/*****************************************************************************\
 *  jobcomp_mysql.c - Store/Get all information in a mysql storage.
 *****************************************************************************
 *  Copyright (C) 2004-2007 The Regents of the University of California.
 *  Copyright (C) 2008-2009 Lawrence Livermore National Security.
 *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
 *  Written by Danny Auble <da@llnl.gov>
 *
 *  This file is part of Slurm, a resource management program.
 *  For details, see <https://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.
\*****************************************************************************/

/*
 * We can't include common/slurm_xlator.h here since it contains
 * list_push and list_pop which are mysql macros what for some reason
 * are given to us.  So if you need something from the header just
 * copy it here.
 */
#define	error			slurm_error

#include "mysql_jobcomp_process.h"
#include <pwd.h>
#include <grp.h>
#include <sys/types.h>
#include "src/common/id_util.h"
#include "src/common/parse_time.h"
#include "src/interfaces/select.h"

/*
 * These variables are required by the generic plugin interface.  If they
 * are not found in the plugin, the plugin loader will ignore it.
 *
 * plugin_name - a string giving a human-readable description of the
 * plugin.  There is no maximum length, but the symbol must refer to
 * a valid string.
 *
 * plugin_type - a string suggesting the type of the plugin or its
 * applicability to a particular form of data or method of data handling.
 * If the low-level plugin API is used, the contents of this string are
 * unimportant and may be anything.  Slurm uses the higher-level plugin
 * interface which requires this string to be of the form
 *
 *	<application>/<method>
 *
 * where <application> is a description of the intended application of
 * the plugin (e.g., "jobacct" for Slurm job completion logging) and <method>
 * is a description of how this plugin satisfies that application.  Slurm will
 * only load job completion logging plugins if the plugin_type string has a
 * prefix of "jobacct/".
 *
 * plugin_version - an unsigned 32-bit integer containing the Slurm version
 * (major.minor.micro combined into a single number).
 */
const char plugin_name[] = "Job completion MYSQL plugin";
const char plugin_type[] = "jobcomp/mysql";
const uint32_t plugin_version = SLURM_VERSION_NUMBER;

const char default_job_comp_loc[] = "slurm_jobcomp_db";

mysql_conn_t *jobcomp_mysql_conn = NULL;

char *jobcomp_table = "jobcomp_table";
storage_field_t jobcomp_table_fields[] = {
	{ "jobid", "int not null" },
	{ "uid", "int unsigned not null" },
	{ "user_name", "tinytext not null" },
	{ "gid", "int unsigned not null" },
	{ "group_name", "tinytext not null" },
	{ "name", "tinytext not null" },
	{ "state", "int unsigned not null" },
	{ "partition", "tinytext not null" },
	{ "timelimit", "tinytext not null" },
	{ "starttime", "int unsigned default 0 not null" },
	{ "endtime", "int unsigned default 0 not null" },
	{ "nodelist", "text" },
	{ "nodecnt", "int unsigned not null" },
	{ "proc_cnt", "int unsigned not null" },
	{ "connect_type", "tinytext" },
	{ "reboot", "tinytext" },
	{ "rotate", "tinytext" },
	{ "maxprocs", "int unsigned default 0 not null" },
	{ "geometry", "tinytext" },
	{ "start", "tinytext" },
	{ "blockid", "tinytext" },
	{ NULL, NULL}
};

static int _mysql_jobcomp_check_tables()
{
	if (mysql_db_create_table(jobcomp_mysql_conn, jobcomp_table,
				  jobcomp_table_fields,
				  ", primary key (jobid, starttime, endtime))")
	    == SLURM_ERROR)
		return SLURM_ERROR;

	return SLURM_SUCCESS;
}

extern int init(void)
{
	static int first = 1;

	if (first) {
		/* since this can be loaded from many different places
		   only tell us once. */
		verbose("%s loaded", plugin_name);
		first = 0;
	} else {
		debug4("%s loaded", plugin_name);
	}

	return SLURM_SUCCESS;
}

extern void fini(void)
{
	if (jobcomp_mysql_conn) {
		destroy_mysql_conn(jobcomp_mysql_conn);
		jobcomp_mysql_conn = NULL;
	}
}

extern int jobcomp_p_set_location(void)
{
	mysql_db_info_t *db_info;
	int rc = SLURM_SUCCESS;
	char *db_name = NULL;

	if (jobcomp_mysql_conn && mysql_db_ping(jobcomp_mysql_conn) == 0)
		return SLURM_SUCCESS;

	if (!slurm_conf.job_comp_loc) {
		slurm_conf.job_comp_loc = xstrdup(default_job_comp_loc);
		db_name = slurm_conf.job_comp_loc;
	} else {
		if (xstrchr(slurm_conf.job_comp_loc, '.') ||
		    xstrchr(slurm_conf.job_comp_loc, '/')) {
			debug("%s doesn't look like a database name using %s",
			      slurm_conf.job_comp_loc, default_job_comp_loc);
			db_name = (char *) default_job_comp_loc;
		} else
			db_name = slurm_conf.job_comp_loc;
	}

	debug2("mysql_connect() called for db %s", db_name);
	/* Just make sure our connection is gone. */
	fini();
	jobcomp_mysql_conn = create_mysql_conn(0, 0, NULL);

	db_info = create_mysql_db_info(SLURM_MYSQL_PLUGIN_JC);

	mysql_db_get_db_connection(jobcomp_mysql_conn, db_name, db_info);

