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package utils;

import com.evolute.utils.error.ErrorLogger;
import db.providers.AnalisesDataProvider;
import global.Global;
import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;
import javax.faces.context.FacesContext;
import javax.servlet.ServletContext;

/**
 *
 * @author lluis
 */
public class Logos
{

	private static Logos INSTANCE = null;

	private Logos()
	{

	}

	public static synchronized Logos getInstance()
	{
		if ( INSTANCE == null )
		{
			INSTANCE = new Logos();
		}
		return INSTANCE;
	}


    public String getLogo( Integer empresaID )
    {
        return null;
    }



	private final Map< Integer, String > LOGOS = new HashMap< Integer, String >();

    public String getLogo( FacesContext fc, Integer empresaID )
    {
		if ( ! LOGOS.containsKey( empresaID ) )
		{
			fetchLogoFromDB( fc, empresaID );
		}
		String result = LOGOS.get( empresaID );
		System.out.println( "LOGO PATH : " + result );
		return result;
	}


	private void fetchLogoFromDB( FacesContext fc, Integer empresaID )
	{
		String filepath = Global.LOGOS_FOLDER + "/logo_empresa" + empresaID + ".jpg";
		File f = new File( filepath );
		if ( ! f.isFile() )
		{
			try
			{
				byte[] logo = AnalisesDataProvider.getInstance().getLogoByEmpresa( empresaID );
				if ( logo != null )
				{
					int len = logo.length;

					ServletContext context = ( ServletContext ) fc.getExternalContext().getContext();
					File logoFolder =  new File( context.getRealPath( Global.LOGOS_FOLDER ) );
					String logoFilename = logoFolder + "/logo_empresa" + empresaID.toString() + ".jpg";
					OutputStream outImej = new FileOutputStream( logoFilename );
					outImej.write( logo, 0, len );
					outImej.flush();
					outImej.close();

					LOGOS.put( empresaID, filepath );
				}
			}
			catch ( Exception e )
			{
				ErrorLogger.logException( e );
			}
		}
    }

}