#!/usr/bin/env python
# encoding: utf-8


"""
@version: ??
@author: liangliangyy
@license: MIT Licence
@contact: liangliangyy@gmail.com
@site: https://www.lylinux.org/
@software: PyCharm
@file: oauthmanager.py
@time: 2016/11/26 下午5:09
"""

from abc import ABCMeta, abstractmethod, abstractproperty
import requests
import json
import urllib.parse


class BaseManager(metaclass=ABCMeta):
    """获取用户授权"""
    AUTH_URL = None
    """获取token"""
    TOKEN_URL = None
    """获取用户信息"""
    API_URL = None

    def __init__(self, client_id, client_secret, callback_url, access_token=None, openid=None):
        self.client_id = client_id
        self.client_secret = client_secret
        self.callback_url = callback_url
        self.access_token = access_token
        self.openid = openid

    @property
    def is_access_token_set(self):
        return self.access_token != None

    @property
    def is_authorized(self):
        return self.is_access_token_set and self.access_token != None and self.openid != None

    @abstractmethod
    def get_authorization_url(self):
        pass

    @abstractmethod
    def get_access_token_by_code(self, code):
        pass

    @abstractmethod
    def get_oauth_userinfo(self):
        pass

    def do_get(self, url, params):
        rsp = requests.get(url=url, params=params)
        return rsp.text

    def do_post(self, url, params):
        rsp = requests.post(url, params)
        return rsp.text


class WBOauthManager(BaseManager):
    AUTH_URL = 'https://api.weibo.com/oauth2/authorize'
    TOKEN_URL = 'https://api.weibo.com/oauth2/access_token'
    API_URL = 'https://api.weibo.com/2/users/show.json'

    def __init__(self, client_id, client_secret, callback_url, access_token=None, openid=None):
        super(WBOauthManager, self).__init__(client_id=client_id, client_secret=client_secret,
                                             callback_url=callback_url, access_token=access_token, openid=openid)

    def get_authorization_url(self):
        params = {
            'client_id': self.client_id,
            'response_type': 'code',
            'redirect_uri': self.callback_url
        }
        url = self.AUTH_URL + "?" + urllib.parse.urlencode(params)
        return url

    def get_access_token_by_code(self, code):
        print(code)
        params = {
            'client_id': self.client_id,
            'client_secret': self.client_secret,
            'grant_type': 'authorization_code',
            'code': code,
            'redirect_uri': self.callback_url
        }
        rsp = self.do_post(self.TOKEN_URL, params)
        print(rsp)
        # return rsp

        obj = json.loads(rsp)
        self.access_token = str(obj['access_token'])
        self.openid = str(obj['uid'])
        return self.get_oauth_userinfo()

        try:
            self.access_token = str(obj['access_token'])
            self.openid = str(obj['uid'])
            return self.get_oauth_userinfo()
        except:
            return None

    def get_oauth_userinfo(self):
        if not self.is_authorized:
            return None
        params = {
            'uid': self.openid,
            'access_token': self.access_token
        }
        rsp = self.do_get(self.API_URL, params)
        print(rsp)
