import type { Destination, RichBlock, MessageRef, MessageContent, PostMessageOpts } from '../platform/types.js';
interface MessageSender {
    postMessage(destination: Destination, content: MessageContent, opts?: PostMessageOpts): Promise<MessageRef>;
    updateMessage(ref: MessageRef, content: MessageContent): Promise<void>;
}
export interface OutboundQueueOpts {
    walPath?: string;
    adapter: MessageSender;
    ttlMs?: number;
}
export interface EnqueueInput {
    type: 'post' | 'update';
    channel: string;
    destination?: Destination;
    text: string;
    richBlocks?: RichBlock[];
    threadId?: string;
    messageId?: string;
}
export declare class OutboundQueue {
    private walPath;
    private adapter;
    private ttlMs;
    private mutex;
    private pending;
    private sentIds;
    /**
     * IDs currently being processed by the inline send path (OutputStream /
     * durablePost). drain() skips these to prevent double-sends. Entries are
     * claimed by buildDurableHooks.beforePost/beforeUpdate and released by
     * afterSent (on success) or onSendFailed (on permanent failure).
     * On restart, inFlight is empty — unfinished entries fall back to drain().
     */
    private inFlight;
    private opCount;
    private drainTimer;
    private stopped;
    constructor(opts: OutboundQueueOpts);
    enqueue(input: EnqueueInput): Promise<string>;
    /** Mark an entry as "being sent by the inline path" so drain() skips it. */
    claim(id: string): void;
    /** Release an in-flight claim (after success or permanent failure). */
    release(id: string): void;
    markSent(id: string, slackTs?: string): Promise<void>;
    recover(): Promise<number>;
    drain(): Promise<void>;
    compact(): Promise<void>;
    startDrainLoop(intervalMs?: number): void;
    stop(): Promise<void>;
    flush(): Promise<void>;
    getPendingCount(): number;
    private _coalesce;
    private _appendOp;
    private _readWAL;
}
export declare const outboundQueue: {
    instance: OutboundQueue | null;
};
export declare function initOutboundQueue(adapter: MessageSender, opts?: {
    walPath?: string;
    ttlMs?: number;
}): OutboundQueue;
export declare function getOutboundQueue(): OutboundQueue | null;
export declare function durablePost(queue: OutboundQueue, sender: MessageSender, destination: Destination, content: MessageContent, opts?: PostMessageOpts): Promise<MessageRef>;
export declare function durableUpdate(queue: OutboundQueue, sender: MessageSender, ref: MessageRef, content: MessageContent): Promise<void>;
export {};