {
      debugPrint('EasyLoading.dismiss error: $e');
    }
  }
}


/// 将秒数转换为 “HH:MM:SS” 格式
String secondsCount(dynamic seconds) {
  // 先尝试解析出一个 double 值
  double totalSeconds;
  if (seconds == null) {
    totalSeconds = 0;
  } else if (seconds is num) {
    totalSeconds = seconds.toDouble();
  } else {
    // seconds 是字符串或其他，尝试 parse
    totalSeconds = double.tryParse(seconds.toString()) ?? 0.0;
  }

  // 取整秒，向下取整
  final int secs = totalSeconds.floor();

  final int h = (secs ~/ 3600) % 24;
  final int m = (secs ~/ 60) % 60;
  final int s = secs % 60;

  // padLeft 保证两位数
  final String hh = h.toString().padLeft(2, '0');
  final String mm = m.toString().padLeft(2, '0');
  final String ss = s.toString().padLeft(2, '0');

  return '$hh:$mm:$ss';
}
void printLongString(String text, {int chunkSize = 800}) {
  final pattern = RegExp('.{1,$chunkSize}'); // 每 chunkSize 个字符一组
  for (final match in pattern.allMatches(text)) {
    print(match.group(0));
  }
}

/// 表单处理
class FormUtils {
  /// 判断 [data] 中的 [key] 是否存在“有效值”：
  /// - key 不存在或值为 null -> false
  /// - String：去掉首尾空白后非空 -> true
  /// - Iterable / Map：非空 -> true
  /// - 其它类型（int、double、bool 等）只要不为 null 就算有值 -> true
  static bool hasValue(Map<dynamic, dynamic> data, String key) {
    if (!data.containsKey(key)) return false;
    final val = data[key];
    if (val == null) return false;

    if (val is String) {
      return val.trim().isNotEmpty;
    }
    if (val is Iterable || val is Map) {
      return val.isNotEmpty;
    }
    // 数字、布尔等其它非空即可
    return true;
  }
  /// 在list中根据一个 key，value，找到对应的map
  static Map<String, dynamic> findMapForKeyValue(
      List list,
      String key,
      dynamic value,
      ) {
    // 保留原有行为：null 或 空字符串 返回空 Map
    if (value == null) return <String, dynamic>{};
    if (value is String && value.isEmpty) return <String, dynamic>{};

    for (final item in list) {
      if (item is! Map) continue;
      final v = item[key];

      if (v == null) continue;

      // 1) 直接相等（类型相同或可直接比较）
      if (v == value) {
        return Map<String, dynamic>.from(item);
      }

      // 2) 数字与字符串的交叉比较（"123" <-> 123）
      if (v is num && value is String) {
        final parsed = num.tryParse(value);
        if (parsed != null && parsed == v) {
          return Map<String, dynamic>.from(item);
        }
      } else if (v is String && (value is num)) {
        final parsed = num.tryParse(v);
        if (parsed != null && parsed == value) {
          return Map<String, dynamic>.from(item);
        }
      }

      // 3) 最后回退到字符串比较（保险）
      if (v.toString() == value.toString()) {
        return Map<String, dynamic>.from(item);
      }
    }

    return <String, dynamic>{};
  }



}

class NoDataWidget {
  static Widget show({
    String text = '暂无数据',
    }) {
    return Center(
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Image.asset('assets/images/null.png', width: 200,),
          Text(text, style: TextStyle(color: Colors.grey)),
        ],
      ),
    );
  }

}
class NativeOrientation {
  static const MethodChannel _channel = MethodChannel('app.orientation');

  static Future<bool> setLandscape() async {
    try {
      final res = await _channel.invokeMethod('setOrientation', 'landscape');
      return res == true;
    } on PlatformException catch (e) {
      debugPrint('PlatformException setLandscape: $e');
      return false;
    } catch (e) {
      debugPrint('Unknown error setLandscape: $e');
      return false;
    }
  }

  static Future<bool> setPortrait() async {
    try {
      final res = await _channel.invokeMethod('setOrientation', 'portrait');
      return res == true;
    } on PlatformException catch (e) {
      debugPrint('PlatformException setPortrait: $e');
      return false;
    } catch (e) {
      debugPrint('Unknown error setPortrait: $e');
      return false;
    }
  }
}

class CameraPermissionHelper {
  static final ImagePicker _picker = ImagePicker();

