/*
 * Jalview - A Sequence Alignment Editor and Viewer (2.11.2.2)
 * Copyright (C) 2022 The Jalview Authors
 * 
 * This file is part of Jalview.
 * 
 * Jalview 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 3
 * of the License, or (at your option) any later version.
 *  
 * Jalview 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 Jalview.  If not, see <http://www.gnu.org/licenses/>.
 * The Jalview Authors are detailed in the 'AUTHORS' file.
 */
package jalview.ws.jws1;

import jalview.analysis.AlignSeq;
import jalview.bin.Console;
import jalview.datamodel.Alignment;
import jalview.datamodel.AlignmentI;
import jalview.datamodel.AlignmentOrder;
import jalview.datamodel.AlignmentView;
import jalview.datamodel.HiddenColumns;
import jalview.datamodel.SequenceI;
import jalview.gui.AlignFrame;
import jalview.gui.Desktop;
import jalview.gui.WebserviceInfo;
import jalview.util.MessageManager;
import jalview.ws.AWsJob;
import jalview.ws.JobStateSummary;
import jalview.ws.WSClientI;

import java.util.Hashtable;
import java.util.Vector;

import vamsas.objects.simple.MsaResult;

class MsaWSThread extends JWS1Thread implements WSClientI
{
  boolean submitGaps = false; // pass sequences including gaps to alignment

  // service

  boolean preserveOrder = true; // and always store and recover sequence

  // order

  class MsaWSJob extends WSJob
  {
    // hold special input for this
    vamsas.objects.simple.SequenceSet seqs = new vamsas.objects.simple.SequenceSet();

    /**
     * MsaWSJob
     * 
     * @param jobNum
     *          int
     * @param jobId
     *          String
     */
    public MsaWSJob(int jobNum, SequenceI[] inSeqs)
    {
      this.jobnum = jobNum;
      if (!prepareInput(inSeqs, 2))
      {
        submitted = true;
        subjobComplete = true;
        result = new MsaResult();
        result.setFinished(true);
        result.setStatus(MessageManager.getString("label.job_never_ran"));
      }

    }

    Hashtable SeqNames = new Hashtable();

    Vector emptySeqs = new Vector();

    /**
     * prepare input sequences for MsaWS service
     * 
     * @param seqs
     *          jalview sequences to be prepared
     * @param minlen
     *          minimum number of residues required for this MsaWS service
     * @return true if seqs contains sequences to be submitted to service.
     */
    private boolean prepareInput(SequenceI[] seqs, int minlen)
    {
      int nseqs = 0;
      if (minlen < 0)
      {
        throw new Error(MessageManager.getString(
                "error.implementation_error_minlen_must_be_greater_zero"));
      }
      for (int i = 0; i < seqs.length; i++)
      {
        if (seqs[i].getEnd() - seqs[i].getStart() > minlen - 1)
        {
          nseqs++;
        }
      }
      boolean valid = nseqs > 1; // need at least two seqs
      vamsas.objects.simple.Sequence[] seqarray = (valid)
              ? new vamsas.objects.simple.Sequence[nseqs]
              : null;
      for (int i = 0, n = 0; i < seqs.length; i++)
      {

        String newname = jalview.analysis.SeqsetUtils.unique_name(i); // same
        // for
        // any
        // subjob
        SeqNames.put(newname,
                jalview.analysis.SeqsetUtils.SeqCharacterHash(seqs[i]));
        if (valid && seqs[i].getEnd() - seqs[i].getStart() > minlen - 1)
        {
          seqarray[n] = new vamsas.objects.simple.Sequence();
          seqarray[n].setId(newname);
          seqarray[n++].setSeq((submitGaps) ? seqs[i].getSequenceAsString()
                  : AlignSeq.extractGaps(jalview.util.Comparison.GapChars,
                          seqs[i].getSequenceAsString()));
        }
        else
        {
          String empty = null;
          if (seqs[i].getEnd() >= seqs[i].getStart())
          {
            empty = (submitGaps) ? seqs[i].getSequenceAsString()
                    : AlignSeq.extractGaps(jalview.util.Comparison.GapChars,
                            seqs[i].getSequenceAsString());
          }
          emptySeqs.add(new String[] { newname, empty });
        }
      }
      this.seqs = new vamsas.objects.simple.SequenceSet();
      this.seqs.setSeqs(seqarray);
      return valid;
    }

