/*
** Zabbix
** Copyright (C) 2001-2022 Zabbix SIA
**
** This program 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.
**
** This program 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 this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
**/

package oracle

import (
	"context"

	"zabbix.com/pkg/zbxerr"
)

func asmDiskGroupsHandler(ctx context.Context, conn OraClient, params map[string]string,
	_ ...string) (interface{}, error) {
	var diskGroups string

	row, err := conn.QueryRow(ctx, `
		SELECT
			JSON_ARRAYAGG(
				JSON_OBJECT(NAME VALUE
					JSON_OBJECT(
						'total_bytes' VALUE 
							ROUND(TOTAL_MB / DECODE(TYPE, 'EXTERN', 1, 'NORMAL', 2, 'HIGH', 3) * 1024 * 1024),
						'free_bytes'  VALUE 
							ROUND(USABLE_FILE_MB * 1024 * 1024),
						'used_pct'    VALUE 
							ROUND(100 - (USABLE_FILE_MB / (TOTAL_MB / 
							DECODE(TYPE, 'EXTERN', 1, 'NORMAL', 2, 'HIGH', 3))) * 100, 2)
				    )
				) RETURNING CLOB 
			)
         FROM 
         	V$ASM_DISKGROUP
	`)
	if err != nil {
		return nil, zbxerr.ErrorCannotFetchData.Wrap(err)
	}

	err = row.Scan(&diskGroups)
	if err != nil {
		return nil, zbxerr.ErrorCannotFetchData.Wrap(err)
	}

	if diskGroups == "" {
		diskGroups = "[]"
	}

	return diskGroups, nil
}