import { unwrap } from '@pipu/core';
import { useQuery } from '@tanstack/react-query';
import { useState } from 'react';
import { useTranslation } from 'react-i18next';
import { Pressable, ScrollView, Text, View } from 'react-native';

import { useSession, useUser } from '../../lib/session';
import { player } from '../../player/controller';
import { usePlayerState } from '../../player/hooks';
import { useColors } from '../../theme';
import { ErrorBox, Icon, Screen, useErrorText, type IconName } from '../../ui/kit';
import { OnboardingGate } from '../../ui/Onboarding';
import { WaveOrb } from '../../ui/wave/WaveOrb';

/** Имена из /wave/options (Material Symbols) → MaterialIcons. */
function iconFor(name: string): IconName {
  const map: Record<string, string> = { rainy: 'umbrella', sentiment_satisfied: 'sentiment-satisfied' };
  return (map[name] ?? name.replace(/_/g, '-')) as IconName;
}

/**
 * Главная: кнопка «Моя волна» (Skia, вид orb / liquid из профиля) и выбор занятия / настроения.
 * На Android спектр недоступен, поэтому пульс берётся из BPM и energy трека (docs/mobile.md).
 */
export default function HomeScreen() {
  return <OnboardingGate><WaveHome /></OnboardingGate>;
}

function WaveHome() {
  const colors = useColors();
  const { t } = useTranslation();
  const tr = t as unknown as (k: string) => string;
  const session = useSession();
  const user = useUser();
  const st = usePlayerState();
  const errorText = useErrorText();
  const [error, setError] = useState<unknown>(null);
  const [activity, setActivity] = useState<string | null>(st.wave?.activity ?? null);
  const [mood, setMood] = useState<string | null>(st.wave?.mood ?? null);
  const options = useQuery({
    queryKey: ['wave-options'],
    queryFn: async () => unwrap(await session.client.GET('/api/v1/wave/options')),
    staleTime: Infinity,
  });

  const waveOn = st.wave !== null;
  const playing = waveOn && st.playing;
  const run = (fn: () => Promise<void>) => {
    setError(null);
    fn().catch(setError);
  };
  const onWave = () => (waveOn ? player.toggle() : run(() => player.startWave(activity, mood)));
  const choose = (kind: 'activity' | 'mood', key: string) => {
    const a = kind === 'activity' ? (activity === key ? null : key) : activity;
    const m = kind === 'mood' ? (mood === key ? null : key) : mood;
    setActivity(a);
    setMood(m);
    if (waveOn) run(() => player.setWaveContext(a, m));
  };
  const ctx = [activity && tr(`wave.activities.${activity}`), mood && tr(`wave.moods.${mood}`)].filter(Boolean).join(' · ') || t('wave.for_you');

  return (
    <Screen>
      <ScrollView contentContainerStyle={{ alignItems: 'center', paddingVertical: 32, gap: 24, paddingHorizontal: 16 }}>
        <WaveOrb
          variant={user.ui_prefs.wave_variant ?? 'orb'}
          size={260}
          playing={playing}
          bpm={st.track?.features?.bpm ?? 100}
          energy={st.track?.features?.energy ?? 0.6}
          colors={waveOn ? st.track?.album.cover_colors : undefined}
          onPress={onWave}
          label={t(playing ? 'wave.pause' : 'wave.start')}
        >
          <Icon name={playing ? 'pause' : 'play-arrow'} size={44} color="#fff" />
          <Text style={{ color: '#fff', fontSize: 22, fontWeight: '700' }}>{t('wave.title')}</Text>
          <Text style={{ color: 'rgba(255,255,255,0.85)', fontSize: 13 }}>{ctx}</Text>
        </WaveOrb>
        {st.wave?.fallback && <Text style={{ color: colors.text2, fontSize: 13 }}>{t('wave.fallback')}</Text>}
        <ErrorBox>{error ? errorText(error) : null}</ErrorBox>
        {options.data && (
          <>
            <Chips title={t('wave.activity_label')} options={options.data.activities} value={activity} label={(k) => tr(`wave.activities.${k}`)} onPick={(k) => choose('activity', k)} />
            <Chips title={t('wave.mood_label')} options={options.data.moods} value={mood} label={(k) => tr(`wave.moods.${k}`)} onPick={(k) => choose('mood', k)} />
          </>
        )}
      </ScrollView>
    </Screen>
  );
}

function Chips({
  title,
  options,
  value,
  label,
  onPick,
}: {
  title: string;
  options: { key: string; icon: string }[];
  value: string | null;
  label: (k: string) => string;
  onPick: (k: string) => void;
}) {
  const colors = useColors();
  return (
    <View style={{ alignItems: 'center', gap: 10, width: '100%' }}>
      <Text style={{ color: colors.text3, fontSize: 11, fontWeight: '700', letterSpacing: 0.8, textTransform: 'uppercase' }}>{title}</Text>
      <View style={{ flexDirection: 'row', flexWrap: 'wrap', justifyContent: 'center', gap: 8 }}>
        {options.map((o) => {
          const on = value === o.key;
          return (
            <Pressable
              key={o.key}
              onPress={() => onPick(o.key)}
              accessibilityRole="button"
              accessibilityState={{ selected: on }}
              style={{
                flexDirection: 'row',
                alignItems: 'center',
                gap: 6,
                height: 38,
                paddingHorizontal: 14,
                borderRadius: 999,
                backgroundColor: on ? colors['accent-fill'] : colors.surface2,
                borderWidth: 1,
                borderColor: on ? colors.accent : colors.line,
              }}
            >
              <Icon name={iconFor(o.icon)} size={18} color={on ? '#fff' : colors.text2} />
              <Text style={{ color: on ? '#fff' : colors.text, fontWeight: '500' }}>{label(o.key)}</Text>
            </Pressable>
          );
        })}
      </View>
    </View>
  );
}