/* Copyright (C) 2012 Kristian Lauszus, TKJ Electronics. All rights reserved.

 This software may be distributed and modified under the terms of the GNU
 General Public License version 2 (GPL2) as published by the Free Software
 Foundation and appearing in the file GPL2.TXT included in the packaging of
 this file. Please note that GPL2 Section 2[b] requires that all works based
 on this software must also be made publicly available under the terms of
 the GPL2 ("Copyleft").

 Contact information
 -------------------

 Kristian Lauszus, TKJ Electronics
 Web      :  http://www.tkjelectronics.com
 e-mail   :  kristianl@tkjelectronics.com
 */

#include "XBOXUSB.h"
// To enable serial debugging see "settings.h"
//#define EXTRADEBUG // Uncomment to get even more debugging data
//#define PRINTREPORT // Uncomment to print the report send by the Xbox 360 Controller

XBOXUSB::XBOXUSB(USB *p) :
pUsb(p), // pointer to USB class instance - mandatory
bAddress(0), // device address - mandatory
bPollEnable(false) { // don't start polling before dongle is connected
        for(uint8_t i = 0; i < XBOX_MAX_ENDPOINTS; i++) {
                epInfo[i].epAddr = 0;
                epInfo[i].maxPktSize = (i) ? 0 : 8;
                epInfo[i].epAttribs = 0;
                epInfo[i].bmNakPower = (i) ? USB_NAK_NOWAIT : USB_NAK_MAX_POWER;
        }

        if(pUsb) // register in USB subsystem
                pUsb->RegisterDeviceClass(this); //set devConfig[] entry
}

uint8_t XBOXUSB::Init(uint8_t parent, uint8_t port, bool lowspeed) {
        uint8_t buf[sizeof (USB_DEVICE_DESCRIPTOR)];
        USB_DEVICE_DESCRIPTOR * udd = reinterpret_cast<USB_DEVICE_DESCRIPTOR*>(buf);
        uint8_t rcode;
        UsbDevice *p = NULL;
        EpInfo *oldep_ptr = NULL;
        uint16_t PID;
        uint16_t VID;

        // get memory address of USB device address pool
        AddressPool &addrPool = pUsb->GetAddressPool();
#ifdef EXTRADEBUG
        Notify(PSTR("\r\nXBOXUSB Init"), 0x80);
#endif
        // check if address has already been assigned to an instance
        if(bAddress) {
#ifdef DEBUG_USB_HOST
                Notify(PSTR("\r\nAddress in use"), 0x80);
#endif
                return USB_ERROR_CLASS_INSTANCE_ALREADY_IN_USE;
        }

        // Get pointer to pseudo device with address 0 assigned
        p = addrPool.GetUsbDevicePtr(0);

        if(!p) {
#ifdef DEBUG_USB_HOST
                Notify(PSTR("\r\nAddress not found"), 0x80);
#endif
                return USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL;
        }

        if(!p->epinfo) {
#ifdef DEBUG_USB_HOST
                Notify(PSTR("\r\nepinfo is null"), 0x80);
#endif
                return USB_ERROR_EPINFO_IS_NULL;
        }

        // Save old pointer to EP_RECORD of address 0
        oldep_ptr = p->epinfo;

        // Temporary assign new pointer to epInfo to p->epinfo in order to avoid toggle inconsistence
        p->epinfo = epInfo;

        p->lowspeed = lowspeed;

        // Get device descriptor
        rcode = pUsb->getDevDescr(0, 0, sizeof (USB_DEVICE_DESCRIPTOR), (uint8_t*)buf); // Get device descriptor - addr, ep, nbytes, data
        // Restore p->epinfo
        p->epinfo = oldep_ptr;

        if(rcode)
                goto FailGetDevDescr;

        VID = udd->idVendor;
        PID = udd->idProduct;

        if(VID != XBOX_VID && VID != MADCATZ_VID && VID != JOYTECH_VID && VID != GAMESTOP_VID) // Check VID
                goto FailUnknownDevice;
        if(PID == XBOX_WIRELESS_PID) {
#ifdef DEBUG_USB_HOST
                Notify(PSTR("\r\nYou have plugged in a wireless Xbox 360 controller - it doesn't support USB communication"), 0x80);
#endif
                goto FailUnknownDevice;
        } else if(PID == XBOX_WIRELESS_RECEIVER_PID || PID == XBOX_WIRELESS_RECEIVER_THIRD_PARTY_PID) {
#ifdef DEBUG_USB_HOST
                Notify(PSTR("\r\nThis library only supports Xbox 360 controllers via USB"), 0x80);
#endif
                goto FailUnknownDevice;
        } else if(PID != XBOX_WIRED_PID && PID != GAMESTOP_WIRED_PID) // Check PID
                goto FailUnknownDevice;

        // Allocate new address according to device class
        bAddress = addrPool.AllocAddress(parent, false, port);

        if(!bAddress)
                return USB_ERROR_OUT_OF_ADDRESS_SPACE_IN_POOL;

        // Extract Max Packet Size from device descriptor
        epInfo[0].maxPktSize = udd->bMaxPacketSize0;

