/**
 * 游戏分类菜单组件
 *
 * 展示游戏分类，支持切换，使用真实数据
 */

import React, { useRef, useEffect, useState, useCallback, useMemo } from 'react';
import { View, Text, ScrollView, TouchableOpacity, Animated, Image, Platform } from 'react-native';
// import type { GameCategory } from '@/types/home';
import { styles } from './styles';
import { useGameMainMenus, useMenuDataLoaded, useSelectedCategory } from '@/hooks/useGameMenus';
// import useGameStore from '@/stores/gameStore';
// import { ThemeEnum } from '@/constants/theme';
import { Colors, useColorScheme } from '@/theme';

// 条件导入 LinearGradient - 仅在非 Web 平台使用
let LinearGradient: any = null;
if (Platform.OS !== 'web') {
  LinearGradient = require('react-native-linear-gradient').default;
}

// 游戏菜单图片映射 - 使用 require 加载本地资源
const MENU_ICON_MAP: Record<string, any> = {
  'recommend': require('../../../../assets/images/game/menu/recommend.png'),
  'chess': require('../../../../assets/images/game/menu/chess.png'),
  'electronic': require('../../../../assets/images/game/menu/electronic.png'),
  'fishing': require('../../../../assets/images/game/menu/fishing.png'),
  'lottery': require('../../../../assets/images/game/menu/lottery.png'),
  'sports': require('../../../../assets/images/game/menu/sports.png'),
  'trial': require('../../../../assets/images/game/menu/trial.png'),
  'blockThird': require('../../../../assets/images/game/menu/blockThird.png'),
  'clock-solid': require('../../../../assets/images/game/menu/clock-solid.png'),
  'clock-solid_dark': require('../../../../assets/images/game/menu/clock-solid_dark.png'),
  'home-star-solid': require('../../../../assets/images/game/menu/home-star-solid.png'),
  'live': require('../../../../assets/images/game/menu/live.png'),
};

interface GameMainMenuProps {
  topHeight?: number;
  showSubMenus?: boolean;
}

/**
 * 游戏分类菜单组件
 */
export default function GameMainMenu({
  topHeight = 0,
  showSubMenus = true,
}: GameMainMenuProps) {
  const theme = useColorScheme();
  const s = styles[theme];
  const scrollViewRef = useRef<ScrollView>(null);
  const gameMenus = useGameMainMenus(theme);

  // 从 hook 获取选中分类和更新方法
  const { selectedCategory, setSelectedCategory } = useSelectedCategory();

  // 检查数据加载完成
  const isDataLoaded = useMenuDataLoaded();

  // 使用 useMemo 缓存找到的索引，避免每次都重新计算
  const selectedIndex = useMemo(() => {
    return gameMenus.findIndex((cat) => cat.key === selectedCategory);
  }, [selectedCategory, gameMenus]);

  // 当分类改变时，滚动到该分类
  useEffect(() => {
    if (selectedIndex >= 0) {
      scrollViewRef.current?.scrollTo({
        x: selectedIndex * 100,
        animated: true,
      });
    }
  }, [selectedIndex]);

  // 使用 useCallback 稳定 onPress 回调
  const handleCategoryPress = useCallback(
    (categoryKey: string) => {
      setSelectedCategory(categoryKey);
    },
    [setSelectedCategory]
  );

  // 骨架屏 - 显示加载中的占位符
  const renderSkeleton = () => (
    <View style={s.container}>
      <ScrollView
        style={s.scrollView}
        horizontal
        showsHorizontalScrollIndicator={false}
        scrollEventThrottle={16}
      >
        {Array.from({ length: 6 }).map((_, index) => (
          <View
            key={`skeleton-${index}`}
            style={[s.menuItem, { backgroundColor: theme === 'dark' ? '#333' : '#e0e0e0' }]}
          />
        ))}
      </ScrollView>
    </View>
  );
  console.log('isDataLoaded', isDataLoaded);
  // 如果动态数据还未加载，显示骨架屏
  if (!isDataLoaded) {
    return renderSkeleton();
  }

  return (
    <View style={s.container}>
      <ScrollView
        ref={scrollViewRef}
        style={s.scrollView}
        horizontal
        showsHorizontalScrollIndicator={false}
        scrollEventThrottle={16}
      >
        {gameMenus.map((menu) => {
          // 处理图片源 - 优先使用 logo（URL），其次使用 icon（本地资源）
          let imageSource: any = null;

          if (menu.logo) {
            // logo 是 URL，直接使用
            imageSource = { uri: menu.logo };
          } else if (menu.icon) {
            // icon 是本地资源名称，从映射表中获取
            imageSource = MENU_ICON_MAP[menu.icon];
          }

          const isActive = selectedCategory === menu.key;
          const themeColors = Colors[theme];

          // 获取渐变色 - 从主题色到透明
          const gradientStart = `${themeColors.tint}40`; // 主题色 + 40% 透明度
          const gradientEnd = `${themeColors.tint}00`;   // 完全透明

          const menuContent = (
            <>
              {imageSource && (
                <Image source={imageSource} style={s.menuIcon} resizeMode="contain" />
              )}
              <Text style={[s.menuText, isActive && s.menuTextActive]}>
                {menu.name}
              </Text>
            </>
          );

          // 如果是选中状态，使用 LinearGradient 包装（非 Web 平台）或 CSS 渐变（Web 平台）
          if (isActive) {
            // Web 平台使用 CSS 渐变
            if (Platform.OS === 'web') {
              const webStyle = {
                ...s.menuItem,
                ...s.menuItemActive,
                background: `linear-gradient(to top, ${gradientStart}, ${gradientEnd})`,
                backgroundColor: undefined, // 移除 backgroundColor，使用 background
              } as any;

              return (
                <TouchableOpacity
                  key={menu.key}
                  style={webStyle}
                  onPress={() => handleCategoryPress(menu.key)}
                  activeOpacity={0.7}
                >
                  {menuContent}
                </TouchableOpacity>
              );
            }

            // 非 Web 平台使用 LinearGradient
            if (LinearGradient) {
              return (
                <LinearGradient
                  key={menu.key}
                  colors={[gradientStart, gradientEnd]}
                  start={{ x: 0.5, y: 1 }} // 从下往上
                  end={{ x: 0.5, y: 0 }}
                  style={[s.menuItem, s.menuItemActive]}
                >
                  <TouchableOpacity
                    style={{ flex: 1, justifyContent: 'center', alignItems: 'center' }}
                    onPress={() => handleCategoryPress(menu.key)}
                    activeOpacity={0.7}
                  >
                    {menuContent}
                  </TouchableOpacity>
                </LinearGradient>
              );
            }

            // 备用方案：如果 LinearGradient 不可用，使用纯色
            return (
              <TouchableOpacity
                key={menu.key}
                style={[s.menuItem, s.menuItemActive]}
                onPress={() => handleCategoryPress(menu.key)}
                activeOpacity={0.7}
              >
                {menuContent}
              </TouchableOpacity>
            );
          }

          // 未选中状态，使用普通 TouchableOpacity
          return (
            <TouchableOpacity
              key={menu.key}
              style={s.menuItem}
              onPress={() => handleCategoryPress(menu.key)}
              activeOpacity={0.7}
            >
              {menuContent}
            </TouchableOpacity>
          );
        })}
      </ScrollView>
    </View>
  );
}