package xlog

import (
	"io"
	"log"
)

// Logger logger
type Logger struct {
	logger *log.Logger
}

var (
	defLog *Logger
)

// New new logger
func New(w io.Writer) *Logger {
	logger := log.New(w, "[INFO]", log.Ldate|log.Ltime)
	return &Logger{logger: logger}
}

// DefaultLogger defult logger
func DefaultLogger(w io.Writer) *Logger {
	defLog = New(w)
	return defLog
}

// Writer returns the output destination for the standard logger.
func (l *Logger) Writer() io.Writer {
	return l.logger.Writer()
}

// SetOutput sets the output destination for the standard logger.
func (l *Logger) SetOutput(w io.Writer) {
	l.logger.SetOutput(w)
}

// Info log info
func (l *Logger) Info(v ...interface{}) {
	l.logger.SetPrefix("[INFO]")
	l.logger.Println(v...)
}

// Debug log debug
func (l *Logger) Debug(v ...interface{}) {
	l.logger.SetPrefix("[DEBUG]")
	l.logger.Println(v...)
}

// Warn log Warn
func (l *Logger) Warn(v ...interface{}) {
	l.logger.SetPrefix("[Warn]")
	l.logger.Println(v...)
}

// Err log Err
func (l *Logger) Err(v ...interface{}) {
	l.logger.SetPrefix("[Err]")
	l.logger.Println(v...)
}

// Alert log Alert
func (l *Logger) Alert(v ...interface{}) {
	l.logger.SetPrefix("[Alert]")
	l.logger.Println(v...)
}

// Fatal log Fatal
func (l *Logger) Fatal(v ...interface{}) {
	l.logger.SetPrefix("[Fatal]")
	l.logger.Println(v...)
}

// Panic log Panic
func (l *Logger) Panic(v ...interface{}) {
	l.logger.SetPrefix("[Panic]")
	l.logger.Println(v...)
}

// Writer returns the output destination for the standard logger.
func Writer() io.Writer {
	return defLog.Writer()
}

// SetOutput sets the output destination for the standard logger.
func SetOutput(w io.Writer) {
	defLog.SetOutput(w)
}

// Info info
func Info(v ...interface{}) {
	defLog.Info(v...)
}

// Debug debug
func Debug(v ...interface{}) {
	defLog.Debug(v...)
}

// Warn warn
func Warn(v ...interface{}) {
	defLog.Warn(v...)
}

// Err err
func Err(v ...interface{}) {
	defLog.Err(v...)
}

// Alert alert
func Alert(v ...interface{}) {
	defLog.Alert(v...)
}

// Fatal fatal
func Fatal(v ...interface{}) {
	defLog.Fatal(v...)
}

// Panic panic
func Panic(v ...interface{}) {
	defLog.Panic(v...)
}