import * as THREE from 'three';
import * as OBC from 'openbim-components';
import * as WEBIFC from 'web-ifc';

/**
 * @namespace BIM
 */
const BIM = {};

/**
 * 
 * @param {HTMLElement} container The scene container element
 * @returns {object} {components, world}
 */
BIM.init = function (container) {
    const components = new OBC.Components();
    const worlds = components.get(OBC.Worlds);

    const world = worlds.create();
    
    world.scene = new OBC.SimpleScene(components);
    world.renderer = new OBC.SimpleRenderer(components, container);
    world.camera = new OBC.SimpleCamera(components);

    // Starts the app and updates components at 60 fps
    components.init();
    this.world = world;
    this.components = components;
}
/**
 * @param {HTMLElement} container The scene container element
 * @returns {OBC.Components}
 */
BIM.createScene = function (container) {
    this.init(container);
    this.world.scene.setup();
    // Add a grid to the scene
    const grids = this.components.get(OBC.Grids);
    const grid = grids.create(this.world);
    // (zoom_level, position)
    this.world.camera.controls.setLookAt(15, 15, 15, 0, 0, 0);
}
/**
 * @todo Serve web-ifc.wasm locally via AJAX
 * @param {OBC.Components} components 
 * @param {ArrayBuffer} buffer The uploaded IFC file 
 */
BIM.loadIfc = async function (buffer) {
    const fragments = this.components.get(OBC.FragmentsManager);
    // Clean memory before uploading new file
    fragments.dispose();

    const fragmentIfcLoader = this.components.get(OBC.IfcLoader);
    // NOTE: loads web-ifc WASM from https://unpkg.com/web-ifc@0.0.53/
    //await fragmentIfcLoader.setup();
    fragmentIfcLoader.settings.wasm = {
      path: "./vendor/web-ifc/",
      absolute: false
    };
    // Excludes IFC categories from the fragment
    const excludedCats = [
        WEBIFC.IFCTENDONANCHOR,
        WEBIFC.IFCREINFORCINGBAR,
        WEBIFC.IFCREINFORCINGELEMENT,
    ];

    for (const cat of excludedCats) {
        fragmentIfcLoader.settings.excludedCategories.add(cat);
    }

    fragmentIfcLoader.settings.webIfc.COORDINATE_TO_ORIGIN = true;
    fragmentIfcLoader.settings.webIfc.OPTIMIZE_PROFILES = true;

    const model = await fragmentIfcLoader.load(buffer);
    model.name = "Test";
    this.world.scene.three.add(model);

    // Useful?
    this.fragments = fragments;

    return model;
}

export default BIM;