/* Green Heroes */

function People(container,options) {

	// set the defaults
	this.element = $(container);
	this.current = 0;
	this.speed = typeof options.speed == 'undefined' ? 2 : options.speed;
	this.columns = $(container).down().childElements().length;
	this.visible = 3;
	this.width = 145;
	this.element.down().setStyle({'width':this.columns*this.width+'px'});
	
	// add the on click events
	this.menu();
	
}

People.prototype.menu = function() {

	if (this.columns <= this.visible) {
	
		$('people_next').remove();
		$('people_prev').remove();
		
	} else {

		// set the button actions
		$('people_next').observe("click", function(event) {
			this.move('next');
		}.bind(this)); 
		
		$('people_prev').observe("click", function(event) {
			this.move('prev');
		}.bind(this));
		
	}
	
}

People.prototype.move = function(direction) {

	if (direction == 'next') {	
	
		if (this.current+this.visible < this.columns) {
			
			var move = this.visible;
			var remaining  = this.columns - this.current - move;
			
			if (move > remaining) {
				move = remaining;
			}
					
			if (remaining <= this.visible) {
				$('people_prev').removeClassName('fade');
				$('people_next').addClassName('fade');
			} else {
				$('people_prev').removeClassName('fade');
				$('people_next').removeClassName('fade');
			}
			
			if (move > this.visible) {
				move = this.current+this.visible;
			} else {
				move = this.current+move;
			}		
			
			this.current = move;
			
			new Effect.Move ( this.element.down(), { "x": -((move)*this.width), "y": 0, "mode": "absolute", "duration": this.speed } );
			
		}
			
	} else {
	
		if (this.current >= 0) {
	
			var move = this.visible;

			if (this.current - move > 0) {
				$('people_prev').removeClassName('fade');
				$('people_next').removeClassName('fade');
				move = this.current-this.visible;
			} else {
				$('people_prev').addClassName('fade');
				$('people_next').removeClassName('fade');
				move = 0;
			}
			
			this.current = move;
			
			new Effect.Move ( this.element.down(), { "x": -((move)*this.width), "y": 0, "mode": "absolute", "duration": this.speed } );
			
		}
	}
}




/* twitter */

function twitterCallback(twitters) {
  var statusHTML = [];
  for (var i=0; i<twitters.length; i++){
    var username = twitters[i].user.screen_name;
    var status = twitters[i].text.replace(/((https?|s?ftp|ssh)\:\/\/[^"\s\<\>]*[^.,;'">\:\s\<\>\)\]\!])/g, function(url) {
      return '<a href="'+url+'">'+url+'</a>';
    }).replace(/\B@([_a-z0-9]+)/ig, function(reply) {
      return  reply.charAt(0)+'<a href="http://twitter.com/'+reply.substring(1)+'">'+reply.substring(1)+'</a>';
    });
    statusHTML.push('<li><span>'+status+'</span> <a class="date" href="http://twitter.com/'+username+'/statuses/'+twitters[i].id+'">'+relative_time(twitters[i].created_at)+'</a></li>');
  }
  document.getElementById('twitter_update_list').innerHTML = statusHTML.join('');
}

function relative_time(time_value) {
  var values = time_value.split(" ");
  time_value = values[1] + " " + values[2] + ", " + values[5] + " " + values[3];
  var parsed_date = Date.parse(time_value);
  var relative_to = (arguments.length > 1) ? arguments[1] : new Date();
  var delta = parseInt((relative_to.getTime() - parsed_date) / 1000);
  delta = delta + (relative_to.getTimezoneOffset() * 60);

  if (delta < 60) {
    return 'less than a minute ago';
  } else if(delta < 120) {
    return 'about a minute ago';
  } else if(delta < (60*60)) {
    return (parseInt(delta / 60)).toString() + ' minutes ago';
  } else if(delta < (120*60)) {
    return 'about an hour ago';
  } else if(delta < (24*60*60)) {
    return 'about ' + (parseInt(delta / 3600)).toString() + ' hours ago';
  } else if(delta < (48*60*60)) {
    return '1 day ago';
  } else {
    return (parseInt(delta / 86400)).toString() + ' days ago';
  }
}