import { Colors } from '@/constants/Colors';
import { ROUTES } from '@/constants/Routes';
import { useAppDispatch, useAppSelector } from '@/hooks/redux';
import { useAuthGuard } from '@/hooks/useAuthGuard';
import { fetchWeightHistory } from '@/store/userSlice';
import { Ionicons } from '@expo/vector-icons';
import dayjs from 'dayjs';
import React, { useEffect, useState } from 'react';
import {
  Dimensions,
  StyleSheet,
  Text,
  TouchableOpacity,
  View,
} from 'react-native';
import Animated, {
  Extrapolation,
  interpolate,
  runOnJS,
  useAnimatedStyle,
  useSharedValue,
  withTiming,
} from 'react-native-reanimated';
import Svg, { Circle, Line, Path, Text as SvgText } from 'react-native-svg';

const { width: screenWidth } = Dimensions.get('window');
const CARD_WIDTH = screenWidth - 40; // 减去左右边距
const CHART_WIDTH = CARD_WIDTH - 36; // 减去卡片内边距
const CHART_HEIGHT = 100;
const PADDING = 10;


export function WeightHistoryCard() {
  const dispatch = useAppDispatch();
  const userProfile = useAppSelector((s) => s.user.profile);
  const weightHistory = useAppSelector((s) => s.user.weightHistory);
  const [isLoading, setIsLoading] = useState(false);
  const [showChart, setShowChart] = useState(false);

  // 动画相关状态
  const animationProgress = useSharedValue(0);
  const [isAnimating, setIsAnimating] = useState(false);

  const { pushIfAuthedElseLogin } = useAuthGuard();

  const hasWeight = userProfile?.weight && parseFloat(userProfile.weight) > 0;

  useEffect(() => {
    if (hasWeight) {
      loadWeightHistory();
    }
  }, [hasWeight]);

  const loadWeightHistory = async () => {
    try {
      setIsLoading(true);
      await dispatch(fetchWeightHistory() as any);
    } catch (error) {
      console.error('加载体重历史失败:', error);
    } finally {
      setIsLoading(false);
    }
  };

  const navigateToCoach = () => {
    pushIfAuthedElseLogin(ROUTES.TAB_COACH);
  };

  // 切换图表显示状态的动画函数
  const toggleChart = () => {
    if (isAnimating) return; // 防止动画期间重复触发

    setIsAnimating(true);
    const newShowChart = !showChart;
    setShowChart(newShowChart);

    animationProgress.value = withTiming(
      newShowChart ? 1 : 0,
      {
        duration: 350,
      },
      (finished) => {
        if (finished) {
          runOnJS(setIsAnimating)(false);
        }
      }
    );
  };

  // 动画容器的高度动画
  const containerAnimatedStyle = useAnimatedStyle(() => {
    // 只有在展开状态时才应用固定高度
    if (animationProgress.value === 0) {
      return {};
    }

    const height = interpolate(
      animationProgress.value,
      [0, 1],
      [40, 200], // 从摘要高度到图表高度
      Extrapolation.CLAMP
    );

    return {
      height,
    };
  });

  // 摘要信息的动画样式
  const summaryAnimatedStyle = useAnimatedStyle(() => {
    const opacity = interpolate(
      animationProgress.value,
      [0, 0.4, 1],
      [1, 0.2, 0],
      Extrapolation.CLAMP
    );

    const scale = interpolate(
      animationProgress.value,
      [0, 1],
      [1, 0.9],
      Extrapolation.CLAMP
    );

    const translateY = interpolate(
      animationProgress.value,
      [0, 1],
      [0, -20],
      Extrapolation.CLAMP
    );

    return {
      opacity,
      transform: [{ scale }, { translateY }],
    };
  });

  // 图表容器的动画样式
  const chartAnimatedStyle = useAnimatedStyle(() => {
    const opacity = interpolate(
      animationProgress.value,
      [0, 0.6, 1],
      [0, 0.2, 1],
      Extrapolation.CLAMP
    );

    const scale = interpolate(
      animationProgress.value,
      [0, 1],
      [0.9, 1],
      Extrapolation.CLAMP
    );

    const translateY = interpolate(
      animationProgress.value,
      [0, 1],
      [20, 0],
      Extrapolation.CLAMP
    );

    return {
      opacity,
      transform: [{ scale }, { translateY }],
    };
  });

