#!/usr/bin/env python3
from sys import argv
import socket

import exec, mail, config


def main():
    prevMailError = checkPrevError()
    success = executeCommand()
    if prevMailError:
        tryToInform()

    if not prevMailError or not success:
        exit(1)
    else:
        exit(0)


def executeCommand() -> bool:
    if len(argv) < 2:
        return True
    else:
        keys = ['command', 'status', 'stderr', 'stdout']
        code, stdout, stderr = exec.execute(argv[1:])
        values = [str(argv[1:]), str(code), stderr, stdout]

        BODY = ''
        for key, value in zip(keys, values):
            BODY += '=== {} ===\n{}\n'.format(key, value)
        print(BODY)

        if code != 0:
            hostname = socket.gethostname()

            SUBJECT = '{} | {}'.format(hostname, str(argv[1:]))
            mail.sendMailOrWriteToFile(SUBJECT=SUBJECT, BODY=BODY)
        return False


def checkPrevError():
    return config.getErrorFile().exists()


def tryToInform():
    """
    Try to inform user via mail about previous error(s) that could not be sent to him before.
    Maybe this time sending of an email works ;)
    """

    SUBJECT = '{} | Some mails not sent!'.format(socket.gethostname())
    BODY = 'Please check the file {} for mails which could previously not be sent to you!\n' \
           'Note: You may delete the file after reading it ;)'.format(
        config.getErrorFile())
    mail.sendMail(SUBJECT=SUBJECT, BODY=BODY)


if __name__ == '__main__':
    main()