// --------------------------------------------------------------------------------------------------------------------
/// \file  logger.cpp
/// \brief Description
// --------------------------------------------------------------------------------------------------------------------
// 
// vbchaos software design
//
// --------------------------------------------------------------------------------------------------------------------
/// $Revision: $
/// $Author: $
/// $Date: $
//  (c) 2023 vbchaos
// --------------------------------------------------------------------------------------------------------------------


// --------------------------------------------------------------------------------------------------------------------
// Include files
// --------------------------------------------------------------------------------------------------------------------

#include <logger.h>

#include <algorithm>
#include <cstdio>
#include <cstdarg>

// --------------------------------------------------------------------------------------------------------------------
// Constant and macro definitions
// --------------------------------------------------------------------------------------------------------------------


// --------------------------------------------------------------------------------------------------------------------
// Type definitions
// --------------------------------------------------------------------------------------------------------------------


// --------------------------------------------------------------------------------------------------------------------
// File-scope variables
// --------------------------------------------------------------------------------------------------------------------



// --------------------------------------------------------------------------------------------------------------------
// Function declarations
// --------------------------------------------------------------------------------------------------------------------



// --------------------------------------------------------------------------------------------------------------------
// Function definitions
// --------------------------------------------------------------------------------------------------------------------

std::list<struct logger::LogQueueItem> logger::queue;
uint32_t logger::queuesize = 16;
uint32_t logger::numberOfLostMessages = 0;
bool logger::overflowRecovery = false;

logger::logger(uint32_t queuesize, ISerialBus<uint8_t>& serialPort) : port {serialPort}
{
   numberOfLostMessages = 0;
   // Compose the debug type level list
   composeTypeParameterList();
}


FunctionStatus logger::log(const char* fileName, const char* functionName, int lineNumber, LogType logType, const char* format, ...)
{
   FunctionStatus returnValue = FUNCTION_STATUS_OK;

#if defined(ENABLE_SERIAL_LOGGING)
   int nrOfMessages;
   struct LogQueueItem logQueueItem;
   va_list ap;

   nrOfMessages = queue.size();

   if((nrOfMessages >= queuesize - 1) && !overflowRecovery)
   {
      // Queue almost full, only one entry left. Log a warning instead
      composeLogQueueItem(&logQueueItem, __FILE__, __func__, __LINE__, LOGTYPE_WARNING, "Log queue overflow");
      queue.push_back(logQueueItem);

      overflowRecovery = true;
      numberOfLostMessages = 1;
   }
   else if((nrOfMessages == 0) && overflowRecovery)
   {
      // Queue empty again after an overflow
      std::string str = std::to_string(numberOfLostMessages) + " messages were lost in the logger due to QUEUE overflow";
      composeLogQueueItem(&logQueueItem, __FILE__, __func__, __LINE__, LOGTYPE_WARNING, str);
      queue.push_back(logQueueItem);

      overflowRecovery = false;
   }
   else if(!overflowRecovery)
   {
      // Normal behaviour, queue not full
      char str[128];
      va_start(ap, format);
      vsnprintf(str, sizeof(str) / sizeof(str[0]), format, ap);
      va_end(ap);

      composeLogQueueItem(&logQueueItem, fileName, functionName, lineNumber, logType, str);
      queue.push_back(logQueueItem);
   }
   else
   {
      // Count number of lost messages
      ++numberOfLostMessages;
   }
#endif
   return returnValue;
}


void logger::composeTypeParameterList(void)
{
   typeParameterList.clear();
   // Add Debug information
   typeParameterList.push_back({LOGTYPE_DEBUG, "\033[33m", "DBG", "\033[0m"});
   // Add Warning information
   typeParameterList.push_back({LOGTYPE_WARNING, "\033[35m", "WRN", "\033[0m"});
   // Add Error information
   typeParameterList.push_back({LOGTYPE_ERROR, "\033[31m", "ERR", "\033[0m"});
   // Add Success information
   typeParameterList.push_back({LOGTYPE_SUCCESS, "\033[32m", "SCS", "\033[0m"});
   // Add Information information
   typeParameterList.push_back({LOGTYPE_INFO, "\033[33m", "INF", "\033[0m"});
   // Add Print information
   typeParameterList.push_back({LOGTYPE_PRINT, "", "DBG", "\033[0m"});

}


#if defined(ENABLE_SERIAL_LOGGING)
void logger::composeLogQueueItem(struct LogQueueItem* logQueueItem, const std::string& fileName, const std::string& functionName,
   int lineNumber, LogType logType, const std::string& context)
{

   logQueueItem->logType = logType;
   logQueueItem->context = context;

   logQueueItem->fileName = fileName;
   logQueueItem->functionName = functionName;
   logQueueItem->lineNumber = lineNumber;
}
#endif

void logger::task()
{
   struct LogQueueItem logQueueItem;

   // Check if there is anything in the queue
   // If queue is empty, return to scheduler
   if (queue.empty())
   {
      return;
   }
   // Get the first log item from queue
   logQueueItem = queue.front();
   // Remove the item from the queue
   queue.pop_front();


   if(logQueueItem.logType == LOGTYPE_PRINT)
   {
      // Raw print
#if defined(ENABLE_SERIAL_LOGGING)
      port.write(NO_DEVICE_ADDRESS, NO_REGISTER_ADDRESS, (uint8_t*)logQueueItem.context.c_str(), logQueueItem.context.length());
#endif

   }
   else
   {
      unsigned int seconds = 0;

#if defined(ENABLE_SERIAL_LOGGING)
      // Formatted print

      // Find the correct Log level type
      auto it = std::find_if(typeParameterList.begin(), typeParameterList.end(), [&logQueueItem](const struct typeParameters& obj) {return obj.logType == logQueueItem.logType;});

      std::string outputString = "\n\r"
                               + it->vt100Prefix + " "
                               + it->vt100Prefix + " "
                               + std::to_string(seconds) + " "
                               + logQueueItem.fileName + " "
                               + logQueueItem.functionName + " "
                               + "(line " + std::to_string(logQueueItem.lineNumber) + "): "
                               + logQueueItem.context + " "
                               + it->vt100Postfix;

      port.write(NO_DEVICE_ADDRESS, NO_REGISTER_ADDRESS, (uint8_t*)outputString.c_str(), outputString.length() + 1);
#endif

   }
}