/*Copyright (C) 2004-... Stephane Gauchet for Hyphonem
   
    This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
   
    This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
   
    You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
    
    Written by St�phane Gauchet
   mail me at : sgauchet@free.fr
   */
  package fr.hyphonem.conges;
  
  import java.math.BigInteger;
  import java.text.ParseException;
  import java.text.SimpleDateFormat;
  import java.util.Calendar;
  import java.util.Date;
  import java.util.Enumeration;
  import java.util.Hashtable;
  
  /**
   * @author Stephane Gauchet pour Hyphonem
   * 
   * class for handling fery days by country
   */
  public class FeryDays {
  
  	/**
  	 * Constructor for FeryDays.
  	 */
  	public FeryDays() {
  		super();
  	}
  
  	/**
  	 * nouvelle methode pour charger les jours feries depuis les fichiers xml
  	 * des pays <br>
  	 * new method to load national days from country xml files
  	 * 
  	 * @param datedeb
  	 * @param datefin
  	 * @param paysISO
  	 * @param dir
  	 * @return Hashtable
  	 * @throws Exception
  	 * @throws ParseException
  	 */
  	public Hashtable getNationalDays(String datedeb, String datefin,
  			String paysISO, String dir) throws Exception {
  		Hashtable hjf = new Hashtable();
  
  		String anneedeb = datedeb.substring(datedeb.lastIndexOf("/") + 1);
  		String anneefin = datefin.substring(datefin.lastIndexOf("/") + 1);
  
  		AccessData ad = new AccessDataMng().getInstance(dir);
  
  		if (anneedeb.equals(anneefin)) {
  			hjf = ad.readNationalHolidays(paysISO, anneedeb);
  		} else {
  			Hashtable hJFdeb = ad.readNationalHolidays(paysISO, anneedeb);
  			Hashtable hJFfin = ad.readNationalHolidays(paysISO, anneefin);
  			hJFdeb.putAll(hJFfin);
  			hjf = hJFdeb;
  		}
  		return hjf;
  	}
  
  	/**
  	 * @deprecated use getNationalDays instead return list of fery days from a
  	 *             given period <br/> to be completed because only code for fery
  	 *             days in FRANCE are set <br/> retourne les jours feries dans
  	 *             une periode donn�e et pour le pays indiqu� A Compl�ter!!
  	 *             seule la france est prise en compte pour l'instant cette
  	 *             methode doit etre entierement revue un de ces 4
  	 * @param datedeb
  	 * @param datefin
  	 * @param paysISO
  	 * @return Hashtable
  	 * @throws ParseException
  	 */
  	public Hashtable getJoursFeries(String datedeb, String datefin,
  			String paysISO) throws ParseException {
  		// Hashtable vJF = new Hashtable();
  		// NationalDayData jf = new NationalDayData();
  		Hashtable hJF = new Hashtable();
  		Hashtable hJFFlottant = new Hashtable();
  		Hashtable hJFFixesFlottants = new Hashtable();
  		Hashtable hJFFixe = new Hashtable();
  
  		Date datdeb = new SimpleDateFormat("dd/MM/yyyy").parse(datedeb);
  		Date datfin = new SimpleDateFormat("dd/MM/yyyy").parse(datefin);
  
  		// jours feries pour la france
  		if (paysISO.equals("FR")) {
  			// hashtable des jours feries fixes key=mois & value=Hashtable des
  			// jours
  			Hashtable vj = new Hashtable();
  			// 1er janvier
 			vj.put("01", "Jour de l'an");
 			hJF.put("01", vj);
 			// 1er & 8 mai
 			vj = new Hashtable();
 			vj.put("01", "Fete du Travail");
 			vj.put("08", "Victoire 1945");
 			hJF.put("05", vj);
 			// 14 juillet
 			vj = new Hashtable();
 			vj.put("14", "Fete Nationale");
 			hJF.put("07", vj);
 			// 15 Aout
 			vj = new Hashtable();
 			vj.put("15", "Assomption");
 			hJF.put("08", vj);
 			// 1er et 11 Novembre
 			vj = new Hashtable();
 			vj.put("01", "Toussaint");
 			vj.put("11", "Armistice 1918");
 			hJF.put("11", vj);
 			// 25 D�cembre
 			vj = new Hashtable();
 			vj.put("25", "Noel");
 			hJF.put("12", vj);
 
 			Calendar cal = Calendar.getInstance();
 			cal.setTime(datdeb);
 			int year_deb = cal.get(Calendar.YEAR);
 			// System.out.println("deb="+year_deb);
 			cal.setTime(datfin);
 			int year_fin = cal.get(Calendar.YEAR);
 			// System.out.println("fin="+year_fin);
 			// System.out.println("000");
 			int[] years;
 			// System.out.println("00");
 			if (year_deb == year_fin) {
 				years = new int[1];
 				years[0] = year_deb;
 			} else {
 				int diff1 = year_fin - year_deb;
 				// System.out.println("0");
 				if (diff1 == 1) {
 					// System.out.println("1");
 					years = new int[2];
 					// System.out.println("2");
 					years[0] = year_deb;
 					// System.out.println("3");
 					years[1] = year_fin;
 				} else {
 					// year_deb & year_fin > 1
 					int i = 0;
 					int diff = year_fin - year_deb + 1;
 					years = new int[diff];
 					for (int a = year_deb; a <= year_fin; a++) {
 						years[i] = a;
 						// System.out.println("annee"+a);
 						i++;
 					}
 				}
 			}
 
