# Copyright (c) 2026 Krzysztof Rudnicki. MIT licence.
"""Upgrade announcements: told once, never on the way in, never in a loop."""

from __future__ import annotations

from typing import TYPE_CHECKING

from signal_bot.announce import ANNOUNCED_KEY, announce_all, announce_to, render
from signal_bot.changelog import parse
from signal_bot.transport_fake import FakeTransport

if TYPE_CHECKING:
    from signal_bot.store import Store

GROUP = "group.one"
DOCUMENT = """\
## 0.0.1 — Linus

- druga zmiana

## 0.0.0 — Święty Piotr Apostoł

- pierwsza zmiana
"""
RELEASES = parse(DOCUMENT)


async def _announce(store: Store, transport: FakeTransport, version: str = "0.0.1") -> None:
    await announce_to(transport, store, GROUP, RELEASES, version, "Linus")


def test_a_single_release_is_rendered_flat() -> None:
    """The header already names it; a per-release block would just repeat it."""
    message = render("0.0.1", "Linus", RELEASES[1:])
    assert message == "Wersja 0.0.1 «Linus» wydana\nChangelog:\n- druga zmiana"


def test_a_long_backlog_is_capped_and_says_so() -> None:
    """A group added years from now must not be handed 200 releases."""
    document = "\n\n".join(
        f"## {v} — Pope{i}\n\n- zmiana {i}"
        for i, v in enumerate(
            [
                "0.0.0",
                "0.0.1",
                "0.0.2",
                "0.0.3",
                "0.0.4",
                "0.0.5",
                "0.0.6",
                "0.0.7",
                "0.1.0",
                "0.1.1",
                "0.1.2",
                "0.1.3",
            ]
        )
    )
    message = render("0.1.3", "Soter", parse(document))
    assert "(pominieto 2 starszych wersji)" in message
    assert "zmiana 0" not in message
    assert "zmiana 11" in message


def test_render_names_the_version_and_lists_every_pending_line() -> None:
    message = render("0.0.1", "Linus", RELEASES)
    assert message.startswith("Wersja 0.0.1 «Linus» wydana\nChangelog:")
    assert "- pierwsza zmiana" in message
    assert "- druga zmiana" in message


async def test_a_group_told_nothing_yet_hears_the_ladder_from_peter(
    store: Store, transport: FakeTransport
) -> None:
    """kuhy asked for this explicitly: the joke only lands if Peter is posted."""
    await _announce(store, transport)
    assert len(transport.sent) == 1
    message = transport.sent[0].text or ""
    assert "0.0.0 «Święty Piotr Apostoł»" in message
    assert "pierwsza zmiana" in message
    assert "druga zmiana" in message
    assert store.meta(GROUP, ANNOUNCED_KEY) == "0.0.1"


async def test_a_group_already_on_this_version_hears_nothing(
    store: Store, transport: FakeTransport
) -> None:
    store.set_meta(GROUP, ANNOUNCED_KEY, "0.0.1")
    await _announce(store, transport)
    assert transport.sent == []


async def test_an_upgraded_group_is_told_what_changed(
    store: Store, transport: FakeTransport
) -> None:
    store.set_meta(GROUP, ANNOUNCED_KEY, "0.0.0")
    await _announce(store, transport)
    assert len(transport.sent) == 1
    assert "Wersja 0.0.1 «Linus» wydana" in (transport.sent[0].text or "")
    assert "druga zmiana" in (transport.sent[0].text or "")
    assert "pierwsza zmiana" not in (transport.sent[0].text or "")
    assert store.meta(GROUP, ANNOUNCED_KEY) == "0.0.1"


async def test_a_version_with_no_changelog_entry_records_but_says_nothing(
    store: Store, transport: FakeTransport
) -> None:
    """An empty announcement is worse than none."""
    store.set_meta(GROUP, ANNOUNCED_KEY, "0.0.1")
    await _announce(store, transport, version="0.0.2")
    assert transport.sent == []
    assert store.meta(GROUP, ANNOUNCED_KEY) == "0.0.2"


async def test_the_version_is_recorded_before_the_send(store: Store) -> None:
    """A crash between the two must not re-announce on every restart."""

    class Exploding(FakeTransport):
        async def send_text(self, text: str, recipient: str) -> None:
            raise RuntimeError(text, recipient)

    store.set_meta(GROUP, ANNOUNCED_KEY, "0.0.0")
    await announce_all(Exploding(), store, [GROUP], RELEASES, "0.0.1", "Linus")
    assert store.meta(GROUP, ANNOUNCED_KEY) == "0.0.1"


async def test_one_failing_group_does_not_silence_the_others(store: Store) -> None:
    other = "group.two"

    class RefusingFirst(FakeTransport):
        async def send_text(self, text: str, recipient: str) -> None:
            if recipient == GROUP:
                raise RuntimeError(recipient)
            await super().send_text(text, recipient)

    for group in (GROUP, other):
        store.set_meta(group, ANNOUNCED_KEY, "0.0.0")
    transport = RefusingFirst()
    await announce_all(transport, store, [GROUP, other], RELEASES, "0.0.1", "Linus")
    assert [message.recipient for message in transport.sent] == [other]