package{
	
	
	import flash.events.*;
	import flash.display.*;
	import flash.ui.*;
	
	/**
	 * This class is merely going to act as a tester for listening for specific keyboard input.
	 * It will form strings out of anything typed in between presses of "Return"
	 *
	 * IMPORTANT NOTE ABOUT TESTING THIS CLASS:  When testing it from the flash program, in the 
	 * player that pops up, you must select "Disable Keyboard Shortcuts" from the control menu
	 * or some of your keys will not register!
	 */
	public class CalendarTester extends MovieClip{
		
		var input:String = "";
		var year:int = -1;
		var month:int = -1;
		var day:int = -1;
		var haveValidYear:Boolean = false;
		var haveValidMonth:Boolean = false;
		var haveValidDay:Boolean = false;
		
		public function CalendarTester(){
			//this keyboard event listens for ANY key being pressed
			//NOT just for the down arrow.  KEY_UP listens for a key being released!
			this.stage.addEventListener(KeyboardEvent.KEY_DOWN, readKey);
			trace("Please enter a year.  It must be a positive number");
		}
		
		/**
		 * Keycode 13 is return, so if the user has entered that, they are done inputing their text.
		 * We can trace out what they entered, and clear the input string.
		 */
		public function readKey(e:KeyboardEvent):void{
			if(e.keyCode == 13){
				//check to see if they already entered a year.
				if(!haveValidYear){
					//parseInt is a function built into flash that attempts to convert a string to an int
					//for non numeric strings, it returns zero.
					if(this.checkYear(parseInt(input))){
						year = parseInt(input);
						input ="";
						haveValidYear = true;
						trace("Now please enter a month, in the form of a number");
					}else{
						trace("The year you entered, " + input + " is invalid.  Please enter a positive number");
						input = "";
					}
				}else if(!haveValidMonth){
					//fill this area in for month checking
				}else if(!haveValidDay){
					//fill this area in for day checking
					//if they enter a valid day, print out to them the year, month, and time entered.
					//then say "press enter to continue"
				}else{
					//this is where they have pressed enter to continue
					this.removeEventListener(KeyboardEvent.KEY_DOWN, readKey);
					this.printDate();
				}
			}else{
				input += String.fromCharCode(e.charCode);
			}
		}
		/**
		 * HOMEWORK:  Fill in this function so that it returns true only if y is an integer, greater than zero
		 */
		public function checkYear(y:int):Boolean{
			return true;
		}
		
		/**
		 * HOMEWORK:  Fill in this function so that it returns true only if m is an integer
		 * between (and including) 1-12.  Sorry, no Smarch on this calendar.
		 */
		public function checkMonth(m:int):Boolean{
			return true;
		}
		
		/**
		 * HOMEWORK: Fill in this function so that it returns true only if d is a valid day.  
		 * This means:
		 * - d must be an integer between 1-28
		 * - Check the entered month, to determine the upper bound for d, so that they date actually exists
		 * - if the year is a leap year, make sure that you consider that for February!
		 * remember, month and year are global variables, so you have access to them here.
		 * This function can make use of other functions, so you may want to save it until after you do them.
		 */
		public function checkDay(d:int):Boolean{
			return true;
		}
		
		/**
		 * HOMEWORK:  This function, when supplied with a month and year, will tell you how many days
		 * occur in that month, in that year (for leap year consideration).
		 */
		public function daysInMonth(m:int, y:int):int{
			return -1;
		}
		
		/**
		 * HOMEWORK: This function returns true if the year is a leap year.
		 * Make sure you do some research on leap years, it is not as simple as you might expect
		 */
		public function isLeapYear(y:int):Boolean{
			return false;
		}
		
		/**
		 * HOMEWORK: This function returns the month as a text string, based on the number
		 * Example:  if m is 1, it returns "January"
		 */
		public function getMonthName(m:int):String{
			return "";
		}
		
		/**
		 * HOMEWORK: This function returns the appropriate suffix for the day, to help in printing out the date.
		 * EG, if d is 15, it returns "th"
		 */
		public function getSuffix(d:int):String{
			return "";
		}
		
		/**
		 * HOMEWORK: This function returns nothing, but prints out the date as a string, using the global variables
		 * year, month, and day.  
		 * Example:   year = 2004, month = 4, day = 3
		 *   The program should print out "April 3rd, 2004"
		 */
		public function printDate():void{
			trace("print date");
		}
	}
}