/*
 * swiper smooth progress 1.1.0
 * smooth progress plugin for swiper
 *
 * http://www.idangero.us/sliders/swiper/plugins/progress.php
 *
 * copyright 2010-2014, vladimir kharlampidi
 * the idangero.us
 * http://www.idangero.us/
 *
 * licensed under gpl & mit
 *
 * released on: january 29, 2014
*/
swiper.prototype.plugins.progress = function(swiper, params) {
	var ish = swiper.params.mode == 'horizontal';
	var wrappermaxposition;
	function initslides(){
		for (var i=0; i<swiper.slides.length; i++) {
			var slide = swiper.slides[i];
			slide.progressslidesize = ish ? swiper.h.getwidth(slide) : swiper.h.getheight(slide);
			if ('offsetleft' in slide) {
				slide.progressslideoffset = ish ? slide.offsetleft : slide.offsettop;
			}
			else {
				slide.progressslideoffset = ish ? slide.getoffset().left - swiper.h.getoffset(swiper.container).left : slide.getoffset().top - swiper.h.getoffset(swiper.container).top;
			}
		}
		if (ish) {
			wrappermaxposition = swiper.h.getwidth(swiper.wrapper) + swiper.wrapperleft + swiper.wrapperright - swiper.width;
		}
		else {
			wrappermaxposition = swiper.h.getheight(swiper.wrapper) + swiper.wrappertop + swiper.wrapperbottom - swiper.height;
		}
	}
	function calcprogress(transform) {
		var transform = transform || {x:0, y:0, z:0};
		var offsetcenter;
		if(swiper.params.centeredslides==true) offsetcenter = ish ? -transform.x+swiper.width/2 : -transform.y+swiper.height/2 ;
		else offsetcenter = ish ? -transform.x : -transform.y ;
		//each slide offset from offset center
		for (var i=0; i<swiper.slides.length; i++) {
			var slide = swiper.slides[i];
			var slidecenteroffset = (swiper.params.centeredslides==true) ? slide.progressslidesize/2 : 0;

			var offsetmultiplier = (offsetcenter - slide.progressslideoffset - slidecenteroffset)/slide.progressslidesize;
			slide.progress = offsetmultiplier;

		}
		// global swiper progress
		swiper.progress = ish ? -transform.x/wrappermaxposition : -transform.y/wrappermaxposition;
		// callback
		if(swiper.params.onprogresschange) swiper.firecallback(swiper.params.onprogresschange,swiper);
	}

	//plugin hooks
	var hooks = {
		onfirstinit : function(args){
			initslides()
			calcprogress({
				x: swiper.getwrappertranslate('x'),
				y: swiper.getwrappertranslate('y')
			});
		},
		oninit : function(args) {
			initslides()
		},
		onsetwrappertransform: function(transform){
			calcprogress(transform);
		}
	}
	return hooks
}