/**
 * 采集系统的工具库
 */

//flash监测
exports.flashChecker = function() {
    var hasFlash = 0; //是否安装了flash
    var flashVersion = 0; //flash版本
    var isIE = /*@cc_on!@*/ 0; //是否IE浏览器
    var swf = null;
    if (isIE) {
        swf = new ActiveXObject("ShockwaveFlash.ShockwaveFlash");
        if (swf) {
            hasFlash = 1;
            flashVersion = swf.GetVariable("$version");
        }
    } else {
        if (navigator.plugins && navigator.plugins.length > 0) {
            swf = navigator.plugins["Shockwave Flash"];
            if (swf) {
                hasFlash = 1;
                flashVersion = swf.description.replace("Shockwave Flash", '');
            }
        }
    }
    return {
        f: hasFlash,
        v: flashVersion
    };
};

//hash算法
exports.Hash = function(str) {
    var hash = 1,
        charCode = 0,
        idx;
    if (str) {
        hash = 0;
        for (idx = str.length - 1; idx >= 0; idx--) {
            charCode = str.charCodeAt(idx);
            hash = (hash << 6 & 268435455) + charCode + (charCode << 14);
            charCode = hash & 266338304;
            if (charCode !== 0) {
                hash = hash ^ charCode >> 21;
            }
        }
    }
    return hash;
};

//生成随机数
exports.Random = function() {
    return Math.round(Math.random() * 2147483647);
};

//hash客户端信息
exports.hashClientInfo = function() {
    var navigator = window.navigator;
    var history_length = window.history.length;
    var arr = [
        navigator.appName,
        navigator.version,
        navigator.language,
        navigator.platform,
        navigator.userAgent,
        navigator.javaEnabled(),
        window.screen,
        window.screen.colorDepth, (window.document.cookie ? window.document.cookie : ""), (window.document.referrer ? window.document.referrer : "")
    ];

    navigator = arr.join('');

    for (var len = navigator.length; history_length > 0;) {
        navigator += history_length-- ^ len++;
    }
    return exports.Hash(navigator);
};

//浅层合并对象
exports.merge = function(obj1, obj2) {
    var ret = {};
    for (var attr in obj1) {
        ret[attr] = obj1[attr];
    }

    for (var attr2 in obj2) {
        ret[attr2] = obj2[attr2];
    }
    return ret;
};

//生成URL键值对
exports.genParam = function(obj) {
    var arr = [];
    for (var key in obj) {
        arr.push(key + '=' + obj[key]);
    }
    return arr.join('&');
};

//除去字符串前后的空格
exports.trim = function(text) {
    if (String.prototype.trim) {
        return text === null ? "" : String.prototype.trim.call(text);
    } else {
        var trimLeft = /^\s+/;
        var trimRight = /\s+$/;
        var ret = '';
        if (text) {
            ret = text.toString().replace(trimLeft, "");
            ret = ret.replace(trimRight, "");
            return ret;
        }
    }
};

//获取地理位置信息
exports.getGeo = function(callback) {
    if (window.navigator.geolocation) {
        var options = {
            enableHighAccuracy: true,
        };
        window.navigator.geolocation.getCurrentPosition(handleSuccess, handleError, options);
    } else {
        callback(false);
    }

    function handleSuccess(position) {
        // 获取到当前位置经纬度  本例中是chrome浏览器取到的是google地图中的经纬度
        var lng = position.coords.longitude;
        var lat = position.coords.latitude;
        callback(lat, lng);
    }

    function handleError(error) {
        callback(false);
    }
};

exports.queryString = function() {
    var vars = {},
        hash,
        i;
    var hashes = window.location.search.slice(1).split('&');

    for (i = 0; i < hashes.length; i++) {
        hash = hashes[i].split('=');
        vars[hash[0]] = hash[1];
    }
    return vars;
};

exports.getChannel = function() {
    function cookie(name) {
      var cookies = document.cookie,
        cookieVal;

      if (cookies) {
        cookies = cookies.split(';');
        cookies.forEach(function(c) {
          if (c.indexOf(name) > -1) {
            cookieVal = decodeURIComponent($.trim(c.replace(name + '=', '')));
            return;
          }
        });
      }

      return cookieVal;
    }

    return {
      boys: 1,
      girls: 2,
      kids: 3,
      lifestyle: 4
    }[cookie('_Channel')];
}

var _getAppVersionByUa = function() {
    var vars = navigator.userAgent.split(';') || [];
    for (var i = 0; i < vars.length; i++) {
        if (vars[i].indexOf('app_version') > -1) {
            return vars[i].split('=')[1];
        }
    }
}

exports.getAppVersion = function() {
    var appVer = window.qs.app_version || window.qs.appVersion;
    if (!appVer) {
        appVer = _getAppVersionByUa();
    }
    return appVer;
}