#!/usr/bin/env python3.7
#
# Copyright (C) 2016,2017 The University of Sheffield, UK
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# SPDX-License-Identifier: GPL-3.0-or-later
""" Tool for mining the cdnjs git repository"""

import getopt
import logging
import sys
import os

from ExtensionCrawler.config import (const_log_format, const_basedir)
from ExtensionCrawler.cdnjs_git import (pull_and_update_db, update_db_all_libs,
                                        update_db_from_listfile)


def helpmsg():
    """Print help message."""
    print("cdnjs-git-miner [OPTION]")
    print(
        "    -i               initialize/update database with all libraries in the repository"
    )
    print("    -u               update: pull repository and update database")
    print(
        "    -l <PATHFILE>    read list of libraries to update from file (recusively)"
    )
    print("    -n <TASKID>      process chunk n where n in [1,N]")
    print("    -N <MAXTASKID>   ")
    print("    -v               verbose")
    print(
        "    -c               print csv format to stdout instead of writing to database"
    )
    print("    -a=<DIR>         archive directory")
    print("    -h               print this help text")


def main(argv):
    """Main function of the extension crawler."""
    basedir = const_basedir()
    verbose = False
    initialize = False
    update = False
    taskid = 1
    listfile = None
    maxtaskid = 1
    csv = False

    try:
        opts, args = getopt.getopt(argv, "hvicl:ua:p:n:N:", [
            "archive=", "listupdate=", "taskid=", "maxtaskid="
        ])
    except getopt.GetoptError:
        helpmsg()
        sys.exit(2)
    for opt, arg in opts:
        if opt == '-h':
            helpmsg()
            sys.exit()
        elif opt == '-v':
            verbose = True
        elif opt in ("-l", "--listupdate"):
            listfile = arg
        elif opt in ("-a", "--archive"):
            basedir = arg
        elif opt == '-i':
            initialize = True
        elif opt == '-u':
            update = True
        elif opt == '-c':
            csv = True
        elif opt in ("-n", "--taskid"):
            taskid = int(arg)
        elif opt in ("-N", "--maxtaskid"):
            maxtaskid = int(arg)

    if verbose:
        loglevel = logging.INFO
    else:
        loglevel = logging.WARNING

    logger = logging.getLogger()
    ch = logging.StreamHandler(sys.stdout)
    ch.setFormatter(logging.Formatter(const_log_format()))
    logger.addHandler(ch)
    logger.setLevel(loglevel)

    cdnjs_git_path = os.path.join(os.path.join(basedir, "filedb"), "cdnjs-git")

    if initialize:
        logging.info("Starting update of all db libs")
        update_db_all_libs(cdnjs_git_path, csv, taskid, maxtaskid)
        logging.info("Finished update of all db libs")
    if update:
        logging.info("Starting update of new db libs")
        pull_and_update_db(cdnjs_git_path, csv)
        logging.info("Finished update of new db libs")
    if listfile is not None:
        logging.info("Starting update from list file")
        update_db_from_listfile(cdnjs_git_path, listfile, csv)
        logging.info("Finished update from list file")

    logging.info("Successfully updated cdnjs table")


if __name__ == "__main__":
    main(sys.argv[1:])