#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import hashlib
import json
import time
import uuid

import boto3
from django.views import View

from Model.models import Device_User, Device_Info, RegionCountryModel, iotdeviceInfoModel
from Object.IOTCore.IotObject import ChinaIOTClient, AsiaIOTClient, EuropeIOTClient, AmericaIOTClient
from Object.ResponseObject import ResponseObject
from Service.CommonService import CommonService


class IotCoreView(View):

    def get(self, request, *args, **kwargs):
        request.encoding = 'utf-8'
        request_dict = request.GET
        operation = kwargs.get('operation', None)
        return self.validate(operation, request_dict)

    def post(self, request, *args, **kwargs):
        request.encoding = 'utf-8'
        request_dict = request.POST
        operation = kwargs.get('operation', None)
        return self.validate(operation, request_dict)

    def validate(self, operation, request_dict):

        response = ResponseObject()

        if operation == 'createProvisioningClaim':
            return self.create_provisioning_claim(request_dict, response)
        elif operation == 'createKeysAndCertificate':
            return self.create_keys_and_certificate(request_dict, response)
        else:
            return response.json(404)

    # 即时预置注册  ：已放弃
    def create_provisioning_claim(self, request_dict, response):
        uid = request_dict.get('uid', None)
        token = request_dict.get('token', None)
        time_stamp = request_dict.get('time_stamp', None)

        if uid and token and time_stamp:
            token = int(CommonService.decode_data(token))
            time_stamp = int(time_stamp)

            now_time = int(time.time())
            distance = now_time - time_stamp

            # if token != time_stamp and distance > 600: 暂时去掉延时
            if token != time_stamp :
                return response.json(404)

            region_country_qs = Device_Info.objects.filter(UID=uid).values('userID__region_country')
            if not region_country_qs.exists() or region_country_qs[0]['userID__region_country'] == 0 :
                return response.json(173)

            region_country_qs = RegionCountryModel.objects.filter(number=region_country_qs[0]['userID__region_country'])
            if region_country_qs.exists():
                user_region = region_country_qs[0]

                if user_region.region_id == 1:
                    iotClient = ChinaIOTClient()

                    return response.json(0, {'res': iotClient.create_provisioning_claim('Ansjer_Iot_Queue')})
                elif user_region.region_id == 2:
                    iotClient = AsiaIOTClient()
                    return response.json(0, {'res': iotClient.create_provisioning_claim('Ansjer_Iot_Queue')})
                elif user_region.region_id == 3:
                    iotClient = EuropeIOTClient()
                    return response.json(0, {'res': iotClient.create_provisioning_claim('Ansjer_Iot_Queue')})
                else:
                    iotClient = AmericaIOTClient()
                    return response.json(0, {'res': iotClient.create_provisioning_claim('Ansjer_Iot_Queue')})
        else:
            return response.json(444)

    # CVM注册  ：正使用
    def create_keys_and_certificate(self, request_dict, response):
        uid = request_dict.get('uid', None)
        uid_code = request_dict.get('uid_code', None)
        token = request_dict.get('token', None)
        time_stamp = request_dict.get('time_stamp', None)

        if uid and token and time_stamp and uid_code:
            uid_code = CommonService.decode_data(uid_code)
            token = int(CommonService.decode_data(token))
            time_stamp = int(time_stamp)

            now_time = int(time.time())
            distance = now_time - time_stamp

            # if token != time_stamp and distance > 600: 暂时去掉延时
            if token != time_stamp or uid != uid_code :
                return response.json(404)

            region_country_qs = Device_Info.objects.filter(UID=uid).values('userID__region_country')
            if not region_country_qs.exists() or region_country_qs[0]['userID__region_country'] == 0 :
                return response.json(173)

            iotqs = iotdeviceInfoModel.objects.filter(uid=uid)

            # 判断设备是否已注册证书
            if not iotqs.exists():
                region_country_qs = RegionCountryModel.objects.filter(
                    number=region_country_qs[0]['userID__region_country'])
                if region_country_qs.exists():
                    user_region = region_country_qs[0]

                    if user_region.region_id == 1:
                        iotClient = ChinaIOTClient()

                    elif user_region.region_id == 2:
                        iotClient = AsiaIOTClient()

                    elif user_region.region_id == 3:
                        iotClient = EuropeIOTClient()

                    else:
                        iotClient = AmericaIOTClient()
                    res = iotClient.create_keys_and_certificate(uid)
                    nowTime = int(time.time())
                    token_iot_number = hashlib.md5((str(uuid.uuid1()) + str(nowTime)).encode('utf-8')).hexdigest()
                    Device_Info.objects.filter(UID=uid).update(endpoint=res[0]['endpoint'], token_iot_number=token_iot_number )
                    iotdeviceInfoModel.objects.create(uid=uid, certificateId=res[0]['certificateId'],
                                                      certificatePem=res[0]['certificatePem'],
                                                      publicKey=res[0]['publicKey'],
                                                      privateKey=res[0]['privateKey'],
                                                      Thingname=res[1]['ThingName'])
                    return response.json(0, {'res': res})
            else:
                dev_qs = Device_Info.objects.filter(UID=uid)
                iot = iotdeviceInfoModel.objects.get(uid=uid)
                res = {
                    'certificateId': iot.certificateId,
                    'certificatePem': iot.certificatePem,
                    'publicKey': iot.publicKey,
                    'privateKey': iot.privateKey,
                    'endpoint': dev_qs[0].endpoint
                }
                # print('此设备已注册证书')
                return response.json(0, {'res': res})
        else:
            return response.json(444)