import 'package:dio/dio.dart';
import 'package:dio/adapter.dart';
import 'dart:io';
import 'dart:ui';
import 'dart:convert';
import 'package:convert/convert.dart';
import 'package:crypto/crypto.dart';
import 'package:zhiying_comm/zhiying_comm.dart';
import 'package:package_info/package_info.dart';
import 'package:device_info/device_info.dart';
import 'package:fluttertoast/fluttertoast.dart';

typedef OnSuccess = dynamic Function(dynamic data);
typedef OnError = dynamic Function(String e);

class NetUtil {
  static final String APPKEY = "123";
  Dio _dio;
  static String _apiVersion;

  NetUtil._() {}
  static NetUtil _instance;
  static NetUtil getInstance() {
    if (_instance == null) {
      _instance = NetUtil._();
    }
    return _instance;
  }

  get dio async {
    if (_dio == null) {
      var setting = await NativeUtil.getSetting();
      String domain = setting['domain']; //'http://www.hairuyi.com/';
      String version = setting['version']; //'42';
      _config(domain, apiVersion: _apiVersion);
    }
    return _dio;
  }

  // 配置网络请求，基础地址，代理地址,如：192.168.0.123:8888（代理地址生产环境无效）
  // apiVersion 接口版本
  void _config(String baseUrl, {String proxyUrl, String apiVersion}) {
    _dio = Dio(BaseOptions(
        method: "post",
        baseUrl: baseUrl,
        connectTimeout: 15000,
        receiveTimeout: 15000,
        contentType: Headers.formUrlEncodedContentType,
        followRedirects: true));
    _dio.interceptors.add(_NetInterceptors());

    _apiVersion = apiVersion;
    const bool inProduction = const bool.fromEnvironment("dart.vm.product");
    if (proxyUrl != null && proxyUrl != '' && !inProduction) {
      _setProxy(proxyUrl);
    }
  }

  void _setProxy(String proxyUrl) {
    (_dio.httpClientAdapter as DefaultHttpClientAdapter).onHttpClientCreate =
        (HttpClient client) {
      client.findProxy = (uri) {
        return "PROXY $proxyUrl";
      };
      client.badCertificateCallback =
          (X509Certificate cert, String host, int port) => true;
    };
  }

  /// 统一添加必要的参数
  static Future<Map<String, dynamic>> signParams(
      Map<String, dynamic> params) async {
    if (_apiVersion != null) {
      params["version"] = _apiVersion;
    }
    if (Platform.isIOS) {
      params["platform"] = "iOS";
      DeviceInfoPlugin deviceInfo = DeviceInfoPlugin();
      IosDeviceInfo iosInfo = await deviceInfo.iosInfo;
      params["systemVersion"] = iosInfo.systemVersion;
    } else if (Platform.isAndroid) {
      params["platform"] = "Android";
      DeviceInfoPlugin deviceInfo = DeviceInfoPlugin();
      AndroidDeviceInfo androidInfo = await deviceInfo.androidInfo;
      String androidVersion = androidInfo.version.release;
      params["systemVersion"] = "Android $androidVersion";
    }

    PackageInfo packageInfo = await PackageInfo.fromPlatform();
    String version = packageInfo.version; //版本号
    params["appVersion"] = version;
    int width = window.physicalSize.width.floor();
    int height = window.physicalSize.height.floor();
    params["resolutionRatio"] = "$width*$height";

    String token = await NativeUtil.getToken();
    if (token != null &&
        token != '' &&
        (!params.containsKey('token') || params['token'] == '')) {
      params['token'] = token;
    }
    params["time"] = getNowTime();

    // 过滤空字段，过滤首尾空格
    Map<String, dynamic> filters = Map<String, dynamic>();
    params.forEach((key, value) {
      if (key != '' && value != '') {
        filters[key] = (value is String) ? value.trim() : value;
      }
    });
    params = filters;

    List<String> list = List<String>();
    params.forEach((key, value) {
      list.add(key.toString() + value.toString());
    });
    params["sign"] = signWithArray(list);
    return params;
  }

  /// 签名
  static String signWithArray(List<String> params) {
    params.sort();
    String result = "";
    result += APPKEY;
    params.forEach((param) {
      result += param;
    });
    result += APPKEY;
    return generateMd5(result);
  }

  // md5 加密
  static String generateMd5(String data) {
    var content = new Utf8Encoder().convert(data);
    var digest = md5.convert(content);
    // 这里其实就是 digest.toString()
    return hex.encode(digest.bytes);
  }

  /// 获取时间戳，单位：秒
  static String getNowTime() {
    int timestamp = (DateTime.now().millisecondsSinceEpoch / 1000).floor();
    return "$timestamp";
  }

