/*
 * Copyright 1999-2004 The Apache Software Foundation.
 * 
 * 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 org.apache.batik.ext.awt.geom;

import java.awt.Rectangle;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.StringTokenizer;

import org.apache.batik.test.AbstractTest;
import org.apache.batik.test.DefaultTestReport;
import org.apache.batik.test.TestReport;
import org.apache.batik.util.Base64Test;


/**
 * This test validates that the text selection API's work properly.
 *
 * @author <a href="mailto:deweese@apache.org">Thomas DeWeese</a>
 * @version $Id$
 */
public class RectListManagerTest extends AbstractTest {

    /**
     * Directory for reference files
     */
    public static final String REFERENCE_DIR
        = "test-references/org/apache/batik/ext/awt/geom/";

    public static final String VARIATION_DIR
        = "variation/";

    public static final String CANDIDATE_DIR
        = "candidate/";


    /**
     * Error when unable to load requested rects file
     * {0} = file
     * {1} = exception
     */
    public static final String ERROR_READING_RECTS
        = "RectListManagerTest.error.reading.rects";

    /**
     * Error when unable to read/open ref URL
     * {0} = URL
     * {1} = exception stack trace.
     */
    public static final String ERROR_CANNOT_READ_REF_URL
        = "RectListManagerTest.error.cannot.read.ref.url";

    /**
     * Result didn't match reference result.
     * {0} = first byte of mismatch
     */
    public static final String ERROR_WRONG_RESULT
        = "RectListManagerTest.error.wrong.result";

    /**
     * No Reference or Variation file to compaire with.
     * {0} = reference url
     */
    public static final String ERROR_NO_REFERENCE
        = "RectListManagerTest.error.no.reference";


    public static final String ENTRY_KEY_ERROR_DESCRIPTION
        = "RectListManagerTest.entry.key.error.description";

    protected URL    rects = null;
    protected URL    ref   = null;
    protected URL    var   = null;
    protected File   can   = null;

    /**
     * Constructor. ref is ignored if action == ROUND.
     * @param rects  The rects file to load
     * @param ref    The reference file.
     */
    public RectListManagerTest(String rects, String ref) {
        this.rects = resolveURL(REFERENCE_DIR+rects);
        this.ref   = resolveURL(REFERENCE_DIR+ref);
        this.var   = resolveURL(REFERENCE_DIR+VARIATION_DIR+ref);
        this.can   = new File(REFERENCE_DIR+CANDIDATE_DIR+ref);
    }

    /**
     * Resolves the input string as follows.
     * + First, the string is interpreted as a file description.
     *   If the file exists, then the file name is turned into
     *   a URL.
     * + Otherwise, the string is supposed to be a URL. If it
     *   is an invalid URL, an IllegalArgumentException is thrown.
     */
    protected URL resolveURL(String url){
        // Is url a file?
        File f = (new File(url)).getAbsoluteFile();
        if(f.getParentFile().exists()){
            try{
                return f.toURL();
            }catch(MalformedURLException e){
                throw new IllegalArgumentException();
            }
        }
        
        // url is not a file. It must be a regular URL...
        try{
            return new URL(url);
        }catch(MalformedURLException e){
            throw new IllegalArgumentException(url);
        }
    }

    /**
     * Returns this Test's name
     */
    public String getName() {
        return rects.toString();
    }


    static final String RECT_PREF         ="rect";
    static final String RLM_PREF          ="rectlistmanger";
    static final String MERGE_PREF        ="merge";
    static final String ADD_PREF          ="add";
    static final String SUBTRACT_PREF     ="subtract";
    static final String CONTAINS_ALL_PREF ="containsall";
    static final String REMOVE_ALL_PREF   ="removeall";
    static final String RETAIN_ALL_PREF   ="retainall";
    static final String PRINT_PREF        ="print";

    /**
     * This method will only throw exceptions if some aspect
     * of the test's internal operation fails.
     */
    public TestReport runImpl() throws Exception {
        DefaultTestReport report = new DefaultTestReport(this);

        int lineNo=0;
        try {
            BufferedReader reader;
            reader = new BufferedReader
                (new InputStreamReader(rects.openStream()));

            // Now write a canidate reference/variation file...
            if (can.exists())
                can.delete();

            FileOutputStream fos = new FileOutputStream(can);
            PrintStream ps = new PrintStream(fos);

            Map rlms = new HashMap();
            RectListManager currRLM = null;
            String          currID  = null;
            String line;
            while ((line = reader.readLine()) != null) {
                lineNo++;
                line = line.toLowerCase();
                StringTokenizer st = new StringTokenizer(line);

                // Check blank line...
                if (!st.hasMoreTokens()) continue;

                // Get first token
                String pref = st.nextToken();

