package eu.dnetlib.uoamonitorservice.controllers;

import eu.dnetlib.uoamonitorservice.entities.*;
import eu.dnetlib.uoamonitorservice.service.*;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.web.bind.annotation.*;

@RestController
@CrossOrigin(origins = "*")
public class SectionController {
    private final Logger log = LogManager.getLogger(this.getClass());

    private final StakeholderService stakeholderService;
    private final TopicService topicService;
    private final CategoryService categoryService;
    private final SubCategoryService subCategoryService;
    private final SectionService sectionService;

    @Autowired
    public SectionController(StakeholderService stakeholderService, TopicService topicService, CategoryService categoryService,
                             SubCategoryService subCategoryService, SectionService sectionService) {
        this.stakeholderService = stakeholderService;
        this.topicService = topicService;
        this.categoryService = categoryService;
        this.subCategoryService = subCategoryService;
        this.sectionService = sectionService;
    }

    /*@PreAuthorize("isAuthenticated()")
    @RequestMapping(value = "/{stakeholderId}/{topicId}/{categoryId}/{subcategoryId}/save/{index}", method = RequestMethod.POST)
    public Section saveSection(@PathVariable("stakeholderId") String stakeholderId,
                               @PathVariable("topicId") String topicId,
                               @PathVariable("categoryId") String categoryId,
                               @PathVariable("subcategoryId") String subcategoryId,
                               @PathVariable("index") String index,
                               @RequestBody Section<Indicator> sectionFull) {
        log.debug("save section");
        log.debug("Name: "+sectionFull.getTitle() + " - Id: "+sectionFull.getId() + " - Stakeholder: "+stakeholderId + " - Topic: "+topicId + " - Category: "+categoryId+ " - SubCategory: "+subcategoryId);

        SubCategory<String> subCategory = checkForExceptions(stakeholderId, topicId, categoryId, subcategoryId);

        Section<String> section = new Section<>(sectionFull);

        Date date = new Date();
        section.setUpdateDate(date);
        sectionFull.setUpdateDate(date);

        List<String> indicators = new ArrayList<>();

        Section<String> oldSection = null;
        if(sectionFull.getId() != null) {
            oldSection = sectionDAO.findById(sectionFull.getId());
            if(oldSection == null) {
                // EXCEPTION - Section not found
                throw new EntityNotFoundException("save section: Section with id: " + sectionFull.getId() + " not found");
            }

            for(String indicatorId : oldSection.getIndicators()) {
                Indicator indicator = indicatorDAO.findById(indicatorId);
                if (indicator == null) {
                    // EXCEPTION - Indicator not found
                    throw new EntityNotFoundException("Save section: Indicator with id: "+indicatorId+" not found (indicator exists in section: "+section.getId()+")");
                }
                indicators.add(indicator.getId());
            }
        } else { // section does not exist in DB
            section.setCreationDate(date);
            sectionFull.setCreationDate(date);

            for(Indicator indicator : sectionFull.getIndicators()) {
                indicators.add(indicator.getId());
            }
        }

        String sectionId = sectionFull.getId();

        section.setIndicators(indicators);

        Stakeholder<String> stakeholder = stakeholderDAO.findById(stakeholderId);
        // this section belongs in default profile and it is new or it is updated
        if(stakeholder.getDefaultId() == null) {
            if(sectionId == null) {
                sectionDAO.save(section);
                onSaveDefaultSection(section, topicId, categoryId, subcategoryId, stakeholder);
            }
            else {
                onUpdateDefaultSection(section, stakeholder, oldSection);
                sectionDAO.save(section);
            }
        } else {
            sectionDAO.save(section);
        }

        List<String> sections = null;
        if(sectionFull.getType().equals("chart")) {
            sections = subCategory.getCharts();
        } else if(sectionFull.getType().equals("number")) {
            sections = subCategory.getNumbers();
        }

        int existing_index = sections.indexOf(section.getId());
        if (existing_index == -1) {
            if(Integer.parseInt(index) != -1) {
                sections.add(Integer.parseInt(index), section.getId());
            } else {
                sections.add(section.getId());
            }
            subCategoryDAO.save(subCategory);
            log.debug("Section saved!");

            sectionFull.setId(section.getId());
        }

        return sectionFull;
    }

    public void onSaveDefaultSection(Section section,
                                     String defaultTopicId, String defaultCategoryId,
                                     String defaultSubcategoryId, Stakeholder defaultStakeholder) {
        log.debug("On save default section");


        // new section in default profile - add it on profiles of the same type
        List<SubCategory> subCategories = subCategoryDAO.findByDefaultId(defaultSubcategoryId);

        for (SubCategory subCategory : subCategories) {
            Category parentCategory = categoryDAO.findBySubCategoriesContaining(subCategory.getId());
            Topic parentTopic = topicDAO.findByCategoriesContaining(parentCategory.getId());
            Stakeholder parentStakeholder = stakeholderDAO.findByTopicsContaining(parentTopic.getId());

