/**
 * NotebookLM source ingestion (issue #25).
 *
 * v2.0.0 supports the two source types that cover the bulk of real usage:
 *   - `url`  — paste a website URL (NotebookLM crawls and indexes it)
 *   - `text` — paste raw text (treated as a copied document)
 *
 * File-upload, YouTube and Google-Drive ingestion are intentionally out of
 * scope for v2.0.0 — they require different overlay flows.
 *
 * Robustness strategy (2026-05, ported from the Fork's content-manager.ts):
 *
 *   1. Capture the *expected notebook UUID* from the URL up-front. NotebookLM
 *      sometimes redirects pasted-text uploads to a freshly-created notebook;
 *      we detect that and surface a clear error.
 *
 *   2. Resolve the dialog state defensively: if a dialog is already open we
 *      use it; otherwise we click the sidebar "Add source" button. The
 *      `[role="dialog"]` anchor is set synchronously on mount, so we do not
 *      have to race the Material `.mdc-dialog--open` animation class.
 *
 *   3. Source-type buttons no longer ship with aria-labels — see
 *      selectors.ts for the icon-/text-based anchors.
 *
 *   4. Insert verification is COUNT-BASED: snapshot
 *      `.single-source-container` count before the submit click, then poll
 *      after the dialog closes (up to 90 s — URL crawls are slow).
 */
import type { Page } from "patchright";
export type SourceType = "url" | "text";
export interface AddSourceInput {
    type: SourceType;
    /** URL when `type === "url"`, raw text when `type === "text"`. */
    content: string;
    /** Optional title shown in the source list. NotebookLM uses a default if omitted. */
    title?: string;
}
export interface AddSourceResult {
    success: boolean;
    type: SourceType;
    sourceCountBefore: number;
    sourceCountAfter: number;
    message?: string;
}
export declare function addSource(page: Page, input: AddSourceInput): Promise<AddSourceResult>;
/**
 * Count sources in the sidebar via two independent anchors:
 *
 *   1. `.single-source-container` — the per-row sidebar element. Most
 *      direct, but only present once the sidebar has hydrated.
 *
 *   2. `.cover-subtitle-source-count` — a header label of the form
 *      `"3 Quellen"` / `"3 sources"`. Robust to a collapsed or partially
 *      hydrated sidebar because it lives in the chat header instead.
 *
 * We return whichever produces a higher count; mismatches between the two
 * usually mean the sidebar hasn't caught up yet, in which case the header
 * is the authoritative ground truth.
 */
export declare function countSources(page: Page): Promise<number>;
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