"use client";
import { useEffect } from "react";

interface KeyboardShortcut {
  key: string;
  ctrl?: boolean;
  shift?: boolean;
  alt?: boolean;
  handler: (e: KeyboardEvent) => void;
  // Only fire when no input/modal is focused
  when?: () => boolean;
}

/**
 * Shared keyboard shortcut hook.
 * Registers shortcuts at the LayoutShell level (closest to root).
 * Uses keydown events with preventDefault only when needed.
 */
export function useKeyboardShortcuts(shortcuts: KeyboardShortcut[]) {
  useEffect(() => {
    const handler = (e: KeyboardEvent) => {
      for (const shortcut of shortcuts) {
        const matchesKey = e.key === shortcut.key;
        const matchesCtrl = shortcut.ctrl ? e.ctrlKey || e.metaKey : !e.ctrlKey && !e.metaKey;
        const matchesShift = shortcut.shift ? e.shiftKey : !e.shiftKey;
        const matchesAlt = shortcut.alt ? e.altKey : !e.altKey;

        if (matchesKey && matchesCtrl && matchesShift && matchesAlt) {
          if (shortcut.when && !shortcut.when()) continue;
          e.preventDefault();
          shortcut.handler(e);
        }
      }
    };

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