package main

import (
	"fmt"
	"log"
	"path/filepath"
	"runtime"
)

const (
	logDebug uint = iota
	logWarn
	logAlert
)

func failError(err error, format string, a ...interface{}) {
	if err != nil {
		_, fn, line, _ := runtime.Caller(1)
		out := fmt.Sprintf(format, a...)
		log.Fatalf("[%s:%d] %s : %s", filepath.Base(fn), line, out, err)
	}
}

func logError(err error, lvl uint, format string, a ...interface{}) {
	if err != nil && lvl >= 0 {
		_, fn, line, _ := runtime.Caller(2)
		out := fmt.Sprintf(format, a...)
		log.Printf("[%s:%d] %s : %s", filepath.Base(fn), line, out, err)
	}
}

func logInfo(lvl uint, format string, a ...interface{}) {
	if lvl >= 0 {
		_, fn, line, _ := runtime.Caller(2)
		out := fmt.Sprintf(format, a...)
		log.Printf("[%s:%d] %s", filepath.Base(fn), line, out)
	}
}

func logInfoDebug(format string, a ...interface{}) {
	logInfo(logDebug, format, a...)
}

func logInfoWarn(format string, a ...interface{}) {
	logInfo(logWarn, format, a...)
}

func logInfoAlert(format string, a ...interface{}) {
	logInfo(logAlert, format, a...)
}

func logErrorDebug(err error, format string, a ...interface{}) {
	logError(err, logDebug, format, a...)
}

func logErrorWarn(err error, format string, a ...interface{}) {
	logError(err, logWarn, format, a...)
}

func logErrorAlert(err error, format string, a ...interface{}) {
	logError(err, logAlert, format, a...)
}