import React from 'react';

interface SkeletonLoaderProps {
  variant?: 'card' | 'list' | 'text' | 'avatar' | 'button' | 'model' | 'material' | 'template' | 'table-row';
  count?: number;
  className?: string;
  width?: string;
  height?: string;
}

/**
 * 骨架屏加载组件
 * 提供多种预设样式和自定义选项
 */
export const SkeletonLoader: React.FC<SkeletonLoaderProps> = ({
  variant = 'text',
  count = 1,
  className = '',
  width,
  height
}) => {
  const baseClasses = 'animate-pulse bg-gradient-to-r from-gray-200 via-gray-300 to-gray-200 bg-[length:200%_100%] animate-loading-shimmer rounded-lg';

  const getVariantClasses = () => {
    switch (variant) {
      case 'card':
        return 'h-48 w-full';
      case 'list':
        return 'h-16 w-full';
      case 'avatar':
        return 'h-12 w-12 rounded-full';
      case 'button':
        return 'h-10 w-24';
      case 'model':
        return 'h-40 w-full';
      case 'material':
        return 'h-44 w-full';
      case 'template':
        return 'h-52 w-full';
      case 'table-row':
        return 'h-12 w-full';
      default:
        return 'h-4 w-full';
    }
  };

  const renderSkeleton = (index: number) => {
    const variantClasses = getVariantClasses();
    const customStyle = {
      width: width || undefined,
      height: height || undefined,
    };

    if (variant === 'card') {
      return (
        <div key={index} className={`${baseClasses} ${className} p-6 space-y-4`} style={customStyle}>
          {/* 卡片头部 */}
          <div className="flex items-center space-x-4">
            <div className="h-12 w-12 bg-gray-300 rounded-xl"></div>
            <div className="space-y-2 flex-1">
              <div className="h-4 bg-gray-300 rounded w-3/4"></div>
              <div className="h-3 bg-gray-300 rounded w-1/2"></div>
            </div>
          </div>
          
          {/* 卡片内容 */}
          <div className="space-y-3">
            <div className="h-3 bg-gray-300 rounded"></div>
            <div className="h-3 bg-gray-300 rounded w-5/6"></div>
          </div>
          
          {/* 统计区域 */}
          <div className="bg-gray-200 rounded-xl p-4 space-y-3">
            <div className="h-3 bg-gray-300 rounded w-1/3"></div>
            <div className="grid grid-cols-2 gap-3">
              <div className="h-8 bg-gray-300 rounded"></div>
              <div className="h-8 bg-gray-300 rounded"></div>
            </div>
          </div>
          
          {/* 底部按钮 */}
          <div className="flex gap-2 pt-4">
            <div className="h-8 w-8 bg-gray-300 rounded-lg"></div>
            <div className="h-8 bg-gray-300 rounded flex-1"></div>
            <div className="h-8 bg-gray-300 rounded flex-1"></div>
          </div>
        </div>
      );
    }

    if (variant === 'list') {
      return (
        <div key={index} className={`${baseClasses} ${className} flex items-center space-x-4 p-4`} style={customStyle}>
          <div className="h-10 w-10 bg-gray-300 rounded-lg"></div>
          <div className="space-y-2 flex-1">
            <div className="h-4 bg-gray-300 rounded w-3/4"></div>
            <div className="h-3 bg-gray-300 rounded w-1/2"></div>
          </div>
          <div className="h-8 w-20 bg-gray-300 rounded"></div>
        </div>
      );
    }

    if (variant === 'model') {
      return (
        <div key={index} className={`${baseClasses} ${className} p-4 space-y-4`} style={customStyle}>
          {/* 模特头像和基本信息 */}
          <div className="flex items-center space-x-3">
            <div className="h-12 w-12 bg-gray-300 rounded-full"></div>
            <div className="space-y-2 flex-1">
              <div className="h-4 bg-gray-300 rounded w-2/3"></div>
              <div className="h-3 bg-gray-300 rounded w-1/2"></div>
            </div>
          </div>

