package org.opensync.schedule;
   
   import java.io.*;
   import java.util.*;
   import java.text.*;
   
   
   /***
    * This class reprsents a entry of the scheduler
   * 
   * @author	SOFTMED
   */
  public class SchedulerEntry implements Serializable, Comparable {
    /***
     * The date
     * 
     */
    protected Date date;
    /***
     * The hour
     * 
     */
    protected int hour = 0;
    /***
     * The minute
     * 
     */
    protected int minute = 0;
    /***
     * The day of week
     * 
     */
    protected int dayOfWeek = -1;
    /***
     * The day of month
     * 
     */
    protected int dayOfMonth = -1;
  
    /***
     * The runnable object to start
     * 
     */
    private Runnable runnable;
    /***
     * The real time
     * 
     * 	
     */
    private long time;
    /***
     * Is a time scheduling
     * 
     */
    private boolean timeSchedule;
    /***
     * The name of the entry
     * 
     */
    private String name;
  
    /***
     * Construct a schedule entry
     * 
     * @param	name the name of the entry
     * @param	date the date to start the runnable
     * @param	runnable the runnable object to start
     */
    public SchedulerEntry(String name,Date date,Runnable runnable) {
      timeSchedule = true;
      this.name = name;
      this.date = date;
      this.runnable = runnable;
    }
    /***
     * Construct a schedule entry
     * 
     * @param	name the name of the entry
     * @param	runnable the runnable object to start
     */
    public SchedulerEntry(String name,Runnable runnable) {
      timeSchedule = false;
      this.name = name;
      this.runnable = runnable;
    }
    /***
     * Construct a schedule entry
     * 
     * @param	name the name of the entry
     * @param	day
     * @param	hour
     * @param	minute
     * @param	runnable the runnable object to start
     * @param	ofWeek
     */
    public SchedulerEntry(
    String name,int day,int hour,int minute,Runnable runnable,boolean ofWeek) {
      timeSchedule = true;
      this.name = name;
     this.hour = hour;
     this.minute = minute;
     this.dayOfWeek = ofWeek ? day : -1;
     this.dayOfMonth = ofWeek ? -1 : day;
     this.runnable = runnable;
   }
   /***
    * @param	date
    */
   /***
    * Get the date
    * 
    */
   public Date getDate() {
     return date;
   }
   /***
    * Use for debug only
    * 
    */
   public String toString(){
     SimpleDateFormat format = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
     if(isTimeSchedule()){
       return format.format(new Date(time)) + " " + name;
     }
     else{
       return format.format("Http request " + name);
     }
   }
   /***
    * Compare the date of the entry
    * 
    * @param	o the entry to compare
    */
   public int compareTo(Object o) {
     if(super.equals(o)){
       return 0;
     }
     else{
       SchedulerEntry a = (SchedulerEntry)o;
       return (time <= a.getTime() ? -1 : 1);
       //don't return 0 if equals otherwise the treeset won't add 2 schedulerEntrys with the same time
     }
   }
   /***
    * @param	hour
    */
   /***
    * Get the hour
    * 
    */
   public int getHour() {
     return hour;
   }
   /***
    * @param	minute
    */
   /***
    * Get the minute
    * 
    */
   public int getMinute() {
     return minute;
   }
   /***
    * @param	dayOfWeek
    */
   /***
    * Get the day of week
    * 
    */
   public int getDayOfWeek() {
     return dayOfWeek;
   }
   /***
    * @param	time
    */
   /***
    * Get the time
    * 
    */
   public long getTime() {
     return time;
   }
   /***
    * @param	dayOfMonth
    */
   /***
    * Get the day of month
    * 
    */
   public int getDayOfMonth() {
     return dayOfMonth;
   }
   /***
    * Get the runnable object
    * 
    */
   public Runnable getRunnable() {
     return runnable;
   }
   /****/
   public int hashCode() {
     return runnable.hashCode();
   }
   /***
    * Set next time to start the runnable object
    * 
    */
   public void setNextTime(){
     if(getDate() != null){
       time = getDate().getTime();
     }
     else{
       Calendar cal = GregorianCalendar.getInstance();
       if(hour == -1){//imediat start
         cal.add(Calendar.SECOND,1);
         hour = 0;
         time = cal.getTime().getTime();
       }
       else if(dayOfMonth != -1){//scheduling by day of month
         if(dayOfMonth < cal.get(Calendar.DAY_OF_MONTH)){
           cal.add(Calendar.MONTH,1);
         }
         else if(dayOfMonth == cal.get(Calendar.DAY_OF_MONTH) && isPastTime(hour,minute)){
           cal.add(Calendar.MONTH,1);
         }
         cal.set(Calendar.DAY_OF_MONTH,dayOfMonth);
       }
       else if(dayOfWeek != -1){//scheduling by day of week
         if(dayOfWeek < cal.get(Calendar.DAY_OF_WEEK)){
           cal.add(Calendar.DATE,7);
         }
         else if(dayOfWeek == cal.get(Calendar.DAY_OF_WEEK) && isPastTime(hour,minute)){
           cal.add(Calendar.DATE,7);
         }
         cal.set(Calendar.DAY_OF_WEEK,dayOfWeek);
       }
       else if(isPastTime(hour,minute)){//scheduling all day
         cal.add(Calendar.DATE,1);
       }
       cal.set(Calendar.HOUR_OF_DAY,hour);
       cal.set(Calendar.MINUTE,minute);
       cal.set(Calendar.SECOND,0);
       time = cal.getTime().getTime();
     }
   }
   /***
    * Test if the time is a past time
    * 
    * @param	hour the hout to test
    * @param	minute
    */
   protected boolean isPastTime(int hour,int minute){
     Calendar cal = GregorianCalendar.getInstance();
     if(cal.get(Calendar.HOUR_OF_DAY) > hour){
       return true;
     }
     else if(cal.get(Calendar.HOUR_OF_DAY) == hour){
       return cal.get(Calendar.MINUTE) >= minute;
       //= is important when the execution of a task is less than 1 minute
     }
     else{
       return false;
     }
   }
   /***
    * Is a time scheduling
    * 
    */
   public boolean isTimeSchedule() {
     return timeSchedule;
   }
   /***
    * Get the name of the entry
    * 
    */
   public String getName() {
     return name;
   }
 }