/*

 * Copyright (C) 2008  Kristian Høgsberg <krh@redhat.com>

 * Copyright (C) 2008  Red Hat, Inc

 *

 * 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.,

 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

 */

#include <stdlib.h>

#include <stddef.h>

#include <stdio.h>

#include <stdint.h>

#include <string.h>

#include <sys/stat.h>

#include <unistd.h>

#include <fcntl.h>

#include <dirent.h>

#include <curl/curl.h>

#include <fnmatch.h>

#include <errno.h>

#include "razor.h"

static const char system_repo_filename[] = "system.repo";

static const char next_repo_filename[] = "system-next.repo";

static const char rawhide_repo_filename[] = "rawhide.repo";

static const char updated_repo_filename[] = "system-updated.repo";

static const char install_root[] = "install";

static const char *repo_filename = system_repo_filename;

static const char *yum_url;

static int

command_list(int argc, const char *argv[])

{

	struct razor_set *set;

	struct razor_package_iterator *pi;

	struct razor_package *package;

	const char *pattern, *name, *version, *arch;

	int only_names = 0, i = 0;

	if (i < argc && strcmp(argv[i], "--only-names") == 0) {

		only_names = 1;

		i++;

	}

	pattern = argv[i];

	set = razor_set_open(repo_filename);

	pi = razor_package_iterator_create(set);

	while (razor_package_iterator_next(pi, &package,

					   &name, &version, &arch)) {

		if (pattern && fnmatch(pattern, name, 0) != 0)

			continue;

		if (only_names)

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

		else

			printf("%s-%s.%s\n", name, version, arch);

	}

	razor_package_iterator_destroy(pi);

	razor_set_destroy(set);

	return 0;

}

static int

list_properties(const char *package_name,

		enum razor_property_type required_type)

{

	static const char *relation_string[] = { "<", "<=", "=", ">=", ">" };

	struct razor_set *set;

	struct razor_property *property;

	struct razor_package *package;

	struct razor_property_iterator *pi;

	const char *name, *version;

	enum razor_property_type type;

	enum razor_version_relation relation;

	set = razor_set_open(repo_filename);

	if (package_name)

		package = razor_set_get_package(set, package_name);

	else

		package = NULL;

	pi = razor_property_iterator_create(set, package);

	while (razor_property_iterator_next(pi, &property,

					    &name, &relation, &version,

					    &type)) {

		if (type != required_type)

			continue;

		if (version[0] == '\0')

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

		else

			printf("%s %s %s\n", name,

			       relation_string[relation], version);

	}

	razor_property_iterator_destroy(pi);

	razor_set_destroy(set);

	return 0;

}

static int

command_list_requires(int argc, const char *argv[])

{

	return list_properties(argv[0], RAZOR_PROPERTY_REQUIRES);

}

static int

command_list_provides(int argc, const char *argv[])

{

	return list_properties(argv[0], RAZOR_PROPERTY_PROVIDES);

}

static int

command_list_obsoletes(int argc, const char *argv[])

{

	return list_properties(argv[0], RAZOR_PROPERTY_OBSOLETES);

}

static int

command_list_conflicts(int argc, const char *argv[])

{

	return list_properties(argv[0], RAZOR_PROPERTY_CONFLICTS);

}

static int

command_list_files(int argc, const char *argv[])

{

	struct razor_set *set;

	set = razor_set_open(repo_filename);

	if (set == NULL)

		return 1;

	razor_set_list_files(set, argv[0]);

	razor_set_destroy(set);

	return 0;

}

static int

command_list_file_packages(int argc, const char *argv[])

{

	struct razor_set *set;

	struct razor_package_iterator *pi;

	struct razor_package *package;

	const char *name, *version, *arch;

	set = razor_set_open(repo_filename);

	if (set == NULL)

		return 1;

	pi = razor_package_iterator_create_for_file(set, argv[0]);

	while (razor_package_iterator_next(pi, &package,

					   &name, &version, &arch))

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

	razor_package_iterator_destroy(pi);

	razor_set_destroy(set);

	return 0;

}

static int

command_list_package_files(int argc, const char *argv[])

