import Adw from 'gi://Adw';
import Gio from 'gi://Gio';
import GLib from 'gi://GLib';
import Gtk from 'gi://Gtk';
import Gdk from 'gi://Gdk';
import { SettingsEditor } from './settings-editor.js';
import { BRAND, normalizeAccent } from './brand.js';

const BUS = 'io.qvac.Jarvis';
const PATH = '/io/qvac/Jarvis';
const IFACE = 'io.qvac.Jarvis.Session';
const OVERLAY_STYLES = ['tray', 'expanded'];

function applyBrandCss(directory) {
  try {
    const css = new Gtk.CssProvider();
    css.load_from_path(`${directory}/brand/gtk.css`);
    Gtk.StyleContext.add_provider_for_display(Gdk.Display.get_default(), css, Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION);
  } catch {}
}

function brandBanner(directory) {
  const row = new Adw.ActionRow({ title: BRAND.product, subtitle: `${BRAND.tagline} · ${BRAND.publisher}` });
  try {
    const image = Gtk.Image.new_from_file(`${directory}/brand/icons/jarvis-mark.svg`);
    image.set_pixel_size(36);
    row.add_prefix(image);
  } catch {}
  row.activatable = false;
  return row;
}

function accentRow(settings) {
  const current = normalizeAccent(settings.get_string('accent-color'));
  const row = new Adw.ActionRow({
    title: 'Accent color',
    subtitle: 'Gold is the Jarvis default. This tints the HUD immediately.',
  });
  const box = new Gtk.Box({ spacing: 6, valign: Gtk.Align.CENTER });
  for (const accent of BRAND.accents) {
    const button = new Gtk.Button({ tooltip_text: accent.label, valign: Gtk.Align.CENTER });
    button.add_css_class('circular');
    button.add_css_class('jarvis-swatch');
    button.add_css_class(`jarvis-swatch-${accent.id}`);
    button.set_size_request(24, 24);
    button.connect('clicked', () => settings.set_string('accent-color', accent.value));
    box.append(button);
  }
  const entry = new Gtk.Entry({ text: current, width_chars: 9, valign: Gtk.Align.CENTER });
  try { entry.get_buffer().set_max_length(7); } catch {}
  entry.connect('changed', () => {
    const value = normalizeAccent(entry.get_text(), '');
    if (value) settings.set_string('accent-color', value);
  });
  settings.connect('changed::accent-color', () => {
    const value = normalizeAccent(settings.get_string('accent-color'));
    if (entry.get_text() !== value) entry.set_text(value);
  });
  row.add_suffix(box);
  row.add_suffix(entry);
  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 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: 'Jarvis needs a temporary grant before observing or controlling the desktop.',
  });
  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 the configured grant duration.';
      }
    });
  };
  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 function fillSettingsWindow(window, settings, directory) {
    window.set_title(BRAND.product);
    window.set_default_size(840, 780);
    window.search_enabled = true;
    applyBrandCss(directory);
    const editor = new SettingsEditor(directory, settings);
    const intro = new Adw.PreferencesGroup();
    intro.add(brandBanner(directory));
    const voice = editor.page(window, 'Voice', ['Speech', 'Voice design'], 'audio-speakers-symbolic', true, intro);
    window.add(voice);
    const listening = editor.page(window, 'Listening', ['Listening', 'Wake and privacy', 'Detection tuning', 'Audio routing'], 'audio-input-microphone-symbolic');
    window.add(listening);

    const desktop = editor.page(window, 'Desktop', ['Desktop access', 'Desktop images'], 'preferences-desktop-display-symbolic');
    const desktopGroup = new Adw.PreferencesGroup({ title: 'Overlay and shortcuts', description: 'These appearance settings take effect immediately.' });
    desktopGroup.add(strvRow(settings, 'Hotkey', 'hotkey'));
    desktopGroup.add(accentRow(settings));
    desktopGroup.add(comboRow(settings, 'Desktop layout', 'Tray keeps Jarvis in the top bar; expanded opens a conversation panel', 'overlay-style', OVERLAY_STYLES));
    desktop.add(desktopGroup);
    const grantGroup = new Adw.PreferencesGroup({ title: 'Temporary desktop access' });
    grantGroup.add(grantRow()); desktop.add(grantGroup);
    window.add(desktop);
    const models = editor.page(window, 'Models', ['Chat model', 'Agent limits'], 'system-run-symbolic');
    const service = new Adw.PreferencesGroup({ title: 'Apply chat model changes' });
    const restart = new Adw.ActionRow({ title: 'Restart Jarvis', subtitle: 'Saves your changes and restarts the user service. Ends the current request and desktop grant.' });
    const restartButton = new Gtk.Button({ label: 'Save & Restart', valign: Gtk.Align.CENTER });
    restartButton.connect('clicked', async () => { restartButton.sensitive = false; try { await editor.restart(); } finally { restartButton.sensitive = true; } });
    restart.add_suffix(restartButton); service.add(restart); models.add(service);
    window.add(models);
    return { editor, pages: [voice, listening, desktop, models] };
}