const path = require('path');

const _ = require('lodash');

const envData = require('../../config/env.json');

const {

getChallengesForLang,

createChallenge,

challengesDir,

getChallengesDirForLang

} = require('../../curriculum/getChallenges');

const { curriculumLocale } = envData;

exports.localeChallengesRootDir = getChallengesDirForLang(curriculumLocale);

exports.replaceChallengeNode = () => {

return async function replaceChallengeNode(filePath) {

// get the meta so that challengeOrder is accurate

const blockNameRe = /\d\d-[-\w]+\/([^/]+)\//;

const posix = path.normalize(filePath).split(path.sep).join(path.posix.sep);

const blockName = posix.match(blockNameRe)[1];

const metaPath = path.resolve(

__dirname,

`../../curriculum/challenges/_meta/${blockName}/meta.json`

);

delete require.cache[require.resolve(metaPath)];

const meta = require(metaPath);

return await createChallenge(

challengesDir,

filePath,

curriculumLocale,

meta

);

};

};

exports.buildChallenges = async function buildChallenges() {

const curriculum = await getChallengesForLang(curriculumLocale);

const superBlocks = Object.keys(curriculum);

const blocks = superBlocks

.map(superBlock => curriculum[superBlock].blocks)

.reduce((blocks, superBlock) => {

const currentBlocks = Object.keys(superBlock).map(key => superBlock[key]);

return blocks.concat(_.flatten(currentBlocks));

}, []);

const builtChallenges = blocks

.filter(block => !block.isPrivate)

.map(({ challenges }) => challenges)

.reduce((accu, current) => accu.concat(current), []);

return builtChallenges;

};