#include "usb_hid.h"
#include <Arduino.h>
#include <HID.h>

// ── HID Report Descriptor: Keyboard + Consumer Control ───────────────────────
// Vendor-Kommunikation läuft über CVendorHID (eigenes PluggableUSBModule).

static const uint8_t k_hid_descriptor[] = {

    // ── Report ID 1: Keyboard ─────────────────────────────────────────────────
    0x05, 0x01,         // Usage Page (Generic Desktop)
    0x09, 0x06,         // Usage (Keyboard)
    0xA1, 0x01,         // Collection (Application)
    0x85, HID_REPORT_ID_KEYBOARD,
    0x05, 0x07,         //   Usage Page (Key Codes)
    0x19, 0xE0,         //   Usage Minimum (Left Ctrl)
    0x29, 0xE7,         //   Usage Maximum (Right GUI)
    0x15, 0x00,         //   Logical Minimum (0)
    0x25, 0x01,         //   Logical Maximum (1)
    0x75, 0x01,         //   Report Size (1 Bit)
    0x95, 0x08,         //   Report Count (8)
    0x81, 0x02,         //   Input (Data, Variable, Absolute)
    0x95, 0x01,         //   Report Count (1)
    0x75, 0x08,         //   Report Size (8 Bit)
    0x81, 0x01,         //   Input (Constant)
    0x95, 0x06,         //   Report Count (6)
    0x75, 0x08,         //   Report Size (8 Bit)
    0x15, 0x00,         //   Logical Minimum (0)
    0x25, 0x65,         //   Logical Maximum (101)
    0x05, 0x07,         //   Usage Page (Key Codes)
    0x19, 0x00,         //   Usage Minimum (0)
    0x29, 0x65,         //   Usage Maximum (101)
    0x81, 0x00,         //   Input (Data, Array)
    0xC0,               // End Collection

    // ── Report ID 2: Consumer Control ─────────────────────────────────────────
    0x05, 0x0C,         // Usage Page (Consumer Devices)
    0x09, 0x01,         // Usage (Consumer Control)
    0xA1, 0x01,         // Collection (Application)
    0x85, HID_REPORT_ID_CONSUMER,
    0x15, 0x00,         //   Logical Minimum (0)
    0x26, 0xFF, 0x03,   //   Logical Maximum (1023)
    0x19, 0x00,         //   Usage Minimum (0)
    0x2A, 0xFF, 0x03,   //   Usage Maximum (1023)
    0x75, 0x10,         //   Report Size (16 Bit)
    0x95, 0x01,         //   Report Count (1)
    0x81, 0x00,         //   Input (Data, Array)
    0xC0,               // End Collection
};

namespace {
    struct HIDRegistrar {
        HIDSubDescriptor node;
        HIDRegistrar() : node(k_hid_descriptor, sizeof(k_hid_descriptor)) {
            HID().AppendDescriptor(&node);
        }
    } s_hid_registrar;
}

struct KeyboardReport {
    uint8_t modifier;
    uint8_t reserved;
    uint8_t keycodes[6];
};

struct ConsumerReport {
    uint16_t usage;
};

void usb_hid_init() {}

void usb_hid_send_key(uint8_t keycode, uint8_t modifier)
{
    KeyboardReport report = {};
    report.modifier    = modifier;
    report.keycodes[0] = keycode;
    HID().SendReport(HID_REPORT_ID_KEYBOARD, &report, sizeof(report));
}

void usb_hid_release_key()
{
    KeyboardReport report = {};
    HID().SendReport(HID_REPORT_ID_KEYBOARD, &report, sizeof(report));
}

void usb_hid_send_consumer(uint16_t usage)
{
    ConsumerReport report = { usage };
    HID().SendReport(HID_REPORT_ID_CONSUMER, &report, sizeof(report));
}

void usb_hid_release_consumer()
{
    ConsumerReport report = { 0 };
    HID().SendReport(HID_REPORT_ID_CONSUMER, &report, sizeof(report));
}