import { Image } from 'expo-image';
import { useRouter } from 'expo-router';
import React, { useCallback, useEffect, useRef, useState } from 'react';
import {
    ActivityIndicator,
    Dimensions,
    ImageBackground,
    RefreshControl,
    ScrollView,
    StatusBar,
    StyleSheet,
    Text,
    TextInput,
    TouchableOpacity,
    View,
    Platform,
} from 'react-native';
import { useSafeAreaInsets } from 'react-native-safe-area-context';

import { Images } from '@/constants/images';
import { getRoomTypePermission, getWealList } from '@/services/dimension';
import { RuleModal, RuleModalRef } from './components/RuleModal';

interface RoomItem {
  id: string;
  name: string;
  type: string;
  goodsQuantity: number;
  officialFlag: number;
  user: { avatar: string; username: string };
  luckRoomGoodsList: { spu: { cover: string } }[];

  participatingList: any[];
  mode?: string;
}

export default function RoomScreen() {
  const router = useRouter();
  const insets = useSafeAreaInsets();
  const [loading, setLoading] = useState(true);
  const [refreshing, setRefreshing] = useState(false);
  const [list, setList] = useState<RoomItem[]>([]);
  const [searchVal, setSearchVal] = useState('');
  const [type, setType] = useState('');
  const [typeIndex, setTypeIndex] = useState(0);
  const [scrollTop, setScrollTop] = useState(0);
  const [roomTab, setRoomTab] = useState([
    { name: '全部', value: '' }
  ]);
  const ruleRef = useRef<RuleModalRef>(null);

  const loadPermission = async () => {
    try {
      const permission = await getRoomTypePermission();
      let tabs = [{ name: '全部', value: '' }];
      if (permission && permission.roomConfig !== 0) {
        tabs.push({ name: '福利房', value: 'COMMON' });
        tabs.push({ name: '口令房', value: 'PASSWORD' });
      }
      if (permission && permission.roomGAS !== 0) {
        tabs.push({ name: '欧气房', value: 'EUROPEAN_GAS' });
      }
      if (permission && permission.roomCjf !== 0) {
        tabs.push({ name: '成就房', value: 'ACHIEVEMENT' });
      }
      setRoomTab(tabs);
    } catch (error) {
      console.error('获取房间类型权限失败:', error);
    }
  };

  const loadData = useCallback(async (isRefresh = false) => {
    if (isRefresh) setRefreshing(true);
    else setLoading(true);
    try {
      const data = await getWealList(1, 20, searchVal, type);
      setList(data || []);
    } catch (error) {
      console.error('加载房间列表失败:', error);
    }
    setLoading(false);
    setRefreshing(false);
  }, [type, searchVal]);

  useEffect(() => {
    loadPermission();
  }, []);

  useEffect(() => {
    loadData();
  }, [type]);

  const handleSearch = () => {
    loadData();
  };

  const handleTypeChange = (item: any, index: number) => {
    setTypeIndex(index);
    setType(item.value);
  };

  const handleRoomPress = (item: RoomItem) => {
    if (item.mode === 'YFS_PRO') {
        router.push({ pathname: '/award-detail-yfs', params: { id: item.id } } as any);
    } else {
        router.push({ pathname: '/dimension/detail', params: { id: item.id } } as any);
    }
  };

  const isItemType = (type: string) => {
    const map: Record<string, string> = {
      COMMON: '福利房',
      PASSWORD: '口令房',
      EUROPEAN_GAS: '欧气房',
      ACHIEVEMENT: '成就房',
    };
    return map[type] || type;
  };

  const headerBg = scrollTop > 0 ? '#333' : 'transparent';

  return (
    <View style={styles.container}>
      <StatusBar barStyle="light-content" />
      <ImageBackground source={{ uri: Images.mine.kaixinMineBg }} style={styles.background} resizeMode="cover">
        {/* 顶部导航 */}
        <View style={[styles.header, { paddingTop: insets.top, backgroundColor: headerBg }]}>
          <TouchableOpacity style={styles.backBtn} onPress={() => router.back()}>
            <Text style={styles.backText}>←</Text>
          </TouchableOpacity>
          <Text style={styles.title}>房间</Text>
          <View style={styles.placeholder} />
        </View>

        {/* 头部背景 */}
        <ImageBackground source={{ uri: Images.mine.kaixinMineHeadBg }} style={styles.headBg} resizeMode="cover" />

        <ScrollView
          style={styles.scrollView}
          showsVerticalScrollIndicator={false}
          onScroll={(e) => setScrollTop(e.nativeEvent.contentOffset.y)}
          scrollEventThrottle={16}
          refreshControl={<RefreshControl refreshing={refreshing} onRefresh={() => loadData(true)} tintColor="#fff" />}
        >
          <View style={{ height: 90 + insets.top }} />

          {/* iOS 特有免责声明 (应 Apple 审核要求显眼展示) */}
          {Platform.OS === 'ios' && (
             <View style={{ paddingHorizontal: 15, marginBottom: 15, alignItems: 'center' }}>
               <Text style={{ color: 'rgba(255,255,255,0.4)', fontSize: 10, textAlign: 'center' }}>
                 特别声明：本平台所有活动与苹果公司（Apple Inc.）无关
               </Text>
             </View>
          )}

