/* global __dirname */
/* jshint strict:false */
"use strict";
var express       = require('express');
var bodyParser    = require('body-parser');
var slug          = require('slug');
var beautify      = require("json-beautify");
var _             = require('lodash');
var path          = require('path');
var Mustache      = require('mustache');
var app           = express();
var fs            = require('fs');
var Promise       = require('bluebird'); Promise.promisifyAll(fs);
var sandboxTpml   = fs.readFileSync(__dirname + '/html/template.mustache.html').toString();
var ExampleStore  = require('./lib/ExampleStore');
var exStore       = new ExampleStore(__dirname + '/exemples');
var {
  readFileAsync,
  readFilesAsync
}                 = require('./lib/fsio');
var {
  getIndexBare,
  getIndexRepo,
  getIndexExample
}                 = require('./lib/indexHandlers')(exStore);


/**
 * Initialize example store
 */
exStore.init();
// .then(() => console.log(exStore.getMenu()));


/**
 * Initialize Express app: root folder as static, body parsers
 */
app.use(express.static(__dirname));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));


function addExample(slug, title) {
  examples.push({ slug: slug, title: title });
  return fs.writeFileAsync(examplesJSON, beautify(examples, null, 2, 100));
}

function readConfigJson(exampleSlug) {
  console.log(exampleSlug);
  return require('./exemples/jquery/' + exampleSlug + '/config.json');
}






/**
 * Index page: render with only repo list in menu
 */
app.get('/', getIndexBare);

/**
 * Repo page: render with repo list and selected repo's example list in menu
 */
app.get('/:repoSlug', getIndexRepo);

/**
 * Example page: render with repo list and selected repo's example list in menu,
 * and the editor with the selected example
 */
app.get('/:repoSlug/:exampleSlug', getIndexExample);

app.post('/examples', function(req, res) {
  var title = req.body.title;
  if(! req.body.title) {
    res.status(400).send('Le titre ne peut pas être vide !');
  }
  var existingTitle = _.find(examples, { title: title });
  if(existingTitle) {
    res.status(400).send("L'exemple '" + title + "' existe déjà !");
  }
  var exampleSlug = slug(req.body.title.toLowerCase());
  var targetDir = __dirname + '/exemples/' + exampleSlug;

  fs.mkdirAsync(targetDir)
  .then(() => Promise.map(
    ['contenu.html', 'script.js'], f => fs.writeFileAsync(targetDir + '/' + f, '')
  ))
  .then(files => addExample(exampleSlug, title))
  .then(() => res.json({ slug: exampleSlug, title: title }));
});

app.get('/examples/:slug', function(req, res) {
  const { slug } = req.params;
  const config = readConfigJson(slug);
  const { title, html, js, css, libsCss, libsJs } = config;
  readFileAsync(__dirname + '/exemples/' + slug + '/example.html')
  .then(body =>
    Mustache.render(sandboxTpml, { body, slug, title, js, css, libsCss, libsJs })
  )
  .then(html => res.send(html));
});

app.get('/menu', (rea, res) => {
  res.send(exStore.getMenu());
});

app.get('/list/:repoPath', function(req, res) {
  const { repoPath } = req.params;
  const repo = exStore.getList(repoPath);
  if(! repo) {
    return res.status(404).send('Repo ' + repoPath + ' not found');
  }
  console.log('found repo', repo);
  const data = repo.examples.map(e => (
    { slug: e.slug, title: e.title }
  ));
  res.json(data);
});

app.put('/examples/:slug', function(req, res) {
  var slug = req.params.slug;
  var existing = _.find(examples, { slug: slug });
  if(! existing) {
    res.status(404).send("L'exemple avec l'identifiant '" + slug + "' est introuvable !");
  }
  var targetDir = __dirname + '/exemples/' + slug;
  if(req.body.html) {
    fs.writeFileSync(targetDir + '/contenu.html', req.body.html);
  }
  if(req.body.javascript) {
    fs.writeFileSync(targetDir + '/script.js', req.body.javascript);
  }
  var theDate = new Date();
  console.log(theDate.getHours() + ':' + theDate.getMinutes() + " - Sauvegarde de l'exemple '" + existing.title + " effectuée'");
  res.json({ success: true });
});

module.exports = app;