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/* Copyright (c) 2026 The Solidite Developers
 *
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>. */

#include <bitset>
#include <filesystem>
#include <iostream>
#include <locale>
#include <sstream>
#include <string>
#include <vector>

#include <sys/stat.h>

int main(int argc, char* argv[]) {
  // locale work
  std::locale::global(std::locale(""));
  std::cerr.imbue(std::locale()); 

  std::vector<std::string> directories;
  std::bitset<4> options = 0b00;
  /* bitset[0]=do not process arguments further (-- encountered) 
   * bitset[1]=-p flag, create intermediate directories
   * bitset[2]=ignore -m XXX for internal use to not process the mode argument
   *           as a directory to create
   * bitset[3]=-m flag is chosen to change mode*/
  uint_fast16_t mode = 777;

  for (int i = 1; i < argc; ++i) {
    if (options.test(2) == 1) {
      options.reset(2);
      continue;
      // ignore the next XXX argument if -m XXX
    }

    const std::string &ARG = argv[i];
    if (options.test(0) == 0) {
      if (ARG == "--") {
        options.set(0);
        continue;
      }

      if (ARG[0] == '-') {
        if (ARG.find('p') != std::string::npos)
          options.set(1);
        if (ARG.find('m') != std::string::npos) {
          if (i + 1 > argc - 1) {
            std::cerr << "octal integer required after -m\n";
            return 1;
          }
          std::istringstream(ARG) >> std::oct >> mode;
          options.set(2); // set ignore XXX argument if -m XXX
          options.set(3);
        }
      } else
        directories.push_back(ARG);
    }
  }

  for (std::string directory : directories) {
    if (options.test(1) == 0)
      std::filesystem::create_directory(directory);
    else
      std::filesystem::create_directories(directory);
    if (options.test(3) == 1) {
      try {
        chmod(directory.c_str(), mode);
      } catch (...) {
        std::cerr << "failed to change permissions: " + directory + '\n';
        return 1;
      }
    }
  }
  return 0;
}