// vim:fileencoding=utf-8:foldmethod=marker

#ifndef UUID_H
#define UUID_H

#include "../common/aliases/aliases.h"
#include "../common/platform/platform.h"
#include "../base/strings/str8/str8.h"

#ifdef WAPP_PLATFORM_CPP
BEGIN_C_LINKAGE
#endif // !WAPP_PLATFORM_CPP

#define UUID_BUF_LENGTH 48
#define WAPP_UUID_SPEC WAPP_STR8_SPEC
#define wapp_uuid_varg(WUUID) wapp_str8_varg((WUUID).uuid)

typedef struct WUUID WUUID;
struct WUUID {
	Str8 uuid;
};

// TODO (Abdelrahman): Update UUID implementation to work properly with C++ and tests for validation

#ifdef WAPP_PLATFORM_CPP
#define wapp_uuid_gen_uuid4() ([&](){           \
	wapp_persist WUUID uuid = wapp_uuid_create(); \
	return *(wapp_uuid_init_uuid4(&uuid));        \
}())
#else
#define wapp_uuid_gen_uuid4() *(wapp_uuid_init_uuid4(&wapp_uuid_create()))
#endif

/* Low level UUID API */

#ifdef WAPP_PLATFORM_CPP
#define wapp_uuid_create() ([&](){ return WUUID{wapp_str8_buf(UUID_BUF_LENGTH)}; }())
#else
#define wapp_uuid_create() ((WUUID){.uuid = wapp_str8_buf(UUID_BUF_LENGTH)})
#endif

// Just returns the same pointer that was passed in with the UUID initialised.
// Fails when passed a NULL pointer.
WUUID *wapp_uuid_init_uuid4(WUUID *uuid);

#ifdef WAPP_PLATFORM_CPP
END_C_LINKAGE
#endif // !WAPP_PLATFORM_CPP

#endif // !UUID_H