"use client";

import { useEffect, useState } from "react";
import { useRouter } from "next/navigation";
import type { PinballInstance } from "@valknar/vpinball-wasm";
import { useIdleTimer } from "./useIdleTimer";
import GameInfoPanel from "@/components/GameInfoPanel";
import type { TableInfo } from "@/lib/pinball/types";

export interface CoinDoorHudProps {
  instanceRef: React.RefObject<PinballInstance | null>;
  tableInfo: TableInfo;
  loadTimeMs: number | null;
}

function HudButton({
  label,
  shortLabel,
  active,
  onClick,
}: {
  label: string;
  shortLabel?: string;
  active?: boolean;
  onClick: () => void;
}) {
  return (
    <button
      type="button"
      onClick={onClick}
      aria-pressed={active}
      className={`rounded-sm border px-2 py-1 font-mono text-xs tracking-widest transition sm:px-3 sm:py-1.5 ${
        active
          ? "border-marquee bg-marquee/20 text-marquee"
          : "border-chrome/40 bg-black/30 text-chrome hover:border-arc hover:text-arc"
      }`}
    >
      {shortLabel ? (
        <>
          <span className="sm:hidden">{shortLabel}</span>
          <span className="hidden sm:inline">{label}</span>
        </>
      ) : (
        label
      )}
    </button>
  );
}

export default function CoinDoorHud({ instanceRef, tableInfo, loadTimeMs }: CoinDoorHudProps) {
  const router = useRouter();
  const isIdle = useIdleTimer(3000);
  const [showInfo, setShowInfo] = useState(false);
  const [isFullscreen, setIsFullscreen] = useState(false);

  useEffect(() => {
    const onChange = () => setIsFullscreen(Boolean(document.fullscreenElement));
    document.addEventListener("fullscreenchange", onChange);
    return () => document.removeEventListener("fullscreenchange", onChange);
  }, []);

  const handleFullscreen = () => {
    instanceRef.current?.requestFullscreen();
  };

  const handleEject = () => {
    // usePinballInstance's unmount cleanup (triggered by this navigation)
    // handles stop()+dispose() itself, sequenced to avoid hanging the tab.
    router.push("/");
  };

  return (
    <>
      <div
        data-hud
        className={`absolute inset-x-0 top-0 z-10 flex items-center justify-between gap-1.5 border-b border-chrome/30 bg-ash/90 px-2 py-2 backdrop-blur transition-opacity duration-300 sm:gap-3 sm:px-4 ${
          isIdle ? "pointer-events-none opacity-0" : "opacity-100"
        }`}
      >
        <div className="flex min-w-0 items-center gap-2">
          <span className="shrink-0 font-display text-lg tracking-wide text-marquee">VPINBALL</span>
          <span className="hidden truncate font-mono text-xs text-chrome sm:inline">
            {tableInfo.name}
          </span>
        </div>
        <div className="flex shrink-0 items-center gap-1.5 sm:gap-2">
          <HudButton label="INFO" active={showInfo} onClick={() => setShowInfo((v) => !v)} />
          <HudButton
            label={isFullscreen ? "EXIT FS" : "FULLSCREEN"}
            shortLabel={isFullscreen ? "EXIT" : "FS"}
            active={isFullscreen}
            onClick={handleFullscreen}
          />
          <HudButton label="EJECT" onClick={handleEject} />
        </div>
      </div>

      {showInfo && (
        <div className="absolute inset-x-2 top-14 z-10 sm:inset-x-auto sm:right-4 sm:top-16">
          <GameInfoPanel tableInfo={tableInfo} loadTimeMs={loadTimeMs} />
        </div>
      )}
    </>
  );
}