package kr.re.etri.autoflow.service;

import kr.re.etri.autoflow.payload.response.UserProjectResponse;
import kr.re.etri.autoflow.payload.response.UserInfoResponse;
import kr.re.etri.autoflow.repository.UserProjectMapRepository;
import kr.re.etri.autoflow.repository.UserRepository;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;

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

@Service
@RequiredArgsConstructor
public class UserService {

    private final UserRepository userRepository;
    private final UserProjectMapRepository userProjectMapRepository;

    /**
     * 사용자 ID로 조회
     */
    public Optional<UserInfoResponse> getUserById(Long id) {
        return userRepository.findById(id)
                .map(user -> new UserInfoResponse(
                        user.getId(),
                        user.getUsername(),
                        user.getEmail(),
                        user.getRoles().stream()
                                .map(role -> role.getName().name())
                                .toList()
                ));
    }

    /**
     * 전체 사용자 조회
     */
    public List<UserInfoResponse> getAllUsers() {
        return userRepository.findAll().stream()
                .map(user -> new UserInfoResponse(
                        user.getId(),
                        user.getUsername(),
                        user.getEmail(),
                        user.getRoles().stream()
                                .map(role -> role.getName().name())
                                .toList()
                ))
                .toList();
    }

    public List<UserProjectResponse> getUserProjects(Long userId) {
        return userProjectMapRepository.findAllByUserId(userId).stream()
                .map(mapping -> new UserProjectResponse(
                        mapping.getProject().getId(),
                        mapping.getProject().getPrjNm(),
                        mapping.getPermissions()
                ))
                .collect(Collectors.toList());
    }
}