import { useEffect, useLayoutEffect, useMemo, useState } from 'react';
import { StyleSheet, View } from 'react-native';
import { Pressable } from 'react-native';
import { useTranslation } from 'react-i18next';
import { useNavigation } from 'expo-router';
import Animated, {
  Easing,
  runOnJS,
  useAnimatedStyle,
  useSharedValue,
  withSequence,
  withTiming,
} from 'react-native-reanimated';

import { MOCK_CONTENT } from '@/src/constants/mockContent';
import {
  addFavorite,
  getThemeMode,
  getUserProfile,
  setReaction,
  setThemeMode,
  type ThemeMode,
} from '@/src/storage/appStorage';

import ProfileModal from '@/components/home/ProfileModal';
import ThemeModal from '@/components/home/ThemeModal';

import ThemeIcon from '@/assets/images/home/theme.svg';
import MyIcon from '@/assets/images/home/my.svg';
import LikeOutlineIcon from '@/assets/images/home/like.svg';
import LikeFilledIcon from '@/assets/images/home/like_filled.svg';
import HateIcon from '@/assets/images/home/hate.svg';

export default function HomeScreen() {
  const { t } = useTranslation();
  const navigation = useNavigation();
  const [index, setIndex] = useState(0);
  const [themeMode, setThemeModeState] = useState<ThemeMode>('scenery');
  const [themeOpen, setThemeOpen] = useState(false);
  const [profileOpen, setProfileOpen] = useState(false);
  const [profileName, setProfileName] = useState<string | undefined>(undefined);
  const [busy, setBusy] = useState(false);
  const [likeFilled, setLikeFilled] = useState(false);

  const item = useMemo(() => MOCK_CONTENT[index % MOCK_CONTENT.length], [index]);

  useEffect(() => {
    let cancelled = false;
    (async () => {
      const mode = await getThemeMode();
      const profile = await getUserProfile();
      if (cancelled) return;
      setThemeModeState(mode);
      setProfileName(profile.name);
    })();
    return () => {
      cancelled = true;
    };
  }, []);

  const backgroundColor = themeMode === 'color' ? '#F3D0E1' : '#F4D6C2';

  useLayoutEffect(() => {
    navigation.setOptions({
      headerShadowVisible: false,
      headerStyle: { backgroundColor },
      headerRight: () => (
        <View style={styles.headerRight}>
          <CircleIconButton
            onPress={() => setThemeOpen(true)}
            accessibilityLabel={t('home.theme')}
          >
            <ThemeIcon width={18} height={18} />
          </CircleIconButton>
          <CircleIconButton
            onPress={() => setProfileOpen(true)}
            accessibilityLabel={t('home.profile')}
          >
            <MyIcon width={18} height={18} />
          </CircleIconButton>
        </View>
      ),
    });
  }, [backgroundColor, navigation, t]);

  const likeScale = useSharedValue(1);
  const hateScale = useSharedValue(1);

  const likeAnimatedStyle = useAnimatedStyle(() => ({
    transform: [{ scale: likeScale.value }],
  }));

  const hateAnimatedStyle = useAnimatedStyle(() => ({
    transform: [{ scale: hateScale.value }],
  }));

  function playLikeAnimationAndThen(next: () => void) {
    setLikeFilled(true);
    likeScale.value = withSequence(
      withTiming(0.92, { duration: 90, easing: Easing.out(Easing.cubic) }),
      withTiming(1.14, { duration: 120, easing: Easing.out(Easing.cubic) }),
      withTiming(1, { duration: 140, easing: Easing.out(Easing.cubic) }, (finished) => {
        if (finished) runOnJS(next)();
      })
    );
  }

  function playHateAnimationAndThen(next: () => void) {
    hateScale.value = withSequence(
      withTiming(0.92, { duration: 90, easing: Easing.out(Easing.cubic) }),
      withTiming(1.06, { duration: 110, easing: Easing.out(Easing.cubic) }),
      withTiming(1, { duration: 120, easing: Easing.out(Easing.cubic) }, (finished) => {
        if (finished) runOnJS(next)();
      })
    );
  }

