/**
 * Class that represents a slide show.  A slide show has
 * an array of pictures, a time to wait between pictures,
 * and a title that is shown at the beginning of the show.
 * 
 * @author Barb Ericson 
 */
public class SlideShow
{
  ///////////// fields //////////////
  
  /** title for this slide show */
  private String title;
  
  /** the time to wait between pictures (in milliseconds) */
  private int waitTime = 2000; // default of 2 seconds
   
  /** the array of pictures to show */
  private Picture[] pictureArray;
  
  /////////////// constructors /////////
  
  /**
   * A no-argument constructor that takes
   * no parameters and leaves fields with their 
   * default values
   */
  public SlideShow() 
  {}
  
  /**
   * A constructor that takes just the title
   * @param theTitle the title to use
   */
  public SlideShow(String theTitle)
  {
    this.title = theTitle;
  }
  
  /**
   * A constructor that takes  
   * the array of pictures 
   * @param pictArray the array of pictures
   */
  public SlideShow(Picture[] pictArray)
  {
    this.pictureArray = pictArray;
  }
  
  /**
   * A constructor that takes the title and 
   * the array of pictures 
   * @param theTitle the title to use
   * @param pictArray the array of pictures
   */
  public SlideShow(String theTitle, 
                   Picture[] pictArray)
  {
    this.title = theTitle;
    this.pictureArray = pictArray;
  }
  
  /**
   * A constructor that takes 
   * the array of pictures, the wait
   * time, and the title
   * @param theTitle the title to use
   * @param pictArray the array of pictures
   */
  public SlideShow(Picture[] pictArray,
                   int theWaitTime,
                   String theTitle)
  {
    this.title = theTitle;
    this.waitTime = theWaitTime;
    this.pictureArray = pictArray;
  }
  
  /////////////// methods /////////////
  
  /**
   * Method to return the title 
   * @return the title or null if none
   */
  public String getTitle() { return this.title; }
  
  /**
   * Method to return the picture at the
   * passed index
   * @param index the index for the picture 
   * @return the picture at the index
   */
  public Picture getPicture(int index)
  {
    return this.pictureArray[index];
  }
  
  /**
   * Method to get the time to wait
   * between showing pictures 
   * @return the time to wait in milliseconds
   */
  public int getWaitTime() { return this.waitTime; }
  
  /**
   * Method to return the number of pictures
   * in this slide show
   * @return the number of pictures in the show 
   */
  public int getNumPictures() 
  {
    if (pictureArray == null)
      return 0;
    else
      return pictureArray.length;
  }
  
  /**
   * Method to set a picture at the passed
   * index
   * @param index which one to change
   * @param thePict the picture to use
   * @return true if success else return false
   */
  public boolean setPicture(int index, 
                            Picture thePict)
  {
    if (thePict != null && 
        pictureArray != null)
    {
      pictureArray[index] = thePict;
      return true;
    }
    else
      return false;
  }
  
  /**
   * Method to set the array of pictures
   * @param theArray the array to use
   * @return true if success else false
   */
  public boolean setPictureArray(Picture[] theArray)
  {
    if (pictureArray == null)
    {
      this.pictureArray = theArray;
      return true;
    }
    else
    {
      return false;
    }
  }
  
  /**
   * Method to set the title for this show
   * @param theTitle the title to use
   */
  public void setTitle(String theTitle)
  {
    this.title = theTitle;
  }
      
  /**
   * Method to return a string with information
   * about this object
   * @return a string with the object information
   */
  public String toString()
  {
    return "Slide show with title: " +
      this.title + ", wait time of: " +
      this.waitTime + " in milliseconds " +
      "and " + getNumPictures() + " pictures in it.";
  }
  
  /**
   * Method to show the slide show
   * @throws Exception 
   */
  public void show() throws Exception
  {
    // check that the picture array isn't null
    if (pictureArray != null)
    {
      
      // if the title isn't null show it
      if (title != null)
      {
        Picture titleP = new Picture(640,480);
        titleP.drawHorizontalCenteredString(title,240);
        titleP.show();
        Thread.sleep(this.waitTime);
        titleP.hide();
      }
      
      /** Loop through the pictures */
      for (Picture currPict : this.pictureArray)
      {
        currPict.show();
        Thread.sleep(waitTime);
        currPict.hide();
      }
    }
  }
  
  /**
   * Method to check if this slide show contains the passed
   * picture
   * @param p the picture to look for
   * @return true if found else false
   */
  public boolean contains(Picture p)
  {
     return Searcher.linearFind(p,this.pictureArray);
  }
  
  public static void main(String[] args) throws Exception
  {
    Picture p1 = new Picture(FileChooser.getMediaPath("beach.jpg"));
    Picture p2 = new Picture(FileChooser.getMediaPath("church.jpg"));
    Picture p3 = new Picture(FileChooser.getMediaPath("greece.jpg"));
    Picture[] pictArray = {p1,p2,p3};
    SlideShow show1 = new SlideShow("Vacation Pictures",pictArray);
    show1.show();
    System.out.println(show1);
    System.out.println(show1.contains(p1));
    Picture p4 = new Picture(FileChooser.getMediaPath("barbara.jpg"));
    System.out.println(show1.contains(p4));
  }
}