/*-
 * ============LICENSE_START=======================================================
 * ONAP - SO
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============LICENSE_END=========================================================
 */

package org.onap.so.bpmn.infrastructure.bpmn.activity;

import java.io.File;
import java.nio.file.Files;
import java.nio.file.Paths;

import javax.ws.rs.core.UriBuilder;

import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClientBuilder;
import org.springframework.stereotype.Component;

@Component
public class DeployActivitySpecs {
	private static final String ACTIVITY_FILE_LOCATION = "src/main/resources/ActivitySpec/";
	private static final String ACTIVITY_SPEC_URI = "/activityspec-api/v1.0/activity-spec";
	private static final String CONTENT_TYPE_JSON = "application/json";
	
	public static void main(String[] args) throws Exception {
		
		if (args == null || args.length == 0) {
			System.out.println("Please specify hostname argument");
			return;
		}
		
		String hostname = args[0];
		
    	File dir = new File(ACTIVITY_FILE_LOCATION);
    	if (!dir.isDirectory()) {
    		System.out.println("ActivitySpec store is not a directory");
    		return;
    	}
    	
    	for (File f : dir.listFiles()) {
    		String activitySpecName = f.getName();
    		String errorMessage = deployActivitySpec(hostname, activitySpecName);
    		if (errorMessage == null) {
    			System.out.println("Deployed Activity Spec: " + activitySpecName);
    		}
    		else {
    			System.out.println("Error deploying Activity Spec: " + activitySpecName + " : " + errorMessage);
    		}
    	}
    	return;    	
    }    
    
	protected static String deployActivitySpec(String hostname, String activitySpecName) throws Exception {		
		String payload = new String(Files.readAllBytes(Paths.get(ACTIVITY_FILE_LOCATION + activitySpecName)));
		try {			
			HttpClient client = HttpClientBuilder.create().build();
					
			String url = UriBuilder.fromUri(hostname).path(ACTIVITY_SPEC_URI).build().toString();			
			HttpPost post = new HttpPost(url);		
			
			StringEntity input = new StringEntity(payload);
			input.setContentType(CONTENT_TYPE_JSON);
			post.setEntity(input);				
			
			HttpResponse response = client.execute(post);
			StatusLine statusLine = response.getStatusLine();
			
			if (statusLine != null) {
				if (statusLine.getStatusCode() != 200) {
					return (statusLine.toString());
				}
				else {
					return null;
				}
			}
			else {
				return("Empty response from the remote endpoint");
			}
	            
		} catch (Exception e) {				
			return e.getMessage();
		}
		
	}	
}