<?php
// 00. INITIALIZATION ----------------------------------------------------------
// * Load Parametres, Session and Functions;
// * Check User Permitions
// * Check Script Call
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////

  include("config/parametres.php");
  include("includes/sessions.php");
  include("includes/functions.php");

  // if visitor has no ROLE -or- if ADMIN : then redirect to Login|Panel
  // ---------------------------------------------------------------------------
  if (!ROLE || (ROLE == ADMIN)) {
    header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
    header("Cache-Control: post-check=0, pre-check=0", false);
    header("Pragma: no-cache");
    header("Location: /");
    die();
  }

  // if item ID not passed redirec to to Control-Panel (or login)
  // ---------------------------------------------------------------------------
  if (isset($_GET['id']))   $item_id = $_GET['id'];
  else {
      $pi_Error = array('url' => '/', 'msg' => ERR_NEED_ID);
      // include ("includes/show-error.php");
  }


// 01. GET DATA NEEDED ---------------------------------------------------------
// * Load Parametres, Session and Functions;
// * Check User Permitions
// * Check Script Call
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////

  // get totals of categories
  // ---------------------------------------------------------------------------
  $totals = get_totals();

  // read fields options (json format)
  // ---------------------------------------------------------------------------
  $formARRAY = json_decode(FORMJSON);

  // get item record
  // ---------------------------------------------------------------------------
  // init database connection
  $_dbc = new mysqli(DB_HOST, DB_USER, DB_PASS, DB_DBMS);
  if ($_dbc->connect_errno) {
    echo "Database connection failed; Please try in a few minutes. ";
    if (TESTING) echo $_dbc->connect_error;
    $_dbc->close(); die();
  }
  $_dbc->set_charset("utf8");

  // prepare statemet
  $_stm = $_dbc->prepare("SELECT identity, operator, `timestamp`, record FROM items WHERE id = ?");
  $_stm->bind_param("d", $item_id);    // bind values
  $_stm->execute();               // execute query
  $_stm->store_result();          // store result

  if ($_stm->num_rows) {

    $_stm->bind_result($idnt, $opr, $tm, $serREC);   // bind result variables
    $_stm->fetch();               // fetch FIRST record values
    // unserialize main record to variable
    $record = unserialize($serREC);

    // edit record
    $record['id'] = $item_id;
    $record['identity'] = $idnt;
    $record['operator'] = $opr;
    $record['itemid'] = end(explode('.', $idnt));
    $record['totalitems'] = $totals[$record['ccode']];
    date_default_timezone_set('Europe/Athens');
    setlocale(LC_ALL, 'el_GR.UTF-8', 'grc');
    $record['timestamp'] = local_dt($tm);
  }
  else {
    return  array('success' => false,  'data' => "No items found");   // return error(s)
  }

  $_stm->close();     // close statement
  $_dbc->close();     // close connection


// 02. RENDER HTML and DATA ----------------------------------------------------
// * Draw fileds from Json Array per section
// * Prepare JS needed
// * Put data from Record
// * Generate JS (prepared + static)
// ---
// Script is based on on ui-new-item.php
// More information about the script workflow can be found there.
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////

  // Init strigns for JS generator (needed to handle everything) ///////////////
  // ---------------------------------------------------------------------------
  $checkFilledJS = "";    // JS for checking empty fields
  $ref2Select2JS = "";    // references to Select2-controls Javascript
  $initSelectsJS = "";    // js to initialize select fields (single or multiple)
  // --- depricated (added static into js) : $addJSreadonly = "";    // js to add readonly fields and their values to port-object

?><!DOCTYPE html>
<html prefix="og: http://ogp.me/ns#" xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-GB" lang="en-GB" dir="ltr">
  <head>
      <!-- Metas + Title -->
      <meta http-equiv="X-UA-Compatible" content="IE=edge">
      <meta name="viewport" content="width=device-width, initial-scale=1">
      <meta http-equiv="content-type" content="text/html; charset=utf-8" />

      <title><?=PROJECT?> : Επεξεργασία Εγγραφής <?=$idnt?></title>

      <!-- CSS needed -->
      <link href="https://fonts.googleapis.com/css?family=Ubuntu:400,700&display=swap" rel="stylesheet">
      <link rel="stylesheet" href="/css/bootstrap.min.css" /><!-- v4.4.1 -->
      <link rel="stylesheet" href="/css/select2.min.css" /><!-- v4.0.10 -->
      <link rel="stylesheet" href="/css/pi.css" />
  </head>
  <body>