{

	struct razor_set *set;

	set = razor_set_open(repo_filename);

	if (set == NULL)

		return 1;

	razor_set_list_package_files(set, argv[0]);

	razor_set_destroy(set);

	return 0;

}

static void

list_packages_for_property(struct razor_set *set,

			   struct razor_property *property)

{

	struct razor_package_iterator *pi;

	struct razor_package *package;

	const char *name, *version, *arch;

	pi = razor_package_iterator_create_for_property(set, property);

	while (razor_package_iterator_next(pi, &package,

					   &name, &version, &arch))

		printf("%s-%s.%s\n", name, version, arch);

	razor_package_iterator_destroy(pi);

}

static int

list_property_packages(const char *ref_name,

		       const char *ref_version,

		       enum razor_property_type ref_type)

{

	struct razor_set *set;

	struct razor_property *property;

	struct razor_property_iterator *pi;

	const char *name, *version;

	enum razor_property_type type;

	enum razor_version_relation relation;

	if (ref_name == NULL)

		return 0;

	set = razor_set_open(repo_filename);

	if (set == NULL)

		return 1;

	pi = razor_property_iterator_create(set, NULL);

	while (razor_property_iterator_next(pi, &property,

					    &name, &relation, &version,

					    &type)) {

		if (strcmp(ref_name, name) != 0)

			continue;

		if (ref_version && relation == RAZOR_VERSION_EQUAL &&

		    strcmp(ref_version, version) != 0)

			continue;

		if (ref_type != type)

			continue;

		list_packages_for_property(set, property);

	}

	razor_property_iterator_destroy(pi);

	return 0;

}

static int

command_what_requires(int argc, const char *argv[])

{

	return list_property_packages(argv[0], argv[1],

				      RAZOR_PROPERTY_REQUIRES);

}

static int

command_what_provides(int argc, const char *argv[])

{

	return list_property_packages(argv[0], argv[1],

				      RAZOR_PROPERTY_PROVIDES);

}

static int

show_progress(void *clientp,

	      double dltotal, double dlnow, double ultotal, double ulnow)

{

	const char *file = clientp;

	if (!dlnow < dltotal)

		fprintf(stderr, "\rdownloading %s, %dkB/%dkB",

			file, (int) dlnow / 1024, (int) dltotal / 1024);

	return 0;

}

static int

download_if_missing(const char *url, const char *file)

{

	CURL *curl;

	struct stat buf;

	char error[256];

	FILE *fp;

	CURLcode res;

	long response;

	curl = curl_easy_init();

	if (curl == NULL)

		return 1;

	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, error);

	curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0);

	curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, show_progress);

	curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, file);

	if (stat(file, &buf) < 0) {

		fp = fopen(file, "w");

		if (fp == NULL) {

			fprintf(stderr,

				"failed to open %s for writing\n", file);

			return -1;

		}

		curl_easy_setopt(curl, CURLOPT_WRITEDATA, fp);

		curl_easy_setopt(curl, CURLOPT_URL, url);

		res = curl_easy_perform(curl);

		fclose(fp);

		if (res != CURLE_OK) {

			fprintf(stderr, "curl error: %s\n", error);

			unlink(file);

			return -1;

		}

		res = curl_easy_getinfo(curl,

					CURLINFO_RESPONSE_CODE, &response);

		if (res != CURLE_OK) {

			fprintf(stderr, "curl error: %s\n", error);

                        unlink(file);

                        return -1;

		}

		if (response != 200) {

			fprintf(stderr, " - failed %ld\n", response);

                        unlink(file);

                        return -1;

		}

		fprintf(stderr, "\n");

	}

	curl_easy_cleanup(curl);

	return 0;

}

#define YUM_URL "http://download.fedora.redhat.com" \

	"/pub/fedora/linux/development/i386/os"

static int

command_import_yum(int argc, const char *argv[])

{

	struct razor_set *set;

	char buffer[512];

	printf("downloading from %s.\n", yum_url);

	snprintf(buffer, sizeof buffer,

		 "%s/repodata/primary.xml.gz", yum_url);

	if (download_if_missing(buffer, "primary.xml.gz") < 0)

		return -1;

	snprintf(buffer, sizeof buffer,

		 "%s/repodata/filelists.xml.gz", yum_url);

	if (download_if_missing(buffer, "filelists.xml.gz") < 0)

		return -1;

	set = razor_set_create_from_yum();

	if (set == NULL)

		return 1;

	razor_set_write(set, rawhide_repo_filename);

	razor_set_destroy(set);

	printf("wrote %s\n", rawhide_repo_filename);

	return 0;

