import { exec, OutputMode } from "https://deno.land/x/exec@0.0.5/mod.ts";
import { ensureFile } from "https://deno.land/std@0.95.0/fs/mod.ts";

const entry = 'https://scrapbox.io/api/code/deno-ja/最速でWeb_Assemblyを使ったweb_pageを試す';

// 必要なファイルをdownloadする
{
  const filename = 'lib.rs';
  await ensureFile(`./src/${filename}`);
  const res = await fetch(`${entry}/${filename}`);
  await Deno.writeTextFile(`./src/${filename}`, await res.text());
}
{
  const filename = 'Cargo.toml';
  await ensureFile(filename);
  const res = await fetch(`${entry}/${filename}`);
  await Deno.writeTextFile(filename, await res.text());
}
{
  const filename = 'index.js';
  await ensureFile(filename);
  const res = await fetch(`${entry}/${filename}`);
  await Deno.writeTextFile(filename, await res.text());
}
// compileを実行する
await exec('wasm-pack build --target web --release', {output: OutputMode.Capture, verbose: true});

// 予めUint8Arrayにしておく
const wasm = await Deno.readFile("./pkg/web_page_demo_bg.wasm");
await Deno.writeTextFile("./pkg/web_page_demo_bg.wasm.js", 
  `export const wasm = new Uint8Array([${wasm.join(",")}]);`);