import logging
from contextlib import asynccontextmanager

from fastapi import Depends, FastAPI, HTTPException, Header
from pydantic import BaseModel, Field

from app import calling
from app.config import settings

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger("callsvc.main")


@asynccontextmanager
async def lifespan(_: FastAPI):
    await calling.start()
    yield
    await calling.stop()


app = FastAPI(title="Telegram Call Service", lifespan=lifespan)


class CallRequest(BaseModel):
    text: str = Field(..., min_length=1, max_length=2000, description="Текст для озвучки TTS")
    target: int | str | None = Field(
        default=None,
        description=(
            "Кому звонить: @username или numeric user id. "
            "Если не задан — берётся CALL_TARGET из .env"
        ),
    )


def check_auth(authorization: str | None = Header(default=None)):
    if not settings.api_token:
        return
    expected = f"Bearer {settings.api_token}"
    if authorization != expected:
        raise HTTPException(status_code=401, detail="Invalid or missing bearer token")


@app.get("/health")
async def health():
    return {"status": "ok"}


@app.post("/call", dependencies=[Depends(check_auth)])
async def call(req: CallRequest):
    try:
        result = await calling.make_call(req.text, req.target)
    except RuntimeError as exc:
        raise HTTPException(status_code=409, detail=str(exc)) from exc
    except Exception as exc:  # noqa: BLE001
        logger.exception("Call failed")
        raise HTTPException(status_code=500, detail=str(exc)) from exc

    return {"status": "called", **result}