package org.jboss.resteasy.embedded.test.core.interceptors.resource;

import org.jboss.resteasy.embedded.utils.TestUtil;

import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.MessageBodyWriter;
import javax.ws.rs.ext.Provider;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.ArrayList;

@Provider
public class ReaderContextArrayListEntityProvider implements
      MessageBodyReader<ArrayList<String>>,
      MessageBodyWriter<ArrayList<String>> {

   @Override
   public boolean isWriteable(Class<?> type, Type genericType,
                               Annotation[] annotations, MediaType mediaType) {
      return type == ArrayList.class;
   }

   @Override
   public long getSize(ArrayList<String> t, Class<?> type, Type genericType,
                  Annotation[] annotations, MediaType mediaType) {
      int annlen = annotations.length > 0 ? annotations[0].annotationType()
            .getName().length() : 0;
      return t.iterator().next().length() + annlen
            + mediaType.toString().length();
   }

   @Override
   public void writeTo(ArrayList<String> t, Class<?> type, Type genericType,
                  Annotation[] annotations, MediaType mediaType,
                  MultivaluedMap<String, Object> httpHeaders,
                  OutputStream entityStream) throws IOException,
         WebApplicationException {
      String ann = "";
      if (annotations.length > 0) {
         ann = annotations[0].annotationType().getName();
      }
      entityStream.write((t.iterator().next() + ann + mediaType.toString())
            .getBytes());
   }

   @Override
   public boolean isReadable(Class<?> type, Type genericType,
                              Annotation[] annotations, MediaType mediaType) {
      return type == ArrayList.class;
   }

   @Override
   public ArrayList<String> readFrom(Class<ArrayList<String>> type,
                                      Type genericType, Annotation[] annotations, MediaType mediaType,
                                      MultivaluedMap<String, String> httpHeaders, InputStream entityStream)
         throws IOException, WebApplicationException {
      String text = TestUtil.readString(entityStream);
      entityStream.close();
      String ann = "";
      if (annotations.length > 0) {
         ann = annotations[0].annotationType().getName();
      }
      ArrayList<String> list = new ArrayList<String>();
      list.add(text + ann + mediaType.toString());
      return list;
   }
}
