#ifndef SYSTEM_H
#define SYSTEM_H

#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/semphr.h"

#define DISABLE_GUI

enum
{
    ANGLE_XY = 0,
    ANGLE_XZ,
    ANGLE_YZ,
};



typedef struct
{
    float raw[3];
    float filtered[3];
    float angle;
} ImuData_t;

typedef struct SystemState_s
{
	ImuData_t imu;

	EventGroupHandle_t event;

    float zeroAngle;
    int primaryAxis;

    // BT event data
    int btDeviceIndex;

} SystemState_t;


#define MAX_INDICATION_ANGLE    7.5f
#define FILTER_COEFF            0.4f        // 0 to 1   Smaller number is heavier filter
#define PRIMARY_AXIS            ANGLE_YZ
#define RIFLE_AXIS              Y

#define EM_MAX_SUBSCRIBERS 8    // tweak as needed
#define EM_EVENT_NEW_DATA   (1UL<<0)
#define EM_EVENT_ERROR      (1UL<<1)
#define EM_EVENT_BT_REFRESH (1UL<<2)
#define EM_EVENT_BT_CONNECT (1UL<<3)
#define EM_EVENT_VOLUME_UP  (1UL<<4)
#define EM_EVENT_VOLUME_DOWN (1UL<<5)
// …add more event bit-masks here…

typedef struct {
    TaskHandle_t subscribers[EM_MAX_SUBSCRIBERS];
    size_t      count;
    SemaphoreHandle_t mutex;
} EventManager_t;

void system_init(void);
void system_setImuData(ImuData_t imu);

ImuData_t system_getImuData(void);

int system_getPrimaryAxis(void);
float system_getAngle(void);

void system_setZeroAngle(void);
void system_clearZeroAngle(void);
float system_getZeroAngle(void);

// Subscribe (register) current task to receive events
BaseType_t system_subscribe(TaskHandle_t task);

// Unsubscribe if you ever need
BaseType_t system_unsubscribe(TaskHandle_t task);

// Notify all subscribers of one or more event bits
void    system_notifyAll(uint32_t eventBits);

// BT-specific event functions
void system_requestBtRefresh(void);
void system_requestBtConnect(int device_index);
int system_getBtDeviceIndex(void);

// Volume control functions
void system_requestVolumeUp(void);
void system_requestVolumeDown(void);


#endif