/**
 * @file debugger.cpp
 * @brief Implementation of debugging functions for monitoring and diagnostics.
 *
 * This file contains the implementation of various debugging functions to monitor
 * and diagnose the system. It includes functions to print system information, WiFi
 * details, EEPROM status, dump configuration settings, dump persistence data, show
 * Diagnostic Trouble Codes (DTCs), and more.
 *
 * @author Marcel Peterkau
 * @date 09.04.2024
 */

#include "debugger.h"

DebugStatus_t DebuggerStatus[dbg_cntElements];

String IpAddress2String(const IPAddress &ipAddress);
void processCmdDebug(String command);
void Debug_formatCFG();
void Debug_formatPersistence();
void Debug_printSystemInfo();
void Debug_printWifiInfo();
void Debug_CheckEEPOM();
void Debug_dumpConfig();
void Debug_dumpPersistance();
void Debug_ShowDTCs();
void Debug_dumpGlobals();
void Debug_printHelp();

/**
 * @brief Initializes the debugger by setting the initial status for different debug ports.
 *        Serial debug output is turned off.
 */
void initDebugger()
{
    // Set the initial status of debug ports
    DebuggerStatus[dbg_Serial] = disabled;
    DebuggerStatus[dbg_Webui] = disabled;

    // Disable serial debug output
    Serial.setDebugOutput(false);
}
/**
 * @brief Processes incoming debug commands from the Serial interface.
 *        It reads characters from Serial and interprets them as commands.
 *        The recognized commands are processed accordingly.
 */
void Debug_Process()
{
    // Enumeration for tracking the state of input processing
    typedef enum InputProcessed_e
    {
        IDLE,         ///< No command processing is in progress
        CMD_COMPLETE, ///< Received a complete command
        CMD_ABORT,    ///< Received an abort command (Esc)
        CMD_OVERFLOW  ///< Input buffer overflow occurred
    } InputProcessed_t;

    static unsigned int inputCnt = 0;       ///< Counter for characters in the input buffer
    static char inputBuffer[32];            ///< Buffer to store the received characters
    InputProcessed_t InputProcessed = IDLE; ///< State variable for input processing

    // Check if there are characters available in the Serial input buffer
    if (Serial.available())
    {
        char inputChar = Serial.read();

        // Process the received character based on its value
        switch (inputChar)
        {
        case '\n':
            inputBuffer[inputCnt] = 0; // terminate the String
            inputCnt = 0;
            InputProcessed = CMD_COMPLETE;
            break;

        case 0x1B: // Esc
            inputBuffer[0] = 0;
            inputCnt = 0;
            InputProcessed = CMD_ABORT;
            break;

        case 0x21 ... 0x7E: // it's a real letter or sign and not some control-chars
            inputBuffer[inputCnt] = inputChar;
            inputCnt++;
            break;

        default:
            break;
        }

        // Check for input buffer overflow
        if (inputCnt > sizeof(inputBuffer))
        {
            inputCnt = 0;
            inputBuffer[sizeof(inputBuffer) - 1] = 0; // terminate the String
            InputProcessed = CMD_OVERFLOW;
        }
    }

    // Process the command based on the detected state of input processing
    switch (InputProcessed)
    {
    case CMD_ABORT:
        Debug_pushMessage("Abort\n");
        break;

    case CMD_COMPLETE:
        processCmdDebug(String(inputBuffer));
        break;

    case CMD_OVERFLOW:
        Debug_pushMessage("Input buffer overflow\n");
        break;

    default:
        break;
    }
    InputProcessed = IDLE;
}
/**
 * @brief Sets the status of a specific debug port (Serial or WebUI).
 *        Updates the status in the DebuggerStatus array and provides debug messages.
 *
 * @param port   The debug port to set the status for (dbg_Serial or dbg_Webui).
 * @param status The status to set (enabled or disabled).
 */
void SetDebugportStatus(DebugPorts_t port, DebugStatus_t status)
{
    // Display a debug message based on the provided status
    if (status == disabled)
        Debug_pushMessage("Disable DebugPort %s\n", sDebugPorts[port]);

    // Update the status in the DebuggerStatus array
    DebuggerStatus[port] = status;

    // Display a debug message based on the updated status
    if (status == enabled)
        Debug_pushMessage("Enabled DebugPort %s\n", sDebugPorts[port]);
}

