/* Convert old style config to new JSON format.
 *
 * Author: Steffen Vogel <post@steffenvogel.de>
 * SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University
 * SPDX-License-Identifier: Apache-2.0
 */

#include <iostream>
#include <jansson.h>
#include <libconfig.h>
#include <libgen.h>

#include <villas/config.hpp>
#include <villas/config_helper.hpp>
#include <villas/tool.hpp>
#include <villas/utils.hpp>

namespace villas {
namespace node {
namespace tools {

class Config2Json : public Tool {

public:
  Config2Json(int argc, char *argv[]) : Tool(argc, argv, "conf2json") {}

protected:
  void usage() {
    std::cout << "Usage: conf2json input.conf > output.json" << std::endl
              << std::endl;

    printCopyright();
  }

  int main() {
    int ret;
    config_t cfg;
    config_setting_t *cfg_root;
    json_t *json;

    if (argc != 2) {
      usage();
      exit(EXIT_FAILURE);
    }

    FILE *f = fopen(argv[1], "r");
    if (f == nullptr)
      return -1;

    const char *confdir = dirname(argv[1]);

    config_init(&cfg);

    config_set_include_dir(&cfg, confdir);

    ret = config_read(&cfg, f);
    if (ret != CONFIG_TRUE)
      return -2;

    cfg_root = config_root_setting(&cfg);

    json = config_to_json(cfg_root);
    if (!json)
      return -3;

    ret = json_dumpf(json, stdout, JSON_INDENT(2));
    fflush(stdout);
    if (ret)
      return ret;

    json_decref(json);
    config_destroy(&cfg);

    return 0;
  }
};

} // namespace tools
} // namespace node
} // namespace villas

int main(int argc, char *argv[]) {
  villas::node::tools::Config2Json t(argc, argv);

  return t.run();
}