class DynamicGridColumn
  
  def self.build_column(field_hash, options={})
    field_hash.symbolize_keys!
    header = (field_hash[:header] ? field_hash[:header] : field_hash[:fieldLabel])
    type = (field_hash[:type] ? field_hash[:type] : DynamicGridColumn.convert_xtype_to_column_type(field_hash[:xtype]))
    data_index = (field_hash[:dataIndex] ? field_hash[:dataIndex] : field_hash[:name])
    sortable = (field_hash[:sortable].nil? ? true : field_hash[:sortable])
    renderer = (type == 'date' ? "Ext.util.Format.dateRenderer('m/d/Y')" : '')
    
    col = {
      :header => header,
      :type => type,
      :dataIndex => data_index,
      :sortable => sortable
    }

    col[:width] = field_hash[:width] unless field_hash[:width].nil?
    col[:renderer] = renderer unless renderer.blank?

    if field_hash[:editor]
      selections = (field_hash[:editor][:store] ? field_hash[:editor][:store] : [])
      col[:editor] = DynamicFormField.basic_field(field_hash[:editor][:xtype], field_hash[:editor], selections)
    end    
    
    col.to_json
  end
  
  def self.build_delete_column(action='')
    action = "var messageBox = Ext.MessageBox.confirm(
      'Confirm', 'Are you sure?', 
      function(btn){
        if (btn == 'yes'){ 
          #{action}               
        }
      });"    
    DynamicGridColumn.build_action_column("Delete", "/images/icons/delete/delete_16x16.png", action)
  end
  
  def self.build_view_column(action='')    
    DynamicGridColumn.build_action_column("View", "/images/icons/document_view/document_view_16x16.png", action)
  end

  def self.build_edit_column(action='')    
    DynamicGridColumn.build_action_column("Edit", "/images/icons/document_edit/document_edit_16x16.png", action)
  end
  
  def self.build_action_column(header, icon, action)    
    col = '{
        "menuDisabled":true,
        "resizable":false,
        "xtype":"actioncolumn",
        "header":"'+header+'",
        "align":"center",
        "width":50,
        "items":[{
            "icon":"'+icon+'",
            "tooltip":"'+header+'",
            "handler" :function(grid, rowIndex, colIndex){
                var rec = grid.getStore().getAt(rowIndex);
                '+action+'
            }
        }]
    }'
    
    col
  end
  
  def self.convert_xtype_to_column_type(xtype)
    case xtype
    when 'textfield'
      return 'string'
    when 'datefield'
      return 'date'
    when 'textarea'
      return 'string'
    when 'numberfield'
      return 'number'
    when 'actioncolumn'
      return 'actioncolumn'
    else
      return 'string'
    end
  end
  
end