from typing import List

from rest_framework import serializers

from vbv_lernwelt.competence.models import PerformanceCriteria
from vbv_lernwelt.core.serializers import UserSerializer
from vbv_lernwelt.self_evaluation_feedback.models import SelfEvaluationFeedback


class SelfEvaluationFeedbackSerializer(serializers.ModelSerializer):
    criteria = serializers.SerializerMethodField()
    feedback_requester_user = UserSerializer(read_only=True)
    feedback_provider_user = UserSerializer(read_only=True)
    learning_unit_id = serializers.PrimaryKeyRelatedField(
        read_only=True, source="learning_unit"
    )

    class Meta:
        model = SelfEvaluationFeedback
        fields = [
            "id",
            "learning_unit_id",
            "feedback_submitted",
            "feedback_requester_user",
            "feedback_provider_user",
            "criteria",
        ]

    def get_criteria(self, obj):
        performance_criteria: List[
            PerformanceCriteria
        ] = obj.learning_unit.performancecriteria_set.all()

        return [
            {
                "id": criteria.id,
                "title": criteria.title,
            }
            for criteria in performance_criteria
        ]