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package hudson.scm;

import com.mks.api.response.APIException;
import com.mks.api.response.Response;
import com.mks.api.response.WorkItemIterator;
import com.mks.api.response.InterruptedException;

public class ExceptionHandler 
{
	// Private variables to provide diagnostics on the exception
	private String message;
	private String command;
	private int exitCode;
	
	/**
	 * Constructor requires a single APIException to debug
	 * @param ex APIException 
	 */
	public ExceptionHandler(APIException ex) 
	{
		
		// API Exceptions can be nested.  Hence we will need to recurse the 
		// exception hierarchy to dig for a conclusive message
        Response response = ex.getResponse();

        // Print the stack trace to standard out for debugging purposes
        ex.printStackTrace();
        
		// The API failed to execute the command (i.e. a real API error)
		if( null == response) 
		{			
			message = ex.getMessage();
			command = new java.lang.String();
			//exitCode = Integer.parseInt(ex.getExceptionId());
			exitCode = -1;
		}
		else
		{
			command = response.getCommandString();
			try
			{
				exitCode = response.getExitCode();
			}
			catch(InterruptedException ie)
			{
				// Just print out the stack trace
				ie.printStackTrace();
				exitCode = -1;
			}
			WorkItemIterator wit = response.getWorkItems();
			// In the event there is a problem with one of the command's elements
			// we have to dig deeper into the exception...
			try
			{
				while(wit.hasNext()){ wit.next(); }
				// If we got here then just extract the message
				if(ex.getMessage() != null) 
				{
					message = ex.getMessage();
				}				
			}
			catch(APIException ae)
			{
				// This message will be the real reason for the exception
				String curMessage = ae.getMessage();
				if(curMessage != null)
				{
					message = curMessage;
				}
                ae.printStackTrace();
			}
		}		
	}
	
	/**
	 * Returns the Message obtained from the APIException
	 * @return message APIException String
	 */
	public String getMessage()
	{
		return message;
	}
	
	/**
	 * Returns the executed command that caused the exception
	 * @return command Complete CLI Command String
	 */
	public String getCommand()
	{
		return command;
	}
	
	/**
	 * Returns the exit codes associated with executing the command
	 * @return exitCode API/CLI Exit Code
	 */
	public int getExitCode()
	{
		return exitCode;
	}
}