/*****************************************************************************\
 *  resv_reports.c - functions for generating reservation reports
 *                       from accounting infrastructure.
 *****************************************************************************
 *
 *  Copyright (C) 2008 Lawrence Livermore National Security.
 *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
 *  Written by Danny Auble <da@llnl.gov>
 *  CODE-OCEC-09-009. All rights reserved.
 *
 *  This file is part of SLURM, a resource management program.
 *  For details, see <http://slurm.schedmd.com/>.
 *  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 "cluster_reports.h"

enum {
	PRINT_RESV_NAME,
	PRINT_RESV_CLUSTER,
	PRINT_RESV_CPUS,
	PRINT_RESV_ACPU,
	PRINT_RESV_DCPU,
	PRINT_RESV_ICPU,
	PRINT_RESV_NODES,
	PRINT_RESV_ASSOCS,
	PRINT_RESV_START,
	PRINT_RESV_END,
	PRINT_RESV_FLAGS,
	PRINT_RESV_TIME,
	PRINT_RESV_CPUTIME,
};

typedef enum {
	GROUP_BY_ACCOUNT,
	GROUP_BY_ACCOUNT_JOB_SIZE,
	GROUP_BY_ACCOUNT_JOB_SIZE_DURATION,
	GROUP_BY_USER,
	GROUP_BY_USER_JOB_SIZE,
	GROUP_BY_USER_JOB_SIZE_DURATION,
	GROUP_BY_NONE
} report_grouping_t;

static List print_fields_list = NULL; /* types are of print_field_t */

static int _set_resv_cond(int *start, int argc, char *argv[],
			  slurmdb_reservation_cond_t *resv_cond,
			  List format_list)
{
	int i;
	int set = 0;
	int end = 0;
	int local_cluster_flag = all_clusters_flag;
	time_t start_time, end_time;
	int command_len = 0;

	if (!resv_cond) {
		error("We need an slurmdb_reservation_cond to call this");
		return SLURM_ERROR;
	}

	resv_cond->with_usage = 1;

	if (!resv_cond->cluster_list)
		resv_cond->cluster_list = list_create(slurm_destroy_char);
	for (i=(*start); i<argc; i++) {
		end = parse_option_end(argv[i]);
		if (!end)
			command_len=strlen(argv[i]);
		else {
			command_len=end-1;
			if (argv[i][end] == '=') {
				end++;
			}
		}

		if (!end && !strncasecmp(argv[i], "all_clusters",
					       MAX(command_len, 1))) {
			local_cluster_flag = 1;
		} else if (!end
			  || !strncasecmp (argv[i], "Names",
					 MAX(command_len, 1))) {
			if (!resv_cond->name_list)
				resv_cond->name_list =
					list_create(slurm_destroy_char);
			slurm_addto_char_list(resv_cond->name_list,
					      argv[i]+end);
			set = 1;
		} else if (!strncasecmp (argv[i], "Clusters",
					 MAX(command_len, 1))) {
			slurm_addto_char_list(resv_cond->cluster_list,
					      argv[i]+end);
			set = 1;
		} else if (!strncasecmp (argv[i], "End", MAX(command_len, 1))) {
			resv_cond->time_end = parse_time(argv[i]+end, 1);
			set = 1;
		} else if (!strncasecmp (argv[i], "Flags",
					 MAX(command_len, 2))) {
			/* FIX ME: make flags work here */
			//resv_cond->flags = parse_resv_flags(argv[i]+end);
			set = 1;
		} else if (!strncasecmp (argv[i], "Format",
					 MAX(command_len, 2))) {
			if (format_list)
				slurm_addto_char_list(format_list,
						      argv[i]+end);
		} else if (!strncasecmp (argv[i], "Ids",
					 MAX(command_len, 1))) {
			if (!resv_cond->id_list)
				resv_cond->id_list =
					list_create(slurm_destroy_char);
			slurm_addto_char_list(resv_cond->id_list, argv[i]+end);
			set = 1;
		} else if (!strncasecmp (argv[i], "Nodes",
					 MAX(command_len, 1))) {
			if (resv_cond->nodes) {
				error("You already specified nodes '%s' "
				      " combine your request into 1 nodes=.",
				      resv_cond->nodes);
				exit_code = 1;
				break;
			}
			resv_cond->nodes = xstrdup(argv[i]+end);
			set = 1;
		} else if (!strncasecmp (argv[i], "Start",
					 MAX(command_len, 1))) {
			resv_cond->time_start = parse_time(argv[i]+end, 1);
			set = 1;
		} else {
			exit_code=1;
			fprintf(stderr," Unknown condition: %s\n"
			       "Use keyword set to modify value\n", argv[i]);
		}
	}
	(*start) = i;

	if (!local_cluster_flag && !list_count(resv_cond->cluster_list)) {
		char *temp = slurm_get_cluster_name();
		if (temp)
			list_append(resv_cond->cluster_list, temp);
	}

