#!/usr/bin/env node

'use strict';

const {exec} = require('child-process-promise');

const {existsSync} = require('fs');

const {join} = require('path');

const {getArtifactsList, logPromise} = require('../utils');

const theme = require('../theme');

const run = async ({build, cwd, releaseChannel}) => {

  const artifacts = await getArtifactsList(build);

  const buildArtifacts = artifacts.find(entry =>

    entry.path.endsWith('build.tgz')

  );

  if (!buildArtifacts) {

    console.log(

      theme`{error The specified build (${build}) does not contain any build artifacts.}`

    );

    process.exit(1);

  }

  // Download and extract artifact

  const {CIRCLE_CI_API_TOKEN} = process.env;

  let header = '';

  // Add Circle CI API token to request header if available.

  if (CIRCLE_CI_API_TOKEN != null) {

    header = '-H "Circle-Token: ${CIRCLE_CI_API_TOKEN}" ';

  }

  await exec(`rm -rf ./build`, {cwd});

  await exec(

    `curl -L $(fwdproxy-config curl) ${buildArtifacts.url} ${header}| tar -xvz`,

    {

      cwd,

    }

  );

  // Copy to staging directory

  // TODO: Consider staging the release in a different directory from the CI

  // build artifacts: `./build/node_modules` -> `./staged-releases`

  if (!existsSync(join(cwd, 'build'))) {

    await exec(`mkdir ./build`, {cwd});

  } else {

    await exec(`rm -rf ./build/node_modules`, {cwd});

  }

  let sourceDir;

  // TODO: Rename release channel to `next`

  if (releaseChannel === 'stable') {

    sourceDir = 'oss-stable';

  } else if (releaseChannel === 'experimental') {

    sourceDir = 'oss-experimental';

  } else if (releaseChannel === 'latest') {

    sourceDir = 'oss-stable-semver';

  } else {

    console.error('Internal error: Invalid release channel: ' + releaseChannel);

    process.exit(releaseChannel);

  }

  await exec(`cp -r ./build/${sourceDir} ./build/node_modules`, {cwd});

};

module.exports = async ({build, commit, cwd, releaseChannel}) => {

  let buildLabel;

  if (commit !== null) {

    buildLabel = theme`commit {commit ${commit}} (build {build ${build}})`;

  } else {

    buildLabel = theme`build {build ${build}}`;

  }

  return logPromise(

    run({build, cwd, releaseChannel}),

    theme`Downloading artifacts from Circle CI for ${buildLabel}`

  );

};