/* -*- mode: js; js-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
  Monito Gnome-Shell extension
  Copyright (C) 2021  Benjamin Drieu

  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.

  SPDX-License-Identifier: GPL-2.0-or-later
*/

const Gio = imports.gi.Gio;
const GLib = imports.gi.GLib;
const Gtk = imports.gi.Gtk;
const Gdk = imports.gi.Gdk;

// It's common practice to keep GNOME API and JS imports in separate blocks
const Lang = imports.lang;
const ExtensionUtils = imports.misc.extensionUtils;
const Me = ExtensionUtils.getCurrentExtension();
const Convenience = Me.imports.convenience;
const Mainloop = imports.mainloop;

const Gettext = imports.gettext.domain('monito');
const _ = Gettext.gettext;
const N_ = function (e) {
    return e;
};

const SETTINGS_SCHEMA = "org.gnome.shell.extensions.monito";
const SETTINGS_SCHEMA_ACCOUNT = "org.gnome.shell.extensions.monito.account";
const SETTINGS_SCHEMA_ACCOUNT_PATH = "/org/gnome/shell/extensions/monito/account";


const prefs = [
    { type: Gtk.Entry,		category: 'Settings',           label: _('Name'),                               key: 'name' },
    { type: Gtk.ComboBoxText,	category: 'Settings',           label: _('Type'),                               key: 'type' },
    { type: Gtk.Entry,		category: 'Settings',           label: _('Username'),                           key: 'username' },
    { type: Gtk.Entry,		category: 'Settings',           label: _('Password'),                           key: 'password' },
    { type: Gtk.Entry,		category: 'Settings',           label: _('URL CGI'),                            key: 'urlcgi' },
    { type: Gtk.ColorButton,	category: 'Colors',             label: _('OK background color'),                key: 'ok-color', align: Gtk.Align.START },
    { type: Gtk.ColorButton,	category: 'Colors',             label: _('Warning background color'),           key: 'warning-color', align: Gtk.Align.START },
    { type: Gtk.ColorButton,	category: 'Colors',             label: _('Critical background color'),          key: 'critical-color', align: Gtk.Align.START },
    { type: Gtk.ColorButton,	category: 'Colors',             label: _('Unknown background color'),           key: 'unknown-color', align: Gtk.Align.START },
    { type: Gtk.ColorButton,	category: 'Colors',             label: _('OK color'),                           key: 'ok-fg', align: Gtk.Align.START },
    { type: Gtk.ColorButton,	category: 'Colors',             label: _('Warning color'),                      key: 'warning-fg', align: Gtk.Align.START },
    { type: Gtk.ColorButton,	category: 'Colors',             label: _('Critical color'),                     key: 'critical-fg', align: Gtk.Align.START },
    { type: Gtk.ColorButton,	category: 'Colors',             label: _('Unknown color'),                      key: 'unknown-fg', align: Gtk.Align.START },
    { type: Gtk.Entry,          category: 'Filters',            label: _('Only display hosts matching'),        key: 'host-grep' },
    { type: Gtk.Entry,          category: 'Filters',            label: _('Only display services matching'),     key: 'service-grep' },
    { type: Gtk.Entry,          category: 'Filters',            label: _('Only display status info matching'),     key: 'status-info-grep' },
    { type: Gtk.Entry,          category: 'Filters',            label: _('Do <b>not</b> display hosts matching'),      key: 'host-filter-out' },
    { type: Gtk.Entry,          category: 'Filters',            label: _('Do <b>not</b> display services matching'),   key: 'service-filter-out' },
    { type: Gtk.Entry,          category: 'Filters',            label: _('Do <b>not</b> display status info matching'),      key: 'status-info-filter-out' },
    { type: Gtk.Entry,          category: 'Replacements',       label: _('Host regexp ...'),              key: 'host-match' },
    { type: Gtk.Entry,          category: 'Replacements',       label: _('... to replace with'),                key: 'host-replace' },
    { type: Gtk.Entry,          category: 'Replacements',       label: _('Service regexp ...'),           key: 'service-match' },
    { type: Gtk.Entry,          category: 'Replacements',       label: _('... to replace with'),                key: 'service-replace' },
    { type: Gtk.Entry,          category: 'Replacements',       label: _('Status info regexp ...'),	key: 'status-info-match' },
    { type: Gtk.Entry,          category: 'Replacements',       label: _('... to replace with'),                key: 'status-info-replace' },
];


