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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */

const path = require("path");

const util = require("util");

const fs = require("fs");

const _ = require("lodash");

const Bundler = require("parcel-bundler");

const convertSourceMap = require("convert-source-map");

const TARGET_NAME = "parcel";

module.exports = exports = async function(tests, dirname) {

  const fixtures = [];

  for (const [name, input] of tests) {

    const testFnName = _.camelCase(`${TARGET_NAME}-${name}`);

    const evalMaps = name.match(/-eval/);

    console.log(`Building ${TARGET_NAME} test ${name}`);

    const scriptPath = path.join(dirname, "output", TARGET_NAME, `${name}.js`);

    const bundler = new Bundler(input, {

      global: testFnName,

      hmr: false,

      watch: false,

      logLevel: 0,

      publicURL: ".",

      outDir: path.dirname(scriptPath),

      outFile: path.basename(scriptPath),

});

    await bundler.bundle();

    let code = fs.readFileSync(scriptPath, "utf8");

    // Parcel doesn't offer a way to explicitly export the default property

    // of the default object.

    code += `\n;${testFnName} = ${testFnName}.default;`;

    fs.writeFileSync(scriptPath, code);

    const mapMatch = convertSourceMap.mapFileCommentRegex.exec(code);

    const mapPath = path.resolve(path.dirname(scriptPath), mapMatch[1] || mapMatch[2]);

    const map = JSON.parse(fs.readFileSync(mapPath, "utf8"));

    map.sourceRoot = undefined;

    map.sources = map.sources.map(source =>

      source.replace(/^/, `${TARGET_NAME}://./${name}/`)

);

    fs.writeFileSync(mapPath, JSON.stringify(map));

    fixtures.push({

      name,

      testFnName,

      scriptPath,

      assets: [

        scriptPath,

        `${path.join(path.dirname(scriptPath), path.basename(scriptPath, path.extname(scriptPath)))}.map`,

});

  return {

    target: TARGET_NAME,

    fixtures

};

};