package eu.dnetlib.uoamonitorservice.service;

import eu.dnetlib.uoamonitorservice.dao.CategoryDAO;
import eu.dnetlib.uoamonitorservice.dto.CategoryFull;
import eu.dnetlib.uoamonitorservice.dto.TopicFull;
import eu.dnetlib.uoamonitorservice.entities.Category;
import eu.dnetlib.uoamonitorservice.entities.Topic;
import eu.dnetlib.uoamonitorservice.handlers.EntityNotFoundException;
import eu.dnetlib.uoamonitorservice.handlers.PathNotValidException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.access.method.P;
import org.springframework.stereotype.Service;

import java.util.stream.Collectors;

@Service
public class CategoryService {

    private final CategoryDAO dao;

    private final SubCategoryService subCategoryService;
    private final CommonService commonService;

    @Autowired
    public CategoryService(SubCategoryService subCategoryService, CommonService commonService, CategoryDAO dao) {
        this.subCategoryService = subCategoryService;
        this.commonService = commonService;
        this.dao = dao;
    }

    public Category findByPath(Topic topic, String categoryId, String message) {
        if (!topic.getCategories().contains(categoryId)) {
            throw new PathNotValidException(message + ": Category with id: " + categoryId + " not found in Topic: " + topic.getId());
        }
        return this.dao.findById(categoryId).orElseThrow(() -> new EntityNotFoundException(message + ": Category with id: " + categoryId + " not found"));
    }

    public CategoryFull getFullCategory(String type, String alias, String categoryId) {
        Category category = this.find(categoryId);
        if(commonService.hasVisibilityAuthority(type, alias, category)) {
            return  new CategoryFull(category, category.getSubCategories().stream()
                    .map(subCategoryId -> this.subCategoryService.getFullSubCategory(type, alias, subCategoryId))
                    .collect(Collectors.toList()));
        } else {
            return null;
        }
    }

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