// Like 'extension.js' this is used for any one-time setup like translations.
function init() {
    monitoLog('initializing ${Me.metadata.name} Preferences');
    this.settings = ExtensionUtils.getSettings(SETTINGS_SCHEMA);
    monitoLog ( 'Foo: ' + Me.metadata );
}


// This function is called when the preferences window is first created to build
// and return a Gtk widget. As an example we'll create and return a GtkLabel.
function buildPrefsWidget() {

    // Copy the same GSettings code from `extension.js`
    this.settings = ExtensionUtils.getSettings(SETTINGS_SCHEMA);

    let mainVbox = new Gtk.Box( { orientation: Gtk.Orientation.VERTICAL } );

    let mainWidget = new Gtk.Notebook( { } );

    let prefsWidget = new Gtk.Grid({
        margin: 18,
        column_spacing: 12,
        row_spacing: 12,
	column_homogeneous: false,
    });

    this.prefWidgets = { };

    // Add a simple title and add it to the prefsWidget
    let title = new Gtk.Label({
        label: `<b>${Me.metadata.name} Preferences</b>`,
        halign: Gtk.Align.START,
        use_markup: true,
    });
    prefsWidget.attach(title, 0, 0, 2, 1);

    let _label = new Gtk.Label({
        label: 'Poll delay in seconds',
        visible: true,
        halign: Gtk.Align.START,
    });
    prefsWidget.attach ( _label, 0, 1, 1, 1 );

    let _entry = new Gtk.SpinButton ({
        numeric: true,
        halign: Gtk.Align.FILL,
        visible: true,
	hexpand: true,
        can_focus: true,
    });
    _entry.set_range ( 1, 1000 );
    _entry.set_increments ( 1, 5 );
    prefsWidget.attach ( _entry, 1, 1, 1, 1 );
    this.settings.bind ( 'poll-delay', _entry, 'value', Gio.SettingsBindFlags.DEFAULT );

    // Misc Settings (TBD)
    mainWidget.append_page ( prefsWidget,
			     new Gtk.Label ( { label: 'General', } ) );


    // Accounts 
    this._accountsWidgetContainer = new Gtk.Box( { orientation: Gtk.Orientation.HORIZONTAL,
						 homogeneous: false, } );
    mainWidget.append_page ( this._accountsWidgetContainer,
			     new Gtk.Label ( { label: 'Servers', } ) );

    let accountsChooserContainer = new Gtk.Box( { orientation: Gtk.Orientation.VERTICAL,
						  homogeneous: false, } );
    this._accountsWidgetContainer.pack_start(accountsChooserContainer, true, true, 0);

    this.accountsChooser = new Gtk.ListBox ( { valign: Gtk.Align.FILL,
					      hexpand: true,
					      vexpand: true } );
    accountsChooserContainer.pack_start(this.accountsChooser, true, true, 0);

    // Account list
    for ( var server_id of this.getServersList ( ) )
        this.addAccountLine ( server_id );
    this.accountsChooser.connect ( 'row-activated', Lang.bind ( this, this.activateAccountRow ) );

