#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import os

import utils


def setup(interactive=True):
    dir_path = utils.get_dir(__file__)
    pwd_path = '/etc/pure-ftpd/pureftpd.passwd'
    # Get passwords
    ftpincoming_users = utils.get_conf('FTP_INCOMING_USERS', '').strip(',').split(',')
    if not ftpincoming_users:
        raise Exception('No users specified in the configuration FTP_INCOMING_USERS variable.')
    for user in ftpincoming_users:
        if ':' not in user or user.count(':') > 1:
            raise Exception('Invalid user/pass definition, separator not present or too many detected')
    # Run commands
    cmds = [
        'apt-get install --yes pure-ftpd python3-unidecode',
        dict(line='adduser --disabled-login --gecos "" --shell /bin/false ftp', cond='id ftp', cond_neg=True, cond_skip=True),
        'cp "%s/create_ftp_account.sh" /usr/local/bin' % (dir_path),
        'mkdir -p /home/ftp/storage',
        'mkdir -p /home/ftp/storage/incoming',
        'mkdir -p /home/ftp/storage/hotfolder',
        'chmod -R 775 /home/ftp/storage/incoming',
        'chmod -R 775 /home/ftp/storage/hotfolder',
        # Config
        'echo "no" > /etc/pure-ftpd/conf/AllowDotFiles',
        'echo "yes" > /etc/pure-ftpd/conf/CallUploadScript',
        'echo "yes" > /etc/pure-ftpd/conf/ChrootEveryone',
        'echo "yes" > /etc/pure-ftpd/conf/DontResolve',
        'echo "no" > /etc/pure-ftpd/conf/PAMAuthentication',
        # Post upload script
        'cp "%s/on_ftp_upload.py" /home/ftp/on_ftp_upload.py' % dir_path,
        'chown ftp:ftp /home/ftp/on_ftp_upload.py',
        'chmod +x /home/ftp/on_ftp_upload.py',
        'pure-uploadscript -p /home/ftp/.on_upload.pid -B -g $(id -g ftp) -r /home/ftp/on_ftp_upload.py -u $(id -u ftp)',
        'cp "%s/pure-ftpd-common" /etc/default/pure-ftpd-common.tmp' % dir_path,
        'sed "s/UPLOADUID=UID/UPLOADUID=$(id -u ftp)/g" /etc/default/pure-ftpd-common.tmp > /etc/default/pure-ftpd-common.tmp2',
        'mv -f /etc/default/pure-ftpd-common.tmp2 /etc/default/pure-ftpd-common.tmp',
        'sed "s/UPLOADGID=GID/UPLOADGID=$(id -g ftp)/g" /etc/default/pure-ftpd-common.tmp > /etc/default/pure-ftpd-common.tmp2',
        'mv -f /etc/default/pure-ftpd-common.tmp2 /etc/default/pure-ftpd-common',
        'rm -f /etc/default/pure-ftpd-common.tmp',
        'cp "%s/remove_empty_dirs.py" /etc/cron.hourly/remove_empty_dirs.py' % dir_path,
        # Create FTP accounts
        '([ -f "%s" ] || [ -f "%s" ] && cp "%s" "%s") || true' % (pwd_path + '.back', pwd_path, pwd_path, pwd_path + '.back'),
        '([ -f "%s" ] && mv -f "%s" pureftpd.passwd.tmp) || true' % (pwd_path, pwd_path),
    ]
    for ftpuser in ftpincoming_users:
        login, password = ftpuser.split(':')
        cmds.extend([
            'mkdir -p /home/ftp/storage/incoming/%s' % login,
            '"%s/create_ftp_account.sh" %s "%s" /home/ftp/storage/incoming/%s' % (dir_path, login, password, login),
        ])
    cmds.extend([
        'chmod -R 775 /home/ftp/storage/incoming',
        'chown -R ftp:ftp /home/ftp/storage',
        'rm -f pureftpd.passwd.tmp',
        'pure-pw mkdb',
        'ln -sfn /etc/pure-ftpd/conf/PureDB /etc/pure-ftpd/auth/50puredb',
        '/etc/init.d/pure-ftpd force-reload',
    ])

    try:
        utils.run_commands(cmds)
    except Exception:
        raise
    finally:
        # Restore password conf if required
        if os.path.exists('pureftpd.passwd.tmp'):
            os.rename('pureftpd.passwd.tmp', pwd_path)