/*
 * ZeroTier SDK - Network Virtualization Everywhere
 * Copyright (C) 2011-2017  ZeroTier, Inc.  https://www.zerotier.com/
 *
 * 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 <http://www.gnu.org/licenses/>.
 *
 * --
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial closed-source software that incorporates or links
 * directly against ZeroTier software without disclosing the source code
 * of your own application.
 */

#include <pthread.h>
#include <sys/syscall.h>
#include <sys/types.h>

#define ZT_DEBUG_LEVEL     6 // Set this to adjust what you'd like to see in the debug traces

#define ZT_MSG_TEST        1 // For use in selftest
#define ZT_MSG_ERROR       2 // Errors
#define ZT_MSG_INFO        3 // Information which is generally useful to any developer
#define ZT_MSG_EXTRA       4 // If nothing in your world makes sense
#define ZT_MSG_TRANSFER    5 // RX/TX specific statements
#define ZT_MSG_FLOW        6 // High-level flow messages

#define ZT_COLOR           true

// Debug output colors
#if defined(__APPLE__)
		#include "TargetConditionals.h"
#endif
#if defined(ZT_COLOR) && !defined(__ANDROID__) && !defined(TARGET_OS_IPHONE) && !defined(TARGET_IPHONE_SIMULATOR) && !defined(__APP_FRAMEWORK__)
	#define ZT_RED   "\x1B[31m"
	#define ZT_GRN   "\x1B[32m"
	#define ZT_YEL   "\x1B[33m"
	#define ZT_BLU   "\x1B[34m"
	#define ZT_MAG   "\x1B[35m"
	#define ZT_CYN   "\x1B[36m"
	#define ZT_WHT   "\x1B[37m"
	#define ZT_RESET "\x1B[0m"
#else
	#define ZT_RED
	#define ZT_GRN
	#define ZT_YEL
	#define ZT_BLU
	#define ZT_MAG
	#define ZT_CYN
	#define ZT_WHT
	#define ZT_RESET
#endif

#define ZT_FILENAME (strrchr(__FILE__, '/') ? strrchr(__FILE__, '/') + 1 : __FILE__) // short

#if defined(__JNI_LIB__)
		#include <jni.h>
#endif
#if defined(__ANDROID__)
		#include <android/log.h>
		#define ZT_LOG_TAG "ZTSDK"
#endif

#define DEBUG_LWIP(fmt, args...) fprintf(stderr, ZT_CYN "LWIP : %17s:%5d:%25s: " fmt   \
	ZT_RESET, ZT_FILENAME, __LINE__, __FUNCTION__, ##args)

#if ZT_DEBUG_LEVEL >= ZT_MSG_TEST
	#define DEBUG_TEST(fmt, args...) fprintf(stderr, ZT_CYN "TEST : %17s:%5d:%25s: " fmt   \
		"\n" ZT_RESET, ZT_FILENAME, __LINE__, __FUNCTION__, ##args)
#else
	#define DEBUG_ERROR(fmt, args...)
#endif

#if ZT_DEBUG_LEVEL >= ZT_MSG_ERROR
	#define DEBUG_ERROR(fmt, args...) fprintf(stderr, ZT_RED "ERROR: %17s:%5d:%25s: " fmt   \
		"\n" ZT_RESET, ZT_FILENAME, __LINE__, __FUNCTION__, ##args)
#else
	#define DEBUG_ERROR(fmt, args...)
#endif
 
