import React, { useMemo, useRef, useEffect } from 'react';
import {
  StyleSheet,
  Text,
  View,
  ViewStyle,
  Animated
} from 'react-native';

import { HourlyStepData } from '@/utils/health';
// 使用原生View来替代SVG，避免导入问题
// import Svg, { Rect } from 'react-native-svg';

interface StepsCardProps {
  stepCount: number | null;
  stepGoal: number;
  hourlySteps: HourlyStepData[];
  style?: ViewStyle;
}

const StepsCard: React.FC<StepsCardProps> = ({
  stepCount,
  stepGoal,
  hourlySteps,
  style
}) => {
  // 为每个柱体创建独立的动画值
  const animatedValues = useRef(
    Array.from({ length: 24 }, () => new Animated.Value(0))
  ).current;

  // 计算柱状图数据
  const chartData = useMemo(() => {
    if (!hourlySteps || hourlySteps.length === 0) {
      return Array.from({ length: 24 }, (_, i) => ({ hour: i, steps: 0, height: 0 }));
    }

    // 找到最大步数用于计算高度比例
    const maxSteps = Math.max(...hourlySteps.map(data => data.steps), 1);
    const maxHeight = 20; // 柱状图最大高度（缩小一半）

    return hourlySteps.map(data => ({
      ...data,
      height: maxSteps > 0 ? (data.steps / maxSteps) * maxHeight : 0
    }));
  }, [hourlySteps]);

  // 获取当前小时
  const currentHour = new Date().getHours();

  // 触发柱体动画
  useEffect(() => {
    if (chartData && chartData.length > 0) {
      // 重置所有动画值
      animatedValues.forEach(animValue => animValue.setValue(0));
      
      // 同时启动所有柱体的弹性动画，有步数的柱体才执行动画
      chartData.forEach((data, index) => {
        if (data.steps > 0) {
          Animated.spring(animatedValues[index], {
            toValue: 1,
            tension: 150,
            friction: 8,
            useNativeDriver: false,
          }).start();
        }
      });
    }
  }, [chartData, animatedValues]);

  return (
    <View style={[styles.container, style]}>
      {/* 标题和步数显示 */}
      <View style={styles.header}>
        <Text style={styles.title}>步数</Text>
      </View>

      {/* 柱状图 */}
      <View style={styles.chartContainer}>
        <View style={styles.chartWrapper}>
          <View style={styles.chartArea}>
            {chartData.map((data, index) => {
              // 判断是否是当前小时或者有活动的小时
              const isActive = data.steps > 0;
              const isCurrent = index <= currentHour;

              // 动画变换：缩放从0到实际高度
              const animatedScale = animatedValues[index].interpolate({
                inputRange: [0, 1],
                outputRange: [0, 1],
              });

              // 动画变换：透明度从0到1
              const animatedOpacity = animatedValues[index].interpolate({
                inputRange: [0, 1],
                outputRange: [0, 1],
              });

              return (
                <Animated.View
                  key={`bar-${index}`}
                  style={[
                    styles.chartBar,
                    {
                      height: data.height || 2, // 最小高度2px
                      backgroundColor: isCurrent && isActive ? '#FFC365' : '#FFEBCB',
                      transform: [{ scaleY: animatedScale }],
                      opacity: animatedOpacity,
                    }
                  ]}
                />
              );
            })}
          </View>
        </View>
      </View>

      {/* 步数和目标显示 */}
      <View style={styles.statsContainer}>
        <Text style={styles.stepCount}>
          {stepCount !== null ? stepCount.toLocaleString() : '——'}
        </Text>
      </View>
    </View>
  );
};

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'space-between',
    borderRadius: 20,
    padding: 16,
    shadowColor: '#000',
    shadowOffset: {
      width: 0,
      height: 4,
    },
    shadowOpacity: 0.08,
    shadowRadius: 20,
    elevation: 8,
  },
  header: {
    flexDirection: 'row',
    justifyContent: 'space-between',
    alignItems: 'center',
  },
  title: {
    fontSize: 14,
    color: '#192126',
  },
  footprintIcons: {
    flexDirection: 'row',
    alignItems: 'center',
    gap: 6,
  },
  chartContainer: {
    flex: 1,
    justifyContent: 'center',
  },
  chartWrapper: {
    width: '100%',
    alignItems: 'center',
  },
  chartArea: {
    flexDirection: 'row',
    alignItems: 'flex-end',
    height: 20,
    width: '100%',
    maxWidth: 240,
    justifyContent: 'space-between',
    paddingHorizontal: 4,
  },
  chartBar: {
    width: 4,
    borderRadius: 1,
    alignSelf: 'flex-end',
  },
  statsContainer: {
    alignItems: 'flex-start',
    marginTop: 6
  },
  stepCount: {
    fontSize: 18,
    fontWeight: '600',
    color: '#192126',
  },

});

export default StepsCard;