/**
 * Kicks off less and compiles any stylesheets
 * used in the browser distributed version of less
 * to kick-start less using the browser api
 */
/*global window, document */

// shim Promise if required
require('promise/polyfill.js');

var options = window.less || {};
require("./add-default-options")(window, options);

var less = module.exports = require("./index")(window, options);

window.less = less;

var css, head, style;

// Always restore page visibility
function resolveOrReject(data) {
    if (data.filename) {
        console.warn(data);
    }
    if (!options.async) {
        head.removeChild(style);
    }
}

if (options.onReady) {
    if (/!watch/.test(window.location.hash)) {
        less.watch();
    }
    // Simulate synchronous stylesheet loading by blocking page rendering
    if (!options.async) {
        css = 'body { display: none !important }';
        head = document.head || document.getElementsByTagName('head')[0];
        style = document.createElement('style');

        style.type = 'text/css';
        if (style.styleSheet) {
            style.styleSheet.cssText = css;
        } else {
            style.appendChild(document.createTextNode(css));
        }

        head.appendChild(style);
    }
    less.registerStylesheetsImmediately();
    less.pageLoadFinished = less.refresh(less.env === 'development').then(resolveOrReject, resolveOrReject);
}