#include "FileSystemUtil.h"

#ifndef _WIN32

#include <dirent.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>

#include <cstdio>
#include <ctime>
#include <cstdlib>
#include <cstring>

void _FindFileRev(const std::string& dirname,
                 const int skiplevel,const int maxlevel,int nowlevel,
                 const std::function<void(const std::string&)>& func)
{
    DIR* Dir = NULL;
    struct dirent* file = NULL;

    if ((Dir = opendir(dirname.c_str())) == NULL)
    {
        return ;
    }
    while ((file = readdir(Dir)) != nullptr)
    {
        if (file->d_type == DT_REG)
        {
            if(nowlevel>skiplevel) func(dirname + file->d_name);
        }
        else if (file->d_type == DT_DIR && strcmp(file->d_name, ".") != 0 && strcmp(file->d_name, "..") != 0)
        {
            if(maxlevel<1 || nowlevel<maxlevel)
            {
                _FindFileRev(dirname + file->d_name + "/" ,skiplevel,maxlevel,nowlevel+1,func);
            }
        }
    }
    closedir(Dir);
}

void FindFileRev(const std::string& dirname,
                 const int skiplevel,const int maxlevel,
                 const std::function<void(const std::string&)>& func)
{
    if (dirname[dirname.size()-1] != '/')
    {
        string curDir=dirname+"/";
        _FindFileRev(curDir,skiplevel,maxlevel,1,func);
    }
    else
    {
        _FindFileRev(dirname,skiplevel,maxlevel,1,func);
    }
}

#endif // _WIN32