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

from ..models.courses import Course

class Student(models.Model):
    id = models.AutoField(
        primary_key=True
    )

    email = models.EmailField(
        null=False,
        db_index=True
    )

    phone = models.CharField(
        null=True,
        max_length=16
    )

    name = models.CharField(
        null=False,
        max_length=32
    )

    surname = models.CharField(
        null=False,
        max_length=32
    )

    course = models.ForeignKey(
        Course,
        on_delete=models.DO_NOTHING,
        null=True
    )

    active = models.BooleanField(
        null=False,
        default=True
    )

    user = models.OneToOneField(
        User, 
        on_delete=models.CASCADE, 
        null=True, 
        blank=True
    )

    def __str__(self):
        return f"{self.surname} {self.name[0]}. => {self.course}"