"""Unit tests for the planning domain dataclasses.

These tests deliberately avoid spinning up the JVM-backed solver — they
only verify that the domain objects construct, serialise, and compare as
expected. The full solver lifecycle is exercised by integration tests run
against a populated DB (Phase 8).
"""

from app.domain import Lesson, Room, SchoolClass, Subject, Teacher, Timeslot


def _ts() -> Timeslot:
    return Timeslot(id="ts1", day_of_week=1, period_index=1, start_time="08:00", end_time="08:45")


def _room() -> Room:
    return Room(id="r1", name="A101", room_type="standard")


def _teacher() -> Teacher:
    return Teacher(id="t1", last_name="Schmidt", first_name="Anna", short_code="SCH")


def _class() -> SchoolClass:
    return SchoolClass(id="c1", name="5a", grade_level=5)


def _subject() -> Subject:
    return Subject(id="s1", name="Mathematik", short_code="M")


def test_timeslot_str() -> None:
    assert str(_ts()) == "D1P1"


def test_teacher_str() -> None:
    assert str(_teacher()) == "Schmidt, Anna"


def test_lesson_starts_unassigned() -> None:
    lesson = Lesson(id="L1", school_class=_class(), subject=_subject(), teacher=_teacher())
    assert lesson.timeslot is None
    assert lesson.room is None


def test_lesson_accepts_assignment() -> None:
    lesson = Lesson(id="L1", school_class=_class(), subject=_subject(), teacher=_teacher())
    lesson.timeslot = _ts()
    lesson.room = _room()
    assert lesson.timeslot.day_of_week == 1
    assert lesson.room.name == "A101"