package com.krylov.refound.service;

import com.krylov.refound.dto.UserResponseDto;
import com.krylov.refound.dto.UserUpdateDto;
import com.krylov.refound.entity.User;
import com.krylov.refound.enums.ErrorCode;
import com.krylov.refound.exception.ApiException;
import com.krylov.refound.repository.UserRepository;
import jakarta.persistence.EntityNotFoundException;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.HttpStatus;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

@Service
@Slf4j
@RequiredArgsConstructor
public class UserService {
  private final UserRepository repository;
  private final AvatarService avatarService;

  public User getCurrentUser() {
    Authentication authentication = SecurityContextHolder.getContext().getAuthentication();

    if (authentication == null || authentication.getPrincipal() == null) {
      throw new ApiException(
          ErrorCode.UNAUTHORIZED,
          "Пользователь не авторизован",
          HttpStatus.UNAUTHORIZED
      );
    }

    String login = (String) authentication.getPrincipal();

    return repository.findByLogin(login)
        .orElseThrow(() -> new ApiException(
            ErrorCode.NOT_FOUND,
            "User not found",
            HttpStatus.NOT_FOUND
        ));
  }

  public UserResponseDto updateUser(Long id, UserUpdateDto dto) {
    User user = repository.findById(id)
        .orElseThrow(() -> new EntityNotFoundException("User not found"));

    user.setLogin(dto.getLogin());
    user.setName(dto.getFirstName());
    user.setLastName(dto.getLastName());
    user.setPhone(dto.getPhone());
    user.setEmail(dto.getEmail());

    MultipartFile avatar = dto.getAvatar();
    if (avatar != null && !avatar.isEmpty()) {
      String url = avatarService.save(avatar); // сохранение на диск/в S3/Yandex Object Storage
      user.setAvatarUrl(url);
    }

    repository.save(user);

    UserResponseDto userResponseDto = getUserResponseDto(user);
    log.info("User updated: {}", userResponseDto);
    return userResponseDto;
  }

  private static UserResponseDto getUserResponseDto(User user) {
    return UserResponseDto.builder()
        .id(user.getId())
        .login(user.getLogin())
        .name(user.getName())
        .phone(user.getPhone())
        .email(user.getEmail())
        .lastName(user.getLastName())
        .avatar(user.getAvatarUrl())
        .build();
  }
}