// Copyright (C) 2010, Guy Barrand. All rights reserved.
// See the file tools.license for terms.

#ifndef tools_path
#define tools_path

#include <string>
#include <utility>

namespace tools {

inline void suffix(const std::string& a_string,std::string& a_value,bool a_back = true) {
  // If a_string = dir0/dir1/dir2/dir3/name.xxx
  //   a_value = xxx
  std::string::size_type pos = a_back?a_string.rfind('.'):a_string.find('.');
  if(pos==std::string::npos) {a_value.clear();return;}
  pos++;
  a_value = a_string.substr(pos,a_string.size()-pos);
}

inline void nosuffix(const std::string& a_string,std::string& a_value,bool a_back = true){
  // If a_string = dir0/dir1/dir2/dir3/name.xxx
  //   a_value = name
  // Start searching after the last / (or last \ for Windows).
  std::string::size_type pos = a_string.rfind('/');
  if(pos==std::string::npos) pos = a_string.rfind('\\');
  if(pos==std::string::npos) pos = 0;
  else pos++;
  std::string _s = a_string.substr(pos,a_string.size()-pos);
  std::string::size_type dot_pos = a_back?_s.rfind('.'):_s.find('.');
  if(dot_pos==std::string::npos) {
    a_value = std::move(_s);
  } else {
    a_value = _s.substr(0,dot_pos);
  }
}

inline void path_no_suffix(const std::string& a_string,std::string& a_value){
  // If a_string = dir0/dir1/dir2/dir3/name.xxx
  //   a_value = dir0/dir1/dir2/dir3/name
  std::string::size_type dot_pos = a_string.rfind('.');
  if(dot_pos==std::string::npos) {
    a_value = a_string;
  } else {
    a_value = a_string.substr(0,dot_pos);
  }
}

inline bool has_dir(const std::string& a_string){
  if(a_string.rfind('/')!=std::string::npos) return true;
  if(a_string.rfind('\\')!=std::string::npos) return true;
  return false;
}

inline void base_name(const std::string& a_path,std::string& a_value) {
  std::string::size_type pos_slash = a_path.rfind('/');
  std::string::size_type pos_bslash = a_path.rfind('\\');
  std::string::size_type pos = 0;
  if(pos_slash==std::string::npos) {
    if(pos_bslash==std::string::npos) {
      pos = std::string::npos;
    } else {
      pos = pos_bslash;
    }
  } else {
    if(pos_bslash==std::string::npos) {
      pos = pos_slash;
    } else {
      if(pos_slash<=pos_bslash) {
        pos = pos_bslash;
      } else {
        pos = pos_slash;
      }
    }
  }
  if(pos==std::string::npos) {a_value = a_path;return;}
  pos++;
  a_value = a_path.substr(pos,a_path.size()-pos);
}

//inline bool first_word(const std::string& a_string,std::string& a_value) {
//  if(a_string.empty()) {a_value.clear();return false;}
//  std::string::size_type pos = a_string.find(' ');
//  if(pos==std::string::npos) {a_value = a_string;return true;}
//  a_value = a_string.substr(0,pos);
//  return true;
//}

inline std::string suffix(const std::string& a_string,bool a_back = true) {
  std::string value;
  suffix(a_string,value,a_back);
  return value;
}

inline std::string nosuffix(const std::string& a_string,bool a_back = true){
  std::string value;
  nosuffix(a_string,value,a_back);
  return value;
}

inline std::string base_name(const std::string& a_path) { //deprecated.
  std::string value;
  base_name(a_path,value);
  return value;
}

inline bool is_absolute_path(const std::string& a_path) {
  if(a_path.find('\\')!=std::string::npos) { //Windows path.
    if(a_path.find(':')!=std::string::npos) return true;
    return (a_path.size()&&(a_path[0]=='\\')?true:false);
  } else { //UNIX path
    return (a_path.size()&&(a_path[0]=='/')?true:false);
  }
}

inline bool path_name_suffix(const std::string& a_string,std::string& a_path,std::string& a_name,std::string& a_suffix){
  // If a_string = dir0/dir1/dir2/dir3/name.xxx
  //   a_path = dir0/dir1/dir2/dir3
  //   a_name = name.xxx
  //   a_suffix = xxx
  // If a_string = dir0/name.xxx
  //   a_path = dir0
  //   a_name = name.xxx
  //   a_suffix = xxx
  // If a_string = name.xxx
  //   a_path.clear()
  //   a_name = name.xxx
  //   a_suffix = xxx
  // If a_string = /name.xxx
  //   a_path = "/"
  //   a_name = name.xxx
  //   a_suffix = xxx
  // If a_string = .
  //   a_path = "."
  //   a_name.clear()
  //   a_suffix.clear()
  // If a_string = ..
  //   a_path = ".."
  //   a_name.clear()
  //   a_suffix.clear()
  // If a_string = dir0/dir1/dir2/dir3/
  //   a_path = dir0/dir1/dir2/dir3
  //   a_name.clear()
  //   a_suffix.clear()
  // If a_string = dir0/dir1/dir2/dir3/.
  //   a_path = dir0/dir1/dir2/dir3
  //   a_name = "."
  //   a_suffix.clear()
  // If a_string = dir0/dir1/dir2/dir3/..
  //   a_path = dir0/dir1/dir2/dir3
  //   a_name = ".."
  //   a_suffix.clear()
  if(a_string==".") {
    a_path = ".";
    a_name.clear();
    a_suffix.clear();
    return true;
  } else if(a_string=="..") {
    a_path = "..";
    a_name.clear();
    a_suffix.clear();
    return true;
  }