    /**
     * 
     * @return true if getAlignment will return a valid alignment result.
     */
    @Override
    public boolean hasResults()
    {
      if (subjobComplete && result != null && result.isFinished()
              && ((MsaResult) result).getMsa() != null
              && ((MsaResult) result).getMsa().getSeqs() != null)
      {
        return true;
      }
      return false;
    }

    public Object[] getAlignment()
    {

      if (result != null && result.isFinished())
      {
        SequenceI[] alseqs = null;
        char alseq_gapchar = '-';
        int alseq_l = 0;
        if (((MsaResult) result).getMsa() != null)
        {
          alseqs = getVamsasAlignment(((MsaResult) result).getMsa());
          alseq_gapchar = ((MsaResult) result).getMsa().getGapchar()
                  .charAt(0);
          alseq_l = alseqs.length;
        }
        if (emptySeqs.size() > 0)
        {
          SequenceI[] t_alseqs = new SequenceI[alseq_l + emptySeqs.size()];
          // get width
          int i, w = 0;
          if (alseq_l > 0)
          {
            for (i = 0, w = alseqs[0].getLength(); i < alseq_l; i++)
            {
              if (w < alseqs[i].getLength())
              {
                w = alseqs[i].getLength();
              }
              t_alseqs[i] = alseqs[i];
              alseqs[i] = null;
            }
          }
          // check that aligned width is at least as wide as emptySeqs width.
          int ow = w, nw = w;
          for (i = 0, w = emptySeqs.size(); i < w; i++)
          {
            String[] es = (String[]) emptySeqs.get(i);
            if (es != null && es[1] != null)
            {
              int sw = es[1].length();
              if (nw < sw)
              {
                nw = sw;
              }
            }
          }
          // make a gapped string.
          StringBuffer insbuff = new StringBuffer(w);
          for (i = 0; i < nw; i++)
          {
            insbuff.append(alseq_gapchar);
          }
          if (ow < nw)
          {
            for (i = 0; i < alseq_l; i++)
            {
              int sw = t_alseqs[i].getLength();
              if (nw > sw)
              {
                // pad at end
                alseqs[i].setSequence(t_alseqs[i].getSequenceAsString()
                        + insbuff.substring(0, sw - nw));
              }
            }
          }
          for (i = 0, w = emptySeqs.size(); i < w; i++)
          {
            String[] es = (String[]) emptySeqs.get(i);
            if (es[1] == null)
            {
              t_alseqs[i + alseq_l] = new jalview.datamodel.Sequence(es[0],
                      insbuff.toString(), 1, 0);
            }
            else
            {
              if (es[1].length() < nw)
              {
                t_alseqs[i + alseq_l] = new jalview.datamodel.Sequence(
                        es[0],
                        es[1] + insbuff.substring(0, nw - es[1].length()),
                        1, 1 + es[1].length());
              }
              else
              {
                t_alseqs[i + alseq_l] = new jalview.datamodel.Sequence(
                        es[0], es[1]);
              }
            }
          }
          alseqs = t_alseqs;
        }
        AlignmentOrder msaorder = new AlignmentOrder(alseqs);
        // always recover the order - makes parseResult()'s life easier.
        jalview.analysis.AlignmentSorter.recoverOrder(alseqs);
        // account for any missing sequences
        jalview.analysis.SeqsetUtils.deuniquify(SeqNames, alseqs);
        return new Object[] { alseqs, msaorder };
      }
      return null;
    }

    /**
     * mark subjob as cancelled and set result object appropriatly
     */
    void cancel()
    {
      cancelled = true;
      subjobComplete = true;
      result = null;
    }

    /**
     * 
     * @return boolean true if job can be submitted.
     */
    @Override
    public boolean hasValidInput()
    {
      if (seqs.getSeqs() != null)
      {
        return true;
      }
      return false;
    }
  }

  String alTitle; // name which will be used to form new alignment window.

