package eu.eudat.controllers;

import eu.eudat.audit.AuditableAction;
import eu.eudat.authorization.AuthorizationFlags;
import eu.eudat.commons.enums.DmpAccessType;
import eu.eudat.commons.enums.DmpStatus;
import eu.eudat.commons.enums.IsActive;
import eu.eudat.convention.ConventionService;
import eu.eudat.data.StorageFileEntity;
import eu.eudat.model.*;
import eu.eudat.model.builder.PublicDescriptionBuilder;
import eu.eudat.model.persist.DescriptionFieldFilePersist;
import eu.eudat.model.persist.DescriptionSectionPermissionResolver;
import eu.eudat.service.storage.StorageFileService;
import gr.cite.tools.validation.ValidationFilterAnnotation;
import eu.eudat.model.builder.DescriptionBuilder;
import eu.eudat.model.censorship.DescriptionCensor;
import eu.eudat.model.censorship.PublicDescriptionCensor;
import eu.eudat.model.persist.DescriptionPersist;
import eu.eudat.model.persist.DescriptionStatusPersist;
import eu.eudat.model.persist.UpdateDescriptionTemplatePersist;
import eu.eudat.model.result.QueryResult;
import eu.eudat.query.DescriptionQuery;
import eu.eudat.query.DmpQuery;
import eu.eudat.query.lookup.DescriptionLookup;
import eu.eudat.service.description.DescriptionService;
import eu.eudat.service.elastic.ElasticQueryHelperService;
import gr.cite.tools.auditing.AuditService;
import gr.cite.tools.data.builder.BuilderFactory;
import gr.cite.tools.data.censor.CensorFactory;
import gr.cite.tools.data.query.QueryFactory;
import gr.cite.tools.exception.MyApplicationException;
import gr.cite.tools.exception.MyForbiddenException;
import gr.cite.tools.exception.MyNotFoundException;
import gr.cite.tools.fieldset.FieldSet;
import gr.cite.tools.logging.LoggerService;
import gr.cite.tools.logging.MapLogEntry;
import org.slf4j.LoggerFactory;
import org.springframework.context.MessageSource;
import org.springframework.context.i18n.LocaleContextHolder;
import org.springframework.core.io.ByteArrayResource;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.management.InvalidApplicationException;
import java.io.IOException;
import java.util.*;

import static eu.eudat.authorization.AuthorizationFlags.Public;

@RestController
@RequestMapping(path = "api/description")
public class DescriptionController {

    private static final LoggerService logger = new LoggerService(LoggerFactory.getLogger(DescriptionController.class));

    private final BuilderFactory builderFactory;

    private final AuditService auditService;

    private final DescriptionService descriptionService;

    private final CensorFactory censorFactory;

    private final QueryFactory queryFactory;

    private final MessageSource messageSource;
    private final ElasticQueryHelperService elasticQueryHelperService;
    private final StorageFileService storageFileService;
    private final ConventionService conventionService;
    public DescriptionController(
		    BuilderFactory builderFactory,
		    AuditService auditService,
		    DescriptionService descriptionService,
		    CensorFactory censorFactory,
		    QueryFactory queryFactory,
		    MessageSource messageSource,
		    ElasticQueryHelperService elasticQueryHelperService, StorageFileService storageFileService, ConventionService conventionService) {
        this.builderFactory = builderFactory;
        this.auditService = auditService;
        this.descriptionService = descriptionService;
        this.censorFactory = censorFactory;
        this.queryFactory = queryFactory;
        this.messageSource = messageSource;
        this.elasticQueryHelperService = elasticQueryHelperService;
	    this.storageFileService = storageFileService;
	    this.conventionService = conventionService;
    }

    @PostMapping("public/query")
    public QueryResult<PublicDescription> publicQuery(@RequestBody DescriptionLookup lookup) throws MyApplicationException, MyForbiddenException {
        logger.debug("querying {}", PublicDescription.class.getSimpleName());

        this.censorFactory.censor(PublicDescriptionCensor.class).censor(lookup.getProject());

        //DescriptionQuery query = lookup.enrich(this.queryFactory).authorize(EnumSet.of(Public)).dmpSubQuery(this.queryFactory.query(DmpQuery.class).isActive(IsActive.Active).statuses(DmpStatus.Finalized).accessTypes(DmpAccessType.Public));
        QueryResult<PublicDescription> queryResult = this.elasticQueryHelperService.collectPublic(lookup, EnumSet.of(Public), null);
        
        this.auditService.track(AuditableAction.Description_PublicQuery, "lookup", lookup);

        return queryResult;
    }

    @GetMapping("public/{id}")
    public PublicDescription publicGet(@PathVariable("id") UUID id, FieldSet fieldSet, Locale locale) throws MyApplicationException, MyForbiddenException, MyNotFoundException {
        logger.debug(new MapLogEntry("retrieving" + PublicDescription.class.getSimpleName()).And("id", id).And("fields", fieldSet));

        this.censorFactory.censor(PublicDescriptionCensor.class).censor(fieldSet);

