"""Тесты разбора листов: группы, дни/пары/чётность, индексы, вспомогательные листы."""

from datetime import date

import pytest

from fixtures import fixture_sheets, make_sheets
from schedule import parsing
from schedule.errors import ScheduleError


@pytest.fixture()
def sheets():
    return make_sheets(fixture_sheets())


@pytest.fixture()
def data(sheets):
    return parsing.parse_schedule(sheets)


def test_hidden_group_excluded(data):
    assert set(data) == {"ИВТ-11БО", "ИТ-12БО"}


def test_semester(data):
    assert data["ИВТ-11БО"]["semester_until"] == "11.01.27"
    assert data["ИТ-12БО"]["semester_until"] == "29.12.26"


def test_day_period_parity(data):
    mon = data["ИВТ-11БО"]["days"]["понедельник"]
    p1 = mon[1]
    assert p1["time"] == "9:00-10:35"
    assert p1["ч"] is not None and p1["з"] is not None
    assert "Математика" in p1["ч"]
    assert "216" in p1["з"]


def test_empty_parity_slot_kept(data):
    mon = data["ИТ-12БО"]["days"]["понедельник"]
    assert mon[1]["з"] is None
    # время на пустой слот подставлено
    assert mon[1]["time"] == "9:00-10:35"


def test_lessons_preparsed(data):
    mon = data["ИВТ-11БО"]["days"]["понедельник"]
    lesson = mon[1]["lessons"]["ч"][0]
    assert lesson["subject"] == "Математика"
    assert lesson["teacher"] == "Смирнов А.В."
    assert lesson["room"] == "ауд. 215"
    assert lesson["note"] == "пара 14.09 не будет"
    # пустое parity -> None
    assert data["ИТ-12БО"]["days"]["понедельник"][1]["lessons"]["з"] is None


def test_marker_parsed(data):
    mon_g1 = data["ИВТ-11БО"]["days"]["понедельник"]
    mon_g2 = data["ИТ-12БО"]["days"]["понедельник"]
    assert mon_g1[2]["lessons"]["ч"][0]["marker"] == "к.в. - 2"
    assert mon_g2[2]["lessons"]["з"][0]["marker"] == "к.в."


def test_tuesday_only_ch(data):
    tue = data["ИВТ-11БО"]["days"]["вторник"]
    assert tue[1]["ч"] and "Биология" in tue[1]["ч"]
    assert tue[1]["з"] is None


def test_missing_main_sheet(sheets):
    del sheets[parsing.MAIN_SHEET]
    with pytest.raises(ScheduleError):
        parsing.parse_schedule(sheets)


def test_odd_day_block_warns(caplog):
    sheets = make_sheets(fixture_sheets())
    # уберём вторую строку понедельника (пара 1, з) -> нечётное число строк
    rows = sheets[parsing.MAIN_SHEET].rows
    # строки: 0 header, 1 с/по, 2..5 понедельник, 6..7 вторник
    del rows[3]
    with caplog.at_level("WARNING"):
        result = parsing.parse_schedule(sheets)
    assert any("сдвинуться" in r.message for r in caplog.records)
    # разбор всё равно завершается
    assert "ИВТ-11БО" in result


def test_week_ranges(sheets):
    weeks = parsing.extract_week_ranges(sheets)
    assert len(weeks) == 8
    assert weeks[0] == {"parity": "ч", "start": date(2026, 8, 31), "end": date(2026, 9, 6)}
    assert weeks[1]["parity"] == "з"
    assert weeks[-2]["parity"] == "ч"


def test_current_parity():
    sheets = make_sheets(fixture_sheets())
    weeks = parsing.extract_week_ranges(sheets)
    assert parsing.current_parity(weeks, date(2026, 9, 1)) == "ч"
    assert parsing.current_parity(weeks, date(2026, 9, 9)) == "з"
    assert parsing.current_parity(weeks, date(2030, 1, 1)) is None


def test_teacher_room_index(data):
    teachers, rooms = parsing.build_teacher_room_index(data)
    assert set(teachers) == {"Смирнов А.В.", "Иванов И.И.", "Петров П.П.", "Сидорова С.С."}

    smirnov = teachers["Смирнов А.В."]["понедельник"]["1"]
    assert len(smirnov["ч"]) == 1 and len(smirnov["з"]) == 1
    assert smirnov["ч"][0]["subject"] == "Математика"
    assert smirnov["ч"][0]["room"] == "ауд. 215"
    assert smirnov["ч"][0]["groups"] == ["ИВТ-11БО"]

    petrov_zn = teachers["Петров П.П."]["понедельник"]["2"]["з"]
    assert petrov_zn[0]["marker"] == "к.в."

    assert set(rooms) == {"ауд. 215", "ауд. 216", "ауд. 301", "ауд. 220", "ауд. 201"}
    room_301 = rooms["ауд. 301"]["понедельник"]
    assert room_301["1"]["ч"][0]["subject"] == "Физика"
    assert room_301["1"]["ч"][0]["teacher"] == "Иванов И.И."
    assert room_301["2"]["ч"][0]["groups"] == ["ИВТ-11БО"]


def test_day_times(data):
    times = parsing.build_day_times(data)
    assert times["понедельник"] == {"1": "9:00-10:35", "2": "10:45-12:20"}
    assert times["вторник"] == {"1": "9:00-10:35"}


def test_group_schedule_shape(data):
    out = parsing.build_group_schedule(data, "ИВТ-11БО")
    assert out["group"] == "ИВТ-11БО"
    assert out["semester_until"] == "11.01.27"
    p1 = out["days"]["понедельник"]["1"]
    assert p1["time"] == "9:00-10:35"
    assert "raw" in p1["ч"] and "lessons" in p1["ч"]
    assert p1["з"]["lessons"][0]["room"] == "ауд. 216"
    assert parsing.build_group_schedule(data, "НЕТ-11БО") is None


def test_rooms_info(sheets):
    info = parsing.parse_rooms_info(sheets)
    assert info == {
        "ауд. 215": {"room": "ауд. 215", "info": "комп.класс, 12 мест"},
        "ауд. 301": {"room": "ауд. 301", "info": "интерактивная панель, 24 места"},
        "ауд. 220": {"room": "ауд. 220", "info": "20 мест"},
    }


def test_teachers_full(sheets):
    full = parsing.parse_teachers_full(sheets)
    assert full == {
        "Смирнов А.В.": "Смирнов Александр Викторович",
        "Иванов И.И.": "Иванов Иван Иванович",
    }


def test_sort_rooms():
    assert parsing.sort_rooms(["ауд. 10", "ауд. 9", "ауд. 100", "зал"]) == [
        "ауд. 9", "ауд. 10", "ауд. 100", "зал",
    ]


def test_build_room_schedule(data):
    _, rooms = parsing.build_teacher_room_index(data)
    times = parsing.build_day_times(data)
    out = parsing.build_room_schedule(rooms, "ауд. 301", times)
    # дни с расписанием плюс дни, где есть время пар (даже без занятий)
    assert set(out["days"]) == {"понедельник", "вторник"}
    assert out["days"]["понедельник"]["1"]["ч"][0]["subject"] == "Физика"
    assert parsing.build_room_schedule(rooms, "ауд. 999", times) is None