package log

import (
	"fmt"
	"log"
	"log/slog"
	"strings"

	"github.com/prometheus/client_golang/prometheus"
	"github.com/prometheus/client_golang/prometheus/promauto"
)

var (
	errorMetric = promauto.NewCounter(
		prometheus.CounterOpts{
			Name: "mefit_error_total",
			Help: "The total number of errors during processing",
		},
	)
)

func Fatal(message string, args ...interface{}) {
	s := format(message, args)
	log.Fatal(s)

	errorMetric.Inc()
}

func Error(message string, args ...interface{}) {
	s := format(message, args)
	slog.Error(s)

	errorMetric.Inc()
}

func Warn(message string, args ...interface{}) {
	s := format(message, args)
	slog.Warn(s)
}

func Info(message string, args ...interface{}) {
	s := format(message, args)
	slog.Info(s)
}

func format(message string, args []interface{}) string {
	var w strings.Builder

	if len(args) > 0 {
		fmt.Fprintf(&w, message, args...)
	} else {
		w.WriteString(message)
	}

	return w.String()
}