package {
    import flash.display.*;
    import flash.events.*;
    import flash.utils.*;
          
    // The main application class for a child's learn-to-read game 
    // demonstrating the basic usage of namespaces in ActionScript.
    // The player is shown a picture of a color or a fruit, and asked to 
    // choose its name from a list of options.
    public class @ax-actionscript-misc-KidsGame extends Sprite {
      private var gameItems:Items;  // The list of all items in the game
      private var thisQuestionItem:Item; // The item for each question
      private var questionScreen:QuestionScreen;  // The user interface
  
      // Constructor
      public function @ax-actionscript-misc-KidsGame() {
        // Retrieve the game items (the fruits and colors which the user must 
        // name)
        gameItems = new actionscript_misc_Items();
        // Display the first question
        newQuestion();
      }
  
      // Creates and displays a new random game question
      public function newQuestion ():void {
        // Get the full list of item types (an array of namespaces)
        var itemTypes:Array = gameItems.getItemTypes();
        // Pick a random item type (one of the namespaces in itemTypes)
        var randomItemType:Namespace = itemTypes[Math.floor(
                                       Math.random()*itemTypes.length)];
  
                
        // Retrieve the randomly chosen item set
        var items:Array = gameItems.randomItemType::getItems();
      
        // Randomly pick the item for this question from the item set
        thisQuestionItem = items[Math.floor(Math.random()*items.length)];
      
        // Remove the previous question, if there was one
        if (questionScreen != null) {
          removeChild(questionScreen);
        }
        
        // Display the new question
        questionScreen = new QuestionScreen(this, items, thisQuestionItem);
        addChild(questionScreen);
      }
                  
      // Handles a player's guess
      public function submitGuess (guess:int):void {
        trace("Guess: " + guess + ", Correct: " + thisQuestionItem.id);
        if (guess == thisQuestionItem.id) {
          questionScreen.displayResult("Correct!");
          // Disable the answer buttons while the 
          // player waits for the next question.
          questionScreen.disable();
          // Wait 3 seconds then show another question.
          var timer:Timer = new Timer(3000, 1);
          timer.addEventListener(TimerEvent.TIMER, doneResultDelay);
          timer.start();
        } else {
          questionScreen.displayResult("Incorrect. Please try again.");
        }
      }
      
      // Makes a new question after the previous question is finished.
      private function doneResultDelay (e:TimerEvent):void {
        newQuestion();
      }
    }
  }