/**
 * 首页 Header 组件
 * 包含搜索、用户信息、消息等功能
 */

import React, { useState, useCallback } from 'react';
import {
  View,
  Text,
  StyleSheet,
  TouchableOpacity,
  TextInput,
  Image,
  Dimensions,
} from 'react-native';
import { useColorScheme } from '@/hooks';
import { createThemeStyles } from '@/theme';
import Colors from '@/constants/Colors';

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

/**
 * 创建主题样式
 */
const styles = createThemeStyles((colors) => ({
  container: {
    backgroundColor: colors.background,
    paddingHorizontal: 12,
    paddingVertical: 8,
    borderBottomWidth: 1,
    borderBottomColor: colors.border,
  },
  header: {
    flexDirection: 'row',
    alignItems: 'center',
    justifyContent: 'space-between',
    paddingVertical: 8,
  },
  logo: {
    fontSize: 18,
    fontWeight: '600',
    color: colors.primary,
  },
  searchContainer: {
    flex: 1,
    marginHorizontal: 12,
    flexDirection: 'row',
    alignItems: 'center',
    backgroundColor: colors.card,
    borderRadius: 20,
    paddingHorizontal: 12,
    height: 36,
  },
  searchInput: {
    flex: 1,
    marginLeft: 8,
    fontSize: 14,
    color: colors.text,
  },
  searchPlaceholder: {
    color: colors.text + '80',
  },
  iconButton: {
    width: 36,
    height: 36,
    borderRadius: 18,
    justifyContent: 'center',
    alignItems: 'center',
    marginLeft: 8,
  },
  badge: {
    position: 'absolute',
    top: -4,
    right: -4,
    backgroundColor: colors.primary,
    borderRadius: 8,
    minWidth: 16,
    height: 16,
    justifyContent: 'center',
    alignItems: 'center',
  },
  badgeText: {
    color: '#fff',
    fontSize: 10,
    fontWeight: '600',
    textAlign: 'center',
  },
}));

interface HeaderProps {
  theme?: 'light' | 'dark';
  onSearch?: (keyword: string) => void;
  onMessagePress?: () => void;
  onUserPress?: () => void;
  unreadCount?: number;
}

/**
 * Header 组件
 */
export default function Header({
  theme = 'light',
  onSearch,
  onMessagePress,
  onUserPress,
  unreadCount = 0,
}: HeaderProps) {
  const colorScheme = useColorScheme();
  const actualTheme = theme === 'light' || theme === 'dark' ? theme : colorScheme;
  const s = styles[actualTheme];
  const colors = Colors[actualTheme];

  const [searchText, setSearchText] = useState('');
  const [isSearching, setIsSearching] = useState(false);

  const handleSearch = useCallback(() => {
    if (searchText.trim()) {
      onSearch?.(searchText);
    }
  }, [searchText, onSearch]);

  const handleClearSearch = useCallback(() => {
    setSearchText('');
  }, []);

  return (
    <View style={s.container}>
      {/* 顶部栏 */}
      <View style={s.header}>
        {/* Logo */}
        <Text style={s.logo}>🎮 游戏大厅</Text>

        {/* 搜索框 */}
        <View style={s.searchContainer}>
          <Text style={{ color: colors.text + '60', fontSize: 16 }}>🔍</Text>
          <TextInput
            style={[s.searchInput, s.searchPlaceholder]}
            placeholder="搜索游戏..."
            placeholderTextColor={colors.text + '60'}
            value={searchText}
            onChangeText={setSearchText}
            onSubmitEditing={handleSearch}
            returnKeyType="search"
          />
          {searchText ? (
            <TouchableOpacity onPress={handleClearSearch}>
              <Text style={{ fontSize: 16 }}>✕</Text>
            </TouchableOpacity>
          ) : null}
        </View>

        {/* 消息按钮 */}
        <TouchableOpacity
          style={s.iconButton}
          onPress={onMessagePress}
          activeOpacity={0.7}
        >
          <Text style={{ fontSize: 18 }}>💬</Text>
          {unreadCount > 0 && (
            <View style={s.badge}>
              <Text style={s.badgeText}>
                {unreadCount > 99 ? '99+' : unreadCount}
              </Text>
            </View>
          )}
        </TouchableOpacity>

        {/* 用户按钮 */}
        <TouchableOpacity
          style={s.iconButton}
          onPress={onUserPress}
          activeOpacity={0.7}
        >
          <Text style={{ fontSize: 18 }}>👤</Text>
        </TouchableOpacity>
      </View>
    </View>
  );
}