from django.core.management.validation import max_length

class Event(models.Model):

    """Data model which holds the data related to the scope or the event.

    """

    # Different states the Event can be in

    STATUS_CHOICES = (

        ('active', 'Active'),

        ('inactive', 'Inactive'),

    )

    # Scope of the program, used as a URL prefix

    scope = models.CharField(max_length=255)

    # Name of the program

    name = models.CharField(max_length=255)

    # Event specific i.e version of the event

    turn = models.CharField(max_length=255)

    # Time associated with the program

    timeline = models.OneToOneField(Timeline)

    # Status of the program

    status = models.CharField(max_length=255, choices=STATUS_CHOICES)

class Timeline(models.Model):

    """Timeline of the program

    """

    # Start of registration for the program

    registration_start = models.DateTimeField()

    # End of registration for the program

    registration_end = models.DateTimeField()

    # Start of Call for Papers

    cfp_start = models.DateTimeField()

    # End of Call for Papers

    cfp_end = models.DateTimeField()

    # Accepted papers announced

    accepted_papers_announced = models.DateTimeField()

    # Deadline to submit proceedings paper

    proceedings_paper_deadline = models.DateTimeField()

    # Start of the actual program

    event_start = models.DateTimeField()

    # End of the actual program

    event_end = models.DateTimeField()

    """Base model which is in turn inherited by other models

    which needs to be scoped.

    # Scope of entity in which it is visible

    scope = models.ForeignKey(Scope)