/**
 * QR码解码
 */
var qrDecode = (function () {

    "use strict";

    var _show = function(text){
        var el = $('#__fehelper_qr_decode__');
        if(!el[0]){
            el = $('<div id="__fehelper_qr_decode__" style="z-index:999999;position: fixed;left:0;top:0;right: 0;bottom: 0;display: none;">' +
                '<div style="position: fixed;left:0;top:0;right: 0;bottom: 0;background: #000;opacity: 0.5;"></div>' +
                '<div style="position: relative;top: 100px;left: ' + ($('body').width() / 2 - 200) + 'px;border:1px solid #000;background:#fff;width:420px;padding:15px;border-radius:5px 5px;box-shadow:2px 2px 5px #000;">' +
                '<div style="margin: 0 0 10px 0;font-size: 14px;font-weight: bold;">二维码解码结果：</div>' +
                '<textarea style="display:block;border-radius:5px 5px;width:398px;border:1px solid #aaa;min-height:80px;resize:none;box-shadow:2px 2px 5px #aaa;padding:10px;font-size:14px;color:#888;"></textarea>' +
                '<div style="margin-top:10px;">' +
                '<span id="__fehelper_qr_msg_" style="float: right;color:#f00;display:none;">复制成功！</span>' +
                '<a id="__fehelper_qr_copy_" style="margin-right:20px;color: #00f;text-decoration: underline" href="#">复制</a>' +
                '<a id="__fehelper_qr_close_" style="margin-top:10px;color: #00f;text-decoration: underline" href="#">关闭</a>' +
                '</div></div>' +
                '</div>').appendTo('body');

            el.find('a#__fehelper_qr_copy_').click(function(e){
                e.preventDefault();

                el.find('textarea').select();
                document.execCommand('Copy');

                el.find('#__fehelper_qr_msg_').show().delay(2000).hide('slow');
            });
            el.find('a#__fehelper_qr_close_').click(function(e){
                e.preventDefault();
                el.hide('slow');
            });
        }

        if(text == 'error decoding QR Code') {
            text = '抱歉，二维码识别失败！';
        }

        el.show('slow').find('textarea').val(text);
    };

    var _init = function () {
        // 在tab创建或者更新时候，监听事件，看看是否有参数传递过来
        chrome.runtime.onMessage.addListener(function (request, sender, callback) {
            if (request.type == MSG_TYPE.QR_DECODE) {
                _show(request.result);
            }
        });

    };

    return {
        init: _init
    };
})();

qrDecode.init();