/*
** Zabbix
** Copyright (C) 2001-2023 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"
	"fmt"

	"git.zabbix.com/ap/plugin-support/zbxerr"
)

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

	row, err := conn.QueryRow(ctx, getCDBQuery(params["Database"]))
	if err != nil {
		return nil, zbxerr.ErrorCannotFetchData.Wrap(err)
	}

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

	if CDBInfo == "" {
		CDBInfo = "[]"
	}

	return CDBInfo, nil
}

func getCDBQuery(name string) string {
	var whereStr string
	if name != "" {
		whereStr = fmt.Sprintf(`WHERE NAME = '%s'`, name)
	}

	return fmt.Sprintf(`
	SELECT
		JSON_ARRAYAGG(
			JSON_OBJECT(NAME VALUE
				JSON_OBJECT(
					'open_mode' 	VALUE 
						DECODE(OPEN_MODE, 
							'MOUNTED',              1, 
							'READ ONLY',            2, 
							'READ WRITE',           3, 
							'READ ONLY WITH APPLY', 4, 
							'MIGRATE', 5, 
						0),
					'role' 			VALUE 
						DECODE(DATABASE_ROLE,
							'SNAPSHOT STANDBY', 1, 
							'LOGICAL STANDBY',  2, 
							'PHYSICAL STANDBY', 3, 
							'PRIMARY',          4, 
							'FAR SYNC', 5, 
						0),
					'force_logging' VALUE 
						DECODE(FORCE_LOGGING, 
							'YES', 1, 
							'NO' , 0, 
						0),
					'log_mode'      VALUE 
						DECODE(LOG_MODE, 
							'NOARCHIVELOG', 0,
							'ARCHIVELOG', 1, 
							'MANUAL', 2,
						0)
				)
			)
		)		
		FROM
			V$DATABASE
		%s
`, whereStr)
}