  function onPressLike() {
    if (busy) return;
    setBusy(true);
    playLikeAnimationAndThen(async () => {
      await setReaction(item.id, 'like');
      await addFavorite(item.id);
      setIndex((i) => i + 1);
      setTimeout(() => setLikeFilled(false), 220);
      setBusy(false);
    });
  }

  function onPressHate() {
    if (busy) return;
    setBusy(true);
    playHateAnimationAndThen(async () => {
      await setReaction(item.id, 'dislike');
      setIndex((i) => i + 1);
      setBusy(false);
    });
  }

  async function onSelectTheme(next: ThemeMode) {
    setThemeModeState(next);
    await setThemeMode(next);
    setThemeOpen(false);
  }

  return (
    <View style={[styles.container, { backgroundColor }]}>
      <View style={styles.card}>
        <Animated.Text style={styles.text}>{item.text}</Animated.Text>
      </View>

      <View style={styles.actions}>
        <Animated.View style={[styles.reactionButton, hateAnimatedStyle]}>
          <Pressable
            onPress={onPressHate}
            onPressIn={() => (hateScale.value = withTiming(0.92, { duration: 80 }))}
            onPressOut={() => (hateScale.value = withTiming(1, { duration: 120 }))}
            accessibilityRole="button"
            accessibilityLabel={t('home.dislike')}
            hitSlop={10}
            style={styles.reactionInner}
          >
            <HateIcon width={30} height={30} />
          </Pressable>
        </Animated.View>

        <Animated.View style={[styles.reactionButton, likeAnimatedStyle]}>
          <Pressable
            onPress={onPressLike}
            onPressIn={() => (likeScale.value = withTiming(0.92, { duration: 80 }))}
            onPressOut={() => (likeScale.value = withTiming(1, { duration: 120 }))}
            accessibilityRole="button"
            accessibilityLabel={t('home.like')}
            hitSlop={10}
            style={styles.reactionInner}
          >
            {likeFilled ? (
              <LikeFilledIcon width={30} height={30} />
            ) : (
              <LikeOutlineIcon width={30} height={30} />
            )}
          </Pressable>
        </Animated.View>
      </View>

      <ThemeModal visible={themeOpen} mode={themeMode} onSelect={onSelectTheme} onClose={() => setThemeOpen(false)} />
      <ProfileModal
        visible={profileOpen}
        name={profileName}
        onClose={() => setProfileOpen(false)}
      />
    </View>
  );
}

function CircleIconButton({
  onPress,
  accessibilityLabel,
  children,
}: {
  onPress: () => void;
  accessibilityLabel: string;
  children: React.ReactNode;
}) {
  return (
    <Pressable
      onPress={onPress}
      hitSlop={10}
      accessibilityRole="button"
      accessibilityLabel={accessibilityLabel}
      style={styles.circleBtn}
    >
      {children}
    </Pressable>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    padding: 20,
    justifyContent: 'center',
    gap: 16,
  },
  headerRight: {
    flexDirection: 'row',
    gap: 10,
    paddingRight: 10,
  },
  circleBtn: {
    width: 34,
    height: 34,
    borderRadius: 17,
    backgroundColor: 'rgba(255,255,255,0.75)',
    alignItems: 'center',
    justifyContent: 'center',
  },
  card: {
    borderRadius: 16,
    padding: 20,
    backgroundColor: 'rgba(255,255,255,0.65)',
    borderWidth: StyleSheet.hairlineWidth,
    borderColor: '#E5E7EB',
  },
  text: {
    fontSize: 20,
    lineHeight: 28,
    color: '#5E2A28',
    fontWeight: '700',
  },
  actions: {
    flexDirection: 'row',
    gap: 12,
    justifyContent: 'center',
  },
  reactionButton: {
    width: 58,
    height: 58,
    borderRadius: 29,
    backgroundColor: 'rgba(255,255,255,0.75)',
    alignItems: 'center',
    justifyContent: 'center',
  },
  reactionInner: {
    width: 58,
    height: 58,
    borderRadius: 29,
    alignItems: 'center',
    justifyContent: 'center',
  },
});