#pragma once

#include <stdbool.h>
#include <stdint.h>
#include "esp_err.h"
#include "sdkconfig.h"

#ifdef __cplusplus
extern "C" {
#endif

// USB Audio Status
typedef enum {
    USB_AUDIO_STATE_NOT_CONNECTED = 0,
    USB_AUDIO_STATE_CONNECTED,
    USB_AUDIO_STATE_CONFIGURED,
    USB_AUDIO_STATE_STREAMING,
    USB_AUDIO_STATE_ERROR
} usb_audio_state_t;

// USB Headset Button Events (HID)
typedef enum {
    USB_BUTTON_NONE = 0,
    USB_BUTTON_ANSWER,
    USB_BUTTON_HANGUP,
    USB_BUTTON_MUTE,
    USB_BUTTON_VOLUME_UP,
    USB_BUTTON_VOLUME_DOWN
} usb_button_event_t;

// USB Audio Info
typedef struct {
    uint16_t vendor_id;
    uint16_t product_id;
    char product_name[64];
    char manufacturer[64];
    uint32_t sample_rate;
    uint8_t channels;
    uint8_t bit_depth;
    bool has_microphone;
    bool has_speaker;
    bool has_hid;  // Hat HID-Tasten
} usb_audio_info_t;

// Callbacks
typedef void (*usb_audio_state_callback_t)(usb_audio_state_t state);
typedef void (*usb_audio_data_callback_t)(const uint8_t* data, size_t len);
typedef void (*usb_button_callback_t)(usb_button_event_t event);

/**
 * Initialisiert den USB Audio Host
 */
esp_err_t usb_audio_host_init(void);

/**
 * Deinitialisiert den USB Audio Host
 */
esp_err_t usb_audio_host_deinit(void);

/**
 * Gibt den aktuellen Status zurück
 */
usb_audio_state_t usb_audio_host_get_state(void);

/**
 * Prüft ob ein USB-Headset angeschlossen ist
 */
bool usb_audio_host_is_connected(void);

/**
 * Gibt Informationen über das angeschlossene Gerät zurück
 */
esp_err_t usb_audio_host_get_info(usb_audio_info_t* info);

/**
 * Startet Audio-Streaming
 */
esp_err_t usb_audio_host_start_stream(void);

/**
 * Stoppt Audio-Streaming
 */
esp_err_t usb_audio_host_stop_stream(void);

/**
 * Sendet Audio-Daten zum USB-Headset (Speaker)
 */
esp_err_t usb_audio_host_send(const uint8_t* data, size_t len);

/**
 * Setzt die Lautstärke (0-100)
 */
esp_err_t usb_audio_host_set_volume(uint8_t volume);

/**
 * Setzt Mute
 */
esp_err_t usb_audio_host_set_mute(bool mute);

/**
 * Registriert Callbacks
 */
void usb_audio_host_register_state_callback(usb_audio_state_callback_t callback);
void usb_audio_host_register_data_callback(usb_audio_data_callback_t callback);
void usb_audio_host_register_button_callback(usb_button_callback_t callback);

/**
 * Prüft ob USB Audio Host verfügbar ist (Hardware-Support)
 */
bool usb_audio_host_is_available(void);

#ifdef __cplusplus
}
#endif