import { ArgumentNullError, Promise, PromiseHelper } from "../../common/Exports";
import { AuthInfo, IAuthentication } from "./IAuthentication";

const AuthHeader: string = "Authorization";

export class CognitiveTokenAuthentication implements IAuthentication {
    private fetchCallback: (authFetchEventId: string) => Promise<string>;
    private fetchOnExpiryCallback: (authFetchEventId: string) => Promise<string>;

    constructor(fetchCallback: (authFetchEventId: string) => Promise<string>, fetchOnExpiryCallback: (authFetchEventId: string) => Promise<string>) {
        if (!fetchCallback) {
            throw new ArgumentNullError("fetchCallback");
        }

        if (!fetchOnExpiryCallback) {
            throw new ArgumentNullError("fetchOnExpiryCallback");
        }

        this.fetchCallback = fetchCallback;
        this.fetchOnExpiryCallback = fetchOnExpiryCallback;
    }

    public Fetch = (authFetchEventId: string): Promise<AuthInfo> => {
        return  this.fetchCallback(authFetchEventId).OnSuccessContinueWith((token: string) => new AuthInfo(AuthHeader, token));
    }

    public FetchOnExpiry = (authFetchEventId: string): Promise<AuthInfo> => {
        return  this.fetchOnExpiryCallback(authFetchEventId).OnSuccessContinueWith((token: string) => new AuthInfo(AuthHeader, token));
    }
}