import csv
import gi
import locale
import logging
import os
import signal
import multiprocessing
import re
import subprocess
import sys
import threading
import time

locale.setlocale(locale.LC_ALL, '')
gi.require_version("Gtk", "3.0")
from gi.repository import Gtk, GLib, Gdk, GObject, Pango

# 5.0.0-rc.11
app_name = "DZGUI"

cache = {}
config_vals = []
stored_keys = []
toggled_checks = []
server_filters = []
delimiter = "␞"
selected_map = ["Map=All maps"]
keyword_filter = ["Keyword%s" %(delimiter)]

checks = list()
map_store = Gtk.ListStore(str)
row_store = Gtk.ListStore(str)
modlist_store = Gtk.ListStore(str, str, str)
# Name, Symlink, ID, Size
mod_store = Gtk.ListStore(str, str, str, float)
# Timestamp, Flag, Trace, Message
log_store = Gtk.ListStore(str, str, str, str)
# Name, Map, Perspective, Gametime, Players, Max, IP, Qport
server_store = Gtk.ListStore(str, str, str, str, int, int, str, int)

default_tooltip = "Select a row to see its detailed description"
server_tooltip = [None, None]

user_path = os.path.expanduser('~')
state_path = '%s/.local/state/dzgui' %(user_path)
helpers_path = '%s/.local/share/dzgui/helpers' %(user_path)
log_path = '%s/logs' %(state_path)
changelog_path = '%s/CHANGELOG.md' %(state_path)
funcs = '%s/funcs' %(helpers_path)

logger = logging.getLogger(__name__)
log_file = '%s/DZGUI_DEBUG.log' %(log_path)
system_log = '%s/DZGUI_SYSTEM.log' %(log_path)
FORMAT = "%(asctime)s␞%(levelname)s␞%(filename)s::%(funcName)s::%(lineno)s␞%(message)s"
logging.basicConfig(filename=log_file,
   format=FORMAT,
level=logging.DEBUG)

browser_cols = [
    "Name",
    "Map",
    "Perspective",
    "Gametime",
    "Players",
    "Maximum",
    "IP",
    "Qport",
]
mod_cols = [
    "Mod",
    "Symlink",
    "Dir",
    "Size (MiB)"
]
log_cols = [
    "Timestamp",
    "Flag",
    "Traceback",
    "Message"
]
connect = [
    ("Server browser",),
    ("My saved servers",),
    ("Quick-connect to favorite server",),
    ("Recent servers",),
    ("Connect by IP",),
    ("Connect by ID",)
]
manage = [
    ("Add server by IP",),
    ("Add server by ID",),
    ("Change favorite server",),
]
options = [
    ("List installed mods",),
    ("Toggle release branch",),
    ("Toggle mod install mode",),
    ("Toggle Steam/Flatpak",),
    ("Change player name",),
    ("Change Steam API key",),
    ("Change Battlemetrics API key",),
    ("Force update local mods",),
    ("Output system info to log file",)
]
help = [
    ("View changelog",),
    ("Show debug log",),
    ("Help file ⧉",),
    ("Report a bug ⧉",),
    ("Forum ⧉",),
    ("Sponsor ⧉",),
    ("Hall of fame ⧉",),
]
filters = {
    "1PP": True,
    "3PP": True,
    "Day": True,
    "Night": True,
    "Empty": False,
    "Full": False,
    "Low pop": True,
    "Non-ASCII": False,
    "Duplicate": False
}
side_buttons = [
    "Main menu",
    "Manage",
    "Options",
    "Help",
    "Exit"
]
status_tooltip = {
    "Server browser": "Used to browse the global server list",
    "My saved servers": "Browse your saved servers",
    "Quick-connect to favorite server": "Connect to your favorite server",
    "Recent servers": "Shows the last 10 servers you connected to",
    "Connect by IP": "Connect to a server by IP",
    "Connect by ID": "Connect to a server by Battlemetrics ID",
    "Add server by IP": "Add a server by IP",
    "Add server by ID": "Add a server by Battlemetrics ID",
    "Change favorite server": "Update your quick-connect server",
    "List installed mods": "Browse a list of locally-installed mods",
    "Toggle release branch": "Switch between stable and testing branches",
    "Toggle mod install mode": "Switch between manual and auto mod installation",
    "Toggle Steam/Flatpak": "Switch the preferred client to use for launching DayZ",
    "Change player name": "Update your in-game name (required by some servers)",
    "Change Steam API key": "Can be used if you revoked an old API key",
    "Change Battlemetrics API key": "Can be used if you revoked an old API key",
    "Force update local mods": "Attempts to update any local mods out of synch with remote versions (experimental)",
    "Output system info to log file": "Generates a system log for troubleshooting",
    "View changelog": "Opens the DZGUI changelog in a dialog window",
    "Show debug log": "Read the DZGUI log generated since startup",
    "Help file ⧉": "Opens the DZGUI documentation in a browser",
    "Report a bug ⧉": "Opens the DZGUI issue tracker in a browser",
    "Forum ⧉": "Opens the DZGUI discussion forum in a browser",
    "Sponsor ⧉": "Sponsor the developer of DZGUI",
    "Hall of fame ⧉": "A list of significant contributors and testers",
}


def format_distance(distance):
    if distance == "Unknown":
        distance = "| Distance: %s" %(distance)
    else:
        d = int(distance)
        formatted = f'{d:n}'
        distance = "| Distance: %s km" %(formatted)
    return distance


def set_surrounding_margins(widget, margin):
    widget.set_margin_top(margin)
    widget.set_margin_start(margin)
    widget.set_margin_end(margin)


def parse_modlist_rows(data):
    lines = data.stdout.splitlines()
    hits = len(lines)
    reader = csv.reader(lines, delimiter=delimiter)
    try:
        rows = [[row[0], row[1], row[2]] for row in reader if row]
    except IndexError:
        return 1
    for row in rows:
        modlist_store.append(row)
    return hits

def parse_log_rows(data):
    lines = data.stdout.splitlines()
    reader = csv.reader(lines, delimiter=delimiter)
    try:
        rows = [[row[0], row[1], row[2], row[3]] for row in reader if row]
    except IndexError:
        return 1
    for row in rows:
        log_store.append(row)

def parse_mod_rows(data):
    # GTK pads trailing zeroes on floats
    # https://stackoverflow.com/questions/26827434/gtk-cellrenderertext-with-format
    sum = 0
    lines = data.stdout.splitlines()
    hits = len(lines)
    reader = csv.reader(lines, delimiter=delimiter)
    try:
        rows = [[row[0], row[1], row[2], locale.atof(row[3], func=float)] for row in reader if row]
    except IndexError:
        return 1
    for row in rows:
        mod_store.append(row)
        size = float(row[3])
        sum += size
    return [sum, hits]


def parse_server_rows(data):
    sum = 0
    lines = data.stdout.splitlines()
    reader = csv.reader(lines, delimiter=delimiter)
    hits = len(lines)
    try:
        rows = [[row[0], row[1], row[2], row[3], int(row[4]), int(row[5]), row[6], int(row[7])] for row in reader if row]
    except IndexError:
        return 1
    for row in rows:
        server_store.append(row)
        players = int(row[4])
        sum += players
    return [sum, hits]


