from config.env import env
from django.contrib.auth import get_user_model
from django.utils.translation import gettext as _
from rest_framework import exceptions, serializers

OTP_SIZE = env.int("OTP_SIZE", 4)


class LoginSerializer(serializers.Serializer):
    phone = serializers.CharField(max_length=255)


class RegisterSerializer(serializers.ModelSerializer):
    phone = serializers.CharField(max_length=255)

    def validate_phone(self, value):
        user = get_user_model().objects.filter(phone=value, validated_at__isnull=False)
        if user.exists():
            raise exceptions.ValidationError(_("Phone number already registered."), code="unique")
        return value

    class Meta:
        model = get_user_model()
        fields = ["phone"]


class ConfirmSerializer(serializers.Serializer):
    code = serializers.CharField(max_length=OTP_SIZE, min_length=OTP_SIZE)
    phone = serializers.CharField(max_length=255)


class ResetPasswordSerializer(serializers.Serializer):
    phone = serializers.CharField(max_length=255)

    def validate_phone(self, value):
        user = get_user_model().objects.filter(phone=value)
        if user.exists():
            return value

        raise serializers.ValidationError(_("User does not exist"))


class ResetConfirmationSerializer(serializers.Serializer):
    code = serializers.CharField(min_length=OTP_SIZE, max_length=OTP_SIZE)
    phone = serializers.CharField(max_length=255)

    def validate_phone(self, value):
        user = get_user_model().objects.filter(phone=value)
        if user.exists():
            return value
        raise serializers.ValidationError(_("User does not exist"))


class ResendSerializer(serializers.Serializer):
    phone = serializers.CharField(max_length=255)