//! {"permissions": ["network"], "require": ["libencoding", "libhttp"]}

let libhttp = require("libhttp");

async function getEvents() {
	let now = new Date();
	let cacheVersion = "1";
	let useCache = await database.get("cacheVersion") == cacheVersion;
	let events = [];
	let url = "https://api.meetup.com/The-Most-Informal-Running-Club-Ever-TMIRCE-Upstate/events?&sign=true&photo-host=public&status=past";
	let done = false;
	while (!done) {
		let response;
		if (useCache) {
			response = await database.get(url);
			if (response) {
				response = JSON.parse(response);
			}
		}
		if (!response) {
			response = await libhttp.get(url);
			await database.set(url, JSON.stringify(response));
		}
		let nextLink;
		let theseEvents = JSON.parse(response.body);
		for (let j in theseEvents) {
			if (new Date(theseEvents[j].time) < now) {
				events.push(theseEvents[j]);
			} else {
				done = true;
				break;
			}
		}
		for (let j in response.headerArray) {
			let link = response.headerArray[j];
			if (link[0] == "Link" && link[1].split("; ")[1] == 'rel="next"') {
				link = link[1].split("; ")[0];
				link = link.substring(1, link.length - 1);
				nextLink = link;
			}
		}
		if (nextLink) {
			url = nextLink;
		} else {
			break;
		}
	}
	await database.set("cacheVersion", cacheVersion);
	return events;
}

async function trackWorkouts(events) {
	for (let i in events) {
		let event = events[i];
		if (event && event.venue && event.venue.name
			&& new Date(event.time).getDay() == 1) {
			let match = /follow (?:my|our) (.*?) workout/.exec(event.description);
			let workout;
			if (match) {
				workout = match[1];
			} else if (/snowshoe/.exec(event.description)
				|| /No run/.exec(event.description)) {
				// nothing
			} else {
				terminal.print(event.description);
			}
			if (workout) {
				terminal.print(workout);
			}
		}
	}
}

async function locationByDay(day, events) {
	for (let i in events) {
		let event = events[i];
		if (event && event.venue && event.venue.name
			&& new Date(event.time).getDay() == day) {
			terminal.print(event.venue.name);
		}
	}
}

async function redisplay(action, actions, events) {
	terminal.clear();
	if (actions[action]) {
		terminal.setHash(action);
		terminal.print({style: "font-size: xx-large", value: action});
	}
	for (let i in actions) {
		terminal.print({command: i});
	}
	if (actions[action]) {
		await actions[action](events);
	}
}

async function main() {
	terminal.print("loading events...");
	let events = await getEvents();
	terminal.print("loaded ", events.length.toString(), " events");

	let actions = {
		"Sunday Locations": locationByDay.bind(null, 0),
		"Monday Track Workouts": trackWorkouts,
		"Tuesday Locations": locationByDay.bind(null, 2),
		"Wednesday Locations": locationByDay.bind(null, 3),
		"Thursday Locations": locationByDay.bind(null, 4),
		"Friday Locations": locationByDay.bind(null, 5),
		"Saturday Locations": locationByDay.bind(null, 6),
	}

	core.register("hashChange", function(event) {
		if (event.hash && event.hash[0] == '#') {
			terminal.clear();
			let hash = event.hash.substring(1);
			redisplay(hash, actions, events);
		}
	});

	let action = null;
	while (true) {
		redisplay(action, actions, events);
		action = await terminal.readLine();
	}
}

main().catch(terminal.print);