/*
 * Tencent is pleased to support the open source community by making IoT Hub
 available.
 * Copyright (C) 2018-2020 THL A29 Limited, a Tencent company. All rights
 reserved.

 * Licensed under the MIT License (the "License"); you may not use this file
 except in
 * compliance with the License. You may obtain a copy of the License at
 * http://opensource.org/licenses/MIT

 * 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 __AT_CLIENT_H__
#define __AT_CLIENT_H__

#ifdef __cplusplus
extern "C" {
#endif

#include "config.h"
#include "stddef.h"
#include "utils_ringbuff.h"

#define AT_FRAME_VERSION "1.0.0"

#define AT_CMD_NAME_LEN 16
#define AT_END_MARK_LEN 4

#define CLINET_BUFF_LEN          (1024)
#define RING_BUFF_LEN            CLINET_BUFF_LEN  // uart ring buffer len
#define GET_CHAR_TIMEOUT_MS      (5000)
#define CMD_RESPONSE_INTERVAL_MS (100)

typedef void (*ParserFunc)(void *userContex);

typedef enum {
    AT_STATUS_UNINITIALIZED = 0,
    AT_STATUS_INITIALIZED   = 0x55,
    AT_STATUS_BUSY          = 0xaa,
} at_status;

enum at_resp_status {
    AT_RESP_OK        = 0,  /* AT response end is OK */
    AT_RESP_ERROR     = -1, /* AT response end is ERROR */
    AT_RESP_TIMEOUT   = -2, /* AT response is timeout */
    AT_RESP_BUFF_FULL = -3, /* AT response buffer is full */
};

typedef enum at_resp_status at_resp_status_t;

typedef struct _at_response_ {
    /* response buffer */
    char *buf;
    /* the maximum response buffer size */
    int buf_size;
    /* the number of setting response lines
     * == 0: the response data will auto return when received 'OK' or 'ERROR'
     * != 0: the response data will return when received setting lines number data
     */
    int line_num;
    /* the count of received response lines */
    int line_counts;
    /* the maximum response time */
    uint32_t timeout;
} at_response;

typedef at_response *at_response_t;

/* URC(Unsolicited Result Code) object, such as: 'RING', 'READY' request by AT
 * server */
typedef struct _at_urc_ {
    const char *cmd_prefix;
    const char *cmd_suffix;
    void (*func)(const char *data, size_t size);
} at_urc;

typedef at_urc *at_urc_t;

typedef struct _at_client_ {
    at_status status;
    char      end_sign;

    ring_buff_t pRingBuff;

    char *   recv_buffer;
    uint32_t recv_bufsz;
    uint32_t cur_recv_len;
    void *   lock;  // pre cmd take the lock wait for resp , another cmd need wait for
                    // unlock

    at_response_t    resp;
    at_resp_status_t resp_status;

    const at_urc *urc_table;
    uint16_t      urc_table_size;

#ifdef AT_OS_USED
    void *     resp_sem;  // resp received, send sem to notic ack wait
    ParserFunc parser;    // RX parser
#else
// bool resp_notice;
#endif
} at_client;

typedef at_client *at_client_t;

/* AT client initialize and start*/
int at_client_init(at_client_t *pClient);

/* AT client deinitial*/
int at_client_deinit(at_client_t pClient);

/* get AT client handle*/
at_client_t at_client_get(void);

/*AT connect detect*/
int at_client_wait_connect(uint32_t timeout);

/*wrapper for os and nonos delay*/
void     at_delayms(uint32_t delayms);
void     at_setFlag(uint32_t flag);
void     at_clearFlag(uint32_t flag);
uint32_t at_getFlag(void);
bool     at_waitFlag(uint32_t flag, uint32_t timeout);

/* ========================== multiple AT client function
 * ============================ */
/* set AT client a line end sign */
void at_set_end_sign(char ch);

/* Set URC(Unsolicited Result Code) table */
void at_set_urc_table(at_client_t client, const at_urc_t table, uint32_t size);

/* AT client send or receive data */
int at_client_send(at_client_t client, const char *buf, int size, uint32_t timeout);
int at_client_obj_recv(char *buf, int size, int timeout);

/* AT client send commands to AT server and waiter response */
int at_obj_exec_cmd(at_response_t resp, const char *cmd_expr, ...);

#define at_exec_cmd(resp, ...)             at_obj_exec_cmd(resp, __VA_ARGS__)
#define at_client_recv(buf, size, timeout) at_client_obj_recv(buf, size, timeout)

/* AT response object create and delete */
at_response_t at_create_resp(uint32_t buf_size, uint32_t line_num, uint32_t timeout);
void          at_delete_resp(at_response_t resp);

/* AT response line buffer get and parse response buffer arguments */
const char *at_resp_get_line(at_response_t resp, uint32_t resp_line);
const char *at_resp_get_line_by_kw(at_response_t resp, const char *keyword);
int         at_resp_parse_line_args(at_response_t resp, uint32_t resp_line, const char *resp_expr, ...);
int         at_resp_parse_line_args_by_kw(at_response_t resp, const char *keyword, const char *resp_expr, ...);

/* ========================== single AT client function
 * ============================ */
void at_client_yeild(at_urc *expect_urc, uint32_t timeout);

#ifdef __cplusplus
}
#endif

#endif /* __AT_H__ */