"""Tests unitaires pour le module iCal : téléchargement et parsing.

Ce module teste :
- La récupération du flux iCal (file://, HTTP)
- Le parsing des événements en modèles Lesson, SchoolEvent
- L'extraction et normalisation des devoirs
- La collecte et déduplication des devoirs par date cible

Les tests utilisent des mocks pour éviter tout appel réseau réel.
"""

from __future__ import annotations

import tempfile
import urllib.parse
from datetime import date, datetime
from pathlib import Path

import pytest
import responses

from pronote_sync.models.agenda import HomeworkBlock, Lesson, LessonStatus
from pronote_sync.sources.pronote.ical import (
    collect_homeworks,
    fetch_ical,
    generate_homework_id,
    get_calendar_name,
    normalize_homework_text,
    parse_body,
    parse_ical,
)


@pytest.fixture
def valid_ical_content() -> str:
    """Contenu iCal valide pour tests de parsing."""
    return """BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Test//Test//FR
X-WR-CALNAME:Test Calendar
BEGIN:VEVENT
UID:test-1@test.net
DTSTAMP:20260905T120000Z
DTSTART:20260905T080000Z
DTEND:20260905T090000Z
SUMMARY:Math
CATEGORIES:Cours
DESCRIPTION:<div>Matière : Math\nProfesseur : M. Dupont\nSalle : 204\n<strong>Contenu pédagogique :</strong>Résoudre des équations.</div>
END:VEVENT
END:VCALENDAR
"""


@pytest.fixture
def invalid_ical_content() -> str:
    """Contenu iCal invalide (sans BEGIN:VCALENDAR)."""
    return "INVALID:CONTENT\nThis is not a valid iCal file."


def test_fetch_ical_file_protocol() -> None:
    """fetch_ical("file://tests/fixtures/pronote-4e.ics") retourne un contenu commençant par BEGIN:VCALENDAR.

    :return: None
    """
    fixture_path = Path(__file__).parent.parent / "fixtures" / "pronote-4e.ics"
    url = f"file://{fixture_path}"

    content = fetch_ical(url)
    assert content.lstrip().startswith("BEGIN:VCALENDAR")


def test_fetch_ical_file_uri_decoding() -> None:
    """fetch_ical("file://path%20with%20spaces") décode correctement le chemin.

    :return: None
    """
    # Créer un fichier temporaire avec un espace dans le nom
    with tempfile.TemporaryDirectory() as tmpdir:
        temp_path = Path(tmpdir) / "fichier avec espaces.ics"
        temp_path.write_text(
            "BEGIN:VCALENDAR\nVERSION:2.0\nPRODID:-//Test//Test//FR\nEND:VCALENDAR",
            encoding="utf-8",
        )

        # URL encodée avec espace
        encoded_name = urllib.parse.quote("fichier avec espaces.ics")
        url = f"file://{tmpdir}/{encoded_name}"

        # Cela devrait fonctionner car Path.read_text décode l'URL
        content = fetch_ical(url)
        assert content.lstrip().startswith("BEGIN:VCALENDAR")


@responses.activate
def test_fetch_ical_invalid_content() -> None:
    """Si le contenu ne commence pas par BEGIN:VCALENDAR, une exception est levée.

    :return: None
    """
    responses.add(
        responses.GET,
        "https://example.com/ical.ics",
        body="INVALID:CONTENT",
        status=200,
    )

    with pytest.raises(ValueError, match="Flux iCal invalide"):
        fetch_ical("https://example.com/ical.ics")


@responses.activate
def test_fetch_ical_http() -> None:
    """Mock de requests.get pour retourner un contenu iCal valide.