        DescriptionQuery query =  this.queryFactory.query(DescriptionQuery.class).authorize(EnumSet.of(Public)).ids(id).dmpSubQuery(this.queryFactory.query(DmpQuery.class).isActive(IsActive.Active).statuses(DmpStatus.Finalized).accessTypes(DmpAccessType.Public));

        PublicDescription model = this.builderFactory.builder(PublicDescriptionBuilder.class).authorize(EnumSet.of(Public)).build(fieldSet, query.firstAs(fieldSet));
        if (model == null) throw new MyNotFoundException(messageSource.getMessage("General_ItemNotFound", new Object[]{id, PublicDescription.class.getSimpleName()}, LocaleContextHolder.getLocale()));

        this.auditService.track(AuditableAction.Description_PublicLookup, Map.ofEntries(
                new AbstractMap.SimpleEntry<String, Object>("id", id),
                new AbstractMap.SimpleEntry<String, Object>("fields", fieldSet)
        ));

        return model;
    }

    @PostMapping("query")
    public QueryResult<Description> query(@RequestBody DescriptionLookup lookup) throws MyApplicationException, MyForbiddenException {
        logger.debug("querying {}", Description.class.getSimpleName());

        this.censorFactory.censor(DescriptionCensor.class).censor(lookup.getProject(), null);

        QueryResult<Description> queryResult = this.elasticQueryHelperService.collect(lookup, AuthorizationFlags.OwnerOrDmpAssociatedOrPermission, null);

        this.auditService.track(AuditableAction.Description_Query, "lookup", lookup);

        return queryResult;
    }


    @GetMapping("{id}")
    public Description get(@PathVariable("id") UUID id, FieldSet fieldSet, Locale locale) throws MyApplicationException, MyForbiddenException, MyNotFoundException {
        logger.debug(new MapLogEntry("retrieving" + Description.class.getSimpleName()).And("id", id).And("fields", fieldSet));

        this.censorFactory.censor(DescriptionCensor.class).censor(fieldSet, null);

        DescriptionQuery query = this.queryFactory.query(DescriptionQuery.class).authorize(AuthorizationFlags.OwnerOrDmpAssociatedOrPermission).ids(id);
        Description model = this.builderFactory.builder(DescriptionBuilder.class).authorize(AuthorizationFlags.OwnerOrDmpAssociatedOrPermission).build(fieldSet, query.firstAs(fieldSet));
        if (model == null)
            throw new MyNotFoundException(messageSource.getMessage("General_ItemNotFound", new Object[]{id, Description.class.getSimpleName()}, LocaleContextHolder.getLocale()));

        this.auditService.track(AuditableAction.Description_Lookup, Map.ofEntries(
                new AbstractMap.SimpleEntry<String, Object>("id", id),
                new AbstractMap.SimpleEntry<String, Object>("fields", fieldSet)
        ));

        return model;
    }

    @PostMapping("persist")
    @Transactional
    @ValidationFilterAnnotation(validator = DescriptionPersist.DescriptionPersistValidator.ValidatorName, argumentName = "model")
    public Description persist(@RequestBody DescriptionPersist model, FieldSet fieldSet) throws MyApplicationException, MyForbiddenException, MyNotFoundException, InvalidApplicationException, IOException {
        logger.debug(new MapLogEntry("persisting" + Description.class.getSimpleName()).And("model", model).And("fieldSet", fieldSet));
        Description persisted = this.descriptionService.persist(model, fieldSet);

        this.auditService.track(AuditableAction.Description_Persist, Map.ofEntries(
                new AbstractMap.SimpleEntry<String, Object>("model", model),
                new AbstractMap.SimpleEntry<String, Object>("fields", fieldSet)
        ));

        return persisted;
    }

    @PostMapping("persist-status")
    @Transactional
    @ValidationFilterAnnotation(validator = DescriptionStatusPersist.DescriptionStatusPersistValidator.ValidatorName, argumentName = "model")
    public Description persistStatus(@RequestBody DescriptionStatusPersist model, FieldSet fieldSet) throws MyApplicationException, MyForbiddenException, MyNotFoundException, IOException, InvalidApplicationException {
        logger.debug(new MapLogEntry("persisting" + Description.class.getSimpleName()).And("model", model).And("fieldSet", fieldSet));
        Description persisted = this.descriptionService.persistStatus(model, fieldSet);

        this.auditService.track(AuditableAction.Description_PersistStatus, Map.ofEntries(
                new AbstractMap.SimpleEntry<String, Object>("model", model),
                new AbstractMap.SimpleEntry<String, Object>("fields", fieldSet)
        ));

