from contextlib import asynccontextmanager
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from sqlalchemy import text
from app.core.config import settings
from app.db.session import Base, engine
from app.models import KnowledgeItem  # noqa: F401
from app.api.routes import health, chat, knowledge

@asynccontextmanager
async def lifespan(app: FastAPI):
    # Convenience for local bootstrap. Use Alembic migrations before production.
    with engine.begin() as connection:
        connection.execute(text("CREATE EXTENSION IF NOT EXISTS vector"))
    Base.metadata.create_all(bind=engine)
    yield

app = FastAPI(title=settings.app_name, version="0.1.0", lifespan=lifespan)
app.add_middleware(CORSMiddleware, allow_origins=settings.cors_origin_list, allow_credentials=True, allow_methods=["*"], allow_headers=["*"])
app.include_router(health.router, prefix=settings.api_prefix)
app.include_router(chat.router, prefix=settings.api_prefix)
app.include_router(knowledge.router, prefix=settings.api_prefix)
@app.get("/")
def root():
    return {"message": "Nalati Tourism QA API", "docs": "/docs"}