import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.WebResource;
import lombok.Data;
import org.codehaus.jackson.map.ObjectMapper;
import javax.ws.rs.core.MediaType;
import java.io.IOException;

/**
 * A easy to use class to facilitate calling the IFTTT Maker API (https://ifttt.com/maker) to trigger IFTTT recipes.
 * Requires Jersey and Jackson (I implemented this with versions 2.22.1 and 1.9.13 respectively)
 * @author Fergal Hanley - fergalhanley@gmail.com (http://fergalhanley.com)
 */
public class IFTTT {

	private static final String IFTTT_TRIGGER_ENDPOINT = "https://maker.ifttt.com/trigger/%s/with/key/%s";

	/**
	 * Trigger the IFTTT API.
	 * More details at https://maker.ifttt.com/use/<your api key here>
	 * @param event The unique event identifier you setup for the trigger
	 * @param key The app key generated by IFTTT
	 * @param values Up to three values you can pass to the API request
	 */
	public void trigger(String event, String key, Object ...values){
		Client client = Client.create();
		String resourceUrl = String.format(IFTTT_TRIGGER_ENDPOINT, event, key);
		WebResource webResource = client.resource(resourceUrl);
		IftttReq iftttReq = new IftttReq(values);
		webResource.type(MediaType.APPLICATION_JSON).post(iftttReq.toJson());
	}

	@Data private class IftttReq {
		private final String value1;
		private final String value2;
		private final String value3;

		public IftttReq(Object... values) {
			this.value1 = values.length > 0 ? String.valueOf(values[0]) : null;
			this.value2 = values.length > 1 ? String.valueOf(values[1]) : null;
			this.value3 = values.length > 2 ? String.valueOf(values[2]) : null;
		}

		public String toJson(){
			ObjectMapper mapper = new ObjectMapper();
			try {
				return mapper.writeValueAsString(this);
			} catch (IOException e) {
				e.printStackTrace();
				return null;
			}
		}
	}
}