/**
 * This task starts a dev server that provides a script loader for OpenLayers
 * and Closure Library and runs rendering tests in SlimerJS.
 */

var fs = require('fs');
var path = require('path');
var spawn = require('child_process').spawn;

var slimerjs = require('slimerjs-edge');

var serve = require('./serve');
var listen = require('./test').listen;


/**
 * Create the debug server and run tests.
 */
serve.createServer(function(err, server) {
  if (err) {
    process.stderr.write(err.message + '\n');
    process.exit(1);
  }

  listen(3001, 3005, server, function(err) {
    if (err) {
      process.stderr.write('Server failed to start: ' + err.message + '\n');
      process.exit(1);
    }

    var address = server.address();
    var url = 'http://' + address.address + ':' + address.port;
    var profile = path.join(__dirname, '../build/slimerjs-profile');
    var args = [
      '-profile',
      profile,
      path.join(__dirname,
          '../test_rendering/test.js'),
      url + '/test_rendering/index.html'
    ];

    var child = spawn(slimerjs.path, args, {stdio: 'inherit'});
    child.on('exit', function(code) {
      // FIXME SlimerJS has a problem with returning the correct return
      // code when using a custom profile, see
      // https://github.com/laurentj/slimerjs/issues/333
      // as a work-around we are currently reading the return code from
      // a file created in the profile directory.
      // if this issue is fixed we should use the npm package 'slimerjs'
      // instead of the nightly build 'slimerjs-edge'.
      var exitstatus = path.join(profile, 'exitstatus');
      fs.readFile(exitstatus, {encoding: 'utf-8'}, function(err, data) {
        if (err) {
          process.stderr.write(
              'Error getting the exit status of SlimerJS' + '\n');
          process.stderr.write(err);
          process.exit(1);
        } else {
          process.exit(data);
        }
      });
    });
  });

});