/*   Cataract - Static web photo gallery generator
 *   Copyright (C) 2008 Tomas Bzatek <tbzatek@users.sourceforge.net>
 *
 *   This program 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 2
 *   of the License, or 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 General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>

#include <glib.h>

#include <libxml/xmlmemory.h>

#include <config.h>

#include "setup.h"
#include "generators.h"






/*
 *   parse_cmd: parse commandline and fill global variable parameters
 */
gboolean
parse_cmd (int argc, char* argv[], char **source_dir, char **dst_dir, gboolean *verbose)
{
  static gboolean _verbose = FALSE;
  static gchar *_source_dir = NULL;
  static gchar *_dst_dir = NULL;

  static GOptionEntry entries[] =
	{
	  { "verbose", 'v', 0, G_OPTION_ARG_NONE, &_verbose, "Be verbose", NULL },
	  { "source", 's', 0, G_OPTION_ARG_STRING, &_source_dir, "Specifies path to source structure", NULL },
	  { "output", 'o', 0, G_OPTION_ARG_STRING, &_dst_dir, "Generate files to the specified directory instead of current", NULL },
	  { NULL }
	};

  GError *error = NULL;
  GOptionContext *context;
  char *s1;

  g_set_prgname ("cgg");

  context = g_option_context_new ("- web gallery generator");
  s1 = g_strdup_printf ("cgg v%s [%s]  %s", VERSION, APP_BUILD_DATE, APP_COPYRIGHT_STRING);
  g_option_context_set_summary (context, s1);
  g_free (s1);
  g_option_context_add_main_entries (context, entries, NULL);

  if (argc == 1) {
	s1 = g_option_context_get_help (context, TRUE, NULL);
    g_print ("%s", s1);
    g_free (s1);
    g_option_context_free (context);
    return FALSE;
  }

  if (! g_option_context_parse (context, &argc, &argv, &error)) {
    g_print ("option parsing failed: %s\n", error->message);
	s1 = g_option_context_get_help (context, TRUE, NULL);
    g_print ("%s", s1);
    g_free (s1);
    g_option_context_free (context);
    return FALSE;
  }
  g_option_context_free (context);

  *source_dir = _source_dir;
  *dst_dir = _dst_dir;
  *verbose = _verbose;

  return TRUE;
}



int
main(int argc, char* argv[])
{
  char *source_dir;
  char *dst_dir;
  gboolean verbose;
  TGallerySetup *setup;

  /*
   * this initialize the library and check potential ABI mismatches
   * between the version it was compiled for and the actual shared
   * library used.
   */
  LIBXML_TEST_VERSION;

  source_dir = NULL;
  dst_dir = NULL;
  setup = malloc(sizeof(TGallerySetup));


  /*  Parse commandline  */
  if (! parse_cmd (argc, argv, &source_dir, &dst_dir, &verbose))
    return -1;

  if ((! source_dir) || (access (source_dir, R_OK))) {
    fprintf (stderr, "error: source directory must be specified and pointing to valid structure\n");
    return -4;
  }
  if (! dst_dir) {
    fprintf (stderr, "error: target directory must be specified\n");
    return -5;
  }

  /*  Read gallery settings  */
  if (! find_setup_xml (setup)) {
    fprintf (stderr, "error: could not parse gallery settings file\n");
    return -2;
  }

  setup->real_templates_dir = find_templates_directory (setup);
  if (setup->real_templates_dir == NULL) {
    fprintf (stderr, "error: could not determine templates directory\n");
    return -3;
  }


  /*  Start building the gallery tree  */
  setup->verbose = verbose;
  build_tree (setup, source_dir, dst_dir, NULL);


  /*  Cleanup function for the XML library. */
  xmlCleanupParser();

  free (source_dir);
  free (dst_dir);
  free_setup_data (setup);

  return (0);
}