const EPlatform = cc.Enum( {
    Unknown           : 0,
    WebBrowser_Mobile : 1,
    WebBrowser_Fixed  : 2,
    Native_Android    : 11,
    Native_IOS        : 12,
    WindowsOrEditor   : 15,
    Other : 999
});

const PlatformName = {
    "0": "Unknown",
    "1": "WebBrowser_Mobile",
    "2": "WebBrowser_Fixed",
    "11": "Native_Android",
    "12": "Native_IOS",
    "15": "WindowsOrEditor",
    "999": "Other",
};

let CMiscHelp = cc.Class({

    statics: {
        instance: null
    },

    ctor: function () {
        this.mPlatform = EPlatform.Unknown;
    },

    getPlatform : function() {
        if ( EPlatform.Unknown !== this.mPlatform ) {
            return this.mPlatform;
        }

        if ( cc.sys.isBrowser ) {

            this.mPlatform = ( cc.sys.OS_ANDROID === cc.sys.os || cc.sys.OS_IOS === cc.sys.os )
                ? EPlatform.WebBrowser_Mobile : EPlatform.WebBrowser_Fixed;
        }
        else {
            if( cc.sys.isNative ) {
                if( cc.sys.isMobile ) {
                    if ( cc.sys.OS_ANDROID === cc.sys.os ) {
                        this.mPlatform = EPlatform.Native_Android;
                    }
                    else if ( cc.sys.OS_IOS === cc.sys.os ) {
                        this.mPlatform = EPlatform.Native_IOS;
                    }
                    else {
                        this.mPlatform = EPlatform.Other;
                    }
                }
                else {
                    this.mPlatform = EPlatform.WindowsOrEditor;
                }
            }
            else {
                this.mPlatform = EPlatform.Other;
            }
        }

        return this.mPlatform;
    },

    /**
     * 获取当前平台名
     * @return {string}
     */
    getPlatformName: function() {
         let pt = this.getPlatform();
         return PlatformName[pt] || PlatformName[0];
    },

    /**
     * 是否浏览器环境
     * @return {boolean}
     */
    isBrowser : function() {
        return this.isMobileBrowser() || this.isWin32WebBrowser();
    },

    /**
     * 是否移动平台的浏览器
     * @return {boolean}
     */
    isMobileBrowser: function() {
        return EPlatform.WebBrowser_Mobile === this.getPlatform();
    },

    /**
     * 是否 win32，Mac等 非移动平台的浏览器
     * @return {boolean}
     */
    isWin32WebBrowser : function () {
        return EPlatform.WebBrowser_Fixed === this.getPlatform();
    },

    isNative : function () {
        return this.isNativeAndroid() || this.isNativeIOS();
    },

    /**
     * 是否 Android 源生环境
     * @return {boolean}
     */
    isNativeAndroid : function() {
        return EPlatform.Native_Android === this.getPlatform();
    },

    /**
     * 是否 IOS 源生环境
     * @return {boolean}
     */
    isNativeIOS : function() {
        return EPlatform.Native_IOS === this.getPlatform();
    },

    /**
     * 是否 Win32，Mac，编辑器 等源生环境
     * @return {boolean}
     */
    isWindowsOrEditor: function() {
        return EPlatform.WindowsOrEditor === this.getPlatform();
    },

    /**
     * @return {boolean}
     */
    isValid : function( target ) {
        return undefined !== target && null !== target;
    },

    /**
     * @return {boolean}
     */
    isValidString : function( targetString ) {
        return undefined !== targetString && null !== targetString && 0 !== targetString['length'];
    },

    /**
     * @return {cc.Node}
     */
    getValidNode : function( node ) {

        if( !node ) {
            return null;
        }

        let realNodeVal = null;

        if( node instanceof cc.Node ) {
            realNodeVal = node;
        }
        else if( node instanceof cc.Component ) {
            realNodeVal = node.node;
        }
        else {
            return null;
        }

        if ( realNodeVal && realNodeVal.isValid ) {
            return realNodeVal;
        }

        return null;
    },

    /**
     * @return {boolean}
     */
    isValidNode( node ) {
        return ( null != this.getValidNode( node ) );
    },


});

CMiscHelp.getInstance = function () {
    if (!CMiscHelp.instance) {
        CMiscHelp.instance = new CMiscHelp();
    }
    return CMiscHelp.instance;
}

module.exports = CMiscHelp;