#!/usr/bin/env python2
# -*- coding: utf-8 -*-

# SàT: a XMPP client
# Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.org)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

try:
    from xdg import BaseDirectory
    from os.path import expanduser, realpath
except ImportError:
    BaseDirectory = None


class Const(object):

    ## Application ##
    APP_NAME = u'Salut à Toi'
    APP_NAME_SHORT = u'SàT'
    APP_NAME_FILE = u'sat'
    APP_NAME_FULL = u'%s (%s)' % (APP_NAME_SHORT, APP_NAME)
    APP_VERSION = u'0.7.0D'  # Please add 'D' at the end for dev versions
    APP_URL = u'http://salut-a-toi.org'


    # Protocol
    XMPP_C2S_PORT = 5222
    XMPP_KEEP_ALIFE = 180
    XMPP_MAX_RETRIES = 2


    ## Parameters ##
    NO_SECURITY_LIMIT = -1
    INDIVIDUAL = "individual"
    GENERAL = "general"
    # General parameters
    HISTORY_LIMIT = "History"
    SHOW_OFFLINE_CONTACTS = "Offline contacts"
    SHOW_EMPTY_GROUPS = "Empty groups"
    # Parameters related to connection
    FORCE_SERVER_PARAM = "Force server"
    FORCE_PORT_PARAM = "Force port"
    # Parameters related to encryption
    PROFILE_PASS_PATH = ('General', 'Password')
    MEMORY_CRYPTO_NAMESPACE = 'crypto'  # for the private persistent binary dict
    MEMORY_CRYPTO_KEY = 'personal_key'
    # Parameters for static blog pages
    STATIC_BLOG_KEY = "Blog page"
    STATIC_BLOG_PARAM_TITLE = "Title"
    STATIC_BLOG_PARAM_BANNER = "Banner"
    STATIC_BLOG_PARAM_KEYWORDS = "Keywords"
    STATIC_BLOG_PARAM_DESCRIPTION = "Description"


    ## Menus ##
    MENU_GLOBAL = "GLOBAL"
    MENU_ROOM = "ROOM"
    MENU_SINGLE = "SINGLE"
    MENU_JID_CONTEXT = "JID_CONTEXT"
    MENU_ROSTER_JID_CONTEXT = "ROSTER_JID_CONTEXT"
    MENU_ROSTER_GROUP_CONTEXT = "MENU_ROSTER_GROUP_CONTEXT"
    MENU_ROOM_OCCUPANT_CONTEXT = "MENU_ROOM_OCCUPANT_CONTEXT"


    ## Profile and entities ##
    PROF_KEY_NONE = '@NONE@'
    PROF_KEY_DEFAULT = '@DEFAULT@'
    PROF_KEY_ALL = '@ALL@'
    ENTITY_ALL = '@ALL@'
    ENTITY_ALL_RESOURCES = '@ALL_RESOURCES@'
    ENTITY_MAIN_RESOURCE = '@MAIN_RESOURCE@'
    ENTITY_CAP_HASH = 'CAP_HASH'
    ENTITY_TYPE = 'TYPE'


    ## Roster jids selection ##
    PUBLIC = 'PUBLIC'
    ALL = 'ALL' # ALL means all known contacts, while PUBLIC means everybody, known or not
    GROUP = 'GROUP'
    JID = 'JID'


    ## Messages ##
    MESS_TYPE_INFO = 'info'
    MESS_TYPE_CHAT = 'chat'
    MESS_TYPE_ERROR = 'error'
    MESS_TYPE_GROUPCHAT = 'groupchat'
    MESS_TYPE_HEADLINE = 'headline'
    MESS_TYPE_NORMAL = 'normal'
    MESS_TYPE_AUTO = 'auto'  # magic value to let the backend guess the type
    MESS_TYPE_STANDARD = (MESS_TYPE_CHAT, MESS_TYPE_ERROR, MESS_TYPE_GROUPCHAT, MESS_TYPE_HEADLINE, MESS_TYPE_NORMAL)
    MESS_TYPE_ALL = MESS_TYPE_STANDARD + (MESS_TYPE_INFO, MESS_TYPE_AUTO)

    MESS_EXTRA_INFO = "info_type"


    ## Presence ##
    PRESENCE_UNAVAILABLE = 'unavailable'
    PRESENCE_SHOW_AWAY = 'away'
    PRESENCE_SHOW_CHAT = 'chat'
    PRESENCE_SHOW_DND = 'dnd'
    PRESENCE_SHOW_XA = 'xa'
    PRESENCE_SHOW = 'show'
    PRESENCE_STATUSES = 'statuses'
    PRESENCE_STATUSES_DEFAULT = 'default'
    PRESENCE_PRIORITY = 'priority'


