package edu.calpoly.cpe205.fetter;
import javax.swing.*;
import java.util.*;
import java.io.*;
import java.lang.reflect.*;
import java.lang.*;
import java.awt.*;
import javax.swing.event.*;
import java.awt.event.*;


/**
 * This class is used by the InstantiateClassDialog to hold the GUI components
 * used to display a visual representation of a constructor and its 
 * parameters.
 * 
 * @see InstantiateClassDialog
 */
 // Author: Michael Hebron
 // Version History:
 //    Nov 21, 2000 - comments and pseudo code first added
 //    Nov 30, 2000 - update class description, made class public
 //    Jan 17, 2001 - (Jonathon Lee) - added ETA.out calls to all functions and calls to non-jdk2 classes per pseudocode
 //    Feb 10, 2001 - (Jonathon Lee) - updated to coding standards

public class ConstructorRow
{
    /**
     * Creates a new instance of a ConstructorRow
     * <p>
     * Pre-conditions: The ParameterObjectComboBoxes in <code>values<code>
     * must already be set up as ParameterDataListeners on the model<br>
     * Post-conditions: The fields of the ConstructorRow become initialized
     * @param constructorName A JRadioButton whose name is that of a constructor in
     * the form <br>
     * <i>ObjectName</i>:(<i>Type, Type, ...</i>)
     * @param values an array of ParameterObjectComboBoxes representing parameters
     * for a constructor
     */
    public ConstructorRow(JRadioButton constructorName, ParameterObjectComboBox[] values)
    {
        // SET constructorButton to constructorName
        // SET parameterValues to values
        // CALL addChangeListener of constructorButton with NEW ParameterEnabler
        // CALL setSelected of constructorButton with false
        constructorButton = constructorName;
        parameterValues = values;
        constructorButton.addChangeListener(new ParameterEnabler());
        constructorButton.setSelected(false);
    }


    /**
     * Returns the selected ParameterDataInterfaces from the
     * ParameterObjectComboBoxes
     * <p>
     * Pre-conditions: <code>isAllSelected</code> should be called before this
     * function to make sure that valid ParameterDataInterfaces are returned
     * @return the selected ParameterDataInterfaces from the
     * ParameterObjectComboBoxes, <code>null</code> if the constructor has
     * no parameters
     */
    public ParameterDataInterface[] getParameterValues()
    {
        ParameterDataInterface pdiArray[];  // array that this function returns
        
        // IF length of parameterValues = 0 THEN
        //    INITIALIZE pdiArray as NEW array of ParameterDataInterface with length of 0

        /* set the array to zero if there are no values, otherwise set values */
        if (parameterValues.length == 0)
        {
            pdiArray = new ParameterDataInterface[0];
        }

        // ELSE
        //    INITIALIZE pdiArray as NEW array of ParameterDataInterface with length of parameterValues
        //    FOR x = 0 to length of parameterValues - 1
        //       CALL getSelectedItem of parameterValues[x] returns pdi
        //       SET pdiArray[x] to pdi
        //    ENDFOR
        // ENDIF
        else
        {
            pdiArray = new ParameterDataInterface[parameterValues.length];
            
            /* set the array items to each of the values */
            for (int x = 0; x < parameterValues.length; x++)
            {
                pdiArray[x] = (ParameterDataInterface) parameterValues[x].getSelectedItem();
            }
        }
    
        // RETURN pdiArray
        return pdiArray;
    }


    /**
     * Checks to see if all of the ParameterObjectComboBoxes have valid Test Data
     * Items selected.
     * <p>
     * Pre-conditions: none<br>
     * Post-conditions: none
     * @return <code>true</code> if all valid Test Data Items have been selected,
     * <code>false</code> if otherwise.
     */
    public boolean isAllSelected()
    {
        // IF length of parameterValues = 0 THEN
        //  RETURN true
       
        /* exit if there aren't any values */
        if (parameterValues.length == 0)
        {
            return true;
        }
          
        // CALL getLength of parameterValues returns i
        // FOR x = 0 to i - 1
        //    IF getSelectedIndex of parameterValues[x] = 0 THEN
        //       RETURN false
        //    ENDIF
        // ENDFOR
      
        /* for each value */
        for (int x = 0; x < parameterValues.length; x++)
        {    
            /* exit if no value is selected */
            if (parameterValues[x].getSelectedIndex() == 0)
            {
                return false;
            }
        }
 
        // RETURN true
        return true;
    }


    /**
     * Returns a reference to the radio button used to display the name of a
     * constructor
     * <p>
     * @return a reference to the radio button for a constructor
     */
    public JRadioButton getConstructorButton()
    {
        // RETURN constructorButton
        return constructorButton;
    }


    /**
     * The ParameterObjectComboBoxes used to represent the parameters
     * for a constructor
     */
    protected ParameterObjectComboBox[] parameterValues;

    /**
     * A JRadioButton used to display the name of a constructor
     */
    protected JRadioButton constructorButton;



    /**
     * This class is used by the ConstructorRow to listen to the constructorButton
     * and enable or disable all of the
     * ParameterObjectComboBoxes associated with the parameters for the constructor
     */
    protected class ParameterEnabler implements ChangeListener
    {
        /**
         * Enables or disables all of the ParameterObjectComboBoxes for a 
         * constructor, depending on whether the source of the event
         * (<code>constructButton</code>) is selected
         * Pre-condition: The source of the action event must be <code>
         * constructButton</code>
         */
        public void stateChanged(ChangeEvent evt)
        {
            // CALL getSource of evt returns consButton
            // CALL isSelected of consButton returns enable
            // FOR x = 0 to length of parameterValues - 1
            //    CALL setEnabled of parameterValues[x] with enable
            // ENDFOR
            JRadioButton consButton = (JRadioButton) evt.getSource();  // the row to check
            boolean enable = consButton.isSelected();  // is the button selected 
            
            /* enable or disable each combo box */
            for (int x = 0; x < parameterValues.length; x++)
            {
                parameterValues[x].setEnabled(enable);
            } // end for
        } // end inner class function
    } // end inner class
} // end class