    // Action Bar
    let accountsChooserActionBar = new Gtk.ActionBar ( { valign: Gtk.Align.END } );
    accountsChooserContainer.pack_start(accountsChooserActionBar, true, true, 0);

    let accountCreateButton = Gtk.Button.new_from_icon_name ( 'list-add',
                                                              Gtk.IconSize.BUTTON );
    accountsChooserActionBar.add ( accountCreateButton );
    accountCreateButton.connect ( 'clicked', Lang.bind ( this, this.createAccount ) );

    let accountRemoveButton = Gtk.Button.new_from_icon_name ( 'list-remove',
                                                              Gtk.IconSize.BUTTON );
    accountsChooserActionBar.add ( accountRemoveButton );
    accountRemoveButton.connect ( 'clicked', Lang.bind ( this, this.removeAccount ) );

    this.createAccountWidgets ( false ) ;

    mainVbox.pack_start(mainWidget, true, true, 0);
    mainVbox.show_all();

    return mainVbox;
}


function getServersList ( )
{
    if ( ! this.settings )
        this.settings = ExtensionUtils.getSettings(SETTINGS_SCHEMA);

    return this.settings.get_string ( 'servers' ) . split ( ',' );
}


function getAccountSettings ( id )
{
    let _path = SETTINGS_SCHEMA_ACCOUNT_PATH + '/' + id + '/';
    return Convenience.getSettings(SETTINGS_SCHEMA_ACCOUNT, _path);
}


function getSortOrder ( server )
{
    return this.getAccountSettings ( server ) . get_strv ( 'columns-order' );
}


function setSortOrder ( server, sort_order )
{
    return this.getAccountSettings ( server ) . set_strv ( 'columns-order', sort_order );
}


function getColumns ( server )
{
    return this.getAccountSettings ( server ) . get_strv ( 'columns' );
}


function setColumns ( server, columns )
{
    return this.getAccountSettings ( server ) . set_strv ( 'columns', columns );
}


function createAccountWidgets ( isActive )
{
    this.prefWidgets = { };

    this._accountsWidget = new Gtk.Notebook( { } );
    this._accountsWidgetContainer.pack_start(this._accountsWidget, true, true, 0);

    for ( var _tab of [ 'Settings', 'Colors', 'Filters', 'Replacements' ] )
    {
        this.createPrefWidgets ( _accountsWidget, _tab, isActive );
    }

    // Settings
    this.prefWidgets['name'].connect('changed', Lang.bind(this, function () {
        let _row = this.accountsChooser.get_selected_row();
        _row.get_child().label = this.prefWidgets['name'].text;
    } ) );


    this._accountsWidget.show_all();
}


function createPrefWidgets ( noteBook, type, isActive )
{
    let grid = new Gtk.Grid ( {
	halign: Gtk.Align.FILL,
	margin: 18,
        column_spacing: 12,
        row_spacing: 12,
        visible: true,
	column_homogeneous: false,
    });
    noteBook.append_page ( grid, new Gtk.Label ( { label: _(type), } ) );

    let y = 0;
    for ( var prefEntry of prefs )
    {
        if ( prefEntry.category != type )
            continue;

	let _label = new Gtk.Label({
            label: prefEntry.label + ':',
            visible: true,
            halign: Gtk.Align.START,
            use_markup: true,
	});
	grid.attach ( _label, 0, y, 1, 1 );

	this.prefWidgets[prefEntry.key] = new prefEntry.type ( {
            halign: ( prefEntry.align ? prefEntry.align : Gtk.Align.FILL ),
            visible: true,
	    hexpand: true,
            can_focus: isActive,
	} );

	let boundValue = 'text';
	if ( prefEntry.key == 'password' )
	{
	    this.prefWidgets[prefEntry.key].set_input_purpose ( Gtk.InputPurpose.PASSWORD );
	    this.prefWidgets[prefEntry.key].set_visibility ( false );
	}
	else if ( prefEntry.key == 'type' )
	{
            [ { name: 'Icinga', value: 'Icinga server' },
              { name: 'Icinga2', value: 'Icinga2 server (using Icingaweb2)' },
              { name: 'Icinga2API', value: 'Icinga2 server (using API)' } ].forEach((item) => {
		  this.prefWidgets[prefEntry.key].insert ( -1, item.name, item.value );
	    } );
	}

