/*
   Copyright (c) 2016 VMware, Inc. All Rights Reserved.
   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/

package log

import (
	"fmt"
)

// Level ...
type Level int

const (
	// DebugLevel debug
	DebugLevel Level = iota
	// InfoLevel info
	InfoLevel
	// WarningLevel warning
	WarningLevel
	// ErrorLevel error
	ErrorLevel
	// FatalLevel fatal
	FatalLevel
)

func (l Level) string() (lvl string) {
	switch l {
	case DebugLevel:
		lvl = "DEBUG"
	case InfoLevel:
		lvl = "INFO"
	case WarningLevel:
		lvl = "WARNING"
	case ErrorLevel:
		lvl = "ERROR"
	case FatalLevel:
		lvl = "FATAL"
	default:
		lvl = "UNKNOWN"
	}

	return
}

func parseLevel(lvl string) (level Level, err error) {

	switch lvl {
	case "debug":
		level = DebugLevel
	case "info":
		level = InfoLevel
	case "warning":
		level = WarningLevel
	case "error":
		level = ErrorLevel
	case "fatal":
		level = FatalLevel
	default:
		err = fmt.Errorf("invalid log level: %s", lvl)
	}

	return
}