import { SignatureV4 } from "@smithy/signature-v4";
export class SignatureV4MultiRegion {
    constructor(options) {
        this.sigv4Signer = new SignatureV4(options);
        this.signerOptions = options;
    }
    async sign(requestToSign, options = {}) {
        if (options.signingRegion === "*") {
            if (this.signerOptions.runtime !== "node")
                throw new Error("This request requires signing with SigV4Asymmetric algorithm. It's only available in Node.js");
            return this.getSigv4aSigner().sign(requestToSign, options);
        }
        return this.sigv4Signer.sign(requestToSign, options);
    }
    async presign(originalRequest, options = {}) {
        if (options.signingRegion === "*") {
            if (this.signerOptions.runtime !== "node")
                throw new Error("This request requires signing with SigV4Asymmetric algorithm. It's only available in Node.js");
            return this.getSigv4aSigner().presign(originalRequest, options);
        }
        return this.sigv4Signer.presign(originalRequest, options);
    }
    getSigv4aSigner() {
        if (!this.sigv4aSigner) {
            let CrtSignerV4;
            try {
                CrtSignerV4 = typeof require === "function" && require("@aws-sdk/signature-v4-crt").CrtSignerV4;
                if (typeof CrtSignerV4 !== "function")
                    throw new Error();
            }
            catch (e) {
                e.message =
                    `${e.message}\nPlease check if you have installed "@aws-sdk/signature-v4-crt" package explicitly. \n` +
                        "For more information please go to " +
                        "https://github.com/aws/aws-sdk-js-v3#functionality-requiring-aws-common-runtime-crt";
                throw e;
            }
            this.sigv4aSigner = new CrtSignerV4({
                ...this.signerOptions,
                signingAlgorithm: 1,
            });
        }
        return this.sigv4aSigner;
    }
}
