from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from routers import predict, monitor, reports, upload, blockchain
from dotenv import load_dotenv
import os

# Load environment variables
load_dotenv()
# Trigger reload

# Configure root_path
# 1. Try explicit ROOT_PATH env var (User preference)
root_path = os.getenv("ROOT_PATH")

# 2. If not set, try auto-detecting Hugging Face Spaces (Fallback)
if not root_path:
    space_id = os.getenv("SPACE_ID")
    if space_id:
        # SPACE_ID is usually "username/spacename"
        root_path = f"/spaces/{space_id}"
        print(f"Auto-detected HF Space. Setting root_path to: {root_path}")
    else:
        root_path = ""

app = FastAPI(
    title="Network IDS API",
    description="Backend API for Intrusion Detection System",
    version="1.0.0",
    root_path=root_path
)

# Configure CORS
# Default to ["*"] if not set. To restrict, set ALLOWED_ORIGINS="http://localhost:3000,https://my-app.hf.space"
origins_env = os.getenv("ALLOWED_ORIGINS", "*")
if origins_env == "*":
    origins = ["*"]
else:
    origins = [origin.strip() for origin in origins_env.split(",") if origin.strip()]

print(f"Allowed CORS Origins: {origins}")

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

# Routers
app.include_router(predict.router, prefix="/predict", tags=["Prediction"])
app.include_router(monitor.router, prefix="/monitor", tags=["Live Monitor"])
app.include_router(reports.router, prefix="/reports", tags=["Threat Reports"])
app.include_router(upload.router, prefix="/upload", tags=["File Upload"])
app.include_router(blockchain.router, prefix="/blockchain", tags=["Blockchain"])


@app.get("/")
def home():
    return {"message": "Network IDS Backend Running!"}