	/* This needs to be done on some systems to make sure
	   cluster_cond isn't messed.  This has happened on some 64
	   bit machines and this is here to be on the safe side.
	*/
	start_time = resv_cond->time_start;
	end_time = resv_cond->time_end;
	slurmdb_report_set_start_end_time(&start_time, &end_time);
	resv_cond->time_start = start_time;
	resv_cond->time_end = end_time;

	return set;
}

static int _setup_print_fields_list(List format_list)
{
	ListIterator itr = NULL;
	print_field_t *field = NULL;
	char *object = NULL;

	if (!format_list || !list_count(format_list)) {
		exit_code=1;
			fprintf(stderr, " we need a format list "
				"to set up the print.\n");
		return SLURM_ERROR;
	}

	if (!print_fields_list)
		print_fields_list = list_create(destroy_print_field);

	itr = list_iterator_create(format_list);
	while((object = list_next(itr))) {
		char *tmp_char = NULL;
		int command_len = 0;
		int newlen = 0;

		if ((tmp_char = strstr(object, "\%"))) {
			newlen = atoi(tmp_char+1);
			tmp_char[0] = '\0';
		}

		command_len = strlen(object);

		field = xmalloc(sizeof(print_field_t));
		if (!strncasecmp("allocated", object,
				MAX(command_len, 2))) {
			field->type = PRINT_RESV_ACPU;
			field->name = xstrdup("Allocated");
			if (time_format == SLURMDB_REPORT_TIME_SECS_PER
			   || time_format == SLURMDB_REPORT_TIME_MINS_PER
			   || time_format == SLURMDB_REPORT_TIME_HOURS_PER)
				field->len = 20;
			else
				field->len = 9;
			field->print_routine = slurmdb_report_print_time;
		} else if (!strncasecmp("Associations",
				       object, MAX(command_len, 2))) {
			field->type = PRINT_RESV_ASSOCS;
			field->name = xstrdup("Associations");
			field->len = 15;
			field->print_routine = print_fields_str;
		} else if (!strncasecmp("Cluster", object,
				       MAX(command_len, 2))) {
			field->type = PRINT_RESV_CLUSTER;
			field->name = xstrdup("Cluster");
			field->len = 9;
			field->print_routine = print_fields_str;
		} else if (!strncasecmp("cpucount", object,
				       MAX(command_len, 2))) {
			field->type = PRINT_RESV_CPUS;
			field->name = xstrdup("CPU count");
			field->len = 9;
			field->print_routine = print_fields_uint;
		} else if (!strncasecmp("down", object, MAX(command_len, 1))) {
			field->type = PRINT_RESV_DCPU;
			field->name = xstrdup("Down");
			if (time_format == SLURMDB_REPORT_TIME_SECS_PER
			   || time_format == SLURMDB_REPORT_TIME_MINS_PER
			   || time_format == SLURMDB_REPORT_TIME_HOURS_PER)
				field->len = 20;
			else
				field->len = 9;
			field->print_routine = slurmdb_report_print_time;
		} else if (!strncasecmp("idle", object, MAX(command_len, 1))) {
			field->type = PRINT_RESV_ICPU;
			field->name = xstrdup("Idle");
			if (time_format == SLURMDB_REPORT_TIME_SECS_PER
			   || time_format == SLURMDB_REPORT_TIME_MINS_PER
			   || time_format == SLURMDB_REPORT_TIME_HOURS_PER)
				field->len = 20;
			else
				field->len = 9;
			field->print_routine = slurmdb_report_print_time;
		} else if (!strncasecmp("Nodes", object, MAX(command_len, 2))) {
			field->type = PRINT_RESV_NODES;
			field->name = xstrdup("Nodes");
			field->len = 15;
			field->print_routine = print_fields_str;
		} else if (!strncasecmp("Name", object,
				       MAX(command_len, 2))) {
			field->type = PRINT_RESV_NAME;
			field->name = xstrdup("Name");
			field->len = 9;
			field->print_routine = print_fields_str;
		} else if (!strncasecmp("Start", object,
				       MAX(command_len, 2))) {
			field->type = PRINT_RESV_START;
			field->name = xstrdup("Start");
			field->len = 19;
			field->print_routine = print_fields_date;
		} else if (!strncasecmp("End", object,
				       MAX(command_len, 2))) {
			field->type = PRINT_RESV_END;
			field->name = xstrdup("End");
			field->len = 19;
			field->print_routine = print_fields_date;
		} else if (!strncasecmp("TotalTime", object,
				       MAX(command_len, 2))) {
			field->type = PRINT_RESV_TIME;
			field->name = xstrdup("TotalTime");
			field->len = 9;
			field->print_routine = print_fields_time_from_secs;
		} else if (!strncasecmp("CPUTime", object,
				       MAX(command_len, 2))) {
			field->type = PRINT_RESV_CPUTIME;
			field->name = xstrdup("CPUTime");
			field->len = 9;
			field->print_routine = print_fields_time_from_secs;
		} else {
			exit_code=1;
			fprintf(stderr, " Unknown field '%s'\n", object);
			xfree(field);
			continue;
		}

