#include "usbd_core.h"
#include "usbd_hid.h"

#define USBD_VID           0x36b7
#define USBD_PID           0xffff
#define USBD_MAX_POWER     100
#define USBD_LANGID_STRING 1033

#define HID_DATA_BUFFER_SIZE 64

#define HID_INT_EP          0x81
#define HID_INT_EP_SIZE     HID_DATA_BUFFER_SIZE
#define HID_INT_EP_INTERVAL 10

#define HID_OUT_EP          0x02
#define HID_OUT_EP_SIZE     HID_DATA_BUFFER_SIZE
#define HID_OUT_EP_INTERVAL 10

#define USB_HID_CONFIG_DESC_SIZ       41
#define HID_CUSTOM_REPORT_DESC_SIZE   34

uint8_t databuffer[HID_DATA_BUFFER_SIZE] = {0x00};

static const uint8_t hid_descriptor[] = {
    USB_DEVICE_DESCRIPTOR_INIT(USB_2_0, 0x00, 0x00, 0x00, USBD_VID, USBD_PID, 0x0002, 0x01),
    USB_CONFIG_DESCRIPTOR_INIT(USB_HID_CONFIG_DESC_SIZ, 0x01, 0x01, USB_CONFIG_BUS_POWERED, USBD_MAX_POWER),

    /************** Descriptor of Custom interface ****************/
    /* 09 */
    0x09,                          /* bLength: Interface Descriptor size */
    USB_DESCRIPTOR_TYPE_INTERFACE, /* bDescriptorType: Interface descriptor type */
    0x00,                          /* bInterfaceNumber: Number of Interface */
    0x00,                          /* bAlternateSetting: Alternate setting */
    0x02,                          /* bNumEndpoints */
    0x03,                          /* bInterfaceClass: HID */
    0x00,                          /* bInterfaceSubClass : 1=BOOT, 0=no boot */
    0x00,                          /* nInterfaceProtocol : 0=none, 1=keyboard, 2=mouse */
    0,                             /* iInterface: Index of string descriptor */
    /******************** Descriptor of Custom HID ********************/
    /* 18 */
    0x09,                    /* bLength: HID Descriptor size */
    HID_DESCRIPTOR_TYPE_HID, /* bDescriptorType: HID */
    0x11,                    /* bcdHID: HID Class Spec release number */
    0x01,
    0x00,                          /* bCountryCode: Hardware target country */
    0x01,                          /* bNumDescriptors: Number of HID class descriptors to follow */
    0x22,                          /* bDescriptorType */
    HID_CUSTOM_REPORT_DESC_SIZE,   /* wItemLength: Total length of Report descriptor */
    0x00,
    /******************** Descriptor of Custom endpoint ********************/
    /* 27 */
    /* IN Endpoint (Send data to the host) */
    0x07,                         /* bLength: Endpoint Descriptor size */
    USB_DESCRIPTOR_TYPE_ENDPOINT, /* bDescriptorType: ENDPOINT*/
    HID_INT_EP,                   /* bEndpointAddress: Endpoint Address (IN) */
    0x03,                         /* bmAttributes: Interrupt endpoint */
    HID_INT_EP_SIZE,              /* wMaxPacketSize: 64 Byte max */
    0x00,    
    HID_INT_EP_INTERVAL,          /* bInterval: Polling Interval */

    /* OUT Endpoint (Receive data from the host) */
    0x07,                         /* bLength: Endpoint Descriptor size */
    USB_DESCRIPTOR_TYPE_ENDPOINT, /* bDescriptorType: ENDPOINT*/
    HID_OUT_EP,                   /* bEndpointAddress: Endpoint Address (OUT) */
    0x03,                         /* bmAttributes: Interrupt endpoint */
    HID_OUT_EP_SIZE,              /* wMaxPacketSize: 64 Byte max */
    0x00,    
    HID_OUT_EP_INTERVAL,          /* bInterval: Polling Interval */
    /* 41 */
    ///////////////////////////////////////
    /// string0 descriptor
    ///////////////////////////////////////
    USB_LANGID_INIT(USBD_LANGID_STRING),
    ///////////////////////////////////////
    /// string1 descriptor
    ///////////////////////////////////////
    0x0A,                       /* bLength */
    USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */
    'P', 0x00,                  /* wcChar0 */
    'U', 0x00,                  /* wcChar1 */
    'Y', 0x00,                  /* wcChar2 */
    'A', 0x00,                  /* wcChar3 */
    ///////////////////////////////////////
    /// string2 descriptor
    ///////////////////////////////////////
    0x1C,                       /* bLength */
    USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */
    'P', 0x00,                  /* wcChar0 */
    'U', 0x00,                  /* wcChar1 */
    'Y', 0x00,                  /* wcChar2 */
    'A', 0x00,                  /* wcChar3 */
    ' ', 0x00,                  /* wcChar4 */
    'H', 0x00,                  /* wcChar5 */
    'I', 0x00,                  /* wcChar6 */
    'D', 0x00,                  /* wcChar7 */
    ' ', 0x00,                  /* wcChar8 */
    'D', 0x00,                  /* wcChar9 */
    'E', 0x00,                  /* wcChar10 */
    'M', 0x00,                  /* wcChar11 */
    'O', 0x00,                  /* wcChar12 */
    ///////////////////////////////////////
    /// string3 descriptor
    ///////////////////////////////////////
    0x16,                       /* bLength */
    USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */
    '2', 0x00,                  /* wcChar0 */
    '0', 0x00,                  /* wcChar1 */
    '2', 0x00,                  /* wcChar2 */
    '2', 0x00,                  /* wcChar3 */
    '1', 0x00,                  /* wcChar4 */
    '2', 0x00,                  /* wcChar5 */
    '3', 0x00,                  /* wcChar6 */
    '4', 0x00,                  /* wcChar7 */
    '5', 0x00,                  /* wcChar8 */
    '6', 0x00,                  /* wcChar9 */
#ifdef CONFIG_USB_HS
    ///////////////////////////////////////
    /// device qualifier descriptor
    ///////////////////////////////////////
    0x0a,
    USB_DESCRIPTOR_TYPE_DEVICE_QUALIFIER,
    0x00,
    0x02,
    0x00,
    0x00,
    0x00,
    0x40,
    0x01,
    0x00,
#endif
    0x00
};

