package logger

import (
	"fmt"
	"os"

	"io"

	"bitbucket.org/nemt/nemt-portal-api/infra/config"
	"github.com/Sirupsen/logrus"
)

// Logger is the default application logger compatible with the echo.Logger interface
type Logger struct {
	cfg *config.Config
	*logrus.Entry
}

// InfoWriter returns the io.Writer for info level
func (l *Logger) InfoWriter() io.Writer {
	return l.WriterLevel(logrus.InfoLevel)
}

// ErrorWriter returns the io.Writer for error level
func (l *Logger) ErrorWriter() io.Writer {
	return l.WriterLevel(logrus.ErrorLevel)
}

// New returns a new Logger instance
func New(cfg *config.Config) (*Logger, error) {
	if cfg.Log.LogToFile {
		file, err := os.Create(cfg.Log.Path)
		if err != nil {
			fmt.Printf("Error to create log file for library: %s\n", err.Error())
			panic(err)
		}
		logrus.SetOutput(file)
	}

	logrus.SetFormatter(&logrus.JSONFormatter{})

	if cfg.App.Debug {
		logrus.SetLevel(logrus.DebugLevel)
	} else {
		logrus.SetLevel(logrus.InfoLevel)
	}

	entry := logrus.WithFields(logrus.Fields{
		"app": cfg.App.Name,
	})

	return &Logger{cfg, entry}, nil
}