  // 检查并请求相机权限（使用 ImagePicker 触发权限请求）
  static Future<bool> checkAndRequestCameraPermission() async {
    if (Platform.isIOS) {
      // 对于 iOS，使用 ImagePicker 触发权限请求
      try {
        // 尝试获取图片（但立即取消）来触发权限请求
        final XFile? file = await _picker.pickImage(
          source: ImageSource.camera,
          maxWidth: 1, // 最小尺寸，减少处理时间
          maxHeight: 1,
          imageQuality: 1,
        ).timeout(const Duration(milliseconds: 100), onTimeout: () {
          return null; // 超时返回 null，避免等待用户操作
        });

        // 无论是否成功获取文件，权限请求已经被触发
        // 现在检查实际的权限状态
        var status = await Permission.camera.status;
        return status.isGranted;
      } catch (e) {
        // 如果出现错误，回退到直接检查权限状态
        var status = await Permission.camera.status;
        return status.isGranted;
      }
    } else {
      // Android 使用标准的权限检查方式
      var status = await Permission.camera.status;
      if (status.isDenied) {
        status = await Permission.camera.request();
      }
      return status.isGranted;
    }
  }

  // 检查并请求相册权限
  static Future<bool> checkAndRequestPhotoPermission() async {
    if (Platform.isIOS) {
      // 对于 iOS，使用 ImagePicker 触发权限请求
      try {
        // 尝试获取图片（但立即取消）来触发权限请求
        final XFile? file = await _picker.pickImage(
          source: ImageSource.gallery,
          maxWidth: 1,
          maxHeight: 1,
          imageQuality: 1,
        ).timeout(const Duration(milliseconds: 100), onTimeout: () {
          return null;
        });

        // 检查实际的权限状态
        var status = await Permission.photos.status;
        return status.isGranted;
      } catch (e) {
        var status = await Permission.photos.status;
        return status.isGranted;
      }
    } else {
      // Android 使用标准的权限检查方式
      var status = await Permission.storage.status;
      if (status.isDenied) {
        status = await Permission.storage.request();
      }
      return status.isGranted;
    }
  }
}


Future<bool> checkNetworkWifi() async {
  final connectivityResult = await Connectivity().checkConnectivity();
  if (connectivityResult == ConnectivityResult.mobile) {
    print("当前是移动网络（可能是 2G/3G/4G/5G）");
    return false;
  } else if (connectivityResult == ConnectivityResult.wifi) {
    return true;
    print("当前是 WiFi");
  } else if (connectivityResult == ConnectivityResult.ethernet) {
    print("当前是有线网络");
  } else if (connectivityResult == ConnectivityResult.none) {
    print("当前无网络连接");
  }
  return false;

}
Future<void> openAppStore() async {
  String appId = '6739233192';
  // 优先使用 itms-apps 直接打开 App Store 应用（iOS）
  final Uri uri = Uri.parse('itms-apps://itunes.apple.com/app/id$appId');
  // 可选：直接打开写评论页：
  // final Uri uri = Uri.parse('itms-apps://itunes.apple.com/app/id$appId?action=write-review');

  if (await canLaunchUrl(uri)) {
    await launchUrl(uri, mode: LaunchMode.externalApplication);
    exit(0);
  } else {
    // 回退到 https 链接（在浏览器中打开 App Store 页面）
    final Uri webUri = Uri.parse('https://itunes.apple.com/app/id$appId');
    if (await canLaunchUrl(webUri)) {
      await launchUrl(webUri, mode: LaunchMode.externalApplication);
    } else {
      throw 'Could not launch App Store for app id $appId';
    }
    exit(0);
  }
}

// utils/sm2_format.dart
const int C1C2C3 = 0;
const int C1C3C2 = 1;

bool _looksLikeHex(String s) {
  final str = s.trim();
  return RegExp(r'^[0-9a-fA-F]+$').hasMatch(str) && str.length % 2 == 0;
}

/// 确保 SM2 密文的 C1 部分以 "04" 开头（hex 表示）。
/// - cipherHex: SM2.encrypt 的返回值（hex 字符串）
/// - 返回：如果输入看起来不是 hex，会直接返回原值；否则返回已处理的 hex 字符串。
String ensureC1Has04(String cipherHex) {
  if (cipherHex == null) return cipherHex;
  String s = cipherHex.trim();
  if (!_looksLikeHex(s)) return s;

  if (s.startsWith('04')) return s;

  // 最小判断：如果长度足够（至少有 128(hex) 的 C1 + 64(hex) 的 C3）
  // 128 hex = 64 bytes (X+Y each 32 bytes), C3 = 32 bytes = 64 hex
  if (s.length >= 128 + 64) {
    // 直接在开头插 '04'，把 c1 从 128->130 hex
    return '04' + s;
  }

