/*****************************************************************************\
 *  create_res.c - reservation creation function for scontrol.
 *****************************************************************************
 *  Copyright (C) 2009 Lawrence Livermore National Security.
 *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
 *  Written by David Bremer <dbremer@llnl.gov>
 *  CODE-OCEC-09-009. All rights reserved.
 *
 *  This file is part of SLURM, a resource management program.
 *  For details, see <http://www.schedmd.com/slurmdocs/>.
 *  Please also read the included file: DISCLAIMER.
 *
 *  SLURM 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.
 *
 *  In addition, as a special exception, the copyright holders give permission
 *  to link the code of portions of this program with the OpenSSL library under
 *  certain conditions as described in each individual source file, and
 *  distribute linked combinations including the two. You must obey the GNU
 *  General Public License in all respects for all of the code used other than
 *  OpenSSL. If you modify file(s) with this exception, you may extend this
 *  exception to your version of the file(s), but you are not obligated to do
 *  so. If you do not wish to do so, delete this exception statement from your
 *  version.  If you delete this exception statement from all source files in
 *  the program, then also delete it here.
 *
 *  SLURM 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 SLURM; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA.
\*****************************************************************************/

#include "src/scontrol/scontrol.h"
#include "src/slurmctld/reservation.h"


/*
 *  _process_plus_minus is used to convert a string like
 *       Users+=a,b,c
 *  to   Users=+a,+b,+c
 */

static char * _process_plus_minus(char plus_or_minus, char *src)
{
	int num_commas = 0;
	int ii;
	int srclen = strlen(src);
	char *dst, *ret;

	for (ii=0; ii<srclen; ii++) {
		if (src[ii] == ',')
			num_commas++;
	}
	ret = dst = xmalloc(srclen + 2 + num_commas);

	*dst++ = plus_or_minus;
	for (ii=0; ii<srclen; ii++) {
		if (*src == ',') {
			*dst++ = *src++;
			*dst++ = plus_or_minus;
		} else {
			*dst++ = *src++;
		}
	}
	*dst = '\0';

	return ret;
}


/*
 *  _parse_flags  is used to parse the Flags= option.  It handles
 *  daily, weekly, static_alloc, and maint, optionally preceded by + or -,
 *  separated by a comma but no spaces.
 */
static uint32_t _parse_flags(const char *flagstr, const char *msg)
{
	int flip;
	uint32_t outflags = 0;
	const char *curr = flagstr;
	int taglen = 0;

	while (*curr != '\0') {
		flip = 0;
		if (*curr == '+') {
			curr++;
		} else if (*curr == '-') {
			flip = 1;
			curr++;
		}
		taglen = 0;
		while (curr[taglen] != ',' && curr[taglen] != '\0')
			taglen++;

		if (strncasecmp(curr, "Maintenance", MAX(taglen,1)) == 0) {
			curr += taglen;
			if (flip)
				outflags |= RESERVE_FLAG_NO_MAINT;
			else
				outflags |= RESERVE_FLAG_MAINT;
		} else if ((strncasecmp(curr, "Overlap", MAX(taglen,1))
			    == 0) && (!flip)) {
			curr += taglen;
			outflags |= RESERVE_FLAG_OVERLAP;
			/* "-OVERLAP" is not supported since that's the
			 * default behavior and the option only applies
			 * for reservation creation, not updates */
		} else if (strncasecmp(curr, "Ignore_Jobs", MAX(taglen,1))
			   == 0) {
			curr += taglen;
			if (flip)
				outflags |= RESERVE_FLAG_NO_IGN_JOB;
			else
				outflags |= RESERVE_FLAG_IGN_JOBS;
		} else if (strncasecmp(curr, "Daily", MAX(taglen,1)) == 0) {
			curr += taglen;
			if (flip)
				outflags |= RESERVE_FLAG_NO_DAILY;
			else
				outflags |= RESERVE_FLAG_DAILY;
		} else if (strncasecmp(curr, "Weekly", MAX(taglen,1)) == 0) {
			curr += taglen;
			if (flip)
				outflags |= RESERVE_FLAG_NO_WEEKLY;
			else
				outflags |= RESERVE_FLAG_WEEKLY;
		} else if (strncasecmp(curr, "License_Only", MAX(taglen,1))
			   == 0) {
			curr += taglen;
			if (flip)
				outflags |= RESERVE_FLAG_NO_LIC_ONLY;
			else
				outflags |= RESERVE_FLAG_LIC_ONLY;
		} else if (strncasecmp(curr, "Static_Alloc", MAX(taglen,1))
			   == 0) {
			curr += taglen;
			if (flip)
				outflags |= RESERVE_FLAG_NO_STATIC;
			else
				outflags |= RESERVE_FLAG_STATIC;
		} else {
			error("Error parsing flags %s.  %s", flagstr, msg);
			return 0xffffffff;
		}

