import { AdvancedMetricType } from '../ui/generated/graphql';
import { RequestContext, ProductVariant, Order } from '@vendure/core';
import { Session } from './request-service';
/**
 * GroupId is used to group datapoints. For example 'product1', so that the plugin can find all datapoints for that product;
 */
export interface NamedDatapoint {
    legendLabel: string;
    value: number;
}
export interface MetricStrategy {
    code: string;
    /**
     * We need to know if the chart should format your metrics as
     *  numbers/amounts or as currency
     */
    metricType: AdvancedMetricType;
    /**
     * Setting to allow a user to select variants for the metrics.
     * For some metrics, like conversion, it doesn't make sense to allow variant selection
     */
    allowProductSelection: boolean;
    /**
     * Title to display on the chart.
     * Ctx can be used to localize the title
     */
    getTitle(ctx: RequestContext): string;
    /**
     * Calculate the aggregated datapoint for the given data.
     * E.g. the sum of all given data, or the average.
     *
     * This functions is called for each month.
     *
     * Return multiple datapoints for a multi line chart.
     * The name will be used as legend on the chart.
     *
     * @example
     * // Number of products sold
     * [
     *   {name: 'product1', value: 10 },
     *   {name: 'product2', value: 16 }
     * ]
     */
    calculateDataPoints(ctx: RequestContext, orders: Order[], sessions: Session[], variants: ProductVariant[]): NamedDatapoint[];
}