#!/usr/bin/env python3

'''
Collection of CLI commands for an administrator to use
'''

import logging
import os
import re
import time
from argparse import ArgumentParser
from getpass import getpass
from sys import stderr

from szurubooru import config, db, errors, model
from szurubooru.func import files, images, \
    posts as postfuncs, users as userfuncs


def reset_password(username: str) -> None:
    user = userfuncs.get_user_by_name_or_email(username)

    new_password = getpass('Enter new password for \'%s\': ' % user.name)
    check_password = getpass('Re-enter password: ')

    if check_password != new_password:
        raise errors.ValidationError('Passwords do not match')

    userfuncs.update_user_password(user, new_password)
    db.get_session().commit()
    print('Sucessfully changed password for \'%s\'' % user.name)


def check_audio() -> None:
    post_list = (db.session
                 .query(model.Post)
                 .filter(model.Post.type == model.Post.TYPE_VIDEO)
                 .order_by(model.Post.post_id)
                 .all())

    for post in post_list:
        print('Checking post %d ...' % post.post_id, end='\r')
        content = files.get(postfuncs.get_post_content_path(post))

        has_existing_flag = model.Post.FLAG_SOUND in post.flags
        try:
            has_sound_data = images.Image(content).check_for_sound()
        except errors.ProcessingError:
            print('Post %d caused an error when checking for sound' %
                  post.post_id)

        if has_sound_data and not has_existing_flag:
            print('Post %d has sound data but is not flagged' % post.post_id)
        if not has_sound_data and has_existing_flag:
            print('Post %d has no sound data but is flagged' % post.post_id)


def reset_filenames() -> None:
    regex = re.compile(r'(\d+)_[0-9a-f]{16}\.(\S+)')

    def convert_to_new_filename(old_name: str) -> str:
        matches = regex.match(old_name)
        if not matches:
            return None
        post_id = int(matches.group(1))
        post_ext = matches.group(2)
        return '%d_%s.%s' % \
            (post_id, postfuncs.get_post_security_hash(post_id), post_ext)

    def rename_in_dir(dir: str) -> None:
        for old_path in os.listdir(config.config['data_dir'] + dir):
            new_path = convert_to_new_filename(old_path)
            if not new_path:
                continue
            if old_path != new_path:
                print('%s -> %s' % (dir + old_path, dir + new_path))
                os.rename(config.config['data_dir'] + dir + old_path,
                          config.config['data_dir'] + dir + new_path)

    rename_in_dir('posts/')
    rename_in_dir('generated-thumbnails/')
    rename_in_dir('posts/custom-thumbnails/')


def main() -> None:
    parser_top = ArgumentParser(
        description='Collection of CLI commands for an administrator to use',
        epilog='Look at README.md for more info')
    parser = parser_top.add_mutually_exclusive_group(required=True)
    parser.add_argument('--change-password', metavar='<username>',
                        help='change the password of specified user')
    parser.add_argument('--check-all-audio', action='store_true',
                        help='check the audio flags of all posts, '
                        'noting discrepancies, without modifying posts')
    parser.add_argument('--reset-filenames', action='store_true',
                        help='reset and rename the content and thumbnail '
                        'filenames in case of a lost/changed secret key')
    command = parser_top.parse_args()

    try:
        if command.change_password:
            reset_password(command.change_password)
        elif command.check_all_audio:
            check_audio()
        elif command.reset_filenames:
            reset_filenames()
    except errors.BaseError as e:
        print(e, file=stderr)


if __name__ == '__main__':
    main()