import 'dart:convert';
import 'dart:typed_data';

import 'package:crypto/crypto.dart';
import 'package:flutter/services.dart';

int listChangInt(List<int> list){
  int dataLen = (list[0] << 8) + list[1];
  return dataLen;
}

List<int> intChangList(int count){
  List<int> intList = [];
  double typeDouble = count / 256;
  int type1 = typeDouble.toInt();
  int type2 = count % 256;
  intList.add(type1);
  intList.add(type2);
  return intList;
}

List<String> changeIntListToStringList(List<int> list){
  List<String> strList = [];
  for(int i = 0; i<list.length; i++)
  {
    strList.add(list[i].toRadixString(16));
  }
  return strList;
}

List<int> changeStringListToIntList(List<String> list){
  List<int> intList = [];
  for(int i = 0; i<list.length; i++)
  {
    intList.add(_hexToInt(list[i]));
  }
  return intList;
}

int _hexToInt(String hex) {
  int val = 0;
  int len = hex.length;
  for (int i = 0; i < len; i++) {
    int hexDigit = hex.codeUnitAt(i);
    if (hexDigit >= 48 && hexDigit <= 57) {
      val += (hexDigit - 48) * (1 << (4 * (len - 1 - i)));
    } else if (hexDigit >= 65 && hexDigit <= 70) {
      // A..F
      val += (hexDigit - 55) * (1 << (4 * (len - 1 - i)));
    } else if (hexDigit >= 97 && hexDigit <= 102) {
      // a..f
      val += (hexDigit - 87) * (1 << (4 * (len - 1 - i)));
    } else {
      throw FormatException("Invalid hexadecimal value");
    }
  }
  return val;
}

String md5Crypto(List<int> data) {
  final dig = md5.convert(data);
  var keyStr = dig.toString();
  return keyStr.substring(0, 16).toLowerCase();
}

// 获取固定长度的数组
List<int> getFixedLengthList(List<int> data, int length) {
  for (int i = 0; i < length; i++) {
    data.add(0);
  }
  return data;
}

//int ---> 指定长度的hex (如指定长度为6的情况,0x000001 0x001234, 0xefab23)
String intToFormatHex(int num, int length) {
  String hexString = num.toRadixString(16);
  String formatString = hexString.padLeft(length, "0");
  return formatString;
}

String uint8ToHex(Uint8List byteArr) {
  if (byteArr.isEmpty) {
    return "";
  }
  Uint8List result = Uint8List(byteArr.length << 1);
  var hexTable = [
    '0',
    '1',
    '2',
    '3',
    '4',
    '5',
    '6',
    '7',
    '8',
    '9',
    'A',
    'B',
    'C',
    'D',
    'E',
    'F'
  ]; //16进制字符表
  for (var i = 0; i < byteArr.length; i++) {
    var bit = byteArr[i]; //取传入的byteArr的每一位
    var index = bit >> 4 & 15; //右移4位,取剩下四位
    var i2 = i << 1; //byteArr的每一位对应结果的两位,所以对于结果的操作位数要乘2
    result[i2] = hexTable[index].codeUnitAt(0); //左边的值取字符表,转为Unicode放进resut数组
    index = bit & 15; //取右边四位
    result[i2 + 1] =
        hexTable[index].codeUnitAt(0); //右边的值取字符表,转为Unicode放进resut数组
  }
  return String.fromCharCodes(result); //Unicode转回为对应字符,生成字符串返回
}

//TODO:int->两个字节 List 低字节在前，高字节在后(大端存储)=>嵌入式小端接收(协议用到)

int byteInt8(List<int> dataDetail, int index) => _toInt8(dataDetail[index]);
int _toInt8(int value) {
  var buffer = Int8List(4).buffer;
  var bData = ByteData.view(buffer);
  bData.setInt8(0, value);
  return bData.getInt8(0);
}

int byteInt16(List<int> dataDetail, int index) => _byteInt16(dataDetail, index);
int _byteInt16(List<int> dataDetail, int index) {
  if (checkListIndex(dataDetail, index, 2)) {
    return 0;
  }

  int value = (dataDetail[index + 1] & 0xff) << 8 | (dataDetail[index] & 0xff);
  return _toInt16(value);
}

int _toInt16(int value) {
  var buffer = Int16List(1).buffer;
  var bData = ByteData.view(buffer);
  bData.setInt16(0, value);
  int outputValue = bData.getInt16(0);
  return outputValue;
}

int byteInt32(List<int> dataDetail, int index) => _byteInt32(dataDetail, index);
int _byteInt32(List<int> dataDetail, int index) {
  if (checkListIndex(dataDetail, index, 4)) {
    return 0;
  }
  int value = ((0xFF & dataDetail[(index + 3)]) << 24 |
      (0xFF & dataDetail[index + 2]) << 16 |
      (0xFF & dataDetail[index + 1]) << 8 |
      0xFF & dataDetail[index]);
  return _toInt32(value);
}

int _toInt32(int value) {
  var buffer = Int32List(2).buffer;
  var bData = ByteData.view(buffer);
  bData.setInt32(0, value);
  int outputValue = bData.getInt32(0);
  return outputValue;
}

