#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import base64
import json
import time
import xlwt

from django.http import StreamingHttpResponse, HttpResponse, QueryDict
from django.utils.decorators import method_decorator
from django.views import View
from django.views.decorators.csrf import csrf_exempt
from django.db import transaction

from Model.models import UIDModel, UserUIDModel, UserModel, LogModel, MacModel
from Object.RedisObject import RedisObject
from Object.TokenObject import TokenObject
from Object.ResponseObject import ResponseObject
from Service.CommonService import CommonService


class UploadUIDFileView(View):

    @method_decorator(csrf_exempt)
    def dispatch(self, request, *args, **kwargs):
        return super(UploadUIDFileView, self).dispatch(request, *args, **kwargs)

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

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

    def validate(self, fileName, request_dict, request):
        token = request_dict.get('token', None)
        area = request_dict.get('area', None)
        isReset = request_dict.get('isReset', 0)
        content = request_dict.get('fileName', None)
        # print('content')
        # print(content)

        content = base64.b64decode(content).decode().strip()
        content = content[3:(len(content) - 3)]
        uids = content.split('\n')
        # print(uids)
        # print(len(uids))

        response = ResponseObject()

        tko = TokenObject(token)
        if tko.code != 0:
            return response.json(tko.code)

        # if not fileName and not area:
        #     return response.json(444, 'fileName,area')

        data = {}
        duplicate = []
        for line in uids:

            if data.__contains__(line):
                duplicate.append(line)
            else:
                data[line] = ''

        if isReset == 0:
            return self.do_insert(data, duplicate, area, response, request, tko)
        else:
            return self.do_reset(data, response, area, request, tko)

    @transaction.atomic
    def do_insert(self, data, duplicate, area, response, request, token):
        bulk = []
        count = 0
        add_time = int(time.time())
        update_time = int(time.time())
        keys = data.keys()

        # 获取最新的mac
        mac = MacModel.objects.filter().values('id', 'value', 'is_active')[0]
        if not mac['is_active']:
            return response.json(175)
        # redisObject = RedisObject(db=3)
        key = ''
        tmpMac = mac['value']
        savePoint = None
        for item in keys:
            key = item.strip()
            # value = redisObject.get_data(key)
            # if value is False:
            #     # redisObject.set_data(key, '1', 600)
            # else:
            #     duplicate.append(key)
            #     continue
            bulk.append(UIDModel(
                uid=item.strip(),
                uid_extra='',
                status=0,
                add_time=add_time,
                update_time=update_time,
                area=area,
                mac=mac['value']
            ))
            try:
                try:
                    if (count % 5000) == 0:
                        savePoint = transaction.savepoint()
                        UIDModel.objects.bulk_create(bulk)
                        bulk.clear()
                        data = {
                            'value': mac['value'],
                            'is_active': tmpMac is not None
                        }
                        MacModel.objects.filter().update(**data)
                except Exception as e:
                    print('--------------------------error 5000')
                    print(repr(e))
                    if savePoint:
                        transaction.rollback(savePoint)
                    return response.json(174, str(e))
                else:
                    savePoint = None
            except Exception as e:
                print('--------------------------error 5001')
                print(repr(e))
                return response.json(174, str(e))
            count += 1
            tmpMac = CommonService.updateMac(mac['value'])
            if tmpMac is None:
                # 能分配的mac已用完
                break
            else:
                mac['value'] = tmpMac

        # 当bulk不足5000时，还有数据要插入
        try:
            try:
                savePoint = transaction.savepoint()  # 事务保存点
                if len(bulk) > 0:
                    result = UIDModel.objects.bulk_create(bulk)
                    print('result is ')
                    print(result)
                    print()
                    print()
                    print('bulk is ')
                    print(bulk)
                    bulk.clear()
            except Exception as e:
                print('--------------------------error')
                print(repr(e))
                if savePoint:
                    transaction.rollback(savePoint)
                return response.json(174)
            else:
                del data
                del bulk
                data = {
                    'value': mac['value'],
                    'is_active': tmpMac is not None
                }
                MacModel.objects.filter().update(**data)
        except Exception as e:
            print('--------------------------error 1111')
            print(repr(e))
            return response.json(174)