	grid.attach(this.prefWidgets[prefEntry.key], 1, y, 1, 1);

	if ( prefEntry.type != Gtk.ComboBoxText )
	{
            //	    this.account_settings.bind(
            //		prefEntry.key,
            //		_entry,
            //		boundValue,
            //		Gio.SettingsBindFlags.DEFAULT
            //	    );
	}
	y++;
    }
}

function activateAccountRow ( ) {

    if ( this._accountsWidget )
        this._accountsWidget.destroy ( );
    this.createAccountWidgets ( true );

    let _row = this.accountsChooser.get_selected_row();
    monitoLog('Active:' + _row.server);
    let _account_settings = getAccountSettings ( _row.server );

    if ( ! _account_settings )
        return;

    for ( var prefEntry of prefs )
    {
	if ( prefEntry.type == Gtk.Entry )
	{
	    _account_settings.bind (
		prefEntry.key,
		this.prefWidgets[prefEntry.key],
		'text',
		Gio.SettingsBindFlags.DEFAULT
	    );
	}
	else if ( prefEntry.type == Gtk.ColorButton )
        {
            let _color = new Gdk.RGBA ( );
            _color.parse (_account_settings.get_string(prefEntry.key) );
            this.prefWidgets[prefEntry.key].set_use_alpha ( false );
            this.prefWidgets[prefEntry.key].set_rgba ( _color );
            this.prefWidgets[prefEntry.key].connect('color-set', Lang.bind ( { key: prefEntry.key, settings: _account_settings }, setColor ) );
        }
	else if ( prefEntry.type == Gtk.ComboBoxText )
	{
	    this.prefWidgets[prefEntry.key].set_active(_account_settings.get_enum('type'));
	    this.prefWidgets[prefEntry.key].connect('changed', Lang.bind(this, function (e) {
                monitoLog ( e ) ;
		monitoLog('Active:' + this.prefWidgets['type'].get_active());
                let _account_settings = getAccountSettings ( _row.server );
                _account_settings.set_enum('type', this.prefWidgets['type'].get_active());
	    }));
	}
    }
}


function addAccountLine ( server_id )
{
    monitoLog ( '> Add line ' + server_id );
    let _account_settings = getAccountSettings ( server_id );
    let row = new Gtk.ListBoxRow ( { hexpand: true,
					 halign: Gtk.Align.FILL } );
    row.server = server_id;
    
    let _label = new Gtk.Label ( { label: _account_settings.get_string('name'),
				   hexpand: true,
				   margin: 5,
				   halign: Gtk.Align.START,
				       expand: true } );
    row.add ( _label );
    this.accountsChooser.add ( row );
    this.accountsChooser.show_all();
}


function createAccount ( ) {
    monitoLog ( '> Create Account' );

    let _servers = this.getServersList ( );
    let _max = Math.max ( ..._servers );
    let _server_id = _max + 1;
    _servers.push ( _server_id );

    let _account_settings = getAccountSettings ( _server_id );
    _account_settings.set_string ( 'name', _('New server #') + _server_id );

    this.addAccountLine ( _max + 1 );
    this.settings.set_string ( 'servers', _servers.join(',') );
}


function removeAccount ( ) {
    let _row = this.accountsChooser.get_selected_row();
    monitoLog('Active:' + _row.server);

    let _servers = this.getServersList ( );
    _servers.splice ( _servers.indexOf ( _row.server ), 1 );
    monitoLog ( _servers );

    if ( ! _row )
        return;

    _row.destroy();
    this.settings.set_string ( 'servers', _servers . join ( ',' ) );
}


function setColor ( color )
{
    monitoLog ( 'Color ' +  + ': ' + color );
    let _output = '#%02x%02x%02x'.format(
        255 * color.get_rgba().red,
        255 * color.get_rgba().green,
        255 * color.get_rgba().blue );
    this.settings.set_string('' + this.key, _output);

}


function monitoLog ( msg )
{
    log ( 'Monito: ' + msg );
}