/*
  Copyright 2008 Riccardo Govoni battlehorse@gmail.com

  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.
*/

organizer = {};

organizer.MagicCard = function(id, power, element) {
  this.id = id;
  this.power = power;
  this.element = element;
};

organizer.models = [
  new organizer.MagicCard("1",  4, ['earth']),
  new organizer.MagicCard("2",  1, ['earth']),
  new organizer.MagicCard("3",  3, ['earth','water']),
  new organizer.MagicCard("4",  2, ['earth','water']),
  new organizer.MagicCard("5",  2, ['earth','water']),
  new organizer.MagicCard("6",  2, ['earth']),
  new organizer.MagicCard("7",  3, ['earth']),
  new organizer.MagicCard("8",  3, ['fire']),
  new organizer.MagicCard("9",  3, ['fire']),
  new organizer.MagicCard("10", 5, ['fire','earth']),
  new organizer.MagicCard("11", 3, ['fire','earth']),
  new organizer.MagicCard("12", 5, ['fire','earth']),
  new organizer.MagicCard("13", 1, ['fire','earth']),
  new organizer.MagicCard("14", 1, ['fire','air']),
  new organizer.MagicCard("15", 1, ['fire','air']),
  new organizer.MagicCard("16", 4, ['fire','air']),
  new organizer.MagicCard("17", 3, ['fire']),
  new organizer.MagicCard("18", 3, ['water']),
  new organizer.MagicCard("19", 2, ['water']),
  new organizer.MagicCard("20", 1, ['water']),
  new organizer.MagicCard("21", 2, ['water','air']),
  new organizer.MagicCard("22", 2, ['water','air']),
  new organizer.MagicCard("23", 2, ['water','air']),
  new organizer.MagicCard("24", 5, ['water','air']),
  new organizer.MagicCard("25", 3, ['water','air']),
  new organizer.MagicCard("26", 3, ['water']),
  new organizer.MagicCard("27", 4, ['water']),
  new organizer.MagicCard("28", 5, ['water']),
  new organizer.MagicCard("29", 5, ['air']),
  new organizer.MagicCard("30", 1, ['air']),
  new organizer.MagicCard("31", 1, ['air']),
  new organizer.MagicCard("32", 1, ['air']),
  new organizer.MagicCard("33", 4, ['air']),
  new organizer.MagicCard("34", 5, ['air']),
  new organizer.MagicCard("35", 5, ['air','fire']),
  new organizer.MagicCard("36", 3, ['air','fire']),
  new organizer.MagicCard("37", 1, ['air','fire']),
  new organizer.MagicCard("38", 2, ['air','fire']),
  new organizer.MagicCard("39", 4, ['air']),
  new organizer.MagicCard("40", 5, ['air'])
];

organizer.render = function(model) {
  var html = [];
  html.push("<div class='model'><div style='padding: 3px'>");
  html.push("<p style='font-size:10px'>");
  html.push("<img src='lib-present-jquery-desktop-complete-case-img-m" + ((parseInt(model.id, 10) % 13) + 1) + ".jpg' width='85px' height='122px' >");
  html.push("</p></div></div>");
  return $(html.join(''));
};

organizer.SelectionManager = function() {
  this.selectionMap_ = {};
};

organizer.SelectionManager.prototype.select = function(id) {
  this.selectionMap_[id] = id;
  $('#' + id).addClass('ui-selected');
};

organizer.SelectionManager.prototype.unselect = function(id) {
  delete this.selectionMap_[id];
  $('#' + id).removeClass('ui-selected');
};    

organizer.SelectionManager.prototype.isSelected = function(id) {
  return this.selectionMap_[id];
};        

organizer.SelectionManager.prototype.allSelected = function() {
  return this.selectionMap_;
};
$sel = new organizer.SelectionManager();

organizer.start = function() {
  organizer.createModels();
  
  organizer.initDragSelection();
  
  organizer.initZooming();
  
  organizer.initPanning();
  
  organizer.initShuffleButton();
};

organizer.createModels = function() {
  jQuery.map(organizer.models, function(model) {
    var rendering = organizer.render(model);

    // initial positioning in the DOM and layout
    $(rendering).css("position", "absolute")
                .css("top", 0)
                .css("left", 0)
                .attr("id", model.id);

    $("#universe").append(rendering);    
  })
};

organizer.initDragSelection = function() {
  $('.model').dblclick(function() {
    if ($sel.isSelected(this.id)) {
      $sel.unselect(this.id);
    } else {
      $sel.select(this.id);
    }
  });      
  
  $('#container').selectable({
    selected: function(ev, ui) {
      if (ui.selected.id) {
        $sel.select(ui.selected.id);
      }
    },
    unselected: function(ev, ui) {
      if (ui.unselected.id) {
        $sel.unselect(ui.unselected.id);
      }
    },
    filter: '.model'
  });
  
