import { addWeeks } from "date-fns";
import { describe, expect, test } from "vitest";
import type { BusyBlock, TimeRange } from "../availability-types";
import * as Availability from "./Availability";
import * as ScheduleWeek from "./ScheduleWeek";

const DAY_SECONDS = 24 * 60 * 60;
const TIMEZONE = "UTC";
const FRIDAY = 4;
const SATURDAY = 5;

describe("ScheduleWeek.memberRow", () => {
	test("shows a member free on Saturday when their Friday night range runs into their Saturday morning range", () => {
		const { fridayAt } = nextWeek();

		// what SAVE_WEEK stores for Fri 20:00-06:00 + Sat 06:00-10:00
		const slots = Availability.normalize([
			{ startsAt: fridayAt(20 * 60), endsAt: fridayAt(30 * 60) },
			{ startsAt: fridayAt(30 * 60), endsAt: fridayAt(34 * 60) },
		]);

		const row = rowWith({ slots });

		expect(row.days[SATURDAY].ranges).toEqual([
			{ startsAt: fridayAt(30 * 60), endsAt: fridayAt(34 * 60) },
		]);
	});

	test("keeps the whole reported range in reportedRanges when a commitment covers it", () => {
		const { fridayAt } = nextWeek();
		const slots = [{ startsAt: fridayAt(18 * 60), endsAt: fridayAt(23 * 60) }];

		const row = rowWith({
			slots,
			busy: [
				{
					type: "tournament",
					name: "Triton",
					startsAt: fridayAt(17 * 60),
					endsAt: fridayAt(23 * 60 + 30),
				},
			],
		});

		expect(row.days[FRIDAY].ranges).toEqual([]);
		expect(row.days[FRIDAY].reportedRanges).toEqual(slots);
	});

	test("cuts a commitment out of ranges but not out of reportedRanges", () => {
		const { fridayAt } = nextWeek();
		const slots = [{ startsAt: fridayAt(18 * 60), endsAt: fridayAt(23 * 60) }];

		const row = rowWith({
			slots,
			busy: [
				{
					type: "scrim",
					name: null,
					startsAt: fridayAt(19 * 60),
					endsAt: fridayAt(21 * 60),
				},
			],
		});

		expect(row.days[FRIDAY].ranges).toEqual([
			{ startsAt: fridayAt(18 * 60), endsAt: fridayAt(19 * 60) },
			{ startsAt: fridayAt(21 * 60), endsAt: fridayAt(23 * 60) },
		]);
		expect(row.days[FRIDAY].reportedRanges).toEqual(slots);
	});

	test("merges adjacent reported slots into one range", () => {
		const { fridayAt } = nextWeek();

		// the editor stores one row per painted span, so a 06:00-19:00 evening
		// arrives as two touching slots
		const row = rowWith({
			slots: [
				{ startsAt: fridayAt(6 * 60), endsAt: fridayAt(8 * 60) },
				{ startsAt: fridayAt(8 * 60), endsAt: fridayAt(19 * 60) },
			],
		});

		expect(row.days[FRIDAY].reportedRanges).toEqual([
			{ startsAt: fridayAt(6 * 60), endsAt: fridayAt(19 * 60) },
		]);
	});

	test("leaves reportedRanges empty for a week that was never filled in", () => {
		const { fridayAt } = nextWeek();

		const row = rowWith({
			slots: [],
			busy: [
				{
					type: "teamEvent",
					name: "Practice",
					startsAt: fridayAt(19 * 60),
					endsAt: fridayAt(21 * 60),
				},
			],
			reported: false,
		});

		expect(row.reported).toBe(false);
		expect(row.days[FRIDAY].reportedRanges).toEqual([]);
		expect(row.days[FRIDAY].busy).toHaveLength(1);
	});
});

function nextWeek() {
	const weekStartsAt = Availability.weekStartsAt(
		addWeeks(new Date(), 1),
		TIMEZONE,
	);
	const range = {
		startsAt: weekStartsAt,
		endsAt: weekStartsAt + 7 * DAY_SECONDS,
	};
	const days = ScheduleWeek.days(range, TIMEZONE);

	return {
		weekStartsAt,
		range,
		days,
		fridayAt: (minutes: number) =>
			Availability.dayMinutesToTimestamp({
				date: days[FRIDAY].date,
				minutes,
				timezone: TIMEZONE,
			}),
	};
}

function rowWith({
	slots,
	busy = [],
	reported = true,
}: {
	slots: Array<TimeRange>;
	busy?: Array<BusyBlock>;
	reported?: boolean;
}) {
	const { weekStartsAt, range, days } = nextWeek();

	return ScheduleWeek.memberRow({
		userId: 1,
		days,
		timezone: TIMEZONE,
		reportedWeeks: reported
			? [{ userId: 1, weekStartsAt, timezone: TIMEZONE, slots, dayNotes: [] }]
			: [],
		range,
		busy,
	});
}