import test from "node:test";
import assert from "node:assert/strict";
import { readFileSync } from "node:fs";
import { parseDocx } from "../server/parser.js";
import { parseWeeksDocx, parseBellsDocx } from "../server/calendar.js";
import {
  parseWeekRanges,
  parseTextDates,
  lessonWeeks,
  lessonDates,
  dateInWeek,
  weekIndexOf,
  todayIso,
} from "../shared/weeks.js";
const fixture = (name) =>
  readFileSync(new URL(`./fixtures/${name}.docx`, import.meta.url));
const calendar = {
  weeks: parseWeeksDocx(fixture("weeks")),
  bells: parseBellsDocx(fixture("bells")),
};
const fef = () =>
  parseDocx(fixture("fef-23-ba"), { name: "23-ЛГ_23-БА.docx" }).lessons.filter(
    (l) => l.groups.includes("23-БА"),
  );

test("Таблица недель: 18 недель, нечётные белые, неделя 1 со вторника", () => {
  const { weeks } = calendar;
  assert.equal(weeks.length, 18);
  assert.deepEqual(weeks[0], {
    n: 1,
    start: "2026-09-01",
    end: "2026-09-06",
    color: "white",
  });
  assert.deepEqual(weeks.at(-1), {
    n: 18,
    start: "2026-12-28",
    end: "2027-01-03",
    color: "green",
  });
  assert.ok(weeks.every((w) => (w.n % 2 ? "white" : "green") === w.color));
  assert.equal(dateInWeek(weeks[0], 1), null);
  assert.equal(dateInWeek(weeks[0], 2), "2026-09-01");
  assert.equal(weekIndexOf(calendar, "2026-10-16"), 6);
  assert.equal(weekIndexOf(calendar, "2027-02-01"), -1);
  assert.equal(todayIso(new Date("2026-10-15T22:30:00Z")), "2026-10-16");
});
test("Звонки: восемь пар с половинами", () => {
  assert.equal(calendar.bells.length, 8);
  assert.deepEqual(calendar.bells[1], {
    pair: 2,
    start: "10:05",
    end: "11:30",
    halves: [
      ["10:05", "10:45"],
      ["10:50", "11:30"],
    ],
  });
});
test("Пометки недель: диапазоны, «с N», опечатки остаются для сверки", () => {
  assert.deepEqual(parseWeekRanges("1-4,6-11н."), [
    [1, 4],
    [6, 11],
  ]);
  assert.deepEqual(parseWeekRanges("со 2 нед."), [[2, null]]);
  assert.deepEqual(parseWeekRanges("1-4н.;6-12н."), [[1, 4], [6, 12]]);
  assert.deepEqual(parseWeekRanges("1-6н , 13-18н"), [[1, 6], [13, 18]]);
  assert.deepEqual(parseWeekRanges("с 4-16н"), [[4, 16]]);
  assert.deepEqual(parseWeekRanges("1-8,10-17"), [
    [1, 8],
    [10, 17],
  ]);
  assert.equal(parseWeekRanges("2,6-12-16н"), null);
  assert.equal(parseWeekRanges("26.10"), null);
  assert.equal(parseWeekRanges(""), null);
});
test("Цвет строки ограничивает диапазон чётностью недели", () => {
  const white = { day: 2, date: null, condition: "13-17н", variant: "upper" };
  const green = { day: 4, date: null, condition: "4-12н", variant: "lower" };
  const every = { day: 5, date: null, condition: "6-13н", variant: "all" };
  const plain = { day: 1, date: null, condition: "", variant: "lower" };
  assert.deepEqual(lessonWeeks(white, 18), [13, 15, 17]);
  assert.deepEqual(lessonWeeks(green, 18), [4, 6, 8, 10, 12]);
  assert.deepEqual(lessonWeeks(every, 18), [6, 7, 8, 9, 10, 11, 12, 13]);
  assert.deepEqual(lessonWeeks(plain, 18), [2, 4, 6, 8, 10, 12, 14, 16, 18]);
  assert.equal(
    lessonWeeks({ ...white, condition: "2,6-12-16н" }, 18),
    null,
  );
  assert.deepEqual(lessonDates(every, calendar).slice(0, 2), [
    "2026-10-09",
    "2026-10-16",
  ]);
});
test("Парсер: 23-БА получает номера недель и даты дня информирования", () => {
  const lessons = fef();
  const friday = lessons.filter((l) => l.day === 5 && l.start === "10:05");
  assert.deepEqual(
    friday.map((l) => l.weekRanges),
    [[[1, 4], [6, 11]], [[12, 15]], [[16, 16]]],
  );
  const week7 = friday.filter((l) => lessonWeeks(l, 18).includes(7));
  assert.deepEqual(
    week7.map((l) => l.subject),
    ["PR-менеджмент"],
  );
  const info = lessons.find((l) =>
    l.subject.startsWith("Единый день информирования"),
  );
  assert.deepEqual(info.dates, [
    "2026-09-10",
    "2026-10-15",
    "2026-11-19",
    "2026-12-17",
  ]);
  assert.deepEqual(parseTextDates("17 декабря и 14 января", 2026), [
    "2026-12-17",
    "2027-01-14",
  ]);
  // Every coloured-row mark in the real document agrees with the week table.
  for (const l of lessons.filter((l) => l.variant !== "all" && l.weekRanges))
    for (const [a, b] of l.weekRanges)
      for (const n of [a, b ?? a])
        assert.equal(n % 2, l.variant === "upper" ? 1 : 0, l.raw);
});

test("Даты числами: «10.09;15.10;19.11;17.12», но не время пары", () => {
  // ИСФ пишет дни информирования списком дат, как в 23-АРХ.
  assert.deepEqual(parseTextDates("Единый день информирования 10.09;15.10;19.11;17.12", 2026), [
    "2026-09-10",
    "2026-10-15",
    "2026-11-19",
    "2026-12-17",
  ]);
  assert.deepEqual(parseTextDates("03.10, 17.10. Физика", 2026), ["2026-10-03", "2026-10-17"]);
  assert.deepEqual(parseTextDates("12.01.2027; 19.01.2027 Экзамен", 2026), ["2027-01-12", "2027-01-19"]);
  // One number pair alone or a time range is a time, not a date.
  for (const time of ["10.05 Лекция", "10.05-11.30", "16.50 Информационный час", "09.11 по 06.12 практика"])
    assert.deepEqual(parseTextDates(time, 2026), [], time);
});