from django.db import models


class Subject(models.Model):
    types = (
        ('Лекция', 'Лекция'),
        ('Практика', 'Практика'),
        ('Лабораторная', 'Лабораторная'),
        ('Зачет', 'Зачет'),
        ('Экзамен', 'Экзамен'),
    )
    name = models.CharField('Предмет', max_length=50)
    type = models.CharField('Тип занятия', max_length=50, choices=types)

    def __str__(self):
        return self.name + ' (' + self.type.lower() + ')'


class Teacher(models.Model):
    secondName = models.CharField('Фамилия', max_length=50)
    firstName = models.CharField('Имя', max_length=50)
    thirdName = models.CharField('Отчество', max_length=50)
    subject = models.ManyToManyField(Subject,
                                     verbose_name='Предмет')

    def __str__(self):
        return self.secondName + ' ' + self.firstName + ' ' + self.thirdName


class Timetable(models.Model):
    day = models.DateField('Дата')
    subject = models.ForeignKey(Subject,
                                verbose_name='Предмет')
    teacher = models.ForeignKey(Teacher,
                                verbose_name='Преподаватель')
    classRoom = models.IntegerField('Аудитория')
    lessonStart = models.TimeField('Начало занятия')
    lessonEnd = models.TimeField('Конец занятия')

    def __str__(self):
        return str(self.subject + ' ' + self.classRoom)