}

static int

command_import_rpmdb(int argc, const char *argv[])

{

	struct razor_set *set;

	set = razor_set_create_from_rpmdb();

	if (set == NULL)

		return 1;

	razor_set_write(set, repo_filename);

	razor_set_destroy(set);

	printf("wrote %s\n", repo_filename);

	return 0;

}

static int

mark_packages_for_update(struct razor_transaction *trans,

			 struct razor_set *set, const char *pattern)

{

	struct razor_package_iterator *pi;

	struct razor_package *package;

	const char *name, *version, *arch;

	int matches = 0;

	pi = razor_package_iterator_create(set);

	while (razor_package_iterator_next(pi, &package,

					   &name, &version, &arch)) {

		if (pattern && fnmatch(pattern, name, 0) == 0) {

			razor_transaction_update_package(trans, package);

			matches++;

		}

	}

	razor_package_iterator_destroy(pi);

	return matches;

}

static int

mark_packages_for_removal(struct razor_transaction *trans,

			  struct razor_set *set, const char *pattern)

{

	struct razor_package_iterator *pi;

	struct razor_package *package;

	const char *name, *version, *arch;

	int matches = 0;

	pi = razor_package_iterator_create(set);

	while (razor_package_iterator_next(pi, &package,

					   &name, &version, &arch)) {

		if (pattern && fnmatch(pattern, name, 0) == 0) {

			razor_transaction_remove_package(trans, package);

			matches++;

		}

	}

	razor_package_iterator_destroy(pi);

	return matches;

}

static int

command_update(int argc, const char *argv[])

{

	struct razor_set *set, *upstream;

	struct razor_transaction *trans;

	int i, errors;

	set = razor_set_open(repo_filename);

	upstream = razor_set_open(rawhide_repo_filename);

	if (set == NULL || upstream == NULL)

		return 1;

	trans = razor_transaction_create(set, upstream);

	if (argc == 0)

		razor_transaction_update_all(trans);

	for (i = 0; i < argc; i++) {

		if (mark_packages_for_update(trans, set, argv[i]) == 0) {

			fprintf(stderr, "no match for %s\n", argv[i]);

			return 1;

		}

	}

	errors = razor_transaction_resolve(trans);

	if (errors)

		return 1;

	set = razor_transaction_finish(trans);

	razor_set_write(set, updated_repo_filename);

	razor_set_destroy(set);

	razor_set_destroy(upstream);

	printf("wrote system-updated.repo\n");

	return 0;

}

static int

command_remove(int argc, const char *argv[])

{

	struct razor_set *set, *upstream;

	struct razor_transaction *trans;

	int i, errors;

	set = razor_set_open(repo_filename);

	if (set == NULL)

		return 1;

	upstream = razor_set_create();

	trans = razor_transaction_create(set, upstream);

	for (i = 0; i < argc; i++) {

		if (mark_packages_for_removal(trans, set, argv[i]) == 0) {

			fprintf(stderr, "no match for %s\n", argv[i]);

			return 1;

		}

	}

	errors = razor_transaction_resolve(trans);

	if (errors)

		return 1;

	set = razor_transaction_finish(trans);

	razor_set_write(set, updated_repo_filename);

	razor_set_destroy(set);

	razor_set_destroy(upstream);

	printf("wrote system-updated.repo\n");

	return 0;

}

static void

print_diff(const char *name,

	   const char *old_version, const char *new_version, const char *arch,

	   void *data)

{

	if (old_version)

		printf("removing %s %s\n", name, old_version);

	else

		printf("install %s %s\n", name, new_version);

}

static int

command_diff(int argc, const char *argv[])

{

	struct razor_set *set, *updated;

	set = razor_set_open(repo_filename);

	updated = razor_set_open(updated_repo_filename);

	if (set == NULL || updated == NULL)

		return 1;

	razor_set_diff(set, updated, print_diff, NULL);

	razor_set_destroy(set);

	razor_set_destroy(updated);

	return 0;

