"use client";

import { memo } from "react";
import { SparklesIcon } from "./icons";

/**
 * 千问视频生成加载占位符组件
 * 显示一个带有一闪一闪头像效果的动态卡片
 */
export const QianwenVideoLoading = memo(() => {
  return (
    <div
      className="group/message fade-in w-full animate-in duration-300"
      data-role="assistant"
      data-testid="message-assistant-video-loading"
    >
      <div className="flex items-start justify-start gap-3">
        {/* 头像 - 和图片生成一样的一闪一闪效果 */}
        <div className="relative -mt-1 flex size-8 shrink-0 items-center justify-center">
          <div className="absolute inset-0 rounded-full bg-blue-500/20 animate-ping" />
          <div className="absolute inset-0 rounded-full bg-blue-500/10 animate-pulse" />
          <div className="relative flex size-8 items-center justify-center rounded-full bg-background ring-2 ring-blue-500/30">
            <div className="animate-spin text-blue-500">
              <SparklesIcon size={14} />
            </div>
          </div>
        </div>

        <div className="flex flex-col gap-3">
          {/* 文本提示 */}
          <div className="flex items-center gap-1.5">
            <span className="text-base font-medium text-foreground">
              正在生成视频
            </span>
            <span className="flex gap-1">
              <span
                className="h-2 w-2 rounded-full bg-blue-500 animate-bounce"
                style={{ animationDelay: "0ms" }}
              />
              <span
                className="h-2 w-2 rounded-full bg-blue-500 animate-bounce"
                style={{ animationDelay: "150ms" }}
              />
              <span
                className="h-2 w-2 rounded-full bg-blue-500 animate-bounce"
                style={{ animationDelay: "300ms" }}
              />
            </span>
          </div>

          {/* 视频占位符 - 170x200 像素，带动态效果 */}
          <div
            className="relative overflow-hidden rounded-xl"
            style={{ width: "170px", height: "200px" }}
          >
            {/* 底层渐变背景 */}
            <div className="absolute inset-0 bg-gradient-to-br from-blue-400 via-purple-400 to-pink-400 opacity-60" />
            
            {/* 动态模糊叠加层 1 */}
            <div 
              className="absolute inset-0 bg-gradient-to-tr from-blue-500/40 via-transparent to-purple-500/40 animate-pulse"
              style={{ animationDuration: "2s" }}
            />
            
            {/* 动态模糊叠加层 2 */}
            <div 
              className="absolute inset-0 bg-gradient-to-bl from-purple-500/30 via-transparent to-blue-500/30 animate-pulse"
              style={{ animationDuration: "2.5s", animationDelay: "0.5s" }}
            />
            
            {/* 噪点纹理效果 */}
            <div 
              className="absolute inset-0 opacity-30"
              style={{
                backgroundImage: `url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E")`,
              }}
            />
            
            {/* 模糊叠加 */}
            <div className="absolute inset-0 backdrop-blur-sm" />
            
            {/* 中心图标 */}
            <div className="absolute inset-0 flex items-center justify-center">
              <div className="relative">
                {/* 外圈光晕 */}
                <div className="absolute -inset-4 rounded-full bg-white/20 animate-ping" style={{ animationDuration: "1.5s" }} />
                {/* 视频图标 */}
                <svg
                  className="h-10 w-10 text-white/80 animate-pulse"
                  fill="none"
                  stroke="currentColor"
                  viewBox="0 0 24 24"
                  style={{ animationDuration: "1.5s" }}
                >
                  <path
                    strokeLinecap="round"
                    strokeLinejoin="round"
                    strokeWidth={1.5}
                    d="M15 10l4.553-2.276A1 1 0 0121 8.618v6.764a1 1 0 01-1.447.894L15 14M5 18h8a2 2 0 002-2V8a2 2 0 00-2-2H5a2 2 0 00-2 2v8a2 2 0 002 2z"
                  />
                </svg>
              </div>
            </div>
            
            {/* 流光效果 */}
            <div 
              className="absolute inset-0 bg-gradient-to-r from-transparent via-white/20 to-transparent -translate-x-full animate-shimmer"
              style={{ 
                animation: "shimmer 2s infinite",
              }}
            />
          </div>
          
          {/* 提示文字 */}
          <span className="text-xs text-muted-foreground">
            ⏱️ 视频生成需要 30-60 秒，请耐心等待...
          </span>
        </div>
      </div>
      
      {/* 流光动画样式 */}
      <style jsx>{`
        @keyframes shimmer {
          0% {
            transform: translateX(-100%);
          }
          100% {
            transform: translateX(100%);
          }
        }
      `}</style>
    </div>
  );
});

QianwenVideoLoading.displayName = "QianwenVideoLoading";