"""Application entrypoint: FastAPI API + scheduler + Telegram bot (frozen wiring, #34)."""

import logging
from collections.abc import AsyncGenerator
from contextlib import asynccontextmanager

from fastapi import FastAPI
from sqlalchemy.exc import SQLAlchemyError

from app.api.routes import router
from app.channels import telegram
from app.config import get_settings
from app.db.bootstrap import init_db
from app.db.session import dispose
from app.scheduler import jobs as scheduler

# Logs carry only tokens, states and event codes — never PII or raw message text.
logging.basicConfig(level=logging.INFO, format="%(asctime)s %(levelname)s %(name)s %(message)s")
log = logging.getLogger("app")


@asynccontextmanager
async def lifespan(_: FastAPI) -> AsyncGenerator[None, None]:
    settings = get_settings()
    log.info("startup llm_provider=%s demo_clock=%s", settings.llm_provider, settings.demo_clock)
    try:
        await init_db()
        log.info("db schema ready")
    except (OSError, SQLAlchemyError) as exc:
        # In compose Postgres is required and healthy before the app starts; this branch is for running the
        # API (and its tests) without a database. Endpoints touching the DB will fail until it is reachable.
        log.error("db init failed, continuing without db: %s", type(exc).__name__)
        if settings.max_enabled:
            raise  # MAX requires persistent bindings and a delivery queue.
    # Lanes fill these in (#13, #11); main.py itself stays frozen (#34).
    max_channel = None
    try:
        await telegram.start()
        if settings.max_enabled:
            from app.channels import max_bot

            max_channel = max_bot
            await max_channel.start()
        await scheduler.start()
        yield
    finally:
        await scheduler.stop()
        if max_channel is not None:
            await max_channel.stop()
        await telegram.stop()
        await dispose()


app = FastAPI(title="PTSRaiAgent API", version="0.1.0", lifespan=lifespan)
app.include_router(router)


@app.get("/health")
async def health() -> dict[str, str]:
    return {"status": "ok"}