/*-
 * Copyright (c) 2008-2010 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 <signal.h>
#include <assert.h>
#include <unistd.h>

#include <xbps_api.h>
#include "strlcpy.h"
#include "defs.h"
#include "../xbps-repo/defs.h"

struct list_pkgver_cb {
	pkg_state_t state;
	size_t pkgver_len;
};

static void __attribute__((noreturn))
usage(void)
{
	fprintf(stderr,
	    "Usage: xbps-bin [options] [target] [arguments]\n"
	    "See xbps-bin(8) for more information.\n");
	exit(EXIT_FAILURE);
}

static int
list_pkgs_in_dict(prop_object_t obj, void *arg, bool *loop_done)
{
	struct list_pkgver_cb *lpc = arg;
	const char *pkgver, *short_desc;
	char *tmp = NULL;
	pkg_state_t curstate, *wantstate = &lpc->state;
	size_t i = 0;

	(void)loop_done;

	assert(prop_object_type(obj) == PROP_TYPE_DICTIONARY);

	if (wantstate && *wantstate != 0) {
		if (xbps_get_pkg_state_dictionary(obj, &curstate))
			return EINVAL;

		if (curstate != *wantstate)
			return 0;
	}

	prop_dictionary_get_cstring_nocopy(obj, "pkgver", &pkgver);
	prop_dictionary_get_cstring_nocopy(obj, "short_desc", &short_desc);
	if (!pkgver && !short_desc)
		return EINVAL;

	tmp = calloc(1, lpc->pkgver_len + 1);
	if (tmp == NULL)
		return errno;

	strlcpy(tmp, pkgver, lpc->pkgver_len + 1);
	for (i = strlen(tmp); i < lpc->pkgver_len; i++)
		tmp[i] = ' ';

	printf("%s %s\n", tmp, short_desc);
	free(tmp);

	return 0;
}

static int
list_manual_packages(prop_object_t obj, void *arg, bool *loop_done)
{
	const char *pkgver;
	bool automatic = false;

	(void)arg;
	(void)loop_done;

	prop_dictionary_get_bool(obj, "automatic-install", &automatic);
	if (automatic == false) {
		prop_dictionary_get_cstring_nocopy(obj, "pkgver", &pkgver);
		printf("%s\n", pkgver);
	}

	return 0;
}

static int
show_orphans(void)
{
	prop_array_t orphans;
	prop_object_iterator_t iter;
	prop_object_t obj;
	const char *pkgver;

	orphans = xbps_find_orphan_packages();
	if (orphans == NULL)
		return EINVAL;

	if (prop_array_count(orphans) == 0)
		return 0;

	iter = prop_array_iterator(orphans);
	if (iter == NULL)
		return ENOMEM;

	while ((obj = prop_object_iterator_next(iter)) != NULL) {
		prop_dictionary_get_cstring_nocopy(obj, "pkgver", &pkgver);
		printf("%s\n", pkgver);
	}
	prop_object_iterator_release(iter);

	return 0;
}

static void __attribute__((noreturn))
cleanup(int signum)
{
	xbps_end();
	exit(signum);
}

int
main(int argc, char **argv)
{
	prop_dictionary_t dict;
	struct list_pkgver_cb lpc;
	struct sigaction sa;
	int i , c, flags, rv;
	bool yes, purge, with_debug, force_rm_with_deps;

	i = c = flags = rv = 0;
	yes = purge = force_rm_with_deps = with_debug = false;

	while ((c = getopt(argc, argv, "VcdFfpr:vy")) != -1) {
		switch (c) {
		case 'c':
			xbps_set_cachedir(optarg);
			break;
		case 'd':
			with_debug = true;
			break;
		case 'F':
			force_rm_with_deps = true;
			break;
		case 'f':
			flags |= XBPS_FLAG_FORCE;
			break;
		case 'p':
			purge = true;
			break;
		case 'r':
			/* To specify the root directory */
			xbps_set_rootdir(optarg);
			break;
		case 'v':
			flags |= XBPS_FLAG_VERBOSE;
			break;
		case 'V':
			printf("%s\n", XBPS_RELVER);
			exit(EXIT_SUCCESS);
		case 'y':
			yes = true;
			break;
		case '?':
		default:
			usage();
		}
	}

	argc -= optind;
	argv += optind;

	if (argc < 1)
		usage();

	if (flags != 0)
		xbps_set_flags(flags);

	/*
	 * Register a signal handler to clean up resources used by libxbps.
	 */
	memset(&sa, 0, sizeof(sa));
	sa.sa_handler = cleanup;
	sigaction(SIGINT, &sa, NULL);
	sigaction(SIGTERM, &sa, NULL);
	sigaction(SIGQUIT, &sa, NULL);

