package org.gcube.dataanalysis.dataminer.poolmanager.service;

import org.gcube.common.authorization.library.provider.SecurityTokenProvider;
import org.gcube.common.resources.gcore.GenericResource;
import org.gcube.common.resources.gcore.Resources;
import org.gcube.common.scope.api.ScopeProvider;
import org.gcube.dataanalysis.dataminer.poolmanager.ansible.AnsibleWorker;
import org.gcube.dataanalysis.dataminer.poolmanager.ansiblebridge.AnsibleBridge;
import org.gcube.dataanalysis.dataminer.poolmanager.clients.HAProxy;
import org.gcube.dataanalysis.dataminer.poolmanager.datamodel.*;
import org.gcube.informationsystem.publisher.AdvancedScopedPublisher;
import org.gcube.informationsystem.publisher.RegistryPublisherFactory;
import org.gcube.informationsystem.publisher.ScopedPublisher;
import org.gcube.informationsystem.publisher.exception.RegistryNotFoundException;
import org.gcube.resources.discovery.client.api.DiscoveryClient;
import org.gcube.resources.discovery.client.queries.api.SimpleQuery;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.tmatesoft.svn.core.SVNException;

import java.io.*;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.net.UnknownHostException;
import java.util.*;

import static org.gcube.resources.discovery.icclient.ICFactory.clientFor;
import static org.gcube.resources.discovery.icclient.ICFactory.queryFor;

public class DataminerPoolManager {

	private static final Logger LOGGER = LoggerFactory.getLogger(DataminerPoolManager.class);


	public String stageAlgorithm(Algorithm algo) throws IOException, InterruptedException {

		Cluster cluster = new Cluster();
		Host h = new Host();
		h.setName(getStagingDataminerHostname());
		cluster.addHost(h);

		//Assumes the service is running in RPrototypingLab
		String token = SecurityTokenProvider.instance.get();

		return addAlgorithmToCluster(algo, cluster, true, "root", true, token);
	}

	public String publishAlgorithm(Algorithm algo, String targetVREToken) throws IOException, InterruptedException {
		Cluster cluster = new Cluster();
		for (Host h : new HAProxy().listDataMinersByCluster()) {
			cluster.addHost(h);
		}
		return addAlgorithmToCluster(algo, cluster, false, "gcube", false, targetVREToken);

	}


	private String getStagingDataminerHostname(){
		return null;
	}

	private void updateSVNDependencies(Algorithm algo, boolean stagingVRE) throws IOException, SVNException {
		for (Dependency d : algo.getDependencies()) {

			if (d.getType().equals("os")) {
				List<String> ls = new LinkedList<String>();
				ls.add(d.getName());
				this.updateSVN(stagingVRE ? "test_": "" + "r_deb_pkgs.txt", ls);
			}
			if (d.getType().equals("cran")) {
				List<String> ls = new LinkedList<String>();
				ls.add(d.getName());
				this.updateSVN(stagingVRE ? "test_": "" + "r_cran_pkgs.txt", ls);
			}
			if (d.getType().equals("github")) {
				List<String> ls = new LinkedList<String>();
				ls.add(d.getName());
				this.updateSVN(stagingVRE ? "test_": "" + "r_github_pkgs.txt", ls);
			}
		}
	}


	private void createISResource(Algorithm algo, String vreToken){
		//TODO: implement method

		//TODO: create the resource only if not already present
	}



	/**
	 *
	 * @param algo
	 * @param dataminerCluster
	 * @return uuid of the execution
	 */
	public String addAlgorithmToCluster(
			final Algorithm algo,
			Cluster dataminerCluster,
			boolean includeAlgorithmDependencies,
			String user,
			final boolean stagingVRE,
			final String targetVREToken) throws IOException {

		AnsibleBridge ansibleBridge = new AnsibleBridge();
		final AnsibleWorker worker = ansibleBridge.createWorker(algo, dataminerCluster, includeAlgorithmDependencies, user);

		new Thread(new Runnable() {
			@Override
			public void run() {
				try {
					File path = new File(worker.getWorkdir() + File.separator + "logs");
					path.mkdirs();
					File n = new File(path + File.separator + worker.getWorkerId());
					FileOutputStream fos = new FileOutputStream(n);
					PrintStream ps = new PrintStream(fos);
					int retValue = worker.execute(ps);
					System.out.println("Log stored to to " + n.getAbsolutePath());

					if(retValue == 0) {
							updateSVNDependencies(algo, stagingVRE);
							createISResource(algo, targetVREToken);
					}
					// destroy the worker
					worker.destroy();
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		}).start();

