package com.krylov.refound.mapper;

import com.krylov.refound.dto.PostRequest;
import com.krylov.refound.dto.PostResponse;
import com.krylov.refound.entity.Post;
import com.krylov.refound.enums.PostCategory;
import org.mapstruct.Mapper;
import org.mapstruct.Mapping;
import com.krylov.refound.entity.Image;
import org.mapstruct.Named;
import java.util.List;

@Mapper(componentModel = "spring")
public interface PostMapper {

  @Mapping(source = "category", target = "category", qualifiedByName = "stringToPostCategory")
  @Mapping(source = "rewardText", target = "reward")
  Post toEntity(PostRequest request);

  @Mapping(source = "user.id", target = "userId")
  @Mapping(source = "user.login", target = "userEmail")
  @Mapping(source = "images", target = "images", qualifiedByName = "imagesToUrls")
  @Mapping(target = "category", expression = "java(post.getCategory().getDisplayName())")
  @Mapping(source = "isReward", target = "reward")
  @Mapping(source = "reward", target = "rewardText")
  PostResponse toResponse(Post post);

  @Named("imagesToUrls")
  default List<String> imagesToUrls(List<Image> images) {
    if (images == null) return List.of();
    return images.stream()
        .map(Image::getUrl)
        .toList();
  }

  @Named("stringToPostCategory")
  default PostCategory stringToPostCategory(String displayName) {
    if (displayName == null) return null;
    return PostCategory.fromDisplayName(displayName);
  }
}