from django.db import models
from .course_model import Course


class Exam(models.Model):
    course = models.ForeignKey(Course, on_delete=models.CASCADE, related_name='exams')
    date = models.DateField()
    name = models.CharField(max_length=200, blank=True)  # e.g., "2022-01-15"
    folder_path = models.CharField(max_length=500, blank=True)  # Path to exam folder in content
    created_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        unique_together = ['course', 'date']
        ordering = ['-date']

    def __str__(self):
        return f"{self.course.name} - {self.date}"