import { http } from '../net/http.js';

class CssHandler {

constructor() {

this.maxRetries = 0;

}

load(url, callback) {

if (typeof url === 'string') {

url = {

load: url,

original: url

};

}

http.get(url.load, {

retry: this.maxRetries > 0,

maxRetries: this.maxRetries

}, function (err, response) {

if (!err) {

callback(null, response);

} else {

callback("Error loading css resource: " + url.original + " [" + err + "]");

}

});

}

open(url, data) {

return data;

}

patch(asset, assets) {

}

}

/**

* @function

* @name createStyle

* @description Creates a <style> DOM element from a string that contains CSS.

* @param {string} cssString - A string that contains valid CSS.

* @example

* var css = 'body {height: 100;}';

* var style = pc.createStyle(css);

* document.head.appendChild(style);

* @returns {Element} The style DOM element.

*/

function createStyle(cssString) {

const result = document.createElement('style');

result.type = 'text/css';

if (result.styleSheet) {

result.styleSheet.cssText = cssString;

} else {

result.appendChild(document.createTextNode(cssString));

}

return result;

}

export { createStyle, CssHandler };