import { MoodCheckin, getMoodConfig } from '@/services/moodCheckins';
import dayjs from 'dayjs';
import React from 'react';
import { StyleSheet, Text, View } from 'react-native';

interface MoodHistoryCardProps {
  moodCheckins: MoodCheckin[];
  title?: string;
}

export function MoodHistoryCard({ moodCheckins, title = '心情记录' }: MoodHistoryCardProps) {
  // 计算心情统计
  const moodStats = React.useMemo(() => {
    const stats = {
      total: moodCheckins.length,
      averageIntensity: 0,
      moodDistribution: {} as Record<string, number>,
      mostFrequentMood: '',
    };

    if (moodCheckins.length === 0) return stats;

    // 计算平均强度
    const totalIntensity = moodCheckins.reduce((sum, checkin) => sum + checkin.intensity, 0);
    stats.averageIntensity = Math.round(totalIntensity / moodCheckins.length);

    // 计算心情分布
    moodCheckins.forEach(checkin => {
      const moodLabel = getMoodConfig(checkin.moodType)?.label || checkin.moodType;
      stats.moodDistribution[moodLabel] = (stats.moodDistribution[moodLabel] || 0) + 1;
    });

    // 找出最频繁的心情
    const sortedMoods = Object.entries(stats.moodDistribution)
      .sort(([, a], [, b]) => b - a);
    stats.mostFrequentMood = sortedMoods[0]?.[0] || '';

    return stats;
  }, [moodCheckins]);

  // 获取最近的心情记录
  const recentMoods = moodCheckins
    .sort((a, b) => dayjs(b.createdAt).valueOf() - dayjs(a.createdAt).valueOf())
    .slice(0, 5);

  return (
    <View style={styles.container}>
      <Text style={styles.title}>{title}</Text>

      {moodCheckins.length === 0 ? (
        <View style={styles.emptyState}>
          <Text style={styles.emptyText}>暂无心情记录</Text>
        </View>
      ) : (
        <>
          {/* 统计信息 */}
          <View style={styles.statsContainer}>
            <View style={styles.statItem}>
              <Text style={styles.statValue}>{moodStats.total}</Text>
              <Text style={styles.statLabel}>总记录</Text>
            </View>
            <View style={styles.statItem}>
              <Text style={styles.statValue}>{moodStats.averageIntensity}</Text>
              <Text style={styles.statLabel}>平均强度</Text>
            </View>
            <View style={styles.statItem}>
              <Text style={styles.statValue}>{moodStats.mostFrequentMood}</Text>
              <Text style={styles.statLabel}>最常见</Text>
            </View>
          </View>

          {/* 最近记录 */}
          <View style={styles.recentContainer}>
            <Text style={styles.sectionTitle}>最近记录</Text>
            {recentMoods.map((checkin, index) => {
              const moodConfig = getMoodConfig(checkin.moodType);
              return (
                <View key={checkin.id} style={styles.moodItem}>
                  <View style={styles.moodInfo}>
                    <Text style={styles.moodEmoji}>{moodConfig?.emoji}</Text>
                    <View style={styles.moodDetails}>
                      <Text style={styles.moodLabel}>{moodConfig?.label}</Text>
                      <Text style={styles.moodDate}>
                        {dayjs(checkin.createdAt).format('MM月DD日 HH:mm')}
                      </Text>
                    </View>
                  </View>
                  <View style={styles.moodIntensity}>
                    <Text style={styles.intensityText}>强度 {checkin.intensity}</Text>
                  </View>
                </View>
              );
            })}
          </View>
        </>
      )}
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    backgroundColor: '#FFFFFF',
    borderRadius: 16,
    padding: 16,
    marginBottom: 16,
    shadowColor: '#000',
    shadowOffset: {
      width: 0,
      height: 2,
    },
    shadowOpacity: 0.1,
    shadowRadius: 3.84,
    elevation: 5,
  },
  title: {
    fontSize: 18,
    fontWeight: '600',
    color: '#192126',
    marginBottom: 16,
  },
  emptyState: {
    alignItems: 'center',
    paddingVertical: 32,
  },
  emptyText: {
    fontSize: 14,
    color: '#9CA3AF',
    fontStyle: 'italic',
  },
  statsContainer: {
    flexDirection: 'row',
    justifyContent: 'space-around',
    marginBottom: 20,
    paddingVertical: 16,
    backgroundColor: '#F8F9FA',
    borderRadius: 12,
  },
  statItem: {
    alignItems: 'center',
  },
  statValue: {
    fontSize: 20,
    fontWeight: '700',
    color: '#192126',
    marginBottom: 4,
  },
  statLabel: {
    fontSize: 12,
    color: '#6B7280',
  },
  recentContainer: {
    marginTop: 8,
  },
  sectionTitle: {
    fontSize: 16,
    fontWeight: '600',
    color: '#192126',
    marginBottom: 12,
  },
  moodItem: {
    flexDirection: 'row',
    justifyContent: 'space-between',
    alignItems: 'center',
    paddingVertical: 8,
    borderBottomWidth: 1,
    borderBottomColor: '#F3F4F6',
  },
  moodInfo: {
    flexDirection: 'row',
    alignItems: 'center',
    flex: 1,
  },
  moodEmoji: {
    fontSize: 20,
    marginRight: 12,
  },
  moodDetails: {
    flex: 1,
  },
  moodLabel: {
    fontSize: 14,
    fontWeight: '500',
    color: '#192126',
    marginBottom: 2,
  },
  moodDate: {
    fontSize: 12,
    color: '#6B7280',
  },
  moodIntensity: {
    alignItems: 'flex-end',
  },
  intensityText: {
    fontSize: 12,
    color: '#6B7280',
    fontWeight: '500',
  },
});