package com.example.server.utils;

import org.springframework.core.io.ByteArrayResource;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

public class FileUtils {

    public static MultipartFile convertFileToMultipartFile(String filePath) throws IOException {
        Path path = Paths.get(filePath);
        String fileName = path.getFileName().toString();
        byte[] fileContent = Files.readAllBytes(path);
        ByteArrayResource resource = new ByteArrayResource(fileContent);

        return new CustomMultipartFile(resource, fileName);
    }

    private static class CustomMultipartFile implements MultipartFile {

        private final ByteArrayResource resource;
        private final String fileName;

        public CustomMultipartFile(ByteArrayResource resource, String fileName) {
            this.resource = resource;
            this.fileName = fileName;
        }

        @Override
        public String getName() {
            return null;
        }

        @Override
        public String getOriginalFilename() {
            return fileName;
        }

        @Override
        public String getContentType() {
            return null;
        }

        @Override
        public boolean isEmpty() {
            return false;
        }

        @Override
        public long getSize() {
            return resource.contentLength();
        }

        @Override
        public byte[] getBytes() throws IOException {
            return resource.getByteArray();
        }

        @Override
        public InputStream getInputStream() throws IOException {
            return resource.getInputStream();
        }

        @Override
        public void transferTo(File dest) throws IOException, IllegalStateException {
            Files.copy(resource.getInputStream(), dest.toPath());
        }
    }
}