/*
 * Jalview - A Sequence Alignment Editor and Viewer
 * Copyright (C) 2005 AM Waterhouse, J Procter, G Barton, M Clamp, S Searle
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */
package jalview.io;

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

import jalview.datamodel.*;
import jalview.util.*;

public class ClustalFile
    extends AlignFile
{

  public ClustalFile()
  {
  }

  public ClustalFile(String inStr)
  {
    super(inStr);
  }

  public ClustalFile(String inFile, String type)
      throws IOException
  {
    super(inFile, type);
  }

  public void initData()
  {
    super.initData();
  }

  public void parse() throws IOException
  {
    int i = 0;
    boolean flag = false;

    Vector headers = new Vector();
    Hashtable seqhash = new Hashtable();
    StringBuffer tempseq;
    String line, id;
    StringTokenizer str;

    try
    {
      while ( (line = nextLine()) != null)
      {
        if (line.indexOf(" ") != 0)
        {
          str = new StringTokenizer(line, " ");

          if (str.hasMoreTokens())
          {
            id = str.nextToken();

            if (id.equalsIgnoreCase("CLUSTAL"))
            {
              flag = true;
            }
            else
            {
              if (flag)
              {
                if (seqhash.containsKey(id))
                {
                  tempseq = (StringBuffer) seqhash.get(id);
                }
                else
                {
                  tempseq = new StringBuffer();
                  seqhash.put(id, tempseq);
                }

                if (! (headers.contains(id)))
                {
                  headers.addElement(id);
                }

                if (str.hasMoreTokens())
                {
                  tempseq.append(str.nextToken());
                }
              }
            }
          }
          else
            flag = true;
        }
      }
    }
    catch (IOException e)
    {
      System.err.println("Exception parsing clustal file " + e);
      e.printStackTrace();
    }

    if (flag)
    {
      this.noSeqs = headers.size();

      //Add sequences to the hash
      for (i = 0; i < headers.size(); i++)
      {
        if (seqhash.get(headers.elementAt(i)) != null)
        {
          if (maxLength < seqhash.get(headers.elementAt(i)).toString()
              .length())
          {
            maxLength = seqhash.get(headers.elementAt(i)).toString()
                .length();
          }

          Sequence newSeq = parseId(headers.elementAt(i).toString());
          newSeq.setSequence( seqhash.get(headers.elementAt(i).toString()).toString() );

          if (!isValidProteinSequence(newSeq.getSequence()))
          {
              throw new IOException(AppletFormatAdapter.INVALID_CHARACTERS
                                    + " : " + newSeq.getName()
                                    + " : " + invalidCharacter);
          }


          seqs.addElement(newSeq);
        }
        else
        {
          System.err.println(
              "Clustal File Reader: Can't find sequence for " +
              headers.elementAt(i));
        }
      }
    }
  }

  public String print()
  {
    return print(getSeqsAsArray());
  }

  public String print(SequenceI[] s)
  {
    StringBuffer out = new StringBuffer("CLUSTAL\n\n");

    int max = 0;
    int maxid = 0;

    int i = 0;

    while ( (i < s.length) && (s[i] != null))
    {
      String tmp = printId(s[i]);

      if (s[i].getSequence().length() > max)
      {
        max = s[i].getSequence().length();
      }

      if (tmp.length() > maxid)
      {
        maxid = tmp.length();
      }

      i++;
    }

    if (maxid < 15)
    {
      maxid = 15;
    }

    maxid++;

    int len = 60;
    int nochunks = (max / len) + 1;

    for (i = 0; i < nochunks; i++)
    {
      int j = 0;

      while ( (j < s.length) && (s[j] != null))
      {
        out.append(new Format("%-" + maxid + "s").form( printId(s[j]) + " "));

        int start = i * len;
        int end = start + len;

        if ( (end < s[j].getSequence().length()) &&
            (start < s[j].getSequence().length()))
        {
          out.append(s[j].getSequence().substring(start, end));
        }
        else
        {
          if (start < s[j].getSequence().length())
          {
            out.append(s[j].getSequence().substring(start));
          }
        }

        out.append("\n");
        j++;
      }

      out.append("\n");
    }

    return out.toString();
  }
}