/**
 * @brief Pushes a formatted debug message to the enabled debug ports (Serial or WebUI).
 *
 * @param format The format string for the debug message.
 * @param ...    Additional arguments for formatting the message.
 */
void Debug_pushMessage(const char *format, ...)
{
    // Check if either the Serial or WebUI debug port is enabled
    if ((DebuggerStatus[dbg_Serial] == enabled) || (DebuggerStatus[dbg_Webui] == enabled))
    {
        char buff[64]; // Buffer to hold the formatted message
        va_list arg;   // Variable argument list for vsnprintf
        va_start(arg, format);

        // Format the message and store it in the buffer
        vsnprintf(buff, sizeof(buff), format, arg);
        va_end(arg);

        // Send the message to the Serial debug port if enabled
        if (DebuggerStatus[dbg_Serial] == enabled)
        {
            Serial.print(buff);
        }

        // Push the message to the WebUI debug port if enabled
        if (DebuggerStatus[dbg_Webui] == enabled)
        {
            Websocket_PushLiveDebug(String(buff));
        }
    }
}

/**
 * @brief Pushes a formatted CAN debug message to the enabled debug ports (Serial or WebUI).
 *
 * @param id   CAN message ID.
 * @param dlc  Data Length Code of the CAN message.
 * @param data Pointer to the data array of the CAN message.
 */
void pushCANDebug(uint32_t id, uint8_t dlc, uint8_t *data)
{
    // Check if either the Serial or WebUI debug port is enabled
    if ((DebuggerStatus[dbg_Serial] == enabled) || (DebuggerStatus[dbg_Webui] == enabled))
    {
        char buff[100]; // Buffer to hold the formatted message
        char *p = buff; // Pointer to navigate the buffer

        // Format the CAN message information into the buffer
        p += snprintf(p, sizeof(buff), "CAN: 0x%08X | %d | ", id, dlc);
        for (int i = 0; i < dlc; i++)
        {
            p += snprintf(p, sizeof(buff) - (p - buff), "%02X ", data[i]);
        }
        *(p++) = '\n';
        *p = '\0';

        // Send the formatted CAN message to the Serial debug port if enabled
        if (DebuggerStatus[dbg_Serial] == enabled)
        {
            Serial.print(buff);
        }

        // Push the formatted CAN message to the WebUI debug port if enabled
        if (DebuggerStatus[dbg_Webui] == enabled)
        {
            Websocket_PushLiveDebug(String(buff));
        }
    }
}

/**
 * @brief Processes a debug command and performs corresponding actions.
 *
 * @param command The debug command to be processed.
 */
void processCmdDebug(String command)
{
    // Check the received command and execute corresponding actions
    if (command == "help")
        Debug_printHelp();
    else if (command == "sysinfo")
        Debug_printSystemInfo();
    else if (command == "netinfo")
        Debug_printWifiInfo();
    else if (command == "formatCFG")
        Debug_formatCFG();
    else if (command == "formatPDS")
        Debug_formatPersistence();
    else if (command == "checkEE")
        Debug_CheckEEPOM();
    else if (command == "dumpEE1k")
        dumpEEPROM(0, 1024);
    else if (command == "dumpEE")
        dumpEEPROM(0, EEPROM_SIZE_BYTES);
    else if (command == "resetPageEE")
        MovePersistencePage_EEPROM(true);
    else if (command == "dumpCFG")
        Debug_dumpConfig();
    else if (command == "dumpPDS")
        Debug_dumpPersistance();
    else if (command == "saveEE")
        globals.requestEEAction = EE_ALL_SAVE;
    else if (command == "dumpGlobals")
        Debug_dumpGlobals();
    else if (command == "sdbg")
        SetDebugportStatus(dbg_Serial, enabled);
    else if (command == "dtc_show")
        Debug_ShowDTCs();
    else if (command == "dtc_clear")
        ClearAllDTC();
    else if (command == "dtc_crit")
        MaintainDTC(DTC_FAKE_DTC_CRIT, true, millis());
    else if (command == "dtc_warn")
        MaintainDTC(DTC_FAKE_DTC_WARN, true, millis());
    else if (command == "dtc_info")
        MaintainDTC(DTC_FAKE_DTC_INFO, true, millis());
    else
        Debug_pushMessage("unknown Command\n");
}

/**
 * @brief Formats the Config-EEPROM and resets it to default values.
 *        Prints a debug message after formatting.
 */
void Debug_formatCFG()
{
    Debug_pushMessage("Formatting Config-EEPROM and resetting to default\n");
    FormatConfig_EEPROM();
}