 			for (int a = 0; a < years.length; a++) {
 				int annee = years[a];
 				// System.out.println(">>>>>>"+annee);
 				for (Enumeration enumr = hJF.keys(); enumr.hasMoreElements();) {
 					String mois = (String) enumr.nextElement();
 					// System.out.println(mois);
 					Hashtable hjours = (Hashtable) hJF.get(mois);
 					for (Enumeration enumj = hjours.keys(); enumj
 							.hasMoreElements();) {
 						String jour = (String) enumj.nextElement();
 						// System.out.println(jour);
 						String label = (String) hjours.get(jour);
 						// System.out.println(label);
 						String dateJF = jour + "/" + mois + "/" + annee;
 						// System.out.println(dateJF);
 						Date djf = new SimpleDateFormat("dd/MM/yyyy")
 								.parse(dateJF);
 						if (djf.compareTo(datdeb) >= 0
 								&& djf.compareTo(datfin) <= 0) {
 							hJFFixe.put(dateJF, label);
 						}
 					}
 				}
 
 				// jours feries flottants dependant du jour de paques
 				String paques = getJourPaques("" + annee);
 				Date datePaques = new SimpleDateFormat("dd/MM/yyyy")
 						.parse(paques);
 
 				cal.setTime(datePaques);
 				// lundi de paques = Paques + 1 jour
 				cal.add(Calendar.DATE, 1);
 				Date lundiPaq = cal.getTime();
 				String datLundiPaq = new SimpleDateFormat("dd/MM/yyyy")
 						.format(lundiPaq);
 				if (lundiPaq.compareTo(datdeb) >= 0
 						&& lundiPaq.compareTo(datfin) <= 0) {
 					hJFFlottant.put(datLundiPaq, "Lundi de Paques");
 				}
 
 				// ascension = Paques + 39 jours
 				cal.add(Calendar.DATE, 38);
 				Date ascension = cal.getTime();
 				String datAscension = new SimpleDateFormat("dd/MM/yyyy")
 						.format(ascension);
 				if (ascension.compareTo(datdeb) >= 0
 						&& ascension.compareTo(datfin) <= 0) {
 					hJFFlottant.put(datAscension, "Ascension");
 				}
 
 				// Lundi de Pentecote = Paques + 50 jours;
 				cal.add(Calendar.DATE, 11);
 				Date lundiPentecote = cal.getTime();
 				String datlundiPentecote = new SimpleDateFormat("dd/MM/yyyy")
 						.format(lundiPentecote);
 				if (lundiPentecote.compareTo(datdeb) >= 0
 						&& lundiPentecote.compareTo(datfin) <= 0) {
 					hJFFlottant.put(datlundiPentecote, "Lundi de Pentecote");
 				}
 			}
 			// mettre le code pour d'autres pays ici.
 			// ...
 			/**
 			 * @todo list of fery days for others country
 			 */
 			// on ajoute hJFFlottant � hJFFixe
 			hJFFixe.putAll(hJFFlottant);
 			// et on met hJFFixe dans hJFFixesFlottants
 			hJFFixesFlottants = hJFFixe;
 		}
 		// System.out.println(hJFFixesFlottants.toString());
 		return hJFFixesFlottants;
 	}
 
 	/**
 	 * return Paques day in this year <br/> Method Paques : retourne la date du
 	 * jour de Paques en fonction de l'annee cet algo est valable pour les dates
 	 * comprises entre 1583 et 4099
 	 * 
 	 * @param annee
 	 * @return String
 	 */
 	private String getJourPaques(String annee) {
 		BigInteger year = new BigInteger(annee);
 		BigInteger G0 = year.mod(new BigInteger("19"));
 		BigInteger G = G0.add(BigInteger.ONE);
 		BigInteger C = year.divide(new BigInteger("100")).add(BigInteger.ONE);
 		BigInteger X = new BigInteger("3").multiply(C).divide(
 				new BigInteger("4")).subtract(new BigInteger("12"));
 		BigInteger Z = ((new BigInteger("8").multiply(C)).add(new BigInteger(
 				"5"))).divide(new BigInteger("25")).subtract(
 				new BigInteger("5"));
 		BigInteger D = ((new BigInteger("5").multiply(year))
 				.divide(new BigInteger("4"))).subtract(X).subtract(
 				new BigInteger("10"));
 		BigInteger E = ((new BigInteger("11").multiply(G)).add(
 				new BigInteger("20")).add(Z).subtract(X)).mod(new BigInteger(
 				"30"));
 
 		if ((E.equals(new BigInteger("25")) && G
 				.compareTo(new BigInteger("11")) > 0)
 				|| E.equals(new BigInteger("24"))) {
 			E = E.add(BigInteger.ONE);
 		}
 
 		BigInteger N = new BigInteger("44").subtract(E);
 
 		if (N.compareTo(new BigInteger("21")) < 0) {
 			N = N.add(new BigInteger("30"));
 		}
 
 		BigInteger P = N.add(new BigInteger("7")).subtract(
 				(D.add(N)).mod(new BigInteger("7")));
 		BigInteger J;
 		if (P.compareTo(new BigInteger("31")) > 0) {
 			J = P.subtract(new BigInteger("31"));
 		} else {
 			J = new BigInteger(P.toString());
 		}
 		BigInteger M;
 		if (J.equals(P)) {
 			M = new BigInteger("3");
 		} else {
 			M = new BigInteger("4");
 		}
 
 		return J.toString() + "/" + M.toString() + "/" + year.toString();
 	}
 }