import { useTranslation } from 'react-i18next';

import { VolumeSlider, VoiceDeviceList } from '@/components/voice/VoiceControls';
import { PUSH_TO_TALK_KEYS, useVoiceStore, type PushToTalkKey } from '@/stores/voice';
import { useDeviceChoice } from '@/lib/useMediaDevices';
import { SettingsSection } from '@/pages/settings/SettingsSection';

/**
 * Подписи клавиш push-to-talk: `code` не зависит от раскладки, поэтому
 * хранится код, а показывается человекочитаемое имя.
 */
const PTT_KEY_LABELS: Record<PushToTalkKey, string> = {
  Space: 'settings.voice.pttKeys.space',
  KeyV: 'settings.voice.pttKeys.v',
  KeyB: 'settings.voice.pttKeys.b',
  KeyN: 'settings.voice.pttKeys.n',
  AltLeft: 'settings.voice.pttKeys.alt',
  ControlLeft: 'settings.voice.pttKeys.ctrl',
};

/**
 * «Аудио-видео»: устройства ввода/вывода, громкости, режим активации
 * микрофона (голосовая активация или push-to-talk) и переключатели звуков
 * сервера (AGENT.md 7.13/7.14).
 *
 * Значения хранятся локально (zustand + localStorage) и применяются на лету:
 * выбранное устройство сразу переключается в активной голосовой сессии.
 */
export function VoiceSettingsSection() {
  const { t } = useTranslation();
  const mic = useDeviceChoice('audioinput');
  const camera = useDeviceChoice('videoinput');
  const output = useDeviceChoice('audiooutput');
  const micVolume = useVoiceStore((state) => state.micVolume);
  const outputVolume = useVoiceStore((state) => state.outputVolume);
  const setMicVolume = useVoiceStore((state) => state.setMicVolume);
  const setOutputVolume = useVoiceStore((state) => state.setOutputVolume);
  const micActivation = useVoiceStore((state) => state.micActivation);
  const pttKey = useVoiceStore((state) => state.pttKey);
  const eventSoundsEnabled = useVoiceStore((state) => state.eventSoundsEnabled);
  const soundboardEnabled = useVoiceStore((state) => state.soundboardEnabled);
  const latencySharingEnabled = useVoiceStore((state) => state.latencySharingEnabled);
  const interfaceSoundsEnabled = useVoiceStore((state) => state.interfaceSoundsEnabled);
  const setMicActivation = useVoiceStore((state) => state.setMicActivation);
  const setPttKey = useVoiceStore((state) => state.setPttKey);
  const setEventSoundsEnabled = useVoiceStore((state) => state.setEventSoundsEnabled);
  const setLatencySharingEnabled = useVoiceStore((state) => state.setLatencySharingEnabled);
  const setInterfaceSoundsEnabled = useVoiceStore((state) => state.setInterfaceSoundsEnabled);
  const setSoundboardEnabled = useVoiceStore((state) => state.setSoundboardEnabled);

  return (
    <SettingsSection
      title={t('settings.voice.title')}
      description={t('settings.voice.description')}
    >
      <div className="mt-4 grid gap-4 sm:grid-cols-2">
        <VoiceDeviceList
          kind="audioinput"
          label={t('settings.voice.input')}
          value={mic.value}
          onChange={mic.select}
        />
        <VoiceDeviceList
          kind="videoinput"
          label={t('settings.voice.camera')}
          value={camera.value}
          onChange={camera.select}
        />
        <VoiceDeviceList
          kind="audiooutput"
          label={t('settings.voice.output')}
          value={output.value}
          onChange={output.select}
        />
        <div className="flex flex-col justify-end gap-2">
          <VolumeSlider
            label={t('settings.voice.micVolume')}
            value={micVolume}
            onChange={setMicVolume}
          />
          <VolumeSlider
            label={t('settings.voice.outputVolume')}
            value={outputVolume}
            onChange={setOutputVolume}
          />
        </div>
      </div>