		if (newlen)
			field->len = newlen;

		list_append(print_fields_list, field);
	}
	list_iterator_destroy(itr);

	return SLURM_SUCCESS;
}

static List _get_resv_list(int argc, char *argv[],
			   char *report_name, List format_list)
{
	slurmdb_reservation_cond_t *resv_cond =
		xmalloc(sizeof(slurmdb_reservation_cond_t));
	int i=0;
	List resv_list = NULL;

	resv_cond->with_usage = 1;

	_set_resv_cond(&i, argc, argv, resv_cond, format_list);

	resv_list = slurmdb_reservations_get(db_conn, resv_cond);
	if (!resv_list) {
		exit_code=1;
		fprintf(stderr, " Problem with resv query.\n");
		return NULL;
	}

	if (print_fields_have_header) {
		char start_char[20];
		char end_char[20];
		time_t my_start = resv_cond->time_start;
		time_t my_end = resv_cond->time_end-1;

		slurm_make_time_str(&my_start,
				    start_char, sizeof(start_char));
		slurm_make_time_str(&my_end,
				    end_char, sizeof(end_char));
		printf("----------------------------------------"
		       "----------------------------------------\n");
		printf("%s %s - %s\n",
		       report_name, start_char, end_char);
		switch(time_format) {
		case SLURMDB_REPORT_TIME_PERCENT:
			printf("Time reported in %s\n", time_format_string);
			break;
		default:
			printf("Time reported in CPU %s\n", time_format_string);
			break;
		}
		printf("----------------------------------------"
		       "----------------------------------------\n");
	}

	slurmdb_destroy_reservation_cond(resv_cond);

	return resv_list;
}

extern int resv_utilization(int argc, char *argv[])
{
	int rc = SLURM_SUCCESS;
	ListIterator itr = NULL;
	ListIterator tot_itr = NULL;
	ListIterator itr2 = NULL;
	slurmdb_reservation_rec_t *resv = NULL;
	slurmdb_reservation_rec_t *tot_resv = NULL;

	print_field_t *field = NULL;
	int32_t total_time = 0;

	List resv_list = NULL;
	List tot_resv_list = NULL;

	List format_list = list_create(slurm_destroy_char);
	int field_count = 0;

	print_fields_list = list_create(destroy_print_field);


	if (!(resv_list = _get_resv_list(argc, argv,
					"Reservation Utilization",
					format_list)))
		goto end_it;

	if (!list_count(format_list))
		slurm_addto_char_list(format_list,
				      "Cl,name,start,end,al,i");

	_setup_print_fields_list(format_list);
	list_destroy(format_list);

	/* we will just use the pointers returned from the
	   get_resv_list here, so don't remove them
	*/
	tot_resv_list = list_create(NULL);

	itr = list_iterator_create(resv_list);
	tot_itr = list_iterator_create(tot_resv_list);
	itr2 = list_iterator_create(print_fields_list);

	print_fields_header(print_fields_list);

	field_count = list_count(print_fields_list);

