"""SubscribeStarClient.iter_memberships — parsing only, no network (#387 D1).

The fixture mirrors a REAL capture of the operator's /subscriptions page
(Scribe note #3989) with every value invented. Its structure was checked
against the capture tag for tag before this file was written: the card
wrappers, both table heads, and every distinct row shape — including the two
forms the Discord cell takes, and the narrow-screen `<tr class="for-actions">`
that active rows nest INSIDE their own row.

Most of what follows pins refusals. SubscribeStar gives no completeness signal
the way Patreon's `meta.pagination.total` does, and every conclusion drawn from
this roster is drawn from absence, so the parser's job is to raise whenever it
cannot vouch for the whole list.

`_get` is stubbed rather than mocked at the socket: these tests are about what
the client does with a page, and the HTTP path is covered by
test_subscribestar_client.py.
"""

from pathlib import Path
from types import SimpleNamespace

import pytest

from backend.app.services.membership_roster import has_paid_access, roster_user_id
from backend.app.services.native_ingest_common import Membership
from backend.app.services.subscribestar_client import (
    SubscribeStarAuthError,
    SubscribeStarClient,
    SubscribeStarDriftError,
    parse_subscriptions_page,
)

_FIXTURE = Path(__file__).parent / "fixtures" / "subscribestar_subscriptions_page1.html"


@pytest.fixture
def page():
    return _FIXTURE.read_text()


@pytest.fixture
def client():
    return SubscribeStarClient(cookies_path=None)


def _serve(client, html):
    calls = []

    def fake(url, *, headers=None):
        calls.append(url)
        return SimpleNamespace(text=html)

    client._get = fake
    return calls


def _by_id(memberships):
    return {m.campaign_id: m for m in memberships}


# --- the request -----------------------------------------------------------


def test_the_roster_is_fetched_from_adult_not_art(client, page):
    """The capture came from `.art`, but FC's requests never clear the `.art`
    age wall with the 18+ cookie (#1259, #1284). Copying the browser's host is
    the obvious move and would turn every sweep into an auth error."""
    calls = _serve(client, page)
    list(client.iter_memberships())
    assert calls == ["https://subscribestar.adult/subscriptions"]


def test_one_request_for_the_whole_roster(client, page):
    calls = _serve(client, page)
    list(client.iter_memberships(user_id="ignored"))
    assert len(calls) == 1


# --- what a membership contains --------------------------------------------


def test_both_tables_are_read(page):
    rows = parse_subscriptions_page(page)
    assert all(isinstance(m, Membership) for m in rows)
    assert len(rows) == 4
    statuses = sorted(m.status for m in rows)
    assert statuses == [
        "active_subscriptions", "active_subscriptions",
        "cancelled_subscriptions", "cancelled_subscriptions",
    ]


def test_the_creator_id_is_the_key_not_the_slug(page):
    """A slug re-keys when a creator renames; the old row then stops appearing,
    and reconciliation reads a disappearance as a lapse. The numeric id does not
    change, so a rename can never surface as "you cancelled this creator"
    (note #3989, CORRECTION 2)."""
    rows = _by_id(parse_subscriptions_page(page))
    assert set(rows) == {"1001", "2002002", "3003003", "4004"}
    alpha = rows["1001"]
    assert alpha.vanity == "creator-alpha"
    # The handle is carried as a URL so `match_kind`'s URL-tail fallback reaches
    # it — which is what a SubscribeStar Source.url ends in.
    assert alpha.url == "https://subscribestar.adult/creator-alpha"
    assert alpha.display_name == "Creator Alpha"


def test_the_table_is_the_status(page):
    """No per-row status word exists. The card's `data-identifier` is stored
    verbatim — and is exactly what MEMBERSHIP_STATUS maps, so a renamed
    identifier fails here rather than silently reading as unknown."""
    rows = _by_id(parse_subscriptions_page(page))
    assert rows["1001"].status == "active_subscriptions"
    assert rows["3003003"].status == "cancelled_subscriptions"
    assert has_paid_access("subscribestar", rows["1001"].status) is True
    assert has_paid_access("subscribestar", rows["3003003"].status) is False


def test_price_is_kept_as_text_and_never_parsed_into_money(page):
    """A bare `$` names no currency and a page price is not proven to be the
    charge. None keeps "unknown" distinct from zero (#3970 finding 4)."""
    rows = _by_id(parse_subscriptions_page(page))
    alpha = rows["1001"]
    assert alpha.amount_cents is None
    assert alpha.currency is None
    assert alpha.details["columns"]["price"] == "$5"
    assert alpha.tier_names == []
    assert alpha.is_free_member is False


def test_columns_are_paired_by_position_not_by_class(page):
    """Two active columns share the `for-date` class, and the updates column's
    <td> does not carry its <th>'s class — pairing by class would merge or drop
    them. Controls and identity stay out of details."""
    cols = _by_id(parse_subscriptions_page(page))["1001"].details["columns"]
    assert cols == {
        "subscribed": "Jan 2026",
        "renewed": "Mar 2026",
        "paused": "-",
        "price": "$5",
        "discord": "Joined",
    }
    cancelled = _by_id(parse_subscriptions_page(page))["3003003"].details["columns"]
    assert cancelled == {"unsubscribed": "Dec 2025", "price": "$3"}


