package com.dy.common.softUpgrade.parse;

import cn.hutool.core.util.HexUtil;
import com.dy.common.util.ByteUtil;
import com.dy.common.util.CRC16;

import java.io.*;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Stream;

/**
 * @Author: liurunyu
 * @Date: 2024/11/2 8:51
 * @Description
 */
public class HexFileParse {

    private static final int hexFileMinLine = 4 ;
    private static final int lineHeadEndIndex = 9 ;
    private static final int lineValidCharCount = 43 ;//每行有效字符（冒号与十六进制）个数，例如“:1096C000DC96010010020020203E00000441000052”，但倒数第3行不受限制
    private static final int bytesSplitUnit512 = 512 ;

    public static void main(String[] args) throws Exception{
        boolean fromBytes = false ;
        HexFileParse obj = new HexFileParse() ;
        if(!fromBytes){
            String filePath = "D:\\hexFile\\YuanMu_20250116_01.hex";
            //File file = new File(filePath) ;
            HexFileVo vo =  obj.doParse(filePath) ;
            System.out.println(vo.toString());
        }else{
            String filePath = "D:\\hexFile\\YuanMu_20250116_01.hex";
            File file = new File(filePath) ;
            byte[] fileContent = new byte[(int)file.length()] ;
            FileInputStream fileInputStream = new FileInputStream(file) ;
            fileInputStream.read(fileContent) ;
            HexFileVo vo =  obj.doParse(fileContent) ;
            System.out.println(vo.toString());
        }
    }
    /**
     * 解析Hex文件
     * @param path
     * @return
     * @throws Exception
     */
    public HexFileVo doParse(String path) throws Exception {
        File file = new File(path) ;
        return this.doParse(file) ;
    }

    /**
     * 解析Hex文件
     * @param file
     * @return
     * @throws Exception
     */
    public HexFileVo doParse(File file) throws Exception{
        if(file == null){
            throw new Exception("Hex文件对象为null") ;
        }
        if(!file.exists()){
            throw new Exception("Hex文件不存在") ;
        }
        Stream<String> linesStream = new BufferedReader(new FileReader(file)).lines() ;
        List<String> lineList =  linesStream.toList() ;
        HexFileVo vo = new HexFileVo() ;
        this.checkAndCalculate(vo, lineList);
        this.parse(vo, lineList);
        this.splitBytesByUnit512(vo);
        this.calculateCrc(vo);
        return vo ;
    }

    /**
     * 解析Hex文件
     * @param fileContent
     * @return
     * @throws Exception
     */
    public HexFileVo doParse(byte[] fileContent) throws Exception{
        if(fileContent == null || fileContent.length == 0){
            throw new Exception("Hex文件对象为null") ;
        }
        ByteArrayInputStream byteInputStream = new ByteArrayInputStream(fileContent);
        Stream<String> linesStream = new BufferedReader(new InputStreamReader(byteInputStream)).lines() ;
        List<String> lineList =  linesStream.toList() ;
        HexFileVo vo = new HexFileVo() ;
        this.checkAndCalculate(vo, lineList);
        this.parse(vo, lineList);
        this.splitBytesByUnit512(vo);
        this.calculateCrc(vo);
        return vo ;
    }

    /**
     * 合法性检查，并计算数据包数
     * @param vo
     * @param lineList
     * @throws Exception
     */
    private void checkAndCalculate(HexFileVo vo, List<String> lineList) throws Exception{
        if(lineList == null){
            throw new Exception("Hex文件内容为空") ;
        }
        vo.totalLines = lineList.size() ;
        if(vo.totalLines <= 0){
            throw new Exception("Hex文件内容为空") ;
        }
        if(vo.totalLines < hexFileMinLine){
            throw new Exception("Hex文件内容行数" + vo.totalLines + "不正确(最小行数" + hexFileMinLine +")") ;
        }
        vo.calculateBytes = ((((vo.totalLines - 4) * 32) / 1024)
                + ((((vo.totalLines - 4) * 32) % 1024) > 0?1 : 0))
                * 512 ;
    }

    /**
     * 解析Hex文件内容，组合成一个大数据包
     * @param vo
     * @param lineList
     * @throws Exception
     */
    private void parse(HexFileVo vo, List<String> lineList) throws Exception{
        int counter = 0 ;
        for(String line : lineList){
            if(counter == 0){
                // 文件头
            }else if(counter == vo.totalLines - 2){
                // 文件尾倒数第2行
            }else if(counter == vo.totalLines - 1){
                // 文件尾倒数第1行
            }else{
                // 文件内容
                if(line == null){
                    vo.errors.add("第" + counter + "行内容为空") ;
                }else{
                    line = line.trim() ;
                    if(line.length() == 0){
                        vo.errors.add("第" + counter + "行内容为空") ;
                    }else{
                        if(!line.startsWith(":")){
                            vo.errors.add("第" + counter + "行内容不是以:开头") ;
                        }else{
                            if(counter != vo.totalLines - 3 && line.length() != lineValidCharCount){
                                //无效数据，舍弃本行数据
                            }else{
                                line = line.substring(lineHeadEndIndex, line.length() - 2) ;
                                if(vo.bytes.length == 0){
                                    vo.bytes = HexUtil.decodeHex(line) ;
                                }else{
                                    byte[] bytes = HexUtil.decodeHex(line) ;
                                    vo.bytes = ByteUtil.bytesMerge(vo.bytes, bytes) ;
                                }
                            }
                        }
                    }
                }
            }
            counter ++ ;
        }
    }

    /**
     * 以512为单位分割数据包
     * @param bytes
     */
    public List<byte[]> splitBytesByUnit512(byte[] bytes){
        List<byte[]> listByte512 = new ArrayList<>();
        if(bytes != null && bytes.length > 0){
            int index = 0 ;
            while (true){
                if(index < bytes.length){
                    byte[] bs = ByteUtil.bytesSplit(bytes, index, bytesSplitUnit512) ;
                    listByte512.add(bs) ;
                }else{
                    break ;
                }
                index += bytesSplitUnit512;
            }
        }
        return listByte512 ;
    }

    /**
     * 以512为单位分割数据包
     * @param vo
     */
    private void splitBytesByUnit512(HexFileVo vo){
        if(vo.bytes != null && vo.bytes.length > 0){
            vo.realBytes += vo.bytes.length ;
            int index = 0 ;
            while (true){
                if(index < vo.bytes.length){
                    byte[] bytes = ByteUtil.bytesSplit(vo.bytes, index, bytesSplitUnit512) ;
                    vo.listByte512.add(bytes) ;
                    vo.totalBytes512 += bytes.length ;
                }else{
                    break ;
                }
                index += bytesSplitUnit512;
            }
        }
    }

    /**
     * 计算CRC16
     * @param vo
     */
    private void calculateCrc(HexFileVo vo){
        int crc = 0xffff ;
        if(vo.listByte512 != null && vo.listByte512.size() > 0){
            CRC16 crc16 = new CRC16() ;
            for(byte[] bs : vo.listByte512){
                crc =  crc16.CRC16_table(bs.length, bs, crc) ;
            }
        }
        vo.bytesCrc16 = crc ;
    }

}