def query_config(widget, key=""):
    proc = call_out(widget, "query_config", key)
    config = list(proc.stdout.splitlines())
    return (config)


def call_out(widget, command, *args):
    if widget is not None:
        widget_name = widget.get_name()
        try:
            widget_name = widget_name.split('+')[1]
            match widget_name:
                case "TreeView":
                    context = widget.get_first_col()
                case "ScrollableTree":
                    context = widget.treeview.get_first_col()
                case "OuterWindow":
                    context = widget.grid.scrollable_treelist.treeview.get_first_col()
                case "Grid":
                    context = widget.scrollable_treelist.treeview.get_first_col()
        except IndexError:
            context = "Generic"
    else:
        context = "Generic"

    arg_ar = []
    for i in args:
        arg_ar.append(i)
    logger.info("Context '%s' calling subprocess '%s' with args '%s'" %(context, command, arg_ar))
    proc = subprocess.run(["/usr/bin/env", "bash", funcs, command] + arg_ar, capture_output=True, text=True)
    return proc


def spawn_dialog(transient_parent, msg, mode):
    dialog = GenericDialog(transient_parent, msg, mode)
    response = dialog.run()
    dialog.destroy()
    match response:
        case Gtk.ResponseType.OK:
            logger.info("User confirmed dialog with message '%s'" %(msg))
            return 0
        case Gtk.ResponseType.CANCEL | Gtk.ResponseType.DELETE_EVENT:
            logger.info("User aborted dialog with message '%s'" %(msg))
            return 1


def process_shell_return_code(transient_parent, msg, code, original_input):
    match code:
            #TODO: add logger output to each
        case 0:
            # success with notice popup
            spawn_dialog(transient_parent, msg, "NOTIFY")
            pass
        case 1:
            # error with notice popup
            if msg == "":
                msg = "Something went wrong"
            spawn_dialog(transient_parent, msg, "NOTIFY")
            pass
        case 2:
            # warn and recurse (e.g. validation failed)
            spawn_dialog(transient_parent, msg, "NOTIFY")
            treeview = transient_parent.grid.scrollable_treelist.treeview
            process_tree_option(original_input, treeview)
        case 4:
            # for BM only
            spawn_dialog(transient_parent, msg, "NOTIFY")
            treeview = transient_parent.grid.scrollable_treelist.treeview
            process_tree_option(["Options", "Change Battlemetrics API key"], treeview)
        case 5:
            # for steam only
            spawn_dialog(transient_parent, msg, "NOTIFY")
            treeview = transient_parent.grid.scrollable_treelist.treeview
            process_tree_option(["Options", "Change Steam API key"], treeview)
        case 6:
            # return silently
            pass
        case 90:
            # used to update configs and metadata in-place
            treeview = transient_parent.grid.scrollable_treelist.treeview
            col = treeview.get_column_at_index(0)
            config_vals.clear()
            for i in query_config(None):
                config_vals.append(i)
            tooltip = format_metadata(col)
            transient_parent.grid.update_statusbar(tooltip)
            spawn_dialog(transient_parent, msg, "NOTIFY")
            return
        case 100:
            # final handoff before launch
            final_conf = spawn_dialog(transient_parent, msg, "CONFIRM")
            treeview = transient_parent.grid.scrollable_treelist.treeview
            if final_conf == 1 or final_conf is None:
                return
            process_tree_option(["Handshake", ""], treeview)
        case 255:
            spawn_dialog(transient_parent, "Update complete. Please close DZGUI and restart.", "NOTIFY")
            Gtk.main_quit()


def process_tree_option(input, treeview):
    context = input[0]
    command = input[1]
    logger.info("Parsing tree option '%s' for the context '%s'" %(command, context))

    transient_parent = treeview.get_outer_window()
    toggle_contexts = ["Toggle mod install mode", "Toggle release branch", "Toggle Steam/Flatpak"]

    def call_on_thread(bool, subproc, msg, args):
        def _background(subproc, args, dialog):
            def _load():
                wait_dialog.destroy()
                msg = proc.stdout
                rc = proc.returncode
                logger.info("Subprocess returned code %s with message '%s'" %(rc, msg))
                process_shell_return_code(transient_parent, msg, rc, input)
            proc = call_out(transient_parent, subproc, args)
            GLib.idle_add(_load)
        if bool is True:
            wait_dialog = GenericDialog(transient_parent, msg, "WAIT")
            wait_dialog.show_all()
            thread = threading.Thread(target=_background, args=(subproc, args, wait_dialog))
            thread.start()
        else:
            # False is used to bypass wait dialogs
            proc = call_out(transient_parent, subproc, args)
            rc = proc.returncode
            msg = proc.stdout
            process_shell_return_code(transient_parent, msg, rc, input)


    match context:
        case "Help":
            if command == "View changelog":
                diag = ChangelogDialog(transient_parent, '', "Changelog -- content can be scrolled")
                diag.run()
                diag.destroy()
            else:
                # non-blocking subprocess
                subprocess.Popen(['/usr/bin/env', 'bash', funcs, "Open link", command])
        case "Handshake":
            call_on_thread(True, context, "Waiting for DayZ", command)
        case _:
            if command == "Output system info to log file":
                call_on_thread(True, "gen_log", "Generating log", "")
            elif command == "Force update local mods":
                call_on_thread(True, "force_update", "Updating mods", "")
            elif command == "Quick-connect to favorite server":
                call_on_thread(True, command, "Working", "")
            elif command in toggle_contexts:
                if command == "Toggle release branch":
                    call_on_thread(False, "toggle", "Updating DZGUI branch", command)
                else:
                    proc = call_out(transient_parent, "toggle", command)
                    grid = treeview.get_parent().get_parent()
                    grid.update_right_statusbar()
                    tooltip = format_metadata(command)
                    transient_parent.grid.update_statusbar(tooltip)
            else:
                # This branch is only used by interactive dialogs
                match command:
                    case "Connect by IP" | "Add server by IP" | "Change favorite server":
                        flag = True
                        link_label = ""
                        prompt = "Enter IP in IP:Queryport format\nE.g. 192.168.1.1:27016"
                    case "Connect by ID" | "Add server by ID":
                        flag = True
                        link_label = "Open Battlemetrics"
                        prompt = "Enter server ID"
                    case "Change player name":
                        flag = False
                        link_label = ""
                        prompt = "Enter new nickname"
                    case "Change Steam API key":
                        flag = True
                        link_label = "Open Steam API page"
                        prompt = "Enter new API key"
                    case "Change Battlemetrics API key":
                        flag = True
                        link_label = "Open Battlemetrics API page"
                        prompt = "Enter new API key"

                user_entry = EntryDialog(transient_parent, prompt, "ENTRY", link_label)
                res = user_entry.get_input()
                if res is None:
                    logger.info("User aborted entry dialog")
                    return
                logger.info("User entered: '%s'" %(res))

                call_on_thread(flag, command, "Working", res)


def reinit_checks():
    toggled_checks.clear()
    for check in checks:
        label = check.get_label()
        if filters[label] is True:
            check.set_active(True)
            toggled_checks.append(label)
        else:
            check.set_active(False)


class OuterWindow(Gtk.Window):
    def __init__(self, is_steam_deck):
        super().__init__()

        self.connect("destroy", self.halt_proc_and_quit)
        self.connect("delete-event", self.halt_proc_and_quit)
        # Deprecated in GTK 4.0
        self.set_border_width(10)
        self.set_type_hint(Gdk.WindowTypeHint.DIALOG)

