from django.db import models
from django.conf import settings


class UserLessonLearnHistory(models.Model):

    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.DO_NOTHING)
    course = models.ForeignKey('university.Course', on_delete=models.DO_NOTHING)
    chapter = models.ForeignKey('university.Chapter', on_delete=models.DO_NOTHING)
    lesson = models.ForeignKey('university.Lesson', on_delete=models.DO_NOTHING)
    total_visited_count = models.IntegerField(default=1)
    progress = models.FloatField(default=0)
    first_visited_at = models.DateTimeField(auto_now_add=True)
    last_visited_at = models.DateTimeField(auto_now=True)

    class Meta:
        db_table = 'user_lesson_learn_history'
        unique_together = ('user', 'lesson', 'course', 'chapter')