      {/* Режим активации микрофона: голосовая активация или push-to-talk. */}
      <fieldset className="mt-5 border-t border-border/40 pt-4">
        <legend className="text-sm font-semibold">{t('settings.voice.micMode')}</legend>
        <div className="mt-2 flex flex-col gap-1">
          {(['voice', 'push_to_talk'] as const).map((mode) => (
            <label key={mode} className="flex items-center gap-2 text-sm">
              <input
                type="radio"
                name="mic_activation"
                value={mode}
                checked={micActivation === mode}
                aria-label={t(`settings.voice.micModes.${mode}`)}
                onChange={() => setMicActivation(mode)}
              />
              <span>{t(`settings.voice.micModes.${mode}`)}</span>
            </label>
          ))}
        </div>

        {micActivation === 'push_to_talk' ? (
          <div className="mt-3 flex flex-col gap-2">
            <label className="flex items-center gap-2 text-sm">
              <span className="text-fg-muted">{t('settings.voice.pttKey')}</span>
              <select
                value={pttKey}
                aria-label={t('settings.voice.pttKey')}
                data-testid="ptt-key-select"
                onChange={(event) => setPttKey(event.target.value as PushToTalkKey)}
                className="rounded-[var(--radius-sm)] border border-border/60 bg-surface-1 px-2 py-1 text-sm"
              >
                {PUSH_TO_TALK_KEYS.map((key) => (
                  <option key={key} value={key}>
                    {t(PTT_KEY_LABELS[key])}
                  </option>
                ))}
              </select>
            </label>
            <p className="text-xs text-fg-muted">{t('settings.voice.pttHint')}</p>
          </div>
        ) : null}
      </fieldset>

      {/* Звуки сервера: палитра событий и саундборд (AGENT.md 7.13). */}
      <fieldset className="mt-5 border-t border-border/40 pt-4">
        <legend className="text-sm font-semibold">{t('settings.voice.sounds')}</legend>
        <label className="mt-2 flex items-center gap-2 text-sm">
          <input
            type="checkbox"
            checked={eventSoundsEnabled}
            aria-label={t('settings.voice.eventSounds')}
            onChange={(event) => setEventSoundsEnabled(event.target.checked)}
          />
          <span>{t('settings.voice.eventSounds')}</span>
        </label>
        <p className="ml-6 text-xs text-fg-muted">{t('settings.voice.eventSoundsHint')}</p>
        <label className="mt-3 flex items-center gap-2 text-sm">
          <input
            type="checkbox"
            checked={interfaceSoundsEnabled}
            aria-label={t('settings.voice.interfaceSounds')}
            onChange={(event) => setInterfaceSoundsEnabled(event.target.checked)}
          />
          <span>{t('settings.voice.interfaceSounds')}</span>
        </label>
        <p className="ml-6 text-xs text-fg-muted">{t('settings.voice.interfaceSoundsHint')}</p>
        <label className="mt-3 flex items-center gap-2 text-sm">
          <input
            type="checkbox"
            checked={soundboardEnabled}
            aria-label={t('settings.voice.soundboard')}
            onChange={(event) => setSoundboardEnabled(event.target.checked)}
          />
          <span>{t('settings.voice.soundboard')}</span>
        </label>
        <p className="ml-6 text-xs text-fg-muted">{t('settings.voice.soundboardHint')}</p>
      </fieldset>

      {/* Пинг участников: задержка в комнате и публикация своей (AGENT.md 7.14). */}
      <fieldset className="mt-5 border-t border-border/40 pt-4">
        <legend className="text-sm font-semibold">{t('settings.voice.latency')}</legend>
        <label className="mt-2 flex items-center gap-2 text-sm">
          <input
            type="checkbox"
            checked={latencySharingEnabled}
            aria-label={t('settings.voice.latencySharing')}
            onChange={(event) => setLatencySharingEnabled(event.target.checked)}
          />
          <span>{t('settings.voice.latencySharing')}</span>
        </label>
        <p className="ml-6 text-xs text-fg-muted">{t('settings.voice.latencySharingHint')}</p>
      </fieldset>

      <p className="mt-4 text-xs text-fg-muted">{t('settings.voice.stub')}</p>
    </SettingsSection>
  );
}