        """
        app > win > grid > scrollable > treeview [row/server/mod store]
        app > win > grid > vbox > buttonbox > filterpanel > combo [map store]
        """
        self.grid = Grid(is_steam_deck)
        self.add(self.grid)
        self.hb = AppHeaderBar()
        self.set_titlebar(self.hb)

        # Hide FilterPanel on main menu
        self.show_all()
        self.grid.right_panel.set_filter_visibility(False)
        self.grid.scrollable_treelist.treeview.grab_focus()

    def halt_proc_and_quit(self, window):
        self.grid.terminate_treeview_process()
        Gtk.main_quit()


class ScrollableTree(Gtk.ScrolledWindow):
    def __init__(self, is_steam_deck):
        super().__init__()
        #self.set_propagate_natural_height(False)
        self.set_vexpand(False)

        self.treeview = TreeView(is_steam_deck)
        self.add(self.treeview)


class RightPanel(Gtk.Box):
    def __init__(self, is_steam_deck):
        super().__init__(spacing=6)
        self.set_orientation(Gtk.Orientation.VERTICAL)

        self.button_vbox = ButtonBox(is_steam_deck)
        self.filters_vbox = FilterPanel()
        toggle_signal(self.filters_vbox, self.filters_vbox.maps_combo, '_on_map_changed', False)

        self.pack_start(self.button_vbox, False, False, 0)
        self.pack_start(self.filters_vbox, False, False, 0)

        self.question_button = Gtk.Button(label="?")
        #TODO: too big on top
        self.question_button.set_margin_top(10)
        self.question_button.set_margin_start(50)
        self.question_button.set_margin_end(50)
#        set_surrounding_margins(self.question_label, 50)
        self.pack_start(self.question_button, False, True, 0)
        self.question_button.connect("clicked", self._on_button_clicked)

    def _on_button_clicked(self, button):
        grid = self.get_parent()
        grid.scrollable_treelist.treeview.spawn_keys_dialog(button)

    def set_filter_visibility(self, bool):
        self.filters_vbox.set_visible(bool)

    def focus_button_box(self):
        self.button_vbox.focus_button(0)

    def set_active_combo(self):
        self.filters_vbox.set_active_combo()


class ButtonBox(Gtk.Box):
    def __init__(self, is_steam_deck):
        super().__init__(spacing=6)
        self.set_orientation(Gtk.Orientation.VERTICAL)
        set_surrounding_margins(self, 10)

        self.buttons = list()
        for side_button in side_buttons:
            button = Gtk.Button(label=side_button)
            if is_steam_deck is True:
                button.set_size_request(10, 10)
            else:
                button.set_size_request(50,50)
            button.set_opacity(0.6)
            self.buttons.append(button)
            button.connect("clicked", self._on_selection_button_clicked)
            self.pack_start(button, False, False, True)

        self.buttons[0].set_opacity(1.0)

    def _update_single_column(self, context):
        logger.info("Returning from multi-column view to monocolumn view for the context '%s'" %(context))
        treeview = self.get_treeview()
        right_panel = self.get_parent()
        right_panel.set_filter_visibility(False)

        """Block maps combo when returning to main menu"""
        toggle_signal(right_panel.filters_vbox, right_panel.filters_vbox.maps_combo, '_on_map_changed', False)
        right_panel.filters_vbox.keyword_entry.set_text("")
        keyword_filter.clear()
        keyword_filter.append("Keyword␞")
        server_store.clear()

        for column in treeview.get_columns():
            treeview.remove_column(column)
        for i, column_title in enumerate([context]):
            renderer = Gtk.CellRendererText()
            column = Gtk.TreeViewColumn(column_title, renderer, text=i)
            treeview.append_column(column)
        treeview.set_model(row_store)
        treeview.grab_focus()

    def _populate(self, array_context):
        row_store.clear()
        status = array_context[0][0]
        treeview = self.get_treeview()
        grid = self.get_parent().get_parent()

        for items in array_context:
            row_store.append(list(items))
        grid.update_statusbar(status_tooltip[status])
        treeview.grab_focus()

    def _on_selection_button_clicked(self, button):
        treeview = self.get_treeview()
        toggle_signal(treeview, treeview.selected_row, '_on_tree_selection_changed', False)
        context = button.get_label()
        logger.info("User clicked '%s'" %(context))

        if context == "Exit":
            logger.info("Normal user exit")
            Gtk.main_quit()
        cols = treeview.get_columns()

        if len(cols) > 1:
            self._update_single_column(context)

        # Highlight the active widget
        for inactive_button in self.buttons:
            inactive_button.set_opacity(0.6)
        button.set_opacity(1.0)

        for col in cols:
            col.set_title(context)

        match context:
            case 'Manage': self._populate(manage)
            case 'Main menu': self._populate(connect)
            case 'Options': self._populate(options)
            case 'Help': self._populate(help)

        toggle_signal(treeview, treeview.selected_row, '_on_tree_selection_changed', True)

    def focus_button(self, index):
        self.buttons[index].grab_focus()

    def get_treeview(self):
        grid = self.get_parent().get_parent()
        treeview = grid.scrollable_treelist.treeview
        return treeview


class CalcDist(multiprocessing.Process):
    def __init__(self, widget, addr, result_queue, cache):
        super().__init__()

        self.widget = widget
        self.result_queue = result_queue
        self.addr = addr
        self.ip = addr.split(':')[0]

    def run(self):
        if self.addr in cache:
            logger.info("Address '%s' already in cache" %(self.addr))
            self.result_queue.put([self.addr, cache[self.addr]])
            return
        proc = call_out(self.widget, "get_dist", self.ip)
        km = proc.stdout
        self.result_queue.put([self.addr, km])


class TreeView(Gtk.TreeView):
    __gsignals__ = {"on_distcalc_started": (GObject.SignalFlags.RUN_FIRST, None, ())}

    def __init__(self, is_steam_deck):
        super().__init__()

        self.queue = multiprocessing.Queue()
        self.current_proc = None

        # Disables typeahead search
        self.set_enable_search(False)
        self.set_search_column(-1)

        # Populate model with initial context
        for rows in connect:
            row_store.append(list(rows))
        self.set_model(row_store)

        for i, column_title in enumerate(
            ["Main menu"]
        ):
            renderer = Gtk.CellRendererText()
            column = Gtk.TreeViewColumn(column_title, renderer, text=i)
            self.append_column(column)
            # TODO: change font size on the fly
            if is_steam_deck is True:
                renderer.set_property("size-points", 20)

