import os
import settings
import threading
import paramiko
import time
paramiko.util.log_to_file('paramiko.log')

def download(ip, dest):
    print('Downloading from', ip)

    port = 22
    transport = paramiko.Transport((ip, port))
    transport.connect(None, settings.RASPBERRY_USER, settings.RASPBERRY_PASS)

    sftp = paramiko.SFTPClient.from_transport(transport)

    files = sftp.listdir('/3dscan/')

    for f in files:
        source_file = '/3dscan/' + f
        dest_file = dest + f
        print('Grabbing file', source_file)
        sftp.get(source_file, dest_file)
        sftp.remove(source_file)

    if sftp: sftp.close()
    if transport: transport.close()

    print('Finished downloading from', ip)

def download_all_photos(dest):
    if not dest.endswith('/'):
        raise Exception('Destination must end with /')

    if not os.path.exists(dest):
        raise Exception('Destination does not exist')

    print('Downloading all photos to', dest)

    for ip in settings.RASPBERRY_IPS:
        t = threading.Thread(target=download, args=(ip, dest))
        t.start()