// ==UserScript==
// @name         Steam Gems-to-Price Helper
// @namespace    http://nota.moe/
// @version      0.3
// @description  处理垃圾库存的好帮手 ╰(￣▽￣)╭
// @author       NotaStudio
// @match        *://steamcommunity.com/*/inventory/*
// @grant        none
// @run-at       document-end
// @license      GPLv3
// @downloadURL none
// ==/UserScript==

/* 
 * ChangeLog
 * 20161217 0.3
 * 临时修复国区价格显示为美元的 bug
 * 20161217 0.2
 * 修复价格显示为"约为 undefined NaN" 的 bug
 * 20161216 0.1-alpha
 * 初次发布
 */

(function($) {
	console.log('Steam Gems-to-Price Helper 0.3\nCreated by Nota\n2016.12.17');

	let gemsCount,
		gemsPrice,
		gemsValue,
		valueSpan,
		localAmountToken;

	let parseAmount = (amount) => Number.parseFloat(amount.slice(2)); // 去除货币符号和空格

	let getGemsPrice = (xhr) => {
		gemsCount = Number.parseFloat(xhr.responseJSON.goo_value); // 获取当前物品可分解的宝珠数量

		let apiUrl = `https://steamcommunity.com/market/priceoverview/?appid=753&country=CN&currency=23&market_hash_name=753-Sack%20of%20Gems`;
		$.get(apiUrl,((data) => {
			localAmountToken = data.lowest_price.slice(0,1);
			gemsPrice = parseAmount(data.lowest_price); // 获取当前"一袋宝珠"价格
			gemsValue = (gemsPrice / 1000 * gemsCount).toFixed(2);
			valueSpan = $('span.item_scrap_value:visible')[0]; // span.item_scrap_value 会对应两个 SPAN 元素,其中可见者则为当前宝珠价值
			valueSpan.innerHTML += `<span style="color:#FF0">&nbsp;&nbsp;&nbsp;&nbsp;约为${localAmountToken} ${gemsValue}</span>`;
		}));

	};

	let eventHandler = (event, xhr, settings) => {
		if (settings.url.match(/ajaxgetgoovalueforitemtype/)) // Steam 会在点击某一库存物品时进行 3 次 jQuery AJAX 请求.筛选出请求宝珠数量的那一次
			setTimeout((() => (getGemsPrice(xhr))), 250);
	};

	$(document).ajaxComplete(eventHandler);

})(jQuery);