	rc = _mysql_jobcomp_check_tables();

	destroy_mysql_db_info(db_info);

	if (rc == SLURM_SUCCESS)
		debug("Jobcomp database init finished");
	else
		debug("Jobcomp database init failed");
	return rc;
}

extern int jobcomp_p_record_job_end(job_record_t *job_ptr, uint32_t event)
{
	int rc = SLURM_SUCCESS;
	char *usr_str = NULL, *grp_str = NULL, lim_str[32], *jname = NULL;
	char *partition = NULL;
	uint32_t job_state;
	char *query = NULL, *on_dup = NULL;
	uint32_t time_limit;
	time_t start_time, end_time;

	if (!jobcomp_mysql_conn || mysql_db_ping(jobcomp_mysql_conn) != 0) {
		if (jobcomp_p_set_location())
			return SLURM_ERROR;
	}

	usr_str = user_from_job(job_ptr);
	grp_str = group_from_job(job_ptr);
	partition = job_ptr->part_ptr ? job_ptr->part_ptr->name :
					job_ptr->partition;

	if ((job_ptr->time_limit == NO_VAL) && job_ptr->part_ptr)
		time_limit = job_ptr->part_ptr->max_time;
	else
		time_limit = job_ptr->time_limit;
	if (time_limit == INFINITE)
		strcpy(lim_str, "UNLIMITED");
	else {
		snprintf(lim_str, sizeof(lim_str), "%lu",
			 (unsigned long) time_limit);
	}

	/* Job will typically be COMPLETING when this is called.
	 * We remove the flags to get the eventual completion state:
	 * JOB_FAILED, JOB_TIMEOUT, etc. */
	if (IS_JOB_RESIZING(job_ptr)) {
		job_state = JOB_RESIZING;
		if (job_ptr->resize_time)
			start_time = job_ptr->resize_time;
		else
			start_time = job_ptr->start_time;
		end_time = time(NULL);
	} else {
		job_state = job_ptr->job_state & JOB_STATE_BASE;
		if (job_ptr->resize_time)
			start_time = job_ptr->resize_time;
		else if (job_ptr->start_time > job_ptr->end_time) {
			/* Job cancelled while pending and
			 * expected start time is in the future. */
			start_time = 0;
		} else
			start_time = job_ptr->start_time;
		end_time = job_ptr->end_time;
	}

	if (job_ptr->name && job_ptr->name[0])
		jname = slurm_add_slash_to_quotes(job_ptr->name);
	else
		jname = xstrdup("allocation");

	query = xstrdup_printf(
		"insert into %s (jobid, uid, user_name, gid, group_name, "
		"name, state, proc_cnt, `partition`, timelimit, "
		"starttime, endtime, nodecnt",
		jobcomp_table);

	if (job_ptr->nodes)
		xstrcat(query, ", nodelist");
	if (job_ptr->details && (job_ptr->details->max_cpus != NO_VAL))
		xstrcat(query, ", maxprocs");
	xstrfmtcat(query, ") values (%u, %u, '%s', %u, '%s', '%s', %u, %u, "
		   "'%s', '%s', %ld, %ld, %u",
		   job_ptr->job_id, job_ptr->user_id, usr_str,
		   job_ptr->group_id, grp_str, jname,
		   job_state, job_ptr->total_cpus, partition, lim_str,
		   start_time, end_time, job_ptr->node_cnt);

	xstrfmtcat(on_dup, "uid=%u, user_name='%s', gid=%u, group_name='%s', "
		   "name='%s', state=%u, proc_cnt=%u, `partition`='%s', "
		   "timelimit='%s', nodecnt=%u",
		   job_ptr->user_id, usr_str, job_ptr->group_id, grp_str, jname,
		   job_state, job_ptr->total_cpus, partition, lim_str,
		   job_ptr->node_cnt);

	if (job_ptr->nodes) {
		xstrfmtcat(query, ", '%s'", job_ptr->nodes);
		xstrfmtcat(on_dup, ", nodelist='%s'", job_ptr->nodes);
	}

	if (job_ptr->details && (job_ptr->details->max_cpus != NO_VAL)) {
		xstrfmtcat(query, ", '%u'", job_ptr->details->max_cpus);
		xstrfmtcat(on_dup, ", maxprocs='%u'",
			   job_ptr->details->max_cpus);
	}

	xstrfmtcat(query, ") ON DUPLICATE KEY UPDATE %s;", on_dup);

	debug3("(%s:%d) query\n%s",
	       THIS_FILE, __LINE__, query);
	rc = mysql_db_query(jobcomp_mysql_conn, query);
	xfree(usr_str);
	xfree(grp_str);
	xfree(jname);
	xfree(query);
	xfree(on_dup);

	return rc;
}

/*
 * get info from the storage
 * in/out job_list list of job_rec_t *
 * note list needs to be freed when called
 */
extern list_t *jobcomp_p_get_jobs(slurmdb_job_cond_t *job_cond)
{
	list_t *job_list = NULL;

	if (!jobcomp_mysql_conn || mysql_db_ping(jobcomp_mysql_conn) != 0) {
		if (jobcomp_p_set_location())
			return job_list;
	}

	job_list = mysql_jobcomp_process_get_jobs(job_cond);

	return job_list;
}

extern int jobcomp_p_record_job_start(job_record_t *job_ptr, uint32_t event)
{
	return SLURM_SUCCESS;
}