package gui;

import java.awt.FlowLayout;
import java.util.ArrayList;
import java.util.List;

import javax.swing.BorderFactory;
import javax.swing.JPanel;

import grading.CompositeGrade;
import grading.Grade;
import grading.LeafGrade;

/**
 * A grouping of LeafGradeFields for a specific category of grades.
 */
public class CategoryField extends JPanel
{
  private static final long serialVersionUID = 1L;
  private List<LeafGradeField> fields;
  private CompositeGrade template;

  /**
   * @param template The CompositeGrade to use as a default key and value.
   */
  public CategoryField(final CompositeGrade template)
  {
    this.template = template;
    this.fields = new ArrayList<LeafGradeField>();
    setLayout(new FlowLayout(FlowLayout.LEFT));
    setBorder(BorderFactory.createTitledBorder(template.getKey()));

    for (Grade grade : template.getComponents())
    {
      if (grade instanceof LeafGrade)
      {
        LeafGradeField field = new LeafGradeField((LeafGrade) grade);
        fields.add(field);
        add(field);
      }
    }
  }

  /**
   * @return A new Grade object representing the composite grade of all fields in the category.
   */
  public Grade getGrade()
  {
    CompositeGrade grade = new CompositeGrade(getKey());
    grade.setFilter(template.getFilter());
    grade.setStrategy(template.getStrategy());
    fields.forEach((field) -> grade.add(field.getGrade()));

    return grade;
  }

  /**
   * @return The key for this category
   */
  public String getKey()
  {
    return template.getKey();
  }

  /**
   * Clears any text from all grades in this category.
   */
  public void reset()
  {
    fields.forEach((field) -> field.reset());
  }
}