/**
 * Navit, a modular navigation system.
 * Copyright (C) 2005-2008 Navit Team
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * 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 <stdlib.h>
#include <glib.h>
#include "config.h"
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#else
#include <XGetopt.h>
#endif
#include "config_.h"
#include "version.h"
#include "item.h"
#include "coord.h"
#include "main.h"
#include "route.h"
#include "navigation.h"
#include "track.h"
#include "debug.h"
#include "event.h"
#include "event_glib.h"
#include "xmlconfig.h"
#include "file.h"
#include "search.h"
#include "start_real.h"
#include "linguistics.h"
#include "navit_nls.h"
#include "atom.h"
#include "command.h"
#include "geom.h"
#ifdef HAVE_API_WIN32_CE
#include <windows.h>
#include <winbase.h>
#endif

char *version=PACKAGE_VERSION" "SVN_VERSION""NAVIT_VARIANT;
int main_argc;
char * const* main_argv;

static void
print_usage(void)
{
	printf("%s",_("navit usage:\n"
	"navit [options] [configfile]\n"
	"\t-c <file>: use <file> as config file\n"
	"\t-d <n>: set the global debug output level to <n> (0-3). Overrides setting from config file.\n"
	"\t-h: print this usage info and exit.\n"
	"\t-v: Print the version and exit.\n"));
}


#ifndef USE_PLUGINS
extern void builtin_init(void);
#endif /* USE_PLUGINS*/

int main_real(int argc, char * const* argv)
{
	xmlerror *error = NULL;
	char *config_file = NULL, *command=NULL, *startup_file=NULL;
	int opt;
	char *cp;
	struct attr navit, conf;

	GList *list = NULL, *li;
	main_argc=argc;
	main_argv=argv;

#ifdef HAVE_GLIB
	event_glib_init();
#else
	_g_slice_thread_init_nomessage();
#endif
	atom_init();
	main_init(argv[0]);
	navit_nls_main_init();
	debug_init(argv[0]);

	cp = getenv("NAVIT_LOGFILE");
	if (cp) {
		debug_set_logfile(cp);
	}
#ifdef HAVE_API_WIN32_CE
	else {	
		debug_set_logfile("/Storage Card/navit.log");
	}
#endif
	file_init();
#ifndef USE_PLUGINS
	builtin_init();
#endif
	route_init();
	navigation_init();
	tracking_init();
	search_init();
	linguistics_init();
	geom_init();
	config_file=NULL;
#ifdef HAVE_GETOPT_H
	opterr=0;  //don't bomb out on errors.
#endif /* _MSC_VER */
	/* ingore iphone command line argument */
	if (argc == 2 && !strcmp(argv[1],"-RegisterForSystemEvents"))
		argc=1;
	if (argc > 1) {
		/* Don't forget to update the manpage if you modify theses options */
		while((opt = getopt(argc, argv, ":hvc:d:e:s:")) != -1) {
			switch(opt) {
			case 'h':
				print_usage();
				exit(0);
				break;
			case 'v':
				printf("%s %s\n", "navit", version);
				exit(0);
				break;
			case 'c':
				printf("config file n is set to `%s'\n", optarg);
	            config_file = optarg;
				break;
			case 'd':
				debug_set_global_level(atoi(optarg), 1);
				break;
			case 'e':
				command=optarg;
				break;
			case 's':
				startup_file=optarg;
				break;
#ifdef HAVE_GETOPT_H
			case ':':
				fprintf(stderr, "navit: Error - Option `%c' needs a value\n", optopt);
				print_usage();
				exit(2);
				break;
			case '?':
				fprintf(stderr, "navit: Error - No such option: `%c'\n", optopt);
				print_usage();
				exit(3);
#endif
			}
	  }
		// use 1st cmd line option that is left for the config file
		if (optind < argc) config_file = argv[optind];
	}

	// if config file is explicitely given only look for it, otherwise try std paths
	if (config_file) {
		list = g_list_append(list,g_strdup(config_file));
	} else {
		list = g_list_append(list,g_strjoin(NULL,getenv("NAVIT_USER_DATADIR"), "/navit.xml" , NULL));
		list = g_list_append(list,g_strdup("navit.xml.local"));
		list = g_list_append(list,g_strdup("navit.xml"));
#ifdef HAVE_API_ANDROID
		// new preferred location (the new one should have priority over the legacy!)
		list = g_list_append(list,g_strdup("/sdcard/navit/navit.xml"));
		// legacy location, still supported
		list = g_list_append(list,g_strdup("/sdcard/navit.xml"));
#endif
		list = g_list_append(list,g_strjoin(NULL,getenv("NAVIT_SHAREDIR"), "/navit.xml.local" , NULL));
		list = g_list_append(list,g_strjoin(NULL,getenv("NAVIT_SHAREDIR"), "/navit.xml" , NULL));
#ifndef _WIN32
		list = g_list_append(list,g_strdup("/etc/navit/navit.xml"));
#endif
	}
	li = list;
	for (;;) {
		if (li == NULL) {
			// We have not found an existing config file from all possibilities
			dbg(0, "%s", _("No config file navit.xml, navit.xml.local found\n"));
			return 4;
		}
        // Try the next config file possibility from the list
		config_file = li->data;
		dbg(1,"trying %s\n",config_file);
		if (file_exists(config_file)) {
			break;
		}
		g_free(config_file);
		li = g_list_next(li);
	}

	dbg(0,"Loading %s\n",config_file);
	if (!config_load(config_file, &error)) {
		dbg(0, _("Error parsing config file '%s': %s\n"), config_file, error ? error->message : "");
	} else {
		dbg(0, _("Using config file '%s'\n"), config_file);
	}
	while (li) {
		g_free(li->data);
		li = g_list_next(li);
	}
	g_list_free(list);
	if (! config_get_attr(config, attr_navit, &navit, NULL) && !config_empty_ok) {
		dbg(0, "%s", _("Internal initialization failed, exiting. Check previous error messages.\n"));
		exit(5);
	}
	conf.type=attr_config;
	conf.u.config=config;
	if (startup_file) {
		FILE *f=fopen(startup_file,"r");
		if (f) {
			char buffer[4096];
			while(fgets(buffer, sizeof(buffer), f)) {
				command_evaluate(&conf, buffer);
			}
		}
	}
	if (command) {
		command_evaluate(&conf, command);
	}
	event_main_loop_run();

	/* TODO: Android actually has no event loop, so we can't free all allocated resources here. Have to find better place to
	 *  free all allocations on program exit. And don't forget to free all the stuff allocated in the code above.
	 */
#ifndef HAVE_API_ANDROID
	linguistics_free();
	debug_finished();
#endif
	return 0;
}