import { ExtensionPreferences } from 'resource:///org/gnome/Shell/Extensions/js/extensions/prefs.js';
import Adw from 'gi://Adw';
import Gio from 'gi://Gio';
import GLib from 'gi://GLib';
import Gtk from 'gi://Gtk';

const BIND = Gio.SettingsBindFlags.DEFAULT;
const BUS = 'io.qvac.Jarvis';
const PATH = '/io/qvac/Jarvis';
const IFACE = 'io.qvac.Jarvis.Session';
const PRIVACY_MODES = ['full-listen-after-wake', 'wake-only', 'off'];
const OVERLAY_STYLES = ['tray', 'expanded'];
const COMPUTER_MODES = ['off', 'observe', 'act'];
const MODEL_PROFILES = ['laptop-8gb', 'laptop-16gb', 'desktop-gpu'];

function persistDaemonConfig(settings) {
  const dir = GLib.build_filenamev([GLib.get_user_config_dir(), 'jarvis']);
  GLib.mkdir_with_parents(dir, 0o755);
  const file = Gio.File.new_for_path(GLib.build_filenamev([dir, 'config.json']));
  let config = {};
  try {
    const [, contents] = file.load_contents(null);
    const text = typeof contents === 'string' ? contents : new TextDecoder().decode(contents);
    config = JSON.parse(text);
  } catch {}
  config.wakePhrase = settings.get_string('wake-phrase');
  config.aliases = settings.get_strv('aliases');
  config.ttsEnabled = settings.get_boolean('tts-enabled');
  config.modelProfile = settings.get_string('model-profile');
  file.replace_contents(`${JSON.stringify(config, null, 2)}\n`, null, false, Gio.FileCreateFlags.REPLACE_DESTINATION, null);
}

function entryRow(settings, title, key) {
  const row = new Adw.EntryRow({ title });
  row.set_text(settings.get_string(key));
  row.connect('changed', () => settings.set_string(key, row.get_text()));
  return row;
}

function strvRow(settings, title, key) {
  const row = new Adw.EntryRow({ title });
  row.set_text(settings.get_strv(key).join(', '));
  row.connect('changed', () => {
    const values = row.get_text().split(',').map((item) => item.trim()).filter(Boolean);
    settings.set_strv(key, values);
  });
  return row;
}

function switchRow(settings, title, subtitle, key) {
  const row = new Adw.SwitchRow({ title, subtitle });
  settings.bind(key, row, 'active', BIND);
  return row;
}

function comboRow(settings, title, subtitle, key, values) {
  const row = new Adw.ComboRow({ title, subtitle, model: Gtk.StringList.new(values) });
  const current = settings.get_string(key);
  row.selected = Math.max(0, values.indexOf(current));
  row.connect('notify::selected', () => {
    const value = values[row.selected];
    if (value) settings.set_string(key, value);
  });
  return row;
}

function callDaemon(name, signature, values, onDone) {
  Gio.DBus.session.call(
    BUS,
    PATH,
    IFACE,
    name,
    signature ? GLib.Variant.new(signature, values) : null,
    null,
    Gio.DBusCallFlags.NONE,
    4000,
    null,
    (_source, result) => {
      try {
        const reply = Gio.DBus.session.call_finish(result);
        onDone?.(null, reply);
      } catch (error) {
        onDone?.(error);
      }
    },
  );
}

