package iiit.wsl.led;

import org.osgi.service.component.ComponentContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.pi4j.io.gpio.GpioController;
import com.pi4j.io.gpio.GpioFactory;
import com.pi4j.io.gpio.GpioPinDigitalOutput;
import com.pi4j.io.gpio.PinState;
import com.pi4j.io.gpio.RaspiPin;

public class Led {
	
	 private static final Logger s_logger = LoggerFactory.getLogger(Led.class);

	    private static final String APP_ID = "org.eclipse.kura.example.LED";
	    private GpioController gpio;
	    private GpioPinDigitalOutput pin;

	    protected void activate(ComponentContext componentContext) {

	    s_logger.info("<--Pi4J--> GPIO Control Example ... started.");
	         
	         // create gpio controller
	         final GpioController gpio = GpioFactory.getInstance();
	         
	         // provision gpio pin #01 as an output pin and turn on
	         final GpioPinDigitalOutput pin = gpio.provisionDigitalOutputPin(RaspiPin.GPIO_18, "MyLED", PinState.HIGH);

	         // set shutdown state for this pin
	         pin.setShutdownOptions(true, PinState.LOW);

	         s_logger.info("--> GPIO state should be: ON");

	         try {
				Thread.sleep(5000);
			
	         
	         // turn off gpio pin #01
	         pin.low();
	         s_logger.info("--> GPIO state should be: OFF");

	         Thread.sleep(5000);

	         // toggle the current state of gpio pin #01 (should turn on)
	         pin.toggle();
	         s_logger.info("--> GPIO state should be: ON");

	         Thread.sleep(5000);

	         // toggle the current state of gpio pin #01  (should turn off)
	         pin.toggle();
	         s_logger.info("--> GPIO state should be: OFF");
	         
	         Thread.sleep(5000);

	         // turn on gpio pin #01 for 1 second and then off
	         System.out.println("--> GPIO state should be: ON for only 1 second");
	         pin.pulse(1000, true); // set second argument to 'true' use a blocking call
	         
	         // stop all GPIO activity/threads by shutting down the GPIO controller
	         // (this method will forcefully shutdown all GPIO monitoring threads and scheduled tasks)
	         gpio.shutdown();
	        
	       
	    } catch (InterruptedException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	    } 

	    protected void deactivate(ComponentContext componentContext) {

	        s_logger.info("Bundle " + APP_ID + " has stopped!");
	        pin.low();

	    }

}