/*********************************************************************
Query - Retreive data from a remote data server.
Query is part of GNU Astronomy Utilities (Gnuastro) package.

Original author:
     Mohammad akhlaghi <mohammad@akhlaghi.org>
Contributing author(s):
Copyright (C) 2020-2025 Free Software Foundation, Inc.

Gnuastro is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation, either version 3 of the License, or (at your
option) any later version.

Gnuastro 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
General Public License for more details.

You should have received a copy of the GNU General Public License
along with Gnuastro. If not, see <http://www.gnu.org/licenses/>.
**********************************************************************/
#include <config.h>

#include <argp.h>
#include <errno.h>
#include <error.h>
#include <stdio.h>
#include <string.h>

#include <gnuastro/fits.h>
#include <gnuastro/pointer.h>

#include <gnuastro-internal/timing.h>
#include <gnuastro-internal/options.h>
#include <gnuastro-internal/checkset.h>
#include <gnuastro-internal/fixedstringmacros.h>

#include "main.h"

#include "ui.h"
#include "query.h"
#include "authors-cite.h"





/**************************************************************/
/*********      Argp necessary global entities     ************/
/**************************************************************/
/* Definition parameters for the Argp: */
const char *
argp_program_version = PROGRAM_STRING "\n"
                       GAL_STRINGS_COPYRIGHT
                       "\n\nWritten/developed by "PROGRAM_AUTHORS;

const char *
argp_program_bug_address = PACKAGE_BUGREPORT;

static char
args_doc[] = "DATABASE";

const char
doc[] = GAL_STRINGS_TOP_HELP_INFO PROGRAM_NAME" is just a place holder "
  "used as a minimal set of files and functions necessary for a program in "
  "Gnuastro. It can be used for learning or as a template to build new "
  "programs.\n"
  GAL_STRINGS_MORE_HELP_INFO
  /* After the list of options: */
  "\v"
  PACKAGE_NAME" home page: "PACKAGE_URL;




















/**************************************************************/
/*********    Initialize & Parse command-line    **************/
/**************************************************************/
static void
ui_initialize_options(struct queryparams *p,
                      struct argp_option *program_options,
                      struct argp_option *gal_commonopts_options)
{
  size_t i;
  struct gal_options_common_params *cp=&p->cp;


  /* Set the necessary common parameters structure. */
  cp->program_struct     = p;
  cp->poptions           = program_options;
  cp->program_name       = PROGRAM_NAME;
  cp->program_exec       = PROGRAM_EXEC;
  cp->program_bibtex     = PROGRAM_BIBTEX;
  cp->program_authors    = PROGRAM_AUTHORS;
  cp->coptions           = gal_commonopts_options;

  /* Program-specific initializations. */
  p->head                = GAL_BLANK_SIZE_T;

  /* Modify common options. */
  for(i=0; !gal_options_is_last(&cp->coptions[i]); ++i)
    {
      /* Select individually. */
      switch(cp->coptions[i].key)
        {
        case GAL_OPTIONS_KEY_LOG:
        case GAL_OPTIONS_KEY_TYPE:
        case GAL_OPTIONS_KEY_SEARCHIN:
        case GAL_OPTIONS_KEY_QUIETMMAP:
        case GAL_OPTIONS_KEY_IGNORECASE:
        case GAL_OPTIONS_KEY_NUMTHREADS:
        case GAL_OPTIONS_KEY_MINMAPSIZE:
        case GAL_OPTIONS_KEY_STDINTIMEOUT:
          cp->coptions[i].flags=OPTION_HIDDEN;
          break;
        }

      /* Select by group. */
      switch(cp->coptions[i].group)
        {
        case GAL_OPTIONS_GROUP_TESSELLATION:
          cp->coptions[i].doc=NULL; /* Necessary to remove title. */
          cp->coptions[i].flags=OPTION_HIDDEN;
          break;
        }
    }
}





/* Fixed string */
#define UI_NODATABASE "Please use the '--database' ('-d') option to "   \
  "specify your desired database, see manual ('info gnuastro "          \
  "astquery' command) for the current databases, here is the list "     \
  "of acceptable values (with their web-based search URLs):\n\n"        \
  "    astron     https://vo.astron.nl/\n"                              \
  "    gaia       https://gea.esac.esa.int/archive\n"                   \
  "    ned        https://ned.ipac.caltech.edu/tap/sync\n"              \
  "    vizier     http://vizier.u-strasbg.fr/viz-bin/VizieR\n"