def test_both_discord_cell_forms_read_as_text(page):
    """The real page renders a linked Discord as a button with an icon, and an
    unlinked one as the ENTITY `&mdash;`. Undecoded, the second would store the
    literal string "&mdash;"."""
    rows = _by_id(parse_subscriptions_page(page))
    assert rows["1001"].details["columns"]["discord"] == "Joined"
    assert rows["2002002"].details["columns"]["discord"] == "—"


def test_the_nested_actions_row_is_not_read_as_columns(page):
    """Active rows nest a narrow-screen `<tr class="for-actions">` inside their
    own row. Its cells would otherwise zip onto the header as extra columns."""
    cols = _by_id(parse_subscriptions_page(page))["2002002"].details["columns"]
    assert "Manage options" not in cols.values()
    assert set(cols) == {"subscribed", "renewed", "paused", "price", "discord"}


# --- refusals --------------------------------------------------------------


def test_a_creator_in_both_tables_is_reported_once_as_active(page):
    """A current subscription is the fact that matters. Written the other way
    round, the cancelled row would overwrite the active one in the upsert and
    tell a paying subscriber they had lapsed."""
    duplicated = page.replace('data-user-id="3003003"', 'data-user-id="1001"')
    rows = parse_subscriptions_page(duplicated)
    matches = [m for m in rows if m.campaign_id == "1001"]
    assert len(matches) == 1
    assert matches[0].status == "active_subscriptions"


def test_an_account_that_never_cancelled_has_no_cancelled_card(page):
    """Not drift — such an account plausibly renders no cancelled table."""
    start = page.index('<div class="card for-table" data-identifier="cancelled_subscriptions"')
    end = page.index("</table></div>", start) + len("</table></div>")
    rows = parse_subscriptions_page(page[:start] + page[end:])
    assert {m.status for m in rows} == {"active_subscriptions"}


def test_a_login_wall_is_auth_not_drift():
    """The fix for this is a fresh credential, not a scraper change — and the
    distinction survives into membership_sync.last_error_type, where it is what
    makes the UI's advice correct."""
    wall = '<html><body><form action="/session/new" data-role="sign_in"></form></body></html>'
    with pytest.raises(SubscribeStarAuthError):
        parse_subscriptions_page(wall)


def test_an_unrecognised_page_is_drift():
    with pytest.raises(SubscribeStarDriftError):
        parse_subscriptions_page("<html><title>Something else</title><body></body></html>")


def test_a_row_without_a_creator_id_refuses_the_whole_roster(page):
    """Identity is the point (#3970 §4). Skipping the row instead would return a
    roster one creator short, which downstream reads as a cancellation."""
    with pytest.raises(SubscribeStarDriftError, match="data-user-id"):
        parse_subscriptions_page(page.replace(' data-user-id="2002002"', ""))


def test_a_non_numeric_creator_id_is_drift(page):
    with pytest.raises(SubscribeStarDriftError, match="data-user-id"):
        parse_subscriptions_page(page.replace('data-user-id="2002002"', 'data-user-id="beta"'))


def test_a_row_without_a_creator_link_is_drift(page):
    with pytest.raises(SubscribeStarDriftError, match="creator link"):
        parse_subscriptions_page(page.replace('<a href="/creator-gamma">', "<a>"))


@pytest.mark.parametrize("card", ["active_subscriptions", "cancelled_subscriptions"])
def test_content_after_a_table_is_treated_as_possible_pagination(page, card):
    """Both cards are paginatable (`app#embed_pagination`), and the capture was
    too short to show what pagination looks like. Anything rendered after a
    table is therefore a roster FC cannot prove complete — raised, never
    returned short."""
    start = page.index(f'data-identifier="{card}"')
    close = page.index("</table>", start) + len("</table>")
    paginated = page[:close] + '<nav class="pagination"><a>2</a></nav>' + page[close:]
    with pytest.raises(SubscribeStarDriftError, match="cannot be proven complete"):
        parse_subscriptions_page(paginated)


def test_a_page_link_anywhere_in_the_roster_is_drift(page):
    """The same concern for a paginator rendered outside the card."""
    paged = page.replace("</body>", '<a href="/subscriptions?page=2">Next</a></body>')
    with pytest.raises(SubscribeStarDriftError, match="page="):
        parse_subscriptions_page(paged)


def test_a_drift_error_mid_page_yields_nothing(client, page):
    """The whole page is parsed before anything is yielded, so a caller can never
    be left holding the rows that came before the bad one."""
    _serve(client, page.replace(' data-user-id="4004"', ""))
    got = []
    with pytest.raises(SubscribeStarDriftError):
        for m in client.iter_memberships():
            got.append(m)
    assert got == []


# --- the sweep's user-id probe ---------------------------------------------


def test_a_client_without_current_user_id_needs_no_id():
    """The seam leak D1 found: the sweep called `current_user_id()` on every
    client, which exists only on Patreon's. Note #3970 promised a second platform
    would be one `builders` line and the client method; without this probe it
    would have raised AttributeError on the first sweep."""
    assert roster_user_id(SubscribeStarClient(cookies_path=None)) is None


def test_a_client_with_current_user_id_is_asked_for_it():
    assert roster_user_id(SimpleNamespace(current_user_id=lambda: "248453")) == "248453"