#
# Copyright (C) 2006, 2012-2013 Red Hat, Inc.
# Copyright (C) 2006 Daniel P. Berrange <berrange@redhat.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301 USA.
#

import logging

from gi.repository import Gtk
from gi.repository import Gdk

from . import uiutil
from .baseclass import vmmGObjectUI


class vmmPreferences(vmmGObjectUI):
    def __init__(self):
        vmmGObjectUI.__init__(self, "preferences.ui", "vmm-preferences")

        self._init_ui()

        self.refresh_view_system_tray()
        self.refresh_update_interval()
        self.refresh_console_accels()
        self.refresh_console_scaling()
        self.refresh_console_resizeguest()
        self.refresh_new_vm_sound()
        self.refresh_graphics_type()
        self.refresh_add_spice_usbredir()
        self.refresh_storage_format()
        self.refresh_cpu_default()
        self.refresh_cpu_poll()
        self.refresh_disk_poll()
        self.refresh_net_poll()
        self.refresh_memory_poll()
        self.refresh_grabkeys_combination()
        self.refresh_confirm_forcepoweroff()
        self.refresh_confirm_poweroff()
        self.refresh_confirm_pause()
        self.refresh_confirm_removedev()
        self.refresh_confirm_interface()
        self.refresh_confirm_unapplied()
        self.refresh_confirm_delstorage()

        self.builder.connect_signals({
            "on_vmm_preferences_delete_event": self.close,
            "on_prefs_close_clicked": self.close,

            "on_prefs_system_tray_toggled": self.change_view_system_tray,
            "on_prefs_stats_update_interval_changed": self.change_update_interval,
            "on_prefs_console_accels_toggled": self.change_console_accels,
            "on_prefs_console_scaling_changed": self.change_console_scaling,
            "on_prefs_console_resizeguest_changed": self.change_console_resizeguest,
            "on_prefs_new_vm_sound_toggled": self.change_new_vm_sound,
            "on_prefs_graphics_type_changed": self.change_graphics_type,
            "on_prefs_add_spice_usbredir_changed": self.change_add_spice_usbredir,
            "on_prefs_storage_format_changed": self.change_storage_format,
            "on_prefs_cpu_default_changed": self.change_cpu_default,
            "on_prefs_stats_enable_cpu_toggled": self.change_cpu_poll,
            "on_prefs_stats_enable_disk_toggled": self.change_disk_poll,
            "on_prefs_stats_enable_net_toggled": self.change_net_poll,
            "on_prefs_stats_enable_memory_toggled": self.change_memory_poll,
            "on_prefs_confirm_forcepoweroff_toggled": self.change_confirm_forcepoweroff,
            "on_prefs_confirm_poweroff_toggled": self.change_confirm_poweroff,
            "on_prefs_confirm_pause_toggled": self.change_confirm_pause,
            "on_prefs_confirm_removedev_toggled": self.change_confirm_removedev,
            "on_prefs_confirm_interface_toggled": self.change_confirm_interface,
            "on_prefs_confirm_unapplied_toggled": self.change_confirm_unapplied,
            "on_prefs_confirm_delstorage_toggled": self.change_confirm_delstorage,
            "on_prefs_btn_keys_define_clicked": self.change_grab_keys,
        })

        self.widget("prefs-graphics-type").emit("changed")

        self.bind_escape_key_close()

    def close(self, ignore1=None, ignore2=None):
        logging.debug("Closing preferences")
        self.topwin.hide()
        return 1

    def show(self, parent):
        logging.debug("Showing preferences")
        self.topwin.set_transient_for(parent)
        self.topwin.present()

    def _cleanup(self):
        pass

    def _init_ui(self):
        combo = self.widget("prefs-console-scaling")
        # [gsettings value, string]
        model = Gtk.ListStore(int, str)
        for row in [[0, _("Never")],
                    [1, _("Fullscreen only")],
                    [2, _("Always")]]:
            model.append(row)
        combo.set_model(model)
        uiutil.init_combo_text_column(combo, 1)

        combo = self.widget("prefs-console-resizeguest")
        # [gsettings value, string]
        model = Gtk.ListStore(int, str)
        vals = {
            0: _("Off"),
            1: _("On"),
        }
        model.append([-1, _("System default (%s)") %
            vals[self.config.default_console_resizeguest]])
        for key, val in vals.items():
            model.append([key, val])
        combo.set_model(model)
        uiutil.init_combo_text_column(combo, 1)

        combo = self.widget("prefs-graphics-type")
        # [gsettings value, string]
        model = Gtk.ListStore(str, str)
        for row in [["system", _("System default (%s)") %
                     self.config.default_graphics_from_config],
                    ["vnc", "VNC"], ["spice", "Spice"]]:
            model.append(row)
        combo.set_model(model)
        uiutil.init_combo_text_column(combo, 1)

