from shara.smb_path_creator import smb_path_creator as spc
from shara.works_with_smb import works_with_smb
from datetime import date
from dotenv import load_dotenv
from email.message import EmailMessage
from email.headerregistry import Address

import smtplib
import os
import socket

# Load variable from .env
dotenv_path = os.path.join(os.path.dirname(__file__), '.env')
if os.path.exists(dotenv_path):
    load_dotenv(dotenv_path=dotenv_path)


SERVER_DOMAIN = os.getenv('SERVER_DOMAIN')
PATH_DIR_LOCAL_BACKUP = os.getenv('PATH_LOCAL_BACKUP')

# SMB_CONFIG
wws = works_with_smb(os.getenv('SMB_USER'), os.getenv('SMB_PASSWORD'),
                     remote_name_machine=os.getenv('SMB_NAME_MACHIME'),
                     ip=os.getenv('SMB_SERVER'),
                     share_name=os.getenv('SMB_SHARA_NAME'),
                     my_hostname=socket.gethostname())

wws.connect()


def get_date():
    return date.today().strftime('%Y%m%d')


def filter_files(list_files, filter):
    return [file for file in list_files if filter in file]


def get_last_backups():
    list_files = sorted(os.listdir(PATH_DIR_LOCAL_BACKUP))
    last_db_backup = filter_files(list_files, '-db-')[-1]
    last_site_backup = filter_files(list_files, '-site-')[-1]
    last_data_backup = filter_files(list_files, '-data-')[-1]
    return [last_db_backup, last_site_backup, last_data_backup]


def del_old_backup(file):
    if '-db-' in file:
        wws.delete_files(spc(SERVER_DOMAIN, '*-db-*'))
    elif '-site-' in file:
        wws.delete_files(spc(SERVER_DOMAIN, '*-site-*'))
    elif '-data-' in file:
        wws.delete_files(spc(SERVER_DOMAIN, '*-data-*'))


def create_message(file):
    msg = EmailMessage()
    msg['Subject'] = F"Copy backup: {file}"

    from_addr = os.getenv('SMTP_USER').split("@")
    msg['From'] = Address("Program: open_kbsu", from_addr[0], from_addr[1])

    to_addr = os.getenv("ADDRESS_TO").split("@")
    msg['To'] = Address(os.getenv("NAME"), to_addr[0], to_addr[1])

    msg.set_content(F"Copy backup {file} from {SERVER_DOMAIN}")
    return msg


def send_massage(msg):
    try:
        smtp = smtplib.SMTP_SSL(host=os.getenv(
            "SMTP_SERVER"), port=os.getenv("SMTP_PORT"), timeout=20)
        smtp.login(os.getenv("SMTP_USER"), os.getenv("SMTP_PASSWORD"))
        smtp.send_message(msg)
    except smtplib.SMTPSenderRefused:
        pass
    except smtplib.SMTPAuthenticationError:
        pass


def main():
    wws.create_dir(SERVER_DOMAIN)
    last_backups = get_last_backups()

    for file in filter_files(last_backups, get_date()):
        if file not in wws.get_listfiles(spc(SERVER_DOMAIN)):
            del_old_backup(file)
            wws.copy_files_to_smb(
                spc(PATH_DIR_LOCAL_BACKUP, file), spc(SERVER_DOMAIN, file))
            send_massage(create_message(file))

    wws.close()


if __name__ == "__main__":
    main()