"""
web_admin auth serializers file
"""
# python imports
from datetime import datetime

# django imports
from rest_framework import serializers
from django.contrib.auth import get_user_model
from django.utils import timezone

# local imports
from account.models import UserEmailOtp
from base.constants import USER_TYPE
from base.messages import ERROR_CODE
from guardian.tasks import generate_otp
from base.tasks import send_mail

USER = get_user_model()


class AdminOTPSerializer(serializers.ModelSerializer):
    """
    admin forgot password serializer
    """
    email = serializers.EmailField()

    class Meta:
        """
        meta class
        """
        model = USER
        fields = ('email',)

    def validate(self, attrs):
        """ used to validate the incoming data """
        user = USER.objects.filter(email=attrs.get('email')).first()
        if not user:
            raise serializers.ValidationError({'details': ERROR_CODE['2004']})
        elif not user.is_superuser:
            raise serializers.ValidationError({'details': ERROR_CODE['2063']})
        attrs.update({'user': user})
        return attrs

    def create(self, validated_data):
        """
        to send otp
        :return: user_data
        """
        email = validated_data['email']
        verification_code = generate_otp()
        template = 'email_reset_verification.email'
        # Send the verification code to the user's email
        data = {
            "verification_code": verification_code
        }
        send_mail.delay([email], template, data)

        expiry = timezone.now() + timezone.timedelta(days=1)
        user_data, created = UserEmailOtp.objects.update_or_create(email=email,
                                                                   defaults={
                                                                       "otp": verification_code,
                                                                       "expired_at": expiry,
                                                                       "user_type": dict(USER_TYPE).get('3'),
                                                                   })

        return user_data


class AdminVerifyOTPSerializer(serializers.Serializer):
    """
    admin verify otp serializer
    """
    email = serializers.EmailField()
    otp = serializers.CharField(max_length=6, min_length=6)

    class Meta:
        """ meta class """
        fields = ('email', 'otp',)

    def validate(self, attrs):
        """
        to validate data
        :return: validated data
        """
        email = attrs.get('email')
        otp = attrs.get('otp')

        # fetch email otp object of the user
        user_otp_details = UserEmailOtp.objects.filter(email=email, otp=otp).last()
        if not user_otp_details:
            raise serializers.ValidationError({'details': ERROR_CODE['2008']})
        if user_otp_details.user_type != dict(USER_TYPE).get('3'):
            raise serializers.ValidationError({'details': ERROR_CODE['2008']})
        if user_otp_details.expired_at.replace(tzinfo=None) < datetime.utcnow():
            raise serializers.ValidationError({'details': ERROR_CODE['2029']})
        user_otp_details.is_verified = True
        user_otp_details.save()
        return attrs


class AdminCreatePasswordSerializer(serializers.ModelSerializer):
    """
    admin create new password serializer
    """
    email = serializers.EmailField()
    new_password = serializers.CharField()
    confirm_password = serializers.CharField()

    class Meta:
        """
        meta class
        """
        model = USER
        fields = ('email', 'new_password', 'confirm_password')

    def validate(self, attrs):
        """
        to validate data
        :return: validated data
        """
        email = attrs.get('email')
        new_password = attrs.get('new_password')
        confirm_password = attrs.get('confirm_password')

        # matching password
        if new_password != confirm_password:
            raise serializers.ValidationError({'details': ERROR_CODE['2065']})

        user_otp_details = UserEmailOtp.objects.filter(email=email, is_verified=True).last()
        if not user_otp_details:
            raise serializers.ValidationError({'details': ERROR_CODE['2064']})
        if user_otp_details.user_type != dict(USER_TYPE).get('3'):
            raise serializers.ValidationError({'details': ERROR_CODE['2063']})
        user_otp_details.delete()
        return attrs