/*
   Copyright 2005-2010 Jakub Kruszona-Zawadzki, Gemius SA, 2013-2014 EditShare,
   2013-2016 Skytechnology sp. z o.o..

   This file was part of MooseFS and is part of LizardFS.

   LizardFS 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, version 3.

   LizardFS 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 LizardFS. If not, see <http://www.gnu.org/licenses/>.
 */

#include "common/platform.h"

#include <stdio.h>
#include <stdlib.h>

#include "common/server_connection.h"
#include "protocol/cltoma.h"
#include "protocol/matocl.h"
#include "tools/tools_commands.h"
#include "tools/tools_common_functions.h"

static int kDefaultTimeout = 30 * 1000;
static int kInfiniteTimeout = 10 * 24 * 3600 * 1000; // simulate infinite timeout (10 days)

static void set_goal_usage() {
	fprintf(stderr,
	        "set objects goal (desired number of copies)\n\nusage:\n lizardfs setgoal [-l] GOAL name "
	        "[name ...]\n");
	print_numberformat_options();
	print_recursive_option();
	fprintf(stderr, " -l - wait until setgoal will finish (otherwise there is 30s timeout)\n");
	fprintf(stderr, " GOAL - set goal to given goal name\n");
}

static int set_goal(const char *fname, const std::string &goal, uint8_t mode, int long_wait) {
	uint32_t inode;
	int fd;
	uint32_t messageId = 0;
	uint32_t uid = getuid();
	fd = open_master_conn(fname, &inode, NULL, 0, 1);
	if (fd < 0) {
		return -1;
	}
	try {
		auto request = cltoma::fuseSetGoal::build(messageId, inode, uid, goal, mode);
		auto response = ServerConnection::sendAndReceive(fd, request, LIZ_MATOCL_FUSE_SETGOAL,
		                    ServerConnection::ReceiveMode::kReceiveFirstNonNopMessage,
		                    long_wait ? kInfiniteTimeout : kDefaultTimeout);
		uint32_t changed;
		uint32_t notChanged;
		uint32_t notPermitted;
		PacketVersion version;

		deserializePacketVersionNoHeader(response, version);
		if (version == matocl::fuseSetGoal::kStatusPacketVersion) {
			uint8_t status;
			matocl::fuseSetGoal::deserialize(response, messageId, status);
			throw Exception(std::string(fname) + ": failed", status);
		}
		matocl::fuseSetGoal::deserialize(response, messageId, changed, notChanged, notPermitted);

		if ((mode & SMODE_RMASK) == 0) {
			if (changed || mode == SMODE_SET) {
				printf("%s: %s\n", fname, goal.c_str());
			} else {
				printf("%s: goal not changed\n", fname);
			}
		} else {
			printf("%s:\n", fname);
			print_number(" inodes with goal changed:      ", "\n", changed, 1, 0, 1);
			print_number(" inodes with goal not changed:  ", "\n", notChanged, 1, 0, 1);
			print_number(" inodes with permission denied: ", "\n", notPermitted, 1, 0, 1);
		}
	} catch (Exception &e) {
		fprintf(stderr, "%s\n", e.what());
		close_master_conn(1);
		return -1;
	}
	close_master_conn(0);
	return 0;
}

static int gene_set_goal_run(int argc, char **argv, int rflag) {
	int ch, status;
	std::string goal;
	int long_wait = 0;

	while ((ch = getopt(argc, argv, "rnhHl")) != -1) {
		switch (ch) {
		case 'n':
			humode = 0;
			break;
		case 'h':
			humode = 1;
			break;
		case 'H':
			humode = 2;
			break;
		case 'r':
			rflag = 1;
			break;
		case 'l':
			long_wait = 1;
			break;
		}
	}
	argc -= optind;
	argv += optind;

	if (argc == 0) {
		set_goal_usage();
		return 1;
	}

	goal = argv[0];
	if (!goal.empty() && (goal.back() == '-' || goal.back() == '+')) {
		fprintf(stderr, "setgoal doesn't support +/- modifiers anymore\n");
		set_goal_usage();
		return 1;
	}
	argc--;
	argv++;

	if (argc < 1) {
		set_goal_usage();
		return 1;
	}
	status = 0;
	while (argc > 0) {
		if (set_goal(*argv, goal, (rflag) ? (SMODE_SET | SMODE_RMASK) : SMODE_SET, long_wait) < 0) {
			status = 1;
		}
		argc--;
		argv++;
	}
	return status;
}

int rset_goal_run(int argc, char **argv) {
	return gene_set_goal_run(argc, argv, 1);
}
int set_goal_run(int argc, char **argv) {
	return gene_set_goal_run(argc, argv, 0);
}
