/**
 * MailArchiver is an application that provides services for storing and managing e-mail messages through a Web Services SOAP interface.
 * Copyright (C) 2012  Marcio Andre Scholl Levien and Fernando Alberto Reuter Wendt and Jose Ronaldo Nogueira Fonseca Junior
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/******************************************************************************\
*
*  This product was developed by
*
*        SERVIÇO FEDERAL DE PROCESSAMENTO DE DADOS (SERPRO),
*
*  a government company established under Brazilian law (5.615/70),
*  at Department of Development of Porto Alegre.
*
\******************************************************************************/

package serpro.mailarchiver.domain.metaarchive;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import javax.jdo.JDOHelper;
import javax.jdo.annotations.NotPersistent;
import javax.jdo.annotations.PersistenceCapable;

import serpro.mailarchiver.util.Charsets;
import serpro.mailarchiver.util.Logger;

@PersistenceCapable
public class Multipart
    extends Body
{
    @NotPersistent
    private static final Logger log = Logger.getLocalLogger();

    //**** P E R S I S T E N T ****
    private String preamble;
    private String epilogue;
    private ArrayList<BodyPart> bodyParts = new ArrayList<BodyPart>();
    //*****************************

    public final String getPreamble() {
        return preamble;
    }

    public final void setPreamble(String preamble) {
        if(preamble.length() > 1000) {
            preamble = preamble.substring(0, 1000);
            log.error("Multipart preamble is too long and has been truncated to 1000 characters");
        }
        this.preamble = preamble;
    }

    public final void setPreambleStream(InputStream is) {
        setPreamble(readStream(is));
    }

    public final String getEpilogue() {
        return epilogue;
    }

    public final void setEpilogue(String epilogue) {
        if(epilogue.length() > 1000) {
            epilogue = epilogue.substring(0, 1000);
            log.error("Multipart epilogue is too long and has been truncated to 1000 characters");
        }
        this.epilogue = epilogue;
    }

    public final void setEpilogueStream(InputStream is) {
        setEpilogue(readStream(is));
    }

    //--------------------------------------------------------------------------
    public final List<BodyPart> getBodyParts() {
        return Collections.unmodifiableList(bodyParts);
    }

    public final int indexOf(BodyPart bodyPart) {
        return bodyParts.indexOf(bodyPart);
    }

    public final void addBodyPart(BodyPart bodyPart) {
        if(bodyPart != null) {
            bodyPart.setComposite(this);
        }
    }

    final void internal_addBodyPart(BodyPart bodyPart) {
        bodyParts.add(bodyPart);
    }

    public final void removeBodyPart(BodyPart bodyPart) {
        if((bodyPart != null) && (bodyPart.getComposite() == this)) {
            bodyPart.setComposite(null);
        }
    }

    final void internal_removeBodyPart(BodyPart bodyPart) {
        bodyParts.remove(bodyPart);
    }

    //--------------------------------------------------------------------------
    @Override
    final void dumpTree(StringBuilder sb, String pad) {
        int size = bodyParts.size();
        sb.append(toString(pad + ((size > 0) ? "|   " : "    ")));
        for(int i = 0; i < size; i++) {
            sb.append("\n")
              .append(pad).append("|\n")
              .append(pad).append("+---");
            if(i < (size - 1)) {
                bodyParts.get(i).dumpTree(sb, pad + "|   ");
            }
            else {
                bodyParts.get(i).dumpTree(sb, pad + "    ");
            }
        }
    }

    @Override
    final String toString(String pad) {
        return String.format(
                "Multipart%n"
              + "%1$sjdoState: %2$s%n"
              + "%1$soid: %3$s%n"
              + "%1$shash: %4$x%n"
              + "%1$spreamble: %5$s%n"
              + "%1$sepilogue: %6$s"
              , pad
              , JDOHelper.getObjectState(this)
              , getOid()
              , hashCode()
              , getPreamble()
              , getEpilogue());
    }

    //--------------------------------------------------------------------------
    private String readStream(InputStream is) {
        StringBuilder sb = new StringBuilder();
        BufferedReader reader = null;
        try {
            reader = new BufferedReader(new InputStreamReader(is, Charsets.Windows_1252));
            char[] cbuf = new char[1024];
            int len;
            while((len = reader.read(cbuf)) > 0) {
                sb.append(cbuf, 0, len);
            }
        }
        catch(IOException ex) {
            //TODO
        }
        return sb.toString();
    }
}