from django.db import models


class Volunteer(models.Model):
    realname = models.CharField(max_length=200, null=True)
    email = models.CharField(max_length=200, null=True)
    username = models.CharField(max_length=200, null=True)

    class Meta:
        abstract = True

class Project(Volunteer):
    name = models.CharField(max_length=200)
    start = models.DateField('start date')

    pid = models.IntegerField(null=True, blank=True) # automaticly generated

    def save(self,*args,**kwargs):
        # is there a way to call super().save() only once?
        super().save(*args,*kwargs)
        self.pid = 10000 + self.pk
        super().save(*args,*kwargs)

    def __str__(self):
        return self.name

class HonoraryCertificate(Volunteer):
    request_url = models.CharField(max_length=2000)
    number = models.IntegerField(null = True)

    def __str__(self):
        return "Certificate for " + self.realname

#abstract class for Library, IFG, ...
class Grant(Volunteer):
    cost = models.CharField(max_length=10)
    notes = models.CharField(max_length=500)

    class Meta:
        abstract = True

# same model is used for Library, ELitStip and Software!
class Library(Grant):
    TYPE_CHOICES = [('LIB', 'Bibliotheksstipendium'),
               ('ELIT', 'eLiteraturstipendium'),
               ('SOFT', 'Softwarestipendium')]
    type = models.CharField(
        max_length=4,
        choices=TYPE_CHOICES,
        default='LIB',
    )
    library = models.CharField(max_length=200)
    duration = models.CharField(max_length=100)

    def __str__(self):
        return self.library

class IFG(Grant):
    url = models.CharField(max_length=2000)

    def __str__(self):
        return "IFG-Anfrage von " + self.realname