function grantRow() {
  const row = new Adw.ActionRow({
    title: 'Desktop grant',
    subtitle: 'Off. Jarvis cannot click or type until you allow it here.',
  });
  const allow = new Gtk.Button({ label: 'Allow now', valign: Gtk.Align.CENTER });
  allow.add_css_class('suggested-action');
  const revoke = new Gtk.Button({ label: 'Revoke', valign: Gtk.Align.CENTER });
  revoke.add_css_class('destructive-action');
  const refresh = () => {
    callDaemon('ComputerStatus', null, null, (error, reply) => {
      if (error) {
        row.subtitle = 'Jarvis daemon is unavailable. Start jarvisd, then try Allow now.';
        return;
      }
      let status = {};
      try {
        const unpacked = reply.deep_unpack?.() ?? reply.unpack?.();
        const raw = Array.isArray(unpacked) ? unpacked[0] : unpacked;
        status = JSON.parse(String(raw || '{}'));
      } catch {}
      if (status.active) {
        row.subtitle = `Active. ${Number(status.steps_used) || 0} of ${Number(status.steps_max) || 20} steps used.`;
      } else {
        row.subtitle = 'Off. Press Allow now so Jarvis can observe or control the desktop for three minutes.';
      }
    });
  };
  allow.connect('clicked', () => {
    callDaemon('ComputerGrant', '(b)', [true], (error) => {
      row.subtitle = error ? `Could not grant: ${error.message}` : 'Grant requested. A portal prompt may appear.';
      refresh();
    });
  });
  revoke.connect('clicked', () => {
    callDaemon('ComputerRevoke', null, null, (error) => {
      row.subtitle = error ? `Could not revoke: ${error.message}` : 'Grant revoked.';
      refresh();
    });
  });
  row.add_suffix(allow);
  row.add_suffix(revoke);
  row.activatable_widget = allow;
  refresh();
  return row;
}

export default class JarvisPreferences extends ExtensionPreferences {
  fillPreferencesWindow(window) {
    window.set_title('Jarvis QVAC');
    const settings = this.getSettings();
    const voice = new Adw.PreferencesPage({ title: 'Voice', name: 'voice' });
    const voiceGroup = new Adw.PreferencesGroup({ title: 'Speech and wake' });
    voiceGroup.add(switchRow(settings, 'Spoken replies', 'Play Jarvis replies through local TTS', 'tts-enabled'));
    voiceGroup.add(switchRow(settings, 'Wake chime', 'Play a short chime when Jarvis starts listening', 'chime-enabled'));
    voiceGroup.add(entryRow(settings, 'Wake phrase', 'wake-phrase'));
    voiceGroup.add(strvRow(settings, 'Wake aliases', 'aliases'));
    voiceGroup.add(entryRow(settings, 'Voice id', 'voice-id'));
    voiceGroup.add(entryRow(settings, 'Language', 'language'));
    voice.add(voiceGroup);

    const desktop = new Adw.PreferencesPage({ title: 'Desktop', name: 'desktop' });
    const desktopGroup = new Adw.PreferencesGroup({ title: 'Overlay and shortcuts' });
    desktopGroup.add(strvRow(settings, 'Hotkey', 'hotkey'));
    desktopGroup.add(entryRow(settings, 'Accent color', 'accent-color'));
    desktopGroup.add(comboRow(settings, 'Desktop layout', 'Tray keeps Jarvis in the top bar; expanded opens a conversation panel', 'overlay-style', OVERLAY_STYLES));
    desktopGroup.add(switchRow(settings, 'Confirm destructive actions', 'Ask before write, delete, or computer-use changes', 'confirm-destructive'));
    desktop.add(desktopGroup);

    const computer = new Adw.PreferencesPage({ title: 'Computer use', name: 'computer' });
    const computerGroup = new Adw.PreferencesGroup({ title: 'Desktop control' });
    computerGroup.add(comboRow(settings, 'Computer use mode', 'Observe is read-only. Act can click and type only after you press Allow now.', 'computer-use-mode', COMPUTER_MODES));
    computerGroup.add(grantRow());
    computerGroup.add(switchRow(settings, 'Legacy input', 'Use the older input backend when portals are unavailable', 'computer-use-legacy-input'));
    computerGroup.add(comboRow(settings, 'Privacy mode', 'How long Jarvis keeps the microphone open after wake', 'privacy-mode', PRIVACY_MODES));
    computer.add(computerGroup);

    const models = new Adw.PreferencesPage({ title: 'Models', name: 'models' });
    const modelGroup = new Adw.PreferencesGroup({ title: 'Local profile' });
    modelGroup.add(comboRow(settings, 'Model profile', 'Restart jarvisd after changing the QVAC profile', 'model-profile', MODEL_PROFILES));
    models.add(modelGroup);

    window.add(voice);
    window.add(desktop);
    window.add(computer);
    window.add(models);

    persistDaemonConfig(settings);
    for (const key of ['wake-phrase', 'aliases', 'tts-enabled', 'model-profile']) {
      settings.connect(`changed::${key}`, () => persistDaemonConfig(settings));
    }
  }
}