import type { MetadataBearer as __MetadataBearer } from "@smithy/types";
import type { DescribeAppRequest, DescribeAppResponse } from "../models/models_0";
/**
 * @public
 */
export type { __MetadataBearer };
/**
 * @public
 *
 * The input for {@link DescribeAppCommand}.
 */
export interface DescribeAppCommandInput extends DescribeAppRequest {
}
/**
 * @public
 *
 * The output of {@link DescribeAppCommand}.
 */
export interface DescribeAppCommandOutput extends DescribeAppResponse, __MetadataBearer {
}
declare const DescribeAppCommand_base: {
    new (input: DescribeAppCommandInput): import("@smithy/core/client").CommandImpl<DescribeAppCommandInput, DescribeAppCommandOutput, import("..").ResiliencehubClientResolvedConfig, import("..").ServiceInputTypes, import("..").ServiceOutputTypes>;
    new (input: DescribeAppCommandInput): import("@smithy/core/client").CommandImpl<DescribeAppCommandInput, DescribeAppCommandOutput, import("..").ResiliencehubClientResolvedConfig, import("..").ServiceInputTypes, import("..").ServiceOutputTypes>;
    getEndpointParameterInstructions(): import("@smithy/types").EndpointParameterInstructions;
};
/**
 * <p>Describes an Resilience Hub application.</p>
 * @example
 * Use a bare-bones client and the command you need to make an API call.
 * ```javascript
 * import { ResiliencehubClient, DescribeAppCommand } from "@aws-sdk/client-resiliencehub"; // ES Modules import
 * // const { ResiliencehubClient, DescribeAppCommand } = require("@aws-sdk/client-resiliencehub"); // CommonJS import
 * // import type { ResiliencehubClientConfig } from "@aws-sdk/client-resiliencehub";
 * const config = {}; // type is ResiliencehubClientConfig
 * const client = new ResiliencehubClient(config);
 * const input = { // DescribeAppRequest
 *   appArn: "STRING_VALUE", // required
 * };
 * const command = new DescribeAppCommand(input);
 * const response = await client.send(command);
 * // { // DescribeAppResponse
 * //   app: { // App
 * //     appArn: "STRING_VALUE", // required
 * //     name: "STRING_VALUE", // required
 * //     description: "STRING_VALUE",
 * //     policyArn: "STRING_VALUE",
 * //     creationTime: new Date("TIMESTAMP"), // required
 * //     status: "Active" || "Deleting",
 * //     complianceStatus: "PolicyBreached" || "PolicyMet" || "NotAssessed" || "ChangesDetected" || "NotApplicable" || "MissingPolicy",
 * //     lastAppComplianceEvaluationTime: new Date("TIMESTAMP"),
 * //     resiliencyScore: Number("double"),
 * //     lastResiliencyScoreEvaluationTime: new Date("TIMESTAMP"),
 * //     tags: { // TagMap
 * //       "<keys>": "STRING_VALUE",
 * //     },
 * //     assessmentSchedule: "Disabled" || "Daily",
 * //     permissionModel: { // PermissionModel
 * //       type: "LegacyIAMUser" || "RoleBased", // required
 * //       invokerRoleName: "STRING_VALUE",
 * //       crossAccountRoleArns: [ // IamRoleArnList
 * //         "STRING_VALUE",
 * //       ],
 * //     },
 * //     eventSubscriptions: [ // EventSubscriptionList
 * //       { // EventSubscription
 * //         name: "STRING_VALUE", // required
 * //         eventType: "ScheduledAssessmentFailure" || "DriftDetected", // required
 * //         snsTopicArn: "STRING_VALUE",
 * //       },
 * //     ],
 * //     driftStatus: "NotChecked" || "NotDetected" || "Detected",
 * //     lastDriftEvaluationTime: new Date("TIMESTAMP"),
 * //     rtoInSecs: Number("int"),
 * //     rpoInSecs: Number("int"),
 * //     awsApplicationArn: "STRING_VALUE",
 * //   },
 * // };
 *
 * ```
 *
 * @param DescribeAppCommandInput - {@link DescribeAppCommandInput}
 * @returns {@link DescribeAppCommandOutput}
 * @see {@link DescribeAppCommandInput} for command's `input` shape.
 * @see {@link DescribeAppCommandOutput} for command's `response` shape.
 * @see {@link ResiliencehubClientResolvedConfig | config} for ResiliencehubClient's `config` shape.
 *
 * @throws {@link AccessDeniedException} (client fault)
 *  <p>You don't have permissions to perform the requested operation. The user or role that is
 *       making the request must have at least one IAM permissions policy attached that grants the
 *       required permissions.</p>
 *
 * @throws {@link InternalServerException} (server fault)
 *  <p>This exception occurs when there is an internal failure in the Resilience Hub
 *       service.</p>
 *
 * @throws {@link ResourceNotFoundException} (client fault)
 *  <p>This exception occurs when the specified resource could not be found.</p>
 *
 * @throws {@link ThrottlingException} (client fault)
 *  <p>This exception occurs when you have exceeded the limit on the number of requests per second.</p>
 *
 * @throws {@link ValidationException} (client fault)
 *  <p>This exception occurs when a request is not valid.</p>
 *
 * @throws {@link ResiliencehubServiceException}
 * <p>Base exception class for all service exceptions from Resiliencehub service.</p>
 *
 *
 * @public
 */
export declare class DescribeAppCommand extends DescribeAppCommand_base {
    /** @internal type navigation helper, not in runtime. */
    protected static __types: {
        api: {
            input: DescribeAppRequest;
            output: DescribeAppResponse;
        };
        sdk: {
            input: DescribeAppCommandInput;
            output: DescribeAppCommandOutput;
        };
    };
}