#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import logging
import os
import shutil
import sys
import unicodedata
# command line
# pure-uploadscript -p /home/ftp/.on_ftp_upload.pid -B -g 1001 -r /home/ftp/on_ftp_upload.py -u 1001

BASE_DIR = '/home/ftp/storage/'
INCOMING_DIR = BASE_DIR + 'incoming/'
WWW_DIR = BASE_DIR + 'www/'
ALLOWED_CHARS = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_-.'

LOG_FILE = '/home/ftp/on_ftp_upload.log'
LOG_LEVEL = 'INFO'


def clean_name(name):
    # strip accents and replace non allowed characters
    return ''.join((c if c in ALLOWED_CHARS else '_') for c in unicodedata.normalize('NFD', name) if unicodedata.category(c) != 'Mn')


if __name__ == '__main__':
    # setup logging
    logging.basicConfig(
        filename=LOG_FILE,
        format='%(asctime)s %(name)-12s %(levelname)-8s %(message)s',
        level=getattr(logging, LOG_LEVEL),
    )

    try:
        logging.debug('Starting script')

        if len(sys.argv) < 2:
            logging.info('Not enough arguments')
            sys.exit(1)

        src_path = sys.argv[1]
        if not src_path.startswith(BASE_DIR):
            logging.info('File %s will not be moved because it is not in base dir', src_path)
            sys.exit(0)

        # remove special characters
        name = os.path.basename(src_path)
        new_name = clean_name(name)
        if name != new_name:
            new_path = os.path.join(os.path.dirname(src_path), new_name)
            os.rename(src_path, new_path)
            logging.info('File %s has been renamed to %s', src_path, new_path)
            src_path = new_path

        # move file
        if not src_path.startswith(INCOMING_DIR):
            logging.info('File %s will not be moved because it is not in the incoming dir', src_path)
            sys.exit(0)

        dest_path = src_path.replace(INCOMING_DIR, WWW_DIR)
        if not os.path.exists(os.path.dirname(dest_path)):
            os.system('mkdir -p -m 775 "%s"' % os.path.dirname(dest_path))

        shutil.move(src_path, dest_path)
        logging.info('File moved %s', src_path)
    except Exception as e:
        logging.error('Failed to move file %s. Error: %s', src_path, e)
        sys.exit(1)
    else:
        sys.exit(0)