          {/* 搜索栏和功能按钮 */}
          <View style={styles.topSection}>
            <ImageBackground source={{ uri: Images.welfare.roomInputBg }} style={styles.searchBox} resizeMode="stretch">
              <Image source={{ uri: Images.home.search2 }} style={styles.searchIcon} contentFit="contain" />
              <TextInput
                style={styles.searchInput}
                placeholder="搜索"
                placeholderTextColor="#6C6C6C"
                value={searchVal}
                onChangeText={setSearchVal}
                onSubmitEditing={handleSearch}
                returnKeyType="search"
              />
            </ImageBackground>
            <View style={styles.funcBtns}>
              <TouchableOpacity style={styles.funcItem} onPress={() => router.push('/dimension/create' as any)}>
                <Image source={{ uri: Images.welfare.roomIcon0 }} style={styles.funcIcon} contentFit="contain" />
                <Text style={styles.funcText}>创建</Text>
              </TouchableOpacity>
              <TouchableOpacity style={styles.funcItem} onPress={() => router.push('/dimension/record' as any)}>
                <Image source={{ uri: Images.welfare.roomIcon1 }} style={styles.funcIcon} contentFit="contain" />
                <Text style={styles.funcText}>我的</Text>
              </TouchableOpacity>
              <TouchableOpacity style={styles.funcItem} onPress={() => ruleRef.current?.show()}>
                <Image source={{ uri: Images.welfare.roomIcon2 }} style={styles.funcIcon} contentFit="contain" />
                <Text style={styles.funcText}>玩法</Text>
              </TouchableOpacity>
            </View>
          </View>

          {/* 类型切换 */}
          <View style={styles.typeContainer}>
            <ScrollView horizontal showsHorizontalScrollIndicator={false} style={styles.typeSection}>
              {roomTab.map((item, index) => (
                <TouchableOpacity
                  key={index}
                  style={styles.typeItem}
                  onPress={() => handleTypeChange(item, index)}
                >
                  <Text style={[styles.typeText, typeIndex === index && styles.typeTextActive]}>{item.name}</Text>
                  {typeIndex === index && (
                      <>
                        <Image source={{ uri: Images.mine.typeSelectIconT }} style={styles.typeSelectIconT} />
                        <Image source={{ uri: Images.mine.typeSelectIconB }} style={styles.typeSelectIconB} />
                      </>
                  )}
                </TouchableOpacity>
              ))}
            </ScrollView>
          </View>

          {/* 房间列表 */}
          {loading ? (
            <ActivityIndicator size="large" color="#fff" style={{ marginTop: 50 }} />
          ) : list.length === 0 ? (
            <View style={styles.emptyBox}>
              <Text style={styles.emptyText}>暂无房间</Text>
            </View>
          ) : (
            <View style={styles.roomList}>
              {list.map((item) => (
                <TouchableOpacity key={item.id} onPress={() => handleRoomPress(item)} activeOpacity={0.8}>
                  <ImageBackground source={{ uri: Images.welfare.roomItemBg }} style={styles.roomItem} resizeMode="stretch">
                    {/* 官方标签 */}
                    {item.officialFlag === 1 && (
                      <View style={styles.officialBadge}>
                        <Image source={{ uri: Images.welfare.official }} style={styles.officialImg} contentFit="contain" />
                      </View>
                    )}
                    {/* 成就房标签 */}
                    {item.type === 'ACHIEVEMENT' && (
                      <View style={styles.mustBeBadge}>
                        <Image source={{ uri: Images.welfare.mustBe }} style={styles.mustBeImg} contentFit="contain" />
                      </View>
                    )}
                    {/* 商品图片 */}
                    <ImageBackground source={{ uri: Images.welfare.roomItemImgBg }} style={styles.roomCover} resizeMode="contain">
                      {item.luckRoomGoodsList?.[0]?.spu?.cover && (
                        <Image source={{ uri: item.luckRoomGoodsList[0].spu.cover }} style={styles.roomCoverImg} contentFit="cover" />
                      )}
                    </ImageBackground>
                    {/* 房间信息 */}
                    <View style={styles.roomInfo}>
                      <View style={styles.roomTop}>
                        <Text style={styles.roomName} numberOfLines={1}>{item.name}</Text>
                        <Text style={styles.roomTypeLabel}>{isItemType(item.type)}</Text>
                      </View>
                      <View style={styles.roomBottom}>
                        <View style={styles.userInfo}>
                          {item.user?.avatar && (
                            <Image source={{ uri: item.user.avatar }} style={styles.userAvatar} contentFit="cover" />
                          )}
                          <Text style={styles.userName} numberOfLines={1}>{item.user?.username || '匿名'}</Text>
                        </View>
                        <Text style={styles.goodsNum}>共{item.goodsQuantity}件赠品</Text>
                        <View style={styles.participantBox}>
                          <Image source={{ uri: Images.welfare.participationIcon }} style={styles.participantIcon} contentFit="contain" />
                          <Text style={styles.participantNum}>{item.participatingList?.length || 0}</Text>
                        </View>
                      </View>
                    </View>
                  </ImageBackground>
                </TouchableOpacity>
              ))}
            </View>
          )}

