package log

import "time"

// Formatter ...
// - must be thread safe
// TODO: measure if it's faster to have a goroutine consuming a chan, compared to locking using a mutex.
//
// TODO: what about buffered channels? How/When will the timestamp be added?
//
//	-> Answer: should be added to the Envelope right before the call to Output()
//	-> There should be an in between layer doing the channel thing calling Output()
type Formatter interface {

	// Output generates a log entry based on the given message and Envelope
	Output(message string, e Envelope)
}

type Envelope interface {
	Logger() logger
	Level() level
	Error() error
	Arguments() []*Argument
	Time() time.Time
}

// envelopeData wraps an envelope to match the Envelope interface.
type envelopeData struct {
	envelope
	t time.Time
}

func (e envelopeData) Logger() logger {
	return e.log
}

func (e envelopeData) Level() level {
	return e.lvl
}

func (e envelopeData) Error() error {
	return e.err
}

func (e envelopeData) Arguments() []*Argument {
	return e.args
}

func (e envelopeData) Time() time.Time {
	return e.t
}