import { useEffect, useRef, useState } from "react";

type AdFormat = "auto" | "fluid" | "rectangle" | "horizontal" | "vertical" | "autorelaxed";

interface AdSenseProps {
  slot: string;
  format?: AdFormat;
  responsive?: boolean;
  className?: string;
  style?: Record<string, string>;
  layout?: string;
  layoutKey?: string;
  onAdStatus?: (filled: boolean) => void;
}

export default function AdSense({
  slot,
  format = "auto",
  responsive = true,
  className = "",
  style,
  layout,
  layoutKey,
  onAdStatus,
}: AdSenseProps) {
  const adRef = useRef<HTMLModElement>(null);
  const pushed = useRef(false);

  useEffect(() => {
    if (pushed.current) return;
    try {
      const adsbygoogle = (window as any).adsbygoogle || [];
      adsbygoogle.push({});
      pushed.current = true;
    } catch (e) {
    }

    if (onAdStatus) {
      const checkAd = () => {
        if (adRef.current) {
          const ins = adRef.current;
          const status = ins.getAttribute("data-ad-status");
          if (status === "filled") {
            onAdStatus(true);
            return;
          }
          if (status === "unfilled") {
            onAdStatus(false);
            return;
          }
          if (ins.clientHeight > 10) {
            onAdStatus(true);
            return;
          }
        }
      };
      const t1 = setTimeout(checkAd, 2000);
      const t2 = setTimeout(checkAd, 5000);
      return () => { clearTimeout(t1); clearTimeout(t2); };
    }
  }, []);

  return (
    <div className={`ad-container ${className}`} data-testid={`ad-slot-${slot}`}>
      <ins
        ref={adRef}
        className="adsbygoogle"
        style={style || { display: "block" }}
        data-ad-client="ca-pub-4465464714854276"
        data-ad-slot={slot}
        data-ad-format={format}
        data-full-width-responsive={responsive ? "true" : undefined}
        {...(layout ? { "data-ad-layout": layout } : {})}
        {...(layoutKey ? { "data-ad-layout-key": layoutKey } : {})}
      />
    </div>
  );
}

export function ArticleCardAd() {
  return (
    <div className="bg-card rounded-md border border-card-border overflow-hidden">
      <AdSense
        slot="3854634730"
        format="fluid"
        layoutKey="-6r+cy-10+8a-3"
        style={{ display: "block" }}
      />
    </div>
  );
}

export function InArticleAd() {
  return (
    <AdSense
      slot="4154017639"
      format="fluid"
      layout="in-article"
      style={{ display: "block", textAlign: "center" }}
      className="my-8"
    />
  );
}

export function MultiplexAd() {
  return (
    <div className="bg-card rounded-md border border-card-border overflow-hidden">
      <AdSense
        slot="4593001335"
        format="autorelaxed"
        style={{ display: "block" }}
        className="w-full min-h-[250px]"
      />
    </div>
  );
}

export function SidebarAd() {
  const [visible, setVisible] = useState(false);

  return (
    <div className={`sticky top-4 ${visible ? "" : "hidden"}`}>
      <div className="bg-card rounded-md border border-card-border p-4 mt-4">
        <AdSense
          slot="2398082838"
          format="auto"
          onAdStatus={(filled) => setVisible(filled)}
        />
      </div>
    </div>
  );
}