    :return: None
    """
    valid_content = "BEGIN:VCALENDAR\nVERSION:2.0\nPRODID:-//Test//Test//FR\nEND:VCALENDAR"

    responses.add(
        responses.GET,
        "https://pronote.example.com/ical.ics",
        body=valid_content,
        status=200,
    )

    content = fetch_ical("https://pronote.example.com/ical.ics")
    assert content == valid_content


@responses.activate
def test_fetch_ical_redacts_errors() -> None:
    """Les messages d'erreur ne contiennent pas l'URL complète (doit être masquée).

    :return: None
    """
    responses.add(
        responses.GET,
        "https://pronote.example.com/ical.ics",
        body=Exception("Erreur réseau"),
        status=500,
    )

    with pytest.raises(Exception) as exc_info:
        fetch_ical("https://pronote.example.com/ical.ics?token=secret123")

    error_msg = str(exc_info.value)
    # Vérifie que le token secret n'est pas dans le message
    assert "secret123" not in error_msg
    # Vérifie que l'URL est masquée (utilise redact_url)
    assert "https://pronote.example.com/ical.ics" in error_msg
    # Le message doit contenir la partie masquée
    assert "...ics" in error_msg or "pronote.example.com/ical" in error_msg


def test_get_calendar_name() -> None:
    """get_calendar_name(raw_ical) retourne le nom du calendrier.

    :return: None
    """
    fixture_path = Path(__file__).parent.parent / "fixtures" / "pronote-4e.ics"
    with open(fixture_path, encoding="utf-8") as f:
        content = f.read()

    name = get_calendar_name(content)
    assert name == "Classe de 4e"


def test_get_calendar_name_with_params() -> None:
    """Test avec X-WR-CALNAME;LANGUAGE=fr:TestName.

    :return: None
    """
    raw_ical = """BEGIN:VCALENDAR
X-WR-CALNAME;LANGUAGE=fr:TestName
END:VCALENDAR
"""
    name = get_calendar_name(raw_ical)
    assert name == "TestName"


def test_get_calendar_name_none() -> None:
    """Retourne None si X-WR-CALNAME est absent.

    :return: None
    """
    raw_ical = """BEGIN:VCALENDAR
VERSION:2.0
END:VCALENDAR
"""
    name = get_calendar_name(raw_ical)
    assert name is None


def test_parse_ical_returns_lessons() -> None:
    """parse_ical(fixture_content) retourne au moins 2 cours.

    :return: None
    """
    fixture_path = Path(__file__).parent.parent / "fixtures" / "pronote-4e.ics"
    with open(fixture_path, encoding="utf-8") as f:
        content = f.read()

    lessons, homeworks, school_events = parse_ical(content)
    assert len(lessons) >= 2


def test_parse_ical_detects_cancelled_course() -> None:
    """Un cours a status == LessonStatus.CANCELLED.

    :return: None
    """
    fixture_path = Path(__file__).parent.parent / "fixtures" / "pronote-4e.ics"
    with open(fixture_path, encoding="utf-8") as f:
        content = f.read()

    lessons, _, _ = parse_ical(content)
    cancelled_lessons = [lesson for lesson in lessons if lesson.status == LessonStatus.CANCELLED]
    assert len(cancelled_lessons) >= 1


def test_parse_ical_returns_school_events() -> None:
    """Au moins 1 événement scolaire est retourné.

    :return: None
    """
    fixture_path = Path(__file__).parent.parent / "fixtures" / "pronote-4e.ics"
    with open(fixture_path, encoding="utf-8") as f:
        content = f.read()

    _, _, school_events = parse_ical(content)
    assert len(school_events) >= 1


def test_parse_ical_homeworks_empty() -> None:
    """La liste des devoirs est toujours vide depuis parse_ical.

    :return: None
    """
    fixture_path = Path(__file__).parent.parent / "fixtures" / "pronote-4e.ics"
    with open(fixture_path, encoding="utf-8") as f:
        content = f.read()

    _, homeworks, _ = parse_ical(content)
    assert homeworks == []


def test_parse_ical_lesson_fields() -> None:
    """Vérifie qu'un cours a les bons champs (matière, profs, salles).

