# -*- coding: utf-8 -*-

from django.db import models


class Project(models.Model):
    """ Model representing a citavi project. """
    name = models.CharField(max_length=255)
    description = models.TextField()
    associated_filename = models.CharField(max_length=255, blank=True, null=True)

    def __unicode__(self):
        repr = self.name
        if self.associated_filename:
            repr += " (" + self.associated_filename + ")"
        else:
            repr += " (empty)"
        return repr


class PersonGlobalIdentity(models.Model):
    """ Model representing a global person identity in django. Can be used to link any foreign identity to it. """
    type = models.CharField(max_length=255)
    # TODO: Extend this for further stuff - maybe vivo external  url or something?

    def __unicode__(self):
        repr = "<PersonGlobalIdentity ID=" + str(self.id) + ", type=" + self.type + ">"
        return repr


class CitaviProjectIdentity(models.Model):
    """ Model representing an identity from a citavi project. """
    global_identity = models.ForeignKey(PersonGlobalIdentity, blank=True, null=True)
    project = models.ForeignKey(Project, blank=False, null=False)
    citavi_uuid = models.CharField(max_length=255, blank=False, null=False)
    preferred = models.BooleanField()

    def __unicode__(self):
        repr = "<CitaviProjectIdentity project=" + str(self.project) + ", citavi_uuid=" + self.citavi_uuid + ", global_identity=" + str(self.global_identity) + ", preferred=" + str(self.preferred) + ">"
        return repr