"use client";

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

type VideoGenerationPhase = "idle" | "queued" | "processing" | "finalizing" | "failed";

type VideoGenerationLoadingProps = {
  providerType?: string;
  modelName?: string;
  phase?: VideoGenerationPhase;
  elapsedSeconds?: number;
};

const PROVIDER_MODEL_LABEL: Record<string, string> = {
  "qianwen-video": "千问视频",
  "fal-video": "FAL 视频",
  "ruxa-video": "RUXA 视频",
  "volcano-video": "火山视频",
  runway: "Runway 视频",
  krea: "Krea 视频",
};

const PHASE_HINT: Record<VideoGenerationPhase, string> = {
  idle: "任务已创建，正在初始化视频参数。",
  queued: "任务已进入队列，请稍候。",
  processing: "模型正在生成视频，请耐心等待。",
  finalizing: "视频已生成完成，正在同步到对话。",
  failed: "视频生成失败，正在尝试故障迁移。",
};

const PROVIDER_GRADIENT_CLASS: Record<string, string> = {
  "qianwen-video": "from-blue-400 via-purple-400 to-pink-400",
  "fal-video": "from-sky-400 via-cyan-400 to-indigo-400",
  "ruxa-video": "from-violet-400 via-fuchsia-400 to-pink-400",
  "volcano-video": "from-orange-400 via-amber-400 to-yellow-400",
  runway: "from-rose-400 via-orange-400 to-amber-400",
  krea: "from-blue-400 via-cyan-400 to-emerald-400",
};

/**
 * 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(
  ({
    providerType,
    modelName,
    phase = "processing",
    elapsedSeconds = 0,
  }: VideoGenerationLoadingProps) => {
    const normalizedProviderType =
      providerType === "doubao-video" ? "volcano-video" : providerType || "qianwen-video";
    const resolvedModelName =
      modelName?.trim() ||
      PROVIDER_MODEL_LABEL[normalizedProviderType] ||
      "AI 视频模型";
    const elapsedLabel = elapsedSeconds > 0 ? `已等待 ${elapsedSeconds}s` : "预计 60～180 秒";
    const phaseHint = PHASE_HINT[phase];
    const isFailed = phase === "failed";
    const palette = isFailed
      ? {
          ping: "bg-red-500/20",
          pulse: "bg-red-500/10",
          ring: "ring-red-500/30",
          spinner: "text-red-500",
          dot: "bg-red-500",
        }
      : {
          ping: "bg-blue-500/20",
          pulse: "bg-blue-500/10",
          ring: "ring-blue-500/30",
          spinner: "text-blue-500",
          dot: "bg-blue-500",
        };
    const gradientClass =
      PROVIDER_GRADIENT_CLASS[normalizedProviderType] || PROVIDER_GRADIENT_CLASS["qianwen-video"];

    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 ${palette.ping} animate-ping`} />
            <div className={`absolute inset-0 rounded-full ${palette.pulse} animate-pulse`} />
            <div className={`relative flex size-8 items-center justify-center rounded-full bg-background ring-2 ${palette.ring}`}>
              <div className={`animate-spin ${palette.spinner}`}>
                <SparklesIcon size={14} />
              </div>
            </div>
          </div>

          <div className="flex flex-col gap-3">
            <div className="flex items-center gap-2 text-[13px] text-[#a8b1bf]">
              <CircleDot className="h-3.5 w-3.5 fill-current" />
              <span className="text-[14px]">{resolvedModelName}</span>
            </div>

            {/* 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 ${palette.dot} animate-bounce`}
                  style={{ animationDelay: "0ms" }}
                />
                <span
                  className={`h-2 w-2 rounded-full ${palette.dot} animate-bounce`}
                  style={{ animationDelay: "150ms" }}
                />
                <span
                  className={`h-2 w-2 rounded-full ${palette.dot} 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 ${gradientClass} 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 */}
            <div className="space-y-1 text-xs text-muted-foreground">
              <p>{phaseHint}</p>
              <p>{elapsedLabel}</p>
            </div>
          </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";