import { describe, expect, it } from "@suaveplan/testing/runner";
import { DATE_FORMAT_PRESETS, PRESET_MAP, resolvePreset } from "./presets.js";

describe("PRESET_MAP", () => {
    it("contains all 8 entries", { timeout: 5000 }, () => {
        const keys = Object.keys(PRESET_MAP).sort();
        expect(keys).toEqual(
            [
                "date-long",
                "date-short",
                "full",
                "long",
                "medium",
                "short",
                "time-long",
                "time-short",
            ].sort()
        );
    });

    it("short includes year, month, day, hour, minute", {
        timeout: 5000,
    }, () => {
        expect(PRESET_MAP.short).toMatchObject({
            year: "numeric",
            month: "numeric",
            day: "numeric",
            hour: "numeric",
            minute: "numeric",
        });
    });

    it("full includes weekday + timeZoneName long", { timeout: 5000 }, () => {
        expect(PRESET_MAP.full).toMatchObject({
            weekday: "long",
            timeZoneName: "long",
        });
    });

    it("date-short omits time fields", { timeout: 5000 }, () => {
        const keys = Object.keys(PRESET_MAP["date-short"]);
        expect(keys).not.toContain("hour");
        expect(keys).not.toContain("minute");
    });
});

describe("DATE_FORMAT_PRESETS", () => {
    it("lists all 8 preset names", { timeout: 5000 }, () => {
        expect(DATE_FORMAT_PRESETS).toHaveLength(8);
    });
});

describe("resolvePreset", () => {
    it("returns undefined for undefined options", { timeout: 5000 }, () => {
        expect(resolvePreset()).toBeUndefined();
    });

    it("returns rest options when no preset present", { timeout: 5000 }, () => {
        const r = resolvePreset({ year: "numeric" });
        expect(r).toMatchObject({ year: "numeric" });
    });

    it("merges preset map with rest options", { timeout: 5000 }, () => {
        const r = resolvePreset({ preset: "short", month: "long" });
        expect(r).toMatchObject({
            year: "numeric",
            month: "long",
            day: "numeric",
            hour: "numeric",
            minute: "numeric",
        });
    });

    it("strips locale from rest options", { timeout: 5000 }, () => {
        const r = resolvePreset({ preset: "short", locale: "en-GB" });
        expect(r).not.toHaveProperty("locale");
    });
});