/**
 * ============LICENSE_START====================================================
 * org.onap.aaf
 * ===========================================================================
 * Copyright (c) 2018 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.aaf.cadi.enduser.test;

import java.io.PrintWriter;
import java.net.URISyntaxException;
import java.security.Principal;

import org.onap.aaf.cadi.CadiException;
import org.onap.aaf.cadi.LocatorException;
import org.onap.aaf.cadi.enduser.ClientFactory;
import org.onap.aaf.cadi.enduser.RESTException;
import org.onap.aaf.cadi.enduser.SimpleRESTClient;
import org.onap.aaf.cadi.enduser.SimpleRESTClient.Input;
import org.onap.aaf.misc.env.APIException;


public class SimpleRestClientExample {
	public final static void main(final String args[]) throws URISyntaxException, LocatorException {
		try {
			// Note: Expect ClientFactory to be long-lived... do NOT create more than once.
			ClientFactory cf = new ClientFactory(args);
			
	
			String urlString = cf.getAccess().getProperty("myurl", null);
			if(urlString==null) {
				System.out.println("Note: In your startup, add \"myurl=https://<aaf hello machine>:8130\" to command line\n\t"
						+ "OR\n\t" 
						+ " add -Dmyurl=https://<aaf hello machine>:8130 to VM Args\n\t"
						+ "where \"aaf hello machine\" is an aaf Installation you know about.");
			} else {
				
				SimpleRESTClient restClient = cf.simpleRESTClient(urlString,"org.osaaf.aaf");

				/////////////////////////////////////////////////////////////
				//  
				// Creating Content for CREATE/UPDATE
				//
				/////////////////////////////////////////////////////////////
				// Create an object that can be reusable IN THIS THREAD ONLY... Not Thread-safe on purpose
				Input input = new SimpleRESTClient.Input();
				
				// Note: alternate use is to set the input object to an already created String
				// Input input = new SimpleRESTClient.Input(aString);
				
				PrintWriter pw = input.writer();
				pw.print("{\"something\": [");
				for(int i=0;i<4;++i) {
					if(i>0) {
						pw.print(',');
					}
					pw.print("{\"myint\":");
					pw.print(i);
					pw.print('}');
				}
				pw.println("]}");
				
				// You can check or log the content
				String content = input.toString();
				System.out.println(content);
				
				// Good form for Writers is that you should close it... 
				pw.close();

				/////////////////////////////////////////////////////////////
				//  
				// CREATE/POST
				//
				/////////////////////////////////////////////////////////////
				System.out.println("-------- START REST CREATE/UPDATE --------");
				try {
					restClient.create("resthello/rest_id", input);
					// No Error code, it worked.
					System.out.println("No Error Code, Create worked...");
				} catch (RESTException e) {
					System.out.println(e.getCode());
					System.out.println(e.getMsg());
				} finally {
					System.out.println("-------- END REST CREATE/UPDATE --------");
				}


				/////////////////////////////////////////////////////////////
				//  
				// READ/GET
				//
				/////////////////////////////////////////////////////////////

				// Make some calls.  Note that RESTException is thrown if Call does not complete.
				// RESTException has HTTP Code and any Message sent from Server
				System.out.println("-------- START REST READ/GET --------");
				boolean expectException = false;
				try {
					
					// Call with no Queries
					String rv = restClient.get("resthello/rest_id");
					System.out.println(rv);
					
					// Same call with "read" style
					rv = restClient.read("resthello/rest_id");
					System.out.println(rv);
					
					
					// Call with Queries
					rv = restClient.get("resthello/rest_id?perm=org.osaaf.people|*|read");
					System.out.println(rv);
					
					// Call setting ID from principal coming from Trans
					// Pretend Transaction
					HRequest req = new HRequest("demo@people.osaaf.org"); // Pretend Trans has Jonathan as Identity
					
					// Call with RESTException, which allows obtaining HTTPCode and any Error message sent
					rv = restClient.endUser(req.userPrincipal()).get("resthello/rest_id?perm=org.osaaf.people|*|read");
					System.out.println(rv);

					// Expect Exception here.
					System.out.println("-------- START Expecting Exception starting here --------");
					expectException = true;
					restClient.get("notAnAPI");
				} catch(RESTException e) {
					System.out.println(e.getCode());
					System.out.println(e.getMsg());
					System.out.println(e.getMessage());
					System.out.println(e.getLocalizedMessage());
					System.out.println(e);
				} finally {
					if(expectException) {
						System.out.println("-------- END Expecting Exception starting here --------");
					}
					System.out.println("-------- END REST READ/GET --------");
				}

				/////////////////////////////////////////////////////////////
				//  
				// UPDATE/PUT
				//
				/////////////////////////////////////////////////////////////

				
				// If you use "input" object again as a writer, you can clear it on the same thread, and go again
				input.clear();
				// Here we just set to a String, instead of Writing
				input.set("{\"something\" : []}");
				
				System.out.println("-------- END REST UPDATE/PUT --------");
				try {
					String rv = restClient.update("resthello/rest_id", input);
					// No Error code, it worked.  REST Update will return the updated Data
					System.out.println("Update worked");
					System.out.println(rv);
				} catch (RESTException e) {
					System.out.println(e.getCode());
					System.out.println(e.getMsg());
				} finally {
					System.out.println("-------- END REST UPDATE/PUT --------");
				}

				/////////////////////////////////////////////////////////////
				//  
				// DELETE
				//
				/////////////////////////////////////////////////////////////

				System.out.println("-------- START REST DELETE --------");
				try {
					restClient.delete("resthello/rest_id");
					// No Error code, it worked.  REST Update will return the updated Data
					System.out.println("Delete worked");
				} catch (RESTException e) {
					System.out.println(e.getCode());
					System.out.println(e.getMsg());
				} finally {
					System.out.println("-------- END REST DELETE --------");
				}
			}			
		} catch (CadiException | APIException e) {
			e.printStackTrace();
		}
	}
	
	private static class HRequest { 
		
		public HRequest(String fqi) {
			name = fqi;
		}
		protected final String name;

	// fake out HttpServletRequest, only for get Principal
		public Principal userPrincipal() {
			return new Principal() {

				@Override
				public String getName() {
					return name;
				}
				
			};
		}
	}
}