const path = require("path");

const {green} = require("chalk");
const fse = require("fs-extra");

const cherryPick = require("./cherry-pick").default;

const targets = process.argv.slice(2);

const srcRoot = path.join(__dirname, "../src");
const typesRoot = path.join(__dirname, "../types");

const libRoot = path.join(__dirname, "../lib");
const esRoot = path.join(libRoot, "esm");

const step = require("./utils").step;
const shell = require("./utils").shell;
const error = require("./utils").error;

const clean = () => fse.existsSync(libRoot) && fse.removeSync(libRoot);

const has = (t) => !targets.length || targets.includes(t);

const buildTypes = step("generating .d.ts", () => shell(`yarn build:types`));

const copyTypes = (dest) => fse.copySync(typesRoot, dest, {overwrite: true});

const babel = (outDir, envName) => {
  shell(
    `yarn babel ${srcRoot} -x .js,.jsx,.ts,.tsx --out-dir ${outDir} --env-name "${envName}" --watch`,
  );
};

/**
 * Run babel over the src directory and output
 * compiled es modules (but otherwise es5) to /es
 */
const buildEsm = step("es modules", async () => {
  await babel(esRoot, "esm");
  await copyTypes(esRoot);
});

const buildDirectories = step("Linking directories", () =>
  cherryPick({
    inputDir: "../src/**",
    cjsDir: "cjs",
    esmDir: "esm",
    cwd: libRoot,
  }),
);

console.log(green(`Building targets: ${targets.length ? targets.join(", ") : "all"}\n`));

clean();

Promise.resolve(true)
  .then(buildTypes)
  .then(() => Promise.all([has("es") && buildEsm()]))
  .then(buildDirectories)
  .catch(error);