import type { AttachmentUploadApi } from "./api.js";
import type { ReadyAttachment, SubmitAttachmentQueue } from "./submit-adapter.js";
export type AttachmentDraftState = "waiting" | "uploading" | "ready" | "failed";
export interface AttachmentDraft {
    readonly id: string;
    readonly displayName: string;
    readonly size: number;
    readonly state: AttachmentDraftState;
    readonly progress: number;
    readonly detectedType?: string;
    readonly fileRef?: string;
    readonly errorCode?: string;
}
export interface AttachmentQueueOptions {
    readonly concurrency?: number;
    readonly maxDraftFiles?: number;
    readonly maxDraftBytes?: number;
}
export declare class AttachmentQueueError extends Error {
    readonly code: string;
    readonly name = "AttachmentQueueError";
    constructor(code: string, message: string);
}
export declare class AttachmentQueue implements SubmitAttachmentQueue {
    private readonly api;
    private readonly sessions;
    private readonly concurrency;
    private readonly maxDraftFiles;
    private readonly maxDraftBytes;
    private running;
    private sequence;
    private pumpScheduled;
    constructor(api: AttachmentUploadApi, options?: AttachmentQueueOptions);
    enqueue(sessionId: string, files: Iterable<File>): readonly string[];
    getSnapshot(sessionId: string): readonly AttachmentDraft[];
    subscribe(sessionId: string, listener: () => void): () => void;
    hasDrafts(sessionId: string): boolean;
    waitUntilReady(sessionId: string): Promise<readonly ReadyAttachment[]>;
    cancel(sessionId: string, id: string): Promise<void>;
    retry(sessionId: string, id: string): void;
    remove(sessionId: string, id: string): Promise<void>;
    adoptAndClear(sessionId: string): Promise<void>;
    dispose(): void;
    private session;
    private publish;
    private schedulePump;
    private pump;
    private run;
}