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package org.netbeans.modules.docker.api;

import java.io.Closeable;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
import org.netbeans.api.annotations.common.CheckForNull;
import org.netbeans.modules.docker.Endpoint;
import org.netbeans.modules.docker.StreamItem;

/**
 *
 * @author Petr Hejl
 */
public final class ActionChunkedResult implements Closeable {

    private final Endpoint s;

    private final StreamItem.Fetcher fetcher;

    private final Charset charset;

    ActionChunkedResult(Endpoint s, StreamItem.Fetcher fetcher, Charset charset) {
        this.s = s;
        this.fetcher = fetcher;
        this.charset = charset;
    }

    @CheckForNull
    public Chunk fetchChunk() {
        StreamItem r = fetcher.fetch();
        if (r == null) {
            return null;
        }
        ByteBuffer buffer = r.getData();
        return new Chunk(new String(buffer.array(), buffer.position(), buffer.limit(), charset), r.isError());
    }

    @Override
    public void close() throws IOException {
        s.close();
    }

    public static class Chunk {

        private final String data;

        private final boolean error;

        private Chunk(String data, boolean error) {
            this.data = data;
            this.error = error;
        }

        public String getData() {
            return data;
        }

        public boolean isError() {
            return error;
        }
    }
}
