'use strict';

const CLOCK_SKEW_ERROR_CODES = [
    "AuthFailure",
    "InvalidSignatureException",
    "RequestExpired",
    "RequestInTheFuture",
    "RequestTimeTooSkewed",
    "SignatureDoesNotMatch",
];
const THROTTLING_ERROR_CODES = [
    "BandwidthLimitExceeded",
    "EC2ThrottledException",
    "LimitExceededException",
    "PriorRequestNotComplete",
    "ProvisionedThroughputExceededException",
    "RequestLimitExceeded",
    "RequestThrottled",
    "RequestThrottledException",
    "SlowDown",
    "ThrottledException",
    "Throttling",
    "ThrottlingException",
    "TooManyRequestsException",
    "TransactionInProgressException",
];
const TRANSIENT_ERROR_CODES = ["TimeoutError", "RequestTimeout", "RequestTimeoutException"];
const TRANSIENT_ERROR_STATUS_CODES = [500, 502, 503, 504];
const NODEJS_TIMEOUT_ERROR_CODES = ["ECONNRESET", "ECONNREFUSED", "EPIPE", "ETIMEDOUT"];
const NODEJS_NETWORK_ERROR_CODES = ["EHOSTUNREACH", "ENETUNREACH", "ENOTFOUND"];

const isRetryableByTrait = (error) => error?.$retryable !== undefined;
const isClockSkewError = (error) => CLOCK_SKEW_ERROR_CODES.includes(error.name);
const isClockSkewCorrectedError = (error) => error.$metadata?.clockSkewCorrected;
const isBrowserNetworkError = (error) => {
    const errorMessages = new Set([
        "Failed to fetch",
        "NetworkError when attempting to fetch resource",
        "The Internet connection appears to be offline",
        "Load failed",
        "Network request failed",
    ]);
    const isValid = error && error instanceof TypeError;
    if (!isValid) {
        return false;
    }
    return errorMessages.has(error.message);
};
const isThrottlingError = (error) => error.$metadata?.httpStatusCode === 429 ||
    THROTTLING_ERROR_CODES.includes(error.name) ||
    error.$retryable?.throttling == true;
const isTransientError = (error, depth = 0) => isRetryableByTrait(error) ||
    isClockSkewCorrectedError(error) ||
    (error.name === "InvalidSignatureException" && error.message?.includes("Signature expired")) ||
    TRANSIENT_ERROR_CODES.includes(error.name) ||
    NODEJS_TIMEOUT_ERROR_CODES.includes(error?.code || "") ||
    NODEJS_NETWORK_ERROR_CODES.includes(error?.code || "") ||
    TRANSIENT_ERROR_STATUS_CODES.includes(error.$metadata?.httpStatusCode || 0) ||
    isBrowserNetworkError(error) ||
    isNodeJsHttp2TransientError(error) ||
    (error.cause !== undefined && depth <= 10 && isTransientError(error.cause, depth + 1));
const isServerError = (error) => {
    if (error.$metadata?.httpStatusCode !== undefined) {
        const statusCode = error.$metadata.httpStatusCode;
        if (500 <= statusCode && statusCode <= 599 && !isTransientError(error)) {
            return true;
        }
        return false;
    }
    return false;
};
function isNodeJsHttp2TransientError(error) {
    return error.code === "ERR_HTTP2_STREAM_ERROR" && error.message.includes("NGHTTP2_REFUSED_STREAM");
}

exports.isBrowserNetworkError = isBrowserNetworkError;
exports.isClockSkewCorrectedError = isClockSkewCorrectedError;
exports.isClockSkewError = isClockSkewError;
exports.isNodeJsHttp2TransientError = isNodeJsHttp2TransientError;
exports.isRetryableByTrait = isRetryableByTrait;
exports.isServerError = isServerError;
exports.isThrottlingError = isThrottlingError;
exports.isTransientError = isTransientError;
