/*
    * Created on Apr 2, 2005 by davidson
    */
   package ca.spaz.cron.database;
   
   import java.util.*;
   
   import org.apache.log4j.Logger;
   
  import ca.spaz.cron.datasource.ILocalFoodDatasource;
  
  /***
   * Stores an amount and time of a food serving
   * 
   * @author davidson
   */
  public class Serving {
      /***
       * Logger for this class
       */
      private static final Logger logger = Logger.getLogger(Serving.class);
  
      private int ID = -1;
      
      private Food food;
  
      private double grams;
      private Measure measure = Measure.GRAM;
      
      private Date date;
  
      private int meal;
  
      public Serving() {}
      
      public Serving(Food f) {
          this(f, 1.0);
      }
  
      public Serving(Food f, double grams) {
          this.food = f;
          this.grams = grams;
          this.date = new Date(System.currentTimeMillis());
          this.meal = -1;
      }
  
      
      public double getGrams() {
          return grams;
      }
      
  
      public double getAmount() {
         assert(getMeasure() != null);
         return getGrams()/getMeasure().getGrams();
      }
  
  
      public void setAmount(double val) {
         assert(getMeasure() != null);
         // TODO: verify this is correct with measures that have Amount != 1
         setGrams(getMeasure().getGrams() * val);
      }
  
      public Food getFood() {
          return food;
      }
  
      public Date getDate() {
          return date;
      }
  
      public void setDate(Date d) {
          this.date = d;
      }
  
      /***
       * @return true if the object is already in the database
       */
      public boolean exists() {
          return ID != -1;
      }
  
      /***
       * Add the current food to the current day
       */
  /*    public void addToDatabase() {
          ILocalFoodDatasource lds = (ILocalFoodDatasource) getFood().getDataSource();
          lds.consumeFood(this);
      }
  */
      /***
       * Update the existing food information
       */
      public void updateDatabase() {
          ILocalFoodDatasource lds = (ILocalFoodDatasource) getFood().getDataSource();
          lds.changeServingAmount(this);
      }
  
     public void deleteFromDatabase() {
         ILocalFoodDatasource lds = (ILocalFoodDatasource) getFood().getDataSource();
         lds.removeServing(this);
     }
 
     public void setGrams(double amount) {
         this.grams = amount;
     }
 
     /***
      * @return the ID of the meal this serving was eaten at.
      */
     public int getMeal() {
         return meal;
     }
 
     /***
      * @return Returns the iD.
      */
     public int getID() {
         return ID;
     }
     /***
      * @param id The ID to set.
      */
     public void setID(int id) {
         ID = id;
     }
     /***
      * @return Returns the measure.
      */
     public Measure getMeasure() {
         return measure;
     }
     /***
      * @param measure The measure to set.
      */
     public void setMeasure(Measure measure) {
         this.measure = measure;
     }
     /***
      * @param meal The meal to set.
      */
     public void setMeal(int meal) {
         this.meal = meal;
     }
 
     /***
      * @param food
      */
     public void setFood(Food food) {
         this.food = food;
         // map existing measure to a matching measure in this food
         // this is a hack to work around converting from a food
         // in one datasource to another...
         if (food == null) return;
         List measures = getFood().getMeasures();
         if (measures == null) return;
         for (int i=0; i<measures.size(); i++) {
            Measure m = (Measure)measures.get(i);
            if (m == measure) return;
            if (m.getGrams() == measure.getGrams()) {
               if (m.getDescription().equals(measure.getDescription())) {
                  setMeasure(m);
               }
            }
         } 
     }
 
    public void setMeasure(int MID) {
       List measures = getFood().getMeasures();
       for (int i=0; i<measures.size(); i++) {
          Measure m = (Measure)measures.get(i);
          if (m.getID() == MID) setMeasure(m);
       }      
    }
 }