from django.shortcuts import render
from rest_framework.exceptions import ValidationError
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import serializers, status
from django_redis import get_redis_connection
from rest_framework.permissions import AllowAny
from .models import UserInfo
from rest_framework.authtoken.models import Token
import random
# Create your views here.
import uuid
import re


def phone_validator(value):
    if not re.match(r'^(1[3|4|5|6|7|8|9])\d{9}$', value):
        raise ValidationError('手机格式错误')


class LoginSerializer(serializers.Serializer):
    phone = serializers.CharField(label='手机号', validators=[phone_validator])
    code = serializers.CharField(label='短信验证码')

    def validate_code(self, value):
        if len(value) != 4:
            raise ValidationError('短信格式错误')
        if not value.isdecimal():
            raise ValidationError("短信格式错误")

        phone = self.initial_data.get('phone')
        conn = get_redis_connection()
        code = conn.get(phone)

        if not code:
            raise ValidationError("验证码过期")
        if value != code.decode('utf-8'):
            raise ValidationError("验证码错误")
        return value


class MessageSerializer(serializers.Serializer):
    phone = serializers.CharField(label='手机号', validators=[phone_validator])


class MessageView(APIView):
    permission_classes = [AllowAny]

    def get(self, request, *args, **kwargs):
        ser = MessageSerializer(data=request.query_params)
        if not ser.is_valid():
            return Response({'status': False, 'message': '手机号错误'})

        phone = ser.validated_data.get('phone')
        random_code = random.randint(1000, 9999)
        print(random_code)
        conn = get_redis_connection()
        conn.set(phone, random_code, ex=60)

        return Response({'status': True, 'message': '发送成功', 'code': random_code})


class LoginView(APIView):
    permission_classes = [AllowAny]

    def post(self, request, *args, **kwargs):
        ser = LoginSerializer(data=request.data)
        if not ser.is_valid():
            return Response({'status': False, 'message': ser.errors})

        phone = ser.validated_data.get('phone')

        # 获取或创建用户
        user, created = UserInfo.objects.get_or_create(
            phone=phone,
            defaults={'username': phone}  # 确保username与phone相同
        )

        # 获取或创建DRF Token
        token, _ = Token.objects.get_or_create(user=user)

        return Response({
            'status': True,
            'data': {
                'token': token.key,
                'phone': phone,
                'id': user.id
            }
        })