import { Image } from 'expo-image';
import React, { useEffect, useRef, useState } from 'react';
import { Animated, Easing, ImageBackground, StyleSheet, Text, View } from 'react-native';

import { Images } from '@/constants/images';

interface BarrageItemType {
  id?: string;
  poolId?: string;
  nickname?: string;
  poolName?: string;
  text?: string; // amount or feedback
  type?: string; // '奖池'
  avatar?: string;
}

interface BarrageProps {
  data: BarrageItemType[];
  speed?: number; // ms per pixel? Or just a factor.
  style?: any;
}

export const Barrage: React.FC<BarrageProps> = ({ data, speed = 30, style }) => {
  const [contentWidth, setContentWidth] = useState(0);
  const translateX = useRef(new Animated.Value(0)).current;

  useEffect(() => {
    if (contentWidth > 0 && data.length > 0) {
      startAnimation();
    }
  }, [contentWidth, data]);

  const startAnimation = () => {
    // Reset to 0
    translateX.setValue(0);
    
    // Duration: width * factor. 
    // If width is 1000, speed 30 -> 30000ms (30s).
    const duration = contentWidth * speed;

    Animated.loop(
      Animated.timing(translateX, {
        toValue: -contentWidth,
        duration: duration,
        easing: Easing.linear,
        useNativeDriver: true,
      })
    ).start();
  };

  const renderItem = (item: BarrageItemType, index: number) => {
    const isPool = item.poolId && Number(item.text || '0') > 0;
    // item.type == '奖池' logic from Vue
    
    return (
      <ImageBackground
        key={`${item.id || index}-main`}
        source={{ uri: Images.box.barrageItem }}
        style={styles.itemBg}
        resizeMode="stretch"
      >
        <View style={styles.contentRow}>
            {/* Avatar */}
            <View style={styles.avatarBox}>
                <Image source={{ uri: item.avatar }} style={styles.avatar} contentFit="cover" />
            </View>
            
            {/* Text Content */}
            <View style={styles.textContainer}>
                {isPool ? (
                    <Text style={styles.text} numberOfLines={1}>
                        <Text style={styles.nickname}>{item.nickname?.slice(0,1) + '***' + item.nickname?.slice(-1)}</Text>
                        <Text> 在 </Text>
                        <Text style={styles.poolName}>{item.poolName}</Text>
                        <Text> {item.type === '奖池' ? '消费了' : '获得'} </Text>
                        <Text style={styles.amount}>{item.text}</Text>
                        <Text> {item.type === '奖池' ? '元' : ''} </Text>
                    </Text>
                ) : (
                   <Text style={styles.text} numberOfLines={1}>
                       <Text style={styles.nickname}>{item.nickname?.slice(0,1) + '***' + item.nickname?.slice(-1)}</Text>
                       <Text>: {item.text}</Text>
                   </Text>
                )}
            </View>
        </View>
      </ImageBackground>
    );
  };

  if (!data || data.length === 0) return null;

  return (
    <View style={[styles.container, style]}>
      <Animated.View
        style={[
          styles.scrollContainer,
          { transform: [{ translateX }] },
        ]}
      >
        {/* Measure the width of the first set */}
        <View 
            style={styles.row} 
            onLayout={(e) => setContentWidth(e.nativeEvent.layout.width)}
        >
            {data.map((item, index) => renderItem(item, index))}
        </View>
        {/* Duplicate set for seamless loop */}
        <View style={styles.row}>
            {data.map((item, index) => renderItem(item, index))}
        </View>
      </Animated.View>
    </View>
  );
};

const styles = StyleSheet.create({
  container: {
    width: '100%',
    overflow: 'hidden',
    height: 40, // Adjust based on item height
  },
  scrollContainer: {
    flexDirection: 'row',
  },
  row: {
    flexDirection: 'row',
    alignItems: 'center',
  },
  itemBg: {
    paddingHorizontal: 12, // Reduced padding
    paddingVertical: 4,
    marginRight: 10,
    justifyContent: 'center',
    height: 32, // Fixed height
    minWidth: 150,
  },
  contentRow: {
      flexDirection: 'row',
      alignItems: 'center',
  },
  avatarBox: {
      marginRight: 6,
      width: 24,
      height: 24,
      borderRadius: 12,
      borderWidth: 1,
      borderColor: '#000',
      overflow: 'hidden',
      backgroundColor: '#fff',
  },
  avatar: {
      width: '100%',
      height: '100%',
  },
  textContainer: {
      justifyContent: 'center',
  },
  text: {
      color: '#fff',
      fontSize: 10,
  },
  nickname: {
      fontWeight: 'bold',
  },
  poolName: {
      color: '#0084FF',
      fontSize: 10,
  },
  amount: {
      color: '#FF0000',
      fontSize: 11,
      fontWeight: 'bold',
  }
});