        self.connect("row-activated", self._on_row_activated)
        self.connect("key-press-event", self._on_keypress)
        self.connect("key-press-event", self._on_keypress_main_menu)
        toggle_signal(self, self, '_on_keypress', False)

        self.selected_row = self.get_selection()
        self.selected_row.connect("changed", self._on_tree_selection_changed)
        self.connect("button-release-event", self._on_button_release)

    def terminate_process(self):
        if self.current_proc and self.current_proc.is_alive():
            self.current_proc.terminate()

    def _on_menu_click(self, menu_item):
        parent = self.get_outer_window()
        context = self.get_first_col()
        value = self.get_column_at_index(0)
        context_menu_label = menu_item.get_label()
        logger.info("User clicked context menu '%s'" %(context_menu_label))

        match context_menu_label:
            case "Add to my servers" | "Remove from favorites":
                record = "%s:%s" %(self.get_column_at_index(6), self.get_column_at_index(7))
                call_out(parent, context_menu_label, record)
                if context == "Name (My saved servers)":
                    iter = self.get_current_iter()
                    server_store.remove(iter)
                res = spawn_dialog(parent, "Added %s to favorites" %(record), "NOTIFY")
            case "Remove from history":
                record = "%s:%s" %(self.get_column_at_index(6), self.get_column_at_index(7))
                call_out(parent, context_menu_label, record)
                iter = self.get_current_iter()
                server_store.remove(iter)
            case "Copy IP to clipboard":
                self.clipboard = Gtk.Clipboard.get(Gdk.SELECTION_CLIPBOARD)
                addr = self.get_column_at_index(6)
                qport = self.get_column_at_index(7)
                ip = addr.split(':')[0]
                record = "%s:%s" %(ip, qport)
                self.clipboard.set_text(record, -1)
            case "Show server-side mods":
                record = "%s:%s" %(self.get_column_at_index(6), self.get_column_at_index(7))
                dialog = ModDialog(parent, "Enter/double click a row to open in Steam Workshop. ESC exits this dialog", "Modlist", record)
                modlist_store.clear()
            case "Delete mod":
                conf_msg = "Really delete the mod '%s'?" %(value)
                success_msg = "Successfully deleted the mod '%s'." %(value)
                fail_msg = "An error occurred during deletion. Aborting."
                res = spawn_dialog(parent, conf_msg, "CONFIRM")
                symlink = self.get_column_at_index(1)
                dir = self.get_column_at_index(2)
                if res == 0:
                    proc = call_out(parent, "delete", symlink, dir)
                    if proc.returncode == 0:
                        spawn_dialog(parent, success_msg, "NOTIFY")
                        self._update_quad_column("List installed mods")
                    else:
                        spawn_dialog(parent, fail_msg, "NOTIFY")
            case "Open in Steam Workshop":
                record = self.get_column_at_index(2)
                call_out(parent, "open_workshop_page", record)

    def _on_button_release(self, widget, event):
        try:
            pathinfo = self.get_path_at_pos(event.x, event.y)
            if pathinfo is None:
                return
            (path, col, cellx, celly) = pathinfo
            self.set_cursor(path,col,0)
        except AttributeError:
            pass

        if event.type is Gdk.EventType.BUTTON_RELEASE and event.button != 3:
            return
        context = self.get_first_col()
        self.menu = Gtk.Menu()

        mod_context_items = ["Open in Steam Workshop", "Delete mod"]
        subcontext_items = {"Server browser": ["Add to my servers", "Copy IP to clipboard", "Show server-side mods"],
                  "My saved servers": ["Remove from favorites", "Copy IP to clipboard", "Show server-side mods"],
                  "Recent servers": ["Remove from history", "Copy IP to clipboard", "Show server-side mods"],
                  }
        # submenu hierarchy https://stackoverflow.com/questions/52847909/how-to-add-a-sub-menu-to-a-gtk-menu
        if context == "Mod":
            items = mod_context_items
            subcontext = "List installed mods"
        elif "Name" in context:
            subcontext = context.split('(')[1].split(')')[0]
            items = subcontext_items[subcontext]
        else:
            return

        for item in items:
            if subcontext == "Server browser" and item == "Add to my servers":
                record = "%s:%s" %(self.get_column_at_index(6), self.get_column_at_index(7))
                proc = call_out(widget, "is_in_favs", record)
                if proc.returncode == 0:
                    item = "Remove from favorites"
            item = Gtk.MenuItem(label=item)
            item.connect("activate", self._on_menu_click)
            self.menu.append(item)

        self.menu.show_all()

        if event.type is Gdk.EventType.KEY_PRESS and event.keyval is Gdk.KEY_l:
            self.menu.popup_at_widget(widget, Gdk.Gravity.CENTER, Gdk.Gravity.WEST)
        else:
            self.menu.popup_at_pointer(event)

    def get_outer_window(self):
        win = self.get_parent().get_parent().get_parent()
        return win

    def get_outer_grid(self):
        grid = self.get_parent().get_parent()
        return grid

    def get_current_iter(self):
        iter = self.get_selection().get_selected()[1]
        return iter

    def get_current_index(self):
        index = treeview.get_selection().get_selected_rows()[1][0][0]
        return index

    def _on_tree_selection_changed(self, selection):
        grid = self.get_outer_grid()
        context = self.get_first_col()
        row_sel = self.get_column_at_index(0)
        if context == "Mod" or context == "Timestamp":
            return
        logger.info("Tree selection for context '%s' changed to '%s'" %(context, row_sel))

        if self.current_proc and self.current_proc.is_alive():
            self.current_proc.terminate()

        if "Name" in context:
            addr = self.get_column_at_index(6)
            if addr is None:
                return
            if addr in cache:
                dist = format_distance(cache[addr])

                tooltip = server_tooltip[0] + dist
                grid.update_statusbar(tooltip)
                return
            self.emit("on_distcalc_started")
            self.current_proc = CalcDist(self, addr, self.queue, cache)
            self.current_proc.start()
        elif None:
            return
        else:
            tooltip = format_metadata(row_sel)
            grid.update_statusbar(tooltip)

    def spawn_keys_dialog(self, widget):
        diag = KeysDialog(self.get_outer_window(), '', "Keybindings")
        diag.run()
        diag.destroy()
        self.grab_focus()

    def _on_keypress_main_menu(self, treeview, event):
        window = self.get_outer_window()
        grid = self.get_outer_grid()
        match event.keyval:
            case Gdk.KEY_Right:
                grid.right_panel.focus_button_box()
            case Gdk.KEY_question:
                if event.state is Gdk.ModifierType.SHIFT_MASK:
                    self.spawn_keys_dialog(None)
            case Gdk.KEY_f:
                if event.state is Gdk.ModifierType.CONTROL_MASK:
                    return True
            case _:
                return False

