#include "include/board/board.h"
#include "fsl_gpio.h"
#include "usb_device_config.h"
#include "usb.h"
#include "usb_device.h"
#include "include/usb/usb_device_class.h"
#include "include/usb/usb_device_hid.h"
#include "include/usb/usb_device_ch9.h"
#include "usb_composite_device.h"
#include "include/lufa/HIDClassCommon.h"
#include "usb_interface_keyboard.h"
#include "usb_descriptor_configuration.h"

static usb_device_endpoint_struct_t UsbKeyboardEndpoints[USB_KEYBOARD_ENDPOINT_COUNT] = {{
    USB_KEYBOARD_ENDPOINT_INDEX | (USB_IN << USB_DESCRIPTOR_ENDPOINT_ADDRESS_DIRECTION_SHIFT),
    USB_ENDPOINT_INTERRUPT,
    USB_KEYBOARD_INTERRUPT_IN_PACKET_SIZE,
}};

static usb_device_interface_struct_t UsbKeyboardInterface[] = {{
    USB_INTERFACE_ALTERNATE_SETTING_NONE,
    {USB_KEYBOARD_ENDPOINT_COUNT, UsbKeyboardEndpoints},
    NULL,
}};

static usb_device_interfaces_struct_t UsbKeyboardInterfaces[USB_KEYBOARD_INTERFACE_COUNT] = {{
    USB_KEYBOARD_CLASS,
    USB_KEYBOARD_SUBCLASS,
    USB_KEYBOARD_PROTOCOL,
    USB_KEYBOARD_INTERFACE_INDEX,
    UsbKeyboardInterface,
    sizeof(UsbKeyboardInterface) / sizeof(usb_device_interfaces_struct_t),
}};

static usb_device_interface_list_t UsbKeyboardInterfaceList[USB_DEVICE_CONFIGURATION_COUNT] = {{
    USB_KEYBOARD_INTERFACE_COUNT,
    UsbKeyboardInterfaces,
}};

usb_device_class_struct_t UsbKeyboardClass = {
    UsbKeyboardInterfaceList,
    kUSB_DeviceClassTypeHid,
    USB_DEVICE_CONFIGURATION_COUNT,
};

static usb_keyboard_report_t UsbKeyboardReport;

static usb_status_t UsbKeyboardAction(void)
{
    UsbKeyboardReport.modifiers = 0;
    UsbKeyboardReport.reserved = 0;
    for (uint8_t scancode_idx=0; scancode_idx<USB_KEYBOARD_MAX_KEYS; scancode_idx++) {
        UsbKeyboardReport.scancodes[scancode_idx] = 0;
    }

    if (!GPIO_ReadPinInput(BOARD_SW3_GPIO, BOARD_SW3_GPIO_PIN)) {
        UsbKeyboardReport.scancodes[0] = HID_KEYBOARD_SC_A;
    }

    return USB_DeviceHidSend(UsbCompositeDevice.keyboardHandle, USB_KEYBOARD_ENDPOINT_INDEX,
                             (uint8_t*)&UsbKeyboardReport, USB_KEYBOARD_REPORT_LENGTH);
}

usb_status_t UsbKeyboardCallback(class_handle_t handle, uint32_t event, void *param)
{
    usb_status_t error = kStatus_USB_Error;

    switch (event) {
        case kUSB_DeviceHidEventSendResponse:
            if (UsbCompositeDevice.attach) {
                return UsbKeyboardAction();
            }
            break;
        case kUSB_DeviceHidEventGetReport:
        case kUSB_DeviceHidEventSetReport:
        case kUSB_DeviceHidEventRequestReportBuffer:
            error = kStatus_USB_InvalidRequest;
            break;
        case kUSB_DeviceHidEventGetIdle:
        case kUSB_DeviceHidEventGetProtocol:
        case kUSB_DeviceHidEventSetIdle:
        case kUSB_DeviceHidEventSetProtocol:
            break;
        default:
            break;
    }

    return error;
}

usb_status_t UsbKeyboardSetConfiguration(class_handle_t handle, uint8_t configuration)
{
    if (USB_COMPOSITE_CONFIGURATION_INDEX == configuration) {
        return UsbKeyboardAction();
    }
    return kStatus_USB_Error;
}

usb_status_t UsbKeyboardSetInterface(class_handle_t handle, uint8_t interface, uint8_t alternateSetting)
{
    if (USB_KEYBOARD_INTERFACE_INDEX == interface) {
        return UsbKeyboardAction();
    }
    return kStatus_USB_Error;
}