/**
 * @license
 * Copyright 2020 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { FirebaseApp } from '@firebase/app';
/**
 * Defines configuration options for the Performance Monitoring SDK.
 *
 * @public
 */
export interface PerformanceSettings {
    /** Whether to collect custom events. */
    dataCollectionEnabled?: boolean;
    /** Whether to collect out of the box events. */
    instrumentationEnabled?: boolean;
}
/**
 * The Firebase Performance Monitoring service interface.
 *
 * @public
 */
export interface FirebasePerformance {
    /**
     * The {@link @firebase/app#FirebaseApp} this `FirebasePerformance` instance is associated with.
     */
    app: FirebaseApp;
    /**
     * Controls the logging of automatic traces and HTTP/S network monitoring.
     */
    instrumentationEnabled: boolean;
    /**
     * Controls the logging of custom traces.
     */
    dataCollectionEnabled: boolean;
}
/**
 * The interface representing a `Trace`.
 *
 * @public
 */
export interface PerformanceTrace {
    /**
     * Starts the timing for the trace instance.
     */
    start(): void;
    /**
     * Stops the timing of the trace instance and logs the data of the instance.
     */
    stop(): void;
    /**
     * Records a trace from given parameters. This provides a direct way to use trace without a need to
     * start/stop. This is useful for use cases in which the trace cannot directly be used
     * (e.g. if the duration was captured before the Performance SDK was loaded).
     *
     * @param startTime - trace start time since epoch in millisec.
     * @param duration - The duraction of the trace in millisec.
     * @param options - An object which can optionally hold maps of custom metrics and
     * custom attributes.
     */
    record(startTime: number, duration: number, options?: {
        metrics?: {
            [key: string]: number;
        };
        attributes?: {
            [key: string]: string;
        };
    }): void;
    /**
     * Adds to the value of a custom metric. If a custom metric with the provided name does not
     * exist, it creates one with that name and the value equal to the given number. The value will be floored down to an
     * integer.
     *
     * @param metricName - The name of the custom metric.
     * @param num - The number to be added to the value of the custom metric. If not provided, it
     * uses a default value of one.
     */
    incrementMetric(metricName: string, num?: number): void;
    /**
     * Sets the value of the specified custom metric to the given number regardless of whether
     * a metric with that name already exists on the trace instance or not. The value will be floored down to an
     * integer.
     *
     * @param metricName - Name of the custom metric.
     * @param num - Value to of the custom metric.
     */
    putMetric(metricName: string, num: number): void;
    /**
     * Returns the value of the custom metric by that name. If a custom metric with that name does
     * not exist will return zero.
     *
     * @param metricName - Name of the custom metric.
     */
    getMetric(metricName: string): number;
    /**
     * Set a custom attribute of a trace to a certain value.
     *
     * @param attr - Name of the custom attribute.
     * @param value - Value of the custom attribute.
     */
    putAttribute(attr: string, value: string): void;
    /**
     * Retrieves the value which a custom attribute is set to.
     *
     * @param attr - Name of the custom attribute.
     */
    getAttribute(attr: string): string | undefined;
    /**
     * Removes the specified custom attribute from a trace instance.
     *
     * @param attr - Name of the custom attribute.
     */
    removeAttribute(attr: string): void;
    /**
     * Returns a map of all custom attributes of a trace instance.
     */
    getAttributes(): {
        [key: string]: string;
    };
}
declare module '@firebase/component' {
    interface NameServiceMapping {
        'performance': FirebasePerformance;
    }
}