import java.io.ByteArrayOutputStream;
import java.io.DataOutput;
import java.io.DataOutputStream;
import java.nio.charset.StandardCharsets;
import java.io.IOException;
import java.io.DataInput;
import java.util.Arrays;
import java.util.Objects;

/**
 * This class contains as static nested classes all other TDLib interface
 * type-classes and function-classes.
 * <p>
 * It has no inner classes, functions or public members.
 */
public final class TdApi {

	private TdApi() {}

	/**
	 * This class is a base class for all TDLib interface classes.
	 */
	public abstract static class Object {

		/**
		 * Returns a string representation of the object.
		 *
		 * @return a string representation of the object.
		 */
		public native String toString();

		/**
		 * Returns an identifier uniquely determining type of the object.
		 *
		 * @return a unique identifier of the object type.
		 */
		public abstract int getConstructor();

		/**
		 * Default Object constructor.
		 */
		private Object() {}

		/**
		 * Serialize the object.
		 *
		 * @return the current object serialized into a byte[].
		 * @throws IOException the serialization failed
		 */
		public byte[] serialize() throws IOException {
			try (ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
				try (DataOutputStream out = new DataOutputStream(baos)) {
					serialize(out);
					return baos.toByteArray();
				}
			}
		}

		/**
		 * Serialize the object.
		 *
		 * @param out the output in which the object is serialized.
		 * @throws IOException the serialization failed
		 */
		public abstract void serialize(DataOutput out) throws IOException;

	}

	/**
	 * This class is a base class for all TDLib interface function-classes.
	 * @param <R> The function return type
	 */
	public abstract static class Function<R extends TdApi.Object> extends TdApi.Object {

		/**
		 * Default Function constructor.
		 */
		private Function() {}

		/**
		 * Returns a string representation of the object.
		 *
		 * @return a string representation of the object.
		 */
		public native String toString();

  }