const fs = require("fs");
const convert = require("xml-js");

const getFile = name => {
  if (name === "en") {
    return `${process.cwd()}/app/src/main/res/values/strings.xml`;
  }

  return `${process.cwd()}/app/src/main/res/values-${name}/strings.xml`;
};
const be = fs.readFileSync(getFile("be"), "utf-8");
const en = fs.readFileSync(getFile("en"), "utf-8");

const beRAW = convert.xml2json(be, { compact: true, spaces: 4 });
const enRAW = convert.xml2json(en, { compact: true, spaces: 4 });
const beJSON = JSON.parse(beRAW).resources.string;
const enJSON = JSON.parse(enRAW).resources.string;

const difference = (be, en) => {
  const mapper = value => {
    return value._attributes.name;
  };

  const d1 = be.map(mapper);
  const d2 = en.map(mapper);

  const filter = d2.filter(value => {
    if (!d1.includes(value)) {
      return value;
    }
  });

  return filter;
};

const addFifferencesToFile = (fileName, differences) => {
  const filePath = getFile(fileName);

  const be = fs.readFileSync(filePath, "utf-8");
  const en = fs.readFileSync(getFile("en"), "utf-8");

  const enRAW = convert.xml2json(en, { spaces: 4 });
  const enJSON = JSON.parse(enRAW);

  const elements = enJSON.elements[0].elements
    .map((el, i) => {
      if (differences.includes(el.attributes.name)) {
        return el;
      }
      return;
    })
    .filter(el => el != null);

  const result = convert.json2xml({
    ...enJSON,
    elements
  });

  return result
    .replace('<?xml version="1.0" encoding="utf-8"?>', "")
    .replace("</string>", "</string>\n")
    .replace("<string>", "\xa0\xa0\xa0\xa0<string>");
};

const differences = difference(beJSON, enJSON);

console.log(addFifferencesToFile("be", differences));