/*
File:   cwasm_debug.c
Author: Taylor Robbins
Date:   08\29\2025
Description: 
	** Holds functions and macros for the debug output API we use in the application
*/

typedef enum DbgLevel DbgLevel;
enum DbgLevel
{
	DbgLevel_Debug = 0,
	DbgLevel_Info,
	DbgLevel_Warning,
	DbgLevel_Error,
	DbgLevel_Count,
};

static DbgLevel DebugOutputLineBufferLevel = DbgLevel_Debug;
static u32 DebugOutputLineBufferLength = 0;
static char DebugOutputLineBuffer[CWASM_DEBUG_OUTPUT_LINE_BUFFER_SIZE];
static char DebugOutputPrintBuffer[CWASM_DEBUG_OUTPUT_PRINT_BUFFER_SIZE];

#if CWASM_DEBUG
void CwasmDebugOutput(const char* filePath, u32 lineNumber, const char* functionName, DbgLevel level, bool newLine, const char* messageNt)
#else
void CwasmDebugOutput(DbgLevel level, bool newLine, const char* messageNt)
#endif
{
	if (level == DbgLevel_Debug   && !CWASM_ENABLE_DBG_LEVEL_DEBUG)   { return; }
	if (level == DbgLevel_Info    && !CWASM_ENABLE_DBG_LEVEL_INFO)    { return; }
	if (level == DbgLevel_Warning && !CWASM_ENABLE_DBG_LEVEL_WARNING) { return; }
	if (level == DbgLevel_Error   && !CWASM_ENABLE_DBG_LEVEL_ERROR)   { return; }
	
	u32 lineStart = 0;
	int messageLength = (messageNt != nullptr) ? strlen(messageNt) : 0;
	for (int cIndex = 0; cIndex < messageLength + (newLine ? 1 : 0); cIndex++)
	{
		char character = (cIndex < messageLength) ? messageNt[cIndex] : '\n';
		if (character == '\n')
		{
			if (DebugOutputLineBufferLength > 0)
			{
				DebugOutputLineBufferLevel = (level > DebugOutputLineBufferLevel) ? level : DebugOutputLineBufferLevel;
				u32 numCharsToCopy = ((cIndex - lineStart) < (CWASM_DEBUG_OUTPUT_LINE_BUFFER_SIZE - DebugOutputLineBufferLength))
					? (cIndex - lineStart)
					: (CWASM_DEBUG_OUTPUT_LINE_BUFFER_SIZE - DebugOutputLineBufferLength);
				if (numCharsToCopy > 0)
				{
					memcpy(&DebugOutputLineBuffer[DebugOutputLineBufferLength], &messageNt[lineStart], numCharsToCopy);
					DebugOutputLineBufferLength += numCharsToCopy;
				}
				jsStdPrint((int)DebugOutputLineBufferLevel, &DebugOutputLineBuffer[0], DebugOutputLineBufferLength);
				DebugOutputLineBufferLength = 0;
				DebugOutputLineBufferLevel = DbgLevel_Debug;
			}
			else
			{
				jsStdPrint((int)level, &messageNt[lineStart], messageLength - lineStart);
			}
			lineStart = cIndex+1;
		}
	}
	
	if (lineStart < messageLength)
	{
		u32 numCharsToCopy = ((messageLength - lineStart) < (CWASM_DEBUG_OUTPUT_LINE_BUFFER_SIZE - DebugOutputLineBufferLength))
			? (messageLength - lineStart)
			: (CWASM_DEBUG_OUTPUT_LINE_BUFFER_SIZE - DebugOutputLineBufferLength);
		if (numCharsToCopy > 0)
		{
			DebugOutputLineBufferLevel = (level > DebugOutputLineBufferLevel) ? level : DebugOutputLineBufferLevel;
			memcpy(&DebugOutputLineBuffer[DebugOutputLineBufferLength], &messageNt[lineStart], numCharsToCopy);
			DebugOutputLineBufferLength += numCharsToCopy;
		}
	}
}

