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#! /usr/bin/python3

from __future__ import print_function
from __future__ import division
from __future__ import absolute_import
from __future__ import unicode_literals

import dbus
from dbus.mainloop.glib import DBusGMainLoop
from gi.repository import Pango
import os.path
import sys
import signal

#support running uninstalled
_dirname = os.path.abspath(os.path.join(os.path.dirname(__file__), '..'))
if os.path.exists(os.path.join(_dirname, "CHANGELOG.md")):
    sys.path.insert(0, _dirname)

import blueman.bluez as Bluez
from blueman.Constants import *
from blueman.Functions import *
from blueman.main.SignalTracker import SignalTracker

enable_rgba_colormap()

import gi
gi.require_version("Gtk", "3.0")
from gi.repository import Gtk

DBusGMainLoop(set_as_default=True)

# Workaround introspection bug, gnome bug 622084
signal.signal(signal.SIGINT, signal.SIG_DFL)

class BluemanAdapters:
    def __init__(self, selected_hci_dev):
        setup_icon_path()
        self.bus = dbus.SystemBus()
        self.bus.watch_name_owner('org.bluez', self.on_dbus_name_owner_change)

        builder = Gtk.Builder()
        builder.set_translation_domain("blueman")
        builder.add_from_file(UI_PATH + "/adapters.ui")
        self.dialog = builder.get_object("dialog")

        check_single_instance("blueman-adapters", lambda time: self.dialog.present_with_time(time))

        check_bluetooth_status(_("Bluetooth needs to be turned on for the adapter manager to work"), lambda: exit())

        self.dialog.props.icon_name = "blueman-device"
        self.dialog.connect("response", self.on_dialog_response)
        self.notebook = builder.get_object("notebook")
        self.tabs = {}

        try:
            self.signals = SignalTracker()
            self.manager = Bluez.Manager()
            self.signals.Handle("bluez", self.manager, self.on_adapter_added, 'AdapterAdded')
            adapters = self.manager.list_adapters()
            for adapter in adapters:
                self.add_to_notebook(adapter)
        except Exception as e:
            print(e)
            self.manager = None
        #fixme: show error dialog and exit

        #activate a particular tab according to command line option
        if selected_hci_dev is not None:
            if selected_hci_dev in self.tabs:
                hci_dev_num = int(selected_hci_dev[3:])
                self.notebook.set_current_page(hci_dev_num)
            else:
                print('Error: the selected adapter does not exist')
        self.dialog.show()
        Gtk.main()

    def on_dialog_response(self, dialog, response_id):
        for hci, settings in self.tabs.items():
            if settings['changed']:
                settings['adapter'].set_name(settings['name'])
        Gtk.main_quit()

    def on_adapter_added(self, adapter_path):
        def on_property_changed(name, value):
            if name == 'Powered' and value:
                adapter.unhandle_signal(on_property_changed, "PropertyChanged")
                self.add_to_notebook(adapter)

        adapter = Bluez.Adapter(adapter_path)
        adapter.handle_signal(on_property_changed, "PropertyChanged")

    def on_dbus_name_owner_change(self, owner):
        print('org.bluez owner changed to '+owner)
        if owner == '':
            self.manager = None
        #fixme: show error dialog and exit

    def build_adapter_tab(self, adapter):
        adapter_settings = {}

        def on_property_changed(name, value):
            if name == 'Powered':
                if not value:
                    self.remove_from_notebook(adapter)
                else:
                    self.add_to_notebook(adapter)
            elif name == "Discoverable":
                if value == 0:
                    hidden_radio.set_active(True)

        def on_hidden_toggle(radio):
            if not radio.props.active:
                return
            adapter_settings['discoverable'] = False
            adapter.set('Discoverable', False)
            hscale.set_sensitive(False)
            #we need to triger "format-value" signal
            hscale.set_value(1)
            hscale.set_value(0)

        def on_always_toggle(radio):
            if not radio.props.active:
                return
            adapter_settings['discoverable'] = True
            adapter.set('Discoverable', True)
            hscale.set_sensitive(False)
            #we need to triger "format-value" signal
            hscale.set_value(1)
            hscale.set_value(0)

        def on_temporary_toggle(radio):
            if not radio.props.active:
                return
            adapter_settings['discoverable'] = True
            adapter.set('Discoverable', True)
            hscale.set_sensitive(True)
            hscale.set_value(3)

