package rest.entities;

import java.util.List;
import java.util.Map;
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.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.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;

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 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 helpers.SerializerProvider;
import helpers.Transformers;
import proxy.config.exceptions.HugeResultSet;
import proxy.config.exceptions.NoURLFound;
import proxy.fetching.RemoteFetcher;
import responses.RestResponse;


@RestController
@CrossOrigin
public class Researchers  {
	
	@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 RemoteFetcher remoteFetcher;
	
	
	@RequestMapping(method = RequestMethod.GET, value = { "/external/researchers" }, produces="application/json;charset=UTF-8")
	public @ResponseBody ResponseEntity<Object> listExternalResearchers(@RequestParam(value="query", required=false) String query ){
		try {
			List<Map<String,String>> remoteRepos = remoteFetcher.getResearchers(query);
			return ResponseEntity.status(HttpStatus.OK).body(SerializerProvider.toJson(remoteRepos));
		}
		catch(NoURLFound ex) {
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("{\"reason\":\""+ex.getMessage()+"\"}");
		}
		catch(HugeResultSet ex) {
			return ResponseEntity.status(HttpStatus.UNPROCESSABLE_ENTITY).body("{\"reason\":\""+ex.getMessage()+"\"}"); //the ex.getMessage has the appropriate text description
		}
	}
	
	
	// MANAGE RESEARCHER(S)

	@RequestMapping(method = RequestMethod.GET, value = { "/researchers" })
	public @ResponseBody ResponseEntity<Object> listResearchers(){
		try {
			List<UUID> allIDs = researcherDao.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 = { "/researchers/{id}" })
	public @ResponseBody ResponseEntity<Object> getResearchers(@PathVariable("id") String id) {
		try {
			Researcher researcher = researcherDao.read(UUID.fromString(id));
			return ResponseEntity.status(HttpStatus.OK).body(SerializerProvider.toJson(researcher));
		}
		catch(Exception ex) {
			return ResponseEntity.status(HttpStatus.BAD_REQUEST).body("Erroneous input: "+ex.getMessage());
		}
	}
	
	@RequestMapping(method = RequestMethod.GET, value = { "/researcher/getByEmail" }, produces="application/json;charset=UTF-8")
	public @ResponseBody ResponseEntity<Object> getResearcherByEmail(@RequestParam("email") String email){
		try {
			Researcher researcher = researcherDao.getResearcherByEmail(email);
			return ResponseEntity.status(HttpStatus.OK).body(SerializerProvider.toJson(researcher));
		}
		catch(Exception ex) {
			return ResponseEntity.status(HttpStatus.BAD_REQUEST).body("Erroneous input: "+ex.getMessage());
		}
		
	}
	

	@RequestMapping(method = RequestMethod.GET, value = { "/researcher/getAll" }, produces="application/json;charset=UTF-8")
	public @ResponseBody ResponseEntity<Object> getAllResearchers(){
		try {
			List<Researcher> allResearchers = researcherDao.getAll();
			
			return new ResponseEntity<Object>(SerializerProvider.toJson(allResearchers), HttpStatus.OK);
			
		}
		catch(Exception ex) {
			return new ResponseEntity<>(null, HttpStatus.INTERNAL_SERVER_ERROR);
		}
	}
	
	
	@Transactional
	@RequestMapping(method = RequestMethod.POST, value = { "/researcher/create" }, consumes = "application/json", produces="application/json;charset=UTF-8")
	public @ResponseBody ResponseEntity<Object> setResearcher(@RequestBody Researcher researcher) {
		Researcher createdResearcher = researcherDao.update(researcher);
		try {
			return ResponseEntity.status(HttpStatus.CREATED).body(SerializerProvider.toJson(createdResearcher));
		} catch (Exception e) {
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("{\"msg\":\"Could not create researcher!\"}");
		}	
	}
	
	
	@RequestMapping(method = RequestMethod.POST, value = { "/researcher/delete" }, consumes = "application/json", produces="text/plain")
	public @ResponseBody ResponseEntity<Object> delete(@RequestBody Researcher researcher) {
		
		Researcher res = new Researcher();
		res.setId(researcher.getId());
		try {
			researcherDao.delete(res);
			return ResponseEntity.status(HttpStatus.CREATED).body("{\"msg\":\"Deleted researcher!\"}");
		} catch (Exception e) {
			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("{\"msg\":\"Could not delete researcher!\"}");
		}
		
	}
	
	
	
	
}