from django.db import models


class Timetable(models.Model):
    name = models.CharField(max_length=64, unique=True, verbose_name="nom")
    url = models.URLField(max_length=255, unique=True, verbose_name="URL")
    slug = models.SlugField(max_length=64, unique=True, default="")

    def __str__(self):
        return self.name


    class Meta:
        verbose_name = "emploi du temps"
        verbose_name_plural = "emplois du temps"


class Group(models.Model):
    name = models.CharField(max_length=255, verbose_name="nom")
    timetable = models.ForeignKey(Timetable, on_delete=models.CASCADE, verbose_name="emploi du temps")

    def __str__(self):
        return self.name


    class Meta:
        verbose_name = "groupe"
        verbose_name_plural = "groupes"
        unique_together = ("name", "timetable",)


class Room(models.Model):
    name = models.CharField(max_length=255, unique=True, verbose_name="nom")

    def __str__(self):
        return self.name


    class Meta:
        verbose_name = "salle"
        verbose_name_plural = "salles"


class Course(models.Model):
    name = models.CharField(max_length=255, verbose_name="nom")
    type_ = models.CharField(name="type", max_length=255, verbose_name="type de cours")
    timetable = models.ForeignKey(Timetable, on_delete=models.CASCADE, verbose_name="emploi du temps")

    groups = models.ManyToManyField(Group, verbose_name="groupes")
    rooms = models.ManyToManyField(Room, verbose_name="salles")

    begin = models.DateTimeField(verbose_name="début du cours")
    end = models.DateTimeField(verbose_name="fin du cours")

    def __str__(self):
        return self.name


    class Meta:
        verbose_name = "cours"
        verbose_name_plural = "cours"