"use client";

import { useEffect, useRef } from "react";
import { X } from "lucide-react";

interface KeyboardShortcutsHelpProps {
  open: boolean;
  onClose: () => void;
}

function Shortcut({ keys, label }: { keys: string[]; label: string }) {
  return (
    <div className="flex items-center justify-between py-2">
      <span className="text-sm text-zinc-300">{label}</span>
      <div className="flex items-center gap-1">
        {keys.map((key) => (
          <kbd
            key={key}
            className="inline-flex h-6 min-w-[1.5rem] items-center justify-center rounded border border-white/10 bg-white/[0.05] px-1.5 font-mono text-xs text-zinc-400"
          >
            {key}
          </kbd>
        ))}
      </div>
    </div>
  );
}

export function KeyboardShortcutsHelp({
  open,
  onClose,
}: KeyboardShortcutsHelpProps) {
  const overlayRef = useRef<HTMLDivElement>(null);

  useEffect(() => {
    if (!open) return;
    const handler = (e: KeyboardEvent) => {
      if (e.key === "Escape" || e.key === "?") {
        e.preventDefault();
        onClose();
      }
    };
    document.addEventListener("keydown", handler);
    return () => document.removeEventListener("keydown", handler);
  }, [open, onClose]);

  if (!open) return null;

  return (
    <div className="fixed inset-0 z-[90]" ref={overlayRef}>
      <div
        className="fixed inset-0 bg-black/60 backdrop-blur-sm"
        onClick={onClose}
        aria-hidden="true"
      />
      <div className="fixed inset-0 flex items-center justify-center px-4">
        <div
          role="dialog"
          aria-label="Keyboard shortcuts"
          className="w-full max-w-md rounded-xl border border-white/10 bg-[#111113] shadow-2xl shadow-black/50 animate-scale-in"
        >
          <div className="flex items-center justify-between px-5 py-4 border-b border-white/[0.06]">
            <h2 className="text-base font-semibold text-white">
              Keyboard Shortcuts
            </h2>
            <button
              onClick={onClose}
              className="p-1.5 rounded-lg text-zinc-400 hover:text-white hover:bg-white/[0.06] transition-colors"
              aria-label="Close shortcuts help"
            >
              <X className="w-4 h-4" />
            </button>
          </div>

          <div className="px-5 py-4 space-y-4">
            <div>
              <h3 className="text-xs font-medium text-zinc-500 uppercase tracking-wider mb-2">
                Navigation
              </h3>
              <div className="divide-y divide-white/[0.04]">
                <Shortcut keys={["j"]} label="Move down" />
                <Shortcut keys={["k"]} label="Move up" />
                <Shortcut keys={["Enter"]} label="Open selected" />
                <Shortcut keys={["Esc"]} label="Clear selection" />
              </div>
            </div>

            <div>
              <h3 className="text-xs font-medium text-zinc-500 uppercase tracking-wider mb-2">
                Go To
              </h3>
              <div className="divide-y divide-white/[0.04]">
                <Shortcut keys={["g", "h"]} label="Go to Home" />
                <Shortcut keys={["g", "g"]} label="Go to Generate" />
              </div>
            </div>

            <div>
              <h3 className="text-xs font-medium text-zinc-500 uppercase tracking-wider mb-2">
                General
              </h3>
              <div className="divide-y divide-white/[0.04]">
                <Shortcut
                  keys={["\u2318", "K"]}
                  label="Command palette"
                />
                <Shortcut keys={["?"]} label="Show shortcuts" />
              </div>
            </div>
          </div>

          <div className="px-5 py-3 border-t border-white/[0.06]">
            <p className="text-xs text-zinc-500 text-center">
              Press <kbd className="inline-flex h-4 items-center rounded border border-white/10 bg-white/[0.05] px-1 font-mono text-[10px] text-zinc-400">?</kbd> or <kbd className="inline-flex h-4 items-center rounded border border-white/10 bg-white/[0.05] px-1 font-mono text-[10px] text-zinc-400">Esc</kbd> to close
            </p>
          </div>
        </div>
      </div>
    </div>
  );
}