"""
Main application entry point for the Enterprise AI Gateway
"""

import os
import time
from dotenv import load_dotenv
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from slowapi import Limiter, _rate_limit_exceeded_handler
from slowapi.util import get_remote_address
from slowapi.errors import RateLimitExceeded

from .config import SERVICE_API_KEY, RATE_LIMIT, ALLOWED_ORIGINS
from .api.routes import router

# Load environment variables
load_dotenv()

# --- FastAPI App Setup ---
app = FastAPI(
    title="Enterprise AI Gateway",
    description="Enterprise-grade AI Gateway with security and fallback protocols.",
    version="1.0.0",
    docs_url="/docs",
    redoc_url="/redoc"
)

# --- CORS & Rate Limiting ---
app.add_middleware(
    CORSMiddleware,
    allow_origins=ALLOWED_ORIGINS,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

limiter = Limiter(key_func=get_remote_address, default_limits=[RATE_LIMIT])
app.state.limiter = limiter
app.add_exception_handler(RateLimitExceeded, _rate_limit_exceeded_handler)

# --- Routes ---
app.include_router(router)

if __name__ == "__main__":
    import uvicorn
    uvicorn.run(app, host="0.0.0.0", port=8000)