"""Displays bluetooth status. Left mouse click launches manager app `blueman-manager`,
right click toggles bluetooth. Needs dbus-send to toggle bluetooth state and
python-dbus to count the number of connections

Parameters:
    * bluetooth.manager : application to launch on click (blueman-manager)

contributed by `martindoublem <https://github.com/martindoublem>`_ - many thanks!
"""

import os
import re
import subprocess
import dbus
import dbus.mainloop.glib
import logging

import core.module
import core.widget
import core.input

import util.cli

class Module(core.module.Module):
    def __init__(self, config, theme):
        super().__init__(config, theme, core.widget.Widget(self.status))

        self.manager = self.parameter("manager", "blueman-manager")
        self._status = "Off"
        dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
        self._bus = dbus.SystemBus()

        core.input.register(self, button=core.input.LEFT_MOUSE, cmd=self.manager)
        core.input.register(self, button=core.input.RIGHT_MOUSE, cmd=self._toggle)

    def status(self, widget):
        """Get status."""
        return self._status

    def update(self):
        """Update current state."""
        state = len(
            subprocess.run(["bluetoothctl", "list"], stdout=subprocess.PIPE).stdout
        )
        if state > 0:
            connected_devices = self.get_connected_devices()
            self._status = "{}".format(connected_devices)
        else:
            self._status = "Off"
            adapters_cmd = "rfkill list | grep Bluetooth"
            if not len(
                subprocess.run(adapters_cmd, shell=True, stdout=subprocess.PIPE).stdout
            ):
                self._status = "No Adapter Found"
        return

    def _toggle(self, widget=None):
        """Toggle bluetooth state."""
        logging.debug("bt: toggling bluetooth")

        SetRfkillState = self._bus.get_object("org.blueman.Mechanism", "/org/blueman/mechanism").get_dbus_method("SetRfkillState", dbus_interface="org.blueman.Mechanism")
        SetRfkillState(self._status == "Off")

    def state(self, widget):
        """Get current state."""
        state = []

        if self._status in [ "No Adapter Found", "Off" ]:
            state.append("critical")
        elif self._status == "0":
            state.append("warning")
        else:
            state.append("ON")

        return state

    def get_connected_devices(self):
        devices = 0
        objects = dbus.Interface(
            self._bus.get_object("org.bluez", "/"), "org.freedesktop.DBus.ObjectManager"
        ).GetManagedObjects()
        for path, interfaces in objects.items():
            if "org.bluez.Device1" in interfaces:
                if dbus.Interface(self._bus.get_object("org.bluez", path), "org.freedesktop.DBus.Properties", ).Get("org.bluez.Device1", "Connected"):
                    devices += 1
        return devices

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