        # print('重复：')
        # print(duplicate)

        operation = self.formatOperation(operation='上传', quantity=int(count), area=int(area))
        self.add_log(request, operation, token)

        if tmpMac is None:
            return response.json(175, {'last_uid': key})
        return response.json(0, {'count': count, 'duplicate_count': len(duplicate), 'data': duplicate})

    def do_reset(self, data, response, area, request, token):
        keys = data.keys()
        uids = []
        count = 0
        for key in keys:
            uids.append(key)
            if len(uids) % 5000 == 0:
                count += self.do_update_uid_status(uids, area)
                uids.clear()

        if len(uids) > 0:
            count += self.do_update_uid_status(uids, area)
            uids.clear()

        operation = self.formatOperation('重置', int(count), int(area))
        self.add_log(request, operation, token)
        return response.json(0)

    def do_update_uid_status(self, uids, area):
        uid_qs = UIDModel.objects.filter(uid__in=uids, area=area, status=2)
        if uid_qs.exists():
            for uid in uid_qs:
                if uid.status == 2:
                    uid.status = 1
            UIDModel.objects.bulk_update(uid_qs, fields=['status'])
            return uid_qs.count()
        return 0

    def add_log(self, request, operation, token):
        ip = CommonService.get_ip_address(request)
        now_time = time.time()
        content = json.dumps(request.POST)
        user_qs = UserModel.objects.filter(id=token.userID)

        log = {
            'status': 200,
            'content': content,
            'ip': ip,
            'time': now_time,
            'url': 'upload',
            'operation': operation,
            'user': user_qs[0]
        }

        try:
            LogModel.objects.create(**log)
        except Exception as e:
            print(repr(e))

    def formatOperation(self, operation, quantity, area):
        str = '{operation}{quantity}个{area}UID'
        if area == 0:
            return str.format(operation=operation, quantity=quantity, area='国内')
        else:
            return str.format(operation=operation, quantity=quantity, area='国外')


class DownloadUIDFileView(View):

    @method_decorator(csrf_exempt)
    def dispatch(self, request, *args, **kwargs):
        return super(DownloadUIDFileView, self).dispatch(request, *args, **kwargs)

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

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

    def validate(self, request_dict):
        token = request_dict.get('token', None)
        area = request_dict.get('area', None)
        quantity = int(request_dict.get('quantity', None))
        fileType = request_dict.get('fileType', None)
        response = ResponseObject()

        # print(area)
        # print(quantity)
        token = TokenObject(token)
        if token.code != 0:
            return response.json(token.code)

        if not area:
            return response.json(444, 'area')

        area = int(area)

        if area >= 0 and quantity > 0:

            uid_qs = UserUIDModel.objects.filter(user__id=token.userID, uid__status=1, uid__area=area). \
                values('uid__id', 'uid__uid', 'uid__mac', 'uid__uid_extra', 'uid__add_time', 'uid__update_time', 'uid__area')
            count = uid_qs.count()
            if count < quantity:
                return response.json(444, '设备UID不足')

            if uid_qs.exists():
                uid_qs = uid_qs[0:quantity]
                if fileType == 'txt':
                    return self.download_txt(uid_qs)
                elif fileType == 'excel':
                    return self.download_excel(uid_qs)
                else:
                    return response.json(444, 'fileType')
            else:
                return response.json(444, '111')
        else:
            return response.json(444, '222')

    def download_txt(self, uid_qs):
        updates = []
        content = ''
        for item in uid_qs:
            # print(item)
            mac: str = item['uid__mac']
            index = mac.rfind(':')
            tmp = mac[0:index] + '\t' + mac[index:]
            content += tmp + '\t'
            content += item['uid__uid']
            content += '\r\n'
            updates.append(UIDModel(
                id=item['uid__id'],
                uid=item['uid__uid'],
                mac=item['uid__mac'],
                uid_extra=item['uid__uid_extra'],
                status=2,
                add_time=item['uid__add_time'],
                update_time=item['uid__update_time'],
                area=item['uid__area']
            ))
            if len(updates) % 5000 == 0:
                UIDModel.objects.bulk_update(updates, fields=["status"])
                updates.clear()
            # print(item['uid__uid'])

        if len(updates) > 0:
            UIDModel.objects.bulk_update(updates, fields=["status"])
            updates.clear()

        del updates
        content = content[0:len(content) - 1]
        response = StreamingHttpResponse(content)
        response['Content-Type'] = 'application/octet-stream'
        response['Content-Disposition'] = 'attachment;filename=UID'+time.strftime('-%Y-%m-%d-%H-%M-%S', time.localtime()) + '.txt'
        return response

    def download_excel(self, uid_qs):
        response = HttpResponse(content_type='application/vnd.ms-excel')
        response['Content-Disposition'] = 'attachment; filename=UID' + time.strftime('-%Y-%m-%d-%H-%M-%S', time.localtime()) + '.xls'
        workbook = xlwt.Workbook(encoding='utf-8')
        sheet1 = workbook.add_sheet('UID')
        row1 = [u'设备UID']
        for i in range(0, len(row1)):
            sheet1.write(0, i, row1[i])

        num = 1
        updates = []
        for item in uid_qs:
            uid = item['uid']
            sheet1.write(num, 0, uid)
            num += 1
            updates.append(UIDModel(
                id=item['id'],
                uid=item['uid'],
                uid_extra=item['uid_extra'],
                status=1,
                add_time=item['add_time'],
                update_time=item['update_time'],
                area=item['area']
            ))

        UIDModel.objects.bulk_update(updates, fields=["status"])
        workbook.save(response)
        return response