// Copyright (C) 2014-2018 Goodrain Co., Ltd.
// RAINBOND, Application Management Platform

// 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 3 of the License, or
// (at your option) any later version. For any non-GPL usage of Rainbond,
// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
// must be obtained first.

// 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, see <http://www.gnu.org/licenses/>.

package exporter

import "fmt"

type timerType string

const (
	timerTypeHistogram timerType = "histogram"
	timerTypeSummary   timerType = "summary"
	timerTypeDefault   timerType = ""
)

func (t *timerType) UnmarshalYAML(unmarshal func(interface{}) error) error {
	var v string
	if err := unmarshal(&v); err != nil {
		return err
	}

	switch timerType(v) {
	case timerTypeHistogram:
		*t = timerTypeHistogram
	case timerTypeSummary, timerTypeDefault:
		*t = timerTypeSummary
	default:
		return fmt.Errorf("invalid timer type '%s'", v)
	}
	return nil
}