export const gameName = "Optimle";

function mulberry32(a: number) {
    return function () {
        var t = (a += 0x6d2b79f5);
        t = Math.imul(t ^ (t >>> 15), t | 1);
        t ^= t + Math.imul(t ^ (t >>> 7), t | 61);
        return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
    };
}

export function urlParam(name: string): string | null {
    return new URLSearchParams(window.location.search).get(name);
}

export const seed = Number(urlParam("seed"));
const makeRandom = () => (seed ? mulberry32(seed) : () => Math.random());
let random = makeRandom();

export function resetRng(): void {
    random = makeRandom();
}

export function pick<T>(array: Array<T>): T {
    return array[Math.floor(array.length * random())];
}

// https://a11y-guidelines.orange.com/en/web/components-examples/make-a-screen-reader-talk/
export function speak(
    text: string,
    priority: "polite" | "assertive" = "assertive"
) {
    var el = document.createElement("div");
    var id = "speak-" + Date.now();
    el.setAttribute("id", id);
    el.setAttribute("aria-live", priority || "polite");
    el.classList.add("sr-only");
    document.body.appendChild(el);

    window.setTimeout(function () {
        document.getElementById(id)!.innerHTML = text;
    }, 100);

    window.setTimeout(function () {
        document.body.removeChild(document.getElementById(id)!);
    }, 1000);
}

export function ordinal(n: number): string {
    return n + ([, "st", "nd", "rd"][(n % 100 >> 3) ^ 1 && n % 10] || "th");
}

export const englishNumbers =
    "zero one two three four five six seven eight nine ten eleven".split(" ");

export function describeSeed(seed: number): string {
    const year = Math.floor(seed / 10000);
    const month = Math.floor(seed / 100) % 100;
    const day = seed % 100;
    const isLeap = year % (year % 25 ? 4 : 16) === 0;
    const feb = isLeap ? 29 : 28;
    const days = [0, 31, feb, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
    if (
        year >= 2000 &&
        year <= 2100 &&
        month >= 1 &&
        month <= 12 &&
        day >= 1 &&
        day <= days[month]
    ) {
        return new Date(year, month - 1, day).toLocaleDateString("en-US", {
            day: "numeric",
            month: "long",
            year: "numeric",
        });
    } else {
        return "seed " + seed;
    }
}