// Load #1, load as little as possible because we are in a race to get the loading screen up.
define([
    '/bower_components/nthen/index.js',
    '/api/config',
    '/common/dom-ready.js',
    '/common/requireconfig.js',
    '/common/sframe-common-outer.js'
], function (nThen, ApiConfig, DomReady, RequireConfig, SFCommonO) {
    var requireConfig = RequireConfig();

    var hash, href;
    nThen(function (waitFor) {
        DomReady.onReady(waitFor());
    }).nThen(function (waitFor) {
        var req = {
            cfg: requireConfig,
            req: [ '/common/loading.js' ],
            pfx: window.location.origin
        };
        window.rc = requireConfig;
        window.apiconf = ApiConfig;

        // Hidden hash
        hash = window.location.hash;
        href = window.location.href;
        if (window.history && window.history.replaceState) {
            window.history.replaceState({}, window.document.title, '#');
        }

        document.getElementById('sbox-iframe').setAttribute('src',
            ApiConfig.httpSafeOrigin + window.location.pathname + 'inner.html?' +
                requireConfig.urlArgs + '#' + encodeURIComponent(JSON.stringify(req)));

        // This is a cheap trick to avoid loading sframe-channel in parallel with the
        // loading screen setup.
        var done = waitFor();
        var onMsg = function (msg) {
            var data = JSON.parse(msg.data);
            if (data.q !== 'READY') { return; }
            window.removeEventListener('message', onMsg);
            var _done = done;
            done = function () { };
            _done();
        };
        window.addEventListener('message', onMsg);
    }).nThen(function (/*waitFor*/) {
        SFCommonO.start({
            hash: hash,
            href: href,
            useCreationScreen: true,
            messaging: true
        });
    });
});