"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.AWSSDKCredentialProvider = void 0;
const process = require("process");
const deps_1 = require("../../deps");
const error_1 = require("../../error");
/** @internal */
class AWSSDKCredentialProvider {
    /**
     * Create the SDK credentials provider.
     * @param credentialsProvider - The credentials provider.
     */
    constructor(credentialsProvider) {
        if (credentialsProvider) {
            this._provider = credentialsProvider;
        }
    }
    static get awsSDK() {
        AWSSDKCredentialProvider._awsSDK ??= (0, deps_1.getAwsCredentialProvider)();
        return AWSSDKCredentialProvider._awsSDK;
    }
    /**
     * The AWS SDK caches credentials automatically and handles refresh when the credentials have expired.
     * To ensure this occurs, we need to cache the `provider` returned by the AWS sdk and re-use it when fetching credentials.
     */
    get provider() {
        if ('kModuleError' in AWSSDKCredentialProvider.awsSDK) {
            throw AWSSDKCredentialProvider.awsSDK.kModuleError;
        }
        if (this._provider) {
            return this._provider;
        }
        let { AWS_STS_REGIONAL_ENDPOINTS = '', AWS_REGION = '' } = process.env;
        AWS_STS_REGIONAL_ENDPOINTS = AWS_STS_REGIONAL_ENDPOINTS.toLowerCase();
        AWS_REGION = AWS_REGION.toLowerCase();
        /** The option setting should work only for users who have explicit settings in their environment, the driver should not encode "defaults" */
        const awsRegionSettingsExist = AWS_REGION.length !== 0 && AWS_STS_REGIONAL_ENDPOINTS.length !== 0;
        /**
         * The following regions use the global AWS STS endpoint, sts.amazonaws.com, by default
         * https://docs.aws.amazon.com/sdkref/latest/guide/feature-sts-regionalized-endpoints.html
         */
        const LEGACY_REGIONS = new Set([
            'ap-northeast-1',
            'ap-south-1',
            'ap-southeast-1',
            'ap-southeast-2',
            'aws-global',
            'ca-central-1',
            'eu-central-1',
            'eu-north-1',
            'eu-west-1',
            'eu-west-2',
            'eu-west-3',
            'sa-east-1',
            'us-east-1',
            'us-east-2',
            'us-west-1',
            'us-west-2'
        ]);
        /**
         * If AWS_STS_REGIONAL_ENDPOINTS is set to regional, users are opting into the new behavior of respecting the region settings
         *
         * If AWS_STS_REGIONAL_ENDPOINTS is set to legacy, then "old" regions need to keep using the global setting.
         * Technically the SDK gets this wrong, it reaches out to 'sts.us-east-1.amazonaws.com' when it should be 'sts.amazonaws.com'.
         * That is not our bug to fix here. We leave that up to the SDK.
         */
        const useRegionalSts = AWS_STS_REGIONAL_ENDPOINTS === 'regional' ||
            (AWS_STS_REGIONAL_ENDPOINTS === 'legacy' && !LEGACY_REGIONS.has(AWS_REGION));
        this._provider =
            awsRegionSettingsExist && useRegionalSts
                ? AWSSDKCredentialProvider.awsSDK.fromNodeProviderChain({
                    clientConfig: { region: AWS_REGION }
                })
                : AWSSDKCredentialProvider.awsSDK.fromNodeProviderChain();
        return this._provider;
    }
    async getCredentials() {
        /*
         * Creates a credential provider that will attempt to find credentials from the
         * following sources (listed in order of precedence):
         *
         * - Environment variables exposed via process.env
         * - SSO credentials from token cache
         * - Web identity token credentials
         * - Shared credentials and config ini files
         * - The EC2/ECS Instance Metadata Service
         */
        try {
            const creds = await this.provider();
            return {
                AccessKeyId: creds.accessKeyId,
                SecretAccessKey: creds.secretAccessKey,
                Token: creds.sessionToken,
                Expiration: creds.expiration
            };
        }
        catch (error) {
            throw new error_1.MongoAWSError(error.message, { cause: error });
        }
    }
}
exports.AWSSDKCredentialProvider = AWSSDKCredentialProvider;
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