export const useKeyboardShortcuts = () => {
    const shortcutsMap = new Map<string, () => void>();

    const normalize = (combo: string[]) =>
        combo.map(k => k.toLowerCase()).sort().join('+');

    const addShortcut = (combo: string[], callback: () => void) => {
        const normalizedKey = normalize(combo);
        shortcutsMap.set(normalizedKey, callback);

        return () => {
            shortcutsMap.delete(normalizedKey);
        };
    };

    const handleKeyDown = (event: KeyboardEvent) => {
        const isInput = ['INPUT', 'TEXTAREA'].includes((event.target as HTMLElement).tagName);
        if (isInput && !event.ctrlKey && !event.metaKey && event.key !== 'Escape') {
            return;
        }

        const keys: string[] = [];
        if (event.ctrlKey) keys.push('ctrl');
        if (event.metaKey) keys.push('meta');
        if (event.shiftKey) keys.push('shift');
        if (event.altKey) keys.push('alt');

        const mainKey = event.key.toLowerCase();
        if (!['control', 'shift', 'meta', 'alt'].includes(mainKey)) {
            keys.push(mainKey);
        }

        const pressedCombo = normalize(keys);

        if (shortcutsMap.has(pressedCombo)) {
            event.preventDefault();
            event.stopPropagation();
            shortcutsMap.get(pressedCombo)!();
        }
    };

    onMounted(() => {
        document.addEventListener('keydown', handleKeyDown);
    });

    onUnmounted(() => {
        document.removeEventListener('keydown', handleKeyDown);
    });

    return {
        addShortcut,
        handleKeyDown,
    };
};