/**
 * @file interface.js
 * 
 * @brief 
 * JsonEditor is an editor to display and edit JSON data in a treeview. 
 * 
 * Supported browsers: Chrome, Firefox, Safari, Opera, Internet Explorer 8+ 
 * 
 * @license
 * This json editor is open sourced with the intention to use the editor as 
 * a component in your own application. Not to just copy and monetize the editor
 * as it is.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy 
 * of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 *
 * Copyright (C) 2011-2012 Jos de Jong, http://jsoneditoronline.org
 *
 * @author  Jos de Jong, <wjosdejong@gmail.com>
 * @date    2012-04-21
 */
 

var editor = null;
var formatter = null;

var main = {};

main.formatterToEditor = function() {
  try {
    editor.set(formatter.get());
  }
  catch (err) {
    main.showError(err);
  }
}

main.editorToFormatter = function () {
  try {
    formatter.set(editor.get());
  }
  catch (err) {
    main.showError(err);
  }
}

main.eventParams = {};
main.onMouseDown = function (event) {
  var leftButtonDown = event.which ? (event.which == 1) : (event.button == 1);
  if (!leftButtonDown) {
    return;
  }

  if (!main.eventParams.mousedown) {
    main.eventParams.mousedown = true;
    main.eventParams.mousemove = 
      JSONEditor.Events.addEventListener(document, 'mousemove', main.onMouseMove);
    main.eventParams.mouseup = 
      JSONEditor.Events.addEventListener(document, 'mouseup', main.onMouseUp);        
    main.eventParams.screenX = event.screenX;
    main.eventParams.splitterFraction = main.splitterFraction; 
  }
  JSONEditor.Events.preventDefault(event);
}

main.onMouseMove = function (event) {
  var width = (window.innerWidth || document.body.offsetWidth || 
    document.documentElement.offsetWidth);

  var diff = event.screenX - main.eventParams.screenX;

  main.splitterFraction = main.eventParams.splitterFraction + diff / width;
  if (main.splitterFraction < 0.1) {
    main.splitterFraction = 0.1;
  }
  if (main.splitterFraction > 0.9) {
    main.splitterFraction = 0.9;
  }

  main.resize();
  
  JSONEditor.Events.preventDefault(event);
}

main.onMouseUp = function (event) {
  if (main.eventParams.mousedown) {
    JSONEditor.Events.removeEventListener(document, 'mousemove', main.eventParams.mousemove);
    JSONEditor.Events.removeEventListener(document, 'mouseup', main.eventParams.mouseup);
    main.eventParams.mousemove = undefined;
    main.eventParams.mouseup = undefined;
    main.eventParams.mousedown = false;
  }
  JSONEditor.Events.preventDefault(event);
}

main.load = function() {
  var json = {
    "Name": "John Smith",
    "Age": 32,
    "Employed": true,
    "Address": {
      "Street": "701 First Ave.",
      "City": "Sunnyvale, CA 95125",
      "Country": "United States"  
    },
    "Children": [
      {
        "Name": "Richard",
        "Age": 7
      },
      {
        "Name": "Susan",
        "Age": 4
      },
      {
        "Name": "James",
        "Age": 3
      }
    ]
  };      
  
  try {
    // formatter
    var container = document.getElementById("jsonformatter");
    formatter = new JSONFormatter(container);
    formatter.set(json);
    formatter.onError = function (err) {
      main.showError(err);
    }

    // editor
    var container = document.getElementById("jsoneditor");
    editor = new JSONEditor(container);
    editor.set(json);      

    // splitter
    var domSplitter = document.getElementById('splitter');
    domSplitter.innerHTML =
      '<br><br><br>' +
      '<button id="toForm" onclick="main.formatterToEditor();" title="JSON to Editor" class="convert"> <img src="img/treeRightTriangleBlack.png" style="width:8px; height:8px; margin-left:2px;"></button><br>' +
      '<br>' +
      '<button id="toJSON" onclick="main.editorToFormatter();" title="Editor to JSON" class="convert"><img src="img/treeLeftTriangleBlack.png" style="width:8px; height:8px; margin-right:2px;"></button>';
    JSONEditor.Events.addEventListener(domSplitter, "mousedown", main.onMouseDown);
    