List<int> intToInt8List(int value) => [value];

List<int> intToByte2ListHigh(int value) => [value, value >> 8];

//TODO:int->4个字节List 低字节在前，高字节在后(大端存储) 1byte = 8bit
List<int> intToByte4ListHigh(int value) =>
    [value, value >> 8, value >> 16, value >> 24];

int byteUInt8(List<int> dataDetail, int index) => _toUInt8(dataDetail[index]);
int _toUInt8(int value) {
  var buffer = Int8List(1).buffer;
  var bData = ByteData.view(buffer);
  bData.setInt8(0, value);
  return bData.getUint8(0);
}

int byteUInt16(List<int> dataDetail, int index) =>
    _byteUInt16(dataDetail, index);
_byteUInt16(List<int> dataDetail, int index) {
  if (checkListIndex(dataDetail, index, 2)) {
    return 0;
  }
  int value = (dataDetail[index + 1]) << 8 | dataDetail[index];
  return _toUInt16(value);
}

int _toUInt16(int value) {
  var buffer = Uint16List(2).buffer;
  var bData = ByteData.view(buffer);
  bData.setInt16(0, value);
  return bData.getUint16(0);
}

int byteUInt32(List<int> dataDetail, int index) =>
    _byteUInt32(dataDetail, index);

int _byteUInt32(List<int> dataDetail, int index) {
  if (checkListIndex(dataDetail, index, 4)) {
    return 0;
  }
  int value = ((0xFF & dataDetail[(index + 3)]) << 24 |
      (0xFF & dataDetail[index + 2]) << 16 |
      (0xFF & dataDetail[index + 1]) << 8 |
      0xFF & dataDetail[index]);
  return _toUInt32(value);
}

int _toUInt32(int value) {
  var buffer = Int32List(2).buffer;
  var bData = ByteData.view(buffer);
  bData.setInt32(0, value);
  int outputValue = bData.getUint32(0);
  return outputValue;
}

bool checkListIndex(List<int> dataDetail, int index, int offsetLength) {
  if (dataDetail == null) {
    return true;
  }
  var len = dataDetail.length;
  bool result = index + offsetLength > len;
  if (result) {}
  return result;
}

int checkSum(List<int> data) {
  int sum = 0;
  for (int v in data) {
    sum ^= v;
  }
  return sum;
}

Future<List<int>> loadAssetsFile(String assetsPath) async {
  var byteData = await rootBundle.load(assetsPath);
  return byteData.buffer.asUint8List().toList();
}

//获取截取后的数组
List<List<T>> splitList<T>(List<T> list, int len) {
  if (len <= 1) {
    return [list];
  }

  List<List<T>> result = [];
  int index = 1;

  while (true) {
    if (index * len < list.length) {
      List<T> temp = list.skip((index - 1) * len).take(len).toList();
      result.add(temp);
      index++;
      continue;
    }
    List<T> temp = list.skip((index - 1) * len).toList();
    result.add(temp);
    break;
  }
  return result;
}

//TODO:int->两个字节 List 高字节在前，低字节在后(小端存储) 本工程只有配置 WiFi用到的!!!!
List<int> intToByte2ListLow(int value) => [value >> 8, value];

String radixHex16String(List<int> codeUnits) {
  String result = '';
  for (var value in codeUnits) {
    result += value.toRadixString(16).padLeft(2, '0');
  }
  return result;
}

String radixHex16StringTo2String(List<int> codeUnits) {
  String result = '';
  codeUnits.forEach((value) {
    result += int.parse(value.toRadixString(16).padLeft(2, '0'),radix: 16).toRadixString(2);
  });
  return result;
}

String asciiString(List<int> codeUnits) {
  String result = '';
  for (var value in codeUnits) {
    result += String.fromCharCode(value);
  }
  return result;
}

String utf8String(List<int> codeUnits) {
  codeUnits.reversed;
  List<int> uniqueList = [];
  for (int i = 0; i < codeUnits.length; i++) {
    if (codeUnits[i] != 0) {
      uniqueList.add(codeUnits[i]);
    }
  }
  uniqueList.reversed;
  return utf8.decode(uniqueList).toString();
}

bool compareTwoList({List<int>? list1, List<int>? list2}) {
  if (list1!.length != list2!.length) return false;
  int ctn = list1.length;
  for (int i = 0; i < ctn; i++) {
    int v1 = list1[i];
    int v2 = list2[i];
    if (v1 != v2) {
      return false;
    }
  }
  return true;
}

List<int> encodeStringToInt(String input) => utf8.encode(input);