# coding=utf-8

import json
import xmltodict

from django.db import transaction
from django.http import HttpResponse
from rest_framework.views import APIView

from utils.wx.WXBizMsgCrypt import WXBizMsgCrypt
from utils.exceptions import CustomError
from utils import response_ok, response_error
from utils.wechatpay import WechatPayNotify

from apps.log.models import BizLog
from apps.WechatTp.models import WechatTp
from apps.WechatApplet.models import WechatApplet
from apps.tenant.models import Tenant
from apps.tenant.biz import TenantBiz

class CallbackAuthorize(APIView):
    '''验证票据（component_verify_ticket）在第三方平台创建审核通过后，微信服务器会向其 ”授权事件接收URL”
    每隔 10 分钟以 POST 的方式推送 component_verify_ticket 接收 POST 请求后，只需直接返回字符串 success。
    为了加强安全性，postdata 中的 xml 将使用服务申请时的加解密 key 来进行加密'''

    def post(self, request):
        sMsgSignature = request.GET.get('msg_signature')
        sTimeStamp = request.GET.get('timestamp')
        sNonce = request.GET.get('nonce')
        sPostData = request.body.decode('utf-8')

        try:
            component = WechatTp.getDefault()
            if component:
                appid = component.getAppid()
                msg_crypt = WXBizMsgCrypt(component.getToken(), component.getEncodeKey(), appid)
                ret, decryp_xml = msg_crypt.DecryptMsg(sPostData, sMsgSignature, sTimeStamp, sNonce)
                data = json.loads(json.dumps(xmltodict.parse(decryp_xml)))['xml']
                if data['AppId'] == appid:
                    if data['InfoType'] == 'component_verify_ticket':
                        component.refreshVerifyTicket(data['ComponentVerifyTicket'])
                    elif data['InfoType'] == 'unauthorized':
                        authorizer_appid = data['AuthorizerAppid']
                        authorizer = WechatApplet.getByAppidAndComponentAppid(authorizer_appid, appid)
                        if authorizer:
                            authorizer.revoke()
        except:
            pass

        return HttpResponse('success')

class RedirectAuthorize(APIView):
    '''小程序绑定授权回调'''

    def get(self, request, pk):
        try:
            with transaction.atomic():
                tenant = Tenant.objects.select_for_update().filter(id=pk).first()
                app = TenantBiz.bindWechatApplet(tenant, request.GET.get('auth_code'))
                BizLog.objects.addnew(None, None, BizLog.INSERT, u'租户绑定小程序, id=%d' % app.id)
        except Exception as e:
            return response_error(str(e))
        return response_ok()


class CallbackEvent(APIView):
    '''消息与事件接收'''

    def post(self, request, appid):
        appid = appid
        sMsgSignature = request.GET.get('msg_signature')
        sTimeStamp = request.GET.get('timestamp')
        sNonce = request.GET.get('nonce')
        sPostData = request.body.decode('utf-8')

        try:
            tp = WechatTp.getDefault()
            msg_crypt = WXBizMsgCrypt(tp.getToken(), tp.getEncodeKey(), tp.getAppid())
            ret, decryp_xml = msg_crypt.DecryptMsg(sPostData, sMsgSignature, sTimeStamp, sNonce)
            data = json.loads(json.dumps(xmltodict.parse(decryp_xml)))['xml']
            if data['MsgType'] == 'event':
                app = WechatApplet.getByAppid(appid)
                if data['Event'] == 'weapp_audit_success':  # 代码审核通过
                    app.weapp_audit_success()
                elif data['Event'] == 'weapp_audit_fail':  # 代码审核不通过
                    app.weapp_audit_fail(data['Reason'])
                elif data['Event'] == 'weapp_audit_delay':  # 代码审核延后
                    app.weapp_audit_delay(data['Reason'])
        except:
            pass
        return HttpResponse('success')