/*
 * simplyScroll 1.0.4 - a scroll-tastic jQuery plugin
 *
 * http://logicbox.net/jquery/simplyscroll
 * http://logicbox.net/blog/simplyscroll-jquery-plugin
 * http://plugins.jquery.com/project/simplyScroll
 *
 * Copyright (c) 2009 Will Kelly - http://logicbox.net
 *
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * Last revised: 03/07/2009 21:13
 *
 */
(function ($) {
	$.fn.simplyScroll = function (o) {
		return this.each(function () {
			new $.simplyScroll(this, o);
		});
	};
	var defaults = {className:"simply-scroll", frameRate:24, speed:1, horizontal:true, autoMode:"off", pauseOnHover:true, startOnLoad:false, localJsonSource:"", flickrFeed:"", jsonImgWidth:240, jsonImgHeight:180};
	$.simplyScroll = function (el, o) {
		var self = this;
		this.o = $.extend({}, defaults, o || {});
		this.auto = this.o.autoMode !== "off" ? true : false;
		this.$list = $(el);
		this.$list.addClass("simply-scroll-list").wrap("<div class=\"simply-scroll-clip\"></div>").parent().wrap("<div class=\"" + this.o.className + " simply-scroll-container\"></div>");
		if (!this.o.auto) {
			this.$list.parent().parent().prepend("<div class=\"simply-scroll-forward\"></div>").prepend("<div class=\"simply-scroll-back\"></div>");
		}
		if (this.o.flickrFeed) {
			$.getJSON(this.o.flickrFeed + "&format=json&jsoncallback=?", function (data) {
				json = [];
				$.each(data.items, function (i, item) {
					json.push({"src":item.media.m, "title":item.title, "link":item.link});
				});
				self.renderData(json);
			});
		} else {
			if (this.o.localJsonSource) {
				$.getJSON(this.o.localJsonSource, function (json) {
					self.renderData(json);
				});
			} else {
				if (!this.o.startOnLoad) {
					this.init();
				} else {
					$(window).load(function () {
						self.init();
					});
				}
			}
		}
	};
	$.simplyScroll.fn = $.simplyScroll.prototype = {};
	$.simplyScroll.fn.extend = $.simplyScroll.extend = $.extend;
	$.simplyScroll.fn.extend({init:function () {
		this.$items = this.$list.children();
		this.$clip = this.$list.parent();
		this.$container = this.$clip.parent();
		if (!this.o.horizontal) {
			this.itemMax = this.$items.eq(0).outerHeight(true);
			this.clipMax = this.$clip.height();
			this.dimension = "height";
			this.moveBackClass = "simply-scroll-btn-up";
			this.moveForwardClass = "simply-scroll-btn-down";
		} else {
			this.itemMax = this.$items.eq(0).outerWidth(true);
			this.clipMax = this.$clip.width();
			this.dimension = "width";
			this.moveBackClass = "simply-scroll-btn-left";
			this.moveForwardClass = "simply-scroll-btn-right";
		}
		this.posMin = 0;
		this.posMax = this.$items.length * this.itemMax;
		this.$list.css(this.dimension, this.posMax + "px");
		if (this.o.autoMode == "loop") {
			var addItems = Math.ceil(this.clipMax / this.itemMax);
			this.$items.slice(0, addItems).clone(true).appendTo(this.$list);
			this.posMax += (this.clipMax - this.o.speed);
			this.$list.css(this.dimension, this.posMax + (this.itemMax * addItems) + "px");
		}
		this.interval = null;
		this.intervalDelay = Math.floor(1000 / this.o.frameRate);
		while (this.itemMax % this.o.speed !== 0) {
			this.o.speed--;
			if (this.o.speed === 0) {
				this.o.speed = 1;
				break;
			}
		}
		var self = this;
		this.trigger = null;
		this.funcMoveBack = function () {
			self.trigger = this;
			self.moveBack();
		};
		this.funcMoveForward = function () {
			self.trigger = this;
			self.moveForward();
		};
		this.funcMoveStop = function () {
			self.moveStop();
		};
		this.funcMoveResume = function () {
			self.moveResume();
		};
		if (this.auto) {
			if (this.o.pauseOnHover) {
				this.$clip.hover(this.funcMoveStop, this.funcMoveResume);
			}
			this.moveForward();
		} else {
			this.$btnBack = $(".simply-scroll-back", this.$container).addClass("simply-scroll-btn" + " " + this.moveBackClass + " " + "disabled").hover(this.funcMoveBack, this.funcMoveStop);
			this.$btnForward = $(".simply-scroll-forward", this.$container).addClass("simply-scroll-btn" + " " + this.moveForwardClass).hover(this.funcMoveForward, this.funcMoveStop);
		}
	}, moveForward:function () {
		var self = this;
		this.movement = "forward";
		if (this.trigger !== null) {
			this.$btnBack.removeClass("disabled");
		}
		self.interval = setInterval(function () {
			if (!self.o.horizontal && self.$clip[0].scrollTop < (self.posMax - self.clipMax)) {
				self.$clip[0].scrollTop += self.o.speed;
			} else {
				if (self.o.horizontal && self.$clip[0].scrollLeft < (self.posMax - self.clipMax)) {
					self.$clip[0].scrollLeft += self.o.speed;
				} else {
					if (self.o.autoMode == "loop") {
						self.resetPos();
					} else {
						self.moveStop(self.movement);
					}
				}
			}
		}, self.intervalDelay);
	}, moveBack:function () {
		var self = this;
		this.movement = "back";
		if (this.trigger !== null) {
			this.$btnForward.removeClass("disabled");
		}
		self.interval = setInterval(function () {
			if (!self.o.horizontal && self.$clip[0].scrollTop > 0) {
				self.$clip[0].scrollTop -= self.o.speed;
			} else {
				if (self.o.horizontal && self.$clip[0].scrollLeft > 0) {
					self.$clip[0].scrollLeft -= self.o.speed;
				} else {
					if (self.o.autoMode == "loop") {
						self.resetPos();
					} else {
						self.moveStop(self.movement);
					}
				}
			}
		}, self.intervalDelay);
	}, moveStop:function (moveDir) {
		clearInterval(this.interval);
		if (this.trigger !== null) {
			if (typeof moveDir != "undefined") {
				$(this.trigger).addClass("disabled");
			}
			this.trigger = null;
		}
		if (this.auto) {
			if (this.o.autoMode == "bounce") {
				moveDir == "forward" ? this.moveBack() : this.moveForward();
			}
		}
	}, moveResume:function () {
		this.movement == "forward" ? this.moveForward() : this.moveBack();
	}, resetPos:function () {
		if (!this.o.horizontal) {
			this.$clip[0].scrollTop = 0;
		} else {
			this.$clip[0].scrollLeft = 0;
		}
	}, renderData:function (json) {
		if (json.length > 0) {
			var self = this;
			$.each(json, function (i, item) {
				$("<img/>").attr({src:item.src, title:item.title, alt:item.title, width:self.o.jsonImgWidth, height:self.o.jsonImgHeight}).appendTo(self.$list);
			});
			this.init();
		}
	}});
})(jQuery);