package com.tenwa.app.invoice.utils;

import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.util.UriComponentsBuilder;

import java.io.*;
import java.net.URI;

public class DownloadPdfUtil {
    public static void go(String url,String localUrl) throws Exception {

        RestTemplate restTemplate = new RestTemplate();

        UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(url);

        URI uri = builder.build(true).toUri();

        String filePath = localUrl ;
        File file = new File(filePath);
        File parentFile = file.getParentFile();
        if(!parentFile.exists()){
            parentFile.mkdirs();
        }
        InputStream inputStream = null;
        OutputStream outputStream = null;


        try {
            HttpHeaders headers = new HttpHeaders();
            ResponseEntity<byte[]> response = restTemplate.exchange(uri, HttpMethod.GET, new HttpEntity<byte[]>(headers), byte[].class);
            byte[] result = response.getBody();
            inputStream = new ByteArrayInputStream(result);

            outputStream = new FileOutputStream(new File(filePath));

            int len = 0;
            byte[] buf = new byte[1024];
            while ((len = inputStream.read(buf, 0, 1024)) != -1) {
                outputStream.write(buf, 0, len);
            }
            outputStream.flush();
        } catch (Exception e) {
            e.printStackTrace();
            throw new Exception(e);
        } finally {
            try {
                if (inputStream != null) inputStream.close();
                if (outputStream != null) outputStream.close();
            } catch (IOException e) {
                e.printStackTrace();
                throw new IOException(e);
            }
        }
    }
}