from django.db import models
from django.db.models import UniqueConstraint

from vbv_lernwelt.core.models import User


class CircleCompletion(models.Model):
    # Page can either be a LearningContent or a LearningUnitQuestion for now
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    user = models.ForeignKey(User, on_delete=models.CASCADE)

    # Page can either be a LearningContent or a LearningUnitQuestion for now
    page_key = models.UUIDField()
    page_type = models.CharField(max_length=255, default='', blank=True)
    circle_key = models.UUIDField()
    learning_path_key = models.UUIDField()

    completed = models.BooleanField(default=False)
    json_data = models.JSONField(default=dict, blank=True)

    class Meta:
        constraints = [
            UniqueConstraint(
                fields=['user', 'page_key', ],
                name='unique_user_page_key'
            )
        ]