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

from apps.account.serializers import UserProfileSerializer


User = get_user_model()


class ProfessorListSerializer(serializers.ModelSerializer):
    course_count = serializers.IntegerField(read_only=True)
    lesson_count = serializers.IntegerField(read_only=True)

    class Meta:
        model = User
        fields = ['id', 'slug', 'fullname', 'experience_years', 'course_count', 'lesson_count']


class ProfessorDetailSerializer(UserProfileSerializer):
    course_count = serializers.IntegerField(read_only=True)
    lesson_count = serializers.IntegerField(read_only=True)
    experience_years = serializers.IntegerField(read_only=True)
    slug = serializers.CharField(read_only=True)

    class Meta(UserProfileSerializer.Meta):
        fields = UserProfileSerializer.Meta.fields + ['slug', 'experience_years', 'course_count', 'lesson_count']
        read_only_fields = list(set(UserProfileSerializer.Meta.read_only_fields + ['slug', 'experience_years', 'course_count', 'lesson_count']))