/* Parse a single option: */
error_t
parse_opt(int key, char *arg, struct argp_state *state)
{
  struct queryparams *p = state->input;

  /* Pass 'gal_options_common_params' into the child parser.  */
  state->child_inputs[0] = &p->cp;

  /* In case the user incorrectly uses the equal sign (for example
     with a short format or with space in the long format, then 'arg'
     start with (if the short version was called) or be (if the long
     version was called with a space) the equal sign. So, here we
     check if the first character of arg is the equal sign, then the
     user is warned and the program is stopped: */
  if(arg && arg[0]=='=')
    argp_error(state, "incorrect use of the equal sign ('='). For short "
               "options, '=' should not be used and for long options, "
               "there should be no space between the option, equal sign "
               "and value");

  /* Set the key to this option. */
  switch(key)
    {
    /* Read the non-option tokens (arguments): */
    case ARGP_KEY_ARG:
      /* The user may give a shell variable that is empty! In that case
         'arg' will be an empty string! We don't want to account for such
         cases (and give a clear error that no input has been given). */
      if(arg[0]!='\0') p->databasestr=arg;
      break;

    /* This is an option, set its value. */
    default:
      return gal_options_set_from_key(key, arg, p->cp.poptions, &p->cp);
    }

  return 0;
}





char *
ui_strlist_to_str(gal_list_str_t *input)
{
  char *out=NULL;
  gal_list_str_t *node;
  size_t n, nn, nnodes=0, alllen=0;

  /* First calculate the full length of all nodes. */
  for(node=input; node!=NULL; node=node->next)
    {
      /* We'll add two extra for each. One for the ',' that must come in
         between it and the next one. One just for a buffer, incase we
         haven't accounted for something. */
      alllen += strlen(node->v) + 2;
      ++nnodes;
    }

  /* Allocate the output string. */
  out=gal_pointer_allocate(GAL_TYPE_STRING, alllen, 1, "out", __func__);

  /* Write all the strings into the allocated space. */
  n=nn=0;
  for(node=input; node!=NULL; node=node->next)
    {
      if(nn++==nnodes-1)
        sprintf(out+n, "%s", node->v);
      else
        n += sprintf(out+n, "%s,", node->v);
    }

  /* Return the merged string. */
  return out;
}




















/**************************************************************/
/***************       Sanity Check         *******************/
/**************************************************************/
/* Check ONLY the options. When arguments are involved, do the check
   in 'ui_check_options_and_arguments'. */
static void
ui_check_only_options(struct queryparams *p)
{
  size_t i;
  double *darray;
  gal_data_t *tmp;
  int keepinputdir;
  char *suffix, *rdsuffix, *basename;

  /* See if database has been specified. */
  if(p->databasestr==NULL)
    error(EXIT_FAILURE, 0, "no input database! " UI_NODATABASE);

  /* Convert the given string into a code. */
  if(      !strcmp(p->databasestr, "astron") ) p->database=QUERY_DATABASE_ASTRON;
  else if( !strcmp(p->databasestr, "gaia") )   p->database=QUERY_DATABASE_GAIA;
  else if( !strcmp(p->databasestr, "ned") )    p->database=QUERY_DATABASE_NED;
  else if( !strcmp(p->databasestr, "vizier") ) p->database=QUERY_DATABASE_VIZIER;
  else
    error(EXIT_FAILURE, 0, "'%s' is not a recognized database.\n\n"
          "For the full list of recognized databases, please see the "
          "documentation (with the command 'info astquery')", p->databasestr);

  /* If '--limitinfo' is given, but the string is empty (possibly due to a
     shell variable that wasn't set), remove it. */
  if(p->limitinfo && p->limitinfo[0]=='\0')
    {
      free(p->limitinfo);
      p->limitinfo=NULL;
      for(i=0; !gal_options_is_last(&p->cp.poptions[i]); ++i)
        if( p->cp.poptions[i].key == UI_KEY_LIMITINFO )
          p->cp.poptions[i].set=GAL_OPTIONS_NOT_SET;
    }

  /* If '--ccol' is given, first merge all possible calls to it, confirm
     that there are only two values and put them into the 'ra_name' and
     'dec_name' variables. */
  if(p->ccol)
    {
      gal_options_merge_list_of_csv(&p->ccol);
      if(gal_list_str_number(p->ccol)!=2)
        error(EXIT_FAILURE, 0, "2 values should be given to '--ccol', "
              "but you have given %zu values (possibly in multiple calls "
              "to '--ccols'). Recall that '--ccol' is the coordinate "
              "column (usually RA and Dec). You can either put them in "
              "one call (for example '--ccol=ra,dec') or in two (for "
              "example '--ccol=ra --ccol=dec')",
              gal_list_str_number(p->ccol));
      p->ra_name=p->ccol->v;
      p->dec_name=p->ccol->next->v;
    }

