package {
	import mx.controls.Alert;
	
	public class student_twitter_flock_Tweet {
		private var dateStamp:String, id:String, text:String, screenName:String, profilePic:String;
		private var keywords:XMLList; 
		private var moods:Array, colors:Array, color:Array;
		private var emotions:Array;
		 
		public function student_twitter_flock_Tweet(data:XML, emotions:Array, colors:Array)	{
			this.dateStamp = data.created_at;
			this.id = data.id;
			this.text = data.text;
			this.keywords = data.keywords.keyword;
			this.screenName = data.user.screen_name;
			this.profilePic = data.user.profile_image_url;
			this.color = [0, 0, 0];
			
			this.emotions = emotions;
			this.colors = colors;
			
			extractEmotions();
		}
		
		public function extractEmotions ():void {
			// Goes through the message and finds the words that are associated
			// with certain emotions.

			var result:Array = [];
			var color:Array = [0.5, 0.5, 0.5];
			
			for(var i:int = 0; i < this.emotions.length; i++) {
				var found:Boolean = false;
				for(var j:int = 0; j < this.emotions[i].length; j++) {
					var item:XML;
					for each(item in this.keywords) { 
						if (!found && item.toString() == this.emotions[i][j]) {
							result[result.length] = this.emotions[i][0];
							found = true;
							
							color[0] += this.colors[i][0];
							color[1] += this.colors[i][1];
							color[2] += this.colors[i][2];
						} 
					} 
					if (found) break;
				}
			}
			if (result.length == 0) {
				result[0] = "unknown";
			}
			this.moods = result;
			
			this.color[0] = color[0] / result.length;
			this.color[1] = color[1] / result.length;
			this.color[2] = color[2] / result.length;
		}
		
		public function getMoods ():String {
			// Returns a string containing all the moods this tweet has been 
			// tagged with. Used for display purposes
			
			var result:String = "";
			for(var i:int = 0; i < this.moods.length; i++) {
				result += this.moods[i] + " ";
			}
			return result;
		}
		
		public function getText ():String {
			return this.text;
		}
		
		public function getScreenName ():String {
			return this.screenName;
		}
		
		public function getPic ():String {
			return this.profilePic;
		}
		
		public function getColor ():Array {
			return this.color;
		}
		
		public function calculateSimilarity (other:student_twitter_flock_Tweet):Number { 
			// Compares this tweet to the other one to see if they should be 
			// attracted to each other.

			if (this.id == other.id) { return 1; } 
			
			for(var i:int = 0; i < this.moods.length; i++) {
				if ( other.containsMood(this.moods[i]) ) {
					return 1.0;
				}
			}
			return 0.0;
		}
		
		public function containsMood (input:String):Boolean {
			// Returns true if this tweet has been tagged with the given mood, 
			// otherwise false. 

			for(var i:int = 0; i < this.moods.length; i++) {
				if (this.moods[i] == input) return true;
			}
			return false;
		}
	}
}