package eu.eudat.controllers;

import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.UUID;
import java.util.stream.Collectors;

import javax.transaction.Transactional;

import org.apache.commons.lang3.SerializationUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.util.MultiValueMap;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

import com.fasterxml.jackson.annotation.JsonInclude.Include;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;

import eu.eudat.dao.entities.DMPDao;
import eu.eudat.dao.entities.DMPProfileDao;
import eu.eudat.dao.entities.DataRepositoryDao;
import eu.eudat.dao.entities.DatasetDao;
import eu.eudat.dao.entities.DatasetProfileDao;
import eu.eudat.dao.entities.DatasetProfileRulesetDao;
import eu.eudat.dao.entities.DatasetProfileViewstyleDao;
import eu.eudat.dao.entities.OrganisationDao;
import eu.eudat.dao.entities.ProjectDao;
import eu.eudat.dao.entities.RegistryDao;
import eu.eudat.dao.entities.ResearcherDao;
import eu.eudat.dao.entities.ServiceDao;
import eu.eudat.dao.entities.UserInfoDao;
import eu.eudat.entities.DMP;
import eu.eudat.entities.DMPProfile;
import eu.eudat.entities.DataRepository;
import eu.eudat.entities.Dataset;
import eu.eudat.entities.DatasetProfile;
import eu.eudat.entities.DatasetProfileRuleset;
import eu.eudat.entities.Organisation;
import eu.eudat.entities.Project;
import eu.eudat.entities.Registry;
import eu.eudat.entities.Researcher;
import eu.eudat.entities.Service;
import eu.eudat.entities.UserInfo;
import eu.eudat.entities.responses.IDLabelPair;

import eu.eudat.helpers.Transformers;
import eu.eudat.managers.ProjectManager;
import eu.eudat.models.helpers.DataTableData;
import eu.eudat.models.project.ProjectTableRequest;
import eu.eudat.proxy.config.exceptions.HugeResultSet;
import eu.eudat.proxy.config.exceptions.NoURLFound;
import eu.eudat.proxy.fetching.RemoteFetcher;
import eu.eudat.responses.RestResponse;


@RestController
@CrossOrigin
public class Projects  {
	
	@Autowired private DataRepositoryDao dataRepositoryDao;
	@Autowired private DatasetDao datasetDao;
	@Autowired private DatasetProfileDao datasetProfileDao;
	@Autowired private DatasetProfileRulesetDao datasetProfileRulesetDao;
	@Autowired private DatasetProfileViewstyleDao datasetProfileViewstyleDao;
	@Autowired private DMPDao dMPDao;
	@Autowired private DMPProfileDao dMPProfileDao;
	@Autowired private OrganisationDao organisationDao;
	@Autowired private ProjectDao projectDao;
	@Autowired private RegistryDao registryDao;
	@Autowired private ResearcherDao researcherDao;
	@Autowired private ServiceDao serviceDao;
	@Autowired private UserInfoDao userInfoDao;
	
	@Autowired private RemoteFetcher remoteFetcher;
	
	
	
	
	
	@RequestMapping(method = RequestMethod.POST, value = { "/projects/getPaged" }, consumes = "application/json", produces="application/json")
	public @ResponseBody ResponseEntity<DataTableData<eu.eudat.models.project.Project>> getPaged(@RequestBody ProjectTableRequest projectTableRequest) {
		try {
			DataTableData<eu.eudat.models.project.Project> dataTable = new ProjectManager().getPaged(projectDao, projectTableRequest);
			return ResponseEntity.status(HttpStatus.OK).body(dataTable);

		} catch (Exception ex) {			
			ex.printStackTrace();
			return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(null);
		}
	}
	
	@RequestMapping(method = RequestMethod.GET, value = { "/projects/getSingle/{id}" }, produces="application/json")
	public @ResponseBody ResponseEntity<eu.eudat.models.project.Project> getPaged(@PathVariable String id) {
		try {
			eu.eudat.models.project.Project project = new ProjectManager().getSingle(projectDao, id);
			return ResponseEntity.status(HttpStatus.OK).body(project);
		} catch (Exception ex) {			
			ex.printStackTrace();
			return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(null);
		}
	}
	
