import factoryFn from '../libfaust-wasm/libfaust-wasm.cjs';
import wasmBinary from '../libfaust-wasm/libfaust-wasm.wasm';
import dataBinary from '../libfaust-wasm/libfaust-wasm.data';

export const FaustModuleFactoryFn = factoryFn;
export const FaustModuleFactoryWasm = wasmBinary;
export const FaustModuleFactoryData = dataBinary;

/**
 * Instantiate `FaustModule` using bundled binaries. Module constructor and files can be overriden.
 */
const instantiateFaustModule = async (
    FaustModuleFactoryIn = factoryFn,
    dataBinaryIn = dataBinary,
    wasmBinaryIn = wasmBinary
) => {
    const g = globalThis as any;
    if (g.AudioWorkletGlobalScope) {
        g.importScripts = () => {};
        g.self = { location: { href: '' } };
    }
    const faustModule = await FaustModuleFactoryIn({
        // Create a copy to guarantee a standard ArrayBuffer
        wasmBinary: new Uint8Array(wasmBinaryIn).buffer,
        getPreloadedPackage: (
            remotePackageName: string,
            remotePackageSize: number
        ) => {
            if (remotePackageName === 'libfaust-wasm.data') {
                // Create a copy to guarantee a standard ArrayBuffer
                return new Uint8Array(dataBinaryIn).buffer;
            }
            return new ArrayBuffer(0);
        }
    });
    if (g.AudioWorkletGlobalScope) {
        delete g.importScripts;
        delete g.self;
    }
    return faustModule;
};

export default instantiateFaustModule;