# Copyright (c) 2026 Krzysztof Rudnicki. MIT licence.
"""Wiring, the background loops, and ASGI startup."""

from __future__ import annotations

import asyncio
from typing import TYPE_CHECKING

import httpx
import pytest
from fastapi.testclient import TestClient

from signal_bot import app as app_module
from signal_bot.app import Bot, Runtime, build_bot, create_runtime, lifespan, now_local
from signal_bot.transport_rest import TransportError
from tests.conftest import REPLY_GROUP, envelope

if TYPE_CHECKING:
    from signal_bot.config import Config
    from signal_bot.registry import Handler
    from signal_bot.store import Store
    from signal_bot.transport_fake import FakeTransport

BASE_ENV = {
    "PHONE_NUMBER": "+15550000000",
    "GROUP_ID": "watched==",
    "GROUP_ID_SEND": "reply==",
    "DATABASE_PATH": ":memory:",
}


# Captured before any monkeypatching, so a patched httpx.AsyncClient cannot
# recurse into this helper.
_REAL_ASYNC_CLIENT = httpx.AsyncClient


def _client(handler: Handler) -> httpx.AsyncClient:
    return _REAL_ASYNC_CLIENT(transport=httpx.MockTransport(handler))


def _bot(config: Config, store: Store, transport: FakeTransport) -> Bot:
    return build_bot(config, _client(lambda r: httpx.Response(200)), store, transport)


def test_now_local_is_timezone_aware() -> None:
    assert now_local().tzinfo is not None


def test_build_bot_registers_the_animal_commands(
    config: Config, store: Store, transport: FakeTransport
) -> None:
    bot = _bot(config, store, transport)
    assert bot.dispatcher.registry.resolve("!cat") is not None
    assert bot.dispatcher.registry.resolve("!pies") is not None


async def test_publish_report_posts_and_resets(
    config: Config, store: Store, transport: FakeTransport
) -> None:
    store.increment("u1", "Alice")
    await _bot(config, store, transport).publish_report()
    assert transport.texts == ["Alice  1"]
    assert transport.sent[0].recipient == REPLY_GROUP
    assert store.tallies() == []


async def test_publish_report_falls_back_to_uuid_when_unnamed(
    config: Config, store: Store, transport: FakeTransport
) -> None:
    store.increment("u1", "")
    await _bot(config, store, transport).publish_report()
    assert transport.texts == ["u1  1"]


async def test_listen_dispatches_every_frame(
    config: Config, store: Store, transport: FakeTransport
) -> None:
    transport.queue([envelope(text="hello", group_id=config.group_id)])
    await _bot(config, store, transport).listen()
    assert store.tallies()[0].count == 1


async def test_create_runtime_verifies_the_container_mode(config: Config) -> None:
    runtime = await create_runtime(
        config, _client(lambda r: httpx.Response(200, json={"mode": "json-rpc-native"}))
    )
    assert isinstance(runtime, Runtime)
    await runtime.stop()


async def test_create_runtime_refuses_a_polling_container(config: Config) -> None:
    with pytest.raises(TransportError):
        await create_runtime(
            config, _client(lambda r: httpx.Response(200, json={"mode": "normal"}))
        )


async def test_runtime_start_and_stop_cancels_tasks(
    config: Config, store: Store, transport: FakeTransport
) -> None:
    client = _client(lambda r: httpx.Response(200))
    runtime = Runtime(bot=_bot(config, store, transport), client=client, store=store)
    runtime.start()
    assert len(runtime.tasks) == 2
    await asyncio.sleep(0)
    await runtime.stop()
    assert all(task.done() for task in runtime.tasks)


def test_healthz_serves_and_startup_completes(monkeypatch: pytest.MonkeyPatch) -> None:
    """The old app never finished startup, so no route was ever reachable."""
    for key, value in BASE_ENV.items():
        monkeypatch.setenv(key, value)

    def fake_client(**kwargs: object) -> httpx.AsyncClient:
        return _client(lambda r: httpx.Response(200, json={"mode": "json-rpc-native"}))

    monkeypatch.setattr(app_module.httpx, "AsyncClient", fake_client)
    with TestClient(app_module.app) as client:
        assert client.get("/healthz").json() == {"status": "ok"}


async def test_lifespan_is_an_async_context_manager(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    for key, value in BASE_ENV.items():
        monkeypatch.setenv(key, value)
    monkeypatch.setattr(
        app_module.httpx,
        "AsyncClient",
        lambda **kwargs: _client(lambda r: httpx.Response(200, json={"mode": "json-rpc"})),
    )
    async with lifespan(app_module.app):
        assert app_module.app.state.runtime is not None