import { useEffect, useRef } from 'react';
import { Animated, Easing, Text, View } from 'react-native';
import { Ionicons } from '@expo/vector-icons';
import type { ColorScheme } from '../lib/theme';

/**
 * Custom-Spotlight für den interaktiven Onboarding-Flow (statt react-native-copilot).
 * Zwei wiederverwendbare Bausteine:
 *
 *  - <OnboardingTooltip text="..." colors={colors} />
 *      Orange Bubble + Arrow-Down (zeigt auf das nächste UI-Element).
 *      Fade-in + Spring-Bounce beim Mount.
 *
 *  - <OnboardingGlow active colors={colors}>{children}</OnboardingGlow>
 *      Pulsierender Border-Glow um das Target. Wenn active=false → Children
 *      werden ohne Extra-View durchgereicht (kein Layout-Shift).
 *
 * Genutzt in:
 *   - app/profile/edit.tsx (Stage 2: Nickname)
 *   - app/(app)/blocker.tsx (Stage 3: Schutz aktivieren)
 */

export function OnboardingTooltip({
  text,
  colors,
  arrowOffset = 22,
}: {
  text: string;
  colors: ColorScheme;
  /** X-Offset des Pfeils unten in px (Default 22 = links-aligned mit etwas Indent). */
  arrowOffset?: number;
}) {
  const opacity = useRef(new Animated.Value(0)).current;
  const translateY = useRef(new Animated.Value(-6)).current;

  useEffect(() => {
    Animated.parallel([
      Animated.timing(opacity, {
        toValue: 1,
        duration: 350,
        useNativeDriver: true,
        easing: Easing.out(Easing.cubic),
      }),
      Animated.spring(translateY, {
        toValue: 0,
        useNativeDriver: true,
        friction: 6,
        tension: 80,
      }),
    ]).start();
  }, []);

  return (
    <Animated.View
      style={{
        opacity,
        transform: [{ translateY }],
        marginBottom: 6,
      }}
    >
      <View
        style={{
          backgroundColor: colors.brandOrange,
          borderRadius: 12,
          paddingVertical: 12,
          paddingHorizontal: 14,
          flexDirection: 'row',
          alignItems: 'flex-start',
          gap: 10,
        }}
      >
        <Ionicons name="sparkles" size={16} color="#ffffff" style={{ marginTop: 2 }} />
        <Text
          style={{
            flex: 1,
            fontFamily: 'Nunito_600SemiBold',
            fontSize: 13,
            lineHeight: 19,
            color: '#ffffff',
          }}
        >
          {text}
        </Text>
      </View>
      {/* Arrow-Down */}
      <View
        style={{
          alignSelf: 'flex-start',
          marginLeft: arrowOffset,
          marginTop: -1,
          width: 0,
          height: 0,
          borderLeftWidth: 8,
          borderRightWidth: 8,
          borderTopWidth: 8,
          borderLeftColor: 'transparent',
          borderRightColor: 'transparent',
          borderTopColor: colors.brandOrange,
        }}
      />
    </Animated.View>
  );
}

export function OnboardingGlow({
  active,
  colors,
  children,
  radius = 14,
}: {
  active: boolean;
  colors: ColorScheme;
  children: React.ReactNode;
  /** Border-Radius. Default 14. Anpassen wenn das Target eckiger/runder ist. */
  radius?: number;
}) {
  const pulse = useRef(new Animated.Value(0)).current;

  useEffect(() => {
    if (!active) return;
    const loop = Animated.loop(
      Animated.sequence([
        Animated.timing(pulse, {
          toValue: 1,
          duration: 1200,
          useNativeDriver: false,
          easing: Easing.inOut(Easing.cubic),
        }),
        Animated.timing(pulse, {
          toValue: 0,
          duration: 1200,
          useNativeDriver: false,
          easing: Easing.inOut(Easing.cubic),
        }),
      ]),
    );
    loop.start();
    return () => loop.stop();
  }, [active]);

  if (!active) return <>{children}</>;

  const borderColor = pulse.interpolate({
    inputRange: [0, 1],
    outputRange: ['rgba(0,122,255,0.35)', 'rgba(0,122,255,0.95)'],
  }) as unknown as string;

  const shadowOpacity = pulse.interpolate({
    inputRange: [0, 1],
    outputRange: [0.15, 0.45],
  }) as unknown as number;

  return (
    <Animated.View
      style={{
        borderRadius: radius,
        borderWidth: 2,
        borderColor,
        padding: 2,
        shadowColor: colors.brandOrange,
        shadowOffset: { width: 0, height: 0 },
        shadowRadius: 12,
        shadowOpacity,
      }}
    >
      {children}
    </Animated.View>
  );
}