/*-
 * 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 <strings.h>
#include <errno.h>
#include <limits.h>

#include <xbps_api.h>

static void
write_plist_file(prop_dictionary_t dict, const char *file)
{
	assert(dict != NULL || file != NULL);

	if (!prop_dictionary_externalize_to_file(dict, file)) {
		prop_object_release(dict);
		printf("=> ERROR: couldn't write to %s (%s)",
		    file, strerror(errno));
		exit(EXIT_FAILURE);
	}
}

static void
usage(void)
{
	printf("usage: xbps-pkgdb [options] [action] [args]\n"
	"\n"
	"  Available actions:\n"
	"    getpkgname, getpkgrevision, getpkgversion, register\n"
	"    sanitize-plist, unregister, version\n"
	"\n"
	"  Action arguments:\n"
	"    getpkgname\t\t<string>\n"
	"    getpkgrevision\t<string>\n"
	"    getpkgversion\t<string>\n"
	"    register\t\t<pkgname> <version> <shortdesc>\n"
	"    sanitize-plist\t<plist>\n"
	"    unregister\t\t<pkgname> <version>\n"
	"    version\t\t<pkgname>\n"
	"\n"
	"  Options shared by all actions:\n"
	"    -r\t\t\t<rootdir>\n"
	"\n"
	"  Options used by the register action:\n"
	"    -a\t\t\tSet automatic installation flag.\n"
	"\n"
	"  Examples:\n"
	"    $ xbps-pkgdb getpkgname foo-2.0\n"
	"    $ xbps-pkgdb getpkgrevision foo-2.0_1\n"
	"    $ xbps-pkgdb getpkgversion foo-2.0\n"
	"    $ xbps-pkgdb register pkgname 2.0 \"A short description\"\n"
	"    $ xbps-pkgdb sanitize-plist /blah/foo.plist\n"
	"    $ xbps-pkgdb unregister pkgname 2.0\n"
	"    $ xbps-pkgdb version pkgname\n");

	exit(EXIT_FAILURE);
}

int
main(int argc, char **argv)
{
	prop_dictionary_t dict;
	const char *version;
	char *plist, *pkgname, *in_chroot_env, *root = NULL;
	bool automatic = false, in_chroot = false;
	int c, rv = 0;

	while ((c = getopt(argc, argv, "ar:")) != -1) {
		switch (c) {
		case 'a':
			/* Set automatic install flag */
			automatic = true;
			break;
		case 'r':
			/* To specify the root directory */
			root = strdup(optarg);
			if (root == NULL)
				exit(EXIT_FAILURE);
			xbps_set_rootdir(root);
			break;
		case '?':
		default:
			usage();
		}
	}

	argc -= optind;
	argv += optind;

	if (argc < 1)
		usage();

	plist = xbps_xasprintf("%s/%s/%s", root, XBPS_META_PATH, XBPS_REGPKGDB);
	if (plist == NULL) {
		printf("=> ERROR: couldn't find regpkdb file (%s)\n",
		    strerror(errno));
		exit(EXIT_FAILURE);
	}

	in_chroot_env = getenv("in_chroot");
	if (in_chroot_env != NULL)
		in_chroot = true;

	if (strcasecmp(argv[0], "register") == 0) {
		/* Registers a package into the database */
		if (argc != 4)
			usage();

		dict = prop_dictionary_create();
		if (dict == NULL)
			exit(EXIT_FAILURE);
		prop_dictionary_set_cstring_nocopy(dict, "pkgname", argv[1]);
		prop_dictionary_set_cstring_nocopy(dict, "version", argv[2]);
		prop_dictionary_set_cstring_nocopy(dict, "short_desc", argv[3]);

		rv = xbps_register_pkg(dict, false, automatic);
		if (rv == EEXIST) {
			printf("%s=> %s-%s already registered.\n",
			    in_chroot ? "[chroot] " : "", argv[1], argv[2]);
		} else if (rv != 0) {
			printf("%s=> couldn't register %s-%s (%s).\n",
			    in_chroot ? "[chroot] " : "" , argv[1], argv[2],
			    strerror(rv));
		} else {
			printf("%s=> %s-%s registered successfully.\n",
			    in_chroot ? "[chroot] " : "", argv[1], argv[2]);
		}

	} else if (strcasecmp(argv[0], "unregister") == 0) {
		/* Unregisters a package from the database */
		if (argc != 3)
			usage();

		rv = xbps_remove_pkg_dict_from_file(argv[1], plist);
		if (rv == ENOENT) {
			printf("=> ERROR: %s not registered in database.\n",
			     argv[1]);
		} else if (rv != 0) {
			printf("=> ERROR: couldn't unregister %s "
			    "from database (%s)\n", argv[1], strerror(rv));
			exit(EXIT_FAILURE);
		}

		printf("%s=> %s-%s unregistered successfully.\n",
		    in_chroot ? "[chroot] " : "", argv[1], argv[2]);

	} else if (strcasecmp(argv[0], "version") == 0) {
		/* Prints version of an installed package */
		if (argc != 2)
			usage();

		dict = xbps_find_pkg_from_plist(plist, argv[1]);
		if (dict == NULL)
			exit(EXIT_FAILURE);

		if (!prop_dictionary_get_cstring_nocopy(dict, "version",
		    &version))
			exit(EXIT_FAILURE);

		printf("%s\n", version);
		prop_object_release(dict);

	} else if (strcasecmp(argv[0], "sanitize-plist") == 0) {
		/* Sanitize a plist file (properly indent the file) */
		if (argc != 2)
			usage();

		dict = prop_dictionary_internalize_from_file(argv[1]);
		if (dict == NULL) {
			printf("=> ERROR: couldn't sanitize %s plist file "
			    "(%s)\n", argv[1], strerror(errno));
			exit(EXIT_FAILURE);
		}
		write_plist_file(dict, argv[1]);

	} else if (strcasecmp(argv[0], "getpkgversion") == 0) {
		/* Returns the version of a pkg string */
		if (argc != 2)
			usage();

		version = xbps_get_pkg_version(argv[1]);
		if (version == NULL) {
			printf("Invalid string, expected <string>-<version>\n");
			exit(EXIT_FAILURE);
		}
		printf("%s\n", version);

	} else if (strcasecmp(argv[0], "getpkgname") == 0) {
		/* Returns the name of a pkg string */
		if (argc != 2)
			usage();

		pkgname = xbps_get_pkg_name(argv[1]);
		if (pkgname == NULL) {
			printf("Invalid string, expected <string>-<version>\n");
			exit(EXIT_FAILURE);
		}
		printf("%s\n", pkgname);
		free(pkgname);

	} else if (strcasecmp(argv[0], "getpkgrevision") == 0) {
		/* Returns the revision of a pkg string */
		if (argc != 2)
			usage();

		version = xbps_get_pkg_revision(argv[1]);
		if (version == NULL)
			exit(EXIT_SUCCESS);

		printf("%s\n", version);

	} else {
		usage();
	}

	exit(EXIT_SUCCESS);
}