import { Platform, Dimensions } from 'react-native';
import { DeviceType } from '@/hooks/useResponsiveLayout';

export const DeviceUtils = {
  /**
   * 检测当前设备类型
   */
  getDeviceType(): DeviceType {
    const isTV = process.env.EXPO_TV === '1' || Platform.isTV;
    if (isTV) return 'tv';
    
    const { width } = Dimensions.get('window');
    if (width >= 1024) return 'tv';
    if (width >= 768) return 'tablet';
    return 'mobile';
  },

  /**
   * 检测是否为TV环境
   */
  isTV(): boolean {
    return this.getDeviceType() === 'tv';
  },

  /**
   * 检测是否为移动设备
   */
  isMobile(): boolean {
    return this.getDeviceType() === 'mobile';
  },

  /**
   * 检测是否为平板设备
   */
  isTablet(): boolean {
    return this.getDeviceType() === 'tablet';
  },

  /**
   * 检测是否支持触摸交互
   */
  supportsTouchInteraction(): boolean {
    return !this.isTV();
  },

  /**
   * 检测是否支持遥控器交互
   */
  supportsRemoteControlInteraction(): boolean {
    return this.isTV();
  },

  /**
   * 获取最小触摸目标尺寸
   */
  getMinTouchTargetSize(): number {
    const deviceType = this.getDeviceType();
    switch (deviceType) {
      case 'mobile':
        return 44; // iOS HIG minimum
      case 'tablet':
        return 48; // Material Design minimum
      case 'tv':
        return 60; // TV optimized
      default:
        return 44;
    }
  },

  /**
   * 获取适合的文字大小
   */
  getOptimalFontSize(baseSize: number): number {
    const deviceType = this.getDeviceType();
    const scaleFactor = {
      mobile: 1.0,
      tablet: 1.1,
      tv: 1.25,
    }[deviceType];
    
    return Math.round(baseSize * scaleFactor);
  },

  /**
   * 获取适合的间距
   */
  getOptimalSpacing(baseSpacing: number): number {
    const deviceType = this.getDeviceType();
    const scaleFactor = {
      mobile: 0.8,
      tablet: 1.0,
      tv: 1.5,
    }[deviceType];
    
    return Math.round(baseSpacing * scaleFactor);
  },

  /**
   * 检测设备是否处于横屏模式
   */
  isLandscape(): boolean {
    const { width, height } = Dimensions.get('window');
    return width > height;
  },

  /**
   * 检测设备是否处于竖屏模式
   */
  isPortrait(): boolean {
    return !this.isLandscape();
  },

  /**
   * 获取安全的网格列数
   */
  getSafeColumnCount(preferredColumns: number): number {
    const { width } = Dimensions.get('window');
    const minCardWidth = this.isMobile() ? 120 : this.isTablet() ? 140 : 160;
    const maxColumns = Math.floor(width / minCardWidth);
    
    return Math.min(preferredColumns, maxColumns);
  },

  /**
   * 获取设备特定的动画持续时间
   */
  getAnimationDuration(baseDuration: number): number {
    const deviceType = this.getDeviceType();
    // TV端动画稍慢，更符合10英尺体验
    const scaleFactor = {
      mobile: 1.0,
      tablet: 1.0,
      tv: 1.2,
    }[deviceType];
    
    return Math.round(baseDuration * scaleFactor);
  },
};