    def _on_keypress(self, treeview, event):
        if self.get_first_col == "Mod":
            return
        keyname = Gdk.keyval_name(event.keyval)
        grid = self.get_outer_grid()
        cur_proc = grid.scrollable_treelist.treeview.current_proc
        if event.state is Gdk.ModifierType.CONTROL_MASK:
            match event.keyval:
                case Gdk.KEY_d:
                    debug = grid.right_panel.filters_vbox.debug_toggle
                    if debug.get_active():
                        debug.set_active(False)
                    else:
                        debug.set_active(True)
                case Gdk.KEY_l:
                    self._on_button_release(self, event)
                case Gdk.KEY_f:
                    grid.right_panel.filters_vbox.grab_keyword_focus()
                case Gdk.KEY_m:
                    grid.right_panel.filters_vbox.maps_combo.grab_focus()
                    grid.right_panel.filters_vbox.maps_combo.popup()
                case _:
                    return False
        elif keyname.isnumeric() and int(keyname) > 0:
            digit = (int(keyname) - 1)
            grid.right_panel.filters_vbox.toggle_check(checks[digit])
        else:
            return False

    def get_column_at_index(self, index):
        select = self.get_selection()
        sels = select.get_selected_rows()
        (model, pathlist) = sels
        if len(pathlist) < 1:
            return
        path = pathlist[0]
        tree_iter = model.get_iter(path)
        value = model.get_value(tree_iter, index)
        return value

    def _background(self, dialog, mode):
        def loadTable():
            for map in maps:
                map_store.append([map])
            toggle_signal(self, self.selected_row, '_on_tree_selection_changed', True)
            right_panel.set_filter_visibility(True)
            dialog.destroy()
            self.grab_focus()

        grid = self.get_outer_grid()
        right_panel = grid.right_panel

        filters = toggled_checks + keyword_filter + selected_map
        data = call_out(self, "dump_servers", mode, *filters)

        toggle_signal(self, self.selected_row, '_on_tree_selection_changed', False)
        row_metadata = parse_server_rows(data)
        sum = row_metadata[0]
        hits = row_metadata[1]
        server_tooltip[0] = format_tooltip(sum, hits)
        grid.update_statusbar(server_tooltip[0])

        map_data = call_out(self, "get_unique_maps", mode)
        maps = map_data.stdout.splitlines()
        self.set_model(server_store)
        GLib.idle_add(loadTable)

    def _background_quad(self, dialog, mode):
        def load():
            dialog.destroy()
            self.set_model(mod_store)
            self.grab_focus()
            size = locale.format_string('%.3f', total_size, grouping=True)
            grid.update_statusbar("Found %s mods taking up %s MiB" %(f'{total_mods:n}', size))

        grid = self.get_outer_grid()
        right_panel = grid.right_panel

        right_panel.set_filter_visibility(False)
        data = call_out(self, "list_mods", mode)
        result = parse_mod_rows(data)
        total_size = result[0]
        total_mods = result[1]
        GLib.idle_add(load)

    def _update_multi_column(self, mode):
        # Local server lists may have different filter toggles from remote list
        # FIXME: tree selection updates twice here. attach signal later
        toggle_signal(self, self.selected_row, '_on_tree_selection_changed', False)
        # toggle_signal(self, self.selected_row, '_on_check_toggled', False)
        for column in self.get_columns():
            self.remove_column(column)
        row_store.clear()
        for i, column_title in enumerate(browser_cols):
            renderer = Gtk.CellRendererText()
            column = Gtk.TreeViewColumn(column_title, renderer, text=i)
            column.set_sort_column_id(i)
            #"""Prevent columns from auto-adjusting"""
            if ("Name" in column_title):
                column.set_fixed_width(800)
            #if (column_title == "Map"):
            #    column.set_fixed_width(300)
            self.append_column(column)

        self.update_first_col(mode)
        transient_parent = self.get_outer_window()

        for check in checks:
            toggle_signal(self.get_outer_grid().right_panel.filters_vbox, check, '_on_check_toggle', True)
        toggle_signal(self, self, '_on_keypress', True)

        wait_dialog = GenericDialog(transient_parent, "Fetching server metadata", "WAIT")
        wait_dialog.show_all()
        thread = threading.Thread(target=self._background, args=(wait_dialog, mode))
        thread.start()

    def update_first_col(self, title):
        for col in self.get_columns():
            old_title = col.get_title()
            col.set_title("%s (%s)" %(old_title, title))
            break

    def get_first_col(self):
        for col in self.get_columns():
            cur_col = col.get_title()
            break
        return cur_col

    def _format_float(self, column, cell, model, iter, data):
        # https://docs.huihoo.com/pygtk/2.0-tutorial/sec-CellRenderers.html
        val = model[iter][3]
        formatted = locale.format_string('%.3f', val, grouping=True)
        cell.set_property('text', formatted)
        return

    def _update_quad_column(self, mode):
        # toggle_signal(self, self.selected_row, '_on_tree_selection_changed', False)
        for column in self.get_columns():
            self.remove_column(column)

        mod_store.clear()
        log_store.clear()

        if mode == "List installed mods":
            cols = mod_cols
            self.set_model(mod_store)
        else:
            cols = log_cols
            self.set_model(log_store)

        for i, column_title in enumerate(cols):
            renderer = Gtk.CellRendererText()
            column = Gtk.TreeViewColumn(column_title, renderer, text=i)
            if mode == "List installed mods":
                if i == 3:
                    column.set_cell_data_func(renderer, self._format_float, func_data=None)
            column.set_sort_column_id(i)
            #if (column_title == "Name"):
            #    column.set_fixed_width(600)
            self.append_column(column)

        if mode == "List installed mods":
            pass
        else:
            data = call_out(self, "show_log")
            res = parse_log_rows(data)
            if res == 1:
                spawn_dialog(self.get_outer_window(), "Failed to load log file, possibly corrupted", "NOTIFY")
            return

        transient_parent = self.get_outer_window()

        wait_dialog = GenericDialog(transient_parent, "Checking mods", "WAIT")
        wait_dialog.show_all()
        thread = threading.Thread(target=self._background_quad, args=(wait_dialog, mode))
        thread.start()

    def _background_connection(self, dialog, record):
        def load():
            dialog.destroy()
            transient = self.get_outer_window()
            process_shell_return_code(transient, proc.stdout, proc.returncode, record)

        proc = call_out(self, "Connect from table", record)
        GLib.idle_add(load)


    def _attempt_connection(self):
        transient_parent = self.get_outer_window()
        addr = self.get_column_at_index(6)
        qport = self.get_column_at_index(7)
        record = "%s:%s" %(addr, str(qport))

        wait_dialog = GenericDialog(transient_parent, "Querying server and aligning mods", "WAIT")
        wait_dialog.show_all()
        thread = threading.Thread(target=self._background_connection, args=(wait_dialog, record))
        thread.start()

    def _on_row_activated(self, treeview, tree_iter, col):
        context = self.get_first_col()
        chosen_row = self.get_column_at_index(0)
        output = context, chosen_row
        if context == "Mod" or context == "Timestamp":
            return
        logger.info("User selected '%s' for the context '%s'" %(chosen_row, context))

        outer = self.get_outer_window()
        right_panel = outer.grid.right_panel
        filters_vbox = right_panel.filters_vbox

        valid_contexts = ["Server browser", "My saved servers", "Recent servers"]
        if chosen_row in valid_contexts:
            # server contexts share the same model type
            for check in checks:
                toggle_signal(filters_vbox, check, '_on_check_toggle', False)

