"""Feuilles de poste (PDF) — API."""

import base64
import datetime as dt

from app.models import Assignment, Role
from tests.factories import dt_at, make_artist, make_position, make_shift, make_volunteer

# PNG 1×1 valide (transparent), le plus petit possible.
_PNG = base64.b64decode(
    "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNk+A8AAQUBAScY"
    "42YAAAAASUVORK5CYII="
)


def _url(edition):
    return f"/editions/{edition.id}/position-sheets/generate"


def test_is_coordinator_only(edition, make_account, as_account):
    lead = make_account(Role.LEAD, email="lead@e.fr")
    client = as_account(lead)
    resp = client.post(_url(edition), json={})
    assert resp.status_code == 403


def test_rejects_when_no_position_matches(client, edition):
    resp = client.post(
        _url(edition),
        json={"position_ids": ["00000000-0000-0000-0000-000000000000"]},
    )
    assert resp.status_code == 422
    assert resp.json()["detail"]["code"] == "position_sheets.no_positions"


def test_rejects_when_no_real_need_to_print(client, edition, session):
    # Créneaux générés à 0/0, jamais remplis : rien à imprimer.
    make_position(session, edition, name="Bar central")
    resp = client.post(_url(edition), json={})
    assert resp.status_code == 422
    assert resp.json()["detail"]["code"] == "position_sheets.no_shifts"


def test_generates_a_pdf_with_assigned_volunteers(client, edition, session):
    position = make_position(session, edition, name="Bar central")
    shift = make_shift(
        session, edition, position, start=dt_at(9, 19), end=dt_at(9, 22),
        min_staff=1, ideal_staff=2,
    )
    volunteer = make_volunteer(session, edition, first_name="Alex", last_name="Martin")
    session.add(
        Assignment(edition_id=edition.id, volunteer_id=volunteer.id, shift_id=shift.id)
    )
    session.commit()

    resp = client.post(_url(edition), json={})
    assert resp.status_code == 200
    assert resp.headers["content-type"] == "application/pdf"
    assert resp.content.startswith(b"%PDF")


def test_generates_a_pdf_with_a_referent(client, edition, session, make_account):
    position = make_position(session, edition, name="Bar central")
    make_shift(
        session, edition, position, start=dt_at(9, 19), end=dt_at(9, 22),
        min_staff=1, ideal_staff=2,
    )
    referent_volunteer = make_volunteer(session, edition, first_name="Sam", last_name="Nuit")
    referent_account = make_account(
        Role.LEAD, volunteer_id=referent_volunteer.id, email="referent@e.fr"
    )
    client.patch(
        f"/editions/{edition.id}/positions/{position.id}",
        json={"lead_account_id": str(referent_account.id)},
    )

    resp = client.post(_url(edition), json={})
    assert resp.status_code == 200
    assert resp.content.startswith(b"%PDF")


def test_includes_a_volunteer_photo_when_present(client, edition, session):
    position = make_position(session, edition, name="Bar central")
    shift = make_shift(
        session, edition, position, start=dt_at(9, 19), end=dt_at(9, 22),
        min_staff=1, ideal_staff=2,
    )
    with_photo = make_volunteer(session, edition, first_name="Alex", last_name="Martin")
    with_photo.photo = _PNG
    with_photo.photo_content_type = "image/png"
    without_photo = make_volunteer(session, edition, first_name="Sam", last_name="Nuit")
    session.add_all(
        [
            Assignment(edition_id=edition.id, volunteer_id=with_photo.id, shift_id=shift.id),
            Assignment(edition_id=edition.id, volunteer_id=without_photo.id, shift_id=shift.id),
        ]
    )
    session.commit()

    resp = client.post(_url(edition), json={})
    assert resp.status_code == 200
    assert resp.content.startswith(b"%PDF")


def test_includes_the_day_lineup_across_all_positions(client, edition, session):
    bar = make_position(session, edition, name="Bar central")
    welcome = make_position(session, edition, name="Accueil")
    make_shift(
        session, edition, bar, start=dt_at(9, 19), end=dt_at(9, 22),
        min_staff=1, ideal_staff=2,
    )
    make_shift(
        session, edition, welcome, start=dt_at(9, 9), end=dt_at(9, 13),
        min_staff=1, ideal_staff=2,
    )
    # Passage le 9 (jour des deux créneaux) : doit apparaître sur les deux
    # feuilles, pas seulement celle du poste « Régie ».
    make_artist(
        session, edition, name="Chilla",
        performance_date=dt.date(2026, 7, 9),
        start_time=dt.time(20, 0), end_time=dt.time(21, 0),
    )
    # Passage un autre jour : ne doit apparaître sur aucune des deux.
    make_artist(
        session, edition, name="Hors sujet",
        performance_date=dt.date(2026, 7, 11),
        start_time=dt.time(20, 0), end_time=dt.time(21, 0),
    )

    resp = client.post(_url(edition), json={})
    assert resp.status_code == 200
    assert resp.content.startswith(b"%PDF")


def test_position_ids_filter_scopes_the_sheets(client, edition, session):
    bar = make_position(session, edition, name="Bar central")
    welcome = make_position(session, edition, name="Accueil")
    make_shift(
        session, edition, bar, start=dt_at(9, 19), end=dt_at(9, 22),
        min_staff=1, ideal_staff=2,
    )
    make_shift(
        session, edition, welcome, start=dt_at(9, 9), end=dt_at(9, 13),
        min_staff=1, ideal_staff=2,
    )

    resp = client.post(_url(edition), json={"position_ids": [str(bar.id)]})
    assert resp.status_code == 200

    resp = client.post(_url(edition), json={"position_ids": [str(welcome.id)]})
    assert resp.status_code == 200


def test_a_night_that_passes_midnight_stays_on_its_festival_day(client, edition, session):
    # Début de journée = 06:00 (premier créneau type de la fixture) : 00h–02h
    # le 10 appartient encore à la soirée du 9 — une seule page, pas deux.
    from io import BytesIO

    from pypdf import PdfReader

    position = make_position(session, edition, name="Bar de nuit")
    for start, end in [
        (dt_at(9, 22), dt_at(9, 23)),
        (dt_at(9, 23), dt_at(10, 0)),
        (dt_at(10, 0), dt_at(10, 1)),
        (dt_at(10, 1), dt_at(10, 2)),
    ]:
        make_shift(session, edition, position, start=start, end=end)

    resp = client.post(_url(edition), json={})
    assert resp.status_code == 200
    reader = PdfReader(BytesIO(resp.content))
    assert len(reader.pages) == 1
    text = reader.pages[0].extract_text()
    assert "jeudi 9 juillet" in text.lower()
    assert "01:00" in text