  <?php // Menu ----------------------------------------------------------------
        include("includes/menu.php");
  ?>


<div class="pi-container">
<h2>Επεξεργασία Εγγραφής <?=$idnt?></h2>

<form id="post-form" method="POST">

  <!-- TABS (start) -->
  <div id="tabsContainer">
    <div class="tabArea">

<?php $i = 1; ?>
<?php foreach ($formARRAY as $key => $section) : ?>
    <!-- START fields group (section) ////////////////////////////////////////// -->

    <input id="tab<?=$i?>" type="radio" name="tabs" value="<?=$i?>"<?=($i == 1) ? ' checked' : ''?>>
    <label for="tab<?=$i?>"><?=$section->label?></label>
    <div id="content<?=$i?>" class="tab--content">
      <div class="form-row">


    <?php foreach ($section->childs as $kk => $field) : ?>
        <?php

        // get atributes of field
        $atrs = explode('|', $field->atr);                      // attributes array
        $ak = in_array('append-key', $atrs) ? true : false;     // append key (for selects)
        $rq = in_array('required', $atrs) ? 'required' : '';    // required
        $class = (isset($field->len)) ? ' col-md-'.$field->len : 'col-md-12';   // column class (for width)

        ?>

        <!-- form group -->
        <div class="form-group <?=$class?>">
            <label for="<?=$field->nam?>">
              <?=$field->lab?>
              <?php if (($field->typ == 'select') && C_LABEL) : ?>
                <span><?=$field->nam?></span>
              <?php endif; ?>
            </label>

        <?php

        switch ($field->typ) {

              case 'select':

                  // exclude CCODE from default select behaviour
                  // because CCODE SHALL NOT CHANGE
                  if ($field->nam == 'ccode') {

                    $fdata = parse_any($field->nam, $record['ccode']);    // parse field + current value

                    $txt = $fdata['multi'] ? implode(", ", $fdata['value']) : $fdata['value'];    // if array of values, implode values

                    echo '<input class="form-control" type="text" name="ccode" value="'. $txt .'" readonly>';

                    $checkFilledJS .= "
                        values.ccode = '". $record['ccode'] ."';
                    ";

                  }
                  else {

                      // if MULTIPLE select
                      // ( deferantiate class for multi or single this will allow the { allowClear: true } option )
                      // ( see: https://select2.org/placeholders )
                      if (in_array('multiple', $atrs)) {
                        // MULTIPLE control: set name and multiple attribute
                        $name_n_multi = 'name="'. $field->nam .'[]" multiple="multiple">';

                        // prepare initialization of select2 (multiple)
                        $initSelectsJS .= "
                        var ". $field->nam ." = $('#". $field->nam ."');
                        ". $field->nam .".select2({ width: '100%' });
                        ";    // depricated: ". $field->nam .".select2({ placeholder: '". $field->lab ."', width: '100%' });

                        // and set init value
                        if ($record[$field->nam] !="") {
                          $initSelectsJS .= "
                          ". $field->nam .".val( ['". str_replace(",", "','", $record[$field->nam]) ."'] );
                          ". $field->nam .".trigger('change');
                          ";
                        }

                        // prepare check if empty field
                        $checkFilledJS .= "
                            if (getValues(".$field->nam.") =='') {
                              empty += '<span>". $section->label .":</span> ". $field->lab . (($rq == '') ? "" : " **") ."<br />';
                              ". (($rq == '') ? "" : "needit.push('". $section->label .":". $field->lab ."');") ."
                            }
                            values.". $field->nam ." = getValues(".$field->nam.");
                        ";
                      }
                      else {
                        // is SINGLE control: only name needed
                        $name_n_multi = 'name="'. $field->nam .'"';

                        // prepare initialization of select2 (single)
                        $initSelectsJS .= "
                          var ". $field->nam ." = $('#". $field->nam ."');
                          ". $field->nam .".select2({ placeholder: ' ', allowClear: true });
                        ";    // depricated: ". $field->nam .".select2({ placeholder: '". $field->lab ."', allowClear: true });

