var xlsx = require('node-xlsx');
var fs = require('fs');
var optimist = require('optimist').argv;
var src = optimist.src;
var target = optimist.target;
var json = fs.readFileSync(src).toString();

String.prototype.decodeHTML = function() {
	var map = {
		"gt": ">",
		"nbsp": " ",
		"amp": "&"
		/* , … */
	};
	return this.replace(/&(#(?:x[0-9a-f]+|\d+)|[a-z]+);?/gi, function($0, $1) {
		if ($1[0] === "#") {
			return String.fromCharCode($1[1].toLowerCase() === "x" ? parseInt($1.substr(2), 16) : parseInt($1.substr(1), 10));
		} else {
			return map.hasOwnProperty($1) ? map[$1] : $0;
		}
	});
};

var _GroupMember_Callback = function(data) {
	data = data.data.item;
	var ret = [];
	data.forEach(function(item, index) {
        var nick = item.nick.decodeHTML();
        nick = nick.replace(/[^a-zA-Z0-9_\-\u4e00-\u9fa5]/g,'');
		ret.push([nick, item.uin + '@qq.com']);
	});
	var worksheets = [];
	worksheets.push({
		"name": "sheets",
		"data": ret
	});
	var buffer = xlsx.build({
		worksheets: worksheets
	}); // returns a buffer
	fs.open(target, 'w', function(err, fd) {
		if (err) throw err;
		else {
			fs.write(fd, buffer, 0, buffer.length, null, function() {
				if (err) throw err;
				else {
					fs.close(fd, function() {
						console.log(target+ ' written');
					});
				}
			});
		}
	});
};

eval(json);