          <View style={{ height: 100 }} />
        </ScrollView>
        <RuleModal ref={ruleRef} />
      </ImageBackground>
    </View>
  );
}

const { width: SCREEN_WIDTH } = Dimensions.get('window');

const styles = StyleSheet.create({
  container: { flex: 1, backgroundColor: '#1a1a2e' },
  background: { flex: 1 },
  header: {
    flexDirection: 'row',
    alignItems: 'center',
    justifyContent: 'space-between',
    paddingHorizontal: 15,
    paddingBottom: 10,
    position: 'absolute',
    top: 0,
    left: 0,
    right: 0,
    zIndex: 100,
    height: 90,
  },
  backBtn: { width: 40, height: 40, justifyContent: 'center', alignItems: 'center' },
  backText: { color: '#fff', fontSize: 20 },
  title: { color: '#fff', fontSize: 16, fontWeight: 'bold' },
  placeholder: { width: 40 },
  headBg: { position: 'absolute', top: 0, left: 0, right: 0, height: 215 },
  scrollView: { flex: 1 },

  // 顶部搜索和功能区
  topSection: { flexDirection: 'row', alignItems: 'center', paddingHorizontal: 15, marginTop: 10, marginBottom: 15 },
  searchBox: { flex: 1, height: 37, flexDirection: 'row', alignItems: 'center', paddingHorizontal: 15 },
  searchIcon: { width: 19, height: 19, marginRight: 8 },
  searchInput: { flex: 1, fontSize: 12, color: '#000', padding: 0 },
  funcBtns: { flexDirection: 'row', marginLeft: 10 },
  funcItem: { alignItems: 'center', marginLeft: 12 },
  funcIcon: { width: 16, height: 16 },
  funcText: { fontSize: 10, color: '#DFDFDF', marginTop: 2 },

  // 类型切换
  typeContainer: { paddingHorizontal: 15, marginBottom: 40 },
  typeSection: {},
  typeItem: { marginRight: 15, width: 55, height: 38, justifyContent: 'center', alignItems: 'center', position: 'relative' },
  typeText: { fontSize: 12, color: '#DFDFDF' },
  typeTextActive: {
    color: '#e79018',
    fontWeight: 'bold',
    fontSize: 15,
    textShadowColor: '#000',
    textShadowOffset: { width: 1, height: 1 },
    textShadowRadius: 1
  },
  typeSelectIconT: {
    position: 'absolute',
    right: -5,
    top: 5,
    zIndex: 2,
    width: 28,
    height: 10,
  },
  typeSelectIconB: {
      position: 'absolute',
      left: 0,
      bottom: 0,
      zIndex: 2,
      width: 24,
      height: 14,
  },

  // 房间列表
  roomList: { paddingHorizontal: 0, alignItems: 'center' },
  roomItem: { width: SCREEN_WIDTH - 12, height: 84, flexDirection: 'row', alignItems: 'center', paddingHorizontal: 16, marginBottom: 6, position: 'relative' },
  officialBadge: { position: 'absolute', right: 0, top: 0, width: 48, height: 22 },
  officialImg: { width: '100%', height: '100%' },
  mustBeBadge: { position: 'absolute', left: 0, top: 0, width: 51, height: 51 },
  mustBeImg: { width: '100%', height: '100%' },
  roomCover: { width: 58, height: 58, justifyContent: 'center', alignItems: 'center', marginRight: 14 },
  roomCoverImg: { width: 44, height: 44 },
  roomInfo: { flex: 1 },
  roomTop: { flexDirection: 'row', alignItems: 'center', marginBottom: 10 },
  roomName: {
    flex: 1,
    color: '#fff',
    fontSize: 14,
    fontWeight: '400',
    marginRight: 10,
    textShadowColor: '#000',
    textShadowOffset: { width: 1, height: 1 },
    textShadowRadius: 1
  },
  roomTypeLabel: { color: '#2E0000', fontSize: 12 },
  roomBottom: { flexDirection: 'row', alignItems: 'center' },
  userInfo: { flexDirection: 'row', alignItems: 'center', width: '45%' },
  userAvatar: { width: 24, height: 24, borderRadius: 2, backgroundColor: '#FFDD00', borderWidth: 1.5, borderColor: '#000', marginRight: 5 },
  userName: { color: '#2E0000', fontSize: 12, fontWeight: 'bold', maxWidth: 60 },
  goodsNum: { color: '#2E0000', fontSize: 10, width: '35%' },
  participantBox: { flexDirection: 'row', alignItems: 'center', width: '20%' },
  participantIcon: { width: 14, height: 14 },
  participantNum: { color: '#2E0000', fontSize: 12, marginLeft: 3 },

  emptyBox: { alignItems: 'center', paddingTop: 50 },
  emptyText: { color: '#999', fontSize: 14 },
});