/*
    *  
    *  author nambi sankaran
    *  copyright (C) 2009 nambi sankaran.
    *
    *  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 3 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, see <http://www.gnu.org/licenses/>.
   *
   */
  package net.sf.emarket.quote.service;
  
  import java.sql.Timestamp;
  import java.util.Calendar;
  import java.util.Date;
  import java.util.GregorianCalendar;
  import java.util.List;
  import java.util.TimeZone;
  
  import net.sf.emarket.quote.domain.Instrument;
  import net.sf.emarket.quote.domain.Quote;
  import net.sf.emarket.quote.repository.IQuoteDao;
  
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Service;
  
  @Service
  public class QuoteManagerServiceImpl implements IQuoteManagerService {
  	
  	private IQuoteDao quoteDao = null;
      private IInstrumentManager instrumentMgr = null;
  	
  	@Autowired
  	public void setQuoteDao(IQuoteDao dao){
  		quoteDao = dao;
  	}
  
      @Autowired
      public void setInstrumentManager( IInstrumentManager mgr){
          instrumentMgr = mgr;
      }
  
  	public void addQuote(Quote quote) {
  		
  		long quoteId = quoteDao.generateQuoteId();
  		quote.setId(quoteId);
  		
  		quoteDao.addQuote(quote);
  	}
  
  	public Quote deleteQuote(Quote quote) {
  		return quoteDao.deleteQuote(quote);
  	}
  
  	public Quote getQuote(String symbol) {
  
          // get the instrument
          Instrument  instr = instrumentMgr.getInstrument(symbol);
  
          // get the quote
  		Quote quote = quoteDao.getQuote(symbol);
          quote.setInstrument( instr );
                  
          return quote;
  	}
  
  	public Quote getQuote(Quote quote) {
  		return quoteDao.getQuote(quote);
  	}
  
  	public Quote updateQuote(Quote newQuote) {
  
          // get the current quote
          Quote oldQuote =getQuote( newQuote.getSymbol());
          Timestamp last = oldQuote.getTime();
      
          // FIXME: Get the timezone from configuration
          Calendar prevCal = new GregorianCalendar(TimeZone.getTimeZone("IST"));
          prevCal.setTimeInMillis(last.getTime());
          
          // FIXME: Get the timezone from configuration
          Calendar curCal = new GregorianCalendar( TimeZone.getTimeZone("IST"));
          curCal.setTimeInMillis( (new Date()).getTime() );
          
          // now check whether the date has changed
          if( curCal .getTimeInMillis() > prevCal.getTimeInMillis() ){
  	        if( (prevCal.get(Calendar.DAY_OF_MONTH) != curCal.get(Calendar.DAY_OF_MONTH)) &&
  	            (prevCal.get(Calendar.MONTH) != curCal.get(Calendar.MONTH)) && 
  	            (prevCal.get(Calendar.YEAR) != curCal.get(Calendar.YEAR) )){
  	        		newQuote.setPreviousClose(oldQuote.getLastPrice());
 	        }else{
 	        	newQuote.setPreviousClose(oldQuote.getPreviousClose());
 	        }
         }else{
         	//FIXME: something weird is going on
         }
         
         float change = newQuote.getLastPrice() - newQuote.getPreviousClose();
         newQuote.setChange( change);
 		
 		long quoteId = quoteDao.generateQuoteId();
 		newQuote.setId(quoteId);
 
 		quoteDao.addQuoteHistory(newQuote);
 		return quoteDao.updateQuote(newQuote);
 	}
 	
 	public List<Quote> getAllQuotes(){
 		List<Quote> quotes = quoteDao.getAllQuotes();
 
         for( Quote quote : quotes ){
             Instrument instr = instrumentMgr.getInstrument( quote.getSymbol() );
             quote.setInstrument( instr );
         }
 
         return quotes;
 	}
 
     public List<Quote> getQuotes(List<String> symbols) throws SymbolsCannotBeEmptyException {
     	
     	if( symbols == null || symbols.size() ==0 ){
     			throw new SymbolsCannotBeEmptyException("");
     	}
 
 		List<Quote> quotes = quoteDao.getQuotes( symbols);
 
         for( Quote quote : quotes ){
             Instrument instr = instrumentMgr.getInstrument( quote.getSymbol() );
             quote.setInstrument( instr );
         }
 
         return quotes;
     }
     
    /* public static void main(String[] args){
     	
     	Date today = new Date();
     	long dayInMillis = 24 * 60 *60 * 1000;
         
         // Get all time zone ids
         String[] zoneIds = TimeZone.getAvailableIDs();
         
         Calendar c1 = new GregorianCalendar( TimeZone.getTimeZone("IST"));
         c1.setTimeInMillis( today.getTime() );
         
         Calendar c2 = new GregorianCalendar( TimeZone.getTimeZone("IST"));
         c2.setTimeInMillis(today.getTime() - dayInMillis);
         
         System.out.println( c1.get(Calendar.DAY_OF_MONTH) +":" + c1.get(Calendar.HOUR_OF_DAY) + ":" + c1.get(Calendar.MINUTE));
         System.out.println( c2.get(Calendar.DAY_OF_MONTH) +":" + c2.get(Calendar.HOUR_OF_DAY) + ":" + c2.get(Calendar.MINUTE));
         
         // View every time zone
         for (int i=0; i<zoneIds.length; i++) {
             // Get time zone by time zone id
             TimeZone tz = TimeZone.getTimeZone(zoneIds[i]);
         
             // Get the display name
             String shortName = tz.getDisplayName(tz.inDaylightTime(today), TimeZone.SHORT);
             String longName = tz.getDisplayName(tz.inDaylightTime(today), TimeZone.LONG);
         
             // Get the number of hours from GMT
             int rawOffset = tz.getRawOffset();
             int hour = rawOffset / (60*60*1000);
             int min = Math.abs(rawOffset / (60*1000)) % 60;
         
             // Does the time zone have a daylight savings time period?
             boolean hasDST = tz.useDaylightTime();
         
             // Is the time zone currently in a daylight savings time?
             boolean inDST = tz.inDaylightTime(today);
             
             System.out.println( zoneIds[i] + ", "+ shortName+ "," + longName + ": "+ rawOffset + ", "+ hour + ", "+ min + ", " + hasDST + ", "+ inDST);
         }
     }
 */
 }