import { SecurityModeImplementation } from "./securityMode";

const sha1 = require("sha1");

function padleft(nbr: number) {
    return nbr.toString().padStart(2, "0");
}

function formatDate(date: Date) {
    const yyyy = date.getUTCFullYear();
    const MM = padleft(date.getUTCMonth() + 1); //January is 0!
    const dd = padleft(date.getUTCDate());
    const HH = padleft(date.getUTCHours());
    const mm = padleft(date.getUTCMinutes());

    return `${yyyy}${MM}${dd}${HH}${mm}`;
}

function getDirectConnectHash(secretKey: string, login: string, date: Date) {
    const tokenBase = secretKey + formatDate(date) + login;
    return sha1(tokenBase).toUpperCase();
}

export class DirectConnectSecurityMode implements SecurityModeImplementation {
    getSecurityHeaderParams(
        secretKey: string,
        login: string,
        date: Date
    ): Record<string, string> {
        const directConnectHash = getDirectConnectHash(secretKey, login, date);
        return {
            "x-login": login,
            "x-api-token": directConnectHash
        };
    }
    getSecurityQueryParams(
        secretKey: string,
        login: string,
        date: Date
    ): Record<string, string> {
        const directConnectHash = getDirectConnectHash(secretKey, login, date);
        return {
            "x-login": login,
            "x-api-token": directConnectHash
        };
    }
}