package app;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.logging.Logger;

import javax.ws.rs.HttpMethod;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.Invocation.Builder;

import org.gcube.common.authorization.library.provider.AuthorizationProvider;
import org.gcube.common.authorization.library.provider.UserInfo;
import org.gcube.common.authorization.library.utils.Caller;
import org.gcube.smartgears.extensions.HttpExtension.Method;
import org.glassfish.jersey.client.ClientConfig;
import org.glassfish.jersey.client.ClientResponse;
import org.glassfish.jersey.logging.LoggingFeature;

import utils.TestUtils;

public class Request {

	private String path="";
	private String scope = TestUtils.scope;
	
	//private OutBoundHeaders headers = new OutBoundHeaders();
	private String method = HttpMethod.GET;
	private String body = null;
	private boolean logged = false;
	Map<String, List<Object>> headers = new HashMap<>();
	
	public static Request request() {
		return new Request();
	}
	
	private Request() {
		
	}
	
	public Request at(String path) {
		this.path=path;
		return this;
	}
	
	public Request logging() {
		logged=true;
		return this;
	}
	
	public Request inScope(String scope) {
		this.scope=scope;
		return this;
	}
	
	public Request with(String body) {
		this.body=body;
		return this;
	}
	
	public Request with(String name, String value) {
		this.headers.put(name, Collections.singletonList(value));
		return this;
	}
	
	public Request using(Method method) {
		this.method=method.getValue();
		return this;
	}
	
	public String path() {
		return path;
	}
	
	public String body() {
		return body;
	}
	
	public String method() {
		return method;
	}
	
	public String scope() {
		return scope;
	}
	
	ClientResponse make(final int port) {

		
		// we make a scoped call in a separate thread, with which we then synchronize for completion.
		// this helps isolate the caller's thread (Main normally) from the app's thread,
		// starting with the scope itself.
		final CountDownLatch latch = new CountDownLatch(1);
		
		class Box {

			volatile WebApplicationException failure;
			volatile ClientResponse response;
			
		}

		final Box box = new Box();

		new Thread() {

			public void run() {

				AuthorizationProvider.instance.set(new Caller(new UserInfo("test", new ArrayList<String>()),"DEFAULT"));

				try {
					
					ClientConfig config = new ClientConfig();
					
					
					
					
					Client client = ClientBuilder.newClient();
					
					
					if (logged) 
						client.register(new LoggingFeature(Logger.getLogger(getClass().getName())));
					
					Builder builder = client.target(address(path,port)).request();
					builder.header("gcube-scope", scope);
					
					
										
					for (Entry<String,List<Object>> header : headers.entrySet())
						for (Object value : header.getValue())
							builder.header(header.getKey(), value);
					
					if (method.equals(HttpMethod.DELETE))
						builder.delete();
					else {
						
						System.err.println("making request @ "+address(path,port));
						
						ClientResponse response = builder.method(method,ClientResponse.class);
					
						//throws an exception if there response has error status
						if (response.getStatus()>300)
							throw new WebApplicationException(response.getStatus());
						
						box.response=response;
					}
					
					
				} catch (WebApplicationException t) {
					box.failure=t;
				}

				latch.countDown();
			};
		}.start();

		try {
		
			if (!latch.await(2000, TimeUnit.MILLISECONDS))
				throw new RuntimeException("application has not responded in time");

		} catch (InterruptedException e) {
			throw new RuntimeException(e);
		}

		if (box.failure !=null)
			throw box.failure;
		
		else
			return box.response;
			
	}
	
	private String address(String path, long port) {
		
		path = (path.isEmpty() || path.startsWith("/"))?path:"/"+path;
		
		return "http://localhost:" + port+ "/" + TestUtils.context_root+path;
	}
	
}