            if chosen_row == "Server browser":
                reinit_checks()
            else:
                for check in checks:
                    if check.get_label() not in toggled_checks:
                        toggled_checks.append(check.get_label())
                        check.set_active(True)
            self._update_multi_column(chosen_row)

            map_store.clear()
            map_store.append(["All maps"])
            right_panel.set_active_combo()

            toggle_signal(filters_vbox, filters_vbox.maps_combo, '_on_map_changed', True)
            toggle_signal(self, self.selected_row, '_on_tree_selection_changed', True)
            self.grab_focus()
        elif chosen_row == "List installed mods" or chosen_row == "Show debug log":
            toggle_signal(self, self.selected_row, '_on_tree_selection_changed', False)
            self._update_quad_column(chosen_row)
            toggle_signal(self, self.selected_row, '_on_tree_selection_changed', True)
        elif any(map(context.__contains__, valid_contexts)):
            # implies activated row on any server list subcontext
            self._attempt_connection()
        else:
            # implies any other non-server option selected from main menu
            process_tree_option(output, self)


def format_metadata(row_sel):
    prefix = status_tooltip[row_sel]
    vals = {
            "branch": config_vals[0],
            "debug": config_vals[1],
            "auto_install": config_vals[2],
            "name": config_vals[3],
            "fav_label": config_vals[4],
            "preferred_client": config_vals[5]
            }
    match row_sel:
        case "Quick-connect to favorite server" | "Change favorite server":
            default = "unset"
            val = "fav_label"
        case "Change player name":
            val = "name"
        case "Toggle mod install mode":
            default = "manual"
            alt = "auto"
            val = "auto_install"
        case "Toggle debug mode":
            default = "normal"
            alt = "debug"
            val = "debug"
        case "Toggle release branch":
            val = "branch"
        case "Toggle Steam/Flatpak":
            val = "preferred_client"
        case _:
            return prefix

    try:
        cur_val = vals[val]
        if cur_val == "":
            return "%s | Current: %s" %(prefix, default)
        # TODO: migrate to human readable config values
        elif cur_val == "1":
            return "%s | Current: %s" %(prefix, alt)
        else:
            return "%s | Current: '%s'" %(prefix, cur_val)
    except KeyError:
        return prefix


def format_tooltip(sum, hits):
    if hits == 1:
        hit_suffix = "match"
    else:
        hit_suffix = "matches"
    if sum == 1:
        player_suffix = "player"
    else:
        player_suffix = "players"
    tooltip = "Found %s %s with %s %s" %(f'{hits:n}', hit_suffix, f'{sum:n}', player_suffix)
    return tooltip


def filter_servers(transient_parent, filters_vbox, treeview, context):
    def filter(dialog):
        def clear_and_destroy():
            row_metadata = parse_server_rows(data)
            sum = row_metadata[0]
            hits = row_metadata[1]
            server_tooltip[0] = format_tooltip(sum, hits)
            transient_parent.grid.update_statusbar(server_tooltip[0])

            toggle_signal(treeview, treeview.selected_row, '_on_tree_selection_changed', True)
            toggle_signal(filters_vbox, filters_vbox, '_on_button_release', True)
            toggle_signal(filters_vbox, filters_vbox.maps_combo, '_on_map_changed', True)
            dialog.destroy()
            treeview.grab_focus()

        server_filters = toggled_checks + keyword_filter + selected_map
        data = call_out(transient_parent, "filter", context, *server_filters)
        GLib.idle_add(clear_and_destroy)

    # block additional input on FilterPanel while filters are running
    toggle_signal(treeview, treeview.selected_row, '_on_tree_selection_changed', False)
    toggle_signal(filters_vbox, filters_vbox, '_on_button_release', False)
    toggle_signal(filters_vbox, filters_vbox.maps_combo, '_on_map_changed', False)

    dialog = GenericDialog(transient_parent, "Filtering results", "WAIT")
    dialog.show_all()
    server_store.clear()

    thread = threading.Thread(target=filter, args=(dialog,))
    thread.start()


class AppHeaderBar(Gtk.HeaderBar):
    def __init__(self):
        super().__init__()
        Gtk.HeaderBar()
        self.props.title = app_name
        self.set_show_close_button(True)


class NewsHeader(Gtk.Box):
    def __init__(self, news):
        super().__init__()
        Gtk.Box(spacing=1)
        self.set_valign(Gtk.Align.START)
        news_label = Gtk.Label(label=news)
        news_label.set_ellipsize(Pango.EllipsizeMode.END)
        self.pack_start(news_label, False, False, 0)


class GenericDialog(Gtk.MessageDialog):
    def __init__(self, parent, text, mode):

        def _on_dialog_delete(self, response_id):
            """Passively ignore user-input"""
            return True

        match mode:
            case "WAIT":
                dialog_type = Gtk.MessageType.INFO
                button_type = Gtk.ButtonsType.NONE
                header_text = "Please wait"
            case "NOTIFY":
                dialog_type = Gtk.MessageType.INFO
                button_type = Gtk.ButtonsType.OK
                header_text = "Notice"
            case "CONFIRM":
                dialog_type = Gtk.MessageType.QUESTION
                button_type = Gtk.ButtonsType.OK_CANCEL
                header_text = "Confirmation"
            case "ENTRY":
                dialog_type = Gtk.MessageType.QUESTION
                button_type = Gtk.ButtonsType.OK_CANCEL
                header_text = "User input required"
            case _:
                dialog_type = Gtk.MessageType.INFO
                button_type = Gtk.ButtonsType.OK
                header_text = mode

        Gtk.MessageDialog.__init__(
            self,
            transient_for=parent,
            flags=0,
            message_type=dialog_type,
            text=header_text,
            secondary_text=text,
            buttons=button_type,
            title=app_name,
            modal=True,
        )

        if mode == "WAIT":
            dialogBox = self.get_content_area()
            spinner = Gtk.Spinner()
            dialogBox.pack_end(spinner, False, False, 0)
            spinner.start()
            self.connect("delete-event", _on_dialog_delete)

        self.set_default_response(Gtk.ResponseType.OK)
        self.set_size_request(500, 0)
        self.set_position(Gtk.WindowPosition.CENTER_ON_PARENT)

    def update_label(self, text):
        self.format_secondary_text(text)


def ChangelogDialog(parent, text, mode):

    dialog = GenericDialog(parent, text, mode)
    dialogBox = dialog.get_content_area()
    dialog.set_default_response(Gtk.ResponseType.OK)
    dialog.set_size_request(1000, 600)

    with open(changelog_path, 'r') as f:
        changelog = f.read()

    scrollable = Gtk.ScrolledWindow()
    label = Gtk.Label()
    label.set_markup(changelog)
    scrollable.add(label)
    dialogBox.pack_end(scrollable, True, True, 0)
    set_surrounding_margins(dialogBox, 30)

    dialog.show_all()
    return dialog


def KeysDialog(parent, text, mode):

    dialog = GenericDialog(parent, text, mode)
    dialogBox = dialog.get_content_area()
    dialog.set_default_response(Gtk.ResponseType.OK)
    dialog.set_size_request(700, 0)

    keybindings = """
    <b>Basic navigation</b>
    Ctrl-q: quit
    Enter/Space/Double click: select row item
    Up, Down: navigate through row items
    ?: open this dialog

