/**
 * @file	
 * @author	chipsea
 * @brief	
 * @version	0.1
 * @date	2020-11-30
 * @copyright Copyright (c) 2020, CHIPSEA Co., Ltd.
 * @note
 */
#ifndef CENTRAL_H
#define CENTRAL_H

#ifdef __cplusplus
extern "C"
{
#endif

/*********************************************************************
 * INCLUDES
 */
#include "bcomdef.h"
#include "OSAL.h"
#include "gap.h"

/*********************************************************************
 * CONSTANTS
 */

/** @defgroup GAPCENTRALROLE_PROFILE_PARAMETERS GAP Central Role Parameters
 * @{
 */
#define GAPCENTRALROLE_IRK                 0x400  //!< Identity Resolving Key. Read/Write. Size is uint8[KEYLEN]. Default is all 0, which means that the IRK will be randomly generated.
#define GAPCENTRALROLE_SRK                 0x401  //!< Signature Resolving Key. Read/Write. Size is uint8[KEYLEN]. Default is all 0, which means that the SRK will be randomly generated.
#define GAPCENTRALROLE_SIGNCOUNTER         0x402  //!< Sign Counter. Read/Write. Size is uint32. Default is 0.
#define GAPCENTRALROLE_BD_ADDR             0x403  //!< Device's Address. Read Only. Size is uint8[B_ADDR_LEN]. This item is read from the controller.
#define GAPCENTRALROLE_MAX_SCAN_RES        0x404  //!< Maximum number of discover scan results to receive. Default is 0 = unlimited.
/** @} End GAPCENTRALROLE_PROFILE_PARAMETERS */

/**
 * Number of simultaneous links with periodic RSSI reads
 */
#ifndef GAPCENTRALROLE_NUM_RSSI_LINKS
#define GAPCENTRALROLE_NUM_RSSI_LINKS     4
#endif

/*********************************************************************
 * VARIABLES
 */

/*********************************************************************
 * MACROS
 */

/*********************************************************************
 * TYPEDEFS
 */

/**
 * Central Event Structure
 */
typedef union
{
  gapEventHdr_t             gap;                //!< GAP_MSG_EVENT and status.
  gapDeviceInitDoneEvent_t  initDone;           //!< GAP initialization done.
  gapDeviceInfoEvent_t      deviceInfo;         //!< Discovery device information event structure.
  gapDevDiscEvent_t         discCmpl;           //!< Discovery complete event structure.
  gapEstLinkReqEvent_t      linkCmpl;           //!< Link complete event structure.
  gapLinkUpdateEvent_t      linkUpdate;         //!< Link update event structure.
  gapTerminateLinkEvent_t   linkTerminate;      //!< Link terminated event structure.
} gapCentralRoleEvent_t;

/**
 * RSSI Read Callback Function
 */
typedef void (*pfnGapCentralRoleRssiCB_t)
(
  uint16 connHandle,                    //!< Connection handle.
  int8  rssi                            //!< New RSSI value.
);

/**
 * Central Event Callback Function
 */
typedef void (*pfnGapCentralRoleEventCB_t)
(
  gapCentralRoleEvent_t *pEvent         //!< Pointer to event structure.
);

/**
 * Central Callback Structure
 */
typedef struct
{
  pfnGapCentralRoleRssiCB_t   rssiCB;   //!< RSSI callback.
  pfnGapCentralRoleEventCB_t  eventCB;  //!< Event callback.
} gapCentralRoleCB_t;

/*********************************************************************
 * VARIABLES
 */

/*********************************************************************
 * API FUNCTIONS
 */

/*-------------------------------------------------------------------
 * Central Profile Public APIs
 */

/**
 * @defgroup CENTRAL_PROFILE_API Central Profile API Functions
 *
 * @{
 */

/**
 * @brief   Start the device in Central role.  This function is typically
 *          called once during system startup.
 *
 * @param   pAppCallbacks - pointer to application callbacks
 *
 * @return  SUCCESS: Operation successful.<BR>
 *          bleAlreadyInRequestedMode: Device already started.<BR>
 */
extern bStatus_t GAPCentralRole_StartDevice( gapCentralRoleCB_t *pAppCallbacks );

/**
 * @brief   Set a parameter in the Central Profile.
 *
 * @param   param - profile parameter ID: @ref GAPCENTRALROLE_PROFILE_PARAMETERS
 * @param   len - length of data to write
 * @param   pValue - pointer to data to write.  This is dependent on
 *          the parameter ID and WILL be cast to the appropriate
 *          data type.
 *
 * @return  SUCCESS: Operation successful.<BR>
 *          INVALIDPARAMETER: Invalid parameter ID.<BR>
 */
extern bStatus_t GAPCentralRole_SetParameter( uint16 param, uint8 len, void *pValue );

