/* Copyright 2018 Espressif Systems (Shanghai) PTE LTD
 *
 * Licensed 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.
 */

#ifndef PORT_COMMON_H_
#define PORT_COMMON_H_

#include "freertos/FreeRTOS.h"
#include "freertos/xtensa_api.h"
#include "esp_log.h"                // for ESP_LOGE macro
#include "mbconfig.h"

#define INLINE                      inline
#define PR_BEGIN_EXTERN_C           extern "C" {
#define PR_END_EXTERN_C             }

#define MB_PORT_TAG                     "MB_PORT_COMMON"

#define MB_BAUD_RATE_DEFAULT            (115200)
#define MB_QUEUE_LENGTH                 (CONFIG_FMB_QUEUE_LENGTH)

#define MB_SERIAL_TASK_PRIO             (CONFIG_FMB_PORT_TASK_PRIO)
#define MB_SERIAL_TASK_STACK_SIZE       (CONFIG_FMB_PORT_TASK_STACK_SIZE)
#define MB_SERIAL_TOUT                  (3) // 3.5*8 = 28 ticks, TOUT=3 -> ~24..33 ticks

// Set buffer size for transmission
#define MB_SERIAL_BUF_SIZE              (CONFIG_FMB_SERIAL_BUF_SIZE)

// common definitions for serial port implementations
#define MB_SERIAL_TX_TOUT_MS            (100)
#define MB_SERIAL_TX_TOUT_TICKS         (pdMS_TO_TICKS(MB_SERIAL_TX_TOUT_MS)) // timeout for transmission
#define MB_SERIAL_RX_TOUT_MS            (1)
#define MB_SERIAL_RX_TOUT_TICKS         (pdMS_TO_TICKS(MB_SERIAL_RX_TOUT_MS)) // timeout for receive

#define MB_SERIAL_RESP_LEN_MIN          (4)

// Common definitions for TCP port
#define MB_TCP_BUF_SIZE                 (256 + 7) // Must hold a complete Modbus TCP frame.
#define MB_TCP_DEFAULT_PORT             (CONFIG_FMB_TCP_PORT_DEFAULT)
#define MB_TCP_STACK_SIZE               (CONFIG_FMB_PORT_TASK_STACK_SIZE)
#define MB_TCP_TASK_PRIO                (CONFIG_FMB_PORT_TASK_PRIO)

#define MB_TCP_READ_TIMEOUT_MS          (100) // read timeout in mS
#define MB_TCP_READ_TIMEOUT             (pdMS_TO_TICKS(MB_TCP_READ_TIMEOUT_MS))
#define MB_TCP_SEND_TIMEOUT_MS          (500) // send event timeout in mS
#define MB_TCP_SEND_TIMEOUT             (pdMS_TO_TICKS(MB_TCP_SEND_TIMEOUT_MS))
#define MB_TCP_PORT_MAX_CONN            (CONFIG_FMB_TCP_PORT_MAX_CONN)

#define MB_TCP_FRAME_LOG_BUFSIZE        (256)

// Define number of timer reloads per 1 mS
#define MB_TIMER_TICS_PER_MS            (20UL)

#define MB_TCP_DEBUG                    (LOG_LOCAL_LEVEL >= ESP_LOG_DEBUG) // Enable legacy debug output in TCP module.

#define MB_TCP_GET_FIELD(buffer, field) ((USHORT)((buffer[field] << 8U) | buffer[field + 1]))

#define MB_PORT_CHECK(a, ret_val, str, ...) \
    if (!(a)) { \
        ESP_LOGE(MB_PORT_TAG, "%s(%u): " str, __FUNCTION__, __LINE__, ##__VA_ARGS__); \
        return ret_val; \
    }

#ifdef __cplusplus
PR_BEGIN_EXTERN_C
#endif /* __cplusplus */

#ifndef TRUE
#define TRUE            1
#endif

#ifndef FALSE
#define FALSE           0
#endif

typedef char    BOOL;

typedef unsigned char UCHAR;
typedef char    CHAR;

typedef unsigned short USHORT;
typedef short   SHORT;

typedef unsigned long ULONG;
typedef long    LONG;

#if MB_TCP_DEBUG
typedef enum
{
    MB_LOG_DEBUG,
    MB_LOG_INFO,
    MB_LOG_WARN,
    MB_LOG_ERROR
} eMBPortLogLevel;
#endif

typedef enum
{
    MB_PROTO_TCP,
    MB_PROTO_UDP,
} eMBPortProto;

typedef enum {
    MB_PORT_IPV4 = 0,                     /*!< TCP IPV4 addressing */
    MB_PORT_IPV6 = 1                      /*!< TCP IPV6 addressing */
} eMBPortIpVer;

void vMBPortEnterCritical(void);
void vMBPortExitCritical(void);

#define ENTER_CRITICAL_SECTION( ) { ESP_EARLY_LOGD(MB_PORT_TAG,"%s: Port enter critical.", __func__); \
                                    vMBPortEnterCritical(); }

#define EXIT_CRITICAL_SECTION( )  { vMBPortExitCritical(); \
                                    ESP_EARLY_LOGD(MB_PORT_TAG,"%s: Port exit critical", __func__); }

#define MB_PORT_CHECK_EVENT( event, mask ) ( event & mask )
#define MB_PORT_CLEAR_EVENT( event, mask ) do { event &= ~mask; } while(0)

// Legacy Modbus logging function
#if MB_TCP_DEBUG
void vMBPortLog( eMBPortLogLevel eLevel, const CHAR * szModule,
                    const CHAR * szFmt, ... );
void prvvMBTCPLogFrame( const CHAR * pucMsg, UCHAR * pucFrame, USHORT usFrameLen );
#endif

void vMBPortSetMode( UCHAR ucMode );
UCHAR ucMBPortGetMode( void );

#ifdef __cplusplus
PR_END_EXTERN_C
#endif /* __cplusplus */

#endif /* PORT_COMMON_H_ */