}

static int

command_import_rpms(int argc, const char *argv[])

{

	DIR *dir;

	struct dirent *de;

	struct razor_importer *importer;

	struct razor_set *set;

	struct razor_rpm *rpm;

	int len;

	char filename[256];

	const char *dirname = argv[0];

	if (dirname == NULL) {

		fprintf(stderr, "usage: razor import-rpms DIR\n");

		return -1;

	}

	dir = opendir(dirname);

	if (dir == NULL) {

		fprintf(stderr, "couldn't read dir %s\n", dirname);

		return -1;

	}

	importer = razor_importer_new();

	while (de = readdir(dir), de != NULL) {

		len = strlen(de->d_name);

		if (len < 5 || strcmp(de->d_name + len - 4, ".rpm") != 0)

		    continue;

		snprintf(filename, sizeof filename,

			 "%s/%s", dirname, de->d_name);

		rpm = razor_rpm_open(filename);

		if (rpm == NULL) {

			fprintf(stderr,

				"failed to open rpm \"%s\"\n", filename);

			continue;

		}

		if (razor_importer_add_rpm(importer, rpm)) {

			fprintf(stderr, "couldn't import %s\n", filename);

			break;

		}

		razor_rpm_close(rpm);

	}

	if (de != NULL) {

		razor_importer_destroy(importer);

		return -1;

	}

	set = razor_importer_finish(importer);

	razor_set_write(set, repo_filename);

	razor_set_destroy(set);

	printf("wrote %s\n", repo_filename);

	return 0;

}

static void

download_package(const char *name,

		 const char *old_version,

		 const char *new_version,

		 const char *arch,

		 void *data)

{

	char file[PATH_MAX], url[256];

	const char *v;

	int *errors = data;

	if (old_version)

		return;

	/* Skip epoch */

	v = strchr(new_version, ':');

	if (v != NULL)

		v = v + 1;

	else

		v = new_version;

	snprintf(url, sizeof url,

		 "%s/Packages/%s-%s.%s.rpm", yum_url, name, v, arch);

	snprintf(file, sizeof file,

		 "rpms/%s-%s.%s.rpm", name, v, arch);

	if (download_if_missing(url, file) < 0)

		(*errors)++;

}

static void

install_package(const char *name,

		const char *old_version,

		const char *new_version,

		const char *arch,

		void *data)

{

	const char *v, *root = data;

	char file[PATH_MAX];

	struct razor_rpm *rpm;

	if (old_version) {

		printf("removing %s %s not handled\n", name, old_version);

		return;

	}

	/* Skip epoch */

	v = strchr(new_version, ':');

	if (v != NULL)

		v = v + 1;

	else

		v = new_version;

	printf("install %s %s\n", name, v);

	snprintf(file, sizeof file, "rpms/%s-%s.%s.rpm", name, v, arch);

 	rpm = razor_rpm_open(file);

	if (rpm == NULL) {

		fprintf(stderr, "failed to open rpm %s\n", file);

		return;

	}

	if (razor_rpm_install(rpm, root) < 0) {

		fprintf(stderr,

			"failed to install rpm %s\n", file);

		return;

	}

	razor_rpm_close(rpm);

}

static int

command_install(int argc, const char *argv[])

{

	struct razor_root *root;

	struct razor_set *upstream, *next;

	struct razor_transaction *trans;

	int i = 0, errors, dependencies = 1;

	if (i < argc && strcmp(argv[i], "--no-dependencies") == 0) {

		dependencies = 0;

		i++;

	}

	root = razor_root_open(install_root, RAZOR_ROOT_OPEN_WRITE);

	upstream = razor_set_open(rawhide_repo_filename);

	trans = razor_root_create_transaction(root, upstream);

	for (; i < argc; i++) {

		if (mark_packages_for_update(trans, upstream, argv[i]) == 0) {

			fprintf(stderr, "no package matched %s\n", argv[i]);

			razor_root_close(root);

			return 1;

		}

	}

	if (dependencies) {

		errors = razor_transaction_resolve(trans);

		if (errors) {

			razor_root_close(root);

			return 1;

