# Copyright 2018 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# [START docs_quickstart]
from __future__ import print_function

import os.path
import requests, json
from requests.auth import HTTPBasicAuth
from httplib2 import Http

from google.auth.transport.requests import Request
from google.oauth2.credentials import Credentials
from google_auth_oauthlib.flow import InstalledAppFlow
from googleapiclient.discovery import build
from googleapiclient.errors import HttpError
from googleapiclient.http import MediaIoBaseDownload


# If modifying these scopes, delete the file token.json.

class Connection:
    def __init__(self) -> None:
        self.SCOPES = ['https://www.googleapis.com/auth/photoslibrary']
        self.creds = None
        with open('nextcloud.json') as nextcloud:
            data = json.load(nextcloud)
            self.nextcloud_user = data['user']
            self.nextcloud_pass = data['pass']
            self.nextcloud_url = data['url']
            self.nextcloud_destination_folder = data['destination_folder']
        self.google_connect()

    def google_connect(self):
        # The file token.json stores the user's access and refresh tokens, and is
        # created automatically when the authorization flow completes for the first
        # time.
        if os.path.exists('token.json'):
            self.creds = Credentials.from_authorized_user_file('token.json', self.SCOPES)
        # If there are no (valid) credentials available, let the user log in.
        if not self.creds or not self.creds.valid:
            if self.creds and self.creds.expired and self.creds.refresh_token:
                self.creds.refresh(Request())
            else:
                flow = InstalledAppFlow.from_client_secrets_file(
                    'credentials.json', self.SCOPES)
                self.creds = flow.run_local_server(port=0)
            # Save the credentials for the next run
            with open('token.json', 'w') as token:
                token.write(self.creds.to_json())


def download(connection, next_page=None):

    try:
        service = build('photoslibrary', 'v1', credentials=connection.creds, static_discovery=False)

        results = service.mediaItems().list(pageSize=20, pageToken=next_page).execute()

        items = results.get('mediaItems', [])
        next_page = results.get('nextPageToken')

        for item in items:
            print(f"{item['filename']} {item['mimeType']}")
            url = connection.nextcloud_url + '/remote.php/dav/files/' + connection.nextcloud_user + '/' + connection.nextcloud_destination_folder + '/' + item['filename']
            if requests.get(url, auth=HTTPBasicAuth(connection.nextcloud_user, connection.nextcloud_pass)).status_code != 200:
                if "video" in item['mimeType']:
                    requests.put(url, auth=HTTPBasicAuth(connection.nextcloud_user, connection.nextcloud_pass), data=requests.get(item['baseUrl']+'=dv').content)
                else:
                    requests.put(url, auth=HTTPBasicAuth(connection.nextcloud_user, connection.nextcloud_pass), data=requests.get(item['baseUrl']+'=d').content)

        return next_page


    except HttpError as err:
        print(err)


if __name__ == '__main__':
    connection = Connection()
    next_page = download(connection)
    while next_page != None:
        next_page = download(connection, next_page)
    print('done')
# [END docs_quickstart]