package downey.hw1;
import java.io.Serializable;
import java.util.ArrayList;

/**
 *The required record to use in Hw1
 *
 *@author Tim Downey
 *@version 08/29/04
 */
public class Hw1Record implements Serializable, Cloneable
{
    // instance variables
    private double price;
    private int quantity;
    private String isbn;
    private String author;
    private ArrayList optionList;

    /**
     *Default constructor for objects of class Hw1Record
     */
    public Hw1Record()
    {
        // call constructor with String argument
        this("");
    }

    /**
     *Constructor for objects of class Hw1Record with a String argument
     *
     *@param isbn The String isbn for this record
     */
    public Hw1Record(String isbn)
    {
        // initialise instance variables
        quantity = 0;
        price = 0.0;
        this.isbn = isbn;
        author = "";
        optionList = new ArrayList();
    }

    /**
     *setQuantity - set the quantity for this book
     *
     *@param  quantity  the quantity of the book
     */
    public void setQuantity(int quantity)
    {
        this.quantity = quantity;
    }
    
     /**
     *getQuantity - get the quantity for this book
     *
     *@return     the quantity of the book as an int
     */
    public int getQuantity()
    {
        return quantity;
    }
 
    /**
     *getPrice - set the price for this book
     *
     *@param  price  the price of the book as a double
     */
    public void setPrice(double price)
    {
        this.price = price;
    }
    
    /**
     *getPrice - get the price for this book
     *
     *@return     the price of the book as a double
     */
    public double getPrice()
    {
        return price;
    }
    
    /**
     *setIsbn - set the isbn for this book
     *
     *@param  isbn  the isbn of the book as a String
     */
    public void setIsbn(String isbn)
    {
        this.isbn = isbn;
    }
    
     /**
     *getIsbn - get the isbn for this book
     *
     *@return     the isbn of the book as a String
     */
    public String getIsbn()
    {
        return isbn;
    }
    
     /**
     *getAuthor - get the author for this book
     *
     *@return     the author of the book as a String
     */
    public String getAuthor()
    {
        return author;
    }
    
   /**
     *Set the author for the record
     *
     *@param author The author as a String
     */
    public void setAuthor(String author)
    {
        this.author = author;
    }
    
    /**
     *displayTable - display the data on separate lines
     *
     */
    public void displayTable() {
        String result = "";
        String spacer = "\n";
        result += "\nISBN: " + getIsbn() +
        	spacer + "Author: " + getAuthor() + 
        	spacer + "Quantity: " + getQuantity() + 
        	spacer + "Price: " + getPrice();
        result += listOption(spacer) + "\n";
        System.out.println(result);
    }
    
    /**
     *displayRow - display the data on one line
     *
     */
    public void displayRow() {
        System.out.println(listRecord("\t"));
    }
    
    /*Helper method to display the record data.
     *The 'spacer' determines the appearance of the data.
     *"\n" to get separate lines
     *"\t" to get one line
     *Creative tricks can be played, like using "<td>" to get HTML
     *
     */
    private String listRecord(String spacer) {
        String result = "";
        result += getIsbn() +
        	spacer + getAuthor() + 
        	spacer + getQuantity() + 
        	spacer + getPrice();
        result += listOption(spacer) + "\n";
        return result;
    }
    
    /*Helper method to list the options in a comma separated list
     *
     */
    private String listOption(String firstSpacer) {
        String result = "";
        String option[] = getOption();
        String spacer = firstSpacer + "Options: ";
        if (option == null) return result;
        for(int i=0; i<option.length; i++) {
            if (option[i] != null) {
                result += spacer + option[i];
                spacer = ", ";
            }
        }   
        return result;
    }
    
    /*Helper method to place an option at a particular position.
     *If the list is not as big as the index, then a new position is added.
     *If the position already has data, then the old data is altered.
     *If the index is -1, then the option is added to the end of the list.
     */
    private void setList(int i, String option) {
      if (optionList == null) optionList = new ArrayList();
      if (i < 0) {
        i = optionList.size();
      }
      try {
          if (this.optionList.size() <= i || this.optionList.get(i) == null) {
              this.optionList.add(i, option);
          } else {
              this.optionList.set(i, option);
          }
      } catch (Exception e) {
          System.out.println("setList exception: " + e);
      }
  }
  
    /*Helper method to retrieve data from a specific position
     *
     */
  private String getList(int i) {
      if (optionList == null) return null;
      try {
          if (this.optionList.size() <= i || this.optionList.get(i) == null) {
              return null;
          } else {
              return (String) this.optionList.get(i);
          }
      } catch (Exception e) {
          System.out.println("getList exception: " + e);
      }
      return null;
  }
   
  /**Set all the options at once
   *
   *@param option The String[] that contains all the new options
   *
   */
  public void setOption(String[] option) {
      if (option == null) return;
      for (int i=0; i<option.length; i++) {
        setList(i, option[i]);
      }
  }
  
  /**Set a single option
   *
   *@param option the String that is the new option
   *
   */
  public void setOption(int i, String option) {
      setList(i, option);
  }
  
  /**Retrieve all the options as a String[]
   *
   *@return The String[] that contains all of the options
   *
   */
  public String[] getOption() {
      if (optionList == null) return null;
      return (String[]) optionList.toArray(new String[0]);
  }
    
  /**Retrieve a single option at a given position
   *
   *@param i The index of the option in the list
   *@return The option as a String
   */
  public String getOption(int i) {
      return(getList(i));
  }
  
  /**Remove a single option at a given position
   *
   *@param i The index of the option to remove
   *
   */
  public void removeOption(int i) {
    if (optionList == null || optionList.size() == 0) return;
    if (i >= 0 && i < optionList.size()) {
        optionList.remove(i);    
    }
  }

  /**Remove all the options from the list
   *
   */
  public void removeOption() {
    if (optionList == null || optionList.size() == 0) return;
    optionList.clear();
  }
  
  public Object clone() {
    try {
        Hw1Record rec = (Hw1Record) super.clone();
        rec.optionList = (ArrayList) optionList.clone();
        return rec;
    } catch (CloneNotSupportedException e) {
        System.out.println("Clone not supported, returning a null Hw1Record\n");
        return null;
    }
  }
}