import iconv from 'iconv-lite';

import { isCategoryInclude } from '../lib/utils.js';

const media = ({ resources }, req, res, next) => {

const {

category = 'all',

format = 'raw',

encoding = 'utf-8',

} = req.parsedParams;

// Selete random resource

const files = [];

Object.entries(resources[req.baseUrl]).forEach(([key, value]) => {

if (isCategoryInclude(key, category)) files.push(...value);

});

if (files.length === 0) {

res.status(500);

next('No matching resource found');

return;

}

const result = files[Math.floor(Math.random() * files.length)];

// Send response

switch (format) {

case 'raw':

res.redirect(302, result.url);

break;

case 'json':

res

.set({ 'Content-Type': `application/json charset=${encoding}` })

.send(iconv.encode(JSON.stringify(result), encoding));

break;

default:

res.status(400);

next(`Invalid format: ${format}`);

break;

}

next();

};

export default media;