        // Assign new address to the device
        rcode = pUsb->setAddr(0, 0, bAddress);
        if(rcode) {
                p->lowspeed = false;
                addrPool.FreeAddress(bAddress);
                bAddress = 0;
#ifdef DEBUG_USB_HOST
                Notify(PSTR("\r\nsetAddr: "), 0x80);
                D_PrintHex<uint8_t > (rcode, 0x80);
#endif
                return rcode;
        }
#ifdef EXTRADEBUG
        Notify(PSTR("\r\nAddr: "), 0x80);
        D_PrintHex<uint8_t > (bAddress, 0x80);
#endif
        //delay(300); // Spec says you should wait at least 200ms

        p->lowspeed = false;

        //get pointer to assigned address record
        p = addrPool.GetUsbDevicePtr(bAddress);
        if(!p)
                return USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL;

        p->lowspeed = lowspeed;

        // Assign epInfo to epinfo pointer - only EP0 is known
        rcode = pUsb->setEpInfoEntry(bAddress, 1, epInfo);
        if(rcode)
                goto FailSetDevTblEntry;

        /* The application will work in reduced host mode, so we can save program and data
           memory space. After verifying the VID we will use known values for the
           configuration values for device, interface, endpoints and HID for the XBOX360 Controllers */

        /* Initialize data structures for endpoints of device */
        epInfo[ XBOX_INPUT_PIPE ].epAddr = 0x01; // XBOX 360 report endpoint
        epInfo[ XBOX_INPUT_PIPE ].epAttribs = EP_INTERRUPT;
        epInfo[ XBOX_INPUT_PIPE ].bmNakPower = USB_NAK_NOWAIT; // Only poll once for interrupt endpoints
        epInfo[ XBOX_INPUT_PIPE ].maxPktSize = EP_MAXPKTSIZE;
        epInfo[ XBOX_INPUT_PIPE ].bmSndToggle = 0;
        epInfo[ XBOX_INPUT_PIPE ].bmRcvToggle = 0;
        epInfo[ XBOX_OUTPUT_PIPE ].epAddr = 0x02; // XBOX 360 output endpoint
        epInfo[ XBOX_OUTPUT_PIPE ].epAttribs = EP_INTERRUPT;
        epInfo[ XBOX_OUTPUT_PIPE ].bmNakPower = USB_NAK_NOWAIT; // Only poll once for interrupt endpoints
        epInfo[ XBOX_OUTPUT_PIPE ].maxPktSize = EP_MAXPKTSIZE;
        epInfo[ XBOX_OUTPUT_PIPE ].bmSndToggle = 0;
        epInfo[ XBOX_OUTPUT_PIPE ].bmRcvToggle = 0;

        rcode = pUsb->setEpInfoEntry(bAddress, 3, epInfo);
        if(rcode)
                goto FailSetDevTblEntry;

        delay(200); // Give time for address change

        rcode = pUsb->setConf(bAddress, epInfo[ XBOX_CONTROL_PIPE ].epAddr, 1);
        if(rcode)
                goto FailSetConfDescr;

#ifdef DEBUG_USB_HOST
        Notify(PSTR("\r\nXbox 360 Controller Connected\r\n"), 0x80);
#endif
        onInit();
        Xbox360Connected = true;
        bPollEnable = true;
        return 0; // Successful configuration

        /* Diagnostic messages */
FailGetDevDescr:
#ifdef DEBUG_USB_HOST
        NotifyFailGetDevDescr();
        goto Fail;
#endif

FailSetDevTblEntry:
#ifdef DEBUG_USB_HOST
        NotifyFailSetDevTblEntry();
        goto Fail;
#endif

FailSetConfDescr:
#ifdef DEBUG_USB_HOST
        NotifyFailSetConfDescr();
#endif
        goto Fail;

FailUnknownDevice:
#ifdef DEBUG_USB_HOST
        NotifyFailUnknownDevice(VID, PID);
#endif
        rcode = USB_DEV_CONFIG_ERROR_DEVICE_NOT_SUPPORTED;

Fail:
#ifdef DEBUG_USB_HOST
        Notify(PSTR("\r\nXbox 360 Init Failed, error code: "), 0x80);
        NotifyFail(rcode);
#endif
        Release();
        return rcode;
}

/* Performs a cleanup after failed Init() attempt */
uint8_t XBOXUSB::Release() {
        Xbox360Connected = false;
        pUsb->GetAddressPool().FreeAddress(bAddress);
        bAddress = 0;
        bPollEnable = false;
        return 0;
}

uint8_t XBOXUSB::Poll() {
        if(!bPollEnable)
                return 0;
        uint16_t BUFFER_SIZE = EP_MAXPKTSIZE;
        pUsb->inTransfer(bAddress, epInfo[ XBOX_INPUT_PIPE ].epAddr, &BUFFER_SIZE, readBuf); // input on endpoint 1
        readReport();
#ifdef PRINTREPORT
        printReport(); // Uncomment "#define PRINTREPORT" to print the report send by the Xbox 360 Controller
#endif
        return 0;
}

void XBOXUSB::readReport() {
        if(readBuf == NULL)
                return;
        if(readBuf[0] != 0x00 || readBuf[1] != 0x14) { // Check if it's the correct report - the controller also sends different status reports
                return;
        }

