/*************************************************************************/
/*  debug_adapter_server.cpp                                             */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
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/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
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/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
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/*************************************************************************/

#include "debug_adapter_server.h"

#include "core/os/os.h"
#include "editor/editor_log.h"
#include "editor/editor_node.h"

DebugAdapterServer::DebugAdapterServer() {
	_EDITOR_DEF("network/debug_adapter/remote_port", remote_port);
	_EDITOR_DEF("network/debug_adapter/use_thread", use_thread);
}

void DebugAdapterServer::_notification(int p_what) {
	switch (p_what) {
		case NOTIFICATION_ENTER_TREE:
			start();
			break;
		case NOTIFICATION_EXIT_TREE:
			stop();
			break;
		case NOTIFICATION_INTERNAL_PROCESS: {
			// The main loop can be run again during request processing, which modifies internal state of the protocol.
			// Thus, "polling" is needed to prevent it from parsing other requests while the current one isn't finished.
			if (started && !use_thread && !polling) {
				polling = true;
				protocol.poll();
				polling = false;
			}
		} break;
		case EditorSettings::NOTIFICATION_EDITOR_SETTINGS_CHANGED: {
			int remote_port = (int)_EDITOR_GET("network/debug_adapter/remote_port");
			bool use_thread = (bool)_EDITOR_GET("network/debug_adapter/use_thread");
			if (remote_port != this->remote_port || use_thread != this->use_thread) {
				this->stop();
				this->start();
			}
		} break;
	}
}

void DebugAdapterServer::thread_func(void *p_userdata) {
	DebugAdapterServer *self = static_cast<DebugAdapterServer *>(p_userdata);
	while (self->thread_running) {
		// Poll 20 times per second
		self->protocol.poll();
		OS::get_singleton()->delay_usec(50000);
	}
}

void DebugAdapterServer::start() {
	remote_port = (int)_EDITOR_GET("network/debug_adapter/remote_port");
	use_thread = (bool)_EDITOR_GET("network/debug_adapter/use_thread");
	if (protocol.start(remote_port, IPAddress("127.0.0.1")) == OK) {
		EditorNode::get_log()->add_message("--- Debug adapter server started ---", EditorLog::MSG_TYPE_EDITOR);
		if (use_thread) {
			thread_running = true;
			thread.start(DebugAdapterServer::thread_func, this);
		}
		set_process_internal(!use_thread);
		started = true;
	}
}

void DebugAdapterServer::stop() {
	if (use_thread) {
		ERR_FAIL_COND(!thread.is_started());
		thread_running = false;
		thread.wait_to_finish();
	}
	protocol.stop();
	started = false;
	EditorNode::get_log()->add_message("--- Debug adapter server stopped ---", EditorLog::MSG_TYPE_EDITOR);
}