import random
from fastapi import FastAPI
from contextlib import asynccontextmanager
import uvicorn
from pathlib import Path
from datetime import datetime
from typing import List, Dict, Optional
from pydantic import BaseModel
import yaml
import asyncio
import httpx
from config.settings import settings
from routers.subscriptions import router
from routers.mihomo import mihomo_router,stop_all_mihomo,get_mihomo_running_status
from utils.mihomo_service import download_mihomo
from database.engine import create_db_and_tables
from aiomultiprocess import Pool
from utils.processes_mgr import process_manager
@asynccontextmanager
async def lifespan(app: FastAPI):
    """应用生命周期管理"""
    # 初始化目录结构
    settings.PATH_CONFIG_DIR.mkdir(parents=True, exist_ok=True)
    settings.PATH_SUBSCRIPTION_DIR.mkdir(parents=True, exist_ok=True)
    create_db_and_tables()
    # 检查并下载mihomo
    await download_mihomo()
    await stop_all_mihomo()
    yield
    process_manager.stop_all_processes()

app = FastAPI(lifespan=lifespan)

# 注册路由
app.include_router(router, prefix="/subscriptions", tags=["订阅管理"])
app.include_router(mihomo_router, prefix="/mihomo", tags=["mihomo管理"])

# 添加健康检查路由
@app.get("/health")
async def health_check():
    """服务健康检查"""
    return {"status": "healthy"}

@app.get("/")
async def root():
    return {
        "message": "代理池管理API",
        "endpoints": {
            "/docs": "API文档",
            "/configs": "配置管理",
            "/subscriptions": "订阅管理"
        }
    }

@app.get("/get")
async def get_random_proxy():
    results = await get_mihomo_running_status()
    if not results:
        return {"message": "No running mihomo instances", 'code': 404}
    active_results = []
    for result in results:
        if result.delay is not None and result.delay < 2000:
            active_results.append(result.mixed_port) 
    return {"port": random.choice(active_results)}

if __name__ == "__main__":
    uvicorn.run("main:app", host=settings.HOST, port=settings.PORT, reload=False)