// ==UserScript==
// @name        Screen Time Restrictor
// @namespace   https://github.com/nick-ng/dev-settings/violentmonkey
// @match       https://www.youtube.com/*
// @match       https://www.reddit.com/*
// @match       https://old.reddit.com/*
// @match       https://www.twitch.tv/*
// @match       https://www.wowhead.com/*
// @match       https://www.icy-veins.com/*
// @match       https://www.mmo-champion.com/*
// @match       https://*.fandom.com/*
// @grant       none
// @version     1.4
// @author      https://github.com/nick-ng
// @description Navigates you away from a page after some time and only lets you back after another amount of time.
// @downloadURL https://raw.githubusercontent.com/nick-ng/dev-settings/master/violentmonkey/screen-time-restrictor.js
// @run-at      document-idle
// ==/UserScript==

(() => {
	const ID = "4e55fbb7-b720-4de9-b85d-f8e6af0f377c";
	const RESTRICT_START_TIMESTAMP_STORE = `${ID}-start-timestamp`;
	const RESTRICT_END_TIMESTAMP_STORE = `${ID}-end-timestamp`;

	const extraMinutes =
		(Date.now() - 1676925246579) / (1000 * 60 * 60 * 24 * 60);
	const TIME_ON_PAGE_MINUTES = 5 + Math.max(0, 5 - extraMinutes);
	const COOLDOWN_MINUTES = 30 + extraMinutes;
	console.log("TIME_ON_PAGE_MINUTES", TIME_ON_PAGE_MINUTES);
	console.log("COOLDOWN_MINUTES", COOLDOWN_MINUTES);

	const TIME_ON_PAGE_MS = Math.floor(TIME_ON_PAGE_MINUTES * 60 * 1000);
	const COOLDOWN_MS = Math.ceil(COOLDOWN_MINUTES * 60 * 1000);

	const getNewTimestamps = () => ({
		start: Date.now() + TIME_ON_PAGE_MS,
		end: Date.now() + TIME_ON_PAGE_MS + COOLDOWN_MS,
	});

	const startTimestampRaw = localStorage.getItem(
		RESTRICT_START_TIMESTAMP_STORE
	);
	const restrictStartTimestamp =
		typeof startTimestampRaw === "string"
			? parseInt(startTimestampRaw, 10)
			: getNewTimestamps().start;

	const endTimestampRaw = localStorage.getItem(RESTRICT_END_TIMESTAMP_STORE);
	const restrictEndTimestamp =
		typeof endTimestampRaw === "string"
			? parseInt(endTimestampRaw, 10)
			: getNewTimestamps().end;

	if (
		typeof startTimestampRaw !== "string" ||
		typeof endTimestampRaw !== "string"
	) {
		localStorage.setItem(
			RESTRICT_START_TIMESTAMP_STORE,
			getNewTimestamps().start
		);

		localStorage.setItem(
			RESTRICT_END_TIMESTAMP_STORE,
			getNewTimestamps().end
		);
	}

	// After the cooldown
	if (Date.now() > restrictEndTimestamp) {
		localStorage.setItem(
			RESTRICT_START_TIMESTAMP_STORE,
			getNewTimestamps().start
		);

		localStorage.setItem(
			RESTRICT_END_TIMESTAMP_STORE,
			getNewTimestamps().end
		);

		setTimeout(() => {
			location.assign("https://developer.mozilla.org");
		}, TIME_ON_PAGE_MS);

		return;
	}

	// Before the start time
	if (Date.now() < restrictStartTimestamp) {
		const remainingMS = restrictStartTimestamp - Date.now();

		setTimeout(() => {
			location.assign("https://developer.mozilla.org");
		}, remainingMS);

		return;
	}

	location.assign("https://developer.mozilla.org");
})();