/*
 * Copyright (c) 2015, Freescale Semiconductor, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * o Redistributions of source code must retain the above copyright notice, this list
 *   of conditions and the following disclaimer.
 *
 * o Redistributions in binary form must reproduce the above copyright notice, this
 *   list of conditions and the following disclaimer in the documentation and/or
 *   other materials provided with the distribution.
 *
 * o Neither the name of Freescale Semiconductor, Inc. nor the names of its
 *   contributors may be used to endorse or promote products derived from this
 *   software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "fsl_notifier.h"

/*******************************************************************************
 * Definitions
 ******************************************************************************/

/*******************************************************************************
 * Prototypes
 ******************************************************************************/

/*******************************************************************************
 * Variables
 ******************************************************************************/

/*******************************************************************************
 * Code
 ******************************************************************************/

status_t NOTIFIER_CreateHandle(notifier_handle_t *notifierHandle,
                               notifier_user_config_t **configs,
                               uint8_t configsNumber,
                               notifier_callback_config_t *callbacks,
                               uint8_t callbacksNumber,
                               notifier_user_function_t userFunction,
                               void *userData)
{
    /* Check input parameter - at least one configuration is required and userFunction must exist */
    if ((configs == NULL) || (configsNumber == 0U) || (userFunction == NULL))
    {
        return kStatus_Fail;
    }
    /* Initialize handle structure */
    memset(notifierHandle, 0, sizeof(notifier_handle_t));
    /* Store references to user-defined configurations */
    notifierHandle->configsTable = configs;
    notifierHandle->configsNumber = configsNumber;
    /* Store references to user-defined callback configurations */
    if (callbacks != NULL)
    {
        notifierHandle->callbacksTable = callbacks;
        notifierHandle->callbacksNumber = callbacksNumber;
        /* If all callbacks return success, then the errorCallbackIndex is callbacksNumber */
        notifierHandle->errorCallbackIndex = callbacksNumber;
    }
    notifierHandle->userFunction = userFunction;
    notifierHandle->userData = userData;

    return kStatus_Success;
}

status_t NOTIFIER_SwitchConfig(notifier_handle_t *notifierHandle, uint8_t configIndex, notifier_policy_t policy)
{
    uint8_t currentStaticCallback = 0U;    /* Index to array of statically registered call-backs */
    status_t returnCode = kStatus_Success; /* Function return */

    notifier_notification_block_t notifyBlock;  /*  Callback notification block */
    notifier_callback_config_t *callbackConfig; /* Pointer to callback configuration */

    /* Set errorcallbackindex as callbacksNumber, which means no callback error now */
    notifierHandle->errorCallbackIndex = notifierHandle->callbacksNumber;

    /* Requested configuration availability check */
    if (configIndex >= notifierHandle->configsNumber)
    {
        return kStatus_OutOfRange;
    }

    /* Initialization of local variables from the Notifier handle structure */

    notifyBlock.policy = policy;
    notifyBlock.targetConfig = notifierHandle->configsTable[configIndex];
    notifyBlock.notifyType = kNOTIFIER_NotifyBefore;

    /* From all statically registered call-backs... */
    for (currentStaticCallback = 0U; currentStaticCallback < notifierHandle->callbacksNumber; currentStaticCallback++)
    {
        callbackConfig = &(notifierHandle->callbacksTable[currentStaticCallback]);
        /* ...notify only those which asked to be called before the configuration switch */
        if (((uint32_t)callbackConfig->callbackType) & kNOTIFIER_CallbackBefore)
        {
            /* In case that call-back returned error code mark it, store the call-back handle and eventually cancel
            * the configuration switch */
            if (callbackConfig->callback(&notifyBlock, callbackConfig->callbackData) != kStatus_Success)
            {
                returnCode = kStatus_NOTIFIER_ErrorNotificationBefore;
                notifierHandle->errorCallbackIndex = currentStaticCallback;
                /* If not forcing configuration switch, call all already notified call-backs to revert their state
                * as the switch is canceled */
                if (policy != kNOTIFIER_PolicyForcible)
                {
                    break;
                }
            }
        }
    }

    /* Set configuration */

    /* In case that any call-back returned error code and  policy doesn't force the configuration set, go to after
     * switch call-backs */
    if ((policy == kNOTIFIER_PolicyForcible) || (returnCode == kStatus_Success))
    {
        returnCode = notifierHandle->userFunction(notifierHandle->configsTable[configIndex], notifierHandle->userData);
        if (returnCode != kStatus_Success)
        {
            return returnCode;
        }
        /* Update current configuration index */
        notifierHandle->currentConfigIndex = configIndex;
        notifyBlock.notifyType = kNOTIFIER_NotifyAfter;
        /* From all statically registered call-backs... */
        for (currentStaticCallback = 0U; currentStaticCallback < notifierHandle->callbacksNumber;
             currentStaticCallback++)
        {
            callbackConfig = &(notifierHandle->callbacksTable[currentStaticCallback]);
            /* ...notify only those which asked to be called after the configruation switch */
            if (((uint32_t)callbackConfig->callbackType) & kNOTIFIER_CallbackAfter)
            {
                /* In case that call-back returned error code mark it and store the call-back handle */
                if (callbackConfig->callback(&notifyBlock, callbackConfig->callbackData) != kStatus_Success)
                {
                    returnCode = kStatus_NOTIFIER_ErrorNotificationAfter;
                    notifierHandle->errorCallbackIndex = currentStaticCallback;
                    if (policy != kNOTIFIER_PolicyForcible)
                    {
                        break;
                    }
                }
            }
        }
    }
    else
    {
        /* End of unsuccessful switch */
        notifyBlock.notifyType = kNOTIFIER_NotifyRecover;
        while (currentStaticCallback--)
        {
            callbackConfig = &(notifierHandle->callbacksTable[currentStaticCallback]);
            if (((uint32_t)callbackConfig->callbackType) & kNOTIFIER_CallbackBefore)
            {
                callbackConfig->callback(&notifyBlock, callbackConfig->callbackData);
            }
        }
    }

    return returnCode;
}

uint8_t NOTIFIER_GetErrorCallbackIndex(notifier_handle_t *notifierHandle)
{
    return notifierHandle->errorCallbackIndex;
}