# The software in this package is distributed under the GNU General
# Public License version 2 (with a special exception described below).
#
# A copy of GNU General Public License (GPL) is included in this distribution,
# in the file COPYING.GPL.
#
# As a special exception, if other files instantiate templates or use macros
# or inline functions from this file, or you compile this file and link it
# with other works to produce a work based on this file, this file
# does not by itself cause the resulting work to be covered
# by the GNU General Public License.
#
# However the source code for this file must still be made available
# in accordance with section (3) of the GNU General Public License.
#
# This exception does not invalidate any other reasons why a work based
# on this file might be covered by the GNU General Public License.
#
# Copyright (c) 2016-2018 Intra2net AG <info@intra2net.com>

"""
Utility to customize email and other test data.

Copyright: Intra2net AG
"""

import os
import re
import logging
log = logging.getLogger('pyi2ncommon.test_data_sync')


def append_email_id_header(data_dir):
    """
    Use to append unique autotest id header to emails.

    :param str data_dir: directory containing the emails
    """
    email_id = 10000
    files = []
    for main_dir, _, files in os.walk(data_dir):
        for i in range(len(files)):
            file_path = os.path.join(main_dir, files[i])
            if i % 100 == 0:
                log.info("%i done\n", i)

            if not re.match(r"^\d+\.$", files[i]):
                continue
            if os.path.getsize(file_path) == 0:
                log.warning("Skipping empty file %s", file_path)
                continue

            log.info("Adding header to email %s", file_path)
            id_line = ""
            message_file = open(file_path, "r")
            for line in message_file:
                if re.match("^Message-Id:", line, re.IGNORECASE):
                    id_line = line
                    message_file.close()
                    break

            readed = open(file_path, "r").read()
            autotest_id_line = "Autotest-Message-ID: <" + str(email_id + i) + ".63D49232CC@gwt-intranator.m.i2n>\r\n"
            if id_line == "":
                final = autotest_id_line + readed
            else:
                final = readed.replace(id_line, autotest_id_line)
                log.info("%s >> %s", id_line, autotest_id_line)
            open(file_path, "w").write(final)
    log.info("%i mails replaced.", len(files))