  /* If '--noblank' or '--sort' are given (possibly multiple times, each
     with multiple column names) break it up into individual names. */
  if(p->sort)    gal_options_merge_list_of_csv(&p->sort);
  if(p->noblank) gal_options_merge_list_of_csv(&p->noblank);

  /* Make sure that '--query' and '--center' are not called together. */
  if(p->query && (p->center || p->overlapwith) )
    error(EXIT_FAILURE, 0, "the '--query' option cannot be called together "
          "together with '--center' or '--overlapwith'");

  /* Overlapwith cannot be called with the manual query. */
  if( p->overlapwith && (p->center || p->width || p->radius) )
    error(EXIT_FAILURE, 0, "the '--overlapwith' option cannot be called "
          "with the manual region specifiers ('--center', '--width' or "
          "'--radius')");

  /* The radius and width cannot be called together. */
  if(p->radius && p->width)
    error(EXIT_FAILURE, 0, "the '--radius' and '--width' options cannot be "
          "called together");

  /* If radius is given, it should be one value and positive. */
  if(p->radius)
    {
      if(p->radius->size>1)
        error(EXIT_FAILURE, 0, "only one value can be given to '--radius' "
              "('-r') option");

      if( ((double *)(p->radius->array))[0]<0 )
        error(EXIT_FAILURE, 0, "the '--radius' option value cannot be negative");
    }

  /* Make sure the range values are reasonable. */
  i=0;
  if(p->range)
    for(tmp=p->range; tmp!=NULL; tmp=tmp->next)
      {
        /* Basic preparations. */
        ++i;
        darray=tmp->array;

        /* Make sure only two values are given. */
        if(tmp->size!=2)
          error(EXIT_FAILURE, 0, "two values (separated by ',' or ':') "
                "should be given to '--range'. But %zu values were given "
                "to the %zu%s call of this option (recall that the first "
                "value should be the column name in the given dataset)",
                tmp->size, i,
                i==1 ? "st" : i==2 ? "nd" : i==3 ? "rd" : "th");

        /* Make sure the first value is large than the second. */
        if(darray[0]>darray[1])
          error(EXIT_FAILURE, 0, "the first value of '--range' "
                "should be smaller than, or equal to, the second, "
                "but %g>%g", darray[0], darray[1]);

        /* None of the values should be 'nan'. */
        if( isnan(darray[0]) || isnan(darray[1]) )
          error(EXIT_FAILURE, 0, "values to '--range' cannot be NaN");

        /* ADQL doesn't recognize 'inf', so if the user gives '-inf' or
           'inf', change it to the smallest/largest possible floating point
           number. */
        if( isinf(darray[0]) == -1 ) darray[0] = -FLT_MAX;
        if( isinf(darray[1]) ==  1 ) darray[1] =  FLT_MAX;
      }

  /* Make sure the widths are reasonable. */
  if(p->width && p->center)
    {
      /* Width should have the same number of elements as the center
         coordinates */
      if( p->width->size > 1 && p->width->size != p->center->size )
        error(EXIT_FAILURE, 0, "'--width' should either have a single "
              "value (used for all dimensions), or one value for each "
              "dimension. However, you have provided %zu coordinate "
              "values, and %zu width values", p->center->size,
              p->width->size);

      /* All values must be positive. */
      for(i=0;i<p->width->size;++i)
        if( ((double *)(p->width->array))[i]<0 )
          error(EXIT_FAILURE, 0, "the '--width' option value(s) cannot "
                "be negative");
    }

  /* Make sure that the output name is in a writable location and that it
     doesn't exist. If it exists, and the user hasn't called
     '--dontdelete', then delete the existing file. */
  gal_checkset_writable_remove(p->cp.output, NULL, p->cp.keep,
                               p->cp.dontdelete);

  /* Set the suffix of the default download names for NED (since extinction
     is given only in VOTable, with an '.xml' suffix). */
  if( p->database==QUERY_DATABASE_NED
      && p->datasetstr
      && !strcmp(p->datasetstr, "extinction") )
    {
      suffix=".xml";
      rdsuffix="-raw-download.xml";
    }
  else
    {
      suffix=".fits";
      rdsuffix="-raw-download.fits";
    }