    <b>Button navigation</b>
    Right: jump from main view to side buttons
    Left: jump from side buttons to main view
    Up, Down: navigate up and down through side buttons
    Tab, Shift-Tab: navigate forward/back through menu elements

    <b>Any server browsing context</b>
    Enter/Space/Double click: connect to server
    Right-click on row/Ctrl-l: displays additional context menus
    Ctrl-f: jump to keyword field
    Ctrl-m: jump to maps dropdown
    Ctrl-d: toggle dry run (debug) mode
    1-9: toggle filter ON/OFF
    ESC: jump back to main view from keyword/maps
    """

    label = Gtk.Label()
    label.set_markup(keybindings)
    dialogBox.pack_end(label, False, False, 0)
    dialog.show_all()
    return dialog


class ModDialog(GenericDialog):
    def __init__(self, parent, text, mode, record):
        super().__init__(parent, text, mode)

        dialogBox = self.get_content_area()
        self.set_default_response(Gtk.ResponseType.OK)
        self.set_size_request(800, 500)

        self.scrollable = Gtk.ScrolledWindow()
        self.view = Gtk.TreeView()
        self.scrollable.set_vexpand(True)
        self.scrollable.add(self.view)
        set_surrounding_margins(self.scrollable, 20)

        self.view.connect("row-activated", self._on_row_activated)

        for i, column_title in enumerate(
            ["Mod", "ID", "Installed"]
        ):
            renderer = Gtk.CellRendererText()
            column = Gtk.TreeViewColumn(column_title, renderer, text=i)
            self.view.append_column(column)
            column.set_sort_column_id(i)
        dialogBox.pack_end(self.scrollable, True, True, 0)

        wait_dialog = GenericDialog(parent, "Fetching modlist", "WAIT")
        wait_dialog.show_all()
        thread = threading.Thread(target=self._background, args=(wait_dialog, parent, record))
        thread.start()

    def _background(self, dialog, parent, record):
        def _load():
            dialog.destroy()
            if data.returncode == 1:
                spawn_dialog(parent, "Server has no mods installed", "NOTIFY")
                return
            self.show_all()
            self.set_markup("Modlist (%s mods)" %(mod_count))
            res = self.run()
            self.destroy()

        addr = record.split(':')
        ip = addr[0]
        qport = addr[2]
        data = call_out(parent, "show_server_modlist", ip, qport)
        mod_count = parse_modlist_rows(data)
        self.view.set_model(modlist_store)
        GLib.idle_add(_load)

    def popup(self):
        pass

    def _on_row_activated(self, treeview, tree_iter, col):
        select = treeview.get_selection()
        sels = select.get_selected_rows()
        (model, pathlist) = sels
        if len(pathlist) < 1:
            return
        path = pathlist[0]
        tree_iter = model.get_iter(path)
        mod_id = model.get_value(tree_iter, 1)
        subprocess.Popen(['/usr/bin/env', 'bash', funcs, "open_workshop_page", mod_id])

class EntryDialog(GenericDialog):
    def __init__(self, parent, text, mode, link):
        super().__init__(parent, text, mode)

        """ Returns user input as a string or None """
        """ If user does not input text it returns None, NOT AN EMPTY STRING. """

        self.dialog = GenericDialog(parent, text, mode)
        self.dialogBox = self.dialog.get_content_area()
        self.dialog.set_default_response(Gtk.ResponseType.OK)
        self.dialog.set_size_request(500, 0)

        self.userEntry = Gtk.Entry()
        set_surrounding_margins(self.userEntry, 20)
        self.userEntry.set_margin_top(0)
        self.userEntry.set_size_request(250, 0)
        self.userEntry.set_activates_default(True)
        self.dialogBox.pack_start(self.userEntry, False, False, 0)

        if link != "":
            button = Gtk.Button(label=link)
            button.set_margin_start(60)
            button.set_margin_end(60)
            button.connect("clicked", self._on_button_clicked)
            self.dialogBox.pack_end(button, False, False, 0)

    def _on_button_clicked(self, button):
        label = button.get_label()
        subprocess.Popen(['/usr/bin/env', 'bash', funcs, "Open link", label])

    def get_input(self):
        self.dialog.show_all()
        response = self.dialog.run()
        text = self.userEntry.get_text()
        self.dialog.destroy()
        if (response == Gtk.ResponseType.OK) and (text != ''):
            return text
        else:
            return None


class Grid(Gtk.Grid):
    def __init__(self, is_steam_deck):
        super().__init__()
        self.set_column_homogeneous(True)
        #self.set_row_homogeneous(True)

        _news = sys.argv[2]
        self._version = "%s %s" %(app_name, sys.argv[3])

        if _news != "null":
            self.news = NewsHeader(_news)
            self.attach(self.news, 0, -1, 8, 10)

        self.scrollable_treelist = ScrollableTree(is_steam_deck)
        if is_steam_deck is True:
            self.scrollable_treelist.set_hexpand(False)
            self.scrollable_treelist.set_vexpand(False)
        else:
            self.scrollable_treelist.set_hexpand(True)
            self.scrollable_treelist.set_vexpand(True)

        self.right_panel = RightPanel(is_steam_deck)


        self.bar = Gtk.Statusbar()
        self.scrollable_treelist.treeview.connect("on_distcalc_started", self._on_calclat_started)

        GLib.timeout_add(200, self._check_result_queue)

        self.update_statusbar(default_tooltip)
        self.status_right_label = Gtk.Label(label="")
        self.bar.add(self.status_right_label)
        self.update_right_statusbar()

        if is_steam_deck is True:
            self.attach(self.scrollable_treelist, 0, 0, 5, 3)
            self.attach_next_to(self.bar, self.scrollable_treelist, Gtk.PositionType.BOTTOM, 5, 1)
            self.attach_next_to(self.right_panel, self.scrollable_treelist, Gtk.PositionType.RIGHT, 3, 1)
        else:
            self.attach(self.scrollable_treelist, 0, 0, 7, 5)
            self.attach_next_to(self.bar, self.scrollable_treelist, Gtk.PositionType.BOTTOM, 7, 1)
            self.attach_next_to(self.right_panel, self.scrollable_treelist, Gtk.PositionType.RIGHT, 1, 1)

    def update_right_statusbar(self):
        config_vals.clear()
        for i in query_config(self):
            config_vals.append(i)
        _branch = config_vals[0]
        _branch = _branch.upper()
        _debug = config_vals[1]
        if _debug == "":
            _debug = "NORMAL"
        else:
            _debug = "DEBUG"
        concat_label = "%s | %s | %s" %(_branch, _debug, self._version)
        self.status_right_label.set_text(concat_label)

    def terminate_treeview_process(self):
        self.scrollable_treelist.treeview.terminate_process()

    def _on_calclat_started(self, treeview):
        server_tooltip[1] = server_tooltip[0] + "| Distance: calculating..."
        self.update_statusbar(server_tooltip[1])

    def _check_result_queue(self):
        latest_result = None
        result_queue = self.scrollable_treelist.treeview.queue
        while not result_queue.empty():
            latest_result = result_queue.get()

        if latest_result is not None:
            addr = latest_result[0]
            km = latest_result[1]
            cache[addr] = km
            dist = format_distance(km)
            tooltip = server_tooltip[1] = server_tooltip[0] + dist
            self.update_statusbar(tooltip)

        return True

    def update_statusbar(self, string):
        meta = self.bar.get_context_id("Statusbar")
        self.bar.push(meta, string)


def toggle_signal(owner, widget, func_name, bool):
    func = getattr(owner, func_name)
    if (bool):
        logger.debug("Unblocking %s for %s" %(func_name, widget))
        widget.handler_unblock_by_func(func)
    else:
        logger.debug("Blocking %s for %s" %(func_name, widget))
        widget.handler_block_by_func(func)


class App(Gtk.Application):
    def __init__(self):

