const http = require('http')

const HOSTNAME = process.env.HOSTNAME || '0.0.0.0'
const PORT = process.env.PORT || 8080

const server = http.createServer((req, res) => {
    if (req.method !== 'GET') return error(res, 405)
    if (req.url === '/todo') return todo(res)
    if (req.url === '/') return index(res)
    error(res, 404)
});

function error(res, code) {
    res.statusCode = code
    res.end(`{"error": "${http.STATUS_CODES[code]}"}`)
}

function todo(res) {
    res.end('[{"task_id": 1, "description": "walk dog"}]}')
}

function index(res) {
    res.end('{"name": "todo-server"}')
}

server.listen(PORT, HOSTNAME, () => {
    console.log('Server listening on', server.address())
})