from django.db.models.signals import post_save

from django.dispatch import receiver

from django.contrib.auth import get_user_model

from django.conf import settings

import requests, json

@receiver(post_save)

def reference_created_renkan(sender, instance, created, **kwargs):

    from renkanmanager.models import Renkan

        token_response = requests.post(

            settings.MTDC_CLIENT_CREDENTIALS_TOKEN_URL+"?grant_type=client_credentials",

            data = {},

            headers = {

                "Authorization": "Basic %s" % settings.MTDC_AUTH_CODE

            }          

        )

        if token_response.status_code == 200:

            token = json.loads(token_response.text)['access_token']

            post_data = json.dumps({

                "userId": instance.creator.id,

                "title": instance.title

            })

            reference_response = requests.post(

                settings.MTDC_REFERENCE_RESOURCE_BASE_URL+str(instance.renkan_guid),

                data = post_data,

                headers = {

                    "Authorization": "Bearer %s" % token

                }                             

            )

@receiver(post_save)

def reference_modified_title(sender, instance, created, **kwargs):

    from renkanmanager.models import Renkan, Revision

    if created and sender == Revision:

        try:

            referenced_renkan = Renkan.objects.get(renkan_guid = instance.revision_guid)

        except Renkan.DoesNotExist:

            return

        if referenced_renkan.revision_count > 1:

            # This means the revision isn't the first of the Renkan and therefore we shouldn't do anything

            token_response = requests.post(

                settings.MTDC_CLIENT_CREDENTIALS_TOKEN_URL+"?grant_type=client_credentials",

                data = {},

                headers = {

                    "Authorization": "Basic %s" % settings.MTDC_AUTH_CODE

                }                             

            )

            if token_response.status_code == 200:

                token = json.loads(token_response.text)['access_token']

                put_data = json.dumps({

                    "userId": referenced_renkan.creator.id,

                    "title": referenced_renkan.title

                })

                reference_response = requests.post(

                    settings.MTDC_REFERENCE_RESOURCE_BASE_URL+str(instance.renkan_guid),

                    data = put_data,

                    headers = {

                        "Authorization": "Bearer %s" % token

                    }