#!/usr/bin/python3
#
# thanhle Bluetooth keyboard/Mouse emulator DBUS Service
#

from __future__ import absolute_import, print_function
from optparse import OptionParser, make_option
import os
import sys
import uuid
import dbus
import dbus.service
import dbus.mainloop.glib
import time
import socket
from gi.repository import GLib
from dbus.mainloop.glib import DBusGMainLoop
import logging
from logging import debug, info, warning, error
import btk_dbus

logging.basicConfig(level=logging.DEBUG)


class BTKbDevice():
    # change these constants
    MY_ADDRESS = "BLUETOOTH_ADDRESS_PLACEHOLDER"
    MY_DEV_NAME = "DEVICE_NAME_PLACEHOLDER"

    # define some constants
    P_CTRL = 17  # Service port - must match port configured in SDP record
    P_INTR = 19  # Service port - must match port configured in SDP record#Interrrupt port
    # dbus path of the bluez profile we will create
    # file path of the sdp record to load
    SDP_RECORD_PATH = sys.path[0] + "/sdp_record.xml"
    UUID = "00001124-0000-1000-8000-00805f9b34fb"

    def __init__(self):
        self.init_bt_device()
        self.init_bluez_profile()

    # configure the bluetooth hardware device
    def init_bt_device(self):
        print("2. Start and config bluetooth device")
        # set the device class to a keybord and set the name
        os.system("hciconfig hci0 up")
        os.system("hciconfig hci0 class 0x0025C0")
        os.system("hciconfig hci0 name " + BTKbDevice.MY_DEV_NAME)
        print("   bluetooth name is: ", BTKbDevice.MY_DEV_NAME)
        # make the device discoverable
        os.system("hciconfig hci0 piscan")

    # set up a bluez profile to advertise device capabilities from a loaded service record
    def init_bluez_profile(self):
        print("3. Configuring Bluez Profile")
        # setup profile options
        service_record = self.read_sdp_service_record()
        opts = {
            "AutoConnect": True,
            "ServiceRecord": service_record
        }
        # retrieve a proxy for the bluez profile interface
        bus = dbus.SystemBus()
        manager = dbus.Interface(bus.get_object(
            "org.bluez", "/org/bluez"), "org.bluez.ProfileManager1")
        manager.RegisterProfile("/org/bluez/hci0", BTKbDevice.UUID, opts)
        print("5. Profile registered ")

    # read and return an sdp record from a file
    def read_sdp_service_record(self):
        print("4. Reading service record")
        try:
            fh = open(BTKbDevice.SDP_RECORD_PATH, "r")
        except:
            sys.exit("Could not open the sdp record. Exiting...")
        return fh.read()

    # listen for incoming client connections
    def listen(self):
        print("\033[0;33m7. Waiting for connections\033[0m")
        self.scontrol = socket.socket(
            socket.AF_BLUETOOTH, socket.SOCK_SEQPACKET, socket.BTPROTO_L2CAP)  # BluetoothSocket(L2CAP)
        self.sinterrupt = socket.socket(
            socket.AF_BLUETOOTH, socket.SOCK_SEQPACKET, socket.BTPROTO_L2CAP)  # BluetoothSocket(L2CAP)
        self.scontrol.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        self.sinterrupt.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        # bind these sockets to a port - port zero to select next available
        self.scontrol.bind((socket.BDADDR_ANY, self.P_CTRL))
        self.sinterrupt.bind((socket.BDADDR_ANY, self.P_INTR))

        # Start listening on the server sockets
        self.scontrol.listen(5)
        self.sinterrupt.listen(5)

        self.ccontrol, cinfo = self.scontrol.accept()
        print (
            "\033[0;32mGot a connection on the control channel from %s \033[0m" % cinfo[0])

        self.cinterrupt, cinfo = self.sinterrupt.accept()
        print (
            "\033[0;32mGot a connection on the interrupt channel from %s \033[0m" % cinfo[0])

    # send a string to the bluetooth host machine
    def send_string(self, message):
        try:
            self.cinterrupt.send(bytes(message))
        except OSError as err:
            error(err)


# main routine
if __name__ == "__main__":
    # we an only run as root
    try:
        if not os.geteuid() == 0:
            sys.exit("Only root can run this script")

        DBusGMainLoop(set_as_default=True)

        print("1. Setting up BTK device")
        service = BTKbDevice()

        print("6. Register service to dbus")
        btk_dbus.BTKbService(service)
        service.listen()

        loop = GLib.MainLoop()
        loop.run()
    except KeyboardInterrupt:
        sys.exit()