/*!
 * Copyright (c) Microsoft Corporation and contributors. All rights reserved.
 * Licensed under the MIT License.
 */
import { ISequencedClient } from "./clients.js";
/**
 * Proposal to set the given key/value pair.
 *
 * @remarks
 * Consensus on the proposal is achieved if the MSN is \>= the sequence number
 * at which the proposal is made and no client within the collaboration window rejects
 * the proposal.
 * @alpha
 */
export interface IProposal {
    /**
     * The key for the proposal.
     */
    key: string;
    /**
     * The value of the proposal.
     */
    value: unknown;
}
/**
 * Similar to {@link IProposal} except it also includes the sequence number when it was made.
 * @alpha
 */
export type ISequencedProposal = {
    sequenceNumber: number;
} & IProposal;
/**
 * Adds the sequence number at which the message was approved to an {@link ISequencedProposal}.
 * @alpha
 */
export type IApprovedProposal = {
    approvalSequenceNumber: number;
} & ISequencedProposal;
/**
 * Adds the sequence number at which the message was committed to an {@link IApprovedProposal}.
 * @alpha
 */
export type ICommittedProposal = {
    commitSequenceNumber: number;
} & IApprovedProposal;
/**
 * @deprecated This type is now unused and will be removed
 * Events fired by a Quorum in response to client tracking.
 * @internal
 *
 */
export interface IQuorumClientsEvents {
    (event: "addMember", listener: (clientId: string, details: ISequencedClient) => void): any;
    (event: "removeMember", listener: (clientId: string) => void): any;
    (event: "error", listener: (message: any) => void): any;
}
/**
 * Events fired by a Quorum in response to proposal tracking.
 * @internal
 * @deprecated This type is now unused and will be removed
 */
export interface IQuorumProposalsEvents {
    (event: "addProposal", listener: (proposal: ISequencedProposal) => void): any;
    (event: "approveProposal", listener: (sequenceNumber: number, key: string, value: unknown, approvalSequenceNumber: number) => void): any;
    (event: "error", listener: (message: any) => void): void;
}
/**
 * All events fired by {@link IQuorum}, both client tracking and proposal tracking.
 * @internal
 * @deprecated This type is now unused and will be removed
 */
export type IQuorumEvents = IQuorumClientsEvents & IQuorumProposalsEvents;
/**
 * Interface for tracking clients in the Quorum.
 * @public
 */
export interface IQuorumClients {
    getMembers(): Map<string, ISequencedClient>;
    getMember(clientId: string): ISequencedClient | undefined;
    on(event: "addMember", listener: (clientId: string, details: ISequencedClient) => void): any;
    on(event: "removeMember", listener: (clientId: string) => void): any;
    on(event: "error", listener: (message: any) => void): any;
    once: IQuorumClients["on"];
    off: IQuorumClients["on"];
}
/**
 * Interface for tracking proposals in the Quorum.
 * @alpha
 */
export interface IQuorumProposals {
    propose(key: string, value: unknown): Promise<void>;
    has(key: string): boolean;
    get(key: string): unknown;
    on(event: "addProposal", listener: (proposal: ISequencedProposal) => void): any;
    on(event: "approveProposal", listener: (sequenceNumber: number, key: string, value: unknown, approvalSequenceNumber: number) => void): any;
    on(event: "error", listener: (message: any) => void): void;
    once: IQuorumProposals["on"];
    off: IQuorumProposals["on"];
}
/**
 * Interface combining tracking of clients as well as proposals in the Quorum.
 * @alpha
 */
export interface IQuorum extends Omit<IQuorumClients, "on" | "once" | "off">, Omit<IQuorumProposals, "on" | "once" | "off"> {
    on: IQuorumClients["on"] & IQuorumProposals["on"];
    once: IQuorum["on"];
    off: IQuorum["on"];
}
/**
 * @internal
 */
export interface IProtocolState {
    sequenceNumber: number;
    minimumSequenceNumber: number;
    members: [string, ISequencedClient][];
    proposals: [number, ISequencedProposal, string[]][];
    values: [string, ICommittedProposal][];
}
/**
 * @alpha
 */
export interface IProcessMessageResult {
    immediateNoOp?: boolean;
}
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