# -*- coding: utf-8 -*-

#   This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
#     Copyright (C) 2019 OzzieIsaacs, pwr
#
#   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/>.

import sys
import os
from collections import namedtuple
from sqlalchemy import __version__ as sql_version

sqlalchemy_version2 = ([int(x) for x in sql_version.split('.')] >= [2, 0, 0])

# if installed via pip this variable is set to true (empty file with name .HOMEDIR present)
HOME_CONFIG = os.path.isfile(os.path.join(os.path.dirname(os.path.abspath(__file__)), '.HOMEDIR'))

# In executables updater is not available, so variable is set to False there
UPDATER_AVAILABLE = True

# Base dir is parent of current file, necessary if called from different folder
BASE_DIR            = os.path.abspath(os.path.join(os.path.dirname(os.path.abspath(__file__)), os.pardir))
STATIC_DIR          = os.path.join(BASE_DIR, 'cps', 'static')
TEMPLATES_DIR       = os.path.join(BASE_DIR, 'cps', 'templates')
TRANSLATIONS_DIR    = os.path.join(BASE_DIR, 'cps', 'translations')

if HOME_CONFIG:
    home_dir = os.path.join(os.path.expanduser("~"), ".calibre-web")
    if not os.path.exists(home_dir):
        os.makedirs(home_dir)
    CONFIG_DIR = os.environ.get('CALIBRE_DBPATH', home_dir)
else:
    CONFIG_DIR = os.environ.get('CALIBRE_DBPATH', BASE_DIR)


ROLE_USER               = 0 << 0
ROLE_ADMIN              = 1 << 0
ROLE_DOWNLOAD           = 1 << 1
ROLE_UPLOAD             = 1 << 2
ROLE_EDIT               = 1 << 3
ROLE_PASSWD             = 1 << 4
ROLE_ANONYMOUS          = 1 << 5
ROLE_EDIT_SHELFS        = 1 << 6
ROLE_DELETE_BOOKS       = 1 << 7
ROLE_VIEWER             = 1 << 8

ALL_ROLES = {
                "admin_role": ROLE_ADMIN,
                "download_role": ROLE_DOWNLOAD,
                "upload_role": ROLE_UPLOAD,
                "edit_role": ROLE_EDIT,
                "passwd_role": ROLE_PASSWD,
                "edit_shelf_role": ROLE_EDIT_SHELFS,
                "delete_role": ROLE_DELETE_BOOKS,
                "viewer_role": ROLE_VIEWER,
            }

DETAIL_RANDOM           = 1 <<  0
SIDEBAR_LANGUAGE        = 1 <<  1
SIDEBAR_SERIES          = 1 <<  2
SIDEBAR_CATEGORY        = 1 <<  3
SIDEBAR_HOT             = 1 <<  4
SIDEBAR_RANDOM          = 1 <<  5
SIDEBAR_AUTHOR          = 1 <<  6
SIDEBAR_BEST_RATED      = 1 <<  7
SIDEBAR_READ_AND_UNREAD = 1 <<  8
SIDEBAR_RECENT          = 1 <<  9
SIDEBAR_SORTED          = 1 << 10
MATURE_CONTENT          = 1 << 11
SIDEBAR_PUBLISHER       = 1 << 12
SIDEBAR_RATING          = 1 << 13
SIDEBAR_FORMAT          = 1 << 14
SIDEBAR_ARCHIVED        = 1 << 15
SIDEBAR_DOWNLOAD        = 1 << 16
SIDEBAR_LIST            = 1 << 17

