// PAPERWEB - GPLv3 licence
// Copyright 2006-2016 Yves Gablin
//  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/>.
//
var paperweb = {
  //private static function purgeSection()
  purgeSection: function(section) {
    for (var i = section.childNodes.length; i--;) {
      section.removeChild(section.childNodes[i]);
    }
  },

  // public static function prepareQuery()
  prepareQuery: function() {
    var button = document.querySelector('header button');
    ajax.link(button,
      function(thisButton) {
        var inputs = document.querySelectorAll('header input');
        return encodeURI('query.ajax.php?doQuery=1&D='+inputs[0].value
          +'&L='+inputs[1].value+'&K='+inputs[2].value);
      },
      paperweb.updateResult,
      ajax.XML, true);
  },

  // public static function prepareThumbs()
  prepareThumbs: function() {
    var buttons = document.querySelectorAll('#result button');
    for (var i = buttons.length; i--;) {
      buttons[i].addEventListener('click', paperweb.changeCurrentDocument);
      ajax.link(buttons[i],
        function(thisButton) {
          return encodeURI('thumbs.ajax.php?doThumbnails='+thisButton.value);
        },
        paperweb.updateThumbs,
        ajax.XML, true);
    }
  },

  // public static function updateResult(xml)
  updateResult: function(xml) {
    var newSection = ajax.importNode(xml.documentElement, document);
    var section = document.getElementById('result');
    section.parentNode.replaceChild(newSection, section);
    paperweb.purgeSection(document.getElementById('thumbs'));
    paperweb.prepareThumbs();
  },

  // public static function updateThumbs(xml)
  updateThumbs: function(xml) {
    var section = document.getElementById('thumbs');
    section.parentNode.replaceChild(ajax.importNode(xml.documentElement, document), section);
  },

  // public static function changeCurrentDocument(evt)
  changeCurrentDocument: function(evt) {
    var buttons = document.querySelectorAll('#result button');
    for (var i = buttons.length; i--;) {
      buttons[i].disabled = (buttons[i] === this);
    }
  }
};

window.addEventListener('load', paperweb.prepareQuery);