        ButtonState = (uint32_t)(readBuf[5] | ((uint16_t)readBuf[4] << 8) | ((uint32_t)readBuf[3] << 16) | ((uint32_t)readBuf[2] << 24));

        hatValue[LeftHatX] = (int16_t)(((uint16_t)readBuf[7] << 8) | readBuf[6]);
        hatValue[LeftHatY] = (int16_t)(((uint16_t)readBuf[9] << 8) | readBuf[8]);
        hatValue[RightHatX] = (int16_t)(((uint16_t)readBuf[11] << 8) | readBuf[10]);
        hatValue[RightHatY] = (int16_t)(((uint16_t)readBuf[13] << 8) | readBuf[12]);

        //Notify(PSTR("\r\nButtonState"), 0x80);
        //PrintHex<uint32_t>(ButtonState, 0x80);

        if(ButtonState != OldButtonState) {
                ButtonClickState = (ButtonState >> 16) & ((~OldButtonState) >> 16); // Update click state variable, but don't include the two trigger buttons L2 and R2
                if(((uint8_t)OldButtonState) == 0 && ((uint8_t)ButtonState) != 0) // The L2 and R2 buttons are special as they are analog buttons
                        R2Clicked = true;
                if((uint8_t)(OldButtonState >> 8) == 0 && (uint8_t)(ButtonState >> 8) != 0)
                        L2Clicked = true;
                OldButtonState = ButtonState;
        }
}

void XBOXUSB::printReport() { //Uncomment "#define PRINTREPORT" to print the report send by the Xbox 360 Controller
#ifdef PRINTREPORT
        if(readBuf == NULL)
                return;
        for(uint8_t i = 0; i < XBOX_REPORT_BUFFER_SIZE; i++) {
                D_PrintHex<uint8_t > (readBuf[i], 0x80);
                Notify(PSTR(" "), 0x80);
        }
        Notify(PSTR("\r\n"), 0x80);
#endif
}

uint8_t XBOXUSB::getButtonPress(Button b) {
        if(b == L2) // These are analog buttons
                return (uint8_t)(ButtonState >> 8);
        else if(b == R2)
                return (uint8_t)ButtonState;
        return (bool)(ButtonState & ((uint32_t)pgm_read_word(&XBOXBUTTONS[(uint8_t)b]) << 16));
}

bool XBOXUSB::getButtonClick(Button b) {
        if(b == L2) {
                if(L2Clicked) {
                        L2Clicked = false;
                        return true;
                }
                return false;
        } else if(b == R2) {
                if(R2Clicked) {
                        R2Clicked = false;
                        return true;
                }
                return false;
        }
        uint16_t button = pgm_read_word(&XBOXBUTTONS[(uint8_t)b]);
        bool click = (ButtonClickState & button);
        ButtonClickState &= ~button; // clear "click" event
        return click;
}

int16_t XBOXUSB::getAnalogHat(AnalogHat a) {
        return hatValue[a];
}

/* Xbox Controller commands */
void XBOXUSB::XboxCommand(uint8_t* data, uint16_t nbytes) {
        //bmRequest = Host to device (0x00) | Class (0x20) | Interface (0x01) = 0x21, bRequest = Set Report (0x09), Report ID (0x00), Report Type (Output 0x02), interface (0x00), datalength, datalength, data)
        pUsb->ctrlReq(bAddress, epInfo[XBOX_CONTROL_PIPE].epAddr, bmREQ_HID_OUT, HID_REQUEST_SET_REPORT, 0x00, 0x02, 0x00, nbytes, nbytes, data, NULL);
}

void XBOXUSB::setLedRaw(uint8_t value) {
        writeBuf[0] = 0x01;
        writeBuf[1] = 0x03;
        writeBuf[2] = value;

        XboxCommand(writeBuf, 3);
}

void XBOXUSB::setLedOn(LED led) {
        if(led != ALL) // All LEDs can't be on a the same time
                setLedRaw((pgm_read_byte(&XBOXLEDS[(uint8_t)led])) + 4);
}

void XBOXUSB::setLedBlink(LED led) {
        setLedRaw(pgm_read_byte(&XBOXLEDS[(uint8_t)led]));
}

void XBOXUSB::setLedMode(LEDMode ledMode) { // This function is used to do some speciel LED stuff the controller supports
        setLedRaw((uint8_t)ledMode);
}

void XBOXUSB::setRumbleOn(uint8_t lValue, uint8_t rValue) {
        writeBuf[0] = 0x00;
        writeBuf[1] = 0x08;
        writeBuf[2] = 0x00;
        writeBuf[3] = lValue; // big weight
        writeBuf[4] = rValue; // small weight
        writeBuf[5] = 0x00;
        writeBuf[6] = 0x00;
        writeBuf[7] = 0x00;

        XboxCommand(writeBuf, 8);
}

void XBOXUSB::onInit() {
        if(pFuncOnInit)
                pFuncOnInit(); // Call the user function
        else
                setLedOn(LED1);
}