  std::string::size_type pos_slash = a_string.rfind('/');
  std::string::size_type pos_bslash = a_string.rfind('\\');
  std::string::size_type pos = 0;
  if(pos_slash==std::string::npos) {
    if(pos_bslash==std::string::npos) {
      pos = std::string::npos;
    } else {
      pos = pos_bslash;
    }
  } else {
    if(pos_bslash==std::string::npos) {
      pos = pos_slash;
    } else {
      if(pos_slash<=pos_bslash) {
        pos = pos_bslash;
      } else {
        pos = pos_slash;
      }
    }
  }

  if(pos==std::string::npos) {
    a_path.clear();
    pos = 0;
  } else if(pos==0) {
    a_path = "/";
    pos++;
  } else {
    a_path = a_string.substr(0,pos);
    pos++;
  }
  std::string _s = a_string.substr(pos,a_string.size()-pos);
  pos = _s.rfind('.');
  if(pos==std::string::npos) {
    a_name = _s;
    a_suffix.clear();
  } else {
    a_name = _s;
    pos++;
    a_suffix = _s.substr(pos,_s.size()-pos);
  }
  return true;
}

inline std::string dir_name(const std::string& a_path,unsigned int a_num = 1){
  std::string path = a_path;
  for(unsigned int index=0;index<a_num;index++) {
    std::string p,n,_s;
    path_name_suffix(path,p,n,_s);
    path = p;
  }
  return path;
}

inline void quote(std::string& a_path) {
  if(a_path.find(' ')==std::string::npos) return;
  // path with spaces :
  if(a_path[0]=='"') return; //Already in double quote.
  a_path = std::string("\"")+a_path+"\"";
}

//used in OpenPAW, BatchLab.
inline bool is_f77(const std::string& a_path){
  std::string sfx = suffix(a_path);

  //tolowercase(sfx);
  for(std::string::iterator it=sfx.begin();it!=sfx.end();++it) {
    char c = *it;
    *it = ((c) >= 'A' && (c) <= 'Z' ?  c - 'A' + 'a' : c);
  }

  if(sfx=="f") return true;       //the standard.
  if(sfx=="for") return true;     //for opaw. Known by g77.
  if(sfx=="ftn") return true;     //for opaw.
  if(sfx=="fortran") return true; //for opaw.
  if(sfx=="f77") return true;
  return false;
}

//used in OpenPAW, BatchLab.
inline bool is_cpp(const std::string& a_path){
  std::string sfx = suffix(a_path);

  //tolowercase(sfx);
  for(std::string::iterator it=sfx.begin();it!=sfx.end();++it) {
    char c = *it;
    *it = ((c) >= 'A' && (c) <= 'Z' ?  c - 'A' + 'a' : c);
  }

  if(sfx=="c") return true;
  if(sfx=="cxx") return true;
  if(sfx=="cpp") return true;
  if(sfx=="C") return true;
  return false;
}

//used in OpenPAW, BatchLab.
inline bool is_python(const std::string& a_path){
  std::string sfx = suffix(a_path);

  //tolowercase(sfx);
  for(std::string::iterator it=sfx.begin();it!=sfx.end();++it) {
    char c = *it;
    *it = ((c) >= 'A' && (c) <= 'Z' ?  c - 'A' + 'a' : c);
  }

  if(sfx=="py") return true;
  return false;
}

}

#include <sstream>

namespace tools {

inline bool url_parse(const std::string& a_url,std::string& a_host,unsigned int& a_port,std::string& a_path) {
  std::string _s;
  if((a_url.size()>=7)&&(a_url.substr(0,7)=="http://")) {
    _s = a_url.substr(7,a_url.size()-7);
  } else if((a_url.size()>=8)&&(a_url.substr(0,8)=="https://")) {
    _s = a_url.substr(8,a_url.size()-8);
  } else {
    a_host.clear();
    a_port = 0;
    a_path.clear();
    return false;
  }

 {std::string::size_type pos = _s.find('/');
  if(pos==std::string::npos) {
    a_host = _s;
    a_path = "/";
  } else {
    a_host = _s.substr(0,pos);
    a_path = _s.substr(pos,_s.size()-pos);
  }}

 {std::string::size_type pos = a_host.find(':');
  if(pos==std::string::npos) {
    a_port = 0;
  } else {
    std::string sport = a_host.substr(pos+1,a_host.size()-(pos+1));
    std::istringstream strm(sport.c_str());
    strm >> a_port;
    if(strm.fail()) {
      a_host.clear();
      a_port = 0;
      a_path.clear();
      return false;
    }
    a_host = a_host.substr(0,pos);
  }}

  return true;
}

}

#endif