import express = require("express");
import SocketIO = require("socket.io");

declare namespace e {
    interface ExpressStatusMonitorConfig {
        title?: string | undefined;
        theme?: string | undefined;
        path?: string | undefined;
        socketPath?: string | undefined;
        websocket?: SocketIO.Server | null | undefined; // References a socket.io instance
        spans?: RetentionSpan[] | undefined;
        chartVisibility?: {
            cpu?: boolean | undefined;
            mem?: boolean | undefined;
            load?: boolean | undefined;
            /** @default true */
            heap?: boolean | undefined;
            responseTime?: boolean | undefined;
            rps?: boolean | undefined;
            statusCodes?: boolean | undefined;
        } | undefined;
        healthChecks?: HealthCheck[] | undefined;
        ignoreStartsWith?: string | undefined;
    }

    interface RetentionSpan {
        interval: number;
        retention: number;
    }
    interface HealthCheck {
        protocol: string;
        host: string;
        path: string;
        port: string | number;
    }
}

declare function e(config?: e.ExpressStatusMonitorConfig): express.RequestHandler;

export = e;