		// this line will execute immediately, not waiting for task to
		// complete
		return worker.getWorkerId();
	}


	
	public String getScriptFromURL(URL url) throws IOException {
		if (url == null) {
			return null;
		}
		URLConnection yc = url.openConnection();
		BufferedReader input = new BufferedReader(new InputStreamReader(yc.getInputStream()));
		String line;
		StringBuffer buffer = new StringBuffer();
		while ((line = input.readLine()) != null) {
			buffer.append(line + "\n");
		}
		String bufferScript = buffer.substring(0, buffer.length());
		input.close();
		return bufferScript;
	}

	/**
	 * Publish the given algorithm in the given VRE
	 * 
	 * @param algorithmName
	 * @param vre
	 * 
	 */
	public String addAlgorithmToVRE(Algorithm algorithm, final String vre, /*final boolean updateSVN*/ final boolean test) throws IOException {
		// create a fake algorithm set
		final AlgorithmSet algoSet = new AlgorithmSet();
		algoSet.setName("fake");
		algoSet.addAlgorithm(algorithm);
		final String uuid = UUID.randomUUID().toString();

		new Thread(new Runnable() {
			@Override
			public void run() {
				// TODO Auto-generated method stub
				try {
					try {
						addAlgorithmsToVRE(algoSet, vre, uuid, /*updateSVN*/test);
					} catch (SVNException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
		}).start();
		// this line will execute immediately, not waiting for task to
		// complete
		System.out.println(uuid);
		return uuid;
	}

	public String addAlgorithmToHost(Algorithm algorithm, final String hostname, /*final boolean updateSVN*/ final boolean test) throws IOException {
		// create a fake algorithm set
		final AlgorithmSet algoSet = new AlgorithmSet();
		algoSet.setName("fake");
		algoSet.addAlgorithm(algorithm);
		final String uuid = UUID.randomUUID().toString();

		new Thread(new Runnable() {
			@Override
			public void run() {
				// TODO Auto-generated method stub
				try {
					if(test){
					addAlgorithmsToStagingHost(algoSet, hostname, uuid, /*updateSVN,*/test);}
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} catch (SVNException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
		}).start();
		// this line will execute immediately, not waiting for your task to
		// complete
		System.out.println(uuid);
		return uuid;
	}


	public URL getURLfromWorkerLog(String a) throws MalformedURLException, UnknownHostException {

		File path = new File(System.getProperty("user.home") + File.separator + "dataminer-pool-manager/work/"
				+ a + File.separator + "logs");
		path.mkdirs();
		File n = new File(path + File.separator + a);
		// String addr = InetAddress.getLocalHost().getHostAddress();

		return new File(n.getPath()).toURI().toURL();
	}

	public String addAlgorithmsToVRE(AlgorithmSet algorithms, String vre, String uuid, /*boolean updateSVN,*/ boolean test) throws IOException, InterruptedException, SVNException {

		// create the cluster (dataminers in the vre)
		Cluster cluster = new Cluster();
		 for (Host h : new HAProxy().listDataMinersByCluster()) {
		//for (Host h : new ISClient().listDataminersInVRE()) {
			cluster.addHost(h);
		}

		// apply the changes
		AnsibleBridge a = new AnsibleBridge();
		return a.applyAlgorithmSetToCluster(algorithms, cluster, uuid, /*updateSVN,*/ test).getWorkerId();

	}

	public String addAlgorithmsToHost(AlgorithmSet algorithms, String hostname, String uuid, /*boolean updateSVN,*/boolean test)
			throws IOException, InterruptedException, SVNException {

		// create the cluster (dataminers in the vre)
		Cluster cluster = new Cluster();
		for (Host h : new HAProxy().listDataMinersByCluster()) {
			if (h.getName().equals(hostname)) {
				cluster.addHost(h);
			}
		}
		// if(ISClient.getHProxy().equals(hostname)){
		// cluster.addHost(new ISClient().getDataminer(hostname));
		// }
		// apply the changes
		AnsibleBridge a = new AnsibleBridge();
		return a.applyAlgorithmSetToCluster(algorithms, cluster, uuid, /*updateSVN,*/test).getWorkerId();

	}
	
	
	public String addAlgorithmsToStagingHost(AlgorithmSet algorithms, String hostname, String uuid, /*boolean updateSVN,*/boolean test)
			throws IOException, InterruptedException, SVNException {
		Cluster cluster = new Cluster();
		Host h = new Host();
		h.setName(hostname);
		cluster.addHost(h);
		
		AnsibleBridge a = new AnsibleBridge();
		return a.applyAlgorithmSetToCluster(algorithms, cluster, uuid, /*updateSVN,*/test).getWorkerId();

