package dilog

import (
	"io/ioutil"

	"github.com/sirupsen/logrus"
)

// Fields are log fields to log, it is an map[string]interface{}
type Fields = logrus.Fields

// Discard is the always present nil-logger
var Discard = NewNilLogger()

// Logger is the generic logger type which has all required logging attributes
type Logger interface {
	WithField(key string, value interface{}) Logger
	WithFields(fields Fields) Logger
	WithError(err error) Logger

	Debug(args ...interface{})
	Info(args ...interface{})
	Warning(args ...interface{})
	Error(args ...interface{})
	Fatal(args ...interface{})
	Panic(args ...interface{})
}

// NewNilLogger returns a /dev/null logger which logs to nowhere
func NewNilLogger() Logger {
	logger := logrus.New()
	logger.Out = ioutil.Discard

	return &Logrus{logrus.NewEntry(logger)}
}