	
	@Transactional
	@RequestMapping(method = RequestMethod.POST, value = { "/projects/add" }, consumes = "application/json", produces="application/json")
	public @ResponseBody ResponseEntity<eu.eudat.entities.Project> addProject(@RequestBody eu.eudat.models.project.Project project) {
		Project createdProject = projectDao.update(project.toDataModel());
		return ResponseEntity.status(HttpStatus.CREATED).body(createdProject);
	}
	
	
	/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
	
	@RequestMapping(method = RequestMethod.GET, value = { "/external/projects" }, produces="application/json")
	public @ResponseBody ResponseEntity<List<Map<String,String>>> listExternalProjects(@RequestParam(value="query", required=false) String query ){
		try {
			List<Map<String,String>> remoteRepos = remoteFetcher.getProjects(query);
			return ResponseEntity.status(HttpStatus.OK).body(remoteRepos);
		}
		catch(NoURLFound ex) {
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(null);
		}
		catch(HugeResultSet ex) {
			return ResponseEntity.status(HttpStatus.UNPROCESSABLE_ENTITY).body(null); //the ex.getMessage has the appropriate text description
		}
	}
	

	// MANAGE PROJECT(S)
	
	@RequestMapping(method = RequestMethod.GET, value = { "/projects" }, produces="application/json")
	public @ResponseBody ResponseEntity<List<UUID>> listProjects(){
		try {
			List<UUID> allIDs = projectDao.listAllIDs();
			return ResponseEntity.status(HttpStatus.OK).body(allIDs);
		}
		catch(Exception ex) {
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(null);
		}
	}
	
	@RequestMapping(method = RequestMethod.GET, value = { "/projects/{id}" }, produces="application/json")
	public @ResponseBody ResponseEntity<Project> getProject(@PathVariable("id") String id) {
		try {
			Project project = projectDao.read(UUID.fromString(id));
			
			System.out.println(project.getId().toString());
			
			return ResponseEntity.status(HttpStatus.OK).body(project);
		}
		catch(Exception ex) {
			return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(null);
		}
	}
	
	
	@RequestMapping(method = RequestMethod.GET, value = { "/project/listAllLabelIDs" }, produces="application/json")
	public @ResponseBody ResponseEntity<List<IDLabelPair>> listLabelIds(){
		try {
			List<IDLabelPair> allIDs = projectDao.listAllIDsLabels();
			return ResponseEntity.status(HttpStatus.OK).body(allIDs);
		}
		catch(Exception ex) {
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(null);
		}
	}
	
	
	@RequestMapping(method = RequestMethod.GET, value = { "/project/getAll" }, produces="application/json")
	public @ResponseBody ResponseEntity<Object> getAllProjects(){
		try {
			List<Project> allProjects = projectDao.getAll();
			return ResponseEntity.status(HttpStatus.OK).body(allProjects);
		}
		catch(Exception ex) {
			return new ResponseEntity<>(null, HttpStatus.INTERNAL_SERVER_ERROR);
		}
	}
	
	
	
	@Transactional
	@RequestMapping(method = RequestMethod.POST, value = { "/project/create" }, consumes = "application/json", produces="application/json")
	public @ResponseBody ResponseEntity<Project> createProject(@RequestBody Project project) {
		Project createdProject = projectDao.update(project);
		return ResponseEntity.status(HttpStatus.CREATED).body(createdProject);
	}
	
	
	
	@RequestMapping(method = RequestMethod.POST, value = { "/project/update" }, consumes = "application/json", produces="application/json")
	public @ResponseBody ResponseEntity<Project> updateProject(@RequestBody Project project) {
		Project updatedProject = projectDao.update(project);
		return ResponseEntity.status(HttpStatus.CREATED).body(updatedProject);
	}
	
	
	@RequestMapping(method = RequestMethod.POST, value = { "/project/delete" }, consumes = "application/json", produces="application/json")
	public @ResponseBody ResponseEntity<Project> delete(@RequestBody Project project) {
		
		Project p = new Project();
		p.setId(project.getId());
		try {
			projectDao.delete(p);
			return ResponseEntity.status(HttpStatus.CREATED).body(null);
		} catch (Exception e) {
			e.printStackTrace();
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(null);
		}
		
	}
	
	
	