  AlignmentI dataset; // dataset to which the new alignment will be

  // associated.

  ext.vamsas.MuscleWS server = null;

  /**
   * set basic options for this (group) of Msa jobs
   * 
   * @param subgaps
   *          boolean
   * @param presorder
   *          boolean
   */
  MsaWSThread(ext.vamsas.MuscleWS server, String wsUrl,
          WebserviceInfo wsinfo, jalview.gui.AlignFrame alFrame,
          AlignmentView alview, String wsname, boolean subgaps,
          boolean presorder)
  {
    super(alFrame, wsinfo, alview, wsname, wsUrl);
    this.server = server;
    this.submitGaps = subgaps;
    this.preserveOrder = presorder;
  }

  /**
   * create one or more Msa jobs to align visible seuqences in _msa
   * 
   * @param title
   *          String
   * @param _msa
   *          AlignmentView
   * @param subgaps
   *          boolean
   * @param presorder
   *          boolean
   * @param seqset
   *          Alignment
   */
  MsaWSThread(ext.vamsas.MuscleWS server, String wsUrl,
          WebserviceInfo wsinfo, jalview.gui.AlignFrame alFrame,
          String wsname, String title, AlignmentView _msa, boolean subgaps,
          boolean presorder, AlignmentI seqset)
  {
    this(server, wsUrl, wsinfo, alFrame, _msa, wsname, subgaps, presorder);
    OutputHeader = wsInfo.getProgressText();
    alTitle = title;
    dataset = seqset;

    SequenceI[][] conmsa = _msa.getVisibleContigs('-');
    if (conmsa != null)
    {
      int njobs = conmsa.length;
      jobs = new MsaWSJob[njobs];
      for (int j = 0; j < njobs; j++)
      {
        if (j != 0)
        {
          jobs[j] = new MsaWSJob(wsinfo.addJobPane(), conmsa[j]);
        }
        else
        {
          jobs[j] = new MsaWSJob(0, conmsa[j]);
        }
        if (njobs > 0)
        {
          wsinfo.setProgressName("region " + jobs[j].getJobnum(),
                  jobs[j].getJobnum());
        }
        wsinfo.setProgressText(jobs[j].getJobnum(), OutputHeader);
      }
    }
  }

  @Override
  public boolean isCancellable()
  {
    return true;
  }

  @Override
  public void cancelJob()
  {
    if (!jobComplete && jobs != null)
    {
      boolean cancelled = true;
      for (int job = 0; job < jobs.length; job++)
      {
        if (jobs[job].isSubmitted() && !jobs[job].isSubjobComplete())
        {
          String cancelledMessage = "";
          try
          {
            vamsas.objects.simple.WsJobId cancelledJob = server
                    .cancel(jobs[job].getJobId());
            if (cancelledJob.getStatus() == 2)
            {
              // CANCELLED_JOB
              cancelledMessage = "Job cancelled.";
              ((MsaWSJob) jobs[job]).cancel();
              wsInfo.setStatus(jobs[job].getJobnum(),
                      WebserviceInfo.STATE_CANCELLED_OK);
            }
            else if (cancelledJob.getStatus() == 3)
            {
              // VALID UNSTOPPABLE JOB
              cancelledMessage += "Server cannot cancel this job. just close the window.\n";
              cancelled = false;
              // wsInfo.setStatus(jobs[job].jobnum,
              // WebserviceInfo.STATE_RUNNING);
            }

            if (cancelledJob.getJobId() != null)
            {
              cancelledMessage += ("[" + cancelledJob.getJobId() + "]");
            }

            cancelledMessage += "\n";
          } catch (Exception exc)
          {
            cancelledMessage += ("\nProblems cancelling the job : Exception received...\n"
                    + exc + "\n");
            Console.warn(
                    "Exception whilst cancelling " + jobs[job].getJobId(),
                    exc);
          }
          wsInfo.setProgressText(jobs[job].getJobnum(),
                  OutputHeader + cancelledMessage + "\n");
        }
      }
      if (cancelled)
      {
        wsInfo.setStatus(WebserviceInfo.STATE_CANCELLED_OK);
        jobComplete = true;
      }
      this.interrupt(); // kick thread to update job states.
    }
    else
    {
      if (!jobComplete)
      {
        wsInfo.setProgressText(OutputHeader
                + "Server cannot cancel this job because it has not been submitted properly. just close the window.\n");
      }
    }
  }

  @Override
  public void pollJob(AWsJob job) throws Exception
  {
    ((MsaWSJob) job).result = server.getResult(((MsaWSJob) job).getJobId());
  }

