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

import 'package:flutter/services.dart';

//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){
    print('❌解析 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();
}


//TODO:获取数据包分包后包的数量
int getPackageCount(List<int> data,{required int averageLen}){
  int len = data.length;
  return len%averageLen > 0 ? (len~/averageLen + 1) : len~/averageLen;
}

List<int>  getSubData({
  required int index,
  required int average,
  required List<int> data
}){
  if(data == null || data.length == 0){
    return [];
  }
  int totalLength = data.length;
  if(average >= totalLength){
    return data;
  }

  if(index*average > totalLength){
    if((index -  1)*average > totalLength){
      return [];
    }else{
      int tempCount = average*(index - 1);
      return data.sublist(tempCount,totalLength);
    }
  }else{
    return data.sublist(average*(index - 1),average*index);
  }
}

List<int> reverseList(List<int> srcData){
  print('srcData:$srcData'); //[1,3]
  int srcLen = srcData.length;
  int halfLen = srcLen ~/2;
  List<int> dstData = [];
  dstData.addAll(srcData);
  for(int i =0; i < halfLen; i++){
    int begin = i;
    int end = srcLen-i-1;
    List<int> beginData = srcData.sublist(begin,begin+1);
    List<int> endData = srcData.sublist(end,end + 1);
    dstData.replaceRange(begin, begin+1, endData);
    dstData.replaceRange(end, end+1, beginData);
  }
  print('dstData:$dstData');
  return dstData;
}

//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];


int dealWeekDays({
  required int mon,
  required int tue,
  required int wed,
  required int thu,
  required int fri,
  required int sat,
  required int sun,
}){
  return mon + tue * 2 + wed * 4 + thu * 8 + fri * 16 + sat * 32 + sun * 64;
}

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

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

String utf8String(List<int> codeUnits){
  return utf8.decode(codeUnits);
}

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){
      print('不包含 $i');
      return false;
    }
  }
  return true;
}

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