import time
from threading import Thread

import requests
from django.conf import settings
from rest_framework.exceptions import APIException, ParseError

from apps.utils.errors import DH_REQUEST_ERROR
from apps.utils.tools import print_roundtrip

requests.packages.urllib3.disable_warnings()


class DhClient:
    """
    大华
    """

    def __init__(self, client_id=settings.DAHUA_CLIENTID,
                 client_secret=settings.DAHUA_SECRET) -> None:
        if settings.DAHUA_ENABLED:
            self.client_id = client_id
            self.client_secret = client_secret
            self.headers = {}
            self.isGetingToken = False
            self.isRuning = True
            self.token = None
            self.t = None  # 线程
            self.setup()

    def _get_token_loop(self):
        while self.isRuning:
            params = {
                'grant_type': 'client_credentials',
                'client_id': self.client_id,
                'client_secret': self.client_secret
            }
            r = requests.post(params=params,
                              url=settings.DAHUA_BASE_URL + '/evo-apigw/evo-oauth/oauth/token', verify=False)
            ret = r.json()
            if ret['success']:
                self.token = ret['data']['access_token']
                self.headers['Authorization'] = 'bearer ' + ret['data']['access_token']
                self.headers['User-Id'] = '1'
            time.sleep(3600)

    def setup(self):
        t = Thread(target=self._get_token_loop, args=(), daemon=True)
        t.start()

    def __del__(self):
        """
        自定义销毁
        """
        self.isRuning = False
        # self.t.join()

    def request(self, url: str, method: str, params=dict(), json=dict(), timeout=10,
                file_path_rela=None, raise_exception=True):
        if not settings.DAHUA_ENABLED:
            raise ParseError('大华对接未启用')
        files = None
        if file_path_rela:  # 相对路径
            files = {'file': open(settings.BASE_DIR + file_path_rela, 'rb')}
        try:
            if params:
                url = url.format(**params)
            r = getattr(requests, method)('{}{}'.format(settings.DAHUA_BASE_URL, url),
                                            headers=self.headers, params=params, json=json,
                                            timeout=timeout, files=files, verify=False)
        except Exception:
            if raise_exception:
                raise APIException(**DH_REQUEST_ERROR)
            return 'error', DH_REQUEST_ERROR
        # if settings.DEBUG:
        #     print_roundtrip(r)
        if r.status_code == 200:
            ret = r.json()
            if ret.get('code') == '27001007':
                self.get_token()  # 重新获取token
                self.request(url, method, params, json, timeout, file_path_rela, raise_exception)
            else:
                if ret['code'] not in ['0', '100', '00000', '1000', 0, 100, 1000]:
                    detail = '大华错误:' + \
                        '{}|{}{}{}'.format(str(ret['code']), ret.get('errMsg', ''),
                                            ret.get('desc', ''), str(ret.get('data', '')))
                    err_detail = dict(detail=detail, code='dh_'+str(ret['code']))
                    if raise_exception:
                        raise ParseError(**err_detail)
                    return 'fail', dict(detail=detail, code='dh_'+str(ret['code']))
                return 'success', ret['data'] if 'data' in ret else None
        if raise_exception:
            raise APIException(**DH_REQUEST_ERROR)
        return 'error', DH_REQUEST_ERROR