from django.db import models


class ExamQuestion(models.Model):
    class QuestionType(models.IntegerChoices):
        SINGLE_CHOICE = 0
        MULTIPLE_CHOICE = 1

    variant = models.ForeignKey("labs.ExamVariant", on_delete=models.CASCADE)
    section = models.ForeignKey("labs.ExamSection", on_delete=models.CASCADE)
    score = models.IntegerField(default=0)
    question_type = models.IntegerField(choices=QuestionType.choices, default=QuestionType.SINGLE_CHOICE)
    stem = models.TextField()
    content = models.JSONField(default=list)
    answer = models.JSONField(default=list)
    display_order = models.IntegerField(default=0)
    explanation = models.TextField(null=True, blank=True)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        db_table = "exam_questions"