package ru.soune.nocopy.service;

import lombok.AllArgsConstructor;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import ru.soune.nocopy.dto.UserContentRequest;
import ru.soune.nocopy.dto.UserContentUpdateRequest;
import ru.soune.nocopy.entity.file.FileType;
import ru.soune.nocopy.entity.User;
import ru.soune.nocopy.entity.UserContent;
import ru.soune.nocopy.exception.ContentNotFoundException;
import ru.soune.nocopy.exception.UserNotFoundException;
import ru.soune.nocopy.mapper.UserContentMapper;
import ru.soune.nocopy.repository.UserContentRepository;
import ru.soune.nocopy.repository.UserRepository;

import java.util.List;
import java.util.Optional;

@Service
@AllArgsConstructor
public class UserContentService {

    private final UserContentRepository userContentRepository;

    private final UserRepository userRepository;

    private final UserContentMapper userContentMapper;

    public List<UserContent> findByUser(long userId) {
        return userContentRepository.findByUserId(userId);
    }

    @Transactional
    public UserContent addUserContent(UserContentRequest userContentRequest) {
        UserContent userContent = new UserContent();

        Optional<User> byEmail = userRepository.findByEmail(userContentRequest.userEmail());
        User user = byEmail.orElseThrow(() -> new UserNotFoundException(userContentRequest.userEmail()));

        userContent.setUser(user);
        userContent.setFilename(userContentRequest.fileName());
        userContent.setFileExtension(userContentRequest.fileExtension());
        userContent.setFilePath(userContentRequest.filePath());
        userContent.setFileType(FileType.valueOf(userContentRequest.fileType()));
        userContent.setOriginalFilename(userContentRequest.originalFilename());
        userContent.setProtectionLevel(userContentRequest.protectionLevel());
        userContent.setFileSize(userContentRequest.fileSize());

        //TODO add
        //    @Column(name = "protection_hash", length = 64)
        //    private String protectionHash;
        //    @Column(name = "watermark_id", length = 50)
        //    private String watermarkId;

        return userContentRepository.save(userContent);
    }

    @Transactional
    public UserContent updateUserContent(UserContentUpdateRequest userContentRequest) {
        UserContent entity = userContentRepository.findById(userContentRequest.id())
                .orElseThrow(() -> new ContentNotFoundException("Content not found with: " + userContentRequest.id()));

        userContentMapper.updateEntityFromDto(userContentRequest, entity);

        return userContentRepository.save(entity);
    }

    public void deleteUserContent(long userContentId) {
        userContentRepository.deleteById(userContentId);
    }
}