import project, { generateBase } from './project';

import files from './files';

export default function generateRobots() {

if(files['robots.txt']) return files['robots.txt'];

const lines = []

lines.push('User-Agent: *');

if(!project.disallow.includes('/')) {

lines.push(`Allow: ${project.root}`);

}

for(const path of project.disallow) {

lines.push(`Disallow: ${path}`);

}

if(project.sitemap) {

if(project.sitemap === true) {

lines.push(`Sitemap: ${generateBase()}/sitemap.xml`);

} else if (project.sitemap.indexOf('//') === -1) {

lines.push(`Sitemap: ${generateBase()}${project.sitemap}`);

} else {

lines.push(`Sitemap: ${project.sitemap}`);

}

}

files['robots.txt'] = lines.join(`\n`);

return files['robots.txt']

}