// ==UserScript==
// @name         Steam Gems-to-Price Helper
// @namespace    http://nota.moe/
// @version      0.4
// @description  处理垃圾库存的好帮手 ╰(￣▽￣)╭
// @author       NotaStudio
// @match        *://steamcommunity.com/*/inventory/*
// @grant        GM_info
// @grant        GM_setValue
// @grant        GM_getValue
// @run-at       document-end
// @license      GPLv3
// @downloadURL none
// ==/UserScript==

/* 
 * ChangeLog
 * 20161224 0.4
 * 添加初始设置
 * 添加手动设置货币单位功能
 * 修复了快速点击物品时同时显示多个价格的 bug
 * 降低了请求宝珠价格的频率,可能会有微弱的性能提升(或性能下降 o(≧v≦)o~~ )
 * 圣诞快乐~
 * 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($) {
    const ver = GM_info.script.version,
        dateVer = '2016.12.24';

    console.log(`Steam Gems-to-Price Helper ${ver}\nCreated by Nota\n${dateVer}`);

    let gemsCount,
        gemsPrice,
        gemsValue,
        valueSpan,
        localAmountToken;

    let currency = {
        "USD": 1,
        "GBP": 2,
        "EUR": 3,
        "CHF": 4,
        "RUB": 5,
        "PLN": 6,
        "BRL": 7,
        "JPY": 8,
        "NOK": 9,
        "IDR": 10,
        "MYR": 11,
        "PHP": 12,
        "SGD": 13,
        "THB": 14,
        "VND": 15,
        "KRW": 16,
        "TRY": 17,
        "UAH": 18,
        "MXN": 19,
        "CAD": 20,
        "AUD": 21,
        "NZD": 22,
        "CNY": 23,
        "INR": 24,
        "CLP": 25,
        "PEN": 26,
        "COP": 27,
        "ZAR": 28,
        "HKD": 29,
        "TWD": 30,
        "SAR": 31,
        "AED": 32
    };

    let setup = (init) => {
        let initTips = [`Steam Gems-to-Price Helper 已升级到 ${ver} 版本! 请进行初始设置.<br><br>`, `<br><br> 以后, 您可以随时按下 Alt+G 更改本页设置.`],
            form = `<form style="font-size: 16px;line-height: 25px;text-align: center;" class="currencyForm"><b>我的币种代码是</b><select class="sg2ph_select" style="font-weight: bold;"></select><br><i>不支持符号写在数字后方的货币单位,如欧元</i><br><i>不支持符号大于一位的货币单位,如港币</i></form>`;
        if (init) form = initTips[0] + form + initTips[1];
        ShowAlertDialog('设置 Steam Gems-to-Price Helper 币种', form);
        let nowID = GM_getValue('currencyId',23);
        for (let c in currency) {
            let opt = $(`<option value="${currency[c]}">${c}</option>`);
            if (currency[c] == nowID) opt.attr('selected', 'selected');
            opt.appendTo($('.sg2ph_select'));
        }
        let realButton = $('.newmodal:not(#market_sell_dialog) .btn_grey_white_innerfade');
        realButton.css('visibility', 'hidden');
        let overrideButton = $(`<div class="btn_green_white_innerfade btn_medium sg2ph_button"><span>确定(将会刷新页面)</span></div>`);
        overrideButton.insertAfter(realButton);
        overrideButton.on('click', (() => {
        	GM_setValue('currencyId',$('.sg2ph_select').val());
        	GM_setValue('currentVersion',ver);
            realButton.click();
            location.reload();
        })); // Steam 提供的模态窗口不支持回调函数,所以小小地 hack 了一下,用自定义的确认按钮替换掉原来的
    };

    if (GM_getValue('currentVersion') !== ver) setup(true); // 初始设置

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

    let showValue = (xhr) => {
        gemsCount = Number.parseFloat(xhr.responseJSON.goo_value); // 获取当前物品可分解的宝珠数量
        gemsValue = (gemsPrice / 1000 * gemsCount).toFixed(2);
        valueSpan = $('span.item_scrap_value:visible')[0]; // span.item_scrap_value 会对应两个 SPAN 元素,其中可见者则为当前宝珠价值
        valueSpan.innerHTML += `<span style="color: #FF0;cursor: help;" class="sg2ph_valueBox" title="价格显示错误?按 Alt+G 修改设置!">&nbsp;&nbsp;&nbsp;&nbsp;约为${localAmountToken} ${gemsValue}</span>`;
    };

    let ajaxHandler = (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((() => (showValue(xhr))), 100);
            $('.sg2ph_valueBox').remove();
        }
    };

    let refreshPrice = () => {
        let apiUrl = `https://steamcommunity.com/market/priceoverview/?appid=753&currency=${GM_getValue('currencyId',1)}&market_hash_name=753-Sack%20of%20Gems`,
            xhr = new XMLHttpRequest(),
            data;

        xhr.open('GET', apiUrl, false);
        xhr.send();
        data = JSON.parse(xhr.responseText);
        localAmountToken = data.lowest_price.slice(0, 1);
        gemsPrice = parseAmount(data.lowest_price); // 获取当前"一袋宝珠"价格

        setTimeout(refreshPrice, 45000);
    };

    let keyHandler = (e) => {
    	if (e.keyCode == 71 && e.altKey) setup(false); // 同时按下 Alt+G
    };

    refreshPrice();
    $(document).keydown(keyHandler);
    $(document).ajaxComplete(ajaxHandler);

})(jQuery);