/**
 * Contract interfaces for optional native runtime services.
 *
 * Default implementations:
 * - `@veryfront/ext-document-kreuzberg` for `DocumentExtractor`
 * - `@veryfront/ext-db-sqlite` for `SqliteStore`
 *
 * @module extensions/compat/native-services
 */
/**
 * Minimal interface for a prepared SQLite statement, compatible with
 * `better-sqlite3`'s `Statement` shape.
 */
export interface SqliteStatement {
    get(...params: unknown[]): unknown;
    run(...params: unknown[]): void;
    all(...params: unknown[]): unknown[];
}
/**
 * Minimal interface for a SQLite database connection, compatible with
 * `better-sqlite3`'s `Database` shape as consumed by `SqliteKv`.
 *
 * Mirrors `SqliteDatabase` in `src/platform/compat/kv/types.ts`. Kept
 * separate here so extensions can import from the public
 * `veryfront/extensions/compat` entrypoint without taking a dependency
 * on internal platform paths.
 */
export interface SqliteDatabase {
    exec(sql: string): void;
    prepare(sql: string): SqliteStatement;
    close(): void;
}
/**
 * Shape returned by the kreuzberg document-extraction module.
 *
 * Matches the subset used by `importKreuzberg()` in `opaque-deps.ts`.
 */
export interface KreuzbergExtractor {
    extractBytes(data: Uint8Array, mimeType: string, config?: Record<string, unknown> | null): Promise<{
        content: string;
    }>;
}
export interface DocumentExtractionProgressEvent {
    unit: "file" | "page" | "slide";
    current: number;
    total?: number;
    characters?: number;
}
export type DocumentExtractionProgress = (event: DocumentExtractionProgressEvent) => void | Promise<void>;
export interface DocumentExtractionOptions {
    onProgress?: DocumentExtractionProgress;
    idleTimeoutMs?: number;
    hardTimeoutMs?: number;
}
/**
 * Document extraction contract.
 */
export interface DocumentExtractor {
    /**
     * Initialise and return the kreuzberg document-extraction module.
     *
     * Callers should fall back to a "no extraction" path when this
     * method is absent or throws.
     */
    importKreuzberg?(): Promise<KreuzbergExtractor>;
    /**
     * Extract text from a document buffer.
     *
     * Implementations may run extraction inside an isolated worker or call a
     * native implementation directly.
     */
    extractInWorker?(buffer: ArrayBuffer, mimeType: string, options?: DocumentExtractionOptions): Promise<string>;
}
/**
 * SQLite-backed storage contract.
 */
export interface SqliteStore {
    /**
     * Open (or create) a SQLite database at `path`.
     *
     * Returns a database compatible with `SqliteKv`.
     * When `path` is omitted an in-memory database is created.
     *
     * Callers should fall back to the in-memory KV when this method is
     * absent or throws.
     */
    openSqliteDatabase?(path?: string): Promise<SqliteDatabase>;
}
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