  // 如果正在加载，显示加载状态
  if (isLoading) {
    return (
      <View style={styles.card}>
        <View style={styles.cardHeader}>
          <View style={styles.iconSquare}>
            <Ionicons name="scale-outline" size={18} color="#192126" />
          </View>
          <Text style={styles.cardTitle}>体重记录</Text>
        </View>
        <View style={styles.emptyContent}>
          <Text style={styles.emptyDescription}>加载中...</Text>
        </View>
      </View>
    );
  }

  // 如果没有体重数据，显示引导卡片
  if (!hasWeight) {
    return (
      <View style={styles.card}>
        <View style={styles.cardHeader}>
          <View style={styles.iconSquare}>
            <Ionicons name="scale-outline" size={18} color="#192126" />
          </View>
          <Text style={styles.cardTitle}>体重记录</Text>
        </View>

        <View style={styles.emptyContent}>
          <Text style={styles.emptyTitle}>开始记录你的体重变化</Text>
          <Text style={styles.emptyDescription}>
            记录体重变化，追踪你的健康进展
          </Text>
          <TouchableOpacity
            style={styles.recordButton}
            onPress={navigateToCoach}
            activeOpacity={0.8}
          >
            <Ionicons name="add" size={18} color="#192126" />
            <Text style={styles.recordButtonText}>记录</Text>
          </TouchableOpacity>
        </View>
      </View>
    );
  }

  // 处理体重历史数据
  const sortedHistory = [...weightHistory]
    .sort((a, b) => new Date(a.createdAt).getTime() - new Date(b.createdAt).getTime())
    .slice(-7); // 只显示最近7条记录

  if (sortedHistory.length === 0) {
    return (
      <View style={styles.card}>
        <View style={styles.cardHeader}>
          <View style={styles.iconSquare}>
            <Ionicons name="scale-outline" size={18} color="#192126" />
          </View>
          <Text style={styles.cardTitle}>体重记录</Text>
        </View>

        <View style={styles.emptyContent}>
          <Text style={styles.emptyDescription}>
            暂无体重记录，点击下方按钮开始记录
          </Text>
          <TouchableOpacity
            style={styles.recordButton}
            onPress={navigateToCoach}
            activeOpacity={0.8}
          >
            <Ionicons name="add" size={18} color="#FFFFFF" />
            <Text style={styles.recordButtonText}>记录体重</Text>
          </TouchableOpacity>
        </View>
      </View>
    );
  }

  // 生成图表数据
  const weights = sortedHistory.map(item => parseFloat(item.weight));
  const minWeight = Math.min(...weights);
  const maxWeight = Math.max(...weights);
  const weightRange = maxWeight - minWeight || 1;

  const points = sortedHistory.map((item, index) => {
    const x = PADDING + (index / Math.max(sortedHistory.length - 1, 1)) * (CHART_WIDTH - 2 * PADDING);
    const normalizedWeight = (parseFloat(item.weight) - minWeight) / weightRange;
    // 减少顶部边距，压缩留白
    const y = PADDING + 15 + (1 - normalizedWeight) * (CHART_HEIGHT - 2 * PADDING - 30);
    return { x, y, weight: item.weight, date: item.createdAt };
  });

  // 生成路径
  const pathData = points.map((point, index) => {
    if (index === 0) return `M ${point.x} ${point.y}`;
    return `L ${point.x} ${point.y}`;
  }).join(' ');

