/**
 * @module CircuitBreaker
 */
import { type ClientSession, type CollectionOptions, type Db, type MongoClient, type ObjectId } from "mongodb";
import { type ICircuitBreakerStorageAdapter, type ICircuitBreakerStorageAdapterTransaction } from "../../../../circuit-breaker/contracts/_module.js";
import { type IReadableContext } from "../../../../execution-context/contracts/_module.js";
import { type ISerde } from "../../../../serde/contracts/_module.js";
import { type IDeinitizable, type IInitizable, type InvokableFn } from "../../../../utilities/_module.js";
/**
 * IMPORT_PATH: `"@daiso-tech/core/circuit-breaker/mongodb-circuit-breaker-storage-adapter"`
 * @group Adapters
 */
export type MongodbCircuitBreakerStorageDocument = {
    _id: ObjectId;
    key: string;
    state: string;
};
/**
 * Configuration for `MongodbCircuitBreakerStorageAdapter`.
 * Requires a MongoDB `Db` instance.
 *
 * IMPORT_PATH: `"@daiso-tech/core/circuit-breaker/mongodb-circuit-breaker-storage-adapter"`
 * @group Adapters
 */
export type MongodbCircuitBreakerStorageAdapterSettings = {
    /**
     * The MongoDB `MongoClient` instance, required for transaction support.
     */
    client: MongoClient;
    /**
     * The MongoDB `Db` instance to store circuit-breaker state in.
     */
    database: Db;
    /**
     * Name of the MongoDB collection used to store circuit-breaker state records.
     * @default "circuitBreaker"
     */
    collectionName?: string;
    /**
     * Additional options passed when creating or accessing the MongoDB collection.
     */
    collectionSettings?: CollectionOptions;
    /**
     * Serde instance for serializing and deserializing circuit-breaker state to and from strings.
     */
    serde: ISerde<string>;
    /**
     * When `true`, operations are wrapped in MongoDB transactions for atomicity.
     * Requires a Replica Set or sharded cluster that supports transactions.
     * @default true
     */
    enableTransactions?: boolean;
};
/**
 * To utilize the `MongodbCircuitBreakerStorageAdapter`, you must install the [`"mongodb"`](https://www.npmjs.com/package/mongodb) package.
 *
 * Note in order to use `MongodbCircuitBreakerStorageAdapter` correctly, you need to use a database that has support for transactions.
 *
 * IMPORT_PATH: `"@daiso-tech/core/circuit-breaker/mongodb-circuit-breaker-storage-adapter"`
 * @group Adapters
 */
export declare class MongodbCircuitBreakerStorageAdapter<TType = unknown> implements ICircuitBreakerStorageAdapter<TType>, IInitizable, IDeinitizable {
    private readonly collection;
    private readonly client;
    private readonly serde;
    private readonly enableTransactions;
    /**
     * @example
     * ```ts
     * import { MongodbCircuitBreakerStorageAdapter } from "@daiso-tech/core/circuit-breaker/mongodb-circuit-breaker-storage-adapter";
     * import { MongoClient } from "mongodb";
     * import { Serde } from "@daiso-tech/core/serde";
     * import { SuperJsonSerdeAdapter } from "@daiso-tech/core/serde/super-json-serde-adapter"
     *
     * const client = await MongoClient.connect("YOUR_MONGODB_CONNECTION_STRING");
     * const database = client.db("database");
     * const serde = new Serde(new SuperJsonSerdeAdapter());
     * const circuitBreakerStorageAdapter = new MongodbCircuitBreakerStorageAdapter({
     *   client,
     *   database,
     *   serde
     * });
     * // You need initialize the adapter once before using it.
     * await circuitBreakerStorageAdapter.init()
     * ```
     */
    constructor(settings: MongodbCircuitBreakerStorageAdapterSettings);
    /**
     * Removes the collection where the circuit breaker keys are stored and all it's related indexes.
     * Note all circuit breaker data will be removed.
     */
    deInit(): Promise<void>;
    /**
     * Creates all related indexes.
     * Note the `init` method needs to be called once before using the adapter.
     */
    init(): Promise<void>;
    private upsert;
    private _transaction;
    transaction<TValue>(_context: IReadableContext, fn: InvokableFn<[
        transaction: ICircuitBreakerStorageAdapterTransaction<TType>
    ], Promise<TValue>>): Promise<TValue>;
    find(_context: IReadableContext, key: string, session?: ClientSession): Promise<TType | null>;
    remove(_context: IReadableContext, key: string, session?: ClientSession): Promise<void>;
}