from django.db import models
from django.urls import reverse
from django.contrib.auth.models import User

class Department(models.Model):
    name = models.CharField(max_length=200)

    created = models.DateTimeField(auto_now_add=True)
    modified = models.DateTimeField(auto_now=True)

class Instructor(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    department = models.ForeignKey(Department, on_delete=models.CASCADE)

    created = models.DateTimeField(auto_now_add=True)
    modified = models.DateTimeField(auto_now=True)

    def get_absolute_url(self):
        return reverse('user-detail', kwargs={'pk': self.pk})

    def __str__(self):
        return f'{self.user.first_name} {self.user.last_name}'

class Student(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    student_number = models.IntegerField()
    department = models.ForeignKey(Department, on_delete=models.CASCADE)
    is_clocked_in = models.BooleanField(default=False)

    created = models.DateTimeField(auto_now_add=True)
    modified = models.DateTimeField(auto_now=True)

    def get_absolute_url(self):
        return reverse('user-detail', kwargs={'pk': self.pk})

    def __str__(self):
        return f'{self.student_number}: {self.user.first_name} {self.user.last_name}'