package log

import (
	"fmt"
	"velvettear/go-scan/util/date"
)

// exported functions
func Debug(logMessage string, logExtras ...string) {
	trace(0, logMessage, logExtras...)
}

func Info(logMessage string, logExtras ...string) {
	trace(1, logMessage, logExtras...)
}

func Warning(logMessage string, logExtras ...string) {
	trace(2, logMessage, logExtras...)
}

func Error(logMessage string, logExtras ...string) {
	trace(3, logMessage, logExtras...)
}

// unexported functions
func trace(logLevel int, logMessage string, logExtras ...string) {
	if len(logMessage) == 0 {
		return
	}
	extras := ""
	for index := 0; index < len(logExtras); index++ {
		tmp := logExtras[index]
		if len(tmp) == 0 {
			continue
		}
		if index > 0 {
			extras += " | "
		}
		extras += logExtras[index]
	}
	if len(extras) > 0 {
		logMessage = logMessage + " (" + extras + ")"
	}
	fmt.Println(buildLogMessage(getPrefixForLogLevel(logLevel), logMessage))
}

func getPrefixForLogLevel(loglevel int) string {
	switch loglevel {
	case 3:
		return "error"
	case 2:
		return "warning"
	case 1:
		return "info"
	default:
		return "debug"
	}
}

func buildLogMessage(prefix string, message string) string {
	timestamp := date.New()
	return timestamp.GetFormattedDate() + " [" + prefix + "]" + " > " + message
}