/**
 * Orthanc - A Lightweight, RESTful DICOM Store
 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
 * Department, University Hospital of Liege, Belgium
 * Copyright (C) 2017-2022 Osimis S.A., Belgium
 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
 *
 * 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 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 **/


function IsoToDicomDate(s)
{
  return s.substring(0, 4) + s.substring(5, 7) + s.substring(8, 10);
}

function GenerateDicomDate(days)
{
  var today = new Date();
  var utc = new Date(today);
  utc.setDate(today.getDate() + days);

  /**
   * "utc" contains the date of interest, as selected by the user.
   * Calling "utc.toISOString()" would return a date in the UTC
   * timezone, whereas the user expects the date to be expressed in
   * her own timezone. We thus adjust from UTC to the local timezome.
   * https://stackoverflow.com/a/50537435
   * https://groups.google.com/g/orthanc-users/c/dK7EEPVpedk/m/DPtMRFnKAgAJ
   **/
  var timezoneOffset = today.getTimezoneOffset() * 60 * 1000;
  var localDate = new Date(utc.getTime() - timezoneOffset);
  
  return IsoToDicomDate(localDate.toISOString());
}


$('#query-retrieve').live('pagebeforeshow', function() {
  var targetDate;

  $.ajax({
    url: '../modalities',
    dataType: 'json',
    async: false,
    cache: false,
    success: function(modalities) {
      var targetServer = $('#qr-server');
      var option;

      $('option', targetServer).remove();

      for (var i = 0; i < modalities.length; i++) {
        option = $('<option>').text(modalities[i]);
        targetServer.append(option);
      }

      targetServer.selectmenu('refresh');
    }
  });

  targetDate = $('#qr-date');
  $('option', targetDate).remove();
  targetDate.append($('<option>').attr('value', '').text('Any date'));
  targetDate.append($('<option>').attr('value', GenerateDicomDate(0)).text('Today'));
  targetDate.append($('<option>').attr('value', GenerateDicomDate(-1)).text('Yesterday'));
  targetDate.append($('<option>').attr('value', GenerateDicomDate(-7) + '-').text('Last 7 days'));
  targetDate.append($('<option>').attr('value', GenerateDicomDate(-31) + '-').text('Last 31 days'));
  targetDate.append($('<option>').attr('value', GenerateDicomDate(-31 * 3) + '-').text('Last 3 months'));
  targetDate.append($('<option>').attr('value', GenerateDicomDate(-365) + '-').text('Last year'));
  targetDate.append($('<option>').attr('value', 'specific').text('Specific date'));
  targetDate.selectmenu('refresh');

  $('#qr-date-specific').hide();
});


$('#qr-date').live('change', function() {
  if ($(this).val() == 'specific') {
    $('#qr-date-specific').show();
  } else {
    $('#qr-date-specific').hide();
  }
});


$('#qr-echo').live('click', function() {
  var server = $('#qr-server').val();
  var message = 'Error: The C-Echo has failed!';

  $.ajax({
    url: '../modalities/' + server + '/echo',
    data: '{}',  // Fix for issue #183 (regression from Orthanc 1.6.1 to 1.7.0)
    type: 'POST', 
    cache: false,
    async: false,
    success: function() {
      message = 'The C-Echo has succeeded!';
    }
  });

  $('<div>').simpledialog2({
    mode: 'button',
    headerText: 'Echo result',
    headerClose: true,
    buttonPrompt: message,
    animate: false,
    buttons : {
      'OK': { click: function () { } }
    }
  });

  return false;
});


$('#qr-submit').live('click', function() {
  var query, server, modalities, field, studyDate;

  studyDate = $('#qr-date').val();
  if (studyDate == 'specific') {
    studyDate = IsoToDicomDate($('#qr-date-specific').val());
  }

  query = {
    'Level' : 'Study',
    'Query' : {
      'AccessionNumber' : '',
      'PatientBirthDate' : '',
      'PatientID' : '',
      'PatientName' : '',
      'PatientSex' : '',
      'StudyDate' : studyDate,
      'StudyDescription' : ''
    }
  };

  modalities = '';

  field = $('#qr-fields input:checked').val();
  query['Query'][field] = $('#qr-value').val().toUpperCase();

  $('#qr-modalities input:checked').each(function() {
    var s = $(this).attr('name');
    if (modalities == '')
      modalities = s;
    else
      modalities += '\\' + s;
  });

  if (modalities.length > 0) {
    query['Query']['ModalitiesInStudy'] = modalities;
  }


  server = $('#qr-server').val();
  $.ajax({
    url: '../modalities/' + server + '/query',
    type: 'POST', 
    data: JSON.stringify(query),
    dataType: 'json',
    async: false,
    error: function() {
      alert('Error during query (C-Find)');
    },
    success: function(result) {
      ChangePage('query-retrieve-2', {
        'server' : server,
        'uuid' : result['ID']
      });
    }
  });

  return false;
});



$('#query-retrieve-2').live('pagebeforeshow', function() {
  var pageData, uri;
  
  if ($.mobile.pageData) {
    pageData = DeepCopy($.mobile.pageData);

    uri = '../queries/' + pageData.uuid + '/answers';

