package main

import (
	"os"

	"github.com/goloop/log"
	"github.com/goloop/log/layout"
	"github.com/goloop/log/level"

	// It is not necessary to import this module, the three-valued logic
	// constants can be represented using integers where: -1 is False,
	// 0 is Unknown, and 1 is True.
	"github.com/goloop/trit"
)

func main() {
	// Open the file in append mode. Create the file if it doesn't exist.
	// Use appropriate permissions in a production setting.
	file, err := os.OpenFile(
		"errors.log",
		os.O_APPEND|os.O_CREATE|os.O_WRONLY,
		0644,
	)

	if err != nil {
		log.Fatal(err)
	}

	// Defer the closing of the file until the function ends.
	defer file.Close()

	// Set the outputs of the log to our file.
	// We can set many different outputs to record
	// individual errors, debug or mixed data.
	err = log.SetOutputs(
		log.Output{
			Name:      "stdout",
			Writer:    os.Stdout,
			Levels:    level.Debug | level.Info | level.Warn | level.Error,
			Layouts:   layout.Default,
			WithColor: 1, // or trit.True, see github.com/goloop/trit
		},
		log.Output{
			Name:      "errorsJSONFile",
			Writer:    file,
			Levels:    level.Warn | level.Error, // only errors and warnings
			Layouts:   layout.Default,
			TextStyle: trit.False, // or just -1
		},
	)

	if err != nil {
		log.Fatal(err)
	}

	// A message will be output to a file and to the console.
	// * stdout and errorsJSONFile has Error level.
	log.Errorln("This is a test log message with ERROR.")

	// A message will be output to the console only.
	// * stdout has Debug level, but errorsJSONFile has not.
	log.Debugln("This is a test log message with DEBUG.")
}