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

from bulk_update.helper import bulk_update
from django.db import transaction
from django.db.models import Count
from django.views import View

from Model.models import SerialNumberModel, UserModel, UserSerialNumberModel, UserUIDModel, CompanySerialModel, \
    MacModel, LogModel
from Object.RedisObject import RedisObject
from Object.ResponseObject import ResponseObject
from Object.TokenObject import TokenObject
from Service.AlgorithmService import AlgorithmBaseOn35
from Service.CommonService import CommonService
from Service.ModelService import ModelService


class SerialNumberView(View):

    def get(self, request, *args, **kwargs):
        request.encoding = 'utf-8'
        request_dict = request.GET
        operation = kwargs.get('operation')
        return self.validate(request_dict, operation, request)

    def post(self, request, *args, **kwargs):
        request.encoding = 'utf-8'
        request_dict = request.POST
        operation = kwargs.get('operation')
        return self.validate(request_dict, operation, request)

    def validate(self, request_dict, operation, request):
        response = ResponseObject()
        if operation == 'create':
            return self.do_create(request_dict, response)
        elif operation == 'getSerial':
            return self.do_get_serial_number(request_dict, request, response)

        token = request_dict.get('token', None)
        token = TokenObject(token)
        if token.code != 0:
            return response.json(token.code)

        if operation == 'quantity':
            return self.do_quantity(request_dict,token.userID, response)
        elif operation == 'allot':
            return self.do_allot(request_dict, response)
        else:
            return response.json(309)

    # 查询当前可用的UID的数量
    def do_quantity(self, request_dict, userID, response):
        user_qs = UserModel.objects.filter(id=userID)
        if not user_qs.exists():
            return response.json(9)

        user = user_qs[0]

        result = UserSerialNumberModel.objects.filter(user__id=user.id, serial_number__use_status=1).aggregate(num=Count('serial_number__use_status'))
        chenyundev = result['num']
        unused_serial_number_count = SerialNumberModel.objects.filter(use_status=0).count()
        chenyun = SerialNumberModel.objects.filter(use_status=1).count()
        res_data = {'code': 0, 'chenyun': chenyun, 'unused_serial_number_count': unused_serial_number_count, 'chenyundev': chenyundev}
        return response.json(0, {'data': res_data})

    def do_create(self, request_dict, response):
        quantity = int(request_dict.get('quantity', 0))

        if not quantity:
            return response.json(444)

        try:
            try:
                sum = SerialNumberModel.objects.last().id
            except:
                sum = 0
            serial_number_bulk = []
            now_time = int(time.time())
            algorithm = AlgorithmBaseOn35()
            for i in range(quantity):
                serial_number = algorithm.getLetter(sum)
                sum += 1    # sum每次递增1
                # 前面补0至六位
                serial_number = (6-len(serial_number))*'0' + serial_number
                serial_number_bulk.append(SerialNumberModel(serial_number=serial_number, add_time=now_time))
            # 开启事务写入
            with transaction.atomic():
                SerialNumberModel.objects.bulk_create(serial_number_bulk)
            return response.json(0)
        except Exception as e:
            print(e)
            return response.json(500, repr(e))

    # 分配序列号
    @transaction.atomic
    def do_allot(self, request_dict, response):
        username = request_dict.get('username', None)
        quantity = int(request_dict.get('quantity', None))
        token = request_dict.get('token', None)

        token = TokenObject(token)
        if token.code != 0:
            return response.json(token.code)
        user = UserModel.objects.get(id=token.userID)

        if not user or '0' not in user.permission:
            return response.json(404)

        # 要分配的对象
        allot_user_qs = UserModel.objects.filter(username=username)
        if not allot_user_qs.exists():
            return response.json(444, 'username')

        # 取出对应区域可用的UID分配给allot_user
        sn_qs = SerialNumberModel.objects.filter(use_status=0)[0:quantity]
        sns = []
        for sn in sn_qs:
            sns.append(sn.serial_number)

        cs_qs = CompanySerialModel.objects.filter(serial_number__in=sns, status=1)

        sns = []
        for cs in cs_qs:
            sns.append(cs.serial_number)
        sn_qs = SerialNumberModel.objects.filter(serial_number__in=sns)

        count = sn_qs.count()
        if count < quantity:
            return response.json(444, '序列号不足')

        updates = []
        datas = []
        count = 0
        if sn_qs.exists():
            sn_qs = sn_qs[0:quantity]
            now_time = int(time.time())
            for i in range(len(sn_qs)):
                item = sn_qs[i]
                serialNumberModel = SerialNumberModel(
                    id=item.id,
                    serial_number=item.serial_number,
                    status=item.status,
                    use_status=1,
                    add_time=item.add_time
                )
                user_serial_number = UserSerialNumberModel()
                user_serial_number.serial_number = serialNumberModel
                user_serial_number.user = allot_user_qs[0]
                user_serial_number.add_time = now_time
                user_serial_number.update_time = now_time

                datas.append(user_serial_number)
                updates.append(serialNumberModel)

                if len(updates) % 5000 == 0:
                    bulk_update(updates)
                    UserSerialNumberModel.objects.bulk_create(datas)

            if len(updates) > 0:
                bulk_update(updates)
                UserSerialNumberModel.objects.bulk_create(datas)

            del datas
            del updates
            return response.json(0)
        else:
            return response.json(444)

