var argv = require("minimist")(process.argv.slice(2));

const fs = require("fs");
const folder = "./src/components/";

if (!argv["target"]) {
  console.error(
    "please provide Vuepress folder address as an argument. i.e '--target ../documentation/docs'"
  );
  process.exit();
}

const target = argv["target"];
function readFolder(folder, subName) {
  const files = fs.readdirSync(folder);
  var list = [];
  files.forEach(file => {
    const stat = fs.statSync(folder + "/" + file);
    if (stat.isDirectory()) {
      const dir = `${folder}/${file}/`;
      list = list.concat(readFolder(dir, file));
    } else {
      if (file.includes(".md") && !!subName) {
        list.push({
          file: fs.readFileSync(`${folder}/${file}`),
          name: subName
        });
      }
    }
  });
  return list;
}

function watchFolder(folder, cb) {
  const files = fs.readdirSync(folder);
  files.forEach(file => {
    const stat = fs.statSync(folder + "/" + file);
    if (stat.isDirectory()) {
      const dir = `${folder}${file}/`;
      debouncedWatch(dir, cb);
    }
  });
}

function debouncedWatch(dir, cb) {
  let fsWait = false;
  fs.watch(dir, (_, filename) => {
    if (filename) {
      if (fsWait) return;
      fsWait = setTimeout(() => {
        fsWait = false;
      }, 100);
      console.log(`${filename} file Changed`);
      cb();
    }
  });
}

watchFolder(folder, () => {
  const files = readFolder(folder);
  files.forEach(file => {
    console.log("writing docs for: ", file.name);
    fs.writeFileSync(`${target}${file.name}.md`, file.file);
  });
});