  @Override
  public void StartJob(AWsJob job)
  {
    if (!(job instanceof MsaWSJob))
    {
      throw new Error(MessageManager.formatMessage(
              "error.implementation_error_msawbjob_called", new String[]
              { job.getClass().toString() }));
    }
    MsaWSJob j = (MsaWSJob) job;
    if (j.isSubmitted())
    {
      if (Console.isDebugEnabled())
      {
        Console.debug(
                "Tried to submit an already submitted job " + j.getJobId());
      }
      return;
    }
    if (j.seqs.getSeqs() == null)
    {
      // special case - selection consisted entirely of empty sequences...
      j.setSubmitted(true);
      j.result = new MsaResult();
      j.result.setFinished(true);
      j.result.setStatus(
              MessageManager.getString("label.empty_alignment_job"));
      ((MsaResult) j.result).setMsa(null);
    }
    try
    {
      vamsas.objects.simple.WsJobId jobsubmit = server.align(j.seqs);

      if ((jobsubmit != null) && (jobsubmit.getStatus() == 1))
      {
        j.setJobId(jobsubmit.getJobId());
        j.setSubmitted(true);
        j.setSubjobComplete(false);
        // System.out.println(WsURL + " Job Id '" + jobId + "'");
      }
      else
      {
        if (jobsubmit == null)
        {
          throw new Exception(MessageManager.formatMessage(
                  "exception.web_service_returned_null_try_later",
                  new String[]
                  { WsUrl }));
        }

        throw new Exception(jobsubmit.getJobId());
      }
    } catch (Exception e)
    {
      // TODO: JBPNote catch timeout or other fault types explicitly
      // For unexpected errors
      System.err.println(WebServiceName
              + "Client: Failed to submit the sequences for alignment (probably a server side problem)\n"
              + "When contacting Server:" + WsUrl + "\n" + e.toString()
              + "\n");
      j.setAllowedServerExceptions(0);
      wsInfo.setStatus(WebserviceInfo.STATE_STOPPED_SERVERERROR);
      wsInfo.setStatus(j.getJobnum(),
              WebserviceInfo.STATE_STOPPED_SERVERERROR);
      wsInfo.appendProgressText(j.getJobnum(), MessageManager
              .getString("info.failed_to_submit_sequences_for_alignment"));

      // e.printStackTrace(); // TODO: JBPNote DEBUG
    }
  }

  private jalview.datamodel.Sequence[] getVamsasAlignment(
          vamsas.objects.simple.Alignment valign)
  {
    // TODO: refactor to helper class for vamsas.objects.simple objects
    vamsas.objects.simple.Sequence[] seqs = valign.getSeqs().getSeqs();
    jalview.datamodel.Sequence[] msa = new jalview.datamodel.Sequence[seqs.length];

    for (int i = 0, j = seqs.length; i < j; i++)
    {
      msa[i] = new jalview.datamodel.Sequence(seqs[i].getId(),
              seqs[i].getSeq());
    }

    return msa;
  }

  @Override
  public void parseResult()
  {
    int results = 0; // number of result sets received
    JobStateSummary finalState = new JobStateSummary();
    try
    {
      for (int j = 0; j < jobs.length; j++)
      {
        finalState.updateJobPanelState(wsInfo, OutputHeader, jobs[j]);
        if (jobs[j].isSubmitted() && jobs[j].isSubjobComplete()
                && jobs[j].hasResults())
        {
          results++;
          // if (Cache.isDebugEnabled())
          // {
          // System.out.println("Job lob for job
          // "+jobs[j].getJobId()+":"+jobs[j].getJobnum());
          // System.out.println(jobs[j].getStatus());
          // }

          vamsas.objects.simple.Alignment valign = ((MsaResult) ((MsaWSJob) jobs[j]).result)
                  .getMsa();
          if (valign != null)
          {
            wsInfo.appendProgressText(jobs[j].getJobnum(), MessageManager
                    .getString("info.alignment_object_method_notes"));
            String[] lines = valign.getMethod();
            for (int line = 0; line < lines.length; line++)
            {
              wsInfo.appendProgressText(jobs[j].getJobnum(),
                      lines[line] + "\n");
            }
            // JBPNote The returned files from a webservice could be
            // hidden behind icons in the monitor window that,
            // when clicked, pop up their corresponding data