		if (*curr == ',') {
			curr++;
		}
	}
	return outflags;
}


/*
 * scontrol_parse_res_options   parse options for creating or updating a
                                reservation
 * IN argc - count of arguments
 * IN argv - list of arguments
 * IN msg  - a string to append to any error message
 * OUT resv_msg_ptr - struct holding reservation parameters
 * OUT free_user_str - bool indicating that resv_msg_ptr->users should be freed
 * OUT free_acct_str - bool indicating that resv_msg_ptr->accounts should be
 *		       freed
 * RET 0 on success, -1 on err and prints message
 */
extern int
scontrol_parse_res_options(int argc, char *argv[], const char *msg,
			   resv_desc_msg_t  *resv_msg_ptr,
			   int *free_user_str, int *free_acct_str)
{
	int i;
	int duration = -3;   /* -1 == INFINITE, -2 == error, -3 == not set */

	*free_user_str = 0;
	*free_acct_str = 0;

	for (i=0; i<argc; i++) {
		char *tag = argv[i];
		int taglen = 0;
		char plus_minus = '\0';

		char *val = strchr(argv[i], '=');
		taglen = val - argv[i];

		if (!val && strncasecmp(argv[i], "res", 3) == 0) {
			continue;
		} else if (!val || taglen == 0) {
			exit_code = 1;
			error("Unknown parameter %s.  %s", argv[i], msg);
			return -1;
		}
		if (val[-1] == '+' || val[-1] == '-') {
			plus_minus = val[-1];
			taglen--;
		}
		val++;

		if (strncasecmp(tag, "ReservationName", MAX(taglen, 1)) == 0) {
			resv_msg_ptr->name = val;

		} else if (strncasecmp(tag, "StartTime", MAX(taglen, 1)) == 0){
			time_t  t = parse_time(val, 0);
			if (t == 0) {
				exit_code = 1;
				error("Invalid start time %s.  %s",
				      argv[i], msg);
				return -1;
			}
			resv_msg_ptr->start_time = t;

		} else if (strncasecmp(tag, "EndTime", MAX(taglen, 1)) == 0) {
			time_t  t = parse_time(val, 0);
			if (t == 0) {
				exit_code = 1;
				error("Invalid end time %s.  %s", argv[i],msg);
				return -1;
			}
			resv_msg_ptr->end_time = t;

		} else if (strncasecmp(tag, "Duration", MAX(taglen, 1)) == 0) {
			/* -1 == INFINITE, -2 == error, -3 == not set */
			duration = time_str2mins(val);
			if (duration < 0 && duration != INFINITE) {
				exit_code = 1;
				error("Invalid duration %s.  %s", argv[i],msg);
				return -1;
			}
			resv_msg_ptr->duration = (uint32_t)duration;

		} else if (strncasecmp(tag, "Flags", MAX(taglen, 2)) == 0) {
			uint32_t f;
			if (plus_minus) {
				char *tmp =
					_process_plus_minus(plus_minus, val);
				f = _parse_flags(tmp, msg);
				xfree(tmp);
			} else {
				f = _parse_flags(val, msg);
			}
			if (f == 0xffffffff) {
				return -1;
			} else {
				resv_msg_ptr->flags = f;
			}
		} else if (strncasecmp(tag, "NodeCnt", MAX(taglen,5)) == 0 ||
			   strncasecmp(tag, "NodeCount", MAX(taglen,5)) == 0) {
			char *endptr = NULL, *node_cnt, *tok, *ptrptr = NULL;
			int node_inx = 0;
			node_cnt = xstrdup(val);
			tok = strtok_r(node_cnt, ",", &ptrptr);
			while (tok) {
				xrealloc(resv_msg_ptr->node_cnt,
					 sizeof(uint32_t) * (node_inx + 2));
				resv_msg_ptr->node_cnt[node_inx] =
					strtol(tok, &endptr, 10);
				if ((endptr != NULL) &&
				    ((endptr[0] == 'k') ||
				     (endptr[0] == 'K'))) {
					resv_msg_ptr->node_cnt[node_inx] *=
						1024;
				} else if ((endptr != NULL) &&
					   ((endptr[0] == 'm') ||
					    (endptr[0] == 'M'))) {
					resv_msg_ptr->node_cnt[node_inx] *=
						1024 * 1024;
				} else if ((endptr == NULL) ||
					   (endptr[0] != '\0') ||
					   (tok[0] == '\0')) {
					exit_code = 1;
					error("Invalid node count %s.  %s",
					      argv[i], msg);
					xfree(node_cnt);
					return -1;
				}
				node_inx++;
				tok = strtok_r(NULL, ",", &ptrptr);
			}
			xfree(node_cnt);
		} else if (strncasecmp(tag, "Nodes", MAX(taglen, 5)) == 0) {
			resv_msg_ptr->node_list = val;

