"use client";

import { memo } from "react";
import { SparklesIcon } from "./icons";
import { Scissors, Expand, Droplet } from "lucide-react";

interface ImageProcessingLoadingProps {
  type: "enhance" | "rmbg" | "extend" | "watermark"; // 处理类型：变清晰、抠图、图像拓展或去水印
}

/**
 * 图片处理加载占位符组件
 * 显示类似 Gemini 生图的动态卡片效果
 */
export const ImageProcessingLoading = memo(({ type }: ImageProcessingLoadingProps) => {
  const isEnhance = type === "enhance";
  const isRmbg = type === "rmbg";
  const isExtend = type === "extend";
  const isWatermark = type === "watermark";
  
  let text: string;
  let icon: any;
  let colorClasses: any;
  
  if (isEnhance) {
    text = "正在变清晰";
    icon = SparklesIcon;
    colorClasses = {
      ping: "bg-blue-500/20",
      pulse: "bg-blue-500/10",
      ring: "ring-blue-500/30",
      text: "text-blue-500",
      dot: "bg-blue-500",
      gradientFrom: "from-blue-400",
      gradientFromOverlay: "from-blue-500/40",
      gradientToOverlay: "to-blue-500/30",
    };
  } else if (isRmbg) {
    text = "正在抠图";
    icon = Scissors;
    colorClasses = {
      ping: "bg-green-500/20",
      pulse: "bg-green-500/10",
      ring: "ring-green-500/30",
      text: "text-green-500",
      dot: "bg-green-500",
      gradientFrom: "from-green-400",
      gradientFromOverlay: "from-green-500/40",
      gradientToOverlay: "to-green-500/30",
    };
  } else if (isWatermark) {
    text = "正在去水印";
    icon = Droplet;
    colorClasses = {
      ping: "bg-cyan-500/20",
      pulse: "bg-cyan-500/10",
      ring: "ring-cyan-500/30",
      text: "text-cyan-500",
      dot: "bg-cyan-500",
      gradientFrom: "from-cyan-400",
      gradientFromOverlay: "from-cyan-500/40",
      gradientToOverlay: "to-cyan-500/30",
    };
  } else {
    text = "正在图像拓展";
    icon = Expand;
    colorClasses = {
      ping: "bg-orange-500/20",
      pulse: "bg-orange-500/10",
      ring: "ring-orange-500/30",
      text: "text-orange-500",
      dot: "bg-orange-500",
      gradientFrom: "from-orange-400",
      gradientFromOverlay: "from-orange-500/40",
      gradientToOverlay: "to-orange-500/30",
    };
  }
  
  const Icon = icon;

  return (
    <div
      className="group/message fade-in w-full animate-in duration-300"
      data-role="assistant"
      data-testid="message-assistant-image-processing-loading"
    >
      <div className="flex items-start justify-start gap-3">
        {/* 头像 */}
        <div className="relative -mt-1 flex size-8 shrink-0 items-center justify-center">
          <div className={`absolute inset-0 rounded-full ${colorClasses.ping} animate-ping`} />
          <div className={`absolute inset-0 rounded-full ${colorClasses.pulse} animate-pulse`} />
          <div className={`relative flex size-8 items-center justify-center rounded-full bg-background ring-2 ${colorClasses.ring}`}>
            <div className={`animate-spin ${colorClasses.text}`}>
              <Icon 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">
              {text}
            </span>
            <span className="flex gap-1">
              <span
                className={`h-2 w-2 rounded-full ${colorClasses.dot} animate-bounce`}
                style={{ animationDelay: "0ms" }}
              />
              <span
                className={`h-2 w-2 rounded-full ${colorClasses.dot} animate-bounce`}
                style={{ animationDelay: "150ms" }}
              />
              <span
                className={`h-2 w-2 rounded-full ${colorClasses.dot} animate-bounce`}
                style={{ animationDelay: "300ms" }}
              />
            </span>
          </div>

          {/* 图片占位符 - 170x200px */}
          <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 ${colorClasses.gradientFrom} 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 ${colorClasses.gradientFromOverlay} 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 ${colorClasses.gradientToOverlay} 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" }} />
                {/* 图标 */}
                <Icon
                  className="h-10 w-10 text-white/80 animate-pulse"
                  style={{ animationDuration: "1.5s" }}
                />
              </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"
              style={{ 
                animation: "shimmer 2s infinite",
              }}
            />
          </div>
          
          {/* 提示文字 */}
          <span className="text-xs text-muted-foreground">
            正在处理图片，请稍候...
          </span>
        </div>
      </div>
      
      {/* 流光动画样式 */}
      <style jsx>{`
        @keyframes shimmer {
          0% {
            transform: translateX(-100%);
          }
          100% {
            transform: translateX(100%);
          }
        }
      `}</style>
    </div>
  );
});

ImageProcessingLoading.displayName = "ImageProcessingLoading";