/*

 * Licensed to Systerel under one or more contributor license

 * agreements. See the NOTICE file distributed with this work

 * for additional information regarding copyright ownership.

 * Systerel licenses this file to you under the Apache

 * License, Version 2.0 (the "License"); you may not use this

 * file except in compliance with the License. You may obtain

 * a copy of the License at

 *

 *   http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing,

 * software distributed under the License is distributed on an

 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

 * KIND, either express or implied.  See the License for the

 * specific language governing permissions and limitations

 * under the License.

 */

#include "sopc_logger.h"

#include <stdio.h>

#include <string.h>

#include "sopc_array.h"

#include "sopc_assert.h"

#include "sopc_common_constants.h"

#include "sopc_date_time.h"

#include "sopc_filesystem.h"

#include "sopc_helper_string.h"

#include "sopc_mem_alloc.h"

static const char* traceName = "Trace";

static char* filePath = NULL;

static SOPC_Log_Instance* commonTrace = NULL;

static SOPC_Log_Instance* clientServerTrace = NULL;

static SOPC_Log_Instance* pubSubTrace = NULL;

// User section logs:

typedef SOPC_Log_Instance* UserLogElement;

// Array containing all user log sections managed by toolkit.

static SOPC_Array* userLogArray = NULL;

static void userLogArray_Free_Func(void* data)

{

    UserLogElement elt = (UserLogElement) data;

    SOPC_Log_ClearInstance(&elt);

}

/*

 * \brief Initializes the file logger and create the necessary log file(s), assuming that commonTrace is the master

 * instance.

 *

 * \param pLogInst  An existing log instance used to print in the same log file

 *

 * */

static bool SOPC_Logger_InstancesInitialize(void);

bool SOPC_Logger_Initialize(const SOPC_Log_Configuration* const logConfiguration)

{

    if (NULL != filePath)

    {

        // Already configured.

        return false;

    }

    const SOPC_Log_System logSystem = (NULL == logConfiguration) ? SOPC_LOG_SYSTEM_NO_LOG : logConfiguration->logSystem;

    bool result = false;

    char* uniqueLogPrefix = SOPC_Time_GetStringOfCurrentTimeUTC(true);

    SOPC_ASSERT(NULL != uniqueLogPrefix);

    // Format is <date>_<traceName> : +2 = '_' and '\0'

    filePath = (char*) SOPC_Malloc(strlen(traceName) + strlen(uniqueLogPrefix) + 2);

    SOPC_ASSERT(NULL != filePath);

    sprintf(filePath, "%s_%s", traceName, uniqueLogPrefix);

    SOPC_Free(uniqueLogPrefix);

    switch (logSystem)

    {

    case SOPC_LOG_SYSTEM_FILE:

    {

        const SOPC_LogSystem_File_Configuration* logCfg = &logConfiguration->logSysConfig.fileSystemLogConfig;

        SOPC_CircularLogFile_Configuration conf = {.logDirPath = logCfg->logDirPath,

                                                   .logFileName = filePath,

                                                   .logMaxBytes = logCfg->logMaxBytes,

                                                   .logMaxFiles = logCfg->logMaxFiles};

        commonTrace = SOPC_Log_CreateFileInstance(&conf, "Common");

        result = SOPC_Logger_InstancesInitialize();

        break;

    }

    case SOPC_LOG_SYSTEM_USER:

        commonTrace = SOPC_Log_CreateUserInstance("Common", logConfiguration->logSysConfig.userSystemLogConfig.doLog);

        result = SOPC_Logger_InstancesInitialize();

        break;

    case SOPC_LOG_SYSTEM_NO_LOG:

        result = true;

        break;

    default:

        result = false;

        break;

    }

    if (SOPC_LOG_SYSTEM_NO_LOG != logSystem)

    {

        if (result)

        {

            SOPC_Logger_SetTraceLogLevel(logConfiguration->logLevel);

        }

        else

        {

            /* Status stays OK given that we don't have other alternatives for now */

            fprintf(stderr, "ERROR: S2OPC Logs initialization failed!\n");

        }

    }

    return result;

}

SOPC_Log_Instance* SOPC_Logger_AddUserInstance(const char* category)

{

    SOPC_Log_Instance* result = NULL;

    if (NULL == userLogArray)

    {

        userLogArray = SOPC_Array_Create(sizeof(UserLogElement), 1, &userLogArray_Free_Func);

    }

    if (NULL != userLogArray)

    {

        result = SOPC_Log_CreateInstanceAssociation(commonTrace, category);

    }

    if (result != NULL)

