# Copyright (c) 2026 Krzysztof Rudnicki. MIT licence.
"""What the bot says about a "!" word it does not know, and what it keeps."""

from __future__ import annotations

from typing import TYPE_CHECKING

import pytest

from signal_bot.models import parse_envelope
from signal_bot.registry import CommandRegistry
from signal_bot.unknown import (
    SUGGEST_PRIMARY,
    answer_unknown,
    reply_for,
    unknown_in,
)
from tests.conftest import SECOND_GROUP, WATCHED_GROUP, envelope

if TYPE_CHECKING:
    from signal_bot.context import CommandContext
    from signal_bot.store import Store
    from signal_bot.transport_fake import FakeTransport


async def _noop(ctx: CommandContext) -> None:
    """A handler that does nothing."""


def loaded() -> CommandRegistry:
    """A registry with one global command and one scoped to a single group."""
    registry = CommandRegistry()
    registry.register("cat", ["!kot", "!cat"], _noop, "kot")
    # The album's shape: scoped, and named after a person.
    registry.register("pack:p1", ["!alfa"], _noop, "zdjęcia", groups=frozenset({WATCHED_GROUP}))
    return registry


@pytest.mark.parametrize("text", [None, "", "   ", "just chatting", "hej! super"])
def test_a_message_that_is_not_a_command_attempt_is_not_one(text: str | None) -> None:
    """Nothing without a leading "!" word reaches the rest of this module."""
    assert unknown_in(text, loaded()) is None


@pytest.mark.parametrize("text", ["!", "!!", "!?", "!...", "!😀", "!x"])
def test_punctuation_shaped_like_a_command_is_ignored(text: str) -> None:
    """No reply and no row: this is ordinary typing, not a mistyped command."""
    assert unknown_in(text, loaded()) is None


def test_a_real_trigger_with_words_after_it_stays_silent() -> None:
    """ "!kot ładny" has always been silent and this feature does not change it."""
    assert unknown_in("!kot ładny", loaded()) is None


def test_a_command_scoped_to_another_group_is_never_reported() -> None:
    """The album's privacy guarantee.

    "!alfa" is a person's name. In a group with no album it is unclaimed
    *there*, so a check scoped to the asking group would answer it and store
    it -- announcing the album and putting the name in the database. The
    check is global, so this is silence.
    """
    assert unknown_in("!alfa", loaded()) is None


def test_an_unclaimed_word_is_reported_with_the_whole_message() -> None:
    """The word is folded; the body is kept exactly as it was typed."""
    found = unknown_in("!CTA teraz proszę", loaded())
    assert found is not None
    assert found.word == "!cta"
    assert found.body == "!CTA teraz proszę"


def test_a_styled_or_cyrillic_spelling_folds_before_anything_else() -> None:
    """The same folding the registry does, so both sides can only agree."""
    found = unknown_in("!ᴄᴛᴀ", loaded())
    assert found is not None
    assert found.word == "!cta"


def test_a_digit_survives_folding_and_is_still_recorded() -> None:
    """fold() maps 0134578 onto letters but leaves 2, 6 and 9 alone.

    A letters-only shape guard would silently drop "!rok2", which is exactly
    the kind of request this feature exists to collect.
    """
    found = unknown_in("!rok2", loaded())
    assert found is not None
    assert found.word == "!rok2"


def test_a_near_miss_is_answered_with_the_polish_spelling() -> None:
    """`triggers` are folded skeletons; only `primary` still reads correctly."""
    registry = CommandRegistry()
    registry.register("pope", ["!papież", "!pope"], _noop, "papież")
    live = registry.triggers_in(WATCHED_GROUP)
    assert "!papież" in reply_for("!papiesz", live)
    assert "!papiez?" not in reply_for("!papiesz", live)


def test_a_word_with_no_near_miss_points_at_the_suggestion_command() -> None:
    """Otherwise there is nothing for the person to do with the refusal."""
    text = reply_for("!nosuchcommand", loaded().triggers_in(WATCHED_GROUP))
    assert SUGGEST_PRIMARY in text
    assert "!nosuchcommand" in text


def test_a_suggestion_never_names_a_command_from_another_group() -> None:
    """ "!alfaa" must not come back as "chodziło o !alfa?" where there is no album.

    Asserted on the correction clause rather than on the bare name, because
    the refusal quotes the word that was typed and "!alfa" is a substring of
    "!alfaa" -- a naive check passes for the wrong reason.
    """
    registry = loaded()
    live = registry.triggers_in(SECOND_GROUP)
    assert "!alfa" not in live
    answer = reply_for("!alfaa", live)
    assert "Chodziło" not in answer
    assert SUGGEST_PRIMARY in answer
    # ...and the album's own group is where the correction is allowed.
    assert "Chodziło" in reply_for("!alfaa", registry.triggers_in(WATCHED_GROUP))


async def test_answering_records_the_token_and_the_body(
    store: Store, transport: FakeTransport
) -> None:
    """One row, one reply, keyed on the envelope's own timestamp."""
    message = parse_envelope(envelope(text="!cta", timestamp=4242))
    assert message is not None
    await answer_unknown(
        message=message,
        group_id=WATCHED_GROUP,
        registry=loaded(),
        store=store,
        transport=transport,
    )
    assert len(transport.sent) == 1
    assert "!kot" in (transport.sent[0].text or "")
    (row,) = store.suggestions.unknown()
    assert row.word == "!cta"
    assert row.bodies == ("!cta",)
    assert row.last_seen == 4242


async def test_answering_quotes_the_person_who_asked(
    store: Store, transport: FakeTransport
) -> None:
    """A busy group has to be able to tell which "!cta" this is about."""
    message = parse_envelope(envelope(text="!cta"))
    assert message is not None
    await answer_unknown(
        message=message,
        group_id=WATCHED_GROUP,
        registry=loaded(),
        store=store,
        transport=transport,
    )
    assert transport.sent[0].quote is not None


async def test_a_message_that_is_not_an_attempt_writes_nothing(
    store: Store, transport: FakeTransport
) -> None:
    """The early return, from the caller's side."""
    message = parse_envelope(envelope(text="just chatting"))
    assert message is not None
    await answer_unknown(
        message=message,
        group_id=WATCHED_GROUP,
        registry=loaded(),
        store=store,
        transport=transport,
    )
    assert transport.sent == []
    assert store.suggestions.unknown() == []