/*
 * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The OpenAirInterface Software Alliance licenses this file to You under
 * the OAI Public License, Version 1.1  (the "License"); you may not use this file
 * except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.openairinterface.org/?page_id=698
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *-------------------------------------------------------------------------------
 * For more information about the OpenAirInterface (OAI) Software Alliance:
 *      contact@openairinterface.org
 */

/*! \file common/config/config_userapi.c
 * \brief configuration module, api implementation to access configuration parameters
 * \author Francois TABURET
 * \date 2017
 * \version 0.1
 * \company NOKIA BellLabs France
 * \email: francois.taburet@nokia-bell-labs.com
 * \note
 * \warning
 */

#define _GNU_SOURCE

#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <dlfcn.h>
#include <arpa/inet.h>
#include "common/platform_types.h"
#include "config_userapi.h"
#include "config_common.h"
#include "../utils/LOG/log.h"

static void config_assign_processedint(configmodule_interface_t *cfg, paramdef_t *cfgoption, int val)
{
  cfgoption->processedvalue = config_allocate_new(cfg, sizeof(int), !(cfgoption->paramflags & PARAMFLAG_NOFREE));

  if (  cfgoption->processedvalue != NULL) {
    *(cfgoption->processedvalue) = val;
  } else {
    CONFIG_PRINTF_ERROR("[CONFIG] %s %d malloc error\n",__FILE__, __LINE__);
  }
}

int config_get_processedint(configmodule_interface_t *cfg, paramdef_t *cfgoption)
{
  int ret;

  if (  cfgoption->processedvalue != NULL) {
    ret=*(cfgoption->processedvalue);
    free( cfgoption->processedvalue);
    cfgoption->processedvalue=NULL;
    printf_params(cfg, "[CONFIG] %s:  set from %s to %i\n", cfgoption->optname, *cfgoption->strptr, ret);
  } else {
    fprintf (stderr,"[CONFIG] %s %d %s has no processed integer availablle\n",__FILE__, __LINE__, cfgoption->optname);
    ret=0;
  }

  return ret;
}
void config_printhelp(paramdef_t *params,int numparams, char *prefix) {
  printf("\n-----Help for section %-26s: %03i entries------\n",(prefix==NULL)?"(root section)":prefix,numparams);

  for (int i=0 ; i<numparams ; i++) {
    printf("    %s%s: %s",
           (strlen(params[i].optname) <= 1) ? "-" : "--",
           params[i].optname,
           (params[i].helpstr != NULL)?params[i].helpstr:"Help string not specified\n");
  }   /* for on params entries */

  printf("--------------------------------------------------------------------\n\n");
}

int config_execcheck(configmodule_interface_t *cfg, paramdef_t *params, int numparams, char *prefix)
{
  int st=0;

  for (int i=0 ; i<numparams ; i++) {
    if ( params[i].chkPptr == NULL) {
      continue;
    }

    if (params[i].chkPptr->s4.f4 != NULL) {
      st += params[i].chkPptr->s4.f4(cfg, &(params[i]));
    }
  }

  if (st != 0) {
    CONFIG_PRINTF_ERROR("[CONFIG] config_execcheck: section %s %i parameters with wrong value\n", prefix, -st);
  }

  return st;
}

int config_paramidx_fromname(paramdef_t *params, int numparams, char *name) {
  for (int i=0; i<numparams ; i++) {
    if (strcmp(name,params[i].optname) == 0)
      return i;
  }

  fprintf(stderr,"[CONFIG]config_paramidx_fromname , %s is not a valid parameter name\n",name);
  return -1;
}

int config_get(configmodule_interface_t *cfgif, paramdef_t *params, int numparams, char *prefix)
{
  int ret= -1;

  if (CONFIG_ISFLAGSET(CONFIG_ABORT)) {
    fprintf(stderr,"[CONFIG] config_get, section %s skipped, config module not properly initialized\n",prefix);
    return ret;
  }

  if (cfgif != NULL) {
    ret = cfgif->get(cfgif, params, numparams, prefix);

    if (ret >= 0) {
      config_process_cmdline(cfgif, params, numparams, prefix);
      if (cfgif->rtflags & CONFIG_SAVERUNCFG) {
        cfgif->set(params, numparams, prefix);
      }
      config_execcheck(cfgif, params, numparams, prefix);
    }

    return ret;
  }

  return ret;
}

int config_getlist(configmodule_interface_t *cfg, paramlist_def_t *ParamList, paramdef_t *params, int numparams, char *prefix)
{
  if (CONFIG_ISFLAGSET(CONFIG_ABORT)) {
    fprintf(stderr,"[CONFIG] config_get skipped, config module not properly initialized\n");
    return -1;
  }
  const int ret = cfg->getlist(cfg, ParamList, params, numparams, prefix);

  if (ret >= 0 && params) {
    char *newprefix;

    if (prefix) {
      int rc = asprintf(&newprefix, "%s.%s", prefix, ParamList->listname);

      if (rc < 0) newprefix = NULL;
    } else {
      newprefix = ParamList->listname;
    }

