import ActivityHeatMap from '@/components/ActivityHeatMap';
import { PRIVACY_POLICY_URL, USER_AGREEMENT_URL } from '@/constants/Agree';
import { Colors } from '@/constants/Colors';
import { getTabBarBottomPadding } from '@/constants/TabBar';
import { useAppDispatch, useAppSelector } from '@/hooks/redux';
import { useAuthGuard } from '@/hooks/useAuthGuard';
import { useColorScheme } from '@/hooks/useColorScheme';
import { DEFAULT_MEMBER_NAME, fetchActivityHistory, fetchMyProfile } from '@/store/userSlice';
import { Ionicons } from '@expo/vector-icons';
import { useBottomTabBarHeight } from '@react-navigation/bottom-tabs';
import { useFocusEffect } from '@react-navigation/native';
import React, { useMemo, useState } from 'react';
import { Image, Linking, SafeAreaView, ScrollView, StatusBar, StyleSheet, Switch, Text, TouchableOpacity, View } from 'react-native';
import { useSafeAreaInsets } from 'react-native-safe-area-context';

const DEFAULT_AVATAR_URL = 'https://plates-1251306435.cos.ap-guangzhou.myqcloud.com/images/avatar/avatarGirl01.jpeg';

export default function PersonalScreen() {
  const dispatch = useAppDispatch();
  const { confirmLogout, confirmDeleteAccount, isLoggedIn, pushIfAuthedElseLogin } = useAuthGuard();
  const insets = useSafeAreaInsets();
  const tabBarHeight = useBottomTabBarHeight();
  const colorScheme = useColorScheme();
  const [notificationEnabled, setNotificationEnabled] = useState(true);

  // 计算底部间距
  const bottomPadding = useMemo(() => {
    return getTabBarBottomPadding(tabBarHeight) + (insets?.bottom ?? 0);
  }, [tabBarHeight, insets?.bottom]);

  // 颜色主题
  const colors = Colors[colorScheme ?? 'light'];

  // 直接使用 Redux 中的用户信息，避免重复状态管理
  const userProfile = useAppSelector((state) => state.user.profile);

  // 页面聚焦时获取最新用户信息
  useFocusEffect(
    React.useCallback(() => {
      dispatch(fetchMyProfile());
      dispatch(fetchActivityHistory())
    }, [dispatch])
  );

  // 数据格式化函数
  const formatHeight = () => {
    if (userProfile.height == null) return '--';
    return `${parseFloat(userProfile.height).toFixed(1)}cm`;
  };

  const formatWeight = () => {
    if (userProfile.weight == null) return '--';
    return `${parseFloat(userProfile.weight).toFixed(1)}kg`;
  };

  const formatAge = () => {
    if (!userProfile.birthDate) return '--';
    const birthDate = new Date(userProfile.birthDate);
    const today = new Date();
    const age = today.getFullYear() - birthDate.getFullYear();
    return `${age}岁`;
  };

  // 显示名称
  const displayName = (userProfile.name?.trim()) ? userProfile.name : DEFAULT_MEMBER_NAME;

  // 用户信息头部
  const UserHeader = () => (
    <View style={styles.sectionContainer}>
      <Text style={styles.sectionTitle}>个人信息</Text>
      <View style={styles.cardContainer}>
        <View style={styles.userInfoContainer}>
          <View style={styles.avatarContainer}>
            <Image 
              source={{ uri: userProfile.avatar || DEFAULT_AVATAR_URL }} 
              style={styles.avatar} 
            />
          </View>
          <View style={styles.userDetails}>
            <Text style={styles.userName}>{displayName}</Text>
          </View>
          <TouchableOpacity style={styles.editButton} onPress={() => pushIfAuthedElseLogin('/profile/edit')}>
            <Text style={styles.editButtonText}>编辑</Text>
          </TouchableOpacity>
        </View>
      </View>
    </View>
  );

  // 数据统计部分
  const StatsSection = () => (
    <View style={styles.sectionContainer}>
      <Text style={styles.sectionTitle}>身体数据</Text>
      <View style={styles.cardContainer}>
        <View style={styles.statsContainer}>
          <View style={styles.statItem}>
            <Text style={styles.statValue}>{formatHeight()}</Text>
            <Text style={styles.statLabel}>身高</Text>
          </View>
          <View style={styles.statItem}>
            <Text style={styles.statValue}>{formatWeight()}</Text>
            <Text style={styles.statLabel}>体重</Text>
          </View>
          <View style={styles.statItem}>
            <Text style={styles.statValue}>{formatAge()}</Text>
            <Text style={styles.statLabel}>年龄</Text>
          </View>
        </View>
      </View>
    </View>
  );

  // 菜单项组件
  const MenuSection = ({ title, items }: { title: string; items: any[] }) => (
    <View style={styles.sectionContainer}>
      <Text style={styles.sectionTitle}>{title}</Text>
      <View style={styles.cardContainer}>
        {items.map((item, index) => (
          <TouchableOpacity
            key={index}
            style={[styles.menuItem, index === items.length - 1 && { borderBottomWidth: 0 }]}
            onPress={item.type === 'switch' ? undefined : item.onPress}
            disabled={item.type === 'switch'}
          >
            <View style={styles.menuItemLeft}>
              <View style={[
                styles.iconContainer,
                { backgroundColor: item.isDanger ? 'rgba(255,68,68,0.1)' : 'rgba(147, 112, 219, 0.1)' }
              ]}>
                <Ionicons
                  name={item.icon}
                  size={20}
                  color={item.isDanger ? '#FF4444' : '#9370DB'}
                />
              </View>
              <Text style={styles.menuItemText}>{item.title}</Text>
            </View>
            {item.type === 'switch' ? (
              <Switch
                value={isLoggedIn ? notificationEnabled : false}
                onValueChange={(value) => {
                  if (!isLoggedIn) {
                    pushIfAuthedElseLogin('/profile/notification-settings');
                    return;
                  }
                  setNotificationEnabled(value);
                }}
                trackColor={{ false: '#E5E5E5', true: '#9370DB' }}
                thumbColor="#FFFFFF"
                style={styles.switch}
              />
            ) : (
              <Ionicons name="chevron-forward" size={20} color="#CCCCCC" />
            )}
          </TouchableOpacity>
        ))}
      </View>
    </View>
  );

