from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware

from app.api import api_router
from app.config import get_settings

settings = get_settings()

app = FastAPI(
    title=settings.app_name,
    version="1.0.0",
    description="LSTM-based stock prediction API for the QuantMind dashboard.",
)

app.add_middleware(
    CORSMiddleware,
    allow_origins=settings.cors_origins,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)


@app.on_event("startup")
def startup_event():
    # Fail fast if critical config is missing
    settings.validate()
    print("[Startup] QuantMind backend initialized successfully")


app.include_router(api_router)