    ## Common namespaces ##
    NS_XML = 'http://www.w3.org/XML/1998/namespace'
    NS_CLIENT = 'jabber:client'
    NS_FORWARD = 'urn:xmpp:forward:0'
    NS_DELAY = 'urn:xmpp:delay'
    NS_XHTML = 'http://www.w3.org/1999/xhtml'


    ## Configuration ##
    if BaseDirectory:  # skipped when xdg module is not available (should not happen in backend)

        ## Configuration ##
        DEFAULT_CONFIG = {
            'media_dir': '/usr/share/' + APP_NAME_FILE + '/media',
            'local_dir': BaseDirectory.save_data_path(APP_NAME_FILE),
            'pid_dir': '%(local_dir)s',
            'log_dir': '%(local_dir)s',
        }

        # List of the configuration filenames sorted by ascending priority
        CONFIG_FILES = [realpath(expanduser(path) + APP_NAME_FILE + '.conf') for path in
                        ['/etc/', '~/', '~/.', '', '.'] +
                        ['%s/' % path for path in list(BaseDirectory.load_config_paths(APP_NAME_FILE))]
                       ]


    ## Plugins ##

    # Types
    PLUG_TYPE_XEP = "XEP"
    PLUG_TYPE_MISC = "MISC"
    PLUG_TYPE_EXP = "EXP"
    PLUG_TYPE_SEC = "SEC"
    PLUG_TYPE_SYNTAXE = "SYNTAXE"
    PLUG_TYPE_BLOG = "BLOG"


    # names of widely used plugins
    TEXT_CMDS = 'TEXT-COMMANDS'

    # PubSub event categories
    PS_PEP = "PEP"
    PS_MICROBLOG = "MICROBLOG"

    # PubSub
    PS_PUBLISH = "publish"
    PS_RETRACT = "retract" # used for items
    PS_DELETE = "delete" #used for nodes
    PS_ITEM = "item"
    PS_ITEMS = "items" # Can contain publish and retract items
    PS_EVENTS = (PS_ITEMS, PS_DELETE)


    ## XMLUI ##
    XMLUI_WINDOW = 'window'
    XMLUI_POPUP = 'popup'
    XMLUI_FORM = 'form'
    XMLUI_PARAM = 'param'
    XMLUI_DIALOG = 'dialog'
    XMLUI_DIALOG_CONFIRM = "confirm"
    XMLUI_DIALOG_MESSAGE = "message"
    XMLUI_DIALOG_NOTE = "note"
    XMLUI_DIALOG_FILE = "file"
    XMLUI_DATA_ANSWER = "answer"
    XMLUI_DATA_CANCELLED = "cancelled"
    XMLUI_DATA_TYPE = "type"
    XMLUI_DATA_MESS = "message"
    XMLUI_DATA_LVL = "level"
    XMLUI_DATA_LVL_INFO = "info"
    XMLUI_DATA_LVL_WARNING = "warning"
    XMLUI_DATA_LVL_ERROR = "error"
    XMLUI_DATA_LVL_DEFAULT = XMLUI_DATA_LVL_INFO
    XMLUI_DATA_BTNS_SET = "buttons_set"
    XMLUI_DATA_BTNS_SET_OKCANCEL = "ok/cancel"
    XMLUI_DATA_BTNS_SET_YESNO = "yes/no"
    XMLUI_DATA_BTNS_SET_DEFAULT = XMLUI_DATA_BTNS_SET_OKCANCEL
    XMLUI_DATA_FILETYPE = 'filetype'
    XMLUI_DATA_FILETYPE_FILE = "file"
    XMLUI_DATA_FILETYPE_DIR = "dir"
    XMLUI_DATA_FILETYPE_DEFAULT = XMLUI_DATA_FILETYPE_FILE