                // Check for comment.
                if (pref.startsWith("#")) continue;

                if        (RECT_PREF.equals(pref)) {
                    if (st.countTokens() != 4) continue;
                    if (currRLM == null) continue;

                    int x = Integer.parseInt(st.nextToken());
                    int y = Integer.parseInt(st.nextToken());
                    int w = Integer.parseInt(st.nextToken());
                    int h = Integer.parseInt(st.nextToken());
                    currRLM.add(new Rectangle(x, y, w, h));
                } 
                else if (RLM_PREF.equals(pref)) {
                    String id = st.nextToken();
                    Object o = rlms.get(id);
                    if (o == null) {
                        o = new RectListManager();
                        rlms.put(id, o);
                    }
                    currRLM = (RectListManager)o;
                    currID  = id;
                } 
                else if (MERGE_PREF.equals(pref)) {
                    if (currRLM == null) continue;
                    int overhead     = Integer.parseInt(st.nextToken());
                    int lineOverhead = Integer.parseInt(st.nextToken());
                    currRLM.mergeRects(overhead, lineOverhead);
                } 
                else if (ADD_PREF.equals(pref)) {
                    if (currRLM == null) continue;
                    String id = st.nextToken();
                    Object o = rlms.get(id);
                    if (o == null) continue;
                    currRLM.add((RectListManager)o);
                } 
                else if (SUBTRACT_PREF.equals(pref)) {
                    if (currRLM == null) continue;
                    String id = st.nextToken();
                    Object o = rlms.get(id);
                    if (o == null) continue;
                    int overhead = Integer.parseInt(st.nextToken());
                    int lineOverhead = Integer.parseInt(st.nextToken());
                    currRLM.subtract((RectListManager)o, 
                                     overhead, lineOverhead);
                }
                else if (CONTAINS_ALL_PREF.equals(pref)) {
                    if (currRLM == null) continue;
                    String id = st.nextToken();
                    Object o = rlms.get(id);
                    if (o == null) continue;
                    RectListManager rlm = (RectListManager)o;
                    ps.println("ID: " + currID + " Sz: " + currRLM.size());
                    
                    if (currRLM.containsAll(rlm)) {
                        ps.println("  Contains all: " + id + 
                                   " Sz: " + rlm.size());
                    } else {
                        ps.println("  Does not contain all: " + id + 
                                   " Sz: " + rlm.size());
                    }
                    ps.println();
                }                
                else if (REMOVE_ALL_PREF.equals(pref)) {
                    if (currRLM == null) continue;
                    String id = st.nextToken();
                    Object o = rlms.get(id);
                    if (o == null) continue;
                    currRLM.removeAll((RectListManager)o);
                }                
                else if (RETAIN_ALL_PREF.equals(pref)) {
                    if (currRLM == null) continue;
                    String id = st.nextToken();
                    Object o = rlms.get(id);
                    if (o == null) continue;
                    currRLM.retainAll((RectListManager)o);
                }                
                else if (PRINT_PREF.equals(pref)) {
                    if (currRLM == null) continue;

                    Iterator i = currRLM.iterator();
                    ps.println("ID: " + currID + " Sz: " + currRLM.size());
                    while (i.hasNext()) {
                        ps.println("  " + i.next());
                    }
                    ps.println();
                }
            }

            ps.close();
            fos.close();
        } catch(Exception e) {
            StringWriter trace = new StringWriter();
            e.printStackTrace(new PrintWriter(trace));
            report.setErrorCode(ERROR_READING_RECTS);
            report.setDescription(new TestReport.Entry[] {
                new TestReport.Entry
                    (Messages.formatMessage(ENTRY_KEY_ERROR_DESCRIPTION, null),
                     Messages.formatMessage
                     (ERROR_READING_RECTS,
                      new String[]{""+lineNo, rects.toString(), 
                                   trace.toString()}))
                    });
            report.setPassed(false);
            return report;
        }

        InputStream refIS = null;
        try {
            refIS = var.openStream();
        } catch(Exception e) { 
            try {
                refIS = ref.openStream();
            } catch(Exception ex) {
                StringWriter trace = new StringWriter();
                e.printStackTrace(new PrintWriter(trace));
                report.setErrorCode(ERROR_CANNOT_READ_REF_URL);
                report.setDescription
                    (new TestReport.Entry[] {
                        new TestReport.Entry
                            (Messages.formatMessage
                             (ENTRY_KEY_ERROR_DESCRIPTION, null),
                             Messages.formatMessage
                             (ERROR_CANNOT_READ_REF_URL,
                              new String[]{ref.toString(), trace.toString()}))
                            });
                report.setPassed(false);
            }
        }

        int mismatch = -2;
        if (refIS != null) {
            InputStream canIS = new FileInputStream(can);
            Checker check = new Checker(canIS, refIS);
            check.start();
            mismatch = check.getMismatch();

        }

        if (mismatch == -1) {
          report.setPassed(true);
          can.delete();
          return report;
        }

        if (mismatch == -2) {
            report.setErrorCode(ERROR_NO_REFERENCE);
            report.setDescription(new TestReport.Entry[] {
                new TestReport.Entry
                    (Messages.formatMessage(ENTRY_KEY_ERROR_DESCRIPTION, null),
                     Messages.formatMessage(ERROR_NO_REFERENCE, 
                                            new String[]{ref.toString()}))
                    });
        } else {
            report.setErrorCode(ERROR_WRONG_RESULT);
            report.setDescription(new TestReport.Entry[] {
                new TestReport.Entry
                    (Messages.formatMessage(ENTRY_KEY_ERROR_DESCRIPTION, null),
                     Messages.formatMessage(ERROR_WRONG_RESULT, 
                                            new String[]{""+mismatch}))
                    });
        }
        report.setPassed(false);

        return report;
    }

    public static class Checker extends Thread {
        int mismatch = -2;
        InputStream is1, is2;
        public Checker(InputStream is1, InputStream is2) {
            this.is1 = is1;
            this.is2 = is2;
        }
        public int getMismatch() {
            while (true) {
                try {
                    this.join();
                    break;
                } catch (InterruptedException ie) { }
            }

            return mismatch;
        }
        public void run() {
            mismatch = Base64Test.compareStreams (is1, is2, true);
        }
    }
}