        def on_scale_format_value(scale, value):
            if value == 0:
                if adapter_settings['discoverable']:
                    return _("Always")
                else:
                    return _("Hidden")
            else:
                return gettext.ngettext("%d Minute", "%d Minutes", value) % (value)

        def on_scale_value_changed(scale):
            val = scale.get_value()
            print('value: '+str(val))
            if val == 0 and adapter_settings['discoverable']:
                always_radio.props.active = True
            timeout = int(val * 60)
            adapter.set('DiscoverableTimeout', timeout)

        def on_name_changed(entry):
            adapter_settings['name'] = entry.get_text()
            adapter_settings['changed'] = True

        props = adapter.get_properties()
        adapter_settings['adapter'] = adapter
        adapter_settings['signals'] = SignalTracker()
        adapter_settings['signals'].Handle(adapter, on_property_changed, "PropertyChanged")
        adapter_settings['address'] = props['Address']
        adapter_settings['name'] = adapter.get_name()
        adapter_settings['discoverable'] = props['Discoverable']
        #we use count timeout in minutes
        adapter_settings['discoverable_timeout'] = props['DiscoverableTimeout'] / 60
        adapter_settings['changed'] = False

        builder = Gtk.Builder()
        builder.set_translation_domain("blueman")
        builder.add_from_file(UI_PATH + "/adapters-tab.ui")
        adapter_settings['vbox'] = builder.get_object("vbox1")

        hscale = builder.get_object("hscale")
        hscale.set_range(0, 30)
        hscale.set_increments(1, 1)
        if adapter_settings['discoverable']:
            hscale.set_value(adapter_settings['discoverable_timeout'])
            hscale.set_sensitive(adapter_settings['discoverable_timeout'] > 0)
        adapter_settings['signals'].Handle(hscale, "format-value", on_scale_format_value)
        adapter_settings['signals'].Handle(hscale, "value-changed", on_scale_value_changed)

        hidden_radio = builder.get_object("hidden1")
        if not adapter_settings['discoverable']:
            hidden_radio.set_active(True)
        adapter_settings['signals'].Handle(hidden_radio, "toggled", on_hidden_toggle)
        always_radio = builder.get_object("always")
        if adapter_settings['discoverable'] and adapter_settings['discoverable_timeout'] == 0:
            always_radio.set_active(True)
        adapter_settings['signals'].Handle(always_radio, "toggled", on_always_toggle)
        temporary_radio = builder.get_object("temporary")
        if adapter_settings['discoverable'] and adapter_settings['discoverable_timeout'] > 0:
            temporary_radio.set_active(True)
        adapter_settings['signals'].Handle(temporary_radio, "toggled", on_temporary_toggle)

        name_entry = builder.get_object("name_entry")
        name_entry.set_text(adapter_settings['name'])
        adapter_settings['signals'].Handle(name_entry, "changed", on_name_changed)

        return adapter_settings

    def add_to_notebook(self, adapter):
        hci_dev = os.path.basename(adapter.get_object_path())
        hci_dev_num = int(hci_dev[3:])

        if not hci_dev in self.tabs:
            self.tabs[hci_dev] = self.build_adapter_tab(adapter)
        else:
            if self.tabs[hci_dev]['visible']:
                return
            #might need to update settings at this point
        settings = self.tabs[hci_dev]
        settings['visible'] = True
        name = settings['name']
        if name == '':
            name = _('Adapter') + ' %d' % (hci_dev_num + 1)
        label = Gtk.Label(label=name)
        label.set_max_width_chars(20)
        label.props.hexpand = True
        label.set_ellipsize(Pango.EllipsizeMode.END)
        self.notebook.insert_page(settings['vbox'], label, hci_dev_num)

    def remove_from_notebook(self, adapter):
        hci_dev = os.path.basename(adapter.get_object_path())
        hci_dev_num = int(hci_dev[3:])

        self.tabs[hci_dev]['visible'] = False
        self.notebook.remove_page(hci_dev_num)

    #leave actual tab contents intact in case adapter becomes present once again


if __name__ == '__main__':
    set_proc_title()
    adapter_name = None
    if len(sys.argv) > 1:
        adapter_name = sys.argv[1]
    BluemanAdapters(adapter_name)