import { ApiError, unwrap } from '@pipu/core';
import { useState, useSyncExternalStore } from 'react';
import { useTranslation } from 'react-i18next';
import { Text, View } from 'react-native';

import { QUALITIES, qualityPrefs, type Quality, type QualityPrefs } from '../lib/prefs';
import { useSession } from '../lib/session';
import { useColors } from '../theme';
import { Button, ErrorBox, Field, Segmented, Sheet, useErrorText } from './kit';

export function useQualityPrefs(): QualityPrefs {
  return useSyncExternalStore(qualityPrefs.subscribe, qualityPrefs.get);
}

/** Лист «Качество звука»: Wi-Fi / сотовая / загрузки. */
export function QualitySheet({ visible, onClose }: { visible: boolean; onClose: () => void }) {
  const { t } = useTranslation();
  const colors = useColors();
  const prefs = useQualityPrefs();
  const row = (key: keyof QualityPrefs) => (
    <View style={{ gap: 8 }}>
      <Text style={{ color: colors.text2, fontSize: 13, fontWeight: '600' }}>{t(`mobile.quality_${key}`)}</Text>
      <Segmented<Quality>
        value={prefs[key]}
        options={QUALITIES.map((q) => ({ value: q, label: t(`mobile.q_${q}`) }))}
        onChange={(q) => void qualityPrefs.set({ [key]: q })}
      />
    </View>
  );
  return (
    <Sheet visible={visible} title={t('mobile.quality')} onClose={onClose}>
      {row('wifi')}
      {row('cellular')}
      {row('download')}
      <Text style={{ color: colors.text3, fontSize: 12 }}>{t('mobile.quality_hint')}</Text>
    </Sheet>
  );
}

/** Лист смены пароля: после смены сервер выдаёт новую пару токенов, остальные сессии завершаются. */
export function PasswordSheet({ visible, onClose }: { visible: boolean; onClose: () => void }) {
  const { t } = useTranslation();
  const colors = useColors();
  const session = useSession();
  const errorText = useErrorText();
  const [current, setCurrent] = useState('');
  const [next, setNext] = useState('');
  const [repeat, setRepeat] = useState('');
  const [busy, setBusy] = useState(false);
  const [error, setError] = useState<unknown>(null);
  const [done, setDone] = useState(false);
  const mismatch = repeat !== '' && repeat !== next;
  const fieldErr = (f: string) => (error instanceof ApiError && error.fieldCode(f) ? errorText(error) : undefined);

  const close = () => {
    setCurrent('');
    setNext('');
    setRepeat('');
    setError(null);
    setDone(false);
    onClose();
  };
  const submit = async () => {
    setBusy(true);
    setError(null);
    try {
      const tokens = unwrap(await session.client.POST('/api/v1/me/password', { body: { current_password: current, new_password: next } }));
      await session.apply(tokens);
      setDone(true);
      setCurrent('');
      setNext('');
      setRepeat('');
    } catch (e) {
      setError(e);
    } finally {
      setBusy(false);
    }
  };

  return (
    <Sheet visible={visible} title={t('settings.password')} onClose={close}>
      {done ? (
        <>
          <Text style={{ color: colors.ok }}>{t('settings.password_changed')}</Text>
          <Button title={t('form.close')} onPress={close} />
        </>
      ) : (
        <>
          <Field label={t('settings.current_password')} value={current} onChangeText={setCurrent} secure autoComplete="current-password" error={fieldErr('current_password')} />
          <Field label={t('settings.new_password')} value={next} onChangeText={setNext} secure autoComplete="new-password" error={fieldErr('new_password')} />
          <Field
            label={t('settings.repeat_password')}
            value={repeat}
            onChangeText={setRepeat}
            secure
            autoComplete="new-password"
            error={mismatch ? t('form.passwords_mismatch') : undefined}
          />
          <ErrorBox>{error && !fieldErr('current_password') && !fieldErr('new_password') ? errorText(error) : null}</ErrorBox>
          <Button
            title={t('settings.change_password')}
            busy={busy}
            disabled={!current || !next || mismatch || repeat === ''}
            onPress={() => void submit()}
          />
        </>
      )}
    </Sheet>
  );
}