          {/* 描述 */}
          <div className="space-y-2">
            <div className="h-3 bg-gray-300 rounded"></div>
            <div className="h-3 bg-gray-300 rounded w-4/5"></div>
          </div>

          {/* 标签 */}
          <div className="flex gap-2">
            <div className="h-6 w-16 bg-gray-300 rounded-full"></div>
            <div className="h-6 w-20 bg-gray-300 rounded-full"></div>
          </div>

          {/* 操作按钮 */}
          <div className="flex gap-2 pt-2">
            <div className="h-8 bg-gray-300 rounded flex-1"></div>
            <div className="h-8 w-8 bg-gray-300 rounded"></div>
          </div>
        </div>
      );
    }

    if (variant === 'material') {
      return (
        <div key={index} className={`${baseClasses} ${className} p-4 space-y-4`} style={customStyle}>
          {/* 缩略图 */}
          <div className="h-24 bg-gray-300 rounded-lg"></div>

          {/* 标题和信息 */}
          <div className="space-y-2">
            <div className="h-4 bg-gray-300 rounded w-4/5"></div>
            <div className="flex items-center gap-2">
              <div className="h-5 w-12 bg-gray-300 rounded"></div>
              <div className="h-5 w-16 bg-gray-300 rounded"></div>
            </div>
          </div>

          {/* 进度条 */}
          <div className="space-y-1">
            <div className="h-3 bg-gray-300 rounded w-1/3"></div>
            <div className="h-2 bg-gray-300 rounded"></div>
          </div>

          {/* 操作按钮 */}
          <div className="flex gap-2">
            <div className="h-8 bg-gray-300 rounded flex-1"></div>
            <div className="h-8 w-8 bg-gray-300 rounded"></div>
          </div>
        </div>
      );
    }

    if (variant === 'template') {
      return (
        <div key={index} className={`${baseClasses} ${className} p-4 space-y-4`} style={customStyle}>
          {/* 预览图 */}
          <div className="h-20 bg-gray-300 rounded-lg"></div>

          {/* 标题和描述 */}
          <div className="space-y-2">
            <div className="h-5 bg-gray-300 rounded w-3/4"></div>
            <div className="h-3 bg-gray-300 rounded"></div>
            <div className="h-3 bg-gray-300 rounded w-3/5"></div>
          </div>

          {/* 统计信息 */}
          <div className="flex justify-between">
            <div className="space-y-1">
              <div className="h-3 bg-gray-300 rounded w-10"></div>
              <div className="h-4 bg-gray-300 rounded w-8"></div>
            </div>
            <div className="space-y-1">
              <div className="h-3 bg-gray-300 rounded w-10"></div>
              <div className="h-4 bg-gray-300 rounded w-8"></div>
            </div>
          </div>

          {/* 操作按钮 */}
          <div className="flex gap-2">
            <div className="h-9 bg-gray-300 rounded flex-1"></div>
            <div className="h-9 w-20 bg-gray-300 rounded"></div>
          </div>
        </div>
      );
    }

    if (variant === 'table-row') {
      return (
        <div key={index} className={`${baseClasses} ${className} flex items-center space-x-6 p-3`} style={customStyle}>
          <div className="h-4 bg-gray-300 rounded w-1/4"></div>
          <div className="h-4 bg-gray-300 rounded w-1/6"></div>
          <div className="h-4 bg-gray-300 rounded w-1/8"></div>
          <div className="h-4 bg-gray-300 rounded w-1/5"></div>
          <div className="h-6 w-16 bg-gray-300 rounded"></div>
        </div>
      );
    }

    return (
      <div
        key={index}
        className={`${baseClasses} ${variantClasses} ${className}`}
        style={customStyle}
      />
    );
  };

  return (
    <div className="space-y-4 animate-fade-in">
      {Array.from({ length: count }, (_, index) => renderSkeleton(index))}
    </div>
  );
};

