/*
 * repmgr-action-cluster.c
 *
 * Implements cluster information actions for the repmgr command line utility
 *
 * Copyright (c) 2ndQuadrant, 2010-2017
 */

#include "repmgr.h"

#include "repmgr-client-global.h"
#include "repmgr-action-cluster.h"

/*
 * CLUSTER EVENT
 *
 * Parameters:
 *   --limit[=20]
 *   --all
 *   --node_[id|name]
 *   --event
 */
void
do_cluster_event(void)
{
	PGconn			 *conn;
	PQExpBufferData	  query;
	PQExpBufferData	  where_clause;
	PGresult		 *res;
	int			 	  i;

	conn = establish_db_connection(config_file_options.conninfo, true);

	initPQExpBuffer(&query);
	initPQExpBuffer(&where_clause);

	appendPQExpBuffer(&query,
					  " SELECT node_id, event, successful, \n"
					  "        TO_CHAR(event_timestamp, 'YYYY-MM-DD HH24:MI:SS') AS timestamp, \n"
					  "        details \n"
					  "   FROM repmgr.events");

	if (runtime_options.node_id != UNKNOWN_NODE_ID)
	{
		append_where_clause(&where_clause,
							"node_id=%i", runtime_options.node_id);
	}

	if (runtime_options.event[0] != '\0')
	{
		char *escaped = escape_string(conn, runtime_options.event);

		if (escaped == NULL)
		{
			log_error(_("unable to escape value provided for event"));
		}
		else
		{
			append_where_clause(&where_clause,
								"event='%s'",
								escaped);
			pfree(escaped);
		}
	}

	appendPQExpBuffer(&query, "\n%s\n",
					  where_clause.data);

	appendPQExpBuffer(&query,
					  " ORDER BY event_timestamp DESC");

	if (runtime_options.all == false && runtime_options.limit > 0)
	{
		appendPQExpBuffer(&query, " LIMIT %i",
						  runtime_options.limit);
	}

	log_debug("do_cluster_event():\n%s", query.data);
	res = PQexec(conn, query.data);

	if (PQresultStatus(res) != PGRES_TUPLES_OK)
	{
		log_error(_("unable to execute event query:\n  %s"),
				  PQerrorMessage(conn));
		PQclear(res);
		PQfinish(conn);
		exit(ERR_DB_QUERY);
	}

	if (PQntuples(res) == 0) {
		printf(_("no matching events found\n"));
		PQclear(res);
		PQfinish(conn);
		return;
	}

	/* XXX improve formatting */
	puts("node_id,event,ok,timestamp,details");
	puts("----------------------------------");
	for(i = 0; i < PQntuples(res); i++)
	{
		printf("%s,%s,%s,%s,%s\n",
			   PQgetvalue(res, i, 0),
			   PQgetvalue(res, i, 1),
			   PQgetvalue(res, i, 2),
			   PQgetvalue(res, i, 3),
			   PQgetvalue(res, i, 4));
	}

	PQclear(res);

	PQfinish(conn);
}