#!/usr/bin/env node

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

const
fs = require('fs'),
path = require('path'),
url = require('url'),
http = require('http'),
urlparse = require('urlparse'),
express = require('express');

const
assets = require('../lib/static_resources').all,
cachify = require('connect-cachify'),
i18n = require('../lib/i18n.js'),
wsapi = require('../lib/wsapi.js'),
httputils = require('../lib/httputils.js'),
secrets = require('../lib/secrets.js'),
db = require('../lib/db.js'),
config = require('../lib/configuration.js'),
heartbeat = require('../lib/heartbeat.js'),
metrics = require('../lib/metrics.js'),
logger = require('../lib/logging.js').logger,
forward = require('../lib/http_forward').forward,
shutdown = require('../lib/shutdown'),
views = require('../lib/browserid/views.js');

var app = undefined;

app = express.createServer();

logger.info("static starting up");

// Setup health check / heartbeat middleware.
// This is in front of logging on purpose.  see issue #537
heartbeat.setup(app);

// logging!  all requests other than __heartbeat__ are logged
app.use(express.logger({
  format: config.get('express_log_format'),
  stream: {
    write: function(x) {
      logger.info(typeof x === 'string' ? x.trim() : x);
    }
  }
}));

// #2.1 - localization
app.use(i18n.abide({
  supported_languages: config.get('supported_languages'),
  default_lang: config.get('default_lang'),
  debug_lang: config.get('debug_lang'),
  locale_directory: config.get('locale_directory'),
  disable_locale_check: config.get('disable_locale_check')
}));

var statsd_config = config.get('statsd');
if (statsd_config && statsd_config.enabled) {
  logger_statsd = require("connect-logger-statsd");
  app.use(logger_statsd({
    host: statsd_config.hostname || "localhost",
    port: statsd_config.port || 8125,
    prefix: statsd_config.prefix || "browserid.static."
  }));
}
// #4 - prevent framing of everything.  content underneath that needs to be
// framed must explicitly remove the x-frame-options
app.use(function(req, resp, next) {
  resp.setHeader('x-frame-options', 'DENY');
  next();
});

var static_root = path.join(__dirname, "..", "resources", "static");

// #7 - perform response substitution to support local/dev/beta environments
// (specifically, this replaces URLs in responses, e.g. https://browserid.org
//  with https://diresworb.org)
config.performSubstitution(app);

// #9 - handle views for dynamicish content
views.setup(app);

app.use(cachify.setup(assets(config.get('supported_languages')),
        {
          prefix: config.get('cachify_prefix'),
          production: config.get('use_minified_resources'),
          root: static_root,
        }));


// if nothing else has caught this request, serve static files, but ensure
// that proper vary headers are installed to prevent unwanted caching
app.use(function(req, res, next) {
  res.setHeader('Vary', 'Accept-Encoding,Accept-Language');
  next();
});

app.use(express.static(static_root));

var bindTo = config.get('bind_to');
app.listen(bindTo.port, bindTo.host, function() {
  logger.info("running on http://" + app.address().address + ":" + app.address().port);
});