sidebar_settings = {
                "detail_random": DETAIL_RANDOM,
                "sidebar_language": SIDEBAR_LANGUAGE,
                "sidebar_series": SIDEBAR_SERIES,
                "sidebar_category": SIDEBAR_CATEGORY,
                "sidebar_random": SIDEBAR_RANDOM,
                "sidebar_author": SIDEBAR_AUTHOR,
                "sidebar_best_rated": SIDEBAR_BEST_RATED,
                "sidebar_read_and_unread": SIDEBAR_READ_AND_UNREAD,
                "sidebar_recent": SIDEBAR_RECENT,
                "sidebar_sorted": SIDEBAR_SORTED,
                "sidebar_publisher": SIDEBAR_PUBLISHER,
                "sidebar_rating": SIDEBAR_RATING,
                "sidebar_format": SIDEBAR_FORMAT,
                "sidebar_archived": SIDEBAR_ARCHIVED,
                "sidebar_download": SIDEBAR_DOWNLOAD,
                "sidebar_list": SIDEBAR_LIST,
            }


ADMIN_USER_ROLES        = sum(r for r in ALL_ROLES.values()) & ~ROLE_ANONYMOUS
ADMIN_USER_SIDEBAR      = (SIDEBAR_LIST << 1) - 1

UPDATE_STABLE       = 0 << 0
AUTO_UPDATE_STABLE  = 1 << 0
UPDATE_NIGHTLY      = 1 << 1
AUTO_UPDATE_NIGHTLY = 1 << 2

LOGIN_STANDARD      = 0
LOGIN_LDAP          = 1
LOGIN_OAUTH         = 2

LDAP_AUTH_ANONYMOUS      = 0
LDAP_AUTH_UNAUTHENTICATE = 1
LDAP_AUTH_SIMPLE         = 0

DEFAULT_MAIL_SERVER = "mail.example.org"

DEFAULT_PASSWORD    = "admin123"  # nosec
DEFAULT_PORT        = 8083
env_CALIBRE_PORT = os.environ.get("CALIBRE_PORT", DEFAULT_PORT)
try:
    DEFAULT_PORT = int(env_CALIBRE_PORT)
except ValueError:
    print('Environment variable CALIBRE_PORT has invalid value (%s), faling back to default (8083)' % env_CALIBRE_PORT)
del env_CALIBRE_PORT


EXTENSIONS_AUDIO = {'mp3', 'mp4', 'ogg', 'opus', 'wav', 'flac', 'm4a', 'm4b'}
EXTENSIONS_CONVERT_FROM = ['pdf', 'epub', 'mobi', 'azw3', 'docx', 'rtf', 'fb2', 'lit', 'lrf',
                           'txt', 'htmlz', 'rtf', 'odt', 'cbz', 'cbr']
EXTENSIONS_CONVERT_TO = ['pdf', 'epub', 'mobi', 'azw3', 'docx', 'rtf', 'fb2',
                         'lit', 'lrf', 'txt', 'htmlz', 'rtf', 'odt']
EXTENSIONS_UPLOAD = {'txt', 'pdf', 'epub', 'kepub', 'mobi', 'azw', 'azw3', 'cbr', 'cbz', 'cbt', 'djvu',
                     'prc', 'doc', 'docx', 'fb2', 'html', 'rtf', 'lit', 'odt', 'mp3', 'mp4', 'ogg',
                     'opus', 'wav', 'flac', 'm4a', 'm4b'}


def has_flag(value, bit_flag):
    return bit_flag == (bit_flag & (value or 0))

def selected_roles(dictionary):
    return sum(v for k, v in ALL_ROLES.items() if k in dictionary)


# :rtype: BookMeta
BookMeta = namedtuple('BookMeta', 'file_path, extension, title, author, cover, description, tags, series, '
                                  'series_id, languages, publisher, pubdate, identifiers')

STABLE_VERSION = {'version': '0.6.19 Beta'}

NIGHTLY_VERSION = dict()
NIGHTLY_VERSION[0] = '$Format:%H$'
NIGHTLY_VERSION[1] = '$Format:%cI$'
# NIGHTLY_VERSION[0] = 'bb7d2c6273ae4560e83950d36d64533343623a57'
# NIGHTLY_VERSION[1] = '2018-09-09T10:13:08+02:00'


# clean-up the module namespace
del sys, os, namedtuple