        combo = self.widget("prefs-add-spice-usbredir")
        # [gsettings value, string]
        model = Gtk.ListStore(str, str)
        for row in [["system", _("System default (%s)") %
                     self.config.default_add_spice_usbredir],
                    ["yes", _("Yes")], ["no", _("No")]]:
            model.append(row)
        combo.set_model(model)
        uiutil.init_combo_text_column(combo, 1)

        combo = self.widget("prefs-storage-format")
        # [gsettings value, string]
        model = Gtk.ListStore(str, str)
        for row in [["default", _("System default (%s)") %
                    self.config.default_storage_format_from_config],
                    ["raw", "Raw"],
                    ["qcow2", "QCOW2"]]:
            model.append(row)
        combo.set_model(model)
        uiutil.init_combo_text_column(combo, 1)

        combo = self.widget("prefs-cpu-default")
        # [gsettings value, string]
        model = Gtk.ListStore(str, str)
        for row in [["default", _("System default (%s)") %
                    self.config.cpu_default_from_config],
                    ["hv-default", _("Hypervisor default")],
                    ["host-model-only", _("Nearest host CPU model")],
                    ["host-model", _("Copy host CPU definition")]]:
            model.append(row)
        combo.set_model(model)
        uiutil.init_combo_text_column(combo, 1)


    #########################
    # Config Change Options #
    #########################

    def refresh_view_system_tray(self):
        val = self.config.get_view_system_tray()
        self.widget("prefs-system-tray").set_active(bool(val))

    def refresh_update_interval(self):
        self.widget("prefs-stats-update-interval").set_value(
            self.config.get_stats_update_interval())

    def refresh_console_accels(self):
        self.widget("prefs-console-accels").set_active(
            self.config.get_console_accels())
    def refresh_console_scaling(self):
        combo = self.widget("prefs-console-scaling")
        val = self.config.get_console_scaling()
        uiutil.set_list_selection(combo, val)
    def refresh_console_resizeguest(self):
        combo = self.widget("prefs-console-resizeguest")
        val = self.config.get_console_resizeguest()
        uiutil.set_list_selection(combo, val)

    def refresh_new_vm_sound(self):
        self.widget("prefs-new-vm-sound").set_active(
            self.config.get_new_vm_sound())
    def refresh_graphics_type(self):
        combo = self.widget("prefs-graphics-type")
        gtype = self.config.get_graphics_type(raw=True)
        uiutil.set_list_selection(combo, gtype)
    def refresh_add_spice_usbredir(self):
        combo = self.widget("prefs-add-spice-usbredir")
        val = self.config.get_add_spice_usbredir(raw=True)
        uiutil.set_list_selection(combo, val)
    def refresh_storage_format(self):
        combo = self.widget("prefs-storage-format")
        val = self.config.get_default_storage_format(raw=True)
        uiutil.set_list_selection(combo, val)
    def refresh_cpu_default(self):
        combo = self.widget("prefs-cpu-default")
        val = self.config.get_default_cpu_setting(raw=True)
        uiutil.set_list_selection(combo, val)

    def refresh_cpu_poll(self):
        self.widget("prefs-stats-enable-cpu").set_active(
            self.config.get_stats_enable_cpu_poll())
    def refresh_disk_poll(self):
        self.widget("prefs-stats-enable-disk").set_active(
            self.config.get_stats_enable_disk_poll())
    def refresh_net_poll(self):
        self.widget("prefs-stats-enable-net").set_active(
            self.config.get_stats_enable_net_poll())
    def refresh_memory_poll(self):
        self.widget("prefs-stats-enable-memory").set_active(
            self.config.get_stats_enable_memory_poll())

    def refresh_grabkeys_combination(self):
        val = self.config.get_keys_combination()

        # We convert keysyms to names
        if not val:
            keystr = "Control_L+Alt_L"
        else:
            keystr = None
            for k in val.split(','):
                try:
                    key = int(k)
                except Exception:
                    key = None

                if key is not None:
                    if keystr is None:
                        keystr = Gdk.keyval_name(key)
                    else:
                        keystr = keystr + "+" + Gdk.keyval_name(key)


        self.widget("prefs-keys-grab-sequence").set_text(keystr)

    def refresh_confirm_forcepoweroff(self):
        self.widget("prefs-confirm-forcepoweroff").set_active(
                                self.config.get_confirm_forcepoweroff())
    def refresh_confirm_poweroff(self):
        self.widget("prefs-confirm-poweroff").set_active(
                                self.config.get_confirm_poweroff())
    def refresh_confirm_pause(self):
        self.widget("prefs-confirm-pause").set_active(
                                self.config.get_confirm_pause())
    def refresh_confirm_removedev(self):
        self.widget("prefs-confirm-removedev").set_active(
                                self.config.get_confirm_removedev())
    def refresh_confirm_interface(self):
        self.widget("prefs-confirm-interface").set_active(
                                self.config.get_confirm_interface())
    def refresh_confirm_unapplied(self):
        self.widget("prefs-confirm-unapplied").set_active(
                                self.config.get_confirm_unapplied())
    def refresh_confirm_delstorage(self):
        self.widget("prefs-confirm-delstorage").set_active(
                                self.config.get_confirm_delstorage())

