/*-
 * Copyright (c) 2008-2009 Juan Romero Pardines.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <unistd.h>
#include <fcntl.h>

#include <xbps_api.h>

static prop_dictionary_t
make_dict_from_pkg(const char *name, const char *ver, const char *desc)
{
	prop_dictionary_t dict;

	dict = prop_dictionary_create();
	assert(dict != NULL);

	prop_dictionary_set_cstring_nocopy(dict, "pkgname", name);
	prop_dictionary_set_cstring_nocopy(dict, "version", ver);
	prop_dictionary_set_cstring_nocopy(dict, "short_desc", desc);

	return dict;
}

int
xbps_register_pkg(prop_dictionary_t pkgrd, bool update, bool automatic)
{
	prop_dictionary_t dict, pkgd, newpkgd;
	prop_array_t array;
	const char *pkgname, *version, *desc, *rootdir;
	char *plist;
	int rv = 0;

	rootdir = xbps_get_rootdir();
	plist = xbps_xasprintf("%s/%s/%s", rootdir,
	    XBPS_META_PATH, XBPS_REGPKGDB);
	if (plist == NULL)
		return EINVAL;

	prop_dictionary_get_cstring_nocopy(pkgrd, "pkgname", &pkgname);
	prop_dictionary_get_cstring_nocopy(pkgrd, "version", &version);
	prop_dictionary_get_cstring_nocopy(pkgrd, "short_desc", &desc);

	dict = prop_dictionary_internalize_from_file(plist);
	if (dict == NULL) {
		/*
		 * No packages registered yet. Register package into
		 * the dictionary.
		 */
		dict = prop_dictionary_create();
		if (dict == NULL) {
			free(plist);
			return ENOMEM;
		}

		array = prop_array_create();
		if (array == NULL) {
			rv = ENOMEM;
			goto out;
		}

		pkgd = make_dict_from_pkg(pkgname, version, desc);
		if (!xbps_add_obj_to_array(array, pkgd)) {
			prop_object_release(array);
			rv = EINVAL;
			goto out;
		}

		prop_dictionary_set_bool(pkgd, "automatic-install",
			automatic);

		if (!xbps_add_obj_to_dict(dict, array, "packages")) {
			prop_object_release(array);
			rv = EINVAL;
			goto out;
		}

	} else {
		/*
		 * Check if package is already registered and return
		 * an error if not updating.
		 */
		pkgd = xbps_find_pkg_in_dict(dict, "packages", pkgname);
		if (pkgd != NULL && update == false) {
			rv = EEXIST;
			goto out;
		}
		array = prop_dictionary_get(dict, "packages");
		if (array == NULL) {
			rv = ENOENT;
			goto out;
		}

		newpkgd = make_dict_from_pkg(pkgname, version, desc);
		prop_dictionary_set_bool(newpkgd, "automatic-install",
		    automatic);

		/*
		 * Add the requiredby objects for dependent packages.
		 */
		if (pkgrd && xbps_pkg_has_rundeps(pkgrd)) {
			rv = xbps_requiredby_pkg_add(array, pkgrd);
			if (rv != 0) {
				prop_object_release(newpkgd);
				goto out;
			}
		}

		if (update) {
			/*
			 * If updating a package, set new version in
			 * pkg dictionary.
			 */
			prop_dictionary_set_cstring_nocopy(pkgd,
			    "version", version);
		} else {
			/*
			 * If installing a package, add new pkg
			 * dictionary into the packages array.
			 */
			if (!xbps_add_obj_to_array(array, newpkgd)) {
				prop_object_release(newpkgd);
				rv = EINVAL;
				goto out;
			}
		}
	}

	if (!prop_dictionary_externalize_to_file(dict, plist))
		rv = errno;

out:
	prop_object_release(dict);
	free(plist);

	return rv;
}