import type { FoodSearchItem, FoodSelection, NutritionFacts, ServingOption } from './models.js';
export type FoodPortionErrorCode = 'no_servings' | 'serving_not_found' | 'invalid_serving' | 'invalid_quantity';
export interface FoodPortionOptions {
    /** The serving to use. Defaults to the food's primary serving, or its first. */
    servingId?: string;
    /**
     * The amount eaten in the serving's unit, not a number of servings: 12 for 12 oz of a
     * "6 oz" serving. Defaults to the serving's own quantity, which is one serving.
     */
    quantity?: number;
}
/**
 * A validated serving and amount, with nutrition calculated locally and the selection to send
 * to Food Logs and Glucose.
 */
export declare class FoodPortion {
    readonly foodId: string;
    readonly serving: ServingOption;
    /** The amount eaten in the serving's unit: 6 for one "6 oz" serving, 12 for two. */
    readonly quantity: number;
    /** Nutrition for `quantity`, scaled from the food's nutrients by the serving's scaling factor. */
    readonly nutrition: NutritionFacts;
    readonly totalWeightGrams: number | null;
    readonly glycemicIndex: number | null;
    readonly glycemicLoad: number | null;
    /**
     * The food, serving, and number of servings for `foodLogs.create`, `foodLogs.update`, and
     * `glucose.predict`. `serving.quantity` counts servings: `quantity` divided by the serving's
     * own quantity, so 12 oz of a "6 oz" serving is 2.
     */
    readonly selection: FoodSelection;
    private constructor();
    static from(food: FoodSearchItem, options?: FoodPortionOptions): FoodPortion;
}
export declare class FoodPortionError extends TypeError {
    readonly code: FoodPortionErrorCode;
    constructor(code: FoodPortionErrorCode);
}
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