    ## Logging ##
    LOG_LVL_DEBUG = 'DEBUG'
    LOG_LVL_INFO = 'INFO'
    LOG_LVL_WARNING = 'WARNING'
    LOG_LVL_ERROR = 'ERROR'
    LOG_LVL_CRITICAL = 'CRITICAL'
    LOG_LEVELS = (LOG_LVL_DEBUG, LOG_LVL_INFO, LOG_LVL_WARNING, LOG_LVL_ERROR, LOG_LVL_CRITICAL)
    LOG_BACKEND_STANDARD = 'standard'
    LOG_BACKEND_TWISTED = 'twisted'
    LOG_BACKEND_BASIC = 'basic'
    LOG_BACKEND_CUSTOM = 'custom'
    LOG_BASE_LOGGER = 'root'
    LOG_TWISTED_LOGGER = 'twisted'
    LOG_OPT_SECTION = 'DEFAULT' # section of sat.conf where log options should be
    LOG_OPT_PREFIX = 'log_'
    # (option_name, default_value) tuples
    LOG_OPT_COLORS = ('colors', 'true') # true for auto colors, force to have colors even if stdout is not a tty, false for no color
    LOG_OPT_TAINTS_DICT = ('levels_taints_dict', {
        LOG_LVL_DEBUG: ('cyan',),
        LOG_LVL_INFO: (),
        LOG_LVL_WARNING: ('yellow',),
        LOG_LVL_ERROR: ('red', 'blink', r'/!\ ', 'blink_off'),
        LOG_LVL_CRITICAL: ('bold', 'red', 'Guru Meditation ', 'normal_weight')
        })
    LOG_OPT_LEVEL = ('level', 'info')
    LOG_OPT_FORMAT = ('fmt', '%(message)s') # similar to logging format.
    LOG_OPT_LOGGER = ('logger', '') # regex to filter logger name
    LOG_OPT_OUTPUT_SEP = '//'
    LOG_OPT_OUTPUT_DEFAULT = 'default'
    LOG_OPT_OUTPUT_MEMORY = 'memory'
    LOG_OPT_OUTPUT_MEMORY_LIMIT = 50
    LOG_OPT_OUTPUT_FILE = 'file' # file is implicit if only output
    LOG_OPT_OUTPUT = ('output', LOG_OPT_OUTPUT_SEP + LOG_OPT_OUTPUT_DEFAULT) # //default = normal output (stderr or a file with twistd), path/to/file for a file (must be the first if used), //memory for memory (options can be put in parenthesis, e.g.: //memory(500) for a 500 lines memory)


    ## action constants ##
    META_TYPE_FILE = "file"
    META_TYPE_OVERWRITE = "overwrite"


    ## HARD-CODED ACTIONS IDS (generated with uuid.uuid4) ##
    AUTHENTICATE_PROFILE_ID = u'b03bbfa8-a4ae-4734-a248-06ce6c7cf562'
    CHANGE_XMPP_PASSWD_ID = u'878b9387-de2b-413b-950f-e424a147bcd0'


    ## Text values ##
    BOOL_TRUE = "true"
    BOOL_FALSE = "false"


    ## Special values used in bridge methods calls ##
    HISTORY_LIMIT_DEFAULT = -1
    HISTORY_LIMIT_NONE = -2


    ## Misc ##
    SAVEFILE_DATABASE = APP_NAME_FILE + ".db"
    IQ_SET = '/iq[@type="set"]'
    ENV_PREFIX = 'SAT_' # Prefix used for environment variables
    IGNORE = 'ignore'
    NO_LIMIT = -1 # used in bridge when a integer value is expected


    ## ANSI escape sequences ##
    # XXX: used for logging
    # XXX: they will be probably moved in a dedicated module in the future
    ANSI_RESET = '\033[0m'
    ANSI_NORMAL_WEIGHT = '\033[22m'
    ANSI_FG_BLACK, ANSI_FG_RED, ANSI_FG_GREEN, ANSI_FG_YELLOW, ANSI_FG_BLUE, ANSI_FG_MAGENTA, ANSI_FG_CYAN, ANSI_FG_WHITE = ('\033[3%dm' % nb for nb in xrange(8))
    ANSI_BOLD = '\033[1m'
    ANSI_BLINK = '\033[5m'
    ANSI_BLINK_OFF = '\033[25m'

    @classmethod
    def LOG_OPTIONS(cls):
        """Return options checked for logs"""
        # XXX: we use a classmethod so we can use Const inheritance to change default options
        return(cls.LOG_OPT_COLORS, cls.LOG_OPT_TAINTS_DICT, cls.LOG_OPT_LEVEL, cls.LOG_OPT_FORMAT, cls.LOG_OPT_LOGGER, cls.LOG_OPT_OUTPUT)

    @classmethod
    def bool(cls, value):
        """@return (bool): bool value for associated constant"""
        assert isinstance(value, basestring)
        return value.lower() in (cls.BOOL_TRUE, "1")

    @classmethod
    def boolConst(cls, value):
        """@return (str): constant associated to bool value"""
        assert isinstance(value, bool)
        return cls.BOOL_TRUE if value else cls.BOOL_FALSE