// =====================================================================================================================
//  fennec, a free and open source game engine
//  Copyright © 2025  Medusa Slockbower
//
//  This program is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program.  If not, see <https://www.gnu.org/licenses/>.
// =====================================================================================================================

#include <fennec/platform/linux/wayland/lib/headers/wayland-client-protocols.h>
#include <fennec/platform/linux/wayland/lib/loader.h>

#define FENNEC_LIB(name)            bool FENNEC_HAS_LIB_##name;
#define FENNEC_SYMBOL(ret, fn, ...) using WAYLAND_sym_##fn = ret(*)(__VA_ARGS__); \
                                    WAYLAND_sym_##fn WAYLAND_##fn;
#define FENNEC_GLOBAL(type, name)   type* WAYLAND_##name;
#include <fennec/platform/linux/wayland/lib/sym.h>

namespace fennec
{

namespace libwayland
{

using shared_object = platform::shared_object;

struct shared_lib {
	shared_object* obj;
	const cstring name;
};

static int _load_count = 0;

// Create private variables
#define FENNEC_LIB(lib) static shared_lib _FENNEC_LIB_##lib = { nullptr, FENNEC_LIB_##lib };
#include <fennec/platform/linux/wayland/lib/sym.h>

bool load_symbols(platform* platform) {
	if (_load_count++ != 0) {
		return true;
	}

	shared_lib* current_lib = nullptr;
#define FENNEC_LIB(lib) _FENNEC_LIB_##lib.obj = platform->load_object(_FENNEC_LIB_##lib.name); \
	                    FENNEC_HAS_LIB_##lib = _FENNEC_LIB_##lib.obj != nullptr; \
	                    if(not FENNEC_HAS_LIB_##lib) { \
							unload_symbols(platform); \
							return false; \
						} \
	                    current_lib = &_FENNEC_LIB_##lib;
#define FENNEC_SYMBOL(ret, fn, ...) WAYLAND_##fn = (WAYLAND_sym_##fn)(platform->find_symbol(current_lib->obj, #fn)); \
	                                assertf(WAYLAND_##fn != nullptr, "Failed to find symbol: " #fn);
#define FENNEC_GLOBAL(type, name)   WAYLAND_##name = (type*)(platform->find_symbol(current_lib->obj, #name)); \
	                                assertf(WAYLAND_##name != nullptr, "Failed to find global: " #name);
#include <fennec/platform/linux/wayland/lib/sym.h>



	return true;
}

void unload_symbols(platform* platform) {
	if (--_load_count != 0) {
		return;
	}

#define FENNEC_LIB(lib) platform->unload_object(_FENNEC_LIB_##lib.obj); \
	                    _FENNEC_LIB_##lib.obj    = nullptr;
#define FENNEC_SYMBOL(ret, fn, ...) WAYLAND_##fn = nullptr;
#define FENNEC_GLOBAL(type, name) WAYLAND_##name = nullptr;
#include <fennec/platform/linux/wayland/lib/sym.h>
}


}

}