// This Source Code is in the Public Domain per: http://litesoft.org/License.txt
package org.litesoft.GWT.client;

import org.litesoft.core.*;

import com.google.gwt.core.client.*;

public class UserAgent
{
    private static UserAgent sInstance = null;

    public static UserAgent getInstance()
    {
        if ( sInstance == null )
        {
            sInstance = (UserAgent) GWT.create( UserAgent.class );
        }
        return sInstance;
    }

    private Platform mPlatform;
    private BrowserFamily mFamily;
    protected String mReally;

    protected UserAgent()
    {
        this( BrowserFamily.Other, "" );
    }

    protected UserAgent( BrowserFamily pFamily, String pReally )
    {
        mFamily = pFamily;
        mReally = pReally;
        String zUserAgent = getBrowserUserAgent().toLowerCase();
        if ( zUserAgent.contains( "win" ) )
        {
            mPlatform = Platform.Win;
        }
        else if ( zUserAgent.contains( "mac" ) )
        {
            mPlatform = Platform.Mac;
        }
        else
        {
            mPlatform = Platform.Other;
        }
    }

    public Platform getPlatform()
    {
        return mPlatform;
    }

    public BrowserFamily getFamily()
    {
        return mFamily;
    }

    public String getReally()
    {
        return mReally;
    }

    public boolean isLegacyIE()
    {
        return false;
    }

    public static native String getBrowserUserAgent() /*-{
        return navigator.userAgent;
    }-*/;

    @Override
    public String toString()
    {
        StringBuilder sb = new StringBuilder();
        sb.append( mPlatform );
        sb.append( '-' ).append( mFamily ).append( '-' ).append( mReally );
        sb.append( " '" ).append( getBrowserUserAgent() ).append( "'" );
        return sb.toString();
    }
}