/* Copyright (c) 2015 Nordic Semiconductor. All Rights Reserved.
 *
 * The information contained herein is property of Nordic Semiconductor ASA.
 * Terms and conditions of usage are described in detail in NORDIC
 * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
 *
 * Licensees are granted free, non-transferable use of the information. NO
 * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
 * the file.
 *
 */


#ifndef GATTC_CACHE_MANAGER_H__
#define GATTC_CACHE_MANAGER_H__

#include <stdint.h>
#include "sdk_errors.h"
#include "ble.h"
#include "ble_gap.h"
#include "peer_manager_types.h"


/**
 * @cond NO_DOXYGEN
 * @defgroup gattc_cache_manager GATT Client Cache Manager
 * @ingroup peer_manager
 * @{
 * @brief An internal module of @ref peer_manager. A module for managing persistent storing of GATT
 *        attributes pertaining to the GATT client role of the local device.
 */


/**@brief Events that can come from the GATT Cache Manager module.
 */
typedef enum
{
    GCCM_EVT_REMOTE_DB_UPDATED,  /**< Values for the specified data has been updated in persistent storage. */
    GCCM_EVT_REMOTE_DB_STORED,   /**< New values for the specified data has been written in persistent storage. */
} gccm_evt_id_t;


typedef struct
{
    gccm_evt_id_t  evt_id;
    pm_peer_id_t   peer_id;
} gccm_evt_t;

/**@brief Event handler for events from the GATT Client Cache Manager module.
 *
 * @param[in]  event   The event that has happened.
 * @param[in]  peer    The id of the peer the event pertains to.
 * @param[in]  flags   The data the event pertains to.
 */
typedef void (*gccm_evt_handler_t)(gccm_evt_t const * p_event);


/**@brief Function for initializing the GATT Client Cache Manager module.
 *
 * @param[in]  evt_handler  Callback for events from the GATT Client Cache Manager module.
 *
 * @retval NRF_SUCCESS     Initialization was successful.
 * @retval NRF_ERROR_NULL  evt_handler was NULL.
 */
ret_code_t gccm_init(gccm_evt_handler_t evt_handler);


/**@brief Function for storing a discovered remote database persistently.
 *
 * @param[in]  peer_id      Peer to store the database for.
 * @param[in]  p_remote_db  Database values to store as an array. Can be NULL if n_services is 0.
 * @param[in]  n_services   Number of services in p_remote_db array. If 0, values are cleared.
 *
 * @retval NRF_SUCCESS              Store procedure successfully started.
 * @retval NRF_ERROR_NOT_FOUND      The peer id is invalid or unallocated.
 * @retval NRF_ERROR_INVALID_STATE  Module is not initialized.
 */
ret_code_t gccm_remote_db_store(pm_peer_id_t        peer_id,
                                ble_gatt_db_srv_t * p_remote_db,
                                uint32_t            n_services);


/**@brief Function for retrieving a persistently stored remote database.
 *
 * @param[in]    peer_id       Peer to retrieve data for.
 * @param[out]   p_remote_db  If p_n_services was large enough: Copied database values.
 * @param[inout] p_n_services In: Size of provided p_remote_db array. Out: Size of data in flash.
 *
 * @note p_n_services is always updated with the size of the data to be retrieved. The data is only
 *       copied if p_remote_db is large enough (p_n_services is large enough initially).
 *
 * @retval NRF_SUCCESS              Data retrieved successfully.
 * @retval NRF_ERROR_NOT_FOUND      The peer ID is invalid or unallocated.
 * @retval NRF_ERROR_INVALID_STATE  Module is not initialized.
 */
ret_code_t gccm_remote_db_retrieve(pm_peer_id_t        peer_id,
                                   ble_gatt_db_srv_t * p_remote_db,
                                   uint32_t          * p_n_services);


/** @} 
 * @endcond 
 */

#endif /* GATTC_CACHE_MANAGER_H__ */