package rest.entities;

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 com.fasterxml.jackson.datatype.hibernate5.Hibernate5Module;

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

	// MANAGE PROJECT(S)
	
	@RequestMapping(method = RequestMethod.GET, value = { "/projects" }, produces="application/json")
	public @ResponseBody ResponseEntity<Object> listProjects(){
		try {
			List<UUID> allIDs = projectDao.listAllIDs();
			return ResponseEntity.status(HttpStatus.OK).body(SerializerProvider.toJson(allIDs));
		}
		catch(Exception ex) {
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("Serialization issue: "+ex.getMessage());
		}
	}
	
	@RequestMapping(method = RequestMethod.GET, value = { "/projects/{id}" }, produces="application/json")
	public @ResponseBody ResponseEntity<Object> 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(SerializerProvider.toJson(project));
		}
		catch(Exception ex) {
			return ResponseEntity.status(HttpStatus.BAD_REQUEST).body("Erroneous input: "+ex.getMessage());
		}
	}
	
	
	@RequestMapping(method = RequestMethod.GET, value = { "/project/listAllLabelIDs" }, produces="application/json")
	public @ResponseBody ResponseEntity<Object> 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("Serialization issue: "+ex.getMessage());
		}
	}
	
	
	@RequestMapping(method = RequestMethod.GET, value = { "/project/getAll" }, produces="application/json")
	public @ResponseBody ResponseEntity<Object> getAllProjects(){
		try {
			List<Project> allProjects = projectDao.getAll();
			return new ResponseEntity<Object>(SerializerProvider.toJson(allProjects), HttpStatus.OK);
		}
		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<Object> setProject(@RequestBody Project project) {
		Project createdProject = projectDao.update(project);
		return ResponseEntity.status(HttpStatus.CREATED).body(createdProject);
	}
	
	
	@RequestMapping(method = RequestMethod.POST, value = { "/project/delete" }, consumes = "application/json", produces="application/json")
	public @ResponseBody ResponseEntity<Object> delete(@RequestBody Project project) {
		
		Project p = new Project();
		p.setId(project.getId());
		try {
			projectDao.delete(p);
			return ResponseEntity.status(HttpStatus.CREATED).body("{\"msg\":\"Deleted Project entity!\"}");
		} catch (Exception e) {
			e.printStackTrace();
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("{\"msg\":\"Could not Delete Project!\"}");
		}
		
	}
	
	
	@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(SerializerProvider.toJson(dmps));
		} catch (Exception e) {
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("{\"msg\":\"Could not create Project!\"}");
		}	
	}
	
	
	
	////////////////////////////////
	//// 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");
		
		
		Map<UUID, Project> userProjects = new HashMap<UUID, Project>();
		
		userInfo.getDmps().forEach( dmp -> {
			Project 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")
	public @ResponseBody ResponseEntity<Object> 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("You have not logged in. You shouldn't be here");
		}
		
		UserInfo userInfo = userInfoDao.read(UUID.fromString(userID));
		
		
		if(userInfo==null) //this should normally never happer
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("There's no such a user on the system. You shouldn't be here");
		
		try {
			
			project.setId(null);
			
			Project newproj = projectDao.create(project);
			
			DMP newdmp = new DMP();
			newdmp.setId(null);
			newdmp.setLabel("Auto-Generated");
			newdmp.setVersion(1);
			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(SerializerProvider.toJson(newproj));	
		}
		catch(Exception ex) {
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("Serialization issue: "+ex.getMessage());
		}

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