		}

	}

	next = razor_transaction_finish(trans);

	razor_root_update(root, next);

	if (mkdir("rpms", 0777) && errno != EEXIST) {

		fprintf(stderr, "failed to create rpms directory.\n");

		razor_root_close(root);

		return 1;

	}

	razor_root_diff(root, download_package, &errors);

	if (errors > 0) {

		fprintf(stderr, "failed to download %d packages\n", errors);

		razor_root_close(root);

                return 1;

        }

	/* FIXME: We need to figure out the right install order here,

	 * so the post and pre scripts can run. */

	razor_root_diff(root, install_package, (void *) root);

	razor_set_destroy(next);

	razor_set_destroy(upstream);

	return razor_root_commit(root);

}

static int

command_init(int argc, const char *argv[])

{

	return razor_root_create(install_root);

}

static int

command_download(int argc, const char *argv[])

{

	struct razor_set *set;

	struct razor_package_iterator *pi;

	struct razor_package *package;

	const char *pattern = argv[0], *name, *version, *arch;

	char url[256], file[256];

	int matches = 0;

	if (mkdir("rpms", 0777) && errno != EEXIST) {

		fprintf(stderr, "failed to create rpms directory.\n");

		return 1;

	}

	set = razor_set_open(rawhide_repo_filename);

	pi = razor_package_iterator_create(set);

	while (razor_package_iterator_next(pi, &package,

					   &name, &version, &arch)) {

		if (pattern && fnmatch(pattern, name, 0) != 0)

			continue;

		matches++;

		snprintf(url, sizeof url,

			 "%s/Packages/%s-%s.%s.rpm",

			 yum_url, name, version, arch);

		snprintf(file, sizeof file,

			 "rpms/%s-%s.%s.rpm", name, version, arch);

		download_if_missing(url, file);

	}

	razor_package_iterator_destroy(pi);

	razor_set_destroy(set);

	if (matches == 0)

		fprintf(stderr, "no packages matched \"%s\"\n", pattern);

	else if (matches == 1)

		fprintf(stderr, "downloaded 1 package\n");

	else

		fprintf(stderr, "downloaded %d packages\n", matches);

	return 0;

}

static struct {

	const char *name;

	const char *description;

	int (*func)(int argc, const char *argv[]);

} razor_commands[] = {

	{ "list", "list all packages", command_list },

	{ "list-requires", "list all requires for the given package", command_list_requires },

	{ "list-provides", "list all provides for the given package", command_list_provides },

	{ "list-obsoletes", "list all obsoletes for the given package", command_list_obsoletes },

	{ "list-conflicts", "list all conflicts for the given package", command_list_conflicts },

	{ "list-files", "list files for package set", command_list_files },

	{ "list-file-packages", "list packages owning file", command_list_file_packages },

	{ "list-package-files", "list files in package", command_list_package_files },

	{ "what-requires", "list the packages that have the given requires", command_what_requires },

	{ "what-provides", "list the packages that have the given provides", command_what_provides },

	{ "import-yum", "import yum metadata files", command_import_yum },

	{ "import-rpmdb", "import the system rpm database", command_import_rpmdb },

	{ "import-rpms", "import rpms from the given directory", command_import_rpms },

	{ "update", "update all or specified packages", command_update },

	{ "remove", "remove specified packages", command_remove },

	{ "diff", "show diff between two package sets", command_diff },

	{ "install", "install rpm", command_install },

	{ "init", "init razor root", command_init },

	{ "download", "download packages", command_download }

};

static int

usage(void)

{

	int i;

	printf("usage:\n");

	for (i = 0; i < ARRAY_SIZE(razor_commands); i++)

		printf("  %-20s%s\n",

		       razor_commands[i].name, razor_commands[i].description);

	return 1;

}

int

main(int argc, const char *argv[])

{

	char *repo;

	int i;

	repo = getenv("RAZOR_REPO");

	if (repo != NULL)

		repo_filename = repo;

	yum_url = getenv("YUM_URL");

	if (yum_url == NULL)

		yum_url = YUM_URL;

	if (argc < 2)

		return usage();

	for (i = 0; i < ARRAY_SIZE(razor_commands); i++)

		if (strcmp(razor_commands[i].name, argv[1]) == 0)

			return razor_commands[i].func(argc - 2, argv + 2);

	return usage();

}