const fs = require("fs");

const documentationFolder = "docs";

async function getFiles (directory) {

const files = [];

const dir = fs.opendirSync(directory);

for await (const dirent of dir) {

files.push(dirent.name);

}

return files.sort();

}

function filenameToTitle (filename) {

return filename.split(".").shift().replace(/_/g, " ");

}

async function buildSection (directory) {

const files = await getFiles(`${documentationFolder}/${directory}`);

const title = filenameToTitle(directory);

const content = [`- ${title}\n`];

for (const file of files) {

content.push(`\t- [${filenameToTitle(file)}](${directory}/${file})`);

}

return content.join("\n");

}

async function buildSidebar (watchEventType) {

if (watchEventType == "change") { return; }

console.log("Building _sidebar.md");

const content = `- [Home](README.md) \n\n` + await buildSection("JavaScript_Basics_Info") + "\n\n\n" + await buildSection("JavaScript_Advance_Info")+ "\n\n\n" + await buildSection("JavaScript_Basics") + "\n\n\n" + await buildSection("JavaScript_Advance") + "\n\n" + await buildSection("Exercise_Questions") + "\n\n" + await buildSection("Reference");

fs.writeFileSync(`${documentationFolder}/_sidebar.md`, content);

}

fs.watch(`${documentationFolder}/JavaScript_Basics_Info`, buildSidebar);

fs.watch(`${documentationFolder}/JavaScript_Advance_Info`, buildSidebar);

fs.watch(`${documentationFolder}/JavaScript_Basics`, buildSidebar);

fs.watch(`${documentationFolder}/JavaScript_Advance`, buildSidebar);

fs.watch(`${documentationFolder}/Exercise_Questions`, buildSidebar);

fs.watch(`${documentationFolder}/Reference`, buildSidebar);

buildSidebar();