  $('.model').draggable({
    opacity: 0.5,
    cursor: 'move',
    zIndex: 10000,
    start: function(ev, ui) {

      // figure out all the initial positions for the selected elements
      // and store them.
      if ($sel.isSelected(ui.helper[0].id)) {
        for (id in $sel.allSelected()) {
          $('#'+id).data(
            "top0", 
            parseInt($('#'+id).css("top"),10) - 
              parseInt($(ui.helper[0]).css("top"),10));
          $('#'+id).data(
            "left0", 
            parseInt($('#'+id).css("left"),10) - 
              parseInt($(ui.helper[0]).css("left"),10));
        }
      }
    },
    drag: function(ev, ui) {
      if ($sel.isSelected(ui.helper[0].id)) {
        for (id in $sel.allSelected()) {
          if (id != ui.helper[0].id) {
            $('#' + id).css('top',
                            $('#'+id).data("top0") + ui.position.top);
            $('#' + id).css('left', 
                            $('#'+id).data("left0") + ui.position.left);              
          }
        }
      }
    },
    stop: function(ev, ui) {
      if ($sel.isSelected(ui.helper[0].id)) {
        for (id in $sel.allSelected()) {
         $('#'+id).removeData("top0");
         $('#'+id).removeData("left0");
        }
      }        
    }
  });  
};
organizer.initZooming = function() {
  $('#container').mousewheel(function(event, delta) {
   
    var containerTopOffset = parseFloat($('#universe').css('top'));
    var containerLeftOffset = parseFloat($('#universe').css('left'));
    var scale = 0.1;
    var percent = 1 + delta*scale;        
    $('.model').each(function() {
      organizer.rescaleRelative(this, 
        'top', 
          event.clientY - 
          containerTopOffset - 
          parseFloat($(this).css('height')) / 2,
        percent);
      organizer.rescaleRelative(this, 
        'left', 
          event.clientX - 
          containerLeftOffset - 
          parseFloat($(this).css('width')) / 2, 
        percent);          
      
      organizer.rescale(this, 'width', percent);
      organizer.rescale(this, 'height', percent);
      organizer.rescale(this, 'font-size', percent);
    });
    
    $('.model IMG').each(function() {
      organizer.rescale(this, 'width', percent);
      organizer.rescale(this, 'height', percent);      
    });
    event.preventDefault();
  });  
};

organizer.rescale = function(selector, property, percent) {
  var oldValue = parseFloat($(selector).css(property));
  $(selector).css(property, oldValue*percent);
};

organizer.rescaleRelative = function(selector, property, relative, percent) {
  var oldValue = parseFloat($(selector).css(property)) - relative;
  $(selector).css(property, oldValue*percent + relative);      
};

organizer.initPanning = function() {
  var dragDelta = {
    top: $('#container').offset().top +
         $('#universe').offset().top,
    left: $('#container').offset().left +
          $('#universe').offset().left,
  };

  $('#scroll-trigger').click(function() {
    $(this).hide();
    var viewport = $('#container');
    $('#scroll-overlay')
      .css('left', viewport.css('left'))
      .css('top', viewport.css('top'))
      .css('width', viewport.width())
      .css('height', viewport.height())
      .css('z-index', 99)
      .css('display', '');

    $('#scroll-overlay').draggable({
      helper: function() {
        return $("<div />");
      },
      start: function(ev, ui) {
        var offset = $('#universe').offset();
        $('#universe')
          .data("top0", offset.top)
          .data("left0", offset.left);
      },
      drag: function(ev, ui) {
        var universe = $('#universe');
        var offset = universe.offset();

        var dragTop = ui.position.top +
                      universe.data("top0") - dragDelta.top;
        var dragLeft = ui.position.left +
                       universe.data("left0") - dragDelta.left;

        $('#universe')
          .css('top', dragTop).css('bottom', -dragTop)
          .css('left', dragLeft).css('right', -dragLeft);
      },
      refreshPositions: false
    });
  });

  $('#scroll-done').click(function() {
    $('#scroll-overlay')
      .css('z-index', -1)
      .css('display', 'none');
    $('#scroll-trigger').show();
  });  
};

organizer.initShuffleButton = function() {
  $('#shuffleCards').click(function() {
    // reset panning
    $('#universe').css('top', 0).css('left', 0).css('bottom', 0).css('right', 0);

    var maxWidth = Math.round($('#container').width()*0.3) ;
    var maxHeight = Math.round($('#container').height()*0.3);

    $('.model').each(function(model) {
      var top = Math.round($('#container').height() / 3 +
                           Math.random()*maxHeight*2 - maxHeight);
      var left = Math.round($('#container').width() / 3 +
                            Math.random()*maxWidth*2 - maxWidth);

      var movement = {'top': top, 'left': left};
      $(this).animate(movement, 1000);
    });    
  })
};