#ifndef _DS_INNER_H_
#define _DS_INNER_H_

#include <stdint.h>
#include <pthread.h>

#include "list.h"
#include "dataserver_rb.h"

#ifdef __cplusplus
extern "C" {
#endif

/*Context of connection*/
struct ds_connection_s {
    struct list_head head;

    /*tmp buf for send*/
    uint8_t *buf;
    uint64_t data_cnt_in;
    uint64_t data_cnt_out;

    /*for debug*/
    uint8_t *dbg;
    int dbg_total;
    int dbg_size;
    void *server;
    void *dbg_dl;
    struct list_head controls;
    void (*dbg_free)(void *);

    pthread_t wr_thread;
    pthread_t rd_thread;
    int active;
    int wr_active;
    int rd_active;

    #define MAX_NAME_SIZE 255
    char device[MAX_NAME_SIZE + 1];
    char client[MAX_NAME_SIZE + 1];

    #define MAX_SETTINGS_SIZE 255
    char settings[MAX_SETTINGS_SIZE + 1];

    int (*init)(struct ds_connection_s *, void *arg);
    void (*deinit)(struct ds_connection_s *);
    int (*start)(struct ds_connection_s *);
    void (*stop)(struct ds_connection_s *);
    int (*read)(struct ds_connection_s *, void *, size_t);
    int (*write)(struct ds_connection_s *, void *, size_t);

    /*connection fd*/
    int fd;

    void *priv;

    /*ringbuffer*/
    ds_rb_t rb;

    pthread_mutex_t   lock;
};

typedef struct ds_connection_s ds_connection_t;

/*Context of server*/
struct ds_server_s {
    /*connections to the server*/
    struct list_head conns;

    pthread_t thread;
    int running;

    int (*init)(struct ds_server_s *, void *arg1, void *arg2);
    void (*deinit)(struct ds_server_s *);
    void (*stop)(struct ds_server_s *);

    /*the listened fd*/
    int fd;
    /*the event fd*/
    int evt_fd;

    void *priv;
};

typedef struct ds_server_s ds_server_t;

int ds_connection_manage_data_in(ds_connection_t *conn);
int ds_connection_manage_data_out(ds_connection_t *conn);
ds_connection_t* ds_connection_create(void);
int ds_connection_start(ds_server_t *server, ds_connection_t *conn, void *priv);
int ds_connection_stop(ds_connection_t *conn);
int ds_connection_cleanup(ds_connection_t *conn);
int ds_server_start(ds_server_t *server, void *arg1, void *arg2, void*(*task)(void*));
int ds_server_stop(ds_server_t *server);
int ds_server_cleanup_connections(ds_server_t *server, int force);

/**
 * @brief definition for control item structure
 */
typedef int (*cmd_process_fn_t)(ds_connection_t *conn,
        uint8_t *cmd, size_t cmd_size, uint8_t *resp, size_t resp_size);

typedef struct {
    struct list_head head;

    char cmd[64];
    char desc[128];
    cmd_process_fn_t fn;
} ds_control_t;


#ifdef __cplusplus
}
#endif

#endif