// based on https://github.com/AssemblyScript/binaryen.js

// @deno-types=https://cdn.jsdelivr.net/npm/binaryen@117.0.0/index.d.ts
import binaryen from "https://cdn.jsdelivr.net/npm/binaryen@117.0.0/index.min.js";

// Create a module with a single function
const myModule = new binaryen.Module();

myModule.addFunction(
  "add",
  binaryen.createType([binaryen.i32, binaryen.i32]),
  binaryen.i32,
  [binaryen.i32],
  myModule.block(null, [
    myModule.local.set(
      2,
      myModule.i32.add(
        myModule.local.get(0, binaryen.i32),
        myModule.local.get(1, binaryen.i32),
      ),
    ),
    myModule.return(
      myModule.local.get(2, binaryen.i32),
    ),
  ]),
);
myModule.addFunctionExport("add", "add");

// Optimize the module using default passes and levels
myModule.optimize();

// Validate the module
if (!myModule.validate()) {
  throw new Error("validation error");
}

// Generate text format and binary
const textData = myModule.emitText();
console.log(textData);
const wasmData = myModule.emitBinary();

// Example usage with the WebAssembly API
const compiled = new WebAssembly.Module(wasmData);
const instance = new WebAssembly.Instance(compiled, {});
const exports = instance.exports as { add(a: number, b: number): number };
console.log(exports.add(41, 1));