#include <QCoreApplication>

#include <QFile>

#include <iostream>
#include <memory>

#include <getopt.h>

#include "carmakercvt.h"

static char gstr_inputpath[256];
static char gstr_outputpath[256];
static char gstr_grpcserver[256];

void print_useage()
{
    std::cout<<" -i --input $xodrfile : set  input file path. eq.  -i d:/lk.xodr"<<std::endl;
    std::cout<<" -o --output $outputfile : set output file. eq.  -o d:/test.rd5"<<std::endl;
    std::cout<<" -s --grpcserver  set server grpc ip & port. eq.  -s 111.33.136.149:50091"<<std::endl;
    std::cout<<" -h --help print help"<<std::endl;
}

int  GetOptLong(int argc, char *argv[]) {
    int nRtn = 0;
    int opt; // getopt_long() 的返回值
    int digit_optind = 0; // 设置短参数类型及是否需要参数
    (void)digit_optind;

    // 如果option_index非空，它指向的变量将记录当前找到参数符合long_opts里的
    // 第几个元素的描述，即是long_opts的下标值
    int option_index = 0;
    // 设置短参数类型及是否需要参数
    const char *optstring = "i:o:s:h";

    // 设置长参数类型及其简写，比如 --reqarg <==>-r
    /*
    struct option {
             const char * name;  // 参数的名称
             int has_arg; // 是否带参数值，有三种：no_argument， required_argument，optional_argument
             int * flag; // 为空时，函数直接将 val 的数值从getopt_long的返回值返回出去，
                     // 当非空时，val的值会被赋到 flag 指向的整型数中，而函数返回值为0
             int val; // 用于指定函数找到该选项时的返回值，或者当flag非空时指定flag指向的数据的值
        };
    其中：
        no_argument(即0)，表明这个长参数不带参数（即不带数值，如：--name）
            required_argument(即1)，表明这个长参数必须带参数（即必须带数值，如：--name Bob）
            optional_argument(即2)，表明这个长参数后面带的参数是可选的，（即--name和--name Bob均可）
     */
    static struct option long_options[] = {
        {"input", required_argument, NULL, 'i'},
        {"output", required_argument, NULL, 'o'},
        {"grpcserver", required_argument, NULL, 's'},
        {"help",  no_argument,       NULL, 'h'},
 //       {"optarg", optional_argument, NULL, 'o'},
        {0, 0, 0, 0}  // 添加 {0, 0, 0, 0} 是为了防止输入空值
    };

    while ( (opt = getopt_long(argc,
                               argv,
                               optstring,
                               long_options,
                               &option_index)) != -1) {
//        printf("opt = %c\n", opt); // 命令参数，亦即 -a -b -n -r
//        printf("optarg = %s\n", optarg); // 参数内容
//        printf("optind = %d\n", optind); // 下一个被处理的下标值
//        printf("argv[optind - 1] = %s\n",  argv[optind - 1]); // 参数内容
//        printf("option_index = %d\n", option_index);  // 当前打印参数的下标值
//        printf("\n");
        switch(opt)
        {
        case 'i':
            strncpy(gstr_inputpath,optarg,255);
            break;
        case 'o':
            strncpy(gstr_outputpath,optarg,255);
            break;
        case 's':
            strncpy(gstr_grpcserver,optarg,255);
            break;
        case 'h':
            print_useage();
            nRtn = 1; //because use -h
            break;
        default:
            break;
        }

    }

    return nRtn;
}



std::string GetFileName(char * strpath)
{
    int npos = -1;
    int nsize = static_cast<int>(strnlen(strpath,256));
    int i;
    for(i=(nsize-2);i>=0;i--)
    {
        if((strpath[i] == '/')||(strpath[i] == '\\'))
        {
            npos = i+1;
            break;
        }
    }

    std::string strrtn;
    if(npos  == -1)
    {
        strrtn = strpath;
    }
    else
    {
        char strname[256];
        strncpy(strname,strpath+npos,256);
        strrtn = strname;
    }
    return strrtn;
}

std::string GetServerstr()
{
    std::string strserverstr = "111.33.136.149:50091";
    QFile xFile;
    xFile.setFileName("carmakerservice.txt");
    if(xFile.open(QIODevice::ReadOnly))
    {
        char str[256];
        xFile.readLine(str,256);
        std::cout<<" open file. server : "<<str<<std::endl;
        strserverstr = str;
        xFile.close();
    }
    return  strserverstr;
}


int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    snprintf(gstr_inputpath,256," ");
    snprintf(gstr_outputpath,256," ");
    snprintf(gstr_grpcserver,256," ");

    int nRtn = GetOptLong(argc,argv);
    if(nRtn == 1)  //show help,so exit.
    {
        return 0;
    }