                        // and set init value
                        if ($record[$field->nam] !="") {
                          $initSelectsJS .= "
                          ". $field->nam .".val( ['". str_replace(",", "','", $record[$field->nam]) ."'] );
                          ". $field->nam .".trigger('change');
                          ";
                        }

                        // prepare check if empty field
                        $checkFilledJS .= "
                            if (getValues(".$field->nam.") =='') {
                              empty += '<span>". $section->label .":</span> ". $field->lab . (($rq == '') ? "" : " **") ."<br />';
                              ". (($rq == '') ? "" : "needit.push('". $section->label .":". $field->lab ."');") ."
                            }
                            values.". $field->nam ." = getValues(".$field->nam.");
                        ";
                      }
                      ?>
                      <select id="<?=$field->nam?>" class="select-field" <?=$name_n_multi?> style="width:100%;">

                          <?php if (!in_array('multiple', $atrs)) : ?>
                            <option></option>
                          <?php endif; ?>
                          <?php foreach ($field->opt as $kkk => $val): ?>
                            <option value="<?=$val->id?>"><?=(($ak) ? $val->id.' : ' : '' ) .$val->tag?></option>
                          <?php endforeach; ?>
                      </select>
        <?php
                  }
                  break;

              case 'text':
                  $checkFilledJS .= "
                      if ($('input[name=". $field->nam ."]').val() =='') {
                        empty += '<span>". $section->label .":</span> ". $field->lab . (($rq == '') ? "" : " **") ."<br />';
                        ". (($rq == '') ? "" : "needit.push('". $section->label .":". $field->lab ."');") ."
                      }
                      values.". $field->nam ." = $('input[name=". $field->nam ."]').val();
                  ";
                  ?>
                  <input class="form-control" type="text" name="<?=$field->nam?>" value="<?=$record[$field->nam]?>" <?=$rq?>>
        <?php     break;

              case 'integer':
                  $checkFilledJS .= "
                      if ($('input[name=". $field->nam ."]').val() =='') {
                        empty += '<span>". $section->label .":</span> ". $field->lab . (($rq == '') ? "" : " **") ."<br />';
                        ". (($rq == '') ? "" : "needit.push('". $section->label .":". $field->lab ."');") ."
                      }
                      values.". $field->nam ." = $('input[name=". $field->nam ."]').val();
                  ";
                  ?>
                  <input class="form-control" type="number" name="<?=$field->nam?>" value="<?=$record[$field->nam]?>" min="0" step="1" <?=$rq?>>
        <?php     break;

              case 'float':
                  // credit: https://stackoverflow.com/questions/19011861/is-there-a-float-input-type-in-html5
                  $checkFilledJS .= "
                      if ($('input[name=". $field->nam ."]').val() =='') {
                        empty += '<span>". $section->label .":</span> ". $field->lab . (($rq == '') ? "" : " **") ."<br />';
                        ". (($rq == '') ? "" : "needit.push('". $section->label .":". $field->lab ."');") ."
                      }
                      values.". $field->nam ." = $('input[name=". $field->nam ."]').val();
                  ";
                  ?>
                  <input class="form-control" type="number" name="<?=$field->nam?>" value="<?=$record[$field->nam]?>" min="0" step="0.1" <?=$rq?>>
        <?php     break;

              case 'textarea':
                  $checkFilledJS .= "
                      if ($('textarea[name=". $field->nam ."]').val() =='') {
                        empty += '<span>". $section->label .":</span> ". $field->lab . (($rq == '') ? "" : " **") ."<br />';
                        ". (($rq == '') ? "" : "needit.push('". $section->label .":". $field->lab ."');") ."
                      }
                      values.". $field->nam ." = $('textarea[name=". $field->nam ."]').val();
                  ";
                  ?>
                  <textarea class="form-control" name="<?=$field->nam?>" <?=$rq?>><?=$record[$field->nam]?></textarea>
        <?php     break;

              case 'auto':
                  // On EDIT mode the 'auto' fields have already their (read-only) value
                  ?>
                  <input class="form-control" type="text" name="<?=$field->nam?>" value="<?=$record[$field->nam]?>" readonly>
        <?php     break;

              default: ?>
                  <?=$field->nam?> (<?=$field->lab?>) : UNKNOWN TYPE

        <?php
      }   // end switch

      unset($atrs);   // free array to re-use (on next field)
      ?>
      </div>
      <!-- end /form group -->

