/*
** 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 pdbHandler(ctx context.Context, conn OraClient, params map[string]string, _ ...string) (interface{}, error) {
	var PDBInfo string
	row, err := conn.QueryRow(ctx, getPDBQuery(params["Database"]))
	if err != nil {
		return nil, zbxerr.ErrorCannotFetchData.Wrap(err)
	}

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

	if PDBInfo == "" {
		PDBInfo = "[]"
	}

	return PDBInfo, nil
}

func getPDBQuery(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
					)
				)
			)
		)
		FROM
			V$PDBS
		%s
`, whereStr)
}