from contextlib import asynccontextmanager
from pathlib import Path

from fastapi import FastAPI
from fastapi.staticfiles import StaticFiles

from app import models  # noqa: F401
from app.api.routes import pages, status
from app.api.routes.homeassistant import router as homeassistant_router
from app.api.routes.location import router as location_router
from app.api.routes.poo import router as poo_router
from app.config import get_settings
from scripts.location_db_adopt import LocationDatabaseAdoptionError, validate_location_runtime_db
from scripts.poo_db_adopt import PooDatabaseAdoptionError, validate_poo_runtime_db


def ensure_location_db_ready() -> None:
    settings = get_settings()
    if settings.location_sqlite_path is None:
        return

    try:
        validate_location_runtime_db(settings.location_database_url)
    except LocationDatabaseAdoptionError as exc:
        raise RuntimeError(str(exc)) from exc


def ensure_poo_db_ready() -> None:
    settings = get_settings()
    if settings.poo_sqlite_path is None:
        return

    try:
        validate_poo_runtime_db(settings.poo_database_url)
    except PooDatabaseAdoptionError as exc:
        raise RuntimeError(str(exc)) from exc


def ensure_runtime_dirs() -> None:
    settings = get_settings()
    for path in (settings.location_sqlite_path, settings.poo_sqlite_path):
        if path is not None:
            path.parent.mkdir(parents=True, exist_ok=True)


@asynccontextmanager
async def lifespan(_: FastAPI):
    ensure_runtime_dirs()
    ensure_location_db_ready()
    ensure_poo_db_ready()
    yield


def create_app() -> FastAPI:
    settings = get_settings()
    app = FastAPI(
        title=settings.app_name,
        debug=settings.app_debug,
        version="0.1.0",
        lifespan=lifespan,
        description=(
            "Python rewrite skeleton for the home automation backend. "
            "This stage provides only the foundation for future module migration."
        ),
    )

    static_dir = Path(__file__).parent / "static"
    app.mount("/static", StaticFiles(directory=static_dir), name="static")

    app.include_router(status.router)
    app.include_router(pages.router)
    app.include_router(homeassistant_router)
    app.include_router(location_router)
    app.include_router(poo_router)
    return app


app = create_app()