  // 如果只有一个数据点，显示为水平线
  const singlePointPath = points.length === 1 ?
    `M ${PADDING} ${points[0].y} L ${CHART_WIDTH - PADDING} ${points[0].y}` :
    pathData;

  return (
    <View style={styles.card}>
      <View style={styles.cardHeader}>
        <View style={styles.iconSquare}>
          <Ionicons name="scale-outline" size={18} color="#192126" />
        </View>
        <Text style={styles.cardTitle}>体重记录</Text>
        <View style={styles.headerButtons}>
          <TouchableOpacity
            style={styles.chartToggleButton}
            onPress={toggleChart}
            activeOpacity={0.8}
          >
            <Ionicons
              name={showChart ? "chevron-up" : "chevron-down"}
              size={16}
              color={Colors.light.primary}
            />
          </TouchableOpacity>
          <TouchableOpacity
            style={styles.addButton}
            onPress={navigateToCoach}
            activeOpacity={0.8}
          >
            <Ionicons name="add" size={16} color={Colors.light.primary} />
          </TouchableOpacity>
        </View>
      </View>

      {/* 动画容器 */}
      {sortedHistory.length > 0 && (
        <Animated.View style={[styles.animationContainer, containerAnimatedStyle]}>
          {/* 默认信息显示 - 带动画 */}
          <Animated.View style={[styles.summaryInfo, summaryAnimatedStyle]}>
            <View style={styles.summaryRow}>
              <View style={styles.summaryItem}>
                <Text style={styles.summaryLabel}>当前体重</Text>
                <Text style={styles.summaryValue}>{userProfile.weight}kg</Text>
              </View>
              <View style={styles.summaryItem}>
                <Text style={styles.summaryLabel}>记录天数</Text>
                <Text style={styles.summaryValue}>{sortedHistory.length}天</Text>
              </View>
              <View style={styles.summaryItem}>
                <Text style={styles.summaryLabel}>变化范围</Text>
                <Text style={styles.summaryValue}>
                  {minWeight.toFixed(1)}-{maxWeight.toFixed(1)}kg
                </Text>
              </View>
            </View>
          </Animated.View>

          {/* 图表容器 - 带动画 */}
          <Animated.View style={[styles.chartContainer, chartAnimatedStyle]}>
            <Svg width={CHART_WIDTH} height={CHART_HEIGHT + 15}>
              {/* 背景网格线 */}
              {[0, 1, 2, 3, 4].map(i => (
                <Line
                  key={`grid-${i}`}
                  x1={PADDING}
                  y1={PADDING + 15 + i * (CHART_HEIGHT - 2 * PADDING - 30) / 4}
                  x2={CHART_WIDTH - PADDING}
                  y2={PADDING + 15 + i * (CHART_HEIGHT - 2 * PADDING - 30) / 4}
                  stroke="#F0F0F0"
                  strokeWidth={1}
                />
              ))}

              {/* 折线 */}
              <Path
                d={singlePointPath}
                stroke={Colors.light.accentGreen}
                strokeWidth={3}
                fill="none"
                strokeLinecap="round"
                strokeLinejoin="round"
              />

              {/* 数据点和标签 */}
              {points.map((point, index) => {
                const isLastPoint = index === points.length - 1;
                const isFirstPoint = index === 0;
                const showLabel = isFirstPoint || isLastPoint || points.length <= 3 || points.length === 1;

                return (
                  <React.Fragment key={index}>
                    <Circle
                      cx={point.x}
                      cy={point.y}
                      r={isLastPoint ? 6 : 4}
                      fill={Colors.light.accentGreen}
                      stroke="#FFFFFF"
                      strokeWidth={2}
                    />
                    {/* 体重标签 - 只在关键点显示 */}
                    {showLabel && (
                      <>
                        <Circle
                          cx={point.x}
                          cy={point.y - 15}
                          r={10}
                          fill="rgba(255,255,255,0.9)"
                          stroke={Colors.light.accentGreen}
                          strokeWidth={1}
                        />
                        <SvgText
                          x={point.x}
                          y={point.y - 12}
                          fontSize="9"
                          fill="#192126"
                          textAnchor="middle"
                        >
                          {point.weight}
                        </SvgText>
                      </>
                    )}
                  </React.Fragment>
                );
              })}