    :return: None
    """
    fixture_path = Path(__file__).parent.parent / "fixtures" / "pronote-4e.ics"
    with open(fixture_path, encoding="utf-8") as f:
        content = f.read()

    lessons, _, _ = parse_ical(content)
    assert len(lessons) > 0

    # Vérifions le premier cours (Mathématiques)
    lesson = lessons[0]
    assert lesson.subject == "Mathématiques"
    assert lesson.teachers == ("M. Dupont",)
    assert lesson.rooms == ("204",)
    assert lesson.status == LessonStatus.NORMAL


def test_collect_homeworks_dedup() -> None:
    """Étant donné des cours avec des blocs de devoirs, collect_homeworks retourne des devoirs dédupliqués.

    :return: None
    """
    # Créer des cours avec des blocs de devoirs en double
    lesson1 = Lesson(
        id="lesson1",
        start=datetime(2026, 9, 10, 8, 0),
        end=datetime(2026, 9, 10, 9, 0),
        subject="Math",
        teachers=("M. Dupont",),
        rooms=("204",),
        group=None,
        status=LessonStatus.NORMAL,
        content=None,
        homework_blocks=(
            HomeworkBlock(
                kind="due",
                date=date(2026, 9, 10),
                text="Exercice 1 à 5 page 42",
                html="<p>Exercice 1 à 5 page 42</p>",
            ),
        ),
    )

    lesson2 = Lesson(
        id="lesson2",
        start=datetime(2026, 9, 10, 10, 0),
        end=datetime(2026, 9, 10, 11, 0),
        subject="Physique",
        teachers=("M. Martin",),
        rooms=("205",),
        group=None,
        status=LessonStatus.NORMAL,
        content=None,
        homework_blocks=(
            HomeworkBlock(
                kind="due",
                date=date(2026, 9, 10),
                text="Exercice 1 à 5 page 42",
                html="<p>Exercice 1 à 5 page 42</p>",
            ),
        ),
    )

    homeworks = collect_homeworks([lesson1, lesson2], target_date=date(2026, 9, 10))
    assert len(homeworks) == 1  # Un seul devoir dédupliqué


def test_collect_homeworks_id_stability() -> None:
    """Deux devoirs avec le même texte et date d'échéance produisent le même ID.

    :return: None
    """
    lesson1 = Lesson(
        id="lesson1",
        start=datetime(2026, 9, 10, 8, 0),
        end=datetime(2026, 9, 10, 9, 0),
        subject="Math",
        teachers=("M. Dupont",),
        rooms=("204",),
        group=None,
        status=LessonStatus.NORMAL,
        content=None,
        homework_blocks=(
            HomeworkBlock(
                kind="due",
                date=date(2026, 9, 10),
                text="Devoir commun",
                html="<p>Devoir commun</p>",
            ),
        ),
    )

    lesson2 = Lesson(
        id="lesson2",
        start=datetime(2026, 9, 10, 10, 0),
        end=datetime(2026, 9, 10, 11, 0),
        subject="Physique",
        teachers=("M. Martin",),
        rooms=("205",),
        group=None,
        status=LessonStatus.NORMAL,
        content=None,
        homework_blocks=(
            HomeworkBlock(
                kind="due",
                date=date(2026, 9, 10),
                text="Devoir commun",
                html="<p>Devoir commun</p>",
            ),
        ),
    )

    homeworks = collect_homeworks([lesson1, lesson2], target_date=date(2026, 9, 10))
    assert len(homeworks) == 1
    assert homeworks[0].id == generate_homework_id(date(2026, 9, 10), "devoir commun")


def test_collect_homeworks_sorted() -> None:
    """Les résultats sont triés par (subject.lower(), text.lower()).

