/*
 * SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
 *
 * SPDX-License-Identifier: Unlicense OR CC0-1.0
 */

#ifndef __BT_APP_CORE_H__
#define __BT_APP_CORE_H__

#include <stdint.h>
#include <stdbool.h>
#include <stdio.h>
#include "esp_bt_defs.h"

/* log tag */
#define BT_APP_CORE_TAG             "BT_APP_CORE"

/* signal for dispatcher */
#define BT_APP_SIG_WORK_DISPATCH    (0x01)

/**
 * @brief    handler for the dispatched work
 *
 * @param [in] event  message event id
 * @param [in] param  pointer to the parameter
 */
typedef void (* bt_app_cb_t) (uint16_t event, void *param);

/* message to be sent */
typedef struct {
    uint16_t             sig;      /*!< signal to bt_app_task */
    uint16_t             event;    /*!< message event id */
    bt_app_cb_t          cb;       /*!< context switch callback */
    void                 *param;   /*!< parameter area needs to be last */
} bt_app_msg_t;

/**
 * @brief    parameter deep-copy function to be customized
 *
 * @param [in] p_dest  pointer to the destination
 * @param [in] p_src   pointer to the source
 * @param [in] len     data length in byte
 */
typedef void (* bt_app_copy_cb_t) (void *p_dest, void *p_src, int len);

/**
 * @brief    work dispatcher for the application task
 *
 * @param [in] p_cback       handler for the dispatched work (event handler)
 * @param [in] event         message event id
 * @param [in] p_params      pointer to the parameter
 * @param [in] param_len     length of the parameter
 * @param [in] p_copy_cback  parameter deep-copy function
 *
 * @return  true if work dispatch successfully, false otherwise
 */
bool bt_app_work_dispatch(bt_app_cb_t p_cback, uint16_t event, void *p_params, int param_len, bt_app_copy_cb_t p_copy_cback);

/**
 * @brief    start up the application task
 */
void bt_app_task_start_up(void);

/**
 * @brief    shut down the application task
 */
void bt_app_task_shut_down(void);

void bt_app_init(void);

/* Bluetooth device management for GUI */
#define MAX_BT_DEVICES 8  // Reduced from 20 to save memory
#define MAX_BT_NAME_LEN 32

typedef struct {
    esp_bd_addr_t bda;
    char name[MAX_BT_NAME_LEN];
    bool is_paired;
    int rssi;
} bt_device_info_t;

typedef struct {
    bt_device_info_t devices[MAX_BT_DEVICES];
    int count;
    bool discovery_active;
} bt_device_list_t;

/* Get current device list for GUI display */
bt_device_list_t* bt_get_device_list(void);

/* Start device discovery */
bool bt_start_discovery(void);

/* Stop device discovery */
bool bt_stop_discovery(void);

/* Connect to specific device by index in device list */
bool bt_connect_device(int device_index);

/* Clear discovered devices (keep paired devices) */
void bt_clear_discovered_devices(void);

/* Clear all devices from the device list (paired and discovered) */
void bt_clear_all_devices(void);

/* Disconnect from currently connected device */
void bt_disconnect_current_device(void);

/* Volume control functions */
void bt_volume_up(void);
void bt_volume_down(void);
int bt_get_current_volume(void);

#endif /* __BT_APP_CORE_H__ */