package gotext

import (
	"fmt"
	"os"
	"reflect"
)



func showColour() bool {
	return os.Getenv("NO_COLOUR") == ""
}

func testStart(name string) {
	fmt.Fprintf(os.Stderr, "%s:\n", name)
}

func testing(message string, body func()) {
	if showColour() {
		fmt.Fprintf(
			os.Stderr,
			"\033[0;33mtesting\033[0m: %s... ",
			message,
		)
		body()
		fmt.Fprintf(os.Stderr, "\033[0;32mOK\033[0m.\n")
	} else {
		fmt.Fprintf(os.Stderr, "testing: %s... ", message)
		body()
		fmt.Fprintf(os.Stderr, "OK.\n")
	}
}

func assertEq(given any, expected any) {
	if !reflect.DeepEqual(given, expected) {
		if showColour() {
			fmt.Fprintf(os.Stderr, "\033[0;31mERR\033[0m.\n")
		} else {
			fmt.Fprintf(os.Stderr, "ERR.\n")
		}
		fmt.Fprintf(os.Stderr, "given != expected\n")
		fmt.Fprintf(os.Stderr, "given:    %#v\n", given)
		fmt.Fprintf(os.Stderr, "expected: %#v\n", expected)
		os.Exit(1)
	}
}



func MainTest() {
	Init("tests", "locale/")

	testing("Español", func() {
		SetLocale(LC_MESSAGES, "es_MX.UTF-8")

		assertEq(Gettext("Hello, world!"), "¡Hola, mundo!")
		assertEq(Gettext("Good morning"),  "Buenos días")
		assertEq(Gettext("Good bye!"),     "¡Hasta luego!")
		assertEq(Sprintf(
			NGettext("An apple", "%d apples", 1),
			1,
			"garbage",
		), "Una manzana")
		assertEq(Sprintf(
			NGettext("An apple", "%d apples", 3),
			3,
		), "3 manzanas")
	})

	testing("Deutsch", func() {
		SetLocale(LC_MESSAGES, "de_DE.UTF-8")

		assertEq(Gettext("Hello, world!"), "Hallo, Welt!")
		assertEq(Gettext("Good morning"),  "Guten Morgen")
		assertEq(Gettext("Good bye!"),     "Auf Wiedersehen!")
		assertEq(Sprintf(
			NGettext("An apple", "%d apples", 1),
			1,
			"garbage",
		), "Ein Apfel")
		assertEq(Sprintf(
			NGettext("An apple", "%d apples", 3),
			3,
		), "3 Äpfel")
	})

	testing("Français", func() {
		SetLocale(LC_MESSAGES, "fr_FR.UTF-8")

		assertEq(Gettext("Hello, world!"), "Hello, world!")
		assertEq(Gettext("Good morning"),  "Good morning")
		assertEq(Gettext("Good bye!"),     "Good bye!")
		assertEq(Sprintf(
			NGettext("An apple", "%d apples", 1),
			1,
			"garbage",
		), "An apple")
		assertEq(Sprintf(
			NGettext("An apple", "%d apples", 3),
			3,
		), "3 apples")
	})
}