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import logging
from contextlib import asynccontextmanager
from fastapi import FastAPI, HTTPException
from fastapi.exceptions import RequestValidationError
from starlette.exceptions import HTTPException as StarletteHTTPException
# Import routers
from api.routers import medical, health
from api.middleware import (
ProcessTimeMiddleware,
LoggingMiddleware,
RateLimitMiddleware,
get_cors_middleware_config
)
from fastapi.middleware.cors import CORSMiddleware
from api.exceptions import (
http_exception_handler,
validation_exception_handler,
general_exception_handler,
starlette_exception_handler
)
# Configure logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)
@asynccontextmanager
async def lifespan(app: FastAPI):
"""Application lifespan management with background initialization"""
# Startup
logger.info("Starting Medical RAG AI Advisor API...")
# Start background initialization of heavy components
try:
from core.background_init import start_background_initialization
logger.info("🚀 Starting background initialization of components...")
start_background_initialization()
logger.info("API started successfully (components loading in background)")
except Exception as e:
logger.error(f"Failed to start background initialization: {e}")
logger.info("API started with lazy loading fallback")
yield
# Shutdown
logger.info("Shutting down Medical RAG AI Advisor API...")
# Create FastAPI application
app = FastAPI(
title="Medical RAG AI Advisor API",
description="Professional API for medical information retrieval and advisory services",
version="1.0.0",
docs_url="/docs",
redoc_url="/redoc",
lifespan=lifespan
)
# Add middleware
app.add_middleware(CORSMiddleware, **get_cors_middleware_config())
app.add_middleware(ProcessTimeMiddleware)
app.add_middleware(LoggingMiddleware)
app.add_middleware(RateLimitMiddleware, calls_per_minute=100) # Adjust as needed
# Add exception handlers
app.add_exception_handler(HTTPException, http_exception_handler)
app.add_exception_handler(RequestValidationError, validation_exception_handler)
app.add_exception_handler(StarletteHTTPException, starlette_exception_handler)
app.add_exception_handler(Exception, general_exception_handler)
# Include routers
app.include_router(health.router)
app.include_router(medical.router)
# Root endpoint
@app.get("/")
async def root():
"""Root endpoint with API information"""
return {
"name": "Medical RAG AI Advisor API",
"version": "1.0.0",
"description": "Professional API for medical information retrieval and advisory services",
"docs": "/docs",
"health": "/health",
"endpoints": {
"ask": "/ask",
"ask_stream": "/ask/stream",
"initialization_status": "/health/initialization"
}
}
if __name__ == "__main__":
import uvicorn
uvicorn.run(
"api.app:app",
host="127.0.0.1",
port=8000,
reload=True,
log_level="info"
)
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