using org.ldk.impl;
using org.ldk.enums;
using org.ldk.util;
using System;

namespace org { namespace ldk { namespace structs {



/** An implementation of CustomMessageHandler */
public interface CustomMessageHandlerInterface {
	/**Handles the given message sent from `sender_node_id`, possibly producing messages for
	 * [`CustomMessageHandler::get_and_clear_pending_msg`] to return and thus for [`PeerManager`]
	 * to send.
	 */
	Result_NoneLightningErrorZ handle_custom_message(Type msg, byte[] sender_node_id);
	/**Returns the list of pending messages that were generated by the handler, clearing the list
	 * in the process. Each message is paired with the node id of the intended recipient. If no
	 * connection to the node exists, then the message is simply not sent.
	 */
	TwoTuple_PublicKeyTypeZ[] get_and_clear_pending_msg();
	/**Gets the node feature flags which this handler itself supports. All available handlers are
	 * queried similarly and their feature flags are OR'd together to form the [`NodeFeatures`]
	 * which are broadcasted in our [`NodeAnnouncement`] message.
	 * 
	 * [`NodeAnnouncement`]: crate::ln::msgs::NodeAnnouncement
	 */
	NodeFeatures provided_node_features();
	/**Gets the init feature flags which should be sent to the given peer. All available handlers
	 * are queried similarly and their feature flags are OR'd together to form the [`InitFeatures`]
	 * which are sent in our [`Init`] message.
	 * 
	 * [`Init`]: crate::ln::msgs::Init
	 */
	InitFeatures provided_init_features(byte[] their_node_id);
}

/**
 * A handler provided to [`PeerManager`] for reading and handling custom messages.
 * 
 * [BOLT 1] specifies a custom message type range for use with experimental or application-specific
 * messages. `CustomMessageHandler` allows for user-defined handling of such types. See the
 * [`lightning_custom_message`] crate for tools useful in composing more than one custom handler.
 * 
 * [BOLT 1]: https://github.com/lightning/bolts/blob/master/01-messaging.md
 * [`lightning_custom_message`]: https://docs.rs/lightning_custom_message/latest/lightning_custom_message
 */
public class CustomMessageHandler : CommonBase {
	internal bindings.LDKCustomMessageHandler bindings_instance;
	internal long instance_idx;

	internal CustomMessageHandler(object _dummy, long ptr) : base(ptr) { bindings_instance = null; }
	~CustomMessageHandler() {
		if (ptr != 0) { bindings.CustomMessageHandler_free(ptr); }
	}

	private class LDKCustomMessageHandlerHolder { internal CustomMessageHandler held; }
	private class LDKCustomMessageHandlerImpl : bindings.LDKCustomMessageHandler {
		internal LDKCustomMessageHandlerImpl(CustomMessageHandlerInterface arg, LDKCustomMessageHandlerHolder impl_holder) { this.arg = arg; this.impl_holder = impl_holder; }
		private CustomMessageHandlerInterface arg;
		private LDKCustomMessageHandlerHolder impl_holder;
		public long handle_custom_message(long _msg, long _sender_node_id) {
			Type ret_hu_conv = new Type(null, _msg);
			if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(this); };
			byte[] _sender_node_id_conv = InternalUtils.decodeUint8Array(_sender_node_id);
			Result_NoneLightningErrorZ ret = arg.handle_custom_message(ret_hu_conv, _sender_node_id_conv);
				GC.KeepAlive(arg);
			long result = ret == null ? 0 : ret.clone_ptr();
			return result;
		}
		public long get_and_clear_pending_msg() {
			TwoTuple_PublicKeyTypeZ[] ret = arg.get_and_clear_pending_msg();
				GC.KeepAlive(arg);
			long result = InternalUtils.encodeUint64Array(InternalUtils.mapArray(ret, ret_conv_25 => ret_conv_25 == null ? 0 : ret_conv_25.clone_ptr()));
			return result;
		}
		public long provided_node_features() {
			NodeFeatures ret = arg.provided_node_features();
				GC.KeepAlive(arg);
			long result = ret == null ? 0 : ret.clone_ptr();
			return result;
		}
		public long provided_init_features(long _their_node_id) {
			byte[] _their_node_id_conv = InternalUtils.decodeUint8Array(_their_node_id);
			InitFeatures ret = arg.provided_init_features(_their_node_id_conv);
				GC.KeepAlive(arg);
			long result = ret == null ? 0 : ret.clone_ptr();
			return result;
		}
	}

