package main

import (
	"fmt"
)

const (
	english = "English"
	spanish = "Spanish"

	englishHelloPrefix = "Hello "
	spanishHelloPrefix = "Hola "

	englishDefaultWorld = "world"
	spanishDefaultWorld = "Mundo"
)

func getDefaultWorldByLanguage(language string) string {
	switch language {
	case english:
		return englishDefaultWorld
	case spanish:
		return spanishDefaultWorld
	}

	return englishDefaultWorld
}

func getHelloPrefixByLanguage(language string) string {
	switch language {
	case english:
		return englishHelloPrefix
	case spanish:
		return spanishHelloPrefix
	}
	return englishHelloPrefix
}

func Hello(name, language string) string {
	prefix := getHelloPrefixByLanguage(language)

	if name == "" {
		return prefix + getDefaultWorldByLanguage(language)
	}
	return prefix + name
}

func main() {
	fmt.Println(Hello("Mary", "English"))
}