    # 提供给pc端获取序列号
    def do_get_serial_number(self, request_dict, request, response):
        quantity = 1   #只能取一个
        company_id = request_dict.get('company_id', None)
        token = request_dict.get('token', None)
        time_stamp = request_dict.get('time_stamp', None)
        mac = request_dict.get('mac', None)

        if not all([token, time_stamp, company_id]):
            return response.json(444)

        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 or distance > 60000 or distance < -60000:  # 为了全球化时间控制在一天内
            return response.json(404)

        redisObj = RedisObject()
        # redis加锁,防止同时进行其他操作
        serial_operate_lock_key = 'serial_operate_lock'
        isLock = redisObj.CONN.setnx(serial_operate_lock_key, 1)
        if not isLock:
            return response.json(5)
        redisObj.CONN.expire(serial_operate_lock_key, 60)

        key = 'serial_lock'
        value = redisObj.lpop(key)
        count = 0
        while value is False and count < 5:
            time.sleep(1)
            value = redisObj.lpop(key)
            count += 1

        if count == 5 and value is False:  # 暂时注释
            return response.json(5)
        userid = '3'
        user_qs = UserModel.objects.filter(id=userid)
        if not user_qs.exists():
            redisObj.rpush(key, value)
            return response.json(9)

        user = user_qs[0]
        result = UserSerialNumberModel.objects.filter(user__id=user.id, serial_number__use_status=1).\
            aggregate(num=Count('serial_number__use_status'))

        us_qs = UserSerialNumberModel.objects.filter(user__id=user.id, serial_number__use_status=1).\
            values('serial_number__serial_number')

        sns = []
        for us in us_qs:
            sns.append(us['serial_number__serial_number'])

        cs_qs = CompanySerialModel.objects.filter(serial_number__in=sns, status=1, company__secret=company_id).values('serial_number', 'company__mark')
        sns = []
        mark = ""
        if cs_qs.exists():
            for cs in cs_qs:
                sns.append(cs['serial_number'])
            mark = cs_qs[0]['company__mark']

        sn_qs = SerialNumberModel.objects.filter(serial_number__in=sns)
        if not sn_qs.exists():
            return response.json(444, '序列号不足')
        count = result['num']
        if count < quantity:
            redisObj.rpush(key, value)
            return response.json(444, '序列号不足')

        try:
            with transaction.atomic():      # 开启事务
                sn_qs = sn_qs[0: quantity]
                serial_number = sn_qs[0].serial_number
                # 防止重复获取序列号
                is_lock = redisObj.CONN.setnx(serial_number + 'serial_number_lock', 1)
                redisObj.CONN.expire(serial_number + 'serial_number_lock', 60)
                if not is_lock:
                    return response.json(5)

                if not mac:     # 不传入则分配mac
                    mac_qs = MacModel.objects.filter().values('id', 'value', 'is_active')[0]
                    if not mac_qs['is_active']:
                        return response.json(175)
                    mac = mac_qs['value']
                    # 绑定mac地址成功后更新mac表
                    next_mac = CommonService.updateMac(mac)  # mac地址值+1;后3个字节为FF时返回None
                    if next_mac:
                        MacModel.objects.filter().update(value=next_mac, update_time=now_time)  # 更新mac表的mac地址值
                    else:
                        MacModel.objects.filter().update(is_active=False, update_time=now_time)

                # 更新序列号表数据
                serialNumberModel = SerialNumberModel(
                    id=sn_qs[0].id,
                    serial_number=serial_number,
                    status=sn_qs[0].status,
                    use_status=2,
                    add_time=now_time
                )
                updates = []
                updates.append(serialNumberModel)
                bulk_update(updates)

                # 记录操作日志
                ip = CommonService.get_ip_address(request)
                content = json.loads(json.dumps(request.POST))
                operation = '获取序列号:{}'.format(serial_number)
                log = {
                    'status': 200,
                    'content': json.dumps(content),
                    'ip': ip,
                    'time': now_time,
                    'url': 'serialNumber/getSerial',
                    'operation': operation,
                    'user': user_qs[0]
                }
                LogModel.objects.create(**log)
                redisObj.del_data(key=serial_operate_lock_key)  # redis解锁
                redisObj.rpush(key, value)
                return response.json(0, {'serial_number': serial_number + mark, 'mac': mac})
        except Exception as e:
            return response.json(500, repr(e))