#if CWASM_DEBUG
void CwasmDebugOutputPrint(const char* filePath, u32 lineNumber, const char* functionName, DbgLevel level, bool newLine, const char* formatStrNt, ...)
#else
void CwasmDebugOutputPrint(DbgLevel level, bool newLine, const char* formatStrNt, ...)
#endif
{
	va_list args;
	va_start(args, formatStrNt);
	int printResult = vsnprintf(&DebugOutputPrintBuffer[0], CWASM_DEBUG_OUTPUT_PRINT_BUFFER_SIZE, formatStrNt, args);
	va_end(args);
	if (printResult >= 0)
	{
		DebugOutputPrintBuffer[CWASM_DEBUG_OUTPUT_PRINT_BUFFER_SIZE-1] = '\0';
		#if CWASM_DEBUG
		CwasmDebugOutput(filePath, lineNumber, functionName, level, newLine, &DebugOutputPrintBuffer[0]);
		#else
		CwasmDebugOutput(level, newLine, &DebugOutputPrintBuffer[0]);
		#endif
	}
	else
	{
		#if CWASM_DEBUG
		CwasmDebugOutput(filePath, lineNumber, functionName, level, false, "CWASM_PRINT_ERROR(");
		CwasmDebugOutput(filePath, lineNumber, functionName, level, false, formatStrNt);
		CwasmDebugOutput(filePath, lineNumber, functionName, level, true, ")");
		#else
		CwasmDebugOutput(level, false, "CWASM_PRINT_ERROR(");
		CwasmDebugOutput(level, false, formatStrNt);
		CwasmDebugOutput(level, true, ")");
		#endif
	}
}

#if CWASM_ENABLE_DBG_LEVEL_DEBUG
#if CWASM_DEBUG
#define Write_D(messageNt)                 CwasmDebugOutput(__FILE__, __LINE__, __func__, DbgLevel_Debug, false, (messageNt))
#define Print_D(formatStrNt, ...)     CwasmDebugOutputPrint(__FILE__, __LINE__, __func__, DbgLevel_Debug, false, (formatStrNt), ##__VA_ARGS__)
#define WriteLine_D(messageNt)             CwasmDebugOutput(__FILE__, __LINE__, __func__, DbgLevel_Debug, true,  (messageNt))
#define PrintLine_D(formatStrNt, ...) CwasmDebugOutputPrint(__FILE__, __LINE__, __func__, DbgLevel_Debug, true,  (formatStrNt), ##__VA_ARGS__)
#else
#define Write_D(messageNt)                 CwasmDebugOutput(DbgLevel_Debug, false, (messageNt))
#define Print_D(formatStrNt, ...)     CwasmDebugOutputPrint(DbgLevel_Debug, false, (formatStrNt), ##__VA_ARGS__)
#define WriteLine_D(messageNt)             CwasmDebugOutput(DbgLevel_Debug, true,  (messageNt))
#define PrintLine_D(formatStrNt, ...) CwasmDebugOutputPrint(DbgLevel_Debug, true,  (formatStrNt), ##__VA_ARGS__)
#endif
#else
#define Write_D(messageNt)            //nothing
#define Print_D(formatStrNt, ...)     //nothing
#define WriteLine_D(messageNt)        //nothing
#define PrintLine_D(formatStrNt, ...) //nothing
#endif

#if CWASM_ENABLE_DBG_LEVEL_INFO
#if CWASM_DEBUG
#define Write_I(messageNt)                 CwasmDebugOutput(__FILE__, __LINE__, __func__, DbgLevel_Info, false, (messageNt))
#define Print_I(formatStrNt, ...)     CwasmDebugOutputPrint(__FILE__, __LINE__, __func__, DbgLevel_Info, false, (formatStrNt), ##__VA_ARGS__)
#define WriteLine_I(messageNt)             CwasmDebugOutput(__FILE__, __LINE__, __func__, DbgLevel_Info, true, (messageNt))
#define PrintLine_I(formatStrNt, ...) CwasmDebugOutputPrint(__FILE__, __LINE__, __func__, DbgLevel_Info, true, (formatStrNt), ##__VA_ARGS__)
#else
#define Write_I(messageNt)                 CwasmDebugOutput(DbgLevel_Info, false, (messageNt))
#define Print_I(formatStrNt, ...)     CwasmDebugOutputPrint(DbgLevel_Info, false, (formatStrNt), ##__VA_ARGS__)
#define WriteLine_I(messageNt)             CwasmDebugOutput(DbgLevel_Info, true,  (messageNt))
#define PrintLine_I(formatStrNt, ...) CwasmDebugOutputPrint(DbgLevel_Info, true,  (formatStrNt), ##__VA_ARGS__)
#endif
#else
#define Write_I(messageNt)            //nothing
#define Print_I(formatStrNt, ...)     //nothing
#define WriteLine_I(messageNt)        //nothing
#define PrintLine_I(formatStrNt, ...) //nothing
#endif

