from django.db import models
from GestionLogin.models import Profil
from django.db.models import JSONField
from django.db.models.signals import post_save
from django.dispatch import receiver

class Specialite(models.Model):
    nom = models.CharField(max_length=100)
    dateCreation = models.DateTimeField(auto_now=True)
    codeCouleur = models.CharField(max_length=7, default='#FFFFFF')

    def __str__(self):
        return self.nom

class Enseignant(models.Model):
    nom = models.CharField(max_length=100)
    prenom = models.CharField(max_length=100)
    mail = models.EmailField(unique=True)
    specialites = models.ManyToManyField(Specialite, related_name='enseignants')
    profilAssocie = models.ForeignKey(Profil, on_delete=models.CASCADE, null=True, blank=True)

    def __str__(self):
        return f"{self.nom} {self.prenom}"

class Classe(models.Model):
    nom_ambiance = models.CharField(max_length=255)
    tranche_age = models.JSONField()
    nombre_eleves = models.PositiveIntegerField()
    langue_enseignement = models.CharField(max_length=255)
    annee_scolaire = models.CharField(max_length=9)
    dateCreation = models.DateTimeField(auto_now_add=True)
    enseignants = models.ManyToManyField(Enseignant, related_name='classes')

    def __str__(self):
        return self.nom_ambiance

class Planning(models.Model):
    classe = models.OneToOneField(Classe, on_delete=models.SET_NULL, null=True, blank=True, related_name='planning')
    emploiDuTemps = JSONField(default=list)

    def __str__(self):
        return f'Planning de {self.classe.nom_ambiance}'

@receiver(post_save, sender=Classe)
def create_planning(sender, instance, created, **kwargs): 
    if created and not hasattr(instance, 'planning'): 
        Planning.objects.create(classe=instance)