import { StepExternalByteStore } from "../../step/step_buffer_provider.js";
import { FlatMesh, IfcGeometry, RawLineData, Vector } from "./ifc_api.js";
import { PropertiesPassthrough } from "./properties_passthrough.js";
export interface IfcApiModelPassthrough {
    properties: PropertiesPassthrough;
    getFlatMesh(expressID: number): FlatMesh;
    loadAllGeometry(): Vector<FlatMesh>;
    streamAllMeshesWithTypes(types: number[], meshCallback: (mesh: FlatMesh) => void): void;
    streamAllMeshes(meshCallback: (mesh: FlatMesh) => void): void;
    getCoordinationMatrix(): number[];
    getAllLines(): Vector<number>;
    getLineIDsWithType(type: number): Vector<number>;
    getRawLineData(expressID: number): RawLineData;
    flattenLine(line: any): void;
    getLine(expressID: number, flatten?: boolean): string | void;
    getGeometry(geometryExpressID: number): IfcGeometry;
    /**
     * Optional: drop the model's materialised entity/descriptor caches,
     * returning that memory. Entities rematerialise on next access.
     */
    releaseEntityCache?(): void;
    /**
     * Optional: true when the model's source bytes are spilled to an
     * external store and served through on-demand windows.
     */
    readonly sourceIsExternal?: boolean;
    /**
     * Optional: release the resident source buffer, serving subsequent
     * record reads through windows paged from the given external store.
     */
    spillSourceToExternalStore?(store: StepExternalByteStore, chunkBytes?: number, maxResidentChunks?: number): void;
    /**
     * Optional: page in the byte range backing a record so a following
     * synchronous read succeeds. Fast no-op while fully resident.
     */
    ensureLineResident?(expressID: number): Promise<void>;
    /**
     * Optional: lazily iterate the express IDs of all root-derived
     * (GlobalId-bearing) entities via the type index, without
     * materialising entities or touching the source buffer.
     * Multi-mapped entities may repeat; callers should dedupe.
     */
    rootExpressIDs?(): IterableIterator<number>;
}
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