package com.temp.client.foundation.support.useragent;


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

/**
 * This class provides extended support over the built in GWT User Agent code
 *
 * @author georgs
 */
public class UserAgent {
    /**
     * Specific User Agents:
     */
    public static final String FIREFOX = "Firefox";
    public static final String SAFARI = "Safari";
    public static final String CHROME = "Chrome";
    public static final String OPERA = "Opera";

    /**
     * Unlike the others above, since IE is so "variable" from version to
     * version, the "Specific" is made from the the IE_PREFIX and the specific
     * version number (e.g. IE6, IE7, IE8, IE9, ...).
     */
    public static final String IE_PREFIX = "IE";

    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 mSpecific;

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

    protected UserAgent(BrowserFamily pFamily, String pSpecific) {
        mFamily = pFamily;
        mSpecific = pSpecific;
        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 getSpecific() {
        return mSpecific;
    }

    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(mSpecific);
        sb.append(" '").append(getBrowserUserAgent()).append("'");
        return sb.toString();
    }
}