    :return: None
    """
    lesson1 = Lesson(
        id="lesson1",
        start=datetime(2026, 9, 10, 8, 0),
        end=datetime(2026, 9, 10, 9, 0),
        subject="Zoologie",
        teachers=("M. A",),
        rooms=("204",),
        group=None,
        status=LessonStatus.NORMAL,
        content=None,
        homework_blocks=(
            HomeworkBlock(
                kind="due", date=date(2026, 9, 10), text="Devoir B", html="<p>Devoir B</p>"
            ),
        ),
    )

    lesson2 = Lesson(
        id="lesson2",
        start=datetime(2026, 9, 10, 10, 0),
        end=datetime(2026, 9, 10, 11, 0),
        subject="Mathématiques",
        teachers=("M. B",),
        rooms=("205",),
        group=None,
        status=LessonStatus.NORMAL,
        content=None,
        homework_blocks=(
            HomeworkBlock(
                kind="due", date=date(2026, 9, 10), text="Devoir A", html="<p>Devoir A</p>"
            ),
        ),
    )

    homeworks = collect_homeworks([lesson1, lesson2], target_date=date(2026, 9, 10))
    assert len(homeworks) == 2
    assert homeworks[0].subject == "Mathématiques"
    assert homeworks[0].text == "Devoir A"
    assert homeworks[1].subject == "Zoologie"
    assert homeworks[1].text == "Devoir B"


def test_collect_homeworks_empty() -> None:
    """Aucun bloc de devoir → liste vide.

    :return: None
    """
    lesson = Lesson(
        id="lesson1",
        start=datetime(2026, 9, 10, 8, 0),
        end=datetime(2026, 9, 10, 9, 0),
        subject="Math",
        teachers=("M. Dupont",),
        rooms=("204",),
        group=None,
        status=LessonStatus.NORMAL,
        content=None,
    )

    homeworks = collect_homeworks([lesson], target_date=date(2026, 9, 10))
    assert homeworks == []


def test_normalize_homework_text() -> None:
    """Vérifie la normalisation des espaces, suppression HTML et minuscules.

    :return: None
    """
    text = "  <p>Exercice  1  à  5</p>  \n\n  page 42  "
    normalized = normalize_homework_text(text)
    assert normalized == "exercice 1 à 5 page 42"


def test_generate_homework_id_format() -> None:
    """Retourne un ID de 12 caractères hexadécimaux.

    :return: None
    """
    due_on = date(2026, 9, 10)
    text = "devoir test"
    homework_id = generate_homework_id(due_on, text)
    assert len(homework_id) == 12
    assert all(c in "0123456789abcdef" for c in homework_id)


def test_generate_homework_id_deterministic() -> None:
    """Mêmes entrées → même sortie.

    :return: None
    """
    due_on = date(2026, 9, 10)
    text = "devoir commun"
    id1 = generate_homework_id(due_on, text)
    id2 = generate_homework_id(due_on, text)
    assert id1 == id2


CANCELLED_STATUS_ICAL = """BEGIN:VCALENDAR
VERSION:2.0
X-WR-CALNAME:Test
BEGIN:VEVENT
UID:Test-123-20260906T120000Z-Index-Education
DTSTART:20260907T080000Z
DTEND:20260907T090000Z
SUMMARY:Test Course
STATUS:CANCELLED
DESCRIPTION:<div></div>
END:VEVENT
END:VCALENDAR"""


NORMAL_STATUS_ICAL = """BEGIN:VCALENDAR
VERSION:2.0
X-WR-CALNAME:Test
BEGIN:VEVENT
UID:Test-123-20260906T120000Z-Index-Education
DTSTART:20260907T080000Z
DTEND:20260907T090000Z
SUMMARY:Test Course
STATUS:CONFIRMED
DESCRIPTION:<div></div>
END:VEVENT
END:VCALENDAR"""


