import { ThemedText } from '@/components/ThemedText';
import { useAppDispatch } from '@/hooks/redux';
import { takeMedicationAction } from '@/store/medicationsSlice';
import type { MedicationDisplayItem } from '@/types/medication';
import { Ionicons } from '@expo/vector-icons';
import dayjs, { Dayjs } from 'dayjs';
import { GlassView, isLiquidGlassAvailable } from 'expo-glass-effect';
import { Image } from 'expo-image';
import React, { useEffect, useState } from 'react';
import { Alert, StyleSheet, TouchableOpacity, View } from 'react-native';

export type MedicationCardProps = {
  medication: MedicationDisplayItem;
  colors: (typeof import('@/constants/Colors').Colors)[keyof typeof import('@/constants/Colors').Colors];
  selectedDate: Dayjs;
  onOpenDetails?: (medication: MedicationDisplayItem) => void;
};

export function MedicationCard({ medication, colors, selectedDate, onOpenDetails }: MedicationCardProps) {
  const dispatch = useAppDispatch();
  const [isSubmitting, setIsSubmitting] = useState(false);
  const [imageError, setImageError] = useState(false);
  
  const scheduledDate = dayjs(`${selectedDate.format('YYYY-MM-DD')} ${medication.scheduledTime}`);
  const timeDiffMinutes = scheduledDate.diff(dayjs(), 'minute');

  // 当药品变化时重置图片错误状态
  useEffect(() => {
    setImageError(false);
  }, [medication.id]);

  /**
   * 处理服药操作
   */
  const handleTakeMedication = async () => {
    // 检查 recordId 是否存在
    if (!medication.recordId || isSubmitting) {
      return;
    }

    // 判断是否早于服药时间1小时以上
    if (timeDiffMinutes > 60) {
      // 显示二次确认弹窗
      Alert.alert(
        '尚未到服药时间',
        `该用药计划在 ${medication.scheduledTime}，现在还早于1小时以上。\n\n是否确认已服用此药物？`,
        [
          {
            text: '取消',
            style: 'cancel',
            onPress: () => {
              // 用户取消，不执行任何操作
              console.log('用户取消提前服药');
            },
          },
          {
            text: '确认已服用',
            style: 'default',
            onPress: () => {
              // 用户确认，执行服药逻辑
              executeTakeMedication(medication.recordId!);
            },
          },
        ]
      );
    } else {
      // 在正常时间范围内，直接执行服药逻辑
      executeTakeMedication(medication.recordId);
    }
  };

  /**
   * 执行服药操作（提取公共逻辑）
   */
  const executeTakeMedication = async (recordId: string) => {
    setIsSubmitting(true);
    
    try {
      // 调用 Redux action 标记为已服用
      await dispatch(takeMedicationAction({
        recordId: recordId,
        actualTime: new Date().toISOString(),
      })).unwrap();
      
      // 可选：显示成功提示
      // Alert.alert('服药成功', '已记录本次服药');
    } catch (error) {
      console.error('[MEDICATION_CARD] 服药操作失败', error);
      Alert.alert(
        '操作失败',
        error instanceof Error ? error.message : '记录服药时发生错误，请稍后重试',
        [{ text: '确定' }]
      );
    } finally {
      setIsSubmitting(false);
    }
  };

  const renderStatusBadge = () => {
    if (medication.status === 'missed') {
      return (
        <View style={[styles.statusChip, styles.statusChipMissed]}>
          <ThemedText style={styles.statusChipText}>已错过</ThemedText>
        </View>
      );
    }

    if (medication.status === 'upcoming') {
      if (timeDiffMinutes <= 0) {
        return (
          <View style={[styles.statusChip, styles.statusChipUpcoming]}>
            <Ionicons name="time-outline" size={14} color="#fff" />
            <ThemedText style={styles.statusChipText}>到服药时间</ThemedText>
          </View>
        );
      }

      const hours = Math.floor(timeDiffMinutes / 60);
      const minutes = timeDiffMinutes % 60;
      const formatted =
        hours > 0 ? `${hours}小时${minutes > 0 ? `${minutes}分钟` : ''}` : `${minutes}分钟`;

      return (
        <View style={[styles.statusChip, styles.statusChipUpcoming]}>
          <Ionicons name="time-outline" size={14} color="#fff" />
          <ThemedText style={styles.statusChipText}>剩余 {formatted}</ThemedText>
        </View>
      );
    }

    return null;
  };

  const renderAction = () => {
    if (medication.status === 'taken') {
      return (
        <View style={[styles.actionButton, styles.actionButtonTaken]}>
          <Ionicons name="checkmark-circle" size={18} color="#fff" />
          <ThemedText style={styles.actionButtonText}>已服用</ThemedText>
        </View>
      );
    }

