/*
 * One Click Upload - jQuery Plugin
 * Copyright (c) 2008 Michael Mitchell - http://www.michaelmitchell.co.nz
 */
(function($) {
   $.fn.upload = function(options) {
      /** Merge the users options with our defaults */
      options = $.extend({
         name: 'file',
         enctype: 'multipart/form-data',
         action: '',
         autoSubmit: true,
         onSubmit: function() { },
         onComplete: function() { },
         onSelect: function() { },
         params: {}
      }, options);

      return new $.ocupload(this, options);
   },

	$.ocupload = function(element, options) {

/* <MP> PATCH 10/10/2008 
var fixWidth = '150px';*/
var fixWidth = '80px';
var fixHeight = '24px';
/* ===================== */

	   /** Fix scope problems */
	   var self = this;

	   /** A unique id so we can find our elements later */
	   var id = new Date().getTime().toString().substr(8);

	   /** Upload Iframe */
	   var iframe = $(
			'<iframe ' +
				'id="iframe' + id + '" ' +
				'name="iframe' + id + '"' +
			'></iframe>'
		).css({
		   display: 'none'
		});

	   /** Form */
	   var form = $(
			'<form class="form-upload" ' +
				'method="post" ' +
				'enctype="' + options.enctype + '" ' +
				'action="' + options.action + '" ' +
				'target="iframe' + id + '"' +
			'></form>'
		).css({
		   margin: 0,
		   padding: 0
		});

	   /** File Input */
	   var input = $(
			'<input class="validation-excluded" ' +
				'name="' + options.name + '" ' +
				'type="file" ' +
			'/>'
		).css({
		   position: 'relative',
		   display: 'block',
		   marginLeft: -175 + 'px',
		   opacity: 0
		});

	   /** Put everything together */
	   element.wrap('<div></div>'); //container
	   form.append(input);
	   element.after(form);
	   element.after(iframe);

	   /** Find the container and make it nice and snug */
	   var container = element.parent().css({
	      position: 'relative',
	      //height: fixHeight, //element.outerHeight()+'px',
	      //width:  fixWidth,  //element.outerWidth() + 'px',
	      height: element.outerHeight()+2 + 'px',
	      width:  element.outerWidth() + 'px',
	      overflow: 'hidden',
	      cursor: 'pointer',
	      margin: 0,
	      padding: 0
	   });

	   /** Put our file input in the right place */
	   //input.css('marginTop', -container.height() - 10 + 'px');
	   input.css('marginTop', '-34px');

	   /** Move the input with the mouse to make sure it get clicked! */
	   container.mousemove(function(e) {
	      input.css({
	         top: e.pageY - container.offset().top + 'px',
	         left: e.pageX - container.offset().left + 'px'
	      });
	   });

	   /** Watch for file selection */
	   input.change(function() {
	      /** Do something when a file is selected. */
	      //self.onSelect();
/* <MP> PATCH 21/10/2008 */
         // Se la onSelect ritorna falso non prosegue!!!
         if (!self.onSelect())
            return false;
/* ===================== */	      

	      /** Submit the form automaticly after selecting the file */
	      if (self.autoSubmit) {
	         self.submit();
	      }
	   });

	   /** Methods */
	   $.extend(this, {
	      autoSubmit: true,
	      onSubmit: options.onSubmit,
	      onComplete: options.onComplete,
	      onSelect: options.onSelect,

	      /** get filename */
	      filename: function() {
	         return input.attr('value');
	      },

	      /** get/set params */
	      params: function(params) {
	         var params = params ? params : false;

	         if (params) {
	            options.params = $.extend(options.params, params);
	         }
	         else {
	            return options.params;
	         }
	      },

	      /** get/set name */
	      name: function(name) {
	         var name = name ? name : false;

	         if (name) {
	            input.attr('name', value);
	         }
	         else {
	            return input.attr('name');
	         }
	      },

	      /** get/set action */
	      action: function(action) {
	         var action = action ? action : false;

	         if (action) {
	            form.attr('action', action);
	         }
	         else {
	            return form.attr('action');
	         }
	      },

	      /** get/set enctype */
	      enctype: function(enctype) {
	         var enctype = enctype ? enctype : false;

	         if (enctype) {
	            form.attr('enctype', enctype);
	         }
	         else {
	            return form.attr('enctype');
	         }
	      },

	      /** set options */
	      set: function(obj, value) {
	         var value = value ? value : false;

	         function option(action, value) {
	            switch (action) {
	               default:
	                  throw new Error('[jQuery.ocupload.set] \'' + action + '\' is an invalid option.');
	                  break;
	               case 'name':
	                  self.name(value);
	                  break;
	               case 'action':
	                  self.action(value);
	                  break;
	               case 'enctype':
	                  self.enctype(value);
	                  break;
	               case 'params':
	                  self.params(value);
	                  break;
	               case 'autoSubmit':
	                  self.autoSubmit = value;
	                  break;
	               case 'onSubmit':
	                  self.onSubmit = value;
	                  break;
	               case 'onComplete':
	                  self.onComplete = value;
	                  break;
	               case 'onSelect':
	                  self.onSelect = value;
	                  break;
	            }
	         }

	         if (value) {
	            option(obj, value);
	         }
	         else {
	            $.each(obj, function(key, value) {
	               option(key, value);
	            });
	         }
	      },

	      /** Submit the form */
	      submit: function() {
	         /** Do something before we upload */
	         this.onSubmit();

	         /** add additional paramters before sending */
	         $.each(options.params, function(key, value) {
	            form.append($(
						'<input ' +
							'type="hidden" ' +
							'name="' + key + '" ' +
							'value="' + value + '" ' +
						'/>'
					));
	         });

	         /** Submit the actual form */
	         form.submit();

	         /** Do something after we are finished uploading */
	         iframe.unbind().load(function() {
	            /** Get a response from the server in plain text */
	            var myFrame = document.getElementById(iframe.attr('name'));
	            var response = $(myFrame.contentWindow.document.body).text();

	            /** Do something on complete */
	            self.onComplete(response); //done :D
	         });
	      }
	   });
	}
})(jQuery);