/**
 * @brief   Get a parameter in the Central Profile.
 *
 * @param   param - profile parameter ID: @ref GAPCENTRALROLE_PROFILE_PARAMETERS
 * @param   pValue - pointer to buffer to contain the read data
 *
 * @return  SUCCESS: Operation successful.<BR>
 *          INVALIDPARAMETER: Invalid parameter ID.<BR>
 */
extern bStatus_t GAPCentralRole_GetParameter( uint16 param, void *pValue );

/**
 * @brief   Terminate a link.
 *
 * @param   connHandle - connection handle of link to terminate
 *          or @ref GAP_CONN_HANDLE_DEFINES
 *
 * @return  SUCCESS: Terminate started.<BR>
 *          bleIncorrectMode: No link to terminate.<BR>
 */
extern bStatus_t GAPCentralRole_TerminateLink( uint16 connHandle );

/**
 * @brief   Establish a link to a peer device.
 *
 * @param   highDutyCycle -  TRUE to high duty cycle scan, FALSE if not
 * @param   whiteList - determines use of the white list: @ref GAP_WHITELIST_DEFINES
 * @param   addrTypePeer - address type of the peer device: @ref GAP_ADDR_TYPE_DEFINES
 * @param   peerAddr - peer device address
 *
 * @return  SUCCESS: started establish link process.<BR>
 *          bleIncorrectMode: invalid profile role.<BR>
 *          bleNotReady: a scan is in progress.<BR>
 *          bleAlreadyInRequestedMode: can?t process now.<BR>
 *          bleNoResources: too many links.<BR>
 */
extern bStatus_t GAPCentralRole_EstablishLink( uint8 highDutyCycle, uint8 whiteList,
                                               uint8 addrTypePeer, uint8 *peerAddr );

/**
 * @brief   Update the link connection parameters.
 *
 * @param   connHandle - connection handle
 * @param   connIntervalMin - minimum connection interval in 1.25ms units
 * @param   connIntervalMax - maximum connection interval in 1.25ms units
 * @param   connLatency - number of LL latency connection events
 * @param   connTimeout - connection timeout in 10ms units
 *
 * @return  SUCCESS: Connection update started started.<BR>
 *          bleIncorrectMode: No connection to update.<BR>
 */
extern bStatus_t GAPCentralRole_UpdateLink( uint16 connHandle, uint16 connIntervalMin,
                                            uint16 connIntervalMax, uint16 connLatency,
                                            uint16 connTimeout );
/**
 * @brief   Start a device discovery scan.
 *
 * @param   mode - discovery mode: @ref GAP_DEVDISC_MODE_DEFINES
 * @param   activeScan - TRUE to perform active scan
 * @param   whiteList - TRUE to only scan for devices in the white list
 *
 * @return  SUCCESS: Discovery scan started.<BR>
 *          bleIncorrectMode: Invalid profile role.<BR>
 *          bleAlreadyInRequestedMode: Not available.<BR>
 */
extern bStatus_t GAPCentralRole_StartDiscovery( uint8 mode, uint8 activeScan, uint8 whiteList );

/**
 * @brief   Cancel a device discovery scan.
 *
 * @return  SUCCESS: Cancel started.<BR>
 *          bleInvalidTaskID: Not the task that started discovery.<BR>
 *          bleIncorrectMode: Not in discovery mode.<BR>
 */
extern bStatus_t GAPCentralRole_CancelDiscovery( void );

/**
 * @brief   Start periodic RSSI reads on a link.
 *
 * @param   connHandle - connection handle of link
 * @param   period - RSSI read period in ms
 *
 * @return  SUCCESS: Terminate started.<BR>
 *          bleIncorrectMode: No link.<BR>
 *          bleNoResources: No resources.<BR>
 */
extern bStatus_t GAPCentralRole_StartRssi( uint16 connHandle, uint16 period );

/**
 * @brief   Cancel periodic RSSI reads on a link.
 *
 * @param   connHandle - connection handle of link
 *
 * @return  SUCCESS: Operation successful.<BR>
 *          bleIncorrectMode: No link.<BR>
 */
extern bStatus_t GAPCentralRole_CancelRssi(uint16 connHandle );

/**
 * @}
 */

/*-------------------------------------------------------------------
 * TASK API - These functions must only be called by OSAL.
 */

/**
 * @internal
 *
 * @brief   Central Profile Task initialization function.
 *
 * @param   taskId - Task ID.
 *
 * @return  void
 */
extern void GAPCentralRole_Init( uint8 taskId );

/**
 * @internal
 *
 * @brief   Central Profile Task event processing function.
 *
 * @param   taskId - Task ID
 * @param   events - Events.
 *
 * @return  events not processed
 */
extern uint16 GAPCentralRole_ProcessEvent( uint8 taskId, uint16 events );

/*********************************************************************
*********************************************************************/

#ifdef __cplusplus
}
#endif

#endif /* CENTRAL_H */