            Section sectionNew = new Section();
            sectionNew.copyFromDefault(section);

            sectionNew.setStakeholderAlias(parentStakeholder.getAlias());

            sectionDAO.save(sectionNew);

            List<String> sections = null;
            if (section.getType().equals("chart")) {
                sections = subCategory.getCharts();
            } else if (section.getType().equals("number")) {
                sections = subCategory.getNumbers();
            }
            sections.add(sectionNew.getId());

            subCategoryDAO.save(subCategory);
        }
    }

    public void onUpdateDefaultSection(Section section, Stakeholder stakeholder, Section oldSection) {
        log.debug("On update default section");

        // section already exists - check if changed and update all sections based on it

        boolean changed = false;
        List<Section> sections = sectionDAO.findByDefaultId(section.getId());

        for(Section sectionBasedOnDefault : sections) {
            if(section.getTitle() != null && !section.getTitle().equals(sectionBasedOnDefault.getTitle())
                    && (oldSection.getTitle() == null || oldSection.getTitle().equals(sectionBasedOnDefault.getTitle()))) {

                sectionBasedOnDefault.setTitle(section.getTitle());
                changed = true;
            }

            if(!changed) {
//                break;
                continue;
            }

//            sectionBasedOnDefault.setTitle(section.getTitle());
            sectionBasedOnDefault.setUpdateDate(section.getUpdateDate());
            sectionDAO.save(sectionBasedOnDefault);
        }
    }*/

    @PreAuthorize("isAuthenticated()")
    @RequestMapping(value = "/{stakeholderId}/{topicId}/{categoryId}/{subcategoryId}/{sectionId}/delete", method = RequestMethod.DELETE)
    public boolean deleteSection(@PathVariable("stakeholderId") String stakeholderId,
                                 @PathVariable("topicId") String topicId,
                                 @PathVariable("categoryId") String categoryId,
                                 @PathVariable("subcategoryId") String subcategoryId,
                                 @PathVariable("sectionId") String sectionId,
                                 @RequestParam(required = false) String children) {
        log.debug("delete section");
        log.debug("Id: " + sectionId + " - Stakeholder: " + stakeholderId + " - Topic: " + topicId + " - Category: " + categoryId + " - SubCategory: " + subcategoryId);
        Stakeholder stakeholder = this.stakeholderService.findById(stakeholderId);
        Topic topic = this.topicService.findByPath(stakeholder, topicId);
        Category category = this.categoryService.findByPath(topic, categoryId);
        SubCategory subCategory = this.subCategoryService.findByPath(category, subcategoryId);
        Section section = this.sectionService.findByPath(subCategory, sectionId);
        this.sectionService.delete(stakeholder.getType(), section, true);
        return true;
    }

    /*@PreAuthorize("isAuthenticated()")
    @RequestMapping(value = "/{stakeholderId}/{topicId}/{categoryId}/{subcategoryId}/{type}/reorder", method = RequestMethod.POST)
    public List<Section> reorderSections(@PathVariable("stakeholderId") String stakeholderId,
                                         @PathVariable("topicId") String topicId,
                                         @PathVariable("categoryId") String categoryId,
                                         @PathVariable("subcategoryId") String subcategoryId,
                                         @PathVariable("type") String type,
                                         @RequestBody List<String> sections) {
        log.debug("reorder sections of type: "+type);
        log.debug("Stakeholder: "+stakeholderId + " - Topic: "+topicId + " - Category: "+categoryId+ " - SubCategory: "+subcategoryId);

        SubCategory<String> subCategory = checkForExceptions(stakeholderId, topicId, categoryId, subcategoryId);

        if (type.equals("chart")) {
            List<String> oldSections = subCategory.getCharts();
            for (String sectionId : oldSections) {
                if (!sections.contains(sectionId)) {
                    sections.add(sectionId);
                }
            }
            subCategory.setCharts(sections);
        } else if (type.equals("number")) {
            List<String> oldSections = subCategory.getNumbers();
            for (String sectionId : oldSections) {
                if (!sections.contains(sectionId)) {
                    sections.add(sectionId);
                }
            }
            subCategory.setNumbers(sections);
        }

        List<Section> sectionsFull = new ArrayList<>();
        for(String sectionId : sections) {
            Section section = sectionDAO.findById(sectionId);
            if(section == null) {
                // EXCEPTION - Section not found
                throw new EntityNotFoundException("Reorder sections: Section with id: " + sectionId + " not found");
            }
            sectionsFull.add(section);
        }

        subCategoryDAO.save(subCategory);
        log.debug("Sections reordered!");

        return sectionsFull;
    }*/
}