# -*- mode: python; indent-tabs-mode: nil; py-indent-offset: 4; coding: utf-8 -*-
from settings import Settings
from bot import Bot
from wrapper.toxcore_enums_and_consts import *
from wrapper.tox import bin_to_string

global LOG
import logging
LOG = logging.getLogger(__name__)

# -----------------------------------------------------------------------------------------------------------------
# Callbacks - current user
# -----------------------------------------------------------------------------------------------------------------


def self_connection_status():
    """
    Current user changed connection status (offline, UDP, TCP)
    """
    def wrapped(tox, connection, user_data):
        LOG.debug('Connection status: ' + str(connection))
    return wrapped


# -----------------------------------------------------------------------------------------------------------------
# Callbacks - friends
# -----------------------------------------------------------------------------------------------------------------


def friend_connection_status(tox, friend_num, new_status, user_data):
    """
    Check friend's connection status (offline, udp, tcp)
    """
    LOG.info("Friend #{} connected! Friend's status: {}".format(friend_num, new_status))


def friend_message():
    """
    New message from friend
    """
    def wrapped(tox, friend_number, message_type, message, size, user_data):
        LOG.info(message.decode('utf-8'))
        Bot.get_instance().new_message(friend_number, message.decode('utf-8'))
        # parse message
    return wrapped


def friend_request(tox, public_key, message, message_size, user_data):
    """
    Called when user get new friend request
    """
    profile = Bot.get_instance()
    key = ''.join(chr(x) for x in public_key[:TOX_PUBLIC_KEY_SIZE])
    tox_id = bin_to_string(key, TOX_PUBLIC_KEY_SIZE)
    profile.process_friend_request(tox_id, message.decode('utf-8'))

# -----------------------------------------------------------------------------------------------------------------
# Callbacks - file transfers
# -----------------------------------------------------------------------------------------------------------------


def tox_file_recv(tox_link):
    """
    New incoming file
    """
    def wrapped(tox, friend_number, file_number, file_type, size, file_name, file_name_size, user_data):
        profile = Bot.get_instance()
        if file_type == TOX_FILE_KIND['DATA']:
            LOG.info('file')
            file_name = unicode(file_name[:file_name_size].decode('utf-8'))
            profile.incoming_file_transfer(friend_number, file_number, size, file_name)
        else:  # AVATAR
            tox_link.file_control(friend_number, file_number, TOX_FILE_CONTROL['CANCEL'])
    return wrapped


def file_recv_chunk(tox, friend_number, file_number, position, chunk, length, user_data):
    """
    Incoming chunk
    """
    Bot.get_instance().incoming_chunk(
                          friend_number,
                          file_number,
                          position,
                          chunk[:length] if length else None)


def file_chunk_request(tox, friend_number, file_number, position, size, user_data):
    """
    Outgoing chunk
    """
    Bot.get_instance().outgoing_chunk(
                          friend_number,
                          file_number,
                          position,
                          size)


def file_recv_control(tox, friend_number, file_number, file_control, user_data):
    """
    Friend cancelled, paused or resumed file transfer
    """
    if file_control == TOX_FILE_CONTROL['CANCEL']:
        Bot.get_instance().cancel_transfer(friend_number, file_number, True)

# -----------------------------------------------------------------------------------------------------------------
# Callbacks - initialization
# -----------------------------------------------------------------------------------------------------------------


def init_callbacks(tox):
    """
    Initialization of all callbacks.
    :param tox: tox instance
    """
    tox.callback_self_connection_status(self_connection_status())

    tox.callback_friend_message(friend_message())
    tox.callback_friend_connection_status(friend_connection_status)
    tox.callback_friend_request(friend_request)

    tox.callback_file_recv(tox_file_recv(tox))
    tox.callback_file_recv_chunk(file_recv_chunk)
    tox.callback_file_chunk_request(file_chunk_request)
    tox.callback_file_recv_control(file_recv_control)