static const uint8_t hid_custom_report_desc[HID_CUSTOM_REPORT_DESC_SIZE] = {
    0x06, 0x00, 0xFF,  /* USAGE_PAGE (Vendor Defined 0xFF00) */
    0x09, 0x01,        /* USAGE (Vendor Usage 1) */
    0xA1, 0x01,        /* COLLECTION (Application) */

    /* Input report (device to host) */
    0x09, 0x02,        /* USAGE (Vendor Usage 2) */
    0x15, 0x00,        /* LOGICAL_MINIMUM (0) */
    0x26, 0xFF, 0x00,  /* LOGICAL_MAXIMUM (255) */
    0x75, 0x08,        /* REPORT_SIZE (8 bits) */
    0x95, HID_INT_EP_SIZE, /* REPORT_COUNT */
    0x81, 0x02,        /* INPUT (Data,Var,Abs) */

    /* Output report (host to device) */
    0x09, 0x03,        /* USAGE (Vendor Usage 3) */
    0x15, 0x00,        /* LOGICAL_MINIMUM (0) */
    0x26, 0xFF, 0x00,  /* LOGICAL_MAXIMUM (255) */
    0x75, 0x08,        /* REPORT_SIZE (8 bits) */
    0x95, HID_OUT_EP_SIZE, /* REPORT_COUNT */
    0x91, 0x02,        /* OUTPUT (Data,Var,Abs) */

    0xC0               /* END_COLLECTION */
};

static const uint8_t custom_hid_desc[9] = {
  
    0x09,                    /* bLength: HID Descriptor size */
    HID_DESCRIPTOR_TYPE_HID, /* bDescriptorType: HID */
    0x11,                    /* bcdHID: HID Class Spec release number */
    0x01,
    0x00,                          /* bCountryCode: Hardware target country */
    0x01,                          /* bNumDescriptors: Number of HID class descriptors to follow */
    0x22,                          /* bDescriptorType */
    HID_CUSTOM_REPORT_DESC_SIZE,   /* wItemLength: Total length of Report descriptor */
    0x00,  
};

void usbd_configure_done_callback(void)
{
    usbd_ep_start_read(HID_OUT_EP, databuffer, HID_OUT_EP_SIZE);
}

#define HID_STATE_IDLE 0
#define HID_STATE_BUSY 1

/*!< hid state ! Data can be sent only when state is idle  */
static volatile uint8_t hid_state = HID_STATE_IDLE;

void usbd_hid_int_callback(uint8_t ep, uint32_t nbytes)
{
    hid_state = HID_STATE_IDLE;
}

void usbd_hid_out_callback(uint8_t ep, uint32_t nbytes)
{
    usbd_ep_start_read(HID_OUT_EP, databuffer, HID_OUT_EP_SIZE);
}

static struct usbd_endpoint hid_in_ep = {
    .ep_cb = usbd_hid_int_callback,
    .ep_addr = HID_INT_EP
};

static struct usbd_endpoint hid_out_ep = {
    .ep_cb = usbd_hid_out_callback,
    .ep_addr = HID_OUT_EP
};

struct usbd_interface intf0;

void hid_custom_init(void)
{
    usbd_desc_register(hid_descriptor);
    usbd_add_interface(usbd_hid_init_intf(&intf0, custom_hid_desc, hid_custom_report_desc, HID_CUSTOM_REPORT_DESC_SIZE));
    usbd_add_endpoint(&hid_in_ep);
    usbd_add_endpoint(&hid_out_ep);
  
    usbd_initialize();
}

void hid_custom_test(void)
{
    int ret = usbd_ep_start_write(HID_INT_EP, databuffer, HID_INT_EP_SIZE);
    if (ret < 0) {
        return;
    }
    hid_state = HID_STATE_BUSY;
    while (hid_state == HID_STATE_BUSY) {
    }
}

uint8_t idle_speed;
void usbh_hid_set_idle(uint8_t intf, uint8_t report_id, uint8_t duration)
{
  idle_speed = duration;
}
   
uint8_t usbh_hid_get_idle(uint8_t intf, uint8_t report_id)
{
    return idle_speed;
}
