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

const { nvmTags } = require('../apiUrls');

const isNvmTag = data => data && typeof data.name === 'string';

const areNvmTags = data => Array.isArray(data) && data.every(isNvmTag);

function getLatestNvmVersion() {

const parseNvmVersions = nvmTagsData => {

if (!areNvmTags(nvmTagsData) || nvmTagsData.length === 0) {

// GitHub might rate-limit and we don't want to block development because of that

return { version: 'unknown' };

}

return { version: nvmTagsData[0].name };

};

return fetch(nvmTags, createGitHubHeaders())

.then(response => response.json())

.then(parseNvmVersions);

}

module.exports = getLatestNvmVersion;