"use client";

import { useEffect, useState } from "react";
import { cn } from "@/lib/utils";

type HomeAnimationEmbedProps = {
  htmlContent: string;
  title?: string;
  description?: string;
  className?: string;
  frameClassName?: string;
};

export function HomeAnimationEmbed({
  htmlContent,
  title,
  description,
  className,
  frameClassName,
}: HomeAnimationEmbedProps) {
  const [interactive, setInteractive] = useState(false);
  const [frameUrl, setFrameUrl] = useState("");

  useEffect(() => {
    if (!htmlContent.trim()) {
      setFrameUrl("");
      return;
    }

    const blob = new Blob([htmlContent], { type: "text/html;charset=utf-8" });
    const nextFrameUrl = URL.createObjectURL(blob);
    setFrameUrl(nextFrameUrl);

    return () => URL.revokeObjectURL(nextFrameUrl);
  }, [htmlContent]);

  useEffect(() => {
    if (!interactive) {
      return;
    }

    const handleKeyDown = (event: KeyboardEvent) => {
      if (event.key === "Escape") {
        setInteractive(false);
      }
    };

    window.addEventListener("keydown", handleKeyDown);
    return () => window.removeEventListener("keydown", handleKeyDown);
  }, [interactive]);

  if (!htmlContent.trim()) {
    return null;
  }

  return (
    <div
      className={cn(
        "overflow-hidden rounded-[24px] border border-black/10 bg-white shadow-[0_10px_24px_rgba(0,0,0,0.05)]",
        className,
      )}
      onMouseLeave={() => setInteractive(false)}
    >
      {title || description ? (
        <div className="flex items-start justify-between gap-4 border-b border-black/8 px-4 py-3">
          <div className="min-w-0">
            {title ? (
              <div className="text-[14px] font-semibold text-black">{title}</div>
            ) : null}
            {description ? (
              <div className="mt-1 text-[12px] text-black/45">{description}</div>
            ) : null}
          </div>
          <button
            type="button"
            className={cn(
              "inline-flex h-8 items-center rounded-full px-3 text-[12px] font-medium transition-colors",
              interactive
                ? "bg-black text-white hover:bg-black/85"
                : "border border-black/10 bg-white text-black/65 hover:bg-black/5",
            )}
            onClick={() => setInteractive((value) => !value)}
          >
            {interactive ? "退出互动" : "进入互动"}
          </button>
        </div>
      ) : null}

      <div
        className={cn(
          "relative h-[360px] w-full bg-[#f6f6f6] md:h-[420px]",
          frameClassName,
        )}
      >
        {frameUrl ? (
          <iframe
            title={title || "首页互动动画"}
            src={frameUrl}
            sandbox="allow-scripts allow-forms allow-pointer-lock"
            loading="lazy"
            className={cn(
              "h-full w-full border-0 transition-opacity",
              interactive ? "pointer-events-auto opacity-100" : "pointer-events-none opacity-95",
            )}
          />
        ) : null}

        {!interactive ? (
          <button
            type="button"
            className="absolute inset-0 flex flex-col items-center justify-center gap-3 bg-white/12 backdrop-blur-[1px]"
            onClick={() => setInteractive(true)}
          >
            <span className="rounded-full bg-white/92 px-4 py-2 text-[13px] font-medium text-black shadow-sm">
              点击进入互动
            </span>
            <span className="text-[12px] text-black/55">
              默认保留页面滚动，进入互动后可拖拽和滚轮操作，按 `Esc` 或移出模块退出
            </span>
          </button>
        ) : (
          <div className="pointer-events-none absolute bottom-3 right-3 rounded-full bg-black/70 px-3 py-1 text-[11px] text-white">
            互动中
          </div>
        )}
      </div>
    </div>
  );
}