from django.contrib.auth import get_user_model
from rest_framework import serializers

User = get_user_model()

class TenantUserListSerializer(serializers.ModelSerializer):
    class Meta:
        model = User
        fields = ["id", "username", "email", "first_name", "last_name", "is_active"]


class TenantUserCreateSerializer(serializers.Serializer):
    username = serializers.CharField(max_length=150)
    email = serializers.EmailField()
    first_name = serializers.CharField(max_length=150, required=False, allow_blank=True)
    last_name = serializers.CharField(max_length=150, required=False, allow_blank=True)
    password = serializers.CharField(required=False, allow_blank=True, write_only=True)

    def validate_username(self, value):
        if User.objects.filter(username=value).exists():
            raise serializers.ValidationError("Username already exists.")
        return value

    def validate_email(self, value):
        if User.objects.filter(email=value).exists():
            raise serializers.ValidationError("Email already exists.")
        return value