    def grabkeys_get_string(self, events):
        keystr = ""
        for ignore, keyval in events:
            if keystr:
                keystr += "+"
            keystr += Gdk.keyval_name(keyval)
        return keystr

    def grabkeys_dlg_press(self, src_ignore, event, label, events):
        if not [e for e in events if e[0] == event.hardware_keycode]:
            events.append((event.hardware_keycode, event.keyval))

        label.set_text(self.grabkeys_get_string(events))

    def grabkeys_dlg_release(self, src_ignore, event, label, events):
        for e in [e for e in events if e[0] == event.hardware_keycode]:
            events.remove(e)

        label.set_text(self.grabkeys_get_string(events))

    def change_grab_keys(self, src_ignore):
        dialog = Gtk.Dialog(_("Configure grab key combination"),
                            self.topwin,
                            Gtk.DialogFlags.MODAL | Gtk.DialogFlags.DESTROY_WITH_PARENT,
                            (Gtk.STOCK_CANCEL, Gtk.ResponseType.REJECT,
                             Gtk.STOCK_OK, Gtk.ResponseType.ACCEPT))
        dialog.set_default_size(325, 160)
        dialog.set_border_width(6)

        infolabel = Gtk.Label(
            label=_("You can now define grab keys by pressing them.\n"
                    "To confirm your selection please click OK button\n"
                    "while you have desired keys pressed."))
        keylabel = Gtk.Label(label=_("Please press desired grab key combination"))

        vbox = Gtk.VBox()
        vbox.set_spacing(12)
        vbox.pack_start(infolabel, False, False, 0)
        vbox.pack_start(keylabel, False, False, 0)
        dialog.get_content_area().add(vbox)

        events = []
        dialog.connect("key-press-event", self.grabkeys_dlg_press,
                       keylabel, events)
        dialog.connect("key-release-event", self.grabkeys_dlg_release,
                       keylabel, events)
        dialog.show_all()
        result = dialog.run()

        if result == Gtk.ResponseType.ACCEPT:
            self.config.set_keys_combination([e[1] for e in events])

        self.refresh_grabkeys_combination()
        dialog.destroy()

    def change_view_system_tray(self, src):
        self.config.set_view_system_tray(src.get_active())

    def change_update_interval(self, src):
        self.config.set_stats_update_interval(src.get_value_as_int())

    def change_console_accels(self, src):
        self.config.set_console_accels(src.get_active())
    def change_console_scaling(self, box):
        self.config.set_console_scaling(box.get_active())
    def change_console_resizeguest(self, box):
        val = uiutil.get_list_selection(box)
        self.config.set_console_resizeguest(val)

    def change_new_vm_sound(self, src):
        self.config.set_new_vm_sound(src.get_active())
    def change_graphics_type(self, src):
        val = uiutil.get_list_selection(src)
        self.config.set_graphics_type(val)
        uiutil.set_grid_row_visible(
            self.widget("prefs-add-spice-usbredir"),
            self.config.get_graphics_type() == "spice")
    def change_add_spice_usbredir(self, src):
        self.config.set_add_spice_usbredir(uiutil.get_list_selection(src))
    def change_storage_format(self, src):
        typ = uiutil.get_list_selection(src) or "default"
        self.config.set_storage_format(typ.lower())
    def change_cpu_default(self, src):
        typ = uiutil.get_list_selection(src) or "default"
        self.config.set_default_cpu_setting(typ.lower())

    def change_cpu_poll(self, src):
        self.config.set_stats_enable_cpu_poll(src.get_active())
    def change_disk_poll(self, src):
        self.config.set_stats_enable_disk_poll(src.get_active())
    def change_net_poll(self, src):
        self.config.set_stats_enable_net_poll(src.get_active())
    def change_memory_poll(self, src):
        self.config.set_stats_enable_memory_poll(src.get_active())

    def change_confirm_forcepoweroff(self, src):
        self.config.set_confirm_forcepoweroff(src.get_active())
    def change_confirm_poweroff(self, src):
        self.config.set_confirm_poweroff(src.get_active())
    def change_confirm_pause(self, src):
        self.config.set_confirm_pause(src.get_active())
    def change_confirm_removedev(self, src):
        self.config.set_confirm_removedev(src.get_active())
    def change_confirm_interface(self, src):
        self.config.set_confirm_interface(src.get_active())
    def change_confirm_unapplied(self, src):
        self.config.set_confirm_unapplied(src.get_active())
    def change_confirm_delstorage(self, src):
        self.config.set_confirm_delstorage(src.get_active())
