package eu.dnetlib.uoamonitorservice.service;

import eu.dnetlib.uoaadmintoolslibrary.handlers.ForbiddenException;
import eu.dnetlib.uoamonitorservice.dao.SectionDAO;
import eu.dnetlib.uoamonitorservice.dao.SubCategoryDAO;
import eu.dnetlib.uoamonitorservice.dto.SectionFull;
import eu.dnetlib.uoamonitorservice.entities.Indicator;
import eu.dnetlib.uoamonitorservice.entities.Section;
import eu.dnetlib.uoamonitorservice.handlers.EntityNotFoundException;
import eu.dnetlib.uoamonitorservice.primitives.Visibility;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.stream.Collectors;

@Service
public class SectionService {

    private final SubCategoryDAO subCategoryDAO;
    private final SectionDAO dao;

    private final IndicatorService indicatorService;
    private final CommonService commonService;

    @Autowired
    public SectionService(SubCategoryDAO subCategoryDAO, SectionDAO dao, IndicatorService indicatorService, CommonService commonService) {
        this.subCategoryDAO = subCategoryDAO;
        this.dao = dao;
        this.indicatorService = indicatorService;
        this.commonService = commonService;
    }

    public SectionFull changeVisibilityTree(String sectionId, Visibility visibility) {
        Section section = this.find(sectionId);
        SectionFull sectionFull = new SectionFull(section, section.getIndicators().stream().map(this.indicatorService::find).collect(Collectors.toList()));
        sectionFull.setIndicators(sectionFull.getIndicators().stream().map(indicator -> {
            indicator.setVisibility(visibility);
            return indicatorService.save(indicator);
        }).collect(Collectors.toList()));
        return sectionFull;
    }

    public SectionFull saveSection(SectionFull sectionFull) {
        Section section = new Section(sectionFull);
        if(section.getId() != null) {
            section.setIndicators(this.getIndicatorsId(section.getId()));
        }
        return sectionFull;
    }

    public Section find(String id) {
        return dao.findById(id).orElseThrow(() -> new EntityNotFoundException("Section with id: " + id + " not found"));
    }

    public SectionFull getFullSection(String type, String alias, String id) {
        Section section = this.find(id);
        return new SectionFull(section, section.getIndicators().stream()
                .map(indicatorId -> this.indicatorService.getIndicator(type, alias, indicatorId))
                .collect(Collectors.toList()));
    }

    public List<Indicator> getIndicators(String id) {
        Section section = this.find(id);
        return section.getIndicators().stream().map(this.indicatorService::find).collect(Collectors.toList());
    }

    public List<String> getIndicatorsId(String id) {
        return this.getIndicators(id).stream().map(Indicator::getId).collect(Collectors.toList());
    }

    public SectionFull buildSection(SectionFull sectionFull) {
        sectionFull.setIndicators(sectionFull.getIndicators().stream().map(this.indicatorService::save).collect(Collectors.toList()));
        Section section = this.save(new Section(sectionFull));
        return new SectionFull(section, sectionFull.getIndicators());
    }

    public Section save(Section section) {
        section.getIndicators().forEach(this.indicatorService::find);
        return this.dao.save(section);
    }

    public void delete(String type, Section section, boolean remove) {
        if(this.commonService.hasDeleteAuthority(type)) {
            this.dao.findByDefaultId(section.getId()).forEach(child -> {
                this.delete(type, child.getId(), remove);
            });
            section.getIndicators().forEach(indicatorId -> {
                this.indicatorService.delete(type, indicatorId, false);
            });
            if (remove) {
                this.removeSection(section.getId());
            }
            this.dao.delete(section);
        } else {
            throw new ForbiddenException("Delete section: You are not authorized to delete section with id: " + section.getId());
        }
    }

    public void delete(String type, String id, boolean remove) {
        Section section = this.find(id);
        this.delete(type, section, remove);
    }

    public void removeSection(String id) {
        this.subCategoryDAO.findByNumbersContaining(id).forEach(subCategory -> {
            subCategory.getNumbers().remove(id);
            this.subCategoryDAO.save(subCategory);
        });
        this.subCategoryDAO.findByChartsContaining(id).forEach(subCategory -> {
            subCategory.getCharts().remove(id);
            this.subCategoryDAO.save(subCategory);
        });
    }

    public SectionFull changeVisibility(String type, String alias, String id, Visibility visibility) {
        if(this.commonService.hasEditAuthority(type, alias)) {
            SectionFull sectionFull = this.getFullSection(type, alias, id);
            sectionFull.setIndicators(sectionFull.getIndicators().stream()
                    .map(category -> this.indicatorService.changeVisibility(type, alias, category.getId(), visibility))
                    .collect(Collectors.toList()));
            Section section = this.save(new Section(sectionFull));
            sectionFull.update(section);
            return sectionFull;
        } else {
            throw new ForbiddenException("Change section visibility: You are not authorized to update section with id: " + id);
        }
    }
}