/*
 * This file is part of the libCEC(R) library.
 *
 * libCEC(R) is Copyright (C) 2011-2013 Pulse-Eight Limited.  All rights reserved.
 * libCEC(R) is an original work, containing original code.
 *
 * libCEC(R) is a trademark of Pulse-Eight Limited.
 *
 * IMX adpater port is Copyright (C) 2013 by Stephan Rafin
 *
 * You can redistribute this file and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 *
 */

#include "env.h"
#include "platform/util/timeutils.h"

#if defined(HAVE_IMX_API)
#include "IMXCECAdapterCommunication.h"

#include "platform/sockets/cdevsocket.h"
#include "CECTypeUtils.h"
#include "LibCEC.h"

#include "IMXCEC.h"

using namespace std;
using namespace CEC;

#define LIB_CEC m_callback->GetLib()


CIMXCECAdapterCommunication::CIMXCECAdapterCommunication(IAdapterCommunicationCallback *callback) :
    IAdapterCommunication(callback)
{
  CLockObject lock(m_mutex);

  m_iNextMessage = 0;
  