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):
    username = serializers.CharField(max_length=255)
    password = serializers.CharField(max_length=255)



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

    def validate(self, data):
        if data["password"]!=data["confirm_password"]:
            raise serializers.ValidationError(
                {"confirm_password":_("Password do not match.")}
            )
        return data

    class Meta:
        model = get_user_model()
        fields = ["phone", "password", "confirm_password"]
        extra_kwargs = {
            "phone": {
                "required": True,
            },
            "password": {"write_only": True},
        }

    def create(self, validated_data):
        validated_data.pop("confirm_password")  # remove it
        user = get_user_model().objects.create(**validated_data)
        return user


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)