	/*
	 * Initialize stuff for libxbps.
	 */
	xbps_init(with_debug);

	if ((dict = xbps_regpkgdb_dictionary_get()) == NULL) {
		if (errno && errno != ENOENT) {
			fprintf(stderr,
			    "E: couldn't initialize regpkgdb dict: %s\n",
			    strerror(errno));
			goto out;
		}
	}

	if ((rv = xbps_repository_pool_init()) != 0) {
		if (rv != ENOENT) {
			fprintf(stderr,
			    "E: couldn't initialize repository pool: %s\n",
			    strerror(rv));
			goto out;
		}
	}

	if (strcasecmp(argv[0], "list") == 0) {
		/* Lists packages currently registered in database. */
		if (argc < 1 || argc > 2)
			usage();

		if (dict == NULL) {
			printf("No packages currently installed.\n");
			goto out;
		}

		lpc.state = 0;
		if (argv[1]) {
			if (strcmp(argv[1], "installed") == 0)
				lpc.state = XBPS_PKG_STATE_INSTALLED;
			else if (strcmp(argv[1], "unpacked") == 0)
				lpc.state = XBPS_PKG_STATE_UNPACKED;
			else if (strcmp(argv[1], "config-files") == 0)
				lpc.state = XBPS_PKG_STATE_CONFIG_FILES;
			else {
				fprintf(stderr,
				    "E: invalid state `%s'. Accepted values: "
				    "config-files, unpacked, "
				    "installed [default]\n", argv[1]);
				rv = -1;
				goto out;
			}

		}
		/*
		 * Find the longest pkgver string to pretty print the output.
		 */
		lpc.pkgver_len = find_longest_pkgver(dict);
		rv = xbps_callback_array_iter_in_dict(dict, "packages",
		    list_pkgs_in_dict, &lpc);

	} else if (strcasecmp(argv[0], "install") == 0) {
		/* Installs a binary package and required deps. */
		if (argc < 2)
			usage();

		for (i = 1; i < argc; i++)
			if ((rv = xbps_install_new_pkg(argv[i])) != 0)
				goto out;

		rv = xbps_exec_transaction(yes);

	} else if (strcasecmp(argv[0], "update") == 0) {
		/* Update an installed package. */
		if (argc < 2)
			usage();

		for (i = 1; i < argc; i++)
			if ((rv = xbps_update_pkg(argv[i])) != 0)
				goto out;

		rv = xbps_exec_transaction(yes);

	} else if (strcasecmp(argv[0], "remove") == 0) {
		/* Removes a binary package. */
		if (argc < 2)
			usage();

		rv = xbps_remove_installed_pkgs(argc, argv, yes, purge,
		    force_rm_with_deps);

	} else if (strcasecmp(argv[0], "show") == 0) {
		/* Shows info about an installed binary package. */
		if (argc != 2)
			usage();

		rv = show_pkg_info_from_metadir(argv[1]);
		if (rv != 0) {
			printf("Package %s not installed.\n", argv[1]);
			goto out;
		}

	} else if (strcasecmp(argv[0], "show-files") == 0) {
		/* Shows files installed by a binary package. */
		if (argc != 2)
			usage();

		rv = show_pkg_files_from_metadir(argv[1]);
		if (rv != 0) {
			printf("Package %s not installed.\n", argv[1]);
			goto out;
		}

	} else if (strcasecmp(argv[0], "check") == 0) {
		/* Checks the integrity of an installed package. */
		if (argc != 2)
			usage();

		if (strcasecmp(argv[1], "all") == 0)
			rv = xbps_check_pkg_integrity_all();
		else
			rv = xbps_check_pkg_integrity(argv[1]);

	} else if (strcasecmp(argv[0], "autoupdate") == 0) {
		/*
		 * To update all packages currently installed.
		 */
		if (argc != 1)
			usage();

		rv = xbps_autoupdate_pkgs(yes);

	} else if (strcasecmp(argv[0], "show-orphans") == 0) {
		/*
		 * Only show the package name of all currently package
		 * orphans.
		 */
		if (argc != 1)
			usage();

		rv = show_orphans();

	} else if (strcasecmp(argv[0], "autoremove") == 0) {
		/*
		 * Removes orphan pkgs. These packages were installed
		 * as dependency and any installed package does not depend
		 * on it currently.
		 */
		if (argc != 1)
			usage();

		rv = xbps_autoremove_pkgs(yes, purge);

	} else if (strcasecmp(argv[0], "purge") == 0) {
		/*
		 * Purge a package completely.
		 */
		if (argc != 2)
			usage();

		if (strcasecmp(argv[1], "all") == 0)
			rv = xbps_purge_all_pkgs();
		else
			rv = xbps_purge_pkg(argv[1], true);

	} else if (strcasecmp(argv[0], "reconfigure") == 0) {
		/*
		 * Reconfigure a package.
		 */
		if (argc != 2)
			usage();

		if (strcasecmp(argv[1], "all") == 0)
			rv = xbps_configure_all_pkgs();
		else
			rv = xbps_configure_pkg(argv[1], NULL, true, false);

	} else if (strcasecmp(argv[0], "show-deps") == 0) {
		/*
		 * Show dependencies for a package.
		 */
		if (argc != 2)
			usage();

		rv = xbps_show_pkg_deps(argv[1]);

	} else if (strcasecmp(argv[0], "list-manual") == 0) {
		/*
		 * List packages that were installed manually, not as
		 * dependencies.
		 */
		if (argc != 1)
			usage();

		rv = xbps_callback_array_iter_in_dict(dict, "packages",
		    list_manual_packages, NULL);

	} else if (strcasecmp(argv[0], "show-revdeps") == 0) {
		/*
		 * Show reverse dependencies for a package.
		 */
		if (argc != 2)
			usage();

		rv = xbps_show_pkg_reverse_deps(argv[1]);

	} else if (strcasecmp(argv[0], "find-files") == 0) {
		/*
		 * Find files matched by a pattern from installed
		 * packages.
		 */
		if (argc != 2)
			usage();

		rv = find_files_in_packages(argv[1]);

	} else {
		usage();
	}

out:
	cleanup(rv);
}