/**
 * useOffer Hook - Single offer workflow with checkout session management
 *
 * Behavior copied from useOffersQuery but simplified for a single offer:
 * 1. Fetches offer data
 * 2. Auto-initializes checkout session when mainOrderId is provided
 * 3. Fetches order summary with variant options
 * 4. Updates line items when variant/quantity changes
 * 5. Pays with payOffer
 */
import { Offer } from '../../core/resources/offers';
export type { Offer };
/**
 * Line item displayed in the UI
 */
export interface OfferLineItem {
    id: string;
    variantId: string;
    variantName: string;
    productId: string;
    productName: string;
    productDescription: string | null;
    imageUrl: string | null;
    quantity: number;
    unitAmount: number;
    currency: string;
}
/**
 * Available variant option for a product
 */
export interface AvailableVariant {
    variantId: string;
    variantName: string;
    sku: string | null;
    imageUrl: string | null;
    unitAmount: number;
    currency: string;
    isDefault: boolean;
}
/**
 * User selection for a line item
 */
export interface LineItemSelection {
    variantId: string;
    quantity: number;
}
/**
 * Summary derived from offer with user selections
 */
export interface OfferPreviewSummary {
    items: OfferLineItem[];
    currency: string;
    totalAmount: number;
    totalAdjustedAmount: number;
}
export interface UseOfferQueryOptions {
    /**
     * The offer ID to fetch (required)
     */
    offerId: string;
    /**
     * Whether to fetch the offer automatically
     * @default true
     */
    enabled?: boolean;
    /**
     * Main order ID - when provided, auto-inits checkout session
     */
    mainOrderId?: string;
}
export interface UseOfferQueryResult {
    /** The fetched offer */
    offer: Offer | null;
    /** Loading state */
    isLoading: boolean;
    /** Whether order summary is being updated */
    isUpdatingSummary: boolean;
    /** Fetch error */
    error: Error | null;
    /** Preview summary with current selections */
    summary: OfferPreviewSummary | null;
    /** Line items with current selections */
    lineItems: OfferLineItem[];
    /** Get available variants for a product */
    getAvailableVariants: (productId: string) => AvailableVariant[];
    /** Select a variant for a product */
    selectVariant: (productId: string, variantId: string) => void;
    /** Update variant for a product (same as selectVariant) */
    updateVariant: (productId: string, variantId: string) => void;
    /** Update quantity for a product */
    updateQuantity: (productId: string, quantity: number) => void;
    /** Current selections per product */
    selections: Record<string, LineItemSelection>;
    /** Pay for the offer */
    payOffer: (orderId?: string) => Promise<{
        checkoutUrl: string;
    }>;
    /** Payment in progress */
    isPaying: boolean;
    /** Payment error */
    paymentError: Error | null;
    /** Checkout session ID (set after init) */
    checkoutSessionId: string | null;
    /** Whether checkout session is initializing */
    isInitializing: boolean;
    /** Whether variant is loading for a product */
    isLoadingVariant: (productId: string) => boolean;
}
export declare function useOfferQuery(options: UseOfferQueryOptions): UseOfferQueryResult;