#ifndef CORE_USB_CLASS_CDC
#define CORE_USB_CLASS_CDC

#include "../usb_callback_event.h"

// CDC request codes
typedef enum {
    USB_CDC_SET_COMM_FEATURE = 0x2,
    USB_CDC_GET_COMM_FEATURE = 0x3,
    USB_CDC_CLEAR_COMM_FEATURE = 0x4,
    USB_CDC_SET_AUX_LINE_STATE = 0x10,
    USB_CDC_SET_HOOK_STATE = 0x11,
    USB_CDC_PULSE_SETUP = 0x12,
    USB_CDC_SEND_PULSE = 0x13,
    USB_CDC_SET_PULSE_TIME = 0x14,
    USB_CDC_RING_AUX_JACK = 0x15,
    USB_CDC_SET_LINE_CODING = 0x20,
    USB_CDC_GET_LINE_CODING = 0x21,
    USB_CDC_SET_CONTROL_LINE_STATE = 0x22,
    USB_CDC_SEND_BREAK = 0x23,
    USB_CDC_SET_RINGER_PARMS = 0x30,
    USB_CDC_GET_RINGER_PARMS = 0x31,
    USB_CDC_SET_OPERATION_PARMS = 0x32,
    USB_CDC_GET_OPERATION_PARMS = 0x33,
    USB_CDC_SET_LINE_PARMS = 0x34,
} USB_Cdc_RequestCodes;

// CDC line coding structure
typedef struct {
    uint32_t dwDTERate; // data terminal rate, bits per second
    uint8_t bCharFormat; // character format
    uint8_t bParityType; // parity type
    uint8_t bDataBits; // data bits
} USB_Cdc_LineCodingStruct;

// CDC control line state struct
typedef struct {
    uint16_t D; // settings word
} USB_Cdc_ControlLineStateStruct;

// ----------------

// endpoint assignments
typedef struct {
    uint8_t control_ep : 4; // control endpoint
    uint8_t data_ep : 4; // data endpoint
} USB_CdcAssignments;

typedef struct {
    USB_CdcAssignments ep_assignments; // endpoint assignments
    USB_Cdc_LineCodingStruct line_coding; // line coding
    USB_Cdc_ControlLineStateStruct control_line_state; // control line state
    uint16_t interrupt_data; // data sent though the next transfer on the notification element
    bool interrupt_pending; // interrupt data is valid and should be send in the next cycle
    bool initialized; // CDC is initialized
} USB_CdcState;

// ----------------

#define USB_CDC_DEFAULT_BITRATE (115200)
#define USB_CDC_DEFAULT_DATA_BITS (8)
#define USB_CDC_DEFAULT_PARITY_TYPE (0)
#define USB_CDC_DEFAULT_CHAR_FORMAT (0)

// ----------------

#define USB_CDC_PCKT_BUFSIZE (300)

// ----------------

void usb_cdc_init(const USB_CdcAssignments * as);
int usb_cdc_process_and_return(USB_CallbackEvent * cbevt);
void usb_cdc_write(const uint8_t * data, uint32_t size);

#endif /* CORE_USB_CLASS_CDC */