package user_core_client

import (
	"fmt"
	"io"
	"log"
	"os"
	"sync/atomic"
)

type Logger interface {
	Printf(format string, v ...any)
}

func NewLogger() *SdkLogger {
	return &SdkLogger{
		logEnabled: atomic.Bool{},
		logger:     log.New(io.Discard, "user-core-sdk", log.LstdFlags|log.Lshortfile),
	}
}

type SdkLogger struct {
	logEnabled atomic.Bool
	logger     *log.Logger
}

func (l *SdkLogger) Debug(debug bool) *SdkLogger {
	if debug {
		l.logger.SetOutput(os.Stdout)
	} else {
		l.logger.SetOutput(io.Discard)
	}
	l.logEnabled.Store(debug)
	return l
}

func (l *SdkLogger) SetOutput(w io.Writer) *SdkLogger {
	if w == nil {
		l.logger.SetOutput(io.Discard)
	} else {
		l.logger.SetOutput(w)
	}
	return l
}

func (l *SdkLogger) Printf(format string, v ...any) {
	if !l.logEnabled.Load() {
		return
	}
	_ = l.logger.Output(2, fmt.Sprintf(format, v...))
}