package enseirb.myinpulse.service.database;

import enseirb.myinpulse.model.Annotation;
import enseirb.myinpulse.model.Appointment;
import enseirb.myinpulse.model.Project;
import enseirb.myinpulse.model.SectionCell;
import enseirb.myinpulse.repository.SectionCellRepository;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Service;
import org.springframework.web.server.ResponseStatusException;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;

@Service
public class SectionCellService {

    protected static final Logger logger = LogManager.getLogger();

    private final SectionCellRepository sectionCellRepository;

    @Autowired
    SectionCellService(SectionCellRepository sectionCellRepository) {
        this.sectionCellRepository = sectionCellRepository;
    }

    public Iterable<SectionCell> getAllSectionCells() {
        return this.sectionCellRepository.findAll();
    }

    public SectionCell getSectionCellById(Long id) {
        Optional<SectionCell> sectionCell = this.sectionCellRepository.findById(id);
        if (sectionCell.isEmpty()) {
            logger.error("getSectionCellById : No sectionCell found with id {}", id);
            throw new ResponseStatusException(
                    HttpStatus.NOT_FOUND, "Cette cellule de section n'existe pas");
        }
        return sectionCell.get();
    }

    public SectionCell addNewSectionCell(SectionCell sectionCell) {
        return this.sectionCellRepository.save(sectionCell);
    }

    public void removeSectionCellById(Long id) {
        this.sectionCellRepository.deleteById(id);
    }

    public void updateSectionCellReferenceId(Long idSectionCell, Long referenceId) {
        SectionCell sectionCell = this.getSectionCellById(idSectionCell);
        sectionCell.setIdReference(referenceId);
        this.sectionCellRepository.save(sectionCell);
    }

    public void updateSectionCellContent(long idSectionCell, String content) {
        SectionCell sectionCell = getSectionCellById(idSectionCell);
        sectionCell.setContentSectionCell(content);
        this.sectionCellRepository.save(sectionCell);
    }

    public void updateSectionCellListAppointment(long idSectionCell, Appointment appointment) {
        SectionCell sectionCell = getSectionCellById(idSectionCell);
        sectionCell.updateAppointmentSectionCell(appointment);
        this.sectionCellRepository.save(sectionCell);
    }

    public void updateSectionCellListAnnotation(long idSectionCell, Annotation annotation) {
        SectionCell sectionCell = getSectionCellById(idSectionCell);
        sectionCell.updateListAnnotation(annotation);
        this.sectionCellRepository.save(sectionCell);
    }

    public void updateSectionCellProject(long idSectionCell, Project project) {
        SectionCell sectionCell = getSectionCellById(idSectionCell);
        sectionCell.setProjectSectionCell(project);
        this.sectionCellRepository.save(sectionCell);
    }

    public SectionCell updateSectionCell(
            Long id,
            String contentSectionCell,
            Appointment appointment,
            Annotation annotation,
            Project project) {
        Optional<SectionCell> sectionCell = this.sectionCellRepository.findById(id);
        if (sectionCell.isEmpty()) {
            logger.error("updateSectionCell : No sectionCell found with id {}", id);
            throw new ResponseStatusException(
                    HttpStatus.NOT_FOUND, "Cette cellule de section n'existe pas");
        }
        if (contentSectionCell != null) {
            sectionCell.get().setContentSectionCell(contentSectionCell);
            sectionCell.get().setModificationDate(LocalDateTime.now());
        }
        if (appointment != null) {
            sectionCell.get().updateAppointmentSectionCell(appointment);
            sectionCell.get().setModificationDate(LocalDateTime.now());
        }
        if (annotation != null) {
            sectionCell.get().updateListAnnotation(annotation);
            sectionCell.get().setModificationDate(LocalDateTime.now());
        }
        if (project != null) {
            sectionCell.get().setProjectSectionCell(project);
            sectionCell.get().setModificationDate(LocalDateTime.now());
        }
        return this.sectionCellRepository.save(sectionCell.get());
    }

    public Iterable<SectionCell> getSectionCellsByProject(Project project, Long sectionId) {
        return this.sectionCellRepository.findByProjectSectionCellAndSectionId(project, sectionId);
    }

    public Long getProjectId(Long sectionCellId) {
        SectionCell sectionCell = getSectionCellById(sectionCellId);
        Project sectionProject = sectionCell.getProjectSectionCell();
        return sectionProject.getIdProject();
    }

    public List<Appointment> getAppointmentsBySectionCellId(Long sectionCellId) {
        SectionCell sectionCell = getSectionCellById(sectionCellId);
        return sectionCell.getAppointmentSectionCell();
    }

    public Iterable<SectionCell> getSectionCellsByProjectAndSectionIdBeforeDate(
            Project project, long sectionId, LocalDateTime date) {
        return sectionCellRepository.findByProjectSectionCellAndSectionIdAndModificationDateBefore(
                project, sectionId, date);
    }

    public Iterable<SectionCell> getLatestSectionCellsByIdReferenceBeforeDate(
            Project project, long sectionId, LocalDateTime date) {

        // 1. Fetch ALL relevant SectionCells modified before the date
        Iterable<SectionCell> allMatchingCells =
                sectionCellRepository.findByProjectSectionCellAndSectionIdAndModificationDateBefore(
                        project, sectionId, date);

        // 2. Find the latest for each idReference
        Map<Long, SectionCell> latestCellsByIdReference = new HashMap<>();

        for (SectionCell cell : allMatchingCells) {
            Long idReference = cell.getIdReference();

            // Check if we've seen this idReference before
            if (latestCellsByIdReference.containsKey(idReference)) {
                // If yes, compare modification dates
                SectionCell existingLatest = latestCellsByIdReference.get(idReference);

                // If the current cell is more recent, update the map
                if (cell.getModificationDate().isAfter(existingLatest.getModificationDate())) {
                    latestCellsByIdReference.put(idReference, cell);
                }
            } else {
                // If this is the first time we see this idReference, add it to the map
                latestCellsByIdReference.put(idReference, cell);
            }
        }

        // 3. Return the collection of the latest cells (the values from the map)
        return latestCellsByIdReference.values();
    }
}