    char cfgpath[MAX_OPTNAME_SIZE*2 + 6]; /* prefix.listname.[listindex] */

    for (int i = 0; i < ParamList->numelt; ++i) {
      // TODO config_process_cmdline?
      sprintf(cfgpath, "%s.[%i]", newprefix, i);
      config_process_cmdline(cfg, ParamList->paramarray[i], numparams, cfgpath);
      if (cfg->rtflags & CONFIG_SAVERUNCFG) {
        cfg->set(ParamList->paramarray[i], numparams, cfgpath);
      }
      config_execcheck(cfg, ParamList->paramarray[i], numparams, cfgpath);
    }

    if (prefix)
      free(newprefix);
  }

  return ret;
}

int config_isparamset(paramdef_t *params,int paramidx) {
  if ((params[paramidx].paramflags & PARAMFLAG_PARAMSET) != 0) {
    return 1;
  } else {
    return 0;
  }
}

void print_intvalueerror(paramdef_t *param, char *fname, int *okval, int numokval) {
  fprintf(stderr,"[CONFIG] %s: %s: %i invalid value, authorized values:\n       ",
          fname,param->optname, (int)*(param->uptr));

  for ( int i=0; i<numokval ; i++) {
    fprintf(stderr, " %i",okval[i]);
  }

  fprintf(stderr, " \n");
}

int config_check_intval(configmodule_interface_t *cfg, paramdef_t *param)
{
  if ( param == NULL ) {
    fprintf(stderr,"[CONFIG] config_check_intval: NULL param argument\n");
    return -1;
  }

  for ( int i=0; i<param->chkPptr->s1.num_okintval ; i++) {
    if( *(param->uptr) == param->chkPptr->s1.okintval[i] ) {
      return 0;
    }
  }

  print_intvalueerror(param,"config_check_intval", param->chkPptr->s1.okintval,param->chkPptr->s1.num_okintval);
  return -1;
}

int config_check_modify_integer(configmodule_interface_t *cfg, paramdef_t *param)
{
  for (int i=0; i < param->chkPptr->s1a.num_okintval ; i++) {
    if (*(param->uptr) == param->chkPptr->s1a.okintval[i] ) {
      printf_params(cfg,
                    "[CONFIG] %s:  read value %i, set to %i\n",
                    param->optname,
                    *(param->uptr),
                    param->chkPptr->s1a.setintval[i]);
      *(param->uptr) = param->chkPptr->s1a.setintval [i];
      return 0;
    }
  }

  print_intvalueerror(param,"config_check_modify_integer", param->chkPptr->s1a.okintval,param->chkPptr->s1a.num_okintval);
  return -1;
}

int config_check_intrange(configmodule_interface_t *cfg, paramdef_t *param)
{
  if( *(param->iptr) >= param->chkPptr->s2.okintrange[0]  && *(param->iptr) <= param->chkPptr->s2.okintrange[1]  ) {
    return 0;
  }

  fprintf(stderr,"[CONFIG] config_check_intrange: %s: %i invalid value, authorized range: %i %i\n",
          param->optname, (int)*(param->uptr), param->chkPptr->s2.okintrange[0], param->chkPptr->s2.okintrange[1]);
  return -1;
}

void print_strvalueerror(paramdef_t *param, char *fname, char **okval, int numokval) {
  fprintf(stderr,"[CONFIG] %s: %s: %s invalid value, authorized values:\n       ",
          fname,param->optname, *param->strptr);

  for ( int i=0; i<numokval ; i++) {
    fprintf(stderr, " %s",okval[i]);
  }

  fprintf(stderr, " \n");
}

int config_check_strval(configmodule_interface_t *cfg, paramdef_t *param)
{
  if ( param == NULL ) {
    fprintf(stderr,"[CONFIG] config_check_strval: NULL param argument\n");
    return -1;
  }

  for ( int i=0; i<param->chkPptr->s3.num_okstrval ; i++) {
    if( strcasecmp(*param->strptr,param->chkPptr->s3.okstrval[i] ) == 0) {
      return 0;
    }
  }

  print_strvalueerror(param, "config_check_strval", param->chkPptr->s3.okstrval, param->chkPptr->s3.num_okstrval);
  return -1;
}

int config_checkstr_assign_integer(configmodule_interface_t *cfg, paramdef_t *param)
{
  for (int i=0; i < param->chkPptr->s3a.num_okstrval ; i++) {
    if (strcasecmp(*param->strptr,param->chkPptr->s3a.okstrval[i]  ) == 0) {
      config_assign_processedint(cfg, param, param->chkPptr->s3a.setintval[i]);
      return 0;
    }
  }

  print_strvalueerror(param, "config_check_strval", param->chkPptr->s3a.okstrval, param->chkPptr->s3a.num_okstrval);
  return -1;
}

void config_set_checkfunctions(paramdef_t *params, checkedparam_t *checkfunctions, int numparams) {
  for (int i=0; i< numparams ; i++ ) {
    params[i].chkPptr = &(checkfunctions[i]);
  }
}