class KeyboardShortcuts {
    constructor() {
        this.shortcuts = new Map();
        this.enabled = true;
        this.init();
    }

    init() {
        document.addEventListener('keydown', (e) => {
            if (!this.enabled) return;

            const isInput = ['INPUT', 'TEXTAREA'].includes(e.target.tagName);
            const key = this.getKeyCombo(e);

            if (this.shortcuts.has(key)) {
                const { handler, allowInInput } = this.shortcuts.get(key);
                if (!isInput || allowInInput) {
                    e.preventDefault();
                    handler(e);
                }
            }
        });
    }

    getKeyCombo(e) {
        const parts = [];
        if (e.ctrlKey || e.metaKey) parts.push('ctrl');
        if (e.altKey) parts.push('alt');
        if (e.shiftKey) parts.push('shift');
        parts.push(e.key.toLowerCase());
        return parts.join('+');
    }

    register(keyCombo, handler, allowInInput = false) {
        this.shortcuts.set(keyCombo.toLowerCase(), { handler, allowInInput });
    }

    unregister(keyCombo) {
        this.shortcuts.delete(keyCombo.toLowerCase());
    }

    enable() {
        this.enabled = true;
    }

    disable() {
        this.enabled = false;
    }

    getRegisteredShortcuts() {
        return Array.from(this.shortcuts.keys());
    }
}

export const shortcuts = new KeyboardShortcuts();