	/** Creates a new instance of CustomMessageHandler from a given implementation */
	public static CustomMessageHandler new_impl(CustomMessageHandlerInterface arg, CustomMessageReaderInterface customMessageReader_impl) {
		LDKCustomMessageHandlerHolder impl_holder = new LDKCustomMessageHandlerHolder();
		LDKCustomMessageHandlerImpl impl = new LDKCustomMessageHandlerImpl(arg, impl_holder);
		CustomMessageReader customMessageReader = CustomMessageReader.new_impl(customMessageReader_impl);
		long[] ptr_idx = bindings.LDKCustomMessageHandler_new(impl, customMessageReader.instance_idx);

		impl_holder.held = new CustomMessageHandler(null, ptr_idx[0]);
		impl_holder.held.instance_idx = ptr_idx[1];
		impl_holder.held.bindings_instance = impl;
		impl_holder.held.ptrs_to.AddLast(customMessageReader);
		return impl_holder.held;
	}

	/**
	 * Handles the given message sent from `sender_node_id`, possibly producing messages for
	 * [`CustomMessageHandler::get_and_clear_pending_msg`] to return and thus for [`PeerManager`]
	 * to send.
	 */
	public Result_NoneLightningErrorZ handle_custom_message(org.ldk.structs.Type msg, byte[] sender_node_id) {
		long ret = bindings.CustomMessageHandler_handle_custom_message(this.ptr, msg.ptr, InternalUtils.encodeUint8Array(InternalUtils.check_arr_len(sender_node_id, 33)));
		GC.KeepAlive(this);
		GC.KeepAlive(msg);
		GC.KeepAlive(sender_node_id);
		if (ret >= 0 && ret <= 4096) { return null; }
		Result_NoneLightningErrorZ ret_hu_conv = Result_NoneLightningErrorZ.constr_from_ptr(ret);
		if (this != null) { this.ptrs_to.AddLast(msg); };
		return ret_hu_conv;
	}

	/**
	 * Returns the list of pending messages that were generated by the handler, clearing the list
	 * in the process. Each message is paired with the node id of the intended recipient. If no
	 * connection to the node exists, then the message is simply not sent.
	 */
	public TwoTuple_PublicKeyTypeZ[] get_and_clear_pending_msg() {
		long ret = bindings.CustomMessageHandler_get_and_clear_pending_msg(this.ptr);
		GC.KeepAlive(this);
		if (ret >= 0 && ret <= 4096) { return null; }
		int ret_conv_25_len = InternalUtils.getArrayLength(ret);
		TwoTuple_PublicKeyTypeZ[] ret_conv_25_arr = new TwoTuple_PublicKeyTypeZ[ret_conv_25_len];
		for (int z = 0; z < ret_conv_25_len; z++) {
			long ret_conv_25 = InternalUtils.getU64ArrayElem(ret, z);
			TwoTuple_PublicKeyTypeZ ret_conv_25_hu_conv = new TwoTuple_PublicKeyTypeZ(null, ret_conv_25);
			if (ret_conv_25_hu_conv != null) { ret_conv_25_hu_conv.ptrs_to.AddLast(this); };
			ret_conv_25_arr[z] = ret_conv_25_hu_conv;
		}
		bindings.free_buffer(ret);
		return ret_conv_25_arr;
	}

	/**
	 * Gets the node feature flags which this handler itself supports. All available handlers are
	 * queried similarly and their feature flags are OR'd together to form the [`NodeFeatures`]
	 * which are broadcasted in our [`NodeAnnouncement`] message.
	 * 
	 * [`NodeAnnouncement`]: crate::ln::msgs::NodeAnnouncement
	 */
	public NodeFeatures provided_node_features() {
		long ret = bindings.CustomMessageHandler_provided_node_features(this.ptr);
		GC.KeepAlive(this);
		if (ret >= 0 && ret <= 4096) { return null; }
		org.ldk.structs.NodeFeatures ret_hu_conv = null; if (ret < 0 || ret > 4096) { ret_hu_conv = new org.ldk.structs.NodeFeatures(null, ret); }
		if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(this); };
		return ret_hu_conv;
	}

	/**
	 * Gets the init feature flags which should be sent to the given peer. All available handlers
	 * are queried similarly and their feature flags are OR'd together to form the [`InitFeatures`]
	 * which are sent in our [`Init`] message.
	 * 
	 * [`Init`]: crate::ln::msgs::Init
	 */
	public InitFeatures provided_init_features(byte[] their_node_id) {
		long ret = bindings.CustomMessageHandler_provided_init_features(this.ptr, InternalUtils.encodeUint8Array(InternalUtils.check_arr_len(their_node_id, 33)));
		GC.KeepAlive(this);
		GC.KeepAlive(their_node_id);
		if (ret >= 0 && ret <= 4096) { return null; }
		org.ldk.structs.InitFeatures ret_hu_conv = null; if (ret < 0 || ret > 4096) { ret_hu_conv = new org.ldk.structs.InitFeatures(null, ret); }
		if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(this); };
		return ret_hu_conv;
	}

}
} } }