        return persisted;
    }

    @PostMapping("get-description-section-permissions")
    @ValidationFilterAnnotation(validator = DescriptionSectionPermissionResolver.DescriptionSectionPermissionResolverPersistValidator.ValidatorName, argumentName = "model")
    public Map<UUID, List<String>> getDescriptionSectionPermissions(@RequestBody DescriptionSectionPermissionResolver model) {
        logger.debug(new MapLogEntry("persisting" + Description.class.getSimpleName()).And("model", model));
        Map<UUID, List<String>> persisted = this.descriptionService.getDescriptionSectionPermissions(model);

        this.auditService.track(AuditableAction.Description_GetDescriptionSectionPermissions, Map.ofEntries(
                new AbstractMap.SimpleEntry<String, Object>("model", model)
        ));

        return persisted;
    }

    @GetMapping("validate")
    public List<DescriptionValidationResult> validate(@RequestParam(value="descriptionIds") List<UUID> descriptionIds) throws MyApplicationException, MyForbiddenException, MyNotFoundException, InvalidApplicationException {
        logger.debug(new MapLogEntry("validating" + Description.class.getSimpleName()).And("descriptionIds", descriptionIds));

        this.censorFactory.censor(DescriptionCensor.class).censor(null, null);

        List<DescriptionValidationResult> descriptionValidationResults = this.descriptionService.validate(descriptionIds);

        this.auditService.track(AuditableAction.Description_Validate, Map.ofEntries(
                new AbstractMap.SimpleEntry<String, Object>("descriptionIds", descriptionIds)
        ));

        return descriptionValidationResults;
    }

    @DeleteMapping("{id}")
    @Transactional
    public void delete(@PathVariable("id") UUID id) throws MyForbiddenException, InvalidApplicationException, IOException {
        logger.debug(new MapLogEntry("retrieving" + Description.class.getSimpleName()).And("id", id));

        this.descriptionService.deleteAndSave(id);

        this.auditService.track(AuditableAction.Description_Delete, "id", id);
    }

    @GetMapping("{id}/export/{type}")
    public ResponseEntity<byte[]> export(@PathVariable("id") UUID id, @PathVariable("type") String exportType) throws InvalidApplicationException, IOException {
        logger.debug(new MapLogEntry("exporting description"));

        return this.descriptionService.export(id, exportType);
    }

    @PostMapping("field-file/upload")
    @Transactional
    @ValidationFilterAnnotation(validator = DescriptionFieldFilePersist.PersistValidator.ValidatorName, argumentName = "model")
    public StorageFile uploadFieldFiles(@RequestParam("file") MultipartFile file, @RequestParam("model") DescriptionFieldFilePersist model, FieldSet fieldSet) throws IOException {
        logger.debug(new MapLogEntry("uploadFieldFiles" + Description.class.getSimpleName()).And("model", model).And("fieldSet", fieldSet));
        StorageFile persisted = this.descriptionService.uploadFieldFile(model, file, fieldSet);

        this.auditService.track(AuditableAction.Description_UploadFieldFiles, Map.ofEntries(
                new AbstractMap.SimpleEntry<String, Object>("model", model),
                new AbstractMap.SimpleEntry<String, Object>("fields", fieldSet)
        ));

        return persisted;
    }

    @GetMapping("{id}/field-file/{fileId}")
    public ResponseEntity<ByteArrayResource> getFieldFile(@PathVariable("id") UUID id, @PathVariable("fileId") UUID fileId) throws MyApplicationException, MyForbiddenException, MyNotFoundException {
        logger.debug(new MapLogEntry("get Field File" + Description.class.getSimpleName()).And("id", id).And("fileId", fileId));

        StorageFileEntity storageFile = this.descriptionService.getFieldFile(id, fileId);

        byte[] file = this.storageFileService.readAsBytesSafe(id);
        if (file == null) throw new MyNotFoundException(messageSource.getMessage("General_ItemNotFound", new Object[]{id, StorageFile.class.getSimpleName()}, LocaleContextHolder.getLocale()));

        this.auditService.track(AuditableAction.Description_GetFieldFile, Map.ofEntries(
                new AbstractMap.SimpleEntry<String, Object>("id", id)
        ));

        String contentType = storageFile.getMimeType();
        if (this.conventionService.isNullOrEmpty(contentType)) contentType = MediaType.APPLICATION_OCTET_STREAM_VALUE;

        return ResponseEntity.ok()
                .contentType(MediaType.valueOf(contentType))
                .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"" + storageFile.getName() + (storageFile.getExtension().startsWith(".") ? "" : ".") + storageFile.getExtension()  + "\"")
                .body(new ByteArrayResource(file));
    }

    @PostMapping("update-description-template")
//    @Transactional
    @ValidationFilterAnnotation(validator = UpdateDescriptionTemplatePersist.UpdateDescriptionTemplatePersistValidator.ValidatorName, argumentName = "model")
    public Boolean updateDescriptionTemplate(@RequestBody UpdateDescriptionTemplatePersist model) throws MyApplicationException, MyForbiddenException, MyNotFoundException, InvalidApplicationException, IOException {
        logger.debug(new MapLogEntry("persisting" + Description.class.getSimpleName()).And("model", model));

        // TODO

        return true;
    }
}