tianpu-ems/backend/app/main.py

import logging
from contextlib import asynccontextmanager
from typing import Optional

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from app.api.router import api_router
from app.api.v1.websocket import start_broadcast_task, stop_broadcast_task
from app.core.config import get_settings
from app.services.simulator import DataSimulator
from app.collectors.manager import CollectorManager

settings = get_settings()
simulator = DataSimulator()
collector_manager: Optional[CollectorManager] = None

logger = logging.getLogger("app")


@asynccontextmanager
async def lifespan(app: FastAPI):
    global collector_manager
    if settings.USE_SIMULATOR:
        logger.info("Starting in SIMULATOR mode")
        await simulator.start()
    else:
        logger.info("Starting in COLLECTOR mode (real IoT devices)")
        collector_manager = CollectorManager()
        await collector_manager.start()
    start_broadcast_task()
    yield
    stop_broadcast_task()
    if settings.USE_SIMULATOR:
        await simulator.stop()
    else:
        if collector_manager:
            await collector_manager.stop()
            collector_manager = None


app = FastAPI(
    title="天普零碳园区智慧能源管理平台",
    description="Tianpu Zero-Carbon Park Smart Energy Management System",
    version="1.0.0",
    lifespan=lifespan,
)

app.add_middleware(
    CORSMiddleware,
    allow_origins=["http://localhost:3000", "http://localhost:5173", "http://127.0.0.1:3000", "http://127.0.0.1:5173"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

app.include_router(api_router)


@app.get("/health")
async def health():
    return {"status": "ok", "app": settings.APP_NAME}