"""Entry point: settings → texts → dispatcher → long polling (ADR-002)."""

import asyncio
import contextlib
import logging

from aiogram import Bot, Dispatcher
from aiogram.client.session.aiohttp import AiohttpSession

from app import __version__
from app.access.service import AccessService
from app.bot.fsm import make_storage
from app.bot.middlewares.access import AccessMiddleware
from app.bot.routers import commit, common, members, status
from app.config import Settings
from app.db.maintenance import cleanup_loop
from app.db.migrate import upgrade
from app.db.session import SessionMaker, make_engine, make_sessionmaker
from app.health import heartbeat
from app.logs_setup import setup_logging
from app.repo.drafts import DraftService
from app.repo.git import UploadsRepo
from app.repo.publisher import Publisher
from app.runtime.checks import Checker, load_checks
from app.runtime.docker import DockerClient
from app.runtime.snapshots import SnapshotStore, snapshot_loop
from app.texts import Texts, load_texts

log = logging.getLogger("tgit")


def build_dispatcher(
    texts: Texts,
    sessions: SessionMaker,
    access: AccessService,
    repo: UploadsRepo,
    commit_url_template: str = "",
    docker: DockerClient | None = None,
    checker: Checker | None = None,
) -> Dispatcher:
    dp = Dispatcher(storage=make_storage(sessions))
    gate = AccessMiddleware(access, texts)
    # Outer middleware: runs before filters, so nothing — not even a stale button — reaches a handler unchecked.
    dp.message.outer_middleware(gate)
    dp.callback_query.outer_middleware(gate)
    dp.include_router(members.build_router(texts, access))
    dp.include_router(
        commit.build_router(texts, repo, DraftService(sessions), Publisher(repo, sessions), commit_url_template)
    )
    dp.include_router(status.build_router(texts, docker, checker))
    dp.include_router(common.build_router(texts, access))
    return dp


async def run(settings: Settings) -> None:
    texts = load_texts(settings.runtime.config_dir)
    checks_cfg = load_checks(settings.runtime.config_dir)
    engine = make_engine(settings.database.url)
    await upgrade(engine)
    sessions = make_sessionmaker(engine)
    access = AccessService(sessions, settings.access)
    await access.bootstrap_admins()
    # No DOCKER_URL (e.g. `make run` without Docker): «Статус» answers «Docker недоступен», the rest works
    docker = DockerClient(settings.docker) if settings.docker.url else None
    store = SnapshotStore(sessions)
    checker = Checker(docker, store, checks_cfg) if docker else None
    dp = build_dispatcher(
        texts, sessions, access, UploadsRepo(settings.git), settings.git.commit_url_template, docker, checker
    )
    rt = settings.runtime
    background = [
        asyncio.create_task(heartbeat(rt.heartbeat_file, rt.heartbeat_interval)),
        asyncio.create_task(cleanup_loop(sessions)),
    ]
    if docker:
        background.append(asyncio.create_task(snapshot_loop(docker, store, settings.docker.snapshot_interval)))
    proxy = settings.telegram.proxy_url
    session = AiohttpSession(proxy=proxy.get_secret_value()) if proxy else None
    bot = Bot(settings.telegram.bot_token.get_secret_value(), session=session)
    log.info(
        "tgit %s starting, %d bootstrap admin(s), telegram %s, docker %s",
        __version__,
        len(settings.access.admin_ids),
        "via proxy" if proxy else "direct",
        "on" if docker else "off",
    )
    try:
        await dp.start_polling(bot, handle_signals=True)
    finally:
        for task in background:
            task.cancel()
        for task in background:
            with contextlib.suppress(asyncio.CancelledError):
                await task
        await bot.session.close()
        if docker:
            await docker.aclose()
        if checker:
            await checker.aclose()
        await engine.dispose()
        log.info("tgit stopped")


def main() -> None:
    settings = Settings()
    setup_logging(settings.runtime.log_level)
    asyncio.run(run(settings))