    // 只要没有服药，都可以显示立即服用
    return (
      <TouchableOpacity
        activeOpacity={0.7}
        onPress={handleTakeMedication}
        disabled={isSubmitting}
      >
        {isLiquidGlassAvailable() ? (
          <GlassView
            style={[styles.actionButton, styles.actionButtonUpcoming]}
            glassEffectStyle="clear"
            tintColor="rgba(19, 99, 255, 0.3)"
            isInteractive={!isSubmitting}
          >
            <ThemedText style={styles.actionButtonText}>
              {isSubmitting ? '提交中...' : '立即服用'}
            </ThemedText>
          </GlassView>
        ) : (
          <View style={[styles.actionButton, styles.actionButtonUpcoming, styles.fallbackActionButton]}>
            <ThemedText style={styles.actionButtonText}>
              {isSubmitting ? '提交中...' : '立即服用'}
            </ThemedText>
          </View>
        )}
      </TouchableOpacity>
    );
  };

  const statusChip = renderStatusBadge();


  return (
    <TouchableOpacity
      style={[styles.card, { shadowColor: colors.text }]}
      activeOpacity={onOpenDetails ? 0.92 : 1}
      onPress={() => onOpenDetails?.(medication)}
      disabled={!onOpenDetails}
    >
      <View style={[styles.cardSurface, { backgroundColor: colors.surface }]}>
        {statusChip ? <View style={styles.statusChipWrapper}>{statusChip}</View> : null}
        <View style={styles.cardBody}>
          <View style={styles.cardContent}>
            <View style={styles.thumbnailWrapper}>
              <View style={styles.thumbnailSurface}>
                <Image
                  source={medication.image}
                  style={styles.thumbnailImage}
                  onError={() => setImageError(true)}
                  key={medication.id} // 重新渲染时重置状态
                />
              </View>
            </View>
            <View style={styles.infoSection}>
              <ThemedText style={[styles.cardTitle, { color: colors.text }]}>
                {medication.name}
              </ThemedText>
              <ThemedText style={[styles.cardDosage, { color: colors.textSecondary }]}>
                {medication.dosage}
              </ThemedText>
              <View style={styles.scheduleRow}>
                <Ionicons
                  name="time-outline"
                  size={14}
                  color={colors.textSecondary}
                  style={styles.scheduleIcon}
                />
                <ThemedText style={[styles.cardSchedule, { color: colors.textSecondary }]}>
                  {medication.scheduledTime} | {medication.frequency}
                </ThemedText>
              </View>
              <View style={styles.actionContainer}>{renderAction()}</View>
            </View>
          </View>
        </View>
      </View>
    </TouchableOpacity>
  );
}

const styles = StyleSheet.create({
  card: {
    borderRadius: 18,
    position: 'relative',
  },
  cardSurface: {
    borderRadius: 18,
    overflow: 'hidden',
  },
  cardBody: {
    paddingHorizontal: 10,
    paddingBottom: 10,
    paddingTop: 10,
  },
  cardContent: {
    flexDirection: 'row',
    alignItems: 'center',
    gap: 20,
  },
  thumbnailWrapper: {
    width: 148,
    height: 110,
  },
  thumbnailSurface: {
    flex: 1,
    backgroundColor: '#F1F4FF',
    alignItems: 'center',
    justifyContent: 'center',
    overflow: 'hidden',
    borderRadius: 18,
  },
  thumbnailImage: {
    width: '70%',
    height: '70%',
    resizeMode: 'contain',
  },
  infoSection: {
    flex: 1,
  },
  cardTitle: {
    fontSize: 16,
    fontWeight: '700',
  },
  cardDosage: {
    fontSize: 12,
    marginTop: 4,
  },
  scheduleRow: {
    flexDirection: 'row',
    alignItems: 'center',
    gap: 6,
  },
  cardSchedule: {
    fontSize: 12,
  },
  scheduleIcon: {
    marginTop: -1,
  },
  actionContainer: {
    marginTop: 8,
  },
  actionButton: {
    alignSelf: 'stretch',
    flexDirection: 'row',
    alignItems: 'center',
    gap: 6,
    justifyContent: 'center',
    height: 38,
    borderRadius: 10,
    overflow: 'hidden',
  },
  actionButtonUpcoming: {
    backgroundColor: '#1363FF',
  },
  actionButtonTaken: {
    backgroundColor: '#1FBF4B',
  },
  actionButtonMissed: {
    backgroundColor: '#9CA3AF',
  },
  fallbackActionButton: {
    borderWidth: 1,
    borderColor: 'rgba(19, 99, 255, 0.3)',
    backgroundColor: 'rgba(19, 99, 255, 0.9)',
  },
  fallbackActionButtonMissed: {
    borderWidth: 1,
    borderColor: 'rgba(156, 163, 175, 0.3)',
    backgroundColor: 'rgba(156, 163, 175, 0.9)',
  },
  actionButtonText: {
    fontSize: 14,
    fontWeight: '700',
    color: '#fff',
  },
  actionButtonTextMissed: {
    fontSize: 14,
    fontWeight: '700',
    color: '#fff',
  },
  statusChipWrapper: {
    position: 'absolute',
    top: 0,
    right: 0,
  },
  statusChip: {
    flexDirection: 'row',
    alignItems: 'center',
    gap: 6,
    paddingHorizontal: 10,
    height: 28,
    borderBottomLeftRadius: 20,
    borderTopRightRadius: 0,
    borderBottomRightRadius: 0,
    backgroundColor: '#1363FF',
  },
  statusChipUpcoming: {
    backgroundColor: '#1363FF',
  },
  statusChipMissed: {
    backgroundColor: '#FF3B30',
  },
  statusChipText: {
    fontSize: 10,
    fontWeight: '600',
    color: '#fff',
  },
});