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

from Citavi import ProjectManager
from Django import PersonIdentityManager


class PersonMapper():

    def __init__(self):
        """ Initializes ProjectManager and PersonIdentityManager. """
        self._citavi_project_manager = ProjectManager()
        self._person_identity_manager = PersonIdentityManager()

    def __del__(self):
        """ Destroys ProjectManager and PersonIdentityManager.  """
        del self._citavi_project_manager
        del self._person_identity_manager

    def get_unmapped_identities(self, project):
        """ Returns a uuid->person dict for all unmapped persons within a project. """
        citavi_persons = self._citavi_project_manager.get_persons_from_project(project.id)
        mapped_persons = self._person_identity_manager.get_mapped_identities_for_project(project)
        # Prepare citavi_persons into a uuid->person dict, then eliminate mapped ones. This is ugly and a little slow.
        citavi_uuid_dict = {}
        for person in citavi_persons:
            citavi_uuid_dict[person.ID] = person
        if len(mapped_persons) == 0:
            return citavi_uuid_dict
        for person in mapped_persons:
            if person.citavi_uuid in citavi_uuid_dict:
                del citavi_uuid_dict[person.citavi_uuid]
        return citavi_uuid_dict

    def get_mapped_identities(self, project):
        """ Returns a uuid->person dict for all mapped persons within a project. """
        mapped_persons = self._person_identity_manager.get_mapped_identities_for_project(project)
        mapped_uuid_dict = {}
        for person in mapped_persons:
            mapped_uuid_dict[person.citavi_uuid] = person
        return mapped_uuid_dict

    def create_new_identity(self, project, person):
        """ Creates a new identity for a given person. """
        return self._person_identity_manager.create_identity(project, person.ID)

    def get_person_by_uuid(self, project, uuid):
        """ Returns a person from a citavi project by uuid. """
        return self._citavi_project_manager.get_person_by_uuid(project.id, uuid)