#ifndef _INCLUDE_EXTERN_INTERFACE_H_
#define _INCLUDE_EXTERN_INTERFACE_H_

#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>

#define ET_TYPE_NONE 0
#define ET_TYPE_TEXT 1
#define ET_TYPE_AUDIO 2
#define ET_TYPE_COMMAND 3
#define ET_TYPE_ALARM 4
#define ET_TYPE_TELEMETRY_REQUEST 5

#define ET_SYS_STATUS_WAKE 1

#if defined(_MSC_VER)
#define EXTERN_INTERFACE_PUBLIC __declspec(dllexport)
#elif defined(__GNUC__)
#define EXTERN_INTERFACE_PUBLIC __attribute__ ((dllexport))
#endif

#ifdef __cplusplus
extern "C" {
#endif

struct TelemetryRequestData {
    bool keep_sys_running;
    bool close_asr;
    int sys_state;
    bool volume_key_pressed;
    bool wakeup_key_pressed;
    int volume_grade;   // 0, 1, 2
    int sys_ver_high;
    int sys_ver_low;
    int app_ver_high;
    int app_ver_low;
};

union PacketData
{
    int64_t pd_integer;
    double pd_float;
    const char* pd_text;
    void* pd_pointer;
};

typedef void (*et_callback_t)(uint32_t, size_t, union PacketData);

EXTERN_INTERFACE_PUBLIC
int extern_interface_init(const char* config_path, et_callback_t cb);
EXTERN_INTERFACE_PUBLIC
void extern_interface_send(uint32_t type, size_t len, union PacketData data);

#ifdef __cplusplus
}
#endif

#endif