  @Deprecated('方法弃用，建议使用 NetUtil.requet')
  static Future<dynamic> post(String path,
      {Map<String, dynamic> params}) async {
    if (params == null) {
      params = {};
    }
    Map<String, dynamic> sign = await signParams(params);
    Response response;
    try {
      Dio dio = await NetUtil.getInstance().dio;
      response = await dio.post(path, data: sign);
    } on DioError catch (e) {
      _formatError(e);
    }
    if (response == null) {
      return {};
    }

    if (response.statusCode != 200) {
      const bool inProduction = const bool.fromEnvironment("dart.vm.product");
      if (!inProduction) {
        Fluttertoast.showToast(msg: response.statusMessage);
      }
      // log.e(response.statusMessage);
      return {};
    }

    var result = jsonDecode(response.data);

    if (result['success'] == 0 || result['success'] == '0') {
      print('error: ' + result['msg']);
      Fluttertoast.showToast(
        msg: result['msg'],
        toastLength: Toast.LENGTH_SHORT,
        gravity: ToastGravity.BOTTOM,
      );
      return {};
    }
    return result['data'];
  }

  static Future<dynamic> post2(String path,
      {Map<String, dynamic> params}) async {
    // if (params == null) {
    //   params = {};
    // }
    // Map<String, dynamic> sign = await signParams(params);
    // Response response;
    // try {
    //   Dio dio = await NetUtil.getInstance().dio;
    //   response = await dio.post(path, data: sign);
    // } on DioError catch (e) {
    //   _formatError(e);
    // }
    // if (response == null) {
    //   return {};
    // }

    // if (response.statusCode != 200) {
    //   const bool inProduction = const bool.fromEnvironment("dart.vm.product");
    //   if (!inProduction) {
    //     Fluttertoast.showToast(msg: response.statusMessage);
    //   }
    //   log.e(response.statusMessage);
    //   return {};
    // }

    // var result = jsonDecode(response.data);

    // if (result['success'] == 0 || result['success'] == '0') {
    //   print('error: ' + result['msg']);
    //   Fluttertoast.showToast(
    //     msg: result['msg'],
    //     toastLength: Toast.LENGTH_SHORT,
    //     gravity: ToastGravity.BOTTOM,
    //   );
    //   return result;
    // }
    // return result['data'];
  }

  /*
   * error统一处理
   */
  static void _formatError(DioError e) {
    // if (e.type == DioErrorType.CONNECT_TIMEOUT) {
    //   log.d('连接超时: ${e.toString()}');
    // } else if (e.type == DioErrorType.SEND_TIMEOUT) {
    //   log.d('请求超时: ${e.toString()}');
    // } else if (e.type == DioErrorType.RECEIVE_TIMEOUT) {
    //   log.d('响应超时: ${e.toString()}');
    // } else if (e.type == DioErrorType.RESPONSE) {
    //   log.d('出现异常: ${e.toString()}');
    // } else if (e.type == DioErrorType.CANCEL) {
    //   log.d('请求取消: ${e.toString()}');
    // } else {
    //   log.d('未知错误: ${e.toString()}');
    // }
  }

  static void request(String path,
      {String method = 'POST',
      Map<String, dynamic> params,
      Map<String, File> multiFiles,
      OnSuccess onSuccess,
      OnError onError}) async {
    if (params == null) {
      params = {};
    }
    signParams(params).then((sign) async {
      print('params => ${sign.toString()}');
      Dio dio = await NetUtil.getInstance().dio;
      if (multiFiles != null && multiFiles.length > 0) {
        for (String key in multiFiles.keys) {
          var file = await MultipartFile.fromFile(multiFiles[key].path);
          sign[key] = file;
        }
      }

      FormData formdata = FormData.fromMap(sign);
      return dio.request(path,
          data: formdata, options: Options(method: method));
    }).then((response) {
      var result = jsonDecode(response.data);
      if (result['success'] == 0 || result['success'] == '0') {
        print('error: ' + result['msg']);
        Fluttertoast.showToast(
          msg: result['msg'],
          toastLength: Toast.LENGTH_SHORT,
          gravity: ToastGravity.BOTTOM,
        );
        if (onError != null) {
          onError(result['msg'] ?? '未知错误');
        }
        return;
      }
      if (onSuccess != null) {
        onSuccess(result['data']);
      }
    }).catchError((error) {
      onError(error.toString());
    });
  }
}

/**
 * @description: 网络请求拦截器
 * @param {type} 
 * @return: 
 */
class _NetInterceptors extends InterceptorsWrapper {
  @override
  Future onRequest(RequestOptions options) {
    print("${options?.method} => ${options?.path}");

    return super.onRequest(options);
  }

  @override
  Future onResponse(Response response) {
    print("response[${response?.statusCode}] => ${response?.data}");

    return super.onResponse(response);
    // String data = response?.data;
    // Map<String, dynamic> map = json.decode(data);
    // var success = map['success'];
    // if (success != null && '$success' == '1') {
    //   return super.onResponse(response);
    // } else {
    //   response.data = response?.data['msg'] ?? '未知错误';
    //   return NetUtil._dio.reject(Response(data: response));
    // }
  }

  @override
  Future onError(DioError err) {
    print("ERROR[${err?.response?.statusCode}] => PATH: ${err?.request?.path}");
    return super.onError(err);
  }
}