	@RequestMapping(method = RequestMethod.POST, value = { "/project/softdelete" }, consumes = "application/json", produces="application/json")
	public @ResponseBody ResponseEntity<Object> softDelete(@RequestBody Project project) {
		
		project.setStatus(new Short("-1"));
		
		try {
			projectDao.update(project);
			return ResponseEntity.status(HttpStatus.CREATED).body(null);
		} catch (Exception e) {
			e.printStackTrace();
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(null);
		}
		
	}
	
	
	@Transactional
	@RequestMapping(method = RequestMethod.POST, value = { "/project/getdmps" }, consumes = "application/json", produces="application/json")
	public @ResponseBody ResponseEntity<Object> getProjectDmps(@RequestBody Project project) {
		try {
			Set<DMP> dmps = projectDao.read(project.getId()).getDmps();
			return ResponseEntity.status(HttpStatus.CREATED).body(dmps);
		} catch (Exception e) {
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(null);
		}	
	}
	
	
	
	////////////////////////////////
	//// USER - RELATED ACTIONS ////
	////////////////////////////////
	
	
	@RequestMapping(method = RequestMethod.GET, value = { "/project/getofuser" }, produces="text/plain")
	public @ResponseBody ResponseEntity<Object> getProjectsOfUser(){
		
		String userID = null;
		try {
			userID = SecurityContextHolder.getContext().getAuthentication().getPrincipal().toString();
		} catch(NullPointerException ex) {
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("You have not logged in. You shouldn't be here");
		}
		
		UserInfo userInfo = userInfoDao.read(UUID.fromString(userID));
		
		if(userInfo==null) //this should normally never happen
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("There's no such a user on the system. You shouldn't be here");
		
		
		try {
			List<Project> userProjects = projectDao.getProjectsOfUser(userID);
			return ResponseEntity.status(HttpStatus.OK).body(userProjects);
		}
		catch(Exception ex) {
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(null);
		}
		
		
		/*
		 * OLD ONE
		Map<UUID, Researcher> userProjects = new HashMap<UUID, Researcher>();
		
		userInfo.getDmps().forEach( dmp -> {
			Researcher proj = dmp.getProject();
			userProjects.put(proj.getId(), proj);
		});
		
		try {
			return ResponseEntity.status(HttpStatus.OK).body(SerializerProvider.toJson(userProjects.values()));	
		}
		catch(Exception ex) {
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("Serialization issue: "+ex.getMessage());
		}
		*/
		
	}
	
	@Transactional
	@RequestMapping(method = RequestMethod.POST, value = { "/project/createofuser" }, produces="text/plain", consumes = "application/json")
	public @ResponseBody ResponseEntity<Project> createProjectOfUser(@RequestBody Project project){
		

		String userID = null;
		try {
			userID = SecurityContextHolder.getContext().getAuthentication().getPrincipal().toString();
		} catch(NullPointerException ex) {
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(null);
		}
		
		UserInfo userInfo = userInfoDao.read(UUID.fromString(userID));
		
		
		if(userInfo==null) //this should normally never happer
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(null);
		
		try {
			
			project.setId(null);
			project.setStatus(new Short("0"));
			project.setCreationUser(userInfo);
			project.setCreated(new Date());
			project.setModified(new Date());
			
			Project newproj = projectDao.create(project);
			
//			DMP newdmp = new DMP();
//			newdmp.setId(null);
//			newdmp.setLabel("Auto-Generated");
//			newdmp.setCreated(new Date());
//			newdmp.setVersion(1);
//			newdmp.setStatus(new Short("0"));
//			newdmp.setProject(newproj);
//			
//			Set<UserInfo> users = new HashSet<UserInfo>();
//			users.add(userInfo);
//			newdmp.setUsers(users);
//			
//			newdmp = dMPDao.create(newdmp); 			
			
			return ResponseEntity.status(HttpStatus.OK).body(newproj);
		}
		catch(Exception ex) {
			ex.printStackTrace();
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(null);
		}

	}
	
//	@Transactional
//	@RequestMapping(method = RequestMethod.POST, value = { "/project/updateofuser" }, produces="text/plain")
//	public @ResponseBody ResponseEntity<Object> updateProjectOfUser(@RequestBody Researcher project){
//		
//		if(project.getId()==null)
//			return ResponseEntity.status(HttpStatus.NOT_MODIFIED).body("Cannot update, id was null");
//		return setProject(project);
//		
//	}
	
	
	
	
	
}