MOVED_BY_CATEGORY_ICAL = """BEGIN:VCALENDAR
VERSION:2.0
X-WR-CALNAME:Test
BEGIN:VEVENT
UID:Test-123-20260906T120000Z-Index-Education
DTSTART:20260907T080000Z
DTEND:20260907T090000Z
SUMMARY:Test Course
CATEGORIES:Cours - Cours déplacé
DESCRIPTION:<div></div>
END:VEVENT
END:VCALENDAR"""


MULTIPLE_BLOCKS_SAME_DATE_ICAL = """BEGIN:VCALENDAR
VERSION:2.0
X-WR-CALNAME:Test
BEGIN:VEVENT
UID:Test-123-20260906T120000Z-Index-Education
DTSTART:20260907T080000Z
DTEND:20260907T090000Z
SUMMARY:Test Course
CATEGORIES:Cours
DESCRIPTION:<div>
  Matière : Math
  Professeur : M. Dupont
  Salle : 204

  <strong>Pour le 10/09/2026 :</strong>
  Exercice 1 à 5 page 42.
  <strong>Pour le 10/09/2026 :</strong>
  Exercice 6 à 10 page 43.
</div>
END:VEVENT
END:VCALENDAR"""


def test_parse_ical_status_cancelled_only() -> None:
    """Un cours avec STATUS:CANCELLED mais sans CATEGORIES contenant 'Cours annulé' a status == LessonStatus.CANCELLED.

    :return: None
    """
    lessons, _, _ = parse_ical(CANCELLED_STATUS_ICAL)
    assert len(lessons) == 1
    assert lessons[0].status == LessonStatus.CANCELLED


def test_parse_ical_status_normal_without_cancel() -> None:
    """Un cours avec STATUS:CONFIRMED (ou sans STATUS) a status == LessonStatus.NORMAL.

    :return: None
    """
    lessons, _, _ = parse_ical(NORMAL_STATUS_ICAL)
    assert len(lessons) == 1
    assert lessons[0].status == LessonStatus.NORMAL


def test_parse_ical_moved_by_category_only() -> None:
    """Un cours avec CATEGORIES:Cours - Cours déplacé et sans STATUS a status == LessonStatus.MOVED.

    :return: None
    """
    lessons, _, _ = parse_ical(MOVED_BY_CATEGORY_ICAL)
    assert len(lessons) == 1
    assert lessons[0].status == LessonStatus.MOVED


def test_parse_body_multiple_blocks_same_date() -> None:
    """Un DESCRIPTION avec deux sections 'Pour le' à la même date conserve les deux blocs.

    :return: None
    """
    body_html = (
        "<div>\n"
        "  <strong>Pour le 10/09/2026:</strong>\n"
        "  Exercice 1 à 5 page 42.\n"
        "  <strong>Pour le 10/09/2026:</strong>\n"
        "  Exercice 6 à 10 page 43.\n"
        "</div>"
    )
    content, due_blocks, assigned_blocks = parse_body(body_html)
    assert len(due_blocks) == 2
    assert due_blocks[0][0] == date(2026, 9, 10)
    assert due_blocks[0][1] == "Exercice 1 à 5 page 42."
    assert due_blocks[1][0] == date(2026, 9, 10)
    assert due_blocks[1][1] == "Exercice 6 à 10 page 43."


def test_collect_homeworks_from_fixture() -> None:
    """Parse le fixture pronote-4e.ics, appelle collect_homeworks pour le 10/09/2026 et vérifie qu'au moins un devoir est retourné.

    :return: None
    """
    fixture_path = Path(__file__).parent.parent / "fixtures" / "pronote-4e.ics"
    with open(fixture_path, encoding="utf-8") as f:
        content = f.read()

    lessons, _, _ = parse_ical(content)
    homeworks = collect_homeworks(lessons, date(2026, 9, 10))

    assert len(homeworks) >= 1
    # Vérifie qu'au moins un devoir a le bon sujet et texte
    assert any(hw.subject == "Mathématiques" for hw in homeworks)
    assert any("Exercices 1 à 5 page 42" in hw.text for hw in homeworks)