/*****************************************************************************
 * Copyright (C) The Apache Software Foundation. All rights reserved.        *
 * ------------------------------------------------------------------------- *
 * This software is published under the terms of the Apache Software License *
 * version 1.1, a copy of which has been included with this distribution in  *
 * the LICENSE file.                                                         *
 *****************************************************************************/

package org.apache.batik.test;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.PrintWriter;
import java.io.OutputStreamWriter;

/**
 * A simple implementation of the <tt>TestReportProcessor</tt> interface
 * that prints out the <tt>TestReport</tt> to the standard output.
 *
 * @author <a href="mailto:vhardy@apache.org">Vincent Hardy</a>
 * @version $Id$
 */
public class SimpleTestReportProcessor implements TestReportProcessor {
    /**
     * Message keys
     */
    public static final String MESSAGES_TEST_SUITE_STATUS_TEST_PASSED
        = "SimpleTestReportProcessor.messages.test.suite.status.testPassed";

    public static final String MESSAGES_TEST_SUITE_STATUS_TEST_FAILED
        = "SimpleTestReportProcessor.messages.test.suite.status.testFailed";

    public static final String MESSAGES_TEST_SUITE_STATUS
        = "SimpleTestReportProcessor.messages.test.suite.status";

    public static final String MESSAGES_TEST_SUITE_ERROR_CODE
        = "SimpleTestReportProcessor.messages.test.suite.error.code";

    /**
     * Default output writer
     */
    private PrintWriter printWriter;

    /**
     * Sets the <tt>PrintWriter</tt> this processor should use
     */
    public void setPrintWriter(PrintWriter printWriter){
        this.printWriter = printWriter;
    }

    /**
     * Recursively prints out the entries of the input 
     * report and its children reports, if any.
     */
    public void processReport(TestReport report)
        throws TestException{
        try{
            PrintWriter out = printWriter;
            if(printWriter == null){
                out = new PrintWriter(new OutputStreamWriter(System.out));
            }
            processReport(report, "", out);
            out.flush();
        }catch(Exception e){
            StringWriter sw = new StringWriter();
            PrintWriter pw = new PrintWriter(sw);
            e.printStackTrace(pw);
            throw new TestException(INTERNAL_ERROR,
                                    new Object[] { e.getClass().getName(),
                                                   e.getMessage(),
                                                   sw.toString() },
                                    e);
        }
    }

    /**
     * Prints out the input report, prefixing all output
     * with the input string
     */
    public void processReport(TestReport report, String prefix, PrintWriter out){
        String status = report.hasPassed() 
            ? Messages.formatMessage(MESSAGES_TEST_SUITE_STATUS_TEST_PASSED, null)
            : Messages.formatMessage(MESSAGES_TEST_SUITE_STATUS_TEST_FAILED, null);

        out.println(Messages.formatMessage(MESSAGES_TEST_SUITE_STATUS,
                                                  new Object[]{ report.getTest().getName(),
                                                                status }));

        if(!report.hasPassed()){
            out.println(Messages.formatMessage(MESSAGES_TEST_SUITE_ERROR_CODE, 
                                                      new Object[]{report.getErrorCode()}));
        }
        
        TestReport.Entry[] entries = report.getDescription();
        int n = entries != null ? entries.length : 0;
        for(int i=0; i<n; i++){
            out.print(prefix + entries[i].getKey() + " : " );
            printValue(entries[i].getValue(), prefix + "    ", out);
        }
    }

    /**
     * Prints out the input value depending on its
     * type.
     */
    protected void printValue(Object value, String prefix, PrintWriter out){
        if(!(value instanceof TestReport)){
            out.println(value);
        }
        else{
            out.println();
            processReport((TestReport)value, prefix, out);
        }
    }
}