  /* Currently Gnuastro doesn't read or write XML files (VOTable). So if
     the downloaded file is an XML file but the user hasn't given an XML
     suffix, abort and inform the user. */
  if(p->cp.output)
    {
      if( !strcmp(suffix,".xml")
          && strcmp(&p->cp.output[strlen(p->cp.output)-4], ".xml") )
        error(EXIT_FAILURE, 0, "this dataset's output is a VOTable (with "
              "an '.xml' suffix). However, Gnuastro doesn't yet support "
              "VOTable, so it won't do any checks and corrections on "
              "the downloaded file. Please give an output name with an "
              "'.xml' suffix to continue");
    }

  /* Set the name for the downloaded and final output name. These are due
     to an internal low-level processing that will be done on the raw
     downloaded file. */
  else
    {
      basename=gal_checkset_malloc_cat(p->databasestr, suffix);
      p->cp.output=gal_checkset_make_unique_suffix(basename, suffix);
      free(basename);
    }

  /* Currently we don't interally process VOTable (in '.xml' suffix) files,
     so to keep the next steps un-affected, we'll set Query to not delete
     the raw download and copy the name of the output into the raw
     download. */
  if( !strcmp(suffix, ".xml") )
    {
      p->keeprawdownload=1;
      gal_checkset_allocate_copy(p->cp.output, &p->downloadname);
    }
  else
    {
      /* Make sure the output name doesn't exist (and report an error if
         '--dontdelete' is called. Just note that for the automatic output,
         we are basing that on the output, not the input. So we are
         temporarily activating 'keepinputdir'. */
      keepinputdir=p->cp.keepinputdir;
      p->cp.keepinputdir=1;
      gal_checkset_writable_remove(p->cp.output, NULL, 0, p->cp.dontdelete);
      p->downloadname=gal_checkset_automatic_output(&p->cp, p->cp.output,
                                                    rdsuffix);
      p->cp.keepinputdir=keepinputdir;
    }
}





static void
ui_check_options_and_arguments(struct queryparams *p)
{

}




















/**************************************************************/
/***************       Preparations         *******************/
/**************************************************************/
static void
ui_preparations(struct queryparams *p)
{

}



















/**************************************************************/
/************         Set the parameters          *************/
/**************************************************************/
void
ui_read_check_inputs_setup(int argc, char *argv[], struct queryparams *p)
{
  struct gal_options_common_params *cp=&p->cp;


  /* Just to avoid warning on no minmapsize. It is irrelevant here. */
  p->cp.minmapsize=-1;


  /* Include the parameters necessary for argp from this program ('args.h')
     and for the common options to all Gnuastro ('commonopts.h'). We want
     to directly put the pointers to the fields in 'p' and 'cp', so we are
     simply including the header here to not have to use long macros in
     those headers which make them hard to read and modify. This also helps
     in having a clean environment: everything in those headers is only
     available within the scope of this function. */
#include <gnuastro-internal/commonopts.h>
#include "args.h"


  /* Initialize the options and necessary information.  */
  ui_initialize_options(p, program_options, gal_commonopts_options);


  /* Read the command-line options and arguments. */
  errno=0;
  if(argp_parse(&thisargp, argc, argv, 0, 0, p))
    error(EXIT_FAILURE, errno, "parsing arguments");


  /* Read the configuration files and set the common values. */
  gal_options_read_config_set(&p->cp);


  /* Sanity check only on options. */
  ui_check_only_options(p);


  /* Print the option values if asked. Note that this needs to be done
     after the option checks so un-sane values are not printed in the
     output state. */
  gal_options_print_state(&p->cp);


  /* Prepare all the options as FITS keywords to write in output later. */
  gal_options_as_fits_keywords(&p->cp);


  /* Check that the options and arguments fit well with each other. Note
     that arguments don't go in a configuration file. So this test should
     be done after (possibly) printing the option values. */
  ui_check_options_and_arguments(p);


  /* Read/allocate all the necessary starting arrays. */
  ui_preparations(p);
}




















/**************************************************************/
/************      Free allocated, report         *************/
/**************************************************************/
void
ui_free_report(struct queryparams *p, struct timeval *t1)
{
  /* Free the allocated arrays: */
  free(p->cp.hdu);
  free(p->cp.output);
  free(p->datasetstr);
  free(p->datasetuse);
  free(p->downloadname);
}