	/* compress all the reservations into a single reservation.
	   Since reservations can have multiple entries like if the
	   node count changes or something after the reservation
	   starts.  Here we colapse them into 1 record.
	*/
	while((resv = list_next(itr))) {
		while((tot_resv = list_next(tot_itr))) {
			if (tot_resv->id == resv->id) {
				/* get an average of cpus if the
				   reservation changes we will just
				   get an average.
				*/
				tot_resv->cpus += resv->cpus;
				tot_resv->cpus /= 2;
				tot_resv->alloc_secs += resv->alloc_secs;
				tot_resv->down_secs += resv->down_secs;
				if (resv->time_start < tot_resv->time_start)
					tot_resv->time_start = resv->time_start;
				if (resv->time_end > tot_resv->time_end)
					tot_resv->time_end = resv->time_end;
				break;
			}
		}
		if (!tot_resv)
			list_append(tot_resv_list, resv);

		list_iterator_reset(tot_itr);
	}

	list_sort(tot_resv_list, (ListCmpF)sort_reservations_dec);
	list_iterator_reset(tot_itr);
	while((tot_resv = list_next(tot_itr))) {
		uint64_t idle_secs = 0, total_reported = 0;
		int curr_inx = 1;

		total_time = tot_resv->time_end - tot_resv->time_start;
		if (total_time <= 0)
			continue;
		total_reported = (uint64_t)(total_time * tot_resv->cpus);

		idle_secs = total_reported
			- tot_resv->alloc_secs - tot_resv->down_secs;

		while((field = list_next(itr2))) {
			switch(field->type) {
			case PRINT_RESV_NAME:
				field->print_routine(field,
						     tot_resv->name,
						     (curr_inx ==
						      field_count));
				break;
			case PRINT_RESV_CLUSTER:
				field->print_routine(field,
						     tot_resv->cluster,
						     (curr_inx ==
						      field_count));
				break;
			case PRINT_RESV_CPUS:
				field->print_routine(field,
						     tot_resv->cpus,
						     (curr_inx ==
						      field_count));
				break;
			case PRINT_RESV_ACPU:
				field->print_routine(field,
						     tot_resv->alloc_secs,
						     total_reported,
						     (curr_inx ==
						      field_count));
				break;
			case PRINT_RESV_DCPU:
				field->print_routine(field,
						     tot_resv->down_secs,
						     total_reported,
						     (curr_inx ==
						      field_count));
				break;
			case PRINT_RESV_ICPU:
				field->print_routine(field,
						     idle_secs,
						     total_reported,
						     (curr_inx ==
						      field_count));
				break;
			case PRINT_RESV_NODES:
				field->print_routine(field,
						     tot_resv->nodes,
						     (curr_inx ==
						      field_count));
				break;
			case PRINT_RESV_ASSOCS:
				field->print_routine(field,
						     tot_resv->assocs,
						     (curr_inx ==
						      field_count));
				break;
			case PRINT_RESV_START:
				field->print_routine(field,
						     tot_resv->time_start,
						     (curr_inx ==
						      field_count));
				break;
			case PRINT_RESV_END:
				field->print_routine(field,
						     tot_resv->time_end,
						     (curr_inx ==
						      field_count));
				break;
			case PRINT_RESV_TIME:
				field->print_routine(field,
						     (uint64_t)total_time,
						     (curr_inx ==
						      field_count));
				break;
			case PRINT_RESV_CPUTIME:
				field->print_routine(field,
						     total_reported,
						     (curr_inx ==
						      field_count));
				break;
			default:
				field->print_routine(
					field, NULL,
					(curr_inx == field_count));
				break;
			}
			curr_inx++;
		}
		list_iterator_reset(itr2);
		printf("\n");
	}

	list_iterator_destroy(tot_itr);
	list_iterator_destroy(itr2);
	list_iterator_destroy(itr);

end_it:
	if (resv_list) {
		list_destroy(resv_list);
		resv_list = NULL;
	}
	if (tot_resv_list) {
		list_destroy(tot_resv_list);
		tot_resv_list = NULL;
	}
	if (print_fields_list) {
		list_destroy(print_fields_list);
		print_fields_list = NULL;
	}

	return rc;
}