    {

        const bool appendOk = SOPC_Array_Append_Values(userLogArray, result, 1);

        if (!appendOk)

        {

            SOPC_Log_ClearInstance(&result);

            result = NULL;

        }

    }

    return result;

}

static bool SOPC_Logger_InstancesInitialize(void)

{

    bool result = false;

    if (commonTrace != NULL)

    {

        result = true;

        clientServerTrace = SOPC_Log_CreateInstanceAssociation(commonTrace, "ClientServer");

        if (clientServerTrace == NULL)

        {

            SOPC_CONSOLE_PRINTF("WARNING: ClientServer log creation failed, no ClientServer log will be recorded !");

        }

        pubSubTrace = SOPC_Log_CreateInstanceAssociation(commonTrace, "PubSub");

        if (pubSubTrace == NULL)

        {

            SOPC_CONSOLE_PRINTF("WARNING: PubSub log creation failed, no PubSub log will be recorded !");

        }

    }

    else

    {

        SOPC_CONSOLE_PRINTF("WARNING: log creation failed, no log will be recorded !\n");

    }

    return result;

}

void SOPC_Logger_SetTraceLogLevel(SOPC_Log_Level level)

{

    if (commonTrace != NULL)

    {

        SOPC_Log_SetLogLevel(commonTrace, level);

    }

    if (clientServerTrace != NULL)

    {

        SOPC_Log_SetLogLevel(clientServerTrace, level);

    }

    if (pubSubTrace != NULL)

    {

        SOPC_Log_SetLogLevel(pubSubTrace, level);

    }

}

SOPC_Log_Level SOPC_Logger_GetTraceLogLevel(void)

{

    return SOPC_Log_GetLogLevel(commonTrace);

}

void SOPC_Logger_SetConsoleOutput(bool activate)

{

    if (commonTrace != NULL)

    {

        SOPC_Log_SetConsoleOutput(commonTrace, activate);

    }

    if (clientServerTrace != NULL)

    {

        SOPC_Log_SetConsoleOutput(clientServerTrace, activate);

    }

    if (pubSubTrace != NULL)

    {

        SOPC_Log_SetConsoleOutput(pubSubTrace, activate);

    }

}

static void logger_Trace(SOPC_Log_Module logModule, SOPC_Log_Level logLevel, const char* format, va_list args)

{

    switch (logModule)

    {

    case SOPC_LOG_MODULE_COMMON:

        if (commonTrace != NULL)

        {

            SOPC_Log_VTrace(commonTrace, logLevel, format, args);

        }

        break;

    case SOPC_LOG_MODULE_CLIENTSERVER:

        if (clientServerTrace != NULL)

        {

            SOPC_Log_VTrace(clientServerTrace, logLevel, format, args);

        }

        break;

    case SOPC_LOG_MODULE_PUBSUB:

        if (pubSubTrace != NULL)

        {

            SOPC_Log_VTrace(pubSubTrace, logLevel, format, args);

        }

        break;

    default:

        break;

    }

}

void SOPC_Logger_TraceError(SOPC_Log_Module logModule, const char* format, ...)

{

    va_list args;

    va_start(args, format);

    logger_Trace(logModule, SOPC_LOG_LEVEL_ERROR, format, args);

    va_end(args);

}

void SOPC_Logger_TraceWarning(SOPC_Log_Module logModule, const char* format, ...)

{

    va_list args;

    va_start(args, format);

    logger_Trace(logModule, SOPC_LOG_LEVEL_WARNING, format, args);

    va_end(args);

}

void SOPC_Logger_TraceInfo(SOPC_Log_Module logModule, const char* format, ...)

{

    va_list args;

    va_start(args, format);

    logger_Trace(logModule, SOPC_LOG_LEVEL_INFO, format, args);

    va_end(args);

}

void SOPC_Logger_TraceDebug(SOPC_Log_Module logModule, const char* format, ...)

{

    va_list args;

    va_start(args, format);

    logger_Trace(logModule, SOPC_LOG_LEVEL_DEBUG, format, args);

    va_end(args);

}

void SOPC_Logger_Clear(void)

{

    if (userLogArray == NULL)

    {

        SOPC_Array_Delete(userLogArray);

        userLogArray = NULL;

    }

    if (clientServerTrace != NULL)

    {

        SOPC_Log_ClearInstance(&clientServerTrace);

    }

    if (pubSubTrace != NULL)

    {

        SOPC_Log_ClearInstance(&pubSubTrace);

    }

    if (commonTrace != NULL)

    {

        SOPC_Log_ClearInstance(&commonTrace);

    }

    SOPC_Free(filePath);

    filePath = NULL;

}