  // 长度不符合常见 SM2 (可能是 base64 / 其他格式)，不做改动
  return s;
}

/// 去掉开头的 04（如果后端需要无 04 的 c1）
String removeC1Prefix04(String cipherHex) {
  if (cipherHex == null) return cipherHex;
  String s = cipherHex.trim();
  if (!_looksLikeHex(s)) return s;
  if (s.startsWith('04') && s.length >= 130) {
    return s.substring(2);
  }
  return s;
}

/// 尝试把输入视作 hex，并返回 hex 字符（或原样返回）
String normalizeToHexIfPossible(dynamic input) {
  if (input == null) return '';
  if (input is String) {
    final s = input.trim();
    if (_looksLikeHex(s)) return s;
    // 如果是 base64，尝试 decode -> hex
    try {
      final bytes = base64.decode(s);
      return bytesToHex(bytes);
    } catch (e) {
      return s;
    }
  }
  return input.toString();
}

/// 辅助：bytes -> hex
String bytesToHex(List<int> bytes) {
  final sb = StringBuffer();
  for (final b in bytes) {
    sb.write(b.toRadixString(16).padLeft(2, '0'));
  }
  return sb.toString();
}
String normalizeSm2Hex(String hex) {
  hex = hex.replaceAll(RegExp(r'\s+'), '').toLowerCase();
  // 如果长度是 216 hex（108 bytes），很可能就是缺 0x04 的情况
  if (hex.length == 216) {
    return '04' + hex; // 返回 218 hex（109 bytes）
  }
  // 否则按原样返回（也可加更多校验）
  return hex;
}
String md5Hex(String input) {
  final bytes = utf8.encode(input);
  final digest = crypto.md5.convert(bytes);
  return digest.bytes.map((b) => b.toRadixString(16).padLeft(2, '0')).join();
}

/// 56个民族数据字典
List<Map<String, String>> nationMapList = [
  {"code": "01", "name": "汉族"},
  {"code": "02", "name": "蒙古族"},
  {"code": "03", "name": "回族"},
  {"code": "04", "name": "藏族"},
  {"code": "05", "name": "维吾尔族"},
  {"code": "06", "name": "苗族"},
  {"code": "07", "name": "彝族"},
  {"code": "08", "name": "壮族"},
  {"code": "09", "name": "布依族"},
  {"code": "10", "name": "朝鲜族"},
  {"code": "11", "name": "满族"},
  {"code": "12", "name": "侗族"},
  {"code": "13", "name": "瑶族"},
  {"code": "14", "name": "白族"},
  {"code": "15", "name": "土家族"},
  {"code": "16", "name": "哈尼族"},
  {"code": "17", "name": "哈萨克族"},
  {"code": "18", "name": "傣族"},
  {"code": "19", "name": "黎族"},
  {"code": "20", "name": "傈僳族"},
  {"code": "21", "name": "佤族"},
  {"code": "22", "name": "畲族"},
  {"code": "23", "name": "高山族"},
  {"code": "24", "name": "拉祜族"},
  {"code": "25", "name": "水族"},
  {"code": "26", "name": "东乡族"},
  {"code": "27", "name": "纳西族"},
  {"code": "28", "name": "景颇族"},
  {"code": "29", "name": "柯尔克孜族"},
  {"code": "30", "name": "土族"},
  {"code": "31", "name": "达斡尔族"},
  {"code": "32", "name": "仫佬族"},
  {"code": "33", "name": "羌族"},
  {"code": "34", "name": "布朗族"},
  {"code": "35", "name": "撒拉族"},
  {"code": "36", "name": "毛南族"},
  {"code": "37", "name": "仡佬族"},
  {"code": "38", "name": "锡伯族"},
  {"code": "39", "name": "阿昌族"},
  {"code": "40", "name": "普米族"},
  {"code": "41", "name": "塔吉克族"},
  {"code": "42", "name": "怒族"},
  {"code": "43", "name": "乌孜别克族"},
  {"code": "44", "name": "俄罗斯族"},
  {"code": "45", "name": "鄂温克族"},
  {"code": "46", "name": "德昂族"},
  {"code": "47", "name": "保安族"},
  {"code": "48", "name": "裕固族"},
  {"code": "49", "name": "京族"},
  {"code": "50", "name": "塔塔尔族"},
  {"code": "51", "name": "独龙族"},
  {"code": "52", "name": "鄂伦春族"},
  {"code": "53", "name": "赫哲族"},
  {"code": "54", "name": "门巴族"},
  {"code": "55", "name": "珞巴族"},
  {"code": "56", "name": "基诺族"}
];