///////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2002-2026, Open Design Alliance (the "Alliance").
// All rights reserved.
//
// This software and its documentation and related materials are owned by
// the Alliance. The software may only be incorporated into application
// programs owned by members of the Alliance, subject to a signed
// Membership Agreement and Supplemental Software License Agreement with the
// Alliance. The structure and organization of this software are the valuable
// trade secrets of the Alliance and its suppliers. The software is also
// protected by copyright law and international treaty provisions. Application
// programs incorporating this software must include the following statement
// with their copyright notices:
//
//   This application incorporates Open Design Alliance software pursuant to a
//   license agreement with Open Design Alliance.
//   Open Design Alliance Copyright (C) 2002-2026 by Open Design Alliance.
//   All rights reserved.
//
// By use of this software, its documentation or related materials, you
// acknowledge and accept the above terms.
///////////////////////////////////////////////////////////////////////////////

import { Loader, LoadParams } from "@inweb/viewer-core";
import { Viewer } from "../Viewer";
import { ModelImpl } from "../Models/ModelImpl";
import { FileLoader } from "./FileLoader";

export class VSFFileLoader extends Loader {
  public viewer: Viewer;

  constructor(viewer: Viewer) {
    super();
    this.viewer = viewer;
  }

  override isSupport(file: any, format?: string): boolean {
    return (
      (typeof file === "string" || file instanceof globalThis.File || file instanceof ArrayBuffer) &&
      /vsf$/i.test(format)
    );
  }

  override async load(file: any, format?: string, params: LoadParams = {}): Promise<this> {
    if (!this.viewer.visualizeJs) return this;

    const visViewer = this.viewer.visViewer();

    const progress = (event: ProgressEvent) => {
      const { lengthComputable, loaded, total } = event;
      const progress = lengthComputable ? loaded / total : 1;
      this.viewer.emitEvent({ type: "geometryprogress", data: progress, file });
    };

    const loader = new FileLoader();
    loader.setRequestHeader(params.requestHeader);
    loader.setWithCredentials(params.withCredentials);
    loader.setAbortSignal(this.abortController.signal);

    const arrayBuffer = await loader.load(file, progress);
    const data = new Uint8Array(arrayBuffer);

    if (!this.viewer.visualizeJs) return this;

    try {
      visViewer.parseFile(data);
    } catch (error: any) {
      console.error("VSF parse error.", error);
      throw error;
    }

    const modelImpl = new ModelImpl();
    modelImpl.id = params.modelId || this.extractFileName(file);

    this.viewer.models.push(modelImpl);

    this.viewer.syncOptions();
    this.viewer.syncOverlay();

    this.viewer.emitEvent({ type: "databasechunk", data, file });
    this.viewer.update(true);

    return this;
  }
}