		} else if (strncasecmp(tag, "Features", MAX(taglen, 2)) == 0) {
			resv_msg_ptr->features = val;

		} else if (strncasecmp(tag, "Licenses", MAX(taglen, 2)) == 0) {
			resv_msg_ptr->licenses = val;

		} else if (strncasecmp(tag, "PartitionName", MAX(taglen, 1))
			   == 0) {
			resv_msg_ptr->partition = val;

		} else if (strncasecmp(tag, "Users", MAX(taglen, 1)) == 0) {
			if (plus_minus) {
				resv_msg_ptr->users =
					_process_plus_minus(plus_minus, val);
				*free_user_str = 1;
			} else {
				resv_msg_ptr->users = val;
			}
		} else if (strncasecmp(tag, "Accounts", MAX(taglen, 1)) == 0) {
			if (plus_minus) {
				resv_msg_ptr->accounts =
					_process_plus_minus(plus_minus, val);
				*free_acct_str = 1;
			} else {
				resv_msg_ptr->accounts = val;
			}
		} else if (strncasecmp(tag, "res", 3) == 0) {
			continue;
		} else {
			exit_code = 1;
			error("Unknown parameter %s.  %s", argv[i], msg);
			return -1;
		}
	}
	return 0;
}


/*
 * scontrol_update_res - update the slurm reservation configuration per the
 *     supplied arguments
 * IN argc - count of arguments
 * IN argv - list of arguments
 * RET 0 if no slurm error, errno otherwise. parsing error prints
 *     error message and returns 0.
 */
extern int
scontrol_update_res(int argc, char *argv[])
{
	resv_desc_msg_t   resv_msg;
	int err, ret = 0;
	int free_user_str = 0, free_acct_str = 0;

	slurm_init_resv_desc_msg (&resv_msg);
	err = scontrol_parse_res_options(argc, argv, "No reservation update.",
					 &resv_msg, &free_user_str,
					 &free_acct_str);
	if (err)
		goto SCONTROL_UPDATE_RES_CLEANUP;

	if (resv_msg.name == NULL) {
		exit_code = 1;
		error("Reservation must be given.  No reservation update.");
		goto SCONTROL_UPDATE_RES_CLEANUP;
	}

	err = slurm_update_reservation(&resv_msg);
	if (err) {
		exit_code = 1;
		slurm_perror("Error updating the reservation");
		ret = slurm_get_errno();
	} else {
		printf("Reservation updated.\n");
	}

SCONTROL_UPDATE_RES_CLEANUP:
	if (free_user_str)
		xfree(resv_msg.users);
	if (free_acct_str)
		xfree(resv_msg.accounts);
	return ret;
}


/*
 * Determine total node count for named partition.
 */
static uint32_t _partition_node_count(char *partition_name)
{
	int error_code, i;
	uint16_t show_flags = 0;
	uint32_t node_count = 0;
	partition_info_msg_t *part_info_ptr = NULL;
	partition_info_t *part_ptr = NULL;

	error_code = slurm_load_partitions((time_t) NULL,
					   &part_info_ptr, show_flags);
	if (error_code != SLURM_SUCCESS) {
		slurm_free_partition_info_msg (part_info_ptr);
		return NO_VAL;
	}

	part_ptr = part_info_ptr->partition_array;;
	for (i = 0; i < part_info_ptr->record_count; i++) {
		if (strcmp (partition_name, part_ptr[i].name))
			continue;
		node_count = part_ptr[i].total_nodes;
	}
	slurm_free_partition_info_msg (part_info_ptr);
	return node_count;
}