          }
        }
      }
    } catch (Exception ex)
    {

      Console.error(
              "Unexpected exception when processing results for " + alTitle,
              ex);
      wsInfo.setStatus(WebserviceInfo.STATE_STOPPED_ERROR);
    }
    if (results > 0)
    {
      wsInfo.showResultsNewFrame
              .addActionListener(new java.awt.event.ActionListener()
              {
                @Override
                public void actionPerformed(java.awt.event.ActionEvent evt)
                {
                  displayResults(true);
                }
              });
      wsInfo.mergeResults
              .addActionListener(new java.awt.event.ActionListener()
              {
                @Override
                public void actionPerformed(java.awt.event.ActionEvent evt)
                {
                  displayResults(false);
                }
              });
      wsInfo.setResultsReady();
    }
    else
    {
      wsInfo.setFinishedNoResults();
    }
  }

  void displayResults(boolean newFrame)
  {
    // view input or result data for each block
    Vector alorders = new Vector();
    SequenceI[][] results = new SequenceI[jobs.length][];
    AlignmentOrder[] orders = new AlignmentOrder[jobs.length];
    for (int j = 0; j < jobs.length; j++)
    {
      if (jobs[j].hasResults())
      {
        Object[] res = ((MsaWSJob) jobs[j]).getAlignment();
        alorders.add(res[1]);
        results[j] = (SequenceI[]) res[0];
        orders[j] = (AlignmentOrder) res[1];

        // SequenceI[] alignment = input.getUpdated
      }
      else
      {
        results[j] = null;
      }
    }
    Object[] newview = input.getUpdatedView(results, orders, getGapChar());
    // trash references to original result data
    for (int j = 0; j < jobs.length; j++)
    {
      results[j] = null;
      orders[j] = null;
    }
    SequenceI[] alignment = (SequenceI[]) newview[0];
    HiddenColumns hidden = (HiddenColumns) newview[1];
    Alignment al = new Alignment(alignment);
    // TODO: add 'provenance' property to alignment from the method notes
    // accompanying each subjob
    if (dataset != null)
    {
      al.setDataset(dataset);
    }

    propagateDatasetMappings(al);
    // JBNote- TODO: warn user if a block is input rather than aligned data ?

    if (newFrame)
    {
      AlignFrame af = new AlignFrame(al, hidden, AlignFrame.DEFAULT_WIDTH,
              AlignFrame.DEFAULT_HEIGHT);

      // initialise with same renderer settings as in parent alignframe.
      af.getFeatureRenderer().transferSettings(this.featureSettings);
      // update orders
      if (alorders.size() > 0)
      {
        if (alorders.size() == 1)
        {
          af.addSortByOrderMenuItem(WebServiceName + " Ordering",
                  (AlignmentOrder) alorders.get(0));
        }
        else
        {
          // construct a non-redundant ordering set
          Vector names = new Vector();
          for (int i = 0, l = alorders.size(); i < l; i++)
          {
            String orderName = new String(" Region " + i);
            int j = i + 1;

            while (j < l)
            {
              if (((AlignmentOrder) alorders.get(i))
                      .equals((alorders.get(j))))
              {
                alorders.remove(j);
                l--;
                orderName += "," + j;
              }
              else
              {
                j++;
              }
            }

            if (i == 0 && j == 1)
            {
              names.add(new String(""));
            }
            else
            {
              names.add(orderName);
            }
          }
          for (int i = 0, l = alorders.size(); i < l; i++)
          {
            af.addSortByOrderMenuItem(
                    WebServiceName + ((String) names.get(i)) + " Ordering",
                    (AlignmentOrder) alorders.get(i));
          }
        }
      }

      Desktop.addInternalFrame(af, alTitle, AlignFrame.DEFAULT_WIDTH,
              AlignFrame.DEFAULT_HEIGHT);

    }
    else
    {
      System.out.println("MERGE WITH OLD FRAME");
      // TODO: modify alignment in original frame, replacing old for new
      // alignment using the commands.EditCommand model to ensure the update can
      // be undone
    }
  }

  @Override
  public boolean canMergeResults()
  {
    return false;
  }
}