#if CWASM_ENABLE_DBG_LEVEL_WARNING
#if CWASM_DEBUG
#define Write_W(messageNt)                 CwasmDebugOutput(__FILE__, __LINE__, __func__, DbgLevel_Warning, false, (messageNt))
#define Print_W(formatStrNt, ...)     CwasmDebugOutputPrint(__FILE__, __LINE__, __func__, DbgLevel_Warning, false, (formatStrNt), ##__VA_ARGS__)
#define WriteLine_W(messageNt)             CwasmDebugOutput(__FILE__, __LINE__, __func__, DbgLevel_Warning, true,  (messageNt))
#define PrintLine_W(formatStrNt, ...) CwasmDebugOutputPrint(__FILE__, __LINE__, __func__, DbgLevel_Warning, true,  (formatStrNt), ##__VA_ARGS__)
#else
#define Write_W(messageNt)                 CwasmDebugOutput(DbgLevel_Warning, false, (messageNt))
#define Print_W(formatStrNt, ...)     CwasmDebugOutputPrint(DbgLevel_Warning, false, (formatStrNt), ##__VA_ARGS__)
#define WriteLine_W(messageNt)             CwasmDebugOutput(DbgLevel_Warning, true,  (messageNt))
#define PrintLine_W(formatStrNt, ...) CwasmDebugOutputPrint(DbgLevel_Warning, true,  (formatStrNt), ##__VA_ARGS__)
#endif
#else
#define Write_W(messageNt)            //nothing
#define Print_W(formatStrNt, ...)     //nothing
#define WriteLine_W(messageNt)        //nothing
#define PrintLine_W(formatStrNt, ...) //nothing
#endif

#if CWASM_ENABLE_DBG_LEVEL_ERROR
#if CWASM_DEBUG
#define Write_E(messageNt)                 CwasmDebugOutput(__FILE__, __LINE__, __func__, DbgLevel_Error, false, (messageNt))
#define Print_E(formatStrNt, ...)     CwasmDebugOutputPrint(__FILE__, __LINE__, __func__, DbgLevel_Error, false, (formatStrNt), ##__VA_ARGS__)
#define WriteLine_E(messageNt)             CwasmDebugOutput(__FILE__, __LINE__, __func__, DbgLevel_Error, true,  (messageNt))
#define PrintLine_E(formatStrNt, ...) CwasmDebugOutputPrint(__FILE__, __LINE__, __func__, DbgLevel_Error, true,  (formatStrNt), ##__VA_ARGS__)
#else
#define Write_E(messageNt)                 CwasmDebugOutput(DbgLevel_Error, false, (messageNt))
#define Print_E(formatStrNt, ...)     CwasmDebugOutputPrint(DbgLevel_Error, false, (formatStrNt), ##__VA_ARGS__)
#define WriteLine_E(messageNt)             CwasmDebugOutput(DbgLevel_Error, true,  (messageNt))
#define PrintLine_E(formatStrNt, ...) CwasmDebugOutputPrint(DbgLevel_Error, true,  (formatStrNt), ##__VA_ARGS__)
#endif
#else
#define Write_E(messageNt)            //nothing
#define Print_E(formatStrNt, ...)     //nothing
#define WriteLine_E(messageNt)        //nothing
#define PrintLine_E(formatStrNt, ...) //nothing
#endif