#if ZT_DEBUG_LEVEL >= ZT_MSG_INFO
	#if defined(__ANDROID__)
		#define DEBUG_INFO(fmt, args...) ((void)__android_log_print(ANDROID_LOG_VERBOSE, ZT_LOG_TAG,   \
			"INFO : %17s:%5d:%20s: " fmt "\n", ZT_FILENAME, __LINE__, __FUNCTION__, ##args))
		#define DEBUG_BLANK(fmt, args...) ((void)__android_log_print(ANDROID_LOG_VERBOSE, ZT_LOG_TAG,  \
			"INFO : %17s:%5d:" fmt "\n", ZT_FILENAME, __LINE__, __FUNCTION__, ##args))
		#define DEBUG_ATTN(fmt, args...) ((void)__android_log_print(ANDROID_LOG_VERBOSE, ZT_LOG_TAG,   \
			"INFO : %17s:%5d:%25s: " fmt "\n", ZT_FILENAME, __LINE__, __FUNCTION__, ##args))
		#define DEBUG_STACK(fmt, args...) ((void)__android_log_print(ANDROID_LOG_VERBOSE, ZT_LOG_TAG,  \
			"STACK: %17s:%5d:%25s: " fmt "\n", ZT_FILENAME, __LINE__, __FUNCTION__, ##args))
	#else
		#define DEBUG_INFO(fmt, args...) fprintf(stderr,                                               \
			"INFO : %17s:%5d:%25s: " fmt "\n", ZT_FILENAME, __LINE__, __FUNCTION__, ##args)
		#define DEBUG_ATTN(fmt, args...) fprintf(stderr, ZT_CYN                                        \
			"ATTN : %17s:%5d:%25s: " fmt "\n" ZT_RESET, ZT_FILENAME, __LINE__, __FUNCTION__, ##args)
		#define DEBUG_STACK(fmt, args...) fprintf(stderr, ZT_YEL                                       \
			"STACK: %17s:%5d:%25s: " fmt "\n" ZT_RESET, ZT_FILENAME, __LINE__, __FUNCTION__, ##args)
		#define DEBUG_BLANK(fmt, args...) fprintf(stderr,                                              \
			"INFO : %17s:%5d:" fmt "\n", ZT_FILENAME, __LINE__, ##args)
#endif
#else
	#define DEBUG_INFO(fmt, args...)
	#define DEBUG_BLANK(fmt, args...)
	#define DEBUG_ATTN(fmt, args...)
	#define DEBUG_STACK(fmt, args...)
#endif

#if ZT_DEBUG_LEVEL >= ZT_MSG_TRANSFER
	#if defined(__ANDROID__)
		#define DEBUG_TRANS(fmt, args...) ((void)__android_log_print(ANDROID_LOG_VERBOSE, ZT_LOG_TAG,  \
			"TRANS: %17s:%5d:%25s: " fmt "\n", ZT_FILENAME, __LINE__, __FUNCTION__, ##args))
	#else
		#define DEBUG_TRANS(fmt, args...) fprintf(stderr, ZT_GRN "TRANS: %17s:%5d:%25s: " fmt \
			"\n" ZT_RESET, ZT_FILENAME, __LINE__, __FUNCTION__, ##args)
	#endif
#else
	#define DEBUG_TRANS(fmt, args...)
#endif

#if ZT_DEBUG_LEVEL >= ZT_MSG_EXTRA
	#if defined(__ANDROID__)
		#define DEBUG_EXTRA(fmt, args...) ((void)__android_log_print(ANDROID_LOG_VERBOSE, ZT_LOG_TAG, \
			"EXTRA: %17s:%5d:%25s: " fmt "\n", ZT_FILENAME, __LINE__, __FUNCTION__, ##args))
	#else
		#define DEBUG_EXTRA(fmt, args...) fprintf(stderr, \
			"EXTRA: %17s:%5d:%25s: " fmt "\n", ZT_FILENAME, __LINE__, __FUNCTION__, ##args)
	#endif
#else
	#define DEBUG_EXTRA(fmt, args...)
#endif

#if ZT_DEBUG_LEVEL >= ZT_MSG_FLOW
	#if defined(__ANDROID__)
		#define DEBUG_FLOW(fmt, args...) ((void)__android_log_print(ANDROID_LOG_VERBOSE, ZT_LOG_TAG, \ 
			"FLOW : %17s:%5d:%25s: " fmt "\n", ZT_FILENAME, __LINE__, __FUNCTION__, ##args))
	#else
		#define DEBUG_FLOW(fmt, args...) fprintf(stderr, "FLOW : %17s:%5d:%25s: " fmt "\n", \
			ZT_FILENAME, __LINE__, __FUNCTION__, ##args)
	#endif
	#else
		#define DEBUG_FLOW(fmt, args...)
#endif