    <?php endforeach; ?>

    </div><!-- /form-row -->
  </div><!-- /tab-.-content -->
  <?php $i++; ?>

    <!-- END fields group (section) -->
<?php endforeach; ?>


    </div>
  </div>
  <!-- TABS (end) -->

    <!-- footer of form -->

    <div class="row">

      <div class="col-md-4 line-right">
        <h3>Δεν έχουν συμπληρωθεί:</h3>
        <div id="empty-fields"></div>
      </div>

      <div class="col-md-8">

        <!-- custom field -->
        <div class="form-group">
          <label for="more">Συμπληρωματική Πληροφορία</label>
          <?php
            $fdata = parse_any($field->nam, $record['note']);    // parse field + current value
            $txt = $fdata['value'];    // if array of values, implode values
          ?>
          <textarea name="note" class="form-control tall"><?=$txt?></textarea>
          <?php
          // append js code
          // for checking if field is empty
          // and attaching value to json data
          $checkFilledJS .= "
              if ($('textarea[name=note]').val() =='') {
                empty += '<span>Γενικά:</span>Συμπληρωματική Πληροφορία<br />';
              }
              values.note = $('textarea[name=note]').val();
          ";
          ?>
        </div>

        <div class="form-group">
          <input class="btn btn-primary" type="submit" value="Καταχώρηση Εγγραφής">
        </div>
      </div>

    </div>

</form>
</div>
<!-- DOM ENDS HERE -->

  <!-- scripts and libraries
  load and register one by one, so you don't need to worry about if they are ready -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-migrate/1.4.1/jquery-migrate.min.js"></script>
<script src="/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.10/js/select2.full.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.10/js/i18n/el.js"></script>
<script>
// NOW RUN EVERYTHING AFTER JQUERY (AND DOM ready)
// -----------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////

  // 00. FLAGS and NEEDED FUNCTIONS
  // ---------------------------------------------------------------------------
  //////////////////////////////////////////////////////////////////////////////

  var waitingResponse = false;    // flag for an ajax request that was sent and still waiting response

  // pure JS ajax GET request
  // return data as JSON
  // no fancy things like UTF8; if needed use base64 ---------------------------
  function ajax_get(url, callback) {
      var xmlhttp = new XMLHttpRequest();
      xmlhttp.onreadystatechange = function() {
          if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {

              try {
                  var data = JSON.parse(xmlhttp.responseText);
              } catch(err) {
                  console.log(err.message + " in " + xmlhttp.responseText);
                  return;
              }
              callback(data);
          }
      };

      xmlhttp.open("GET", url, true);
      xmlhttp.send();
  }


  // 01. MENU MANAGEMENT
  // ---------------------------------------------------------------------------
  //////////////////////////////////////////////////////////////////////////////

  // menu management
  // ---------------------------------------------------------------------------
  $('.dropdown-item').on('click', function(e){
    e.preventDefault();

    if (!waitingResponse) {
      waitingResponse = true;

      var r = confirm("Δεν έχετε αποθηκεύσει το τρέχον αντικείμενο!\nΕίστε σίγουροι ότι θέλετε να εγκαταλείψετε τη σελίδα;");
      if (r == true) {

        // all data-goto have the format: 'method,uri_address'
        // uri_address is the url to call
        // method options:
        // * url : means goto url (redirect)
        // * ajax : means call url via ajax; if 'success = true' then goto '/' after that
        // -----------------------------------------------------------------------
        var opt = $(this).data('goto').split(',');  // split data-goto

        if (opt[0] == 'url') {    // if method = url
          window.location.href = opt[1];
        }
        else {                    // else, method = ajax
          ajax_get(opt[1], function(response) {
            if (response.success) {
              window.location.href = '/';
            }
          });
        }

      }
      else {
        // user did not confirmed the selection; do nothing
      }

      waitingResponse = false;
    }

  });

  // 02. USER INTERFACE
  // ---------------------------------------------------------------------------
  //////////////////////////////////////////////////////////////////////////////

  // tabs to accorderon --------------------------------------------------------
  //////////////////////////////////////////////////////////////////////////////

