const express = require('express');
const path = require('path');
const url = require('url');
const fs = require('fs');
const bodyParser = require('body-parser');
const morgan = require('morgan');
const multiparty = require('multiparty');

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

const app = express();

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended: false}));
app.use(morgan('dev'));

app.get('/api/folder/:id/files', function(req, res) {

  const data = {
    items: db,
  };

  res.status(200).json(data);
});

app.post('/api/register', function(req, res, next) {
  const form = new multiparty.Form();
  form.parse(req, function(err, fields, files) {
    Object.keys(fields).forEach(function(name) {
      console.log('got field named ' + name + ' ' + fields[name]);
    });

    Object.keys(files).forEach(function(name) {
      console.log('got file named ' + name);
    });

    console.log('Registration completed!');
    res.status(403).send('Registration completed!');
  });
});

app.get('/', function(req, res) {
  const filePath = path.join(process.cwd(), 'index.html');
  res.sendFile(filePath);
});

app.get('*', function(req, res) {
  const filename = path.join(process.cwd(), url.parse(req.url).pathname);

  if (isDirectory(filename)) {
    // if the url doesn't end with a slash, we need to redirect
    if (req.url.charAt(req.url.length - 1) !== '/') {
      res.writeHead(302, {'Location': req.url + '/'});
      res.end();
      return;
    }

    const filePath = path.join(filename, 'index.js');
    return res.sendFile(filePath);
  }

  res.sendFile(filename);
});

function isDirectory(path) {
  try {
    const stat = fs.lstatSync(path);
    return stat.isDirectory();
  } catch (e) {
    // lstatSync throws an error if path doesn't exist
    return false;
  }
}

module.exports = app;