#ifdef TESTC
    snprintf(gstr_inputpath,255,"/home/yuchuli/demodata/lk.xodr");
    snprintf(gstr_outputpath,255,"/home/yuchuli/demodata/lk1.rd5");
#endif

    if(strncmp(gstr_inputpath , " ",255) == 0)
    {
        std::cout<<"Please use -i set input file path."<<std::endl;
        print_useage();
        return 0;
    }

    char strout[1000];
    snprintf(strout,1000,"Input File Path: %s",gstr_inputpath);
    std::cout<<strout<<std::endl;

    if(strncmp(gstr_outputpath , " ",255) == 0)
    {
        std::cout<<"Please use -o set output file path."<<std::endl;
        print_useage();
        return 0;
    }

    snprintf(strout,1000,"Output File Path: %s",gstr_outputpath);
    std::cout<<strout<<std::endl;

    std::string strinputname = GetFileName(gstr_inputpath);
    std::string stroutputname = GetFileName(gstr_outputpath);

    std::cout<<"input name: "<<strinputname<<std::endl;

    std::string strcmd = "xodr2rd5.exe ";
    strcmd = strcmd + "-i "+strinputname + " -o "+stroutputname;
    std::cout<<"cmd: "<<strcmd<<std::endl;

    std::shared_ptr<char> pstr_ptr = nullptr;
    int ninputsize = 0;
    QFile xFile;
    xFile.setFileName(gstr_inputpath);
    if(xFile.open(QIODevice::ReadOnly))
    {
        QByteArray ba= xFile.readAll();
        ninputsize = ba.size();
        if(ninputsize > 0)
        {
            pstr_ptr = std::shared_ptr<char>(new char[ninputsize]);
            memcpy(pstr_ptr.get(),ba.data(),static_cast<size_t>(ninputsize));
        }
        xFile.close();
    }
    else
    {
        std::cout<<"FATAL Errror. Can't Open input File. Please Check Input File."<<std::endl;
        return -1;
    }

    if(ninputsize == 0)
    {
        std::cout<<"FATAL Error. Input File is empty."<<std::endl;
        return  -2;
    }

    std::shared_ptr<char> pout_ptr;
    int noutputsize = 0;
    int nres;

    std::string strserverstr = GetServerstr();
    if(strncmp(gstr_grpcserver , " ",255) != 0)
    {
        strserverstr = gstr_grpcserver;
    }
    std::cout<<" grpcserver: "<<strserverstr<<std::endl;
    carmakercvt * pcvt = new carmakercvt(strserverstr);
    nres = pcvt->GetRes(strinputname,stroutputname,strcmd,pstr_ptr,ninputsize,pout_ptr,noutputsize);

    if(nres != 1)
    {
        std::cout<<" GetRes Fail.Fail Code is: "<<nres<<std::endl;
        if(nres == -1)
        {
            std::cout<<" Convert Fail. Please Check Input File"<<std::endl;
        }
        if(nres == -2)
        {
            std::cout<<" NO Carmaker Service."<<std::endl;
        }
        if(nres == -3)
        {
            std::cout<<" Server Can't Connect."<<std::endl;
        }
        return -3;
    }

    if(noutputsize == 0)
    {
        std::cout<<" Get File size is 0,please check"<<std::endl;
        return -4;
    }

    QFile xFileOut;
    xFileOut.setFileName(gstr_outputpath);
    if(xFileOut.open(QIODevice::ReadWrite))
    {
        xFileOut.write(pout_ptr.get(),noutputsize);
        xFileOut.close();
    }
    else
    {
        std::cout<<" Can't Output data to File. "<<" Output Path: "<<gstr_outputpath<<std::endl;
        return -5;
    }

    return 0;



    return a.exec();
}