package dk.daoas.daoadresseservice;

import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.ServletRegistration;
import javax.servlet.annotation.WebListener;

import dk.daoas.daoadresseservice.admin.ServiceConfig;
import dk.thoerup.circuitbreaker.AccountingCircuitBreaker;
import dk.thoerup.circuitbreaker.CircuitBreakerManager;
import dk.thoerup.circuitbreaker.web.CircuitBreakerServletBase;
import dk.thoerup.webconfig.ConfigServlet;
import dk.thoerup.webconfig.ContextConfigLoader;

/**
 * Application Lifecycle Listener implementation class ContextListener
 *
 */
@WebListener
public class ContextListener implements ServletContextListener {
	



    public ContextListener() {
        // TODO Auto-generated constructor stub
    }

    public void contextDestroyed(ServletContextEvent ctxtEvt)  { 
         // TODO Auto-generated method stub
    }

    @Override
    public void contextInitialized(ServletContextEvent ctxtEvt)  {
    	System.out.println("Starting DAO Context");
    	
    	ServletContext ctxt = ctxtEvt.getServletContext();
    	
    	ServiceConfig conf = initConfig(ctxt);
    	
    	initDataLoader(ctxt, conf);
    	
    	initCircuitBreakers(ctxt, conf);
    	
    	
    	System.out.println("DAO Context done");
    }
    
    private void initDataLoader(ServletContext ctxt, ServiceConfig conf) {
    	DataLoader load = new DataLoader(ctxt,conf);    	
    	ctxt.setAttribute("dataloader", load);
    	load.doLoad();
    }
	
    
    private ServiceConfig initConfig(ServletContext ctxt) {
    	ServiceConfig conf = new ServiceConfig();
    	
    	new ContextConfigLoader(ctxt).loadConfig(conf);
    	
    	ctxt.setAttribute("config", conf);
    	
    	// /////////////////////////////////////
        ConfigServlet servlet = new ConfigServlet();
        servlet.setConfigObject( conf );
        ServletRegistration.Dynamic dynconf = ctxt.addServlet("webconfig", servlet );
        dynconf.addMapping("/ConfigServlet");
        
        return conf;	
        
    }
    
    private void initCircuitBreakers(ServletContext ctxt, ServiceConfig conf) {
    	CircuitBreakerManager mgr = CircuitBreakerManager.getManager();
    	
    	AccountingCircuitBreaker osm = new AccountingCircuitBreaker("osm", conf);
    	mgr.addCircuitBreaker( osm );
    	
    	AccountingCircuitBreaker google = new AccountingCircuitBreaker("google", conf);
    	mgr.addCircuitBreaker( google );
    	
    	
    	//
    	CircuitBreakerServletBase servlet = new CircuitBreakerServletBase();
        ServletRegistration.Dynamic dynconf = ctxt.addServlet("circuitbreaker", servlet);
        dynconf.addMapping("/CircuitBreakerServlet");
        dynconf.setInitParameter("readonly", "1");

    }
        
	
}