/**
 * 项目卡片骨架屏
 */
export const ProjectCardSkeleton: React.FC<{ count?: number }> = ({ count = 4 }) => {
  return (
    <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-6">
      {Array.from({ length: count }, (_, index) => (
        <SkeletonLoader key={index} variant="card" />
      ))}
    </div>
  );
};

/**
 * 列表项骨架屏
 */
export const ListItemSkeleton: React.FC<{ count?: number }> = ({ count = 5 }) => {
  return (
    <div className="space-y-3">
      {Array.from({ length: count }, (_, index) => (
        <SkeletonLoader key={index} variant="list" />
      ))}
    </div>
  );
};

/**
 * 模特卡片骨架屏
 */
export const ModelCardSkeleton: React.FC<{ count?: number }> = ({ count = 8 }) => {
  return (
    <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 2xl:grid-cols-5 gap-4">
      {Array.from({ length: count }, (_, index) => (
        <SkeletonLoader key={index} variant="model" />
      ))}
    </div>
  );
};

/**
 * 素材卡片骨架屏
 */
export const MaterialCardSkeleton: React.FC<{ count?: number }> = ({ count = 6 }) => {
  return (
    <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-6">
      {Array.from({ length: count }, (_, index) => (
        <SkeletonLoader key={index} variant="material" />
      ))}
    </div>
  );
};

/**
 * 模板卡片骨架屏
 */
export const TemplateCardSkeleton: React.FC<{ count?: number }> = ({ count = 8 }) => {
  return (
    <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-6">
      {Array.from({ length: count }, (_, index) => (
        <SkeletonLoader key={index} variant="template" />
      ))}
    </div>
  );
};

/**
 * 表格骨架屏
 */
export const TableSkeleton: React.FC<{ rows?: number; columns?: number }> = ({
  rows = 5,
  columns = 4
}) => {
  return (
    <div className="bg-white rounded-lg border border-gray-200 overflow-hidden">
      {/* 表头 */}
      <div className="bg-gray-50 border-b border-gray-200 p-4">
        <div className="flex space-x-6">
          {Array.from({ length: columns }, (_, index) => (
            <div key={index} className="h-4 bg-gray-300 rounded flex-1 animate-pulse"></div>
          ))}
        </div>
      </div>

      {/* 表格行 */}
      <div className="divide-y divide-gray-200">
        {Array.from({ length: rows }, (_, index) => (
          <SkeletonLoader key={index} variant="table-row" />
        ))}
      </div>
    </div>
  );
};

/**
 * 页面加载骨架屏
 */
export const PageLoadingSkeleton: React.FC<{
  showHeader?: boolean;
  showStats?: boolean;
  cardCount?: number;
}> = ({
  showHeader = true,
  showStats = true,
  cardCount = 6
}) => {
  return (
    <div className="space-y-6 animate-fade-in">
      {/* 页面头部 */}
      {showHeader && (
        <div className="bg-white rounded-xl border border-gray-200 p-6 space-y-4">
          <div className="flex items-center justify-between">
            <div className="space-y-2">
              <div className="h-6 bg-gray-300 rounded w-48 animate-pulse"></div>
              <div className="h-4 bg-gray-300 rounded w-32 animate-pulse"></div>
            </div>
            <div className="h-10 w-24 bg-gray-300 rounded animate-pulse"></div>
          </div>
        </div>
      )}

      {/* 统计卡片 */}
      {showStats && (
        <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-4">
          {Array.from({ length: 4 }, (_, index) => (
            <div key={index} className="bg-white rounded-lg border border-gray-200 p-4 space-y-2">
              <div className="h-4 bg-gray-300 rounded w-20 animate-pulse"></div>
              <div className="h-8 bg-gray-300 rounded w-16 animate-pulse"></div>
            </div>
          ))}
        </div>
      )}

      {/* 主要内容 */}
      <ProjectCardSkeleton count={cardCount} />
    </div>
  );
};