    $.ajax({
      url: uri,
      dataType: 'json',
      async: false,
      success: function(answers) {
        var target = $('#query-retrieve-2 ul');
        $('li', target).remove();

        for (var i = 0; i < answers.length; i++) {
          $.ajax({
            url: uri + '/' + answers[i] + '/content?simplify',
            dataType: 'json',
            async: false,
            success: function(study) {
              var series = '#query-retrieve-3?server=' + pageData.server + '&uuid=' + study['StudyInstanceUID'];

              var content = ($('<div>')
                             .append($('<h3>').text(study['PatientID'] + ' - ' + study['PatientName']))
                             .append($('<p>').text('Accession number: ')
                                     .append($('<b>').text(study['AccessionNumber'])))
                             .append($('<p>').text('Birth date: ')
                                     .append($('<b>').text(study['PatientBirthDate'])))
                             .append($('<p>').text('Patient sex: ')
                                     .append($('<b>').text(study['PatientSex'])))
                             .append($('<p>').text('Study description: ')
                                     .append($('<b>').text(study['StudyDescription'])))
                             .append($('<p>').text('Study date: ')
                                     .append($('<b>').text(FormatDicomDate(study['StudyDate'])))));

              var info = $('<a>').attr('href', series).html(content);
              
              var answerId = answers[i];
              var retrieve = $('<a>').text('Retrieve all study').click(function() {
                ChangePage('query-retrieve-4', {
                  'query' : pageData.uuid,
                  'answer' : answerId,
                  'server' : pageData.server
                });
              });

              target.append($('<li>').append(info).append(retrieve));
            }
          });
        }

        target.listview('refresh');
      }
    });
  }
});


$('#query-retrieve-3').live('pagebeforeshow', function() {
  var pageData, query;

  if ($.mobile.pageData) {
    pageData = DeepCopy($.mobile.pageData);

    query = {
      'Level' : 'Series',
      'Query' : {
        'Modality' : '',
        'ProtocolName' : '',
        'SeriesDescription' : '',
        'SeriesInstanceUID' : '',
        'StudyInstanceUID' : pageData.uuid
      }
    };

    $.ajax({
      url: '../modalities/' + pageData.server + '/query',
      type: 'POST', 
      data: JSON.stringify(query),
      dataType: 'json',
      async: false,
      error: function() {
        alert('Error during query (C-Find)');
      },
      success: function(answer) {
        var queryUuid = answer['ID'];
        var uri = '../queries/' + answer['ID'] + '/answers';

        $.ajax({
          url: uri,
          dataType: 'json',
          async: false,
          success: function(answers) {
            
            var target = $('#query-retrieve-3 ul');
            $('li', target).remove();

            for (var i = 0; i < answers.length; i++) {
              $.ajax({
                url: uri + '/' + answers[i] + '/content?simplify',
                dataType: 'json',
                async: false,
                success: function(series) {
                  var content = ($('<div>')
                                 .append($('<h3>').text(series['SeriesDescription']))
                                 .append($('<p>').text('Modality: ')
                                         .append($('<b>').text(series['Modality'])))
                                 .append($('<p>').text('ProtocolName: ')
                                         .append($('<b>').text(series['ProtocolName']))));

                  var info = $('<a>').html(content);

                  var answerId = answers[i];
                  info.click(function() {
                    ChangePage('query-retrieve-4', {
                      'query' : queryUuid,
                      'study' : pageData.uuid,
                      'answer' : answerId,
                      'server' : pageData.server
                    });
                  });

                  target.append($('<li>').attr('data-icon', 'arrow-d').append(info));
                }
              });
            }

            target.listview('refresh');
          }
        });
      }
    });
  }
});



$('#query-retrieve-4').live('pagebeforeshow', function() {
  var pageData, uri;
  
  if ($.mobile.pageData) {
    var pageData = DeepCopy($.mobile.pageData);
    var uri = '../queries/' + pageData.query + '/answers/' + pageData.answer + '/retrieve';

    $.ajax({
      url: '../system',
      dataType: 'json',
      async: false,
      cache: false,
      success: function(system) {
        $('#retrieve-target').val(system['DicomAet']);

        $('#retrieve-form').submit(function(event) {
          var aet;

          event.preventDefault();

          aet = $('#retrieve-target').val();
          if (aet.length == 0) {
            aet = system['DicomAet'];
          }

          $.ajax({
            url: uri,
            type: 'POST',
            async: true,  // Necessary to block UI
            dataType: 'text',
            data: aet,
            beforeSend: function() {
              $.blockUI({ message: $('#info-retrieve') });
            },
            complete: function(s) {
              $.unblockUI();
            },
            success: function() {
              if (pageData.study) {
                // Go back to the list of series
                ChangePage('query-retrieve-3', {
                  'server' : pageData.server,
                  'uuid' : pageData.study
                });
              } else {
                // Go back to the list of studies
                ChangePage('query-retrieve-2', {
                  'server' : pageData.server,
                  'uuid' : pageData.query
                });
              }
            },
            error: function() {
              alert('Error during retrieve');
            }
          });
        });
      }
    });
  }
});