    // resize
    JSONEditor.Events.addEventListener(window, 'resize', main.resize);
    
    // TODO: implement a focus method
    formatter.textarea.focus();
    
    // TODO: a nicer method to check for changes
    var formatterLastContent;
    var editorLastContent;
    function checkChange () {
      try {
        // check for change in formatter
        var formatterJSON = formatter.get();
        var formatterContent = JSON.stringify(formatterJSON);
        if (formatterContent != formatterLastContent) {
          formatterLastContent = formatterContent;
          editorLastContent = formatterContent;
          editor.set(formatterJSON);
        }
        else {
          // check for change in editor
          var editorJSON = editor.get();
          var editorContent = JSON.stringify(editorJSON);
          if (editorContent != editorLastContent) {
            editorLastContent = editorContent;
            formatterLastContent = editorContent;
            formatter.set(editorJSON);
          }
        }            
      }
      catch (err) {
        main.showError(err);
      }
      
      setTimeout(checkChange, 1000);
    }
    /* TODO: use checkChange
    checkChange();
    */
  } catch (err) {
    var msg = err.message || err;
    main.showError('Error: ' + msg);
  }

}

main.splitterFraction = 0.5;

main.resize = function() {
  var domEditor = document.getElementById('jsoneditor');
  var domFormatter = document.getElementById('jsonformatter');
  var domSplitter = document.getElementById('splitter');
  var domAd = document.getElementById('ad');
  
  var width = window.innerWidth || document.body.offsetWidth || document.documentElement.offsetWidth;
  var height = window.innerHeight || document.body.offsetHeight || document.documentElement.offsetHeight;
  var adWidth = domAd ? domAd.clientWidth : 0;
  var splitterWidth = domSplitter.clientWidth;
  if (adWidth) {
    width -= (adWidth + 15); // Not so nice, +15 here for the margin
 }

  var splitterLeft = width * main.splitterFraction;

  // resize formatter
  domFormatter.style.width = (splitterLeft) + 'px'; 
  
  // resize editor
  domEditor.style.left = (splitterLeft + splitterWidth) + 'px';
  domEditor.style.width = (width - splitterLeft - splitterWidth) + 'px';
  //editor.onResize(); // TODO
}

main.errorFrame = undefined;
main.showError = function (message) {
  if (!main.errorFrame) {
    var width = 500;
    var top = 5;
    var windowWidth = document.body.offsetWidth ||  window.innerWidth;
    main.errorFrame = document.createElement('div');
    main.errorFrame.style.position = 'absolute';
    main.errorFrame.style.left = (windowWidth - width) / 2 + 'px';
    main.errorFrame.style.width = width + 'px';
    main.errorFrame.style.top = top + 'px';
    document.body.appendChild(main.errorFrame);
  }
  
  var error = document.createElement('div');
  error.className = 'error';
  error.style.position = 'relative';
  main.errorFrame.appendChild(error);
  
  var table = document.createElement('table');
  table.style.width = '100%';
  error.appendChild(table);
  var tbody = document.createElement('tbody');
  table.appendChild(tbody);
  var tr = document.createElement('tr');
  tbody.appendChild(tr);
  
  var tdMessage = document.createElement('td');
  tdMessage.innerHTML = message;
  tr.appendChild(tdMessage);
  
  var tdClose = document.createElement('td');
  tdClose.style.textAlign = 'right';
  tdClose.style.verticalAlign = 'top';
  tr.appendChild(tdClose);
  
  var closeDiv = document.createElement('button');
  closeDiv.innerHTML = '&times;';
  closeDiv.title = 'Close error message';
  tdClose.appendChild(closeDiv);
  closeDiv.onclick = function (event) {
    if (error.parentNode) {
      error.parentNode.removeChild(error);
    }
    
    if (main.errorFrame.childNodes.length == 0) {
      main.errorFrame.parentNode.removeChild(main.errorFrame);
      main.errorFrame = undefined;
    }    
  }
}

main.hideAds = function() {
  var domAd = document.getElementById("ad");
  domAd.parentNode.removeChild(domAd);
  main.resize();
}