/************************************************************************
*************************************************************************
@Name :       	QapTcha - jQuery Plugin
@Revison :    	3.0
@Date : 		20/09/2011
@Author:     	 ALPIXEL - (www.myjqueryplugins.com - www.alpixel.fr) 
@License :		 Open Source - MIT License : http://www.opensource.org/licenses/mit-license.php
 
**************************************************************************
*************************************************************************/
jQuery.QapTcha = {
    build: function (options) {
        var defaults = {
            txtLock: 'Formulario Bloqueado : Deslice la barra para comprobar que Vd. es humano.',
            txtUnlock: 'Formulario Desbloqueado : El formulario puede ser enviado',
            disabledSubmit: true,
            autoRevert: false,
            PHPfile: '/Home/Qaptcha'
        };

        if (this.length > 0)
            return jQuery(this).each(function (i) {
                /** Vars **/
                var 
				opts = $.extend(defaults, options),
				$this = $(this),
				form = $('form').has($this),
				Clr = jQuery('<div>', { 'class': 'clr' }),
				bgSlider = jQuery('<div>', { id: 'bgSlider' }),
				Slider = jQuery('<div>', { id: 'Slider' }),
				Icons = jQuery('<div>', { id: 'Icons' }),
				TxtStatus = jQuery('<div>', { id: 'TxtStatus', 'class': 'dropError', text: opts.txtLock }),
				inputQapTcha = jQuery('<input>', { name: 'iQapTcha', value: generatePass(), type: 'hidden' });

                var onclickEvt;
                /** Disabled submit button **/
                if (opts.disabledSubmit) {
                    //form.find('input[type=\'submit\']').attr('disabled', 'disabled');
                    onclickEvt = form.find('input[type=\'submit\']').attr('onclick');
                    form.find('input[type=\'submit\']').attr('onclick', 'alert("Debe desbloquear el formulario para poder enviar el formulario"); return false;');
                }

                /** Construct DOM **/
                bgSlider.appendTo($this);
                Icons.insertAfter(bgSlider);
                Clr.insertAfter(Icons);
                TxtStatus.insertAfter(Clr);
                inputQapTcha.appendTo($this);
                Slider.appendTo(bgSlider);
                $this.show();

                Slider.draggable({
                    revert: function () {
                        if (opts.autoRevert) {
                            if (parseInt(Slider.css("left")) >= 46) return false;
                            else return true;
                        }
                    },
                    containment: bgSlider,
                    axis: 'x',
                    stop: function (event, ui) {

                        if (ui.position.left >= 46) {
                            // set the SESSION iQaptcha in PHP file
                            var token = generatePass();
                            $.post(opts.PHPfile, {
                                action: 'qaptcha' + '|' + token
                            },
						function (data) {

						    if (!data.error) {
						        Slider.draggable('disable').css('cursor', 'default');
						        inputQapTcha.val(token);
						        TxtStatus.text(opts.txtUnlock).addClass('dropSuccess').removeClass('dropError');
						        Icons.css('background-position', '-16px 0');
						        //form.find('input[type=\'submit\']').removeAttr('disabled');
						        form.find('input[type=\'submit\']').attr('onclick', onclickEvt);
						    }
						}, 'json');
                        }
                    }
                });

                function generatePass() {
                    var chars = 'azertyupqsdfghjkmwxcvbn23456789AZERTYUPQSDFGHJKMWXCVBN';
                    var pass = '';
                    for (i = 0; i < 10; i++) {
                        var wpos = Math.round(Math.random() * chars.length);
                        pass += chars.substring(wpos, wpos + 1);
                    }
                    return pass;
                }

            });
    }
};       jQuery.fn.QapTcha = jQuery.QapTcha.build;