import { describe, expect, it } from "@suaveplan/testing/runner";
import { LOCALE_BCP47_MAP } from "./locale-bcp47-map.js";

describe("LOCALE_BCP47_MAP", () => {
    it("short code en maps to en-GB", { timeout: 5000 }, () => {
        expect(LOCALE_BCP47_MAP["en"]).toBe("en-GB");
    });

    it("mixed-case zh-cn maps to zh-CN", { timeout: 5000 }, () => {
        expect(LOCALE_BCP47_MAP["zh-cn"]).toBe("zh-CN");
    });

    it("short code zh maps to zh-CN", { timeout: 5000 }, () => {
        expect(LOCALE_BCP47_MAP["zh"]).toBe("zh-CN");
    });

    it("pt-br maps to pt-BR", { timeout: 5000 }, () => {
        expect(LOCALE_BCP47_MAP["pt-br"]).toBe("pt-BR");
    });

    it("RTL languages map to canonical region tags", { timeout: 5000 }, () => {
        expect(LOCALE_BCP47_MAP["ar"]).toBe("ar-SA");
        expect(LOCALE_BCP47_MAP["he"]).toBe("he-IL");
        expect(LOCALE_BCP47_MAP["fa"]).toBe("fa-IR");
    });

    it("returns undefined for unknown codes (consumer handles miss)", {
        timeout: 5000,
    }, () => {
        expect(LOCALE_BCP47_MAP["xx-yy"]).toBeUndefined();
        expect(LOCALE_BCP47_MAP["klingon"]).toBeUndefined();
    });

    it("every value follows the BCP-47 lang-REGION shape", {
        timeout: 5000,
    }, () => {
        const bcp47Pattern = /^[a-z]{2,3}-[A-Z]{2}$/;
        for (const value of Object.values(LOCALE_BCP47_MAP)) {
            expect(value).toMatch(bcp47Pattern);
        }
    });

    it("every key is lowercase", { timeout: 5000 }, () => {
        for (const key of Object.keys(LOCALE_BCP47_MAP)) {
            expect(key).toBe(key.toLowerCase());
        }
    });

    it("contains the documented 22 entries", { timeout: 5000 }, () => {
        expect(Object.keys(LOCALE_BCP47_MAP)).toHaveLength(22);
    });
});