	}


	// 2017 March 29

	public void unPublishScopedResource(GenericResource resource) throws RegistryNotFoundException, Exception {
		ScopedPublisher scopedPublisher = RegistryPublisherFactory.scopedPublisher();
		AdvancedScopedPublisher advancedScopedPublisher = new AdvancedScopedPublisher(scopedPublisher);
		String id = resource.id();
		LOGGER.debug("Trying to remove {} with ID {} from {}", resource.getClass().getSimpleName(), id,
				ScopeProvider.instance.get());
		// scopedPublisher.remove(resource, scopes);
		advancedScopedPublisher.forceRemove(resource);
		LOGGER.debug("{} with ID {} removed successfully", resource.getClass().getSimpleName(), id);
	}

	public void publishScopedResource(GenericResource a, List<String> scopes)
			throws RegistryNotFoundException, Exception {
		StringWriter stringWriter = new StringWriter();
		Resources.marshal(a, stringWriter);

		ScopedPublisher scopedPublisher = RegistryPublisherFactory.scopedPublisher();
		try {
			System.out.println(scopes);
			System.out.println(stringWriter);
			scopedPublisher.create(a, scopes);
		} catch (RegistryNotFoundException e) {
			System.out.println(e);
			throw e;
		}
	}

	public void addAlgToIs(Algorithm algo) {
		GenericResource a = new GenericResource();
		a.newProfile().name(algo.getName()).type("StatisticalManagerAlgorithm").description(algo.getDescription());
		a.profile().newBody(this.getAlgoBody(algo));
		try {
			publishScopedResource(a, Arrays.asList(new String[] { ScopeProvider.instance.get() }));
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	private String getAlgoBody(Algorithm algo) {
		return "<category>" + algo.getCategory() + "</category>" + "\n" + "<clazz>" + algo.getClazz() + "</clazz>"
				+ "\n" + "<algorithmType>" + algo.getAlgorithmType() + "</algorithmType>" + "\n" + "<skipJava>"
				+ algo.getSkipJava() + "</skipJava>" + "\n" + "<packageURL>" + algo.getPackageURL() + "</packageURL>"
				+ "\n" + "<dependencies>" + algo.getDependencies() + "</dependencies>";
	}

	public void updateAlg(Algorithm algo) {

		ScopedPublisher scopedPublisher = RegistryPublisherFactory.scopedPublisher();

		SimpleQuery query = queryFor(GenericResource.class);
		query.addCondition("$resource/Profile/Name/text() eq '" + algo.getName() + "'").setResult("$resource");
		DiscoveryClient<GenericResource> client = clientFor(GenericResource.class);
		List<GenericResource> ds = client.submit(query);
		if (ds.isEmpty()) {
			return;
		}
		GenericResource a = ds.get(0);
		a.profile().newBody(this.getAlgoBody(algo));
		try {
			scopedPublisher.update(a);
		} catch (RegistryNotFoundException e) {
			e.printStackTrace();
		}
	}

	private Algorithm convertAlgo(GenericResource a) {
		Algorithm out = new Algorithm();

		// out.setId(a.profile().body().getElementsByTagName("id").item(0).getTextContent());
		out.setAlgorithmType(a.profile().body().getElementsByTagName("algorithmType").item(0).getTextContent());
		out.setCategory(a.profile().body().getElementsByTagName("category").item(0).getTextContent());
		out.setClazz(a.profile().body().getElementsByTagName("clazz").item(0).getTextContent());
		out.setName(a.profile().name());
		out.setPackageURL(a.profile().body().getElementsByTagName("packageURL").item(0).getTextContent());
		out.setSkipJava(a.profile().body().getElementsByTagName("skipJava").item(0).getTextContent());
		out.setDescription(a.profile().description());

		Set<org.gcube.dataanalysis.dataminer.poolmanager.datamodel.Dependency> deps = new HashSet<org.gcube.dataanalysis.dataminer.poolmanager.datamodel.Dependency>();
		for (int i = 0; i < a.profile().body().getElementsByTagName("dependencies").getLength(); i++) {
			org.gcube.dataanalysis.dataminer.poolmanager.datamodel.Dependency d1 = new org.gcube.dataanalysis.dataminer.poolmanager.datamodel.Dependency();
			d1.setName(a.profile().body().getElementsByTagName("dependencies").item(i).getTextContent());
			deps.add(d1);
		}
		out.setDependencies(deps);
		return out;
	}

	public Set<Algorithm> getAlgoFromIs() {
		// TODO Auto-generated method stub

		Set<Algorithm> out = new HashSet<Algorithm>();
		SimpleQuery query = queryFor(GenericResource.class);
		query.addCondition("$resource/Profile/SecondaryType/text() eq 'StatisticalManagerAlgorithm'")
				.setResult("$resource");
		DiscoveryClient<GenericResource> client = clientFor(GenericResource.class);
		List<GenericResource> ds = client.submit(query);
		for (GenericResource a : ds) {
			out.add(this.convertAlgo(a));
		}
		return out;
	}


	public List<String> updateSVN(String file, List<String> ldep) throws SVNException, IOException {
		// TODO Auto-generated method stub
		return null;
	}

	
	

	
	

	


}