  // 菜单项配置
  const menuSections = [
    {
      title: '账户',
      items: [
        {
          icon: 'flag-outline' as const,
          title: '目标管理',
          onPress: () => pushIfAuthedElseLogin('/profile/goals'),
        },
      ],
    },
    {
      title: '通知',
      items: [
        {
          icon: 'notifications-outline' as const,
          title: '消息推送',
          type: 'switch' as const,
        },
      ],
    },
    {
      title: '其他',
      items: [
        {
          icon: 'shield-checkmark-outline' as const,
          title: '隐私政策',
          onPress: () => Linking.openURL(PRIVACY_POLICY_URL),
        },
        {
          icon: 'document-text-outline' as const,
          title: '用户协议',
          onPress: () => Linking.openURL(USER_AGREEMENT_URL),
        },
      ],
    },
    // 只有登录用户才显示账号与安全菜单
    ...(isLoggedIn ? [{
      title: '账号与安全',
      items: [
        {
          icon: 'log-out-outline' as const,
          title: '退出登录',
          onPress: confirmLogout,
          isDanger: false,
        },
        {
          icon: 'trash-outline' as const,
          title: '注销帐号',
          onPress: confirmDeleteAccount,
          isDanger: true,
        },
      ],
    }] : []),
  ];

  return (
    <View style={styles.container}>
      <StatusBar barStyle={'dark-content'} backgroundColor="transparent" translucent />
      <SafeAreaView style={styles.safeArea}>
        <ScrollView
          style={styles.scrollView}
          contentContainerStyle={{ paddingBottom: bottomPadding }}
          showsVerticalScrollIndicator={false}
        >
          <UserHeader />
          <StatsSection />
          <ActivityHeatMap />
          {menuSections.map((section, index) => (
            <MenuSection key={index} title={section.title} items={section.items} />
          ))}
        </ScrollView>
      </SafeAreaView>
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#FAFAFA',
  },
  safeArea: {
    flex: 1,
  },
  scrollView: {
    flex: 1,
    paddingHorizontal: 16,
    paddingTop: 16,
  },
  // 部分容器
  sectionContainer: {
    marginBottom: 20,
  },
  sectionTitle: {
    fontSize: 16,
    fontWeight: 'bold',
    color: '#2C3E50',
    marginBottom: 10,
    paddingHorizontal: 4,
  },
  // 卡片容器
  cardContainer: {
    backgroundColor: '#FFFFFF',
    borderRadius: 12,
    shadowColor: '#000',
    shadowOffset: { width: 0, height: 1 },
    shadowOpacity: 0.05,
    shadowRadius: 4,
    elevation: 2,
    overflow: 'hidden',
  },
  // 用户信息区域
  userInfoContainer: {
    flexDirection: 'row',
    alignItems: 'center',
    padding: 16,
  },
  avatarContainer: {
    marginRight: 12,
  },
  avatar: {
    width: 60,
    height: 60,
    borderRadius: 30,
    borderWidth: 2,
    borderColor: '#9370DB',
  },
  userDetails: {
    flex: 1,
  },
  userName: {
    fontSize: 18,
    fontWeight: 'bold',
    color: '#2C3E50',
    marginBottom: 4,
  },
  userRole: {
    fontSize: 14,
    color: '#9370DB',
    fontWeight: '500',
  },
  editButton: {
    backgroundColor: '#9370DB',
    paddingHorizontal: 16,
    paddingVertical: 8,
    borderRadius: 16,
  },
  editButtonText: {
    color: '#FFFFFF',
    fontSize: 14,
    fontWeight: '600',
  },
  // 数据统计
  statsContainer: {
    flexDirection: 'row',
    justifyContent: 'space-between',
    padding: 16,
  },
  statItem: {
    alignItems: 'center',
    flex: 1,
  },
  statValue: {
    fontSize: 18,
    fontWeight: 'bold',
    color: '#9370DB',
    marginBottom: 4,
  },
  statLabel: {
    fontSize: 12,
    color: '#6C757D',
    fontWeight: '500',
  },
  // 菜单项
  menuItem: {
    flexDirection: 'row',
    alignItems: 'center',
    justifyContent: 'space-between',
    paddingVertical: 14,
    paddingHorizontal: 16,
    borderBottomWidth: 1,
    borderBottomColor: '#F1F3F4',
  },
  menuItemLeft: {
    flexDirection: 'row',
    alignItems: 'center',
    flex: 1,
  },
  iconContainer: {
    width: 32,
    height: 32,
    borderRadius: 6,
    alignItems: 'center',
    justifyContent: 'center',
    marginRight: 12,
  },
  menuItemText: {
    fontSize: 15,
    color: '#2C3E50',
    fontWeight: '500',
  },
  switch: {
    transform: [{ scaleX: 0.8 }, { scaleY: 0.8 }],
  },
});