  // FUNCTION: Set tabsContainer height
  // acording to which tab is visible
  // and tab mode (tabs|acordeon)
  // ---------------------------------------------------------------------------
  function set_tabsContainer_height() {
  		var ch_;			// content height
      var tc_base;		// tabs-container base height
      tc_base = ($(window).width() > 650) ? 100 : 400;
  		if ($('#content1').is(':visible'))	ch_ = $('#content1').height();
      if ($('#content2').is(':visible'))	ch_ = $('#content2').height();
      if ($('#content3').is(':visible'))	ch_ = $('#content3').height();
      if ($('#content4').is(':visible'))	ch_ = $('#content4').height();
      if ($('#content5').is(':visible'))	ch_ = $('#content5').height();
      if ($('#content6').is(':visible'))	ch_ = $('#content6').height();

      $('#tabsContainer').height(ch_ + tc_base);

  }
  set_tabsContainer_height();	// init (run for 1st time)

  // on tab selection
  // calculate tabsContainer height
  $('input:radio[name="tabs"]').change( function(){
  		set_tabsContainer_height()
  });

  // on window change
  // set tabsContainer height
  $( window ).resize(function() {
    	set_tabsContainer_height();
  });


  // 03. FORM-CONTROLS
  // ---------------------------------------------------------------------------
  //////////////////////////////////////////////////////////////////////////////

  // Select2 controls
  //////////////////////////////////////////////////////////////////////////////

  // FUNCTION: Get selected value(s) of Select2 control
  // pass arg: source-element
  // return: value(s) comma-separated
  // ---------------------------------------------------------------------------
  function getValues(srcElm) {
    	var res;
    	var obj = srcElm.select2('data');      // get delected data array

    	if (obj.length === 0)    return '';    // if empty list then nothig is selected
      else {
          var i = 0;
      		obj.forEach(function(elm){         // loop through object elements array

              if (i)  res += ',' + elm.id;   // if not first item, prepend ',' befor value(id)
              else    res = elm.id;        	 // else set (first) checked value

              i++;
      		});
      }
      return res;
  }

  // patch select2-multiple widths
  // ---------------------------------------------------------------------------
  $('.select-field').select2({ width: '100%' });

  // init select2 fields
  // (embed from php)
  // ---------------------------------------------------------------------------
  <?=$initSelectsJS?>


  // 04. FORM-LOGIC
  // ---------------------------------------------------------------------------
  //////////////////////////////////////////////////////////////////////////////

  // FUNCTION: Report empty fields
  // ---------------------------------------------------------------------------
  function reportEmpty() {
    var empty = '';
    var needit = [];
    var values = {};

    // embed if-conditions from php
    <?=$checkFilledJS?>

    $("#empty-fields").html(empty);   // render empty fields

    // console.log(JSON.stringify(values));

    return { need : needit, data: values };    // return all fields
  }
  reportEmpty();

  $('form').on('keyup change paste', 'input, select, textarea', function(){
      console.log('Form changed!');
      reportEmpty();
  });

  // validation?
  // check: https://www.sitepoint.com/instant-validation/


  $('#post-form').on('submit', function(e){
    e.preventDefault();
    if (!waitingResponse) {
        waitingResponse = true;
        var resp = reportEmpty();

        // add static (readonly) data to resp.data object
        resp.data.id = <?=$item_id?>;
        resp.data.identity = '<?=$idnt?>';

        if (resp.need.length > 0) alert("Tα πεδία:\n\n" + resp.need.join(',\n') + "\n\nείναι υποχρεωτικά!");
        else {
          // alert('sending: '+JSON.stringify(resp.data));

          var postUrl = "/ajax.php?do=upditem&id=<?=$item_id?>";   // url to post form
          var data2send = resp.data;      // parse data to send

          $.ajax({
            type: 'POST',
            url: postUrl,    // make sure you respect the same origin policy with this url
            data: data2send,
            dataType: "text",

            success: function(data) {  // server replies
                var json = $.parseJSON(data);
                if (json.success == true) {   // good! post accepted
                    // alert(json.id)
                    window.location.href = '/ui-show-item.php?id=<?=$item_id?>'
                }
                else {
                     alert("Post not accepted.\nPlease check the data you submit.");
                }
            },

            error: function() {
              alert('Some ajax error! :(');
            }
          });

        }

        waitingResponse = false;
    }

  });
</script>
  </body>
</html>