/*
 * © Copyright IBM Corp. 2012-2013
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); 
 * you may not use this file except in compliance with the License. 
 * You may obtain a copy of the License at:
 * 
 * http://www.apache.org/licenses/LICENSE-2.0 
 * 
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an "AS IS" BASIS, 
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 
 * implied. See the License for the specific language governing 
 * permissions and limitations under the License.
 */

package com.ibm.commons.util;

import java.io.PrintStream;

import com.ibm.commons.Platform;
import com.ibm.commons.log.CommonsLogger;

/**
 * Diagnotics helpers.
 * <p>
 * Easy to use log utilities.
 * </p>
 * @ibm-api
 */
public class TDiag {

	/**
     * Method that trace to the console.
	 * This should be avoided unless the messages must actually go to the console
	 * @param msg the message to display
	 * @param params the parameters used to format the message
	 * @ibm-api
	 */
    public static final void console( String msg, Object...params ) {
    	String text = StringUtil.format(msg,params);
    	getOutputStream().println(text);
    }
	/**
     * Method that trace an exception to the console.
	 * This should be avoided unless the messages must actually go to the console
	 * @param ex the exception to trace
	 * @ibm-api
	 */
    public static final void console( Exception ex) {
    	ex.printStackTrace(getOutputStream());
    }
	/**
     * Method that trace an exception to the console.
	 * This should be avoided unless the messages must actually go to the console
	 * @param ex the exception to trace
	 * @param msg the message to display
	 * @param params the parameters used to format the message
	 * @ibm-api
	 */
    public static final void console( Exception ex, String msg, Object...params ) {
    	String text = StringUtil.format(msg,params);
    	getOutputStream().println(text);
    	ex.printStackTrace(getOutputStream());
    }
	
    /**
     * Common synchronization object when tracing to the output stream 
	 * @ibm-api
     */
	public static PrintStream getSyncObject() {
		return System.out;
	}
    	
    /**
     * Check if the common logger is enabled. 
	 * @ibm-api
     */
    public static final void isEnabled() {
    	CommonsLogger.STANDARD.isTraceDebugEnabled();
    }

	
    /**
     * Trace to the common logger. 
	 * @ibm-api
     */
    public static final void trace( String msg, Object...parameters ) {
    	if(CommonsLogger.STANDARD.isTraceDebugEnabled()) {
    		CommonsLogger.STANDARD.traceDebug(msg,parameters);
    	}
    }
    
    public static final void tracep(Object clazz, String methodName, Throwable t, String msg, Object...parameters ) {
        if (CommonsLogger.STANDARD.isTraceDebugEnabled()) {
            CommonsLogger.STANDARD.traceDebugp(clazz, methodName, t, msg, parameters);
        }
    }
    
    public static final void incIndent() {
    	//CommonsLogger.STANDARD.incIndent();
    }
    
    public static final void decIndent() {
    	//CommonsLogger.STANDARD.decIndent();
    }

    /**
     * Trace an exception to the common logger. 
	 * @ibm-api
     */
    public static final void exception( Throwable t ) {
    	if(CommonsLogger.STANDARD.isErrorEnabled()) {
            // note, in domino a stack trace is never displayed
            // so some message should be provided
            String msg = null;
            try{
                msg = t.toString();
            }catch(Throwable loggingProblem){
                // ignore logging problem
            }
            if( null == msg || msg.length() == 0){
                try{
                    msg = t.getClass().getName()+"@????"; //$NON-NLS-1$
                }catch(Throwable problem2){
                    // ignore logging problem
                }
                if( null == msg ){
                    msg = "";
                }
            }
    		CommonsLogger.STANDARD.error(t,msg);
    	}
    }
    public static final void exception( Throwable t, String msg, Object...parameters ) {
    	if(CommonsLogger.STANDARD.isErrorEnabled()) {
    		CommonsLogger.STANDARD.error(t,msg,parameters);
    	}
    }
    
    public static PrintStream getOutputStream() {
    	return Platform.getInstance().getOutputStream();
    }
}