/*
 *  upkg: tool for manipulating Unreal Tournament packages.
 *  Copyright (C) 2009 Nick Bowler
 *
 *  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
 *  (at your option) 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <glib-object.h>
#include <ltdl.h>

#include <uobject/module.h>
#include <uobject/package.h>
#include "avl.h"

static unsigned initialized;
static struct avl_table *package_tree;

static char *str_cpy_lower(char *dst, const char *src)
{
	size_t i;

	for (i = 0; src[i]; i++)
		dst[i] = tolower(src[i]);
	dst[i] = 0;

	return dst;
}

static int modcmp(const void *a, const void *b, void *_data)
{
	const GTypeModule *ma = a;
	const GTypeModule *mb = b;

	return strcmp(ma->name, mb->name);
}

int u_object_module_init(void)
{
	if (!initialized) {
		package_tree = avl_create(modcmp, NULL, NULL);
		if (!package_tree) {
			fprintf(stderr, "%s: failed to create package tree.\n", __func__);
			return -1;
		}

		g_type_init();
	}

	initialized++;
	return 0;
}

int u_object_module_exit(void)
{
	if (--initialized)
		return 0;

	avl_destroy(package_tree, NULL);

	return 0;
}

GType u_object_module_get_class(const char *package, const char *class)
{
	char buf[strlen(package) + strlen(class) + 1];
	GTypeModule search = { .name = str_cpy_lower(buf, package) };

	GTypeModule *mod = avl_find(package_tree, &search);
	if (!mod) {
		void **p;

		mod = u_pkg_new(package);
		if (!mod) {
			return 0;
		}

		p = avl_probe(package_tree, mod);
		if (!p) {
			g_object_unref(mod);
			return 0;
		}
	}

	if (!g_type_module_use(mod))
		return 0;

	str_cpy_lower(buf+strlen(package), class);
	buf[0] = toupper(buf[0]);
	buf[strlen(package)] = toupper(buf[strlen(package)]);
	return g_type_from_name(buf);
}