/**
 * @brief Formats the Persistence-EEPROM and resets it to default values.
 *        Prints a debug message after formatting.
 */
void Debug_formatPersistence()
{
    Debug_pushMessage("Formatting Persistence-EEPROM and resetting to default\n");
    FormatPersistence_EEPROM();
}

/**
 * @brief Prints system information and status to the debug output.
 */
void Debug_printSystemInfo()
{
    Debug_pushMessage("Souko's ChainOiler Mk1\n");
    Debug_pushMessage("Hostname: %s\n", globals.DeviceName);

    FlashMode_t ideMode = ESP.getFlashChipMode();
    Debug_pushMessage("Sdk version: %s\n", ESP.getSdkVersion());
    Debug_pushMessage("Core Version: %s\n", ESP.getCoreVersion().c_str());
    Debug_pushMessage("Boot Version: %u\n", ESP.getBootVersion());
    Debug_pushMessage("Boot Mode: %u\n", ESP.getBootMode());
    Debug_pushMessage("CPU Frequency: %u MHz\n", ESP.getCpuFreqMHz());
    Debug_pushMessage("Reset reason: %s\n", ESP.getResetReason().c_str());
    Debug_pushMessage("Flash Size: %d\n", ESP.getFlashChipRealSize());
    Debug_pushMessage("Flash Size IDE: %d\n", ESP.getFlashChipSize());
    Debug_pushMessage("Flash ide mode:  %s\n", (ideMode == FM_QIO ? "QIO" : ideMode == FM_QOUT ? "QOUT"
                                                                        : ideMode == FM_DIO    ? "DIO"
                                                                        : ideMode == FM_DOUT   ? "DOUT"
                                                                                               : "UNKNOWN"));
    Debug_pushMessage("OTA-Pass: %s\n", QUOTE(ADMIN_PASSWORD));
    Debug_pushMessage("Git-Revision: %s\n", constants.GitHash);
    Debug_pushMessage("Sw-Version: %d.%02d\n", constants.FW_Version_major, constants.FW_Version_minor);
}

/**
 * @brief Dumps the current configuration parameters to the debug output.
 */
void Debug_dumpConfig()
{
    Debug_pushMessage("DistancePerLube_Default: %d\n", LubeConfig.DistancePerLube_Default);
    Debug_pushMessage("DistancePerLube_Rain: %d\n", LubeConfig.DistancePerLube_Rain);
    Debug_pushMessage("tankCapacity_ml: %d\n", LubeConfig.tankCapacity_ml);
    Debug_pushMessage("amountPerDose_microL: %d\n", LubeConfig.amountPerDose_microL);
    Debug_pushMessage("TankRemindAtPercentage: %d\n", LubeConfig.TankRemindAtPercentage);
    Debug_pushMessage("PulsePerRevolution: %d\n", LubeConfig.PulsePerRevolution);
    Debug_pushMessage("TireWidth_mm: %d\n", LubeConfig.TireWidth_mm);
    Debug_pushMessage("TireWidthHeight_Ratio: %d\n", LubeConfig.TireWidthHeight_Ratio);
    Debug_pushMessage("RimDiameter_Inch: %d\n", LubeConfig.RimDiameter_Inch);
    Debug_pushMessage("DistancePerRevolution_mm: %d\n", LubeConfig.DistancePerRevolution_mm);
    Debug_pushMessage("BleedingPulses: %d\n", LubeConfig.BleedingPulses);
    Debug_pushMessage("SpeedSource: %d\n", LubeConfig.SpeedSource);
    Debug_pushMessage("GPSBaudRate: %d\n", LubeConfig.GPSBaudRate);
    Debug_pushMessage("CANSource: %d\n", LubeConfig.CANSource);
    Debug_pushMessage("checksum: 0x%08X\n", LubeConfig.checksum);
}

/**
 * @brief Dumps the global variables and their values to the debug output.
 */
void Debug_dumpGlobals()
{
    Debug_pushMessage("systemStatus: %d\n", globals.systemStatus);
    Debug_pushMessage("resumeStatus: %d\n", globals.resumeStatus);
    Debug_pushMessage("systemStatustxt: %s\n", globals.systemStatustxt);
    Debug_pushMessage("purgePulses: %d\n", globals.purgePulses);
    Debug_pushMessage("requestEEAction: %d\n", globals.requestEEAction);
    Debug_pushMessage("DeviceName: %s\n", globals.DeviceName);
    Debug_pushMessage("FlashVersion: %s\n", globals.FlashVersion);
    Debug_pushMessage("eePersistanceAdress: %d\n", globals.eePersistanceAdress);
    Debug_pushMessage("TankPercentage: %d\n", globals.TankPercentage);
    Debug_pushMessage("hasDTC: %d\n", globals.hasDTC);
}

