# -*- coding: utf-8 -*-
#!/usr/bin/env python
import os
import time
import json
import base64
import urllib
import hashlib
import logging

logger = logging.getLogger(__name__)

ACCESS_TOKEN = os.environ.get('FAKE_ACCESS_TOKEN', "N2L7KXa084WvelONYjkJ_traBMCCvy_UKmpUUzlrQ0EA2yNp3Iz6eSUrRG0bhaR_viswd50vDuPkY5nG43d"
               "1gbm-olT2KRMxOsVE08RfeD9lvK9lMguNG9kpIkKGZEjIf8Jv2m9fFhf8bnNa-yQH3g")

OPEN_ID = os.environ.get('TEST_OPEN_ID', "test-ttttttttt_eeeee-sssssst")

class FakeWechatApp(object):

    appid = os.environ.get('FAKE_WECHAT_APPID', 'fakewechatappid')
    secret = os.environ.get('FAKE_WECHAT_SECRET', 'fakewechatsecret')

class FakeWechatAuthClient(object):

    def get_oauth_token(self, auth_code):
        return {
            'access_token': ACCESS_TOKEN,
            'openId': ''
        }

    def jsapi_sign(self, url):
        return {
            'sign': '',
            'noncestr': ''
        }

    @property
    def jsapi_ticket(self):
        return ''

    def get_user_info(self, **kwargs):
        return ''

class FakeWechatAuthBridge(object):
    # 静默跳转，无需用户点击授权
    AUTH_SCOPE_BASE = 'snsapi_base'
    # 需要用户显式点击授权
    AUTH_SCOPE_USER = 'snsapi_userinfo'

    PROD_AUTH_CALLBACK_URL_TMPL = \
        '{redirect_uri}?scope={scope}&state={state}&connect_redirect=1#wechat_redirect'

    GET_USER_OPENID_LIST_URL = 'https://api.weixin.qq.com/cgi-bin/user/get?access_token=ACCESS_TOKEN&next_openid=NEXT_OPENID'

    TOKEN_CACHE_KEY = 'access_token_from_{appid}_{code}'
    GZH_TOKEN_CACHE_KEY = 'gzh_access_token_from_{appId}'

    def __init__(self, app, redirect_uri=None):
        self._appid = app['appid']
        self._secret = app['secret']
        self._redirect_uri = redirect_uri

    def __repr__(self):
        return '<FakeWechatAuthBridge(appid=%s, secret=%s, redirect_uri=%s)>' \
               % (self._appid, self._secret, self._redirect_uri)

    @property
    def appid(self):
        return self._appid

    @property
    def secret(self):
        return self._secret

    @property
    def client(self):
        return FakeWechatAuthClient()

    def authorize(self, auth_code):
        """微信oauth授权，经销商和用户都有涉及"""
        if auth_code is None:
            logger.debug('[wechat authorize]failure. code is null. bridge = %s' % repr(self))
            return None
        try:
            openId = self.client.get_oauth_token(auth_code).get('openid')

            logger.debug('[wechat authorize]success. code = %s. bridge = %s; openid = %s' % (auth_code, repr(self), openId))

            return openId
        except Exception, e:
            logger.exception('[wechat authorize]exception, bridge = %s; error = %s' % (repr(self), str(e),))
            return None

    def need_authorize(self, appId):
        if self.appid == appId:
            return False
        else:
            return True

    def get_user_info(self, auth_code):
        logger.debug('[wechat get_user_info]. code = %s' % auth_code)

        rv = self.client.get_oauth_token(auth_code)
        return self.client.get_user_info(openid=rv['openid'], access_token=rv['access_token'])

    def _sign(self, payload):
        raw = [(k, payload[k]) for k in sorted(payload.keys())]
        s = '&'.join('='.join(kv) for kv in raw if kv[1])
        return hashlib.sha1(s.encode("utf-8")).hexdigest().lower()

    def generate_js_auth_signature(self, url='/app/index.html'):
        """
        生成签名信息，主要供经销商获取扫码权限
        :return:
        """

        signDict = self.client.jsapi_sign(url=url)
        return {
            'signature': signDict['sign'],
            'appId': self.appid,
            'jsapi_ticket': self.client.jsapi_ticket,
            'url': url,
            'timestamp': str(int(time.time())),
            'nonceStr': signDict['noncestr']
        }

    def generate_auth_url(self, redirect_uri, state='', scope=AUTH_SCOPE_BASE):
        """
        生成授权url
        :param redirect_uri:
        :param state:
        :param scope:
        :return:
        """

        return self.PROD_AUTH_CALLBACK_URL_TMPL.format(
            redirect_uri=redirect_uri,
            state=state,
            scope=scope)

    def generate_auth_url_base_scope(self, redirect_uri, state=''):
        logger.debug('response redirect. bridge = %s, type = %s, redirect_uri = %s; state = %s' % (
        repr(self), self.AUTH_SCOPE_BASE, redirect_uri, state))
        return self.generate_auth_url(redirect_uri=redirect_uri, state=state, scope=self.AUTH_SCOPE_BASE)

    def generate_auth_url_user_scope(self, redirect_uri, state=''):
        logger.debug('response redirect. bridge = %s, type = %s, redirect_uri = %s; state = %s' % (
        repr(self), self.AUTH_SCOPE_USER, redirect_uri, state))
        return self.generate_auth_url(redirect_uri=redirect_uri, state=state, scope=self.AUTH_SCOPE_USER)

    @staticmethod
    def encode_state(state):
        return base64.b64encode(json.dumps(state))

    @staticmethod
    def parse_state(state_str):
        return json.loads(base64.b64decode(state_str))

    def is_subscribe_gzh(self, openId):
        return True

__all__ = ['FakeWechatAuthBridge']