/*
 *                 Sun Public License Notice
 *
 * The contents of this file are subject to the Sun Public License
 * Version 1.0 (the "License"). You may not use this file except in
 * compliance with the License. A copy of the License is available at
 * http://www.sun.com/
 *
 * The Original Code is NetBeans. The Initial Developer of the Original
 * Code is Sun Microsystems, Inc. Portions Copyright 1997-2000 Sun
 * Microsystems, Inc. All Rights Reserved.
 */

package org.netbeans.lib.cvsclient.command.annotate;

import java.io.*;
import java.util.*;

import org.netbeans.lib.cvsclient.command.*;

/**
 * Describes annotate information for  a file. This is the result of doing a
 * cvs annotate command. The fields in instances of this object are populated
 * by response handlers.
 * @author  Milos Kleint
 */
public class AnnotateInformation extends FileInfoContainer {
    /**
     * The file, associated with thiz.
     */
    private File file;

    /**
     * List of lines stored here.
     */
    private List linesList;

    private Iterator iterator;

    private File tempFile;
    
    private File tempDir;

    private BufferedOutputStream tempOutStream;

    public AnnotateInformation() {
        this.tempDir = null;
    }

    public AnnotateInformation(File tempDir) {
        this.tempDir = tempDir;
    }

    /**
     * Getter for property file.
     * @return Value of property file.
     */
    public File getFile() {
        return file;
    }

    /**
     * Setter for property file.
     * @param file New value of property file.
     */
    public void setFile(File file) {
        this.file = file;
    }

    /**
     * Return a string representation of this object. Useful for debugging.
     */
    public String toString() {
        StringBuffer buf = new StringBuffer(30);
        buf.append("\nFile: " + ((file != null)?file.getAbsolutePath():"null")); //NOI18N
        return buf.toString();
    }

    public AnnotateLine createAnnotateLine() {
        return new AnnotateLine();
    }

    public void addLine(AnnotateLine line) {
        linesList.add(line);
    }

    public AnnotateLine getFirstLine() {
        if (linesList == null) {
            linesList = createLinesList();
        }
        iterator = linesList.iterator();
        return getNextLine();
    }

    public AnnotateLine getNextLine() {
        if (iterator == null) {
            return null;
        }
        if (!iterator.hasNext()) {
            return null;
        }
        return (AnnotateLine)iterator.next();
    }

    /**
     * Adds the specified line to the temporary file.
     */
    protected void addToTempFile(String line) throws IOException {
        if (tempOutStream == null) {
            try {
                tempFile = File.createTempFile("ann", ".cvs", tempDir); //NOI18N
                tempFile.deleteOnExit();
                tempOutStream = new BufferedOutputStream(
                        new FileOutputStream(tempFile));
            }
            catch (IOException ex) {
                // TODO
            }
        }
        tempOutStream.write(line.getBytes());
        tempOutStream.write('\n');
    }

    protected void closeTempFile() throws IOException {
        if (tempOutStream == null) {
            return;
        }
        try {
            tempOutStream.flush();
        } finally {
            tempOutStream.close();
        }
    }

    public File getTempFile() {
        return tempFile;
    }

    private List createLinesList() {
        List toReturn = new LinkedList();
        BufferedReader reader = null;
        if (tempFile == null) {
            return toReturn;
        }
        try {
            reader = new BufferedReader(new FileReader(tempFile));
            String line = reader.readLine();
            int lineNum = 1;
            while (line != null) {
                AnnotateLine annLine = AnnotateBuilder.processLine(line);
                if (annLine != null) {
                    annLine.setLineNum(lineNum);
                    toReturn.add(annLine);
                    lineNum++;
                }
                line = reader.readLine();
            }
        }
        catch (IOException exc) {
        }
        finally {
            try {
                if (reader != null) {
                    reader.close();
                }
            }
            catch (IOException ex2) {
            }
        }
        return toReturn;
    }

}