/**
 * @brief Dumps the persistence data variables and their values to the debug output.
 */
void Debug_dumpPersistance()
{
    Debug_pushMessage("writeCycleCounter: %d\n", PersistenceData.writeCycleCounter);
    Debug_pushMessage("tankRemain_microL: %d\n", PersistenceData.tankRemain_microL);
    Debug_pushMessage("TravelDistance_highRes_mm: %d\n", PersistenceData.TravelDistance_highRes_mm);
    Debug_pushMessage("checksum: %d\n", PersistenceData.checksum);
    Debug_pushMessage("PSD Adress: 0x%04X\n", globals.eePersistanceAdress);
}

/**
 * @brief Prints information related to WiFi to the debug output.
 */
void Debug_printWifiInfo()
{
    // Add relevant code here if needed
}

/**
 * @brief Checks the EEPROM data integrity by calculating and comparing checksums.
 *        Prints the result to the debug output.
 */
void Debug_CheckEEPOM()
{
    // Check PersistenceData EEPROM checksum
    uint32_t checksum = PersistenceData.checksum;
    PersistenceData.checksum = 0;

    if (Checksum_EEPROM((uint8_t *)&PersistenceData, sizeof(PersistenceData)) == checksum)
    {
        Debug_pushMessage("PersistenceData EEPROM Checksum OK\n");
    }
    else
    {
        Debug_pushMessage("PersistenceData EEPROM Checksum BAD\n");
    }

    PersistenceData.checksum = checksum;

    // Check LubeConfig EEPROM checksum
    checksum = LubeConfig.checksum;
    LubeConfig.checksum = 0;

    if (Checksum_EEPROM((uint8_t *)&LubeConfig, sizeof(LubeConfig)) == checksum)
    {
        Debug_pushMessage("LubeConfig EEPROM Checksum OK\n");
    }
    else
    {
        Debug_pushMessage("LubeConfig EEPROM Checksum BAD\n");
    }
    LubeConfig.checksum = checksum;
}

/**
 * @brief Displays Diagnostic Trouble Codes (DTCs) along with their timestamps,
 *        status, and severity in a formatted manner.
 */
void Debug_ShowDTCs()
{
    char buff_timestamp[16]; // Format: DD-hh:mm:ss:xxx
    char buff_active[9];

    // Header for the DTC display
    Debug_pushMessage("\n      timestamp | DTC-Nr. |   status | severity\n");

    // Iterate through DTCStorage and display each entry
    for (uint32_t i = 0; i < MAX_DTC_STORAGE; i++)
    {
        if (DTCStorage[i].Number < DTC_LAST_DTC)
        {
            // Format timestamp
            sprintf(buff_timestamp, "%02d-%02d:%02d:%02d:%03d",
                    DTCStorage[i].timestamp / 86400000,    // Days
                    DTCStorage[i].timestamp / 360000 % 24, // Hours
                    DTCStorage[i].timestamp / 60000 % 60,  // Minutes
                    DTCStorage[i].timestamp / 1000 % 60,   // Seconds
                    DTCStorage[i].timestamp % 1000);       // Milliseconds

            // Determine DTC status
            if (DTCStorage[i].active == DTC_ACTIVE)
                strcpy(buff_active, "active");
            else if (DTCStorage[i].active == DTC_PREVIOUS)
                strcpy(buff_active, "previous");
            else
                strcpy(buff_active, "none");

            // Display DTC information
            Debug_pushMessage("%s   %7d   %8s   %8d\n", buff_timestamp, DTCStorage[i].Number, buff_active);
        }
    }
}

/**
 * @brief Displays the help commands for debugging through Serial or WebUI.
 *        Each command is printed individually in a formatted manner.
 */
void Debug_printHelp()
{
    char buff[64];

    // Iterate through helpCmd and display each command
    for (unsigned int i = 0; i < sizeof(helpCmd) / 63; i++)
    {
        // Copy a portion of helpCmd to buff for display
        memcpy_P(buff, (helpCmd + (i * 63)), 63);
        buff[63] = 0;

        // Display the help command
        Debug_pushMessage(buff);
    }
}