            </Svg>

            {/* 图表底部信息 */}
            <View style={styles.chartInfo}>
              <View style={styles.infoItem}>
                <Text style={styles.infoLabel}>当前体重</Text>
                <Text style={styles.infoValue}>{userProfile.weight}kg</Text>
              </View>
              <View style={styles.infoItem}>
                <Text style={styles.infoLabel}>记录天数</Text>
                <Text style={styles.infoValue}>{sortedHistory.length}天</Text>
              </View>
              <View style={styles.infoItem}>
                <Text style={styles.infoLabel}>变化范围</Text>
                <Text style={styles.infoValue}>
                  {minWeight.toFixed(1)}-{maxWeight.toFixed(1)}kg
                </Text>
              </View>
            </View>

            {/* 最近记录时间 */}
            {sortedHistory.length > 0 && (
              <Text style={styles.lastRecordText}>
                最近记录：{dayjs(sortedHistory[sortedHistory.length - 1].createdAt).format('MM/DD HH:mm')}
              </Text>
            )}
          </Animated.View>
        </Animated.View>
      )}
    </View>
  );
}

const styles = StyleSheet.create({
  card: {
    backgroundColor: '#FFFFFF',
    borderRadius: 22,
    padding: 18,
    marginBottom: 8,
    shadowColor: '#000',
    shadowOffset: { width: 0, height: 2 },
    shadowOpacity: 0.1,
    shadowRadius: 8,
    elevation: 3,
  },
  cardHeader: {
    flexDirection: 'row',
    alignItems: 'center',
    marginBottom: 16,
  },
  iconSquare: {
    width: 30,
    height: 30,
    borderRadius: 8,
    alignItems: 'center',
    justifyContent: 'center',
    marginRight: 10,
  },
  cardTitle: {
    fontSize: 18,
    fontWeight: '800',
    color: '#192126',
    flex: 1,
  },
  headerButtons: {
    flexDirection: 'row',
    alignItems: 'center',
    gap: 8,
  },
  chartToggleButton: {
    width: 28,
    height: 28,
    borderRadius: 14,
    alignItems: 'center',
    justifyContent: 'center',
  },
  addButton: {
    width: 28,
    height: 28,
    borderRadius: 14,
    alignItems: 'center',
    justifyContent: 'center',
  },
  emptyContent: {
    alignItems: 'center',
  },
  emptyTitle: {
    fontSize: 16,
    fontWeight: '700',
    color: '#192126',
    marginBottom: 6,
  },
  emptyDescription: {
    fontSize: 14,
    color: '#687076',
    textAlign: 'center',
    marginBottom: 16,
    lineHeight: 20,
  },
  recordButton: {
    flexDirection: 'row',
    alignItems: 'center',
    backgroundColor: Colors.light.accentGreen,
    paddingHorizontal: 16,
    paddingVertical: 10,
    borderRadius: 20,
    gap: 6,
  },
  recordButtonText: {
    color: '#192126',
    fontSize: 14,
    fontWeight: '700',
  },
  animationContainer: {
    position: 'relative',
    overflow: 'hidden',
    minHeight: 40,
  },
  summaryInfo: {
    position: 'absolute',
    width: '100%',
  },
  chartContainer: {
    position: 'absolute',
    width: '100%',
    alignItems: 'center',
    minHeight: 100,
  },
  chartInfo: {
    flexDirection: 'row',
    justifyContent: 'space-around',
    width: '100%',
    paddingTop: 16,
    borderTopWidth: 1,
    borderTopColor: '#F0F0F0',
  },
  infoItem: {
    alignItems: 'center',
  },
  infoLabel: {
    fontSize: 12,
    color: '#687076',
    marginBottom: 4,
  },
  infoValue: {
    fontSize: 14,
    fontWeight: '700',
    color: '#192126',
  },
  lastRecordText: {
    fontSize: 12,
    color: '#687076',
    textAlign: 'center',
    marginTop: 4,
  },
  summaryRow: {
    flexDirection: 'row',
    justifyContent: 'space-around',
    marginBottom: 0,
  },
  summaryItem: {
    alignItems: 'center',
  },
  summaryLabel: {
    fontSize: 12,
    color: '#687076',
    marginBottom: 4,
  },
  summaryValue: {
    fontSize: 14,
    fontWeight: '700',
    color: '#192126',
  },
});