        _isd = int(sys.argv[4])
        if _isd == 1:
            is_steam_deck = True
        else:
            is_steam_deck = False

        self.win = OuterWindow(is_steam_deck)

        if is_steam_deck == 1:
            self.win.fullscreen()

        accel = Gtk.AccelGroup()
        accel.connect(Gdk.KEY_q, Gdk.ModifierType.CONTROL_MASK, Gtk.AccelFlags.VISIBLE, self._halt_window_subprocess)
        self.win.add_accel_group(accel)

        GLib.unix_signal_add(GLib.PRIORITY_DEFAULT, signal.SIGINT, Gtk.main_quit)
        Gtk.main()

    def _halt_window_subprocess(self, accel_group, window, code, flag):
        self.win.halt_proc_and_quit(self)


class FilterPanel(Gtk.Box):
    def __init__(self):
        super().__init__(spacing=6)

        for check in filters.keys():
            checkbutton = Gtk.CheckButton(label=check)
            label = checkbutton.get_children()

            label[0].set_ellipsize(Pango.EllipsizeMode.END)
            if filters[check] is True:
                checkbutton.set_active(True)
                toggled_checks.append(check)
            checkbutton.connect("toggled", self._on_check_toggle)
            checks.append(checkbutton)

        self.connect("button-release-event", self._on_button_release)
        self.set_orientation(Gtk.Orientation.VERTICAL)
        set_surrounding_margins(self, 10)

        self.filters_label = Gtk.Label(label="Filters")

        self.keyword_entry = Gtk.Entry()
        self.keyword_entry.set_placeholder_text("Filter by keyword")
        self.keyword_entry.connect("activate", self._on_keyword_enter)
        self.keyword_entry.connect("key-press-event", self._on_esc_pressed)

        renderer_text = Gtk.CellRendererText(ellipsize=Pango.EllipsizeMode.END)
        self.maps_combo = Gtk.ComboBox.new_with_model(map_store)
        self.maps_combo.pack_start(renderer_text, True)
        self.maps_combo.add_attribute(renderer_text, "text", 0)
        self.maps_combo.connect("changed", self._on_map_changed)
        self.maps_combo.connect("key-press-event", self._on_esc_pressed)

        self.debug_toggle = Gtk.ToggleButton(label="Debug mode")
        self.debug_toggle.connect("toggled", self._on_button_toggled, "Toggle debug mode")
        set_surrounding_margins(self.debug_toggle, 10)

        self.pack_start(self.filters_label, False, False, True)
        self.pack_start(self.keyword_entry, False, False, True)
        self.pack_start(self.maps_combo, False, False, True)

        for i, check in enumerate(checks[0:]):
            self.pack_start(checks[i], False, False, True)

        self.pack_start(self.debug_toggle, False, False, 0)

    def _on_button_toggled(self, button, command):
        transient_parent = self.get_outer_window()
        grid = self.get_outer_grid()
        call_out(transient_parent, "toggle", command)
        grid.update_right_statusbar()
        grid.scrollable_treelist.treeview.grab_focus()

    def grab_keyword_focus(self):
        self.keyword_entry.grab_focus()

    def restore_focus_to_treeview(self):
        grid = self.get_outer_grid()
        grid.scrollable_treelist.treeview.grab_focus()
        return False

    def _on_esc_pressed(self, entry, event):
        keyname = Gdk.keyval_name(event.keyval)
        if keyname == "Escape":
            GLib.idle_add(self.restore_focus_to_treeview)

    def get_outer_grid(self):
        panel = self.get_parent()
        grid = panel.get_parent()
        return grid

    def get_outer_window(self):
        grid = self.get_outer_grid()
        outer_window = grid.get_parent()
        return outer_window

    def _on_keyword_enter(self, keyword_entry):
        win = self.get_outer_window()
        win.set_keep_below(False)
        keyword = keyword_entry.get_text()
        old_keyword = keyword_filter[0].split(delimiter)[1]
        if keyword == old_keyword:
            return
        logger.info("User filtered by keyword '%s'" %(keyword))
        keyword_filter.clear()
        keyword_filter.append("Keyword␞" + keyword)
        transient_parent = self.get_outer_window()
        grid = self.get_outer_grid()
        treeview = grid.scrollable_treelist.treeview
        context = grid.scrollable_treelist.treeview.get_first_col()
        filter_servers(transient_parent, self, treeview, context)

    def _on_button_release(self, window, button):
        return True

    def set_active_combo(self):
        self.maps_combo.set_active(0)

    def toggle_check(self, button):
        if button.get_active():
            button.set_active(False)
        else:
            button.set_active(True)

    def _on_check_toggle(self, button):
        grid = self.get_outer_grid()
        treeview = grid.scrollable_treelist.treeview
        context = grid.scrollable_treelist.treeview.get_first_col()
        label = button.get_label()
        state = button.get_active()

        if context == "Mod":
            return
        if state is True:
            toggled_checks.append(label)
        else:
            toggled_checks.remove(label)

        logger.info("User toggled button '%s' to %s" %(label, state))
        transient_parent = self.get_outer_window()
        filter_servers(transient_parent, self, treeview, context)

    def _on_map_changed(self, combo):
        grid = self.get_outer_grid()
        transient_parent = self.get_outer_window()
        treeview = grid.scrollable_treelist.treeview
        context = grid.scrollable_treelist.treeview.get_first_col()

        tree_iter = combo.get_active_iter()
        if tree_iter is not None:
            selected_map.clear()
            model = combo.get_model()
            selection = model[tree_iter][0]
            selected_map.append("Map=" + selection)
            logger.info("User selected map '%s'" %(selection))
            filter_servers(transient_parent, self, treeview, context)


def main():

    def usage():
        text = "UI constructor must be run via DZGUI"
        logger.critical(text)
        print(text)
        sys.exit(1)

    expected_flag = "--init-ui"
    if len(sys.argv) < 2:
        usage()
    if sys.argv[1] != expected_flag:
        usage()

    logger.info("Spawned UI from DZGUI setup process")
    App()


if __name__ == '__main__':
    main()