# Copyright (c) 2026 Krzysztof Rudnicki. MIT licence.
"""Coming back from an outage: the days and the periods the bot still owes."""

from __future__ import annotations

import datetime as dt
from typing import TYPE_CHECKING

import httpx

from signal_bot.bot import Bot, build_bot
from signal_bot.liveness import Liveness
from signal_bot.stats.nightly import LAST_REPORTED_KEY, mark_reported
from signal_bot.stats.periods import WARSAW
from tests.conftest import WATCHED_GROUP, mock_client
from tests.test_bot_report import TODAY, YESTERDAY, RefusingTransport, _bot, wrote

if TYPE_CHECKING:
    from signal_bot.config import Config
    from signal_bot.discovery import GroupDirectory
    from signal_bot.store import Store
    from signal_bot.transport_fake import FakeTransport


def _at(
    config: Config,
    store: Store,
    transport: FakeTransport,
    directory: GroupDirectory,
    day: str,
) -> Bot:
    """A bot whose clock reads 21:37 on ``day``, which is the day it reports."""
    at = dt.datetime.fromisoformat(day).replace(hour=21, minute=37, tzinfo=WARSAW)
    client = mock_client(lambda r: httpx.Response(200))
    return build_bot(
        config, client, store, transport, directory, Liveness(config, client), clock=lambda: at
    )


async def test_a_missed_day_is_posted_when_the_bot_returns(
    config: Config, store: Store, transport: FakeTransport, directory: GroupDirectory
) -> None:
    """An outage over 21:37 used to lose that day's report entirely."""
    wrote(store, WATCHED_GROUP, "u1", "Alice", 2, day="2026-08-30")
    wrote(store, WATCHED_GROUP, "u1", "Alice", 3, day="2026-08-31")
    wrote(store, WATCHED_GROUP, "u1", "Alice", 4, day=YESTERDAY)
    mark_reported(store, WATCHED_GROUP, "2026-08-29")

    await _bot(config, store, transport, directory).publish_report()

    # One message, five blocks. Catching up on the days also catches up the
    # periods that closed inside them -- the 30th was a Sunday and the 31st
    # ended August -- and posting each separately would turn one evening
    # into five notifications.
    assert len(transport.texts) == 1
    report = transport.texts[0]
    # Whole headers, not bare dates: a curiosity line inside one day's block
    # can name another day ("rekord życiowy (poprzedni 1, 31 sierpnia)"), so
    # a substring search finds the wrong occurrence and the order looks wrong.
    sunday = report.index("Niedziela, 30 sierpnia")
    week = report.index("tydzień 35")
    monday = report.index("Poniedziałek, 31 sierpnia")
    assert sunday < week < monday < report.index("sierpień 2026")
    assert "Wtorek, 1 września" in report
    assert store.meta(WATCHED_GROUP, LAST_REPORTED_KEY) == TODAY


async def test_a_day_nobody_spoke_is_settled_not_retried_forever(
    config: Config, store: Store, transport: FakeTransport, directory: GroupDirectory
) -> None:
    wrote(store, WATCHED_GROUP, "u1", "Alice", 1, day=YESTERDAY)
    mark_reported(store, WATCHED_GROUP, "2026-08-30")

    await _bot(config, store, transport, directory).publish_report()

    assert len(transport.texts) == 1
    assert store.meta(WATCHED_GROUP, LAST_REPORTED_KEY) == TODAY


async def test_a_failed_send_leaves_its_day_unmarked(
    config: Config, store: Store, directory: GroupDirectory
) -> None:
    """So the next run retries it instead of losing the day silently."""
    wrote(store, WATCHED_GROUP, "u1", "Alice", 1, day=YESTERDAY)
    mark_reported(store, WATCHED_GROUP, "2026-08-31")
    transport = RefusingTransport(refuses=WATCHED_GROUP)

    await _bot(config, store, transport, directory).publish_report()

    assert store.meta(WATCHED_GROUP, LAST_REPORTED_KEY) == "2026-08-31"


async def test_publishing_twice_posts_once(
    config: Config, store: Store, transport: FakeTransport, directory: GroupDirectory
) -> None:
    """The marker is what stops a restart re-posting the same day."""
    wrote(store, WATCHED_GROUP, "u1", "Alice", 3)
    bot = _bot(config, store, transport, directory)
    await bot.publish_report()
    await bot.publish_report()
    assert len(transport.texts) == 1


async def test_a_sunday_also_posts_the_week(
    config: Config, store: Store, transport: FakeTransport, directory: GroupDirectory
) -> None:
    """One scheduler, a date predicate -- not three tasks racing at 21:37.

    The week now closes on the Sunday evening it ends, off a day that is
    itself still running. That is the point of the predicate taking a day
    instead of reading a clock: partial or not, Sunday is the last day of
    the week and the summary belongs to it.
    """
    sunday = "2026-08-30"
    wrote(store, WATCHED_GROUP, "u1", "Alice", 4, day="2026-08-28")
    wrote(store, WATCHED_GROUP, "u1", "Alice", 6, day=sunday)
    mark_reported(store, WATCHED_GROUP, "2026-08-29")

    await _at(config, store, transport, directory, sunday).publish_report()

    assert len(transport.texts) == 1
    assert "Niedziela, 30 sierpnia" in transport.texts[0]
    assert "tydzień 35" in transport.texts[0]


async def test_a_saturday_closes_nothing(
    config: Config, store: Store, transport: FakeTransport, directory: GroupDirectory
) -> None:
    """The day before the week ends is still just a day."""
    saturday = "2026-08-29"
    wrote(store, WATCHED_GROUP, "u1", "Alice", 4, day=saturday)
    mark_reported(store, WATCHED_GROUP, "2026-08-28")

    await _at(config, store, transport, directory, saturday).publish_report()

    assert len(transport.texts) == 1
    assert "Sobota, 29 sierpnia" in transport.texts[0]


async def test_an_ordinary_day_posts_only_the_day(
    config: Config, store: Store, transport: FakeTransport, directory: GroupDirectory
) -> None:
    wrote(store, WATCHED_GROUP, "u1", "Alice", 4)
    await _bot(config, store, transport, directory).publish_report()
    assert len(transport.texts) == 1


async def test_a_refused_report_marks_nothing_at_all(
    config: Config, store: Store, directory: GroupDirectory
) -> None:
    """One message means one outcome: the group got all of it, or none.

    The day used to be marked before its weekly summary was even attempted,
    so a summary that failed was simply lost. With both inside one send there
    is no half-state to reason about -- the next run says the whole thing.
    """
    sunday = "2026-08-30"
    wrote(store, WATCHED_GROUP, "u1", "Alice", 6, day=sunday)
    mark_reported(store, WATCHED_GROUP, "2026-08-29")
    transport = RefusingTransport(refuses=WATCHED_GROUP)

    await _at(config, store, transport, directory, sunday).publish_report()

    assert transport.texts == []
    assert store.meta(WATCHED_GROUP, LAST_REPORTED_KEY) == "2026-08-29"