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/*************************************************************************/
/*  signal_awaiter_utils.h                                               */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* 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:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/

#ifndef SIGNAL_AWAITER_UTILS_H
#define SIGNAL_AWAITER_UTILS_H

#include "core/object/ref_counted.h"

#include "csharp_script.h"
#include "mono_gc_handle.h"

Error gd_mono_connect_signal_awaiter(Object *p_source, const StringName &p_signal, Object *p_target, MonoObject *p_awaiter);

class SignalAwaiterCallable : public CallableCustom {
	ObjectID target_id;
	MonoGCHandleData awaiter_handle;
	StringName signal;

public:
	static bool compare_equal(const CallableCustom *p_a, const CallableCustom *p_b);
	static bool compare_less(const CallableCustom *p_a, const CallableCustom *p_b);

	static constexpr CompareEqualFunc compare_equal_func_ptr = &SignalAwaiterCallable::compare_equal;
	static constexpr CompareEqualFunc compare_less_func_ptr = &SignalAwaiterCallable::compare_less;

	uint32_t hash() const override;

	String get_as_text() const override;

	CompareEqualFunc get_compare_equal_func() const override;
	CompareLessFunc get_compare_less_func() const override;

	ObjectID get_object() const override;

	_FORCE_INLINE_ StringName get_signal() const { return signal; }

	void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, Callable::CallError &r_call_error) const override;

	SignalAwaiterCallable(Object *p_target, MonoObject *p_awaiter, const StringName &p_signal);
	~SignalAwaiterCallable();
};

class EventSignalCallable : public CallableCustom {
	Object *owner = nullptr;
	const CSharpScript::EventSignal *event_signal;

public:
	static bool compare_equal(const CallableCustom *p_a, const CallableCustom *p_b);
	static bool compare_less(const CallableCustom *p_a, const CallableCustom *p_b);

	static constexpr CompareEqualFunc compare_equal_func_ptr = &EventSignalCallable::compare_equal;
	static constexpr CompareEqualFunc compare_less_func_ptr = &EventSignalCallable::compare_less;

	uint32_t hash() const override;

	String get_as_text() const override;

	CompareEqualFunc get_compare_equal_func() const override;
	CompareLessFunc get_compare_less_func() const override;

	ObjectID get_object() const override;

	StringName get_signal() const;

	void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, Callable::CallError &r_call_error) const override;

	EventSignalCallable(Object *p_owner, const CSharpScript::EventSignal *p_event_signal);
};

#endif // SIGNAL_AWAITER_UTILS_H