/*
 * scontrol_create_res - create the slurm reservation configuration per the
 *     supplied arguments
 * IN argc - count of arguments
 * IN argv - list of arguments
 * RET 0 if no slurm error, errno otherwise. parsing error prints
 *     error message and returns 0.
 */
extern int
scontrol_create_res(int argc, char *argv[])
{
	resv_desc_msg_t resv_msg;
	char *new_res_name = NULL;
	int free_user_str = 0, free_acct_str = 0;
	int free_node_cnt = 0;
	uint32_t node_count = 0;
	int err, ret = 0;

	slurm_init_resv_desc_msg (&resv_msg);
	err = scontrol_parse_res_options(argc, argv, "No reservation created.",
					 &resv_msg, &free_user_str,
					 &free_acct_str);
	if (err)
		goto SCONTROL_CREATE_RES_CLEANUP;

	if (resv_msg.start_time == (time_t)NO_VAL) {
		exit_code = 1;
		error("A start time must be given.  No reservation created.");
		goto SCONTROL_CREATE_RES_CLEANUP;
	}
	if (resv_msg.end_time == (time_t)NO_VAL &&
	    resv_msg.duration == (uint32_t)NO_VAL) {
		exit_code = 1;
		error("An end time or duration must be given.  "
		      "No reservation created.");
		goto SCONTROL_CREATE_RES_CLEANUP;
	}
	if (resv_msg.end_time != (time_t)NO_VAL &&
	    resv_msg.duration != (uint32_t)NO_VAL &&
            resv_msg.start_time + resv_msg.duration*60 != resv_msg.end_time) {
		exit_code = 1;
		error("StartTime + Duration does not equal EndTime.  "
		      "No reservation created.");
		goto SCONTROL_CREATE_RES_CLEANUP;
	}
	if (resv_msg.start_time > resv_msg.end_time &&
	    resv_msg.end_time != (time_t)NO_VAL) {
		exit_code = 1;
		error("Start time cannot be after end time.  "
		      "No reservation created.");
		goto SCONTROL_CREATE_RES_CLEANUP;
	}
	/*
	 * If "all" is specified for the nodes and a partition is specified,
	 * only allocate all of the nodes the partition.
	 */

	if ((resv_msg.partition != NULL) && (resv_msg.node_list != NULL) &&
	    (strcasecmp(resv_msg.node_list, "ALL") == 0)) {
		node_count = _partition_node_count(resv_msg.partition);
		if (node_count == NO_VAL) {
			exit_code = 1;
			error("Can not determine node count for partition. "
			      "No reservation created.");
			goto SCONTROL_CREATE_RES_CLEANUP;
		} else {
			free_node_cnt = 1;
			resv_msg.node_cnt = xmalloc(sizeof(uint32_t) * 2);
			*resv_msg.node_cnt = node_count;
			resv_msg.node_list = NULL;
		}
	}

	/*
	 * If  the following parameters are null, but a partition is named, then
	 * make the reservation for the whole partition.
	 */
	if ((resv_msg.node_cnt  == NULL || resv_msg.node_cnt[0]  == 0)    &&
	    (resv_msg.node_list == NULL || resv_msg.node_list[0] == '\0') &&
	    (resv_msg.licenses  == NULL || resv_msg.licenses[0]  == '\0')) {
		if (resv_msg.partition == NULL) {
			exit_code = 1;
			error("Nodes, NodeCnt or Licenses must be specified.  "
			      "No reservation created.");
			goto SCONTROL_CREATE_RES_CLEANUP;
		} else if ((node_count = _partition_node_count(resv_msg.partition))
			    == NO_VAL) {
			exit_code = 1;
			error("Can not determine node count for partition. "
			      "No reservation created.");
			goto SCONTROL_CREATE_RES_CLEANUP;
		} else {
			free_node_cnt = 1;
			resv_msg.node_cnt = xmalloc(sizeof(uint32_t) * 2);
			*resv_msg.node_cnt = node_count;
		}
	}
	if ((resv_msg.users == NULL    || resv_msg.users[0] == '\0') &&
	    (resv_msg.accounts == NULL || resv_msg.accounts[0] == '\0')) {
		exit_code = 1;
		error("Either Users or Accounts must be specified.  "
		      "No reservation created.");
		goto SCONTROL_CREATE_RES_CLEANUP;
	}

	new_res_name = slurm_create_reservation(&resv_msg);
	if (!new_res_name) {
		exit_code = 1;
		slurm_perror("Error creating the reservation");
		ret = slurm_get_errno();
	} else {
		printf("Reservation created: %s\n", new_res_name);
		free(new_res_name);
	}

SCONTROL_CREATE_RES_CLEANUP:
	if (free_user_str)
		xfree(resv_msg.users);
	if (free_acct_str)
		xfree(resv_msg.accounts);
	if (free_node_cnt)
		xfree(resv_msg.node_cnt);
	return ret;
}