/*to use malloc*/
#include <stdlib.h>
/*to use libconfig*/
#include <libconfig.h>
/*to use struct pq_confo*/
#include "pqconfo.h"

/*get Postgresql connection information*/
int get_pq_confo(const char * file,const struct pq_confo ** confo){
  /*declaration*/
  config_t cfg;
  const char * db, * host, * secret, * user;
  int port;

  fprintf(stdout,"get_pq_confo() Started...\n");
  /*initialise new and EMPTY config*/
  config_init(&cfg);

  /* Read the file. If there is an error, report it and exit. */
  /*TODO Validate config file name!*/
  if(! config_read_file(&cfg, file))
  {
    fprintf(stderr, "get_pq_confo() %s:%d - %s\n", config_error_file(&cfg),
            config_error_line(&cfg), config_error_text(&cfg));
    /*destroy config, BUT NOT the structure*/
    config_destroy(&cfg);
    return 2;
  }
  fprintf(stdout,"get_pq_confo() Parsing config file done\n");

  /*lookup db string*/
  if(config_lookup_string(&cfg, "pq.db", &db)){
    printf("get_pq_confo() db: %s\n", db);
  }else{
    fprintf(stderr, "get_pq_confo() NO 'db' setting in config file found.\n");
    return 3;
  }

  /*lookup host string*/
  if(config_lookup_string(&cfg, "pq.host", &host)){
    printf("get_pq_confo() host: %s\n", host);
  }else{
    fprintf(stderr, "get_pq_confo() NO 'host' setting in config file found.\n");
    return 4;
  }

  /*lookup secret string*/
  if(config_lookup_string(&cfg, "pq.secret", &secret)){
    printf("get_pq_confo() secret: %s\n", secret);
  }else{
    fprintf(stderr, "get_pq_confo() NO 'secret' setting in config file found.\n");
    return 5;
  }

  /*lookup user string*/
  if(config_lookup_string(&cfg, "pq.user", &user)){
    printf("get_pq_confo() user: %s\n", user);
  }else{
    fprintf(stderr, "get_pq_confo() NO 'user' setting in config file found.\n");
    return 6;
  }

  /*lookup port int*/
  if(config_lookup_int(&cfg, "pq.port", &port)){
    printf("get_pq_confo() port: %d\n", port);
  }else{
    fprintf(stderr, "get_pq_confo() NO 'port' setting in config file found.\n");
    return 7;
  }

  /*create struct*/
  struct pq_confo * pqConfo = (struct pq_confo  *)malloc( sizeof(struct pq_confo));
  sprintf(pqConfo->db,"%s",db);
  sprintf(pqConfo->host,"%s",host);
  pqConfo->port=port;
  sprintf(pqConfo->secret,"%s",secret);
  sprintf(pqConfo->user,"%s",user);
  *confo = pqConfo;

  /*destroy config, BUT NOT the structure*/
  config_destroy(&cfg);

  /*return success*/
  return 0;
}

/*free Postgresql connection information*/
int free_pq_confo(const struct pq_confo ** confo){
  free((struct pq_confo *)*confo);
  return 0;
}