import json
import subprocess

from config import info_topic


# 统一返回
def publish_payload(code, msg):
    return json.dumps({
        "code": code,
        "msg": msg
    }, ensure_ascii=False)


def exception_handler(func):
    def wrapper(*args, **kwargs):
        try:
            return func(*args, **kwargs)
        except Exception as e:
            print(f"函数{func.__name__}中发生了异常：{e}")

    return wrapper


def push_stream(client):
    p = subprocess.Popen(['/bin/bash /home/pi/agri_xumu/bash/start_push_stream.sh'],
                         shell=True,
                         stdout=subprocess.PIPE,
                         stderr=subprocess.PIPE)
    out, err = p.communicate()
    output = out.decode('utf-8').strip()
    client.publish(info_topic, payload=publish_payload(200, output), qos=0)


def close_stream(client):
    p = subprocess.Popen(['/bin/bash /home/pi/agri_xumu/bash/stop_push_stream.sh'],
                         shell=True,
                         stdout=subprocess.PIPE,
                         stderr=subprocess.PIPE)
    out, err = p.communicate()
    output = out.decode('utf-8').strip()
    client.publish(info_topic, payload=publish_payload(code=200, msg=output), qos=0)


def exec_sh(msg, client):
    origin_data = json.loads(msg.payload.decode('utf-8'))
    if 'data' not in origin_data:
        client.publish(info_topic, payload=publish_payload(code=404, msg='data must be supplied'), qos=0)
        return
    cmd = origin_data["data"]
    if cmd in ["supervisorctl stop __mqtt__",
               "supervisorctl restart __mqtt__",
               "supervisorctl stop all"]:
        return
    if cmd == "supervisorctl reload":
        client.publish(info_topic, payload=publish_payload(code=200, msg='reloading'), qos=0)
        subprocess.Popen([cmd], shell=True)
        return
    p = subprocess.Popen([cmd], shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    out, err = p.communicate()
    output = out.decode('utf-8').strip()
    client.publish(info_topic, payload=publish_payload(code=200, msg=output), qos=0)


def get_status(client):
    p = subprocess.Popen(['supervisorctl status'],
                         shell=True,
                         stdout=subprocess.PIPE,
                         stderr=subprocess.PIPE)
    out, err = p.communicate()
    output = out.decode('utf-8').strip()
    client.publish(info_topic, payload=publish_payload(code=200, msg=output), qos=0)


def update(client):
    p = subprocess.Popen(['/bin/bash /home/pi/agri_xumu/git_update.sh'],
                         shell=True,
                         stdout=subprocess.PIPE,
                         stderr=subprocess.PIPE)
    out, err = p.communicate()
    output = out.decode('utf-8').strip()
    client.publish(info_topic, payload=publish_payload(code=200, msg=output),
                   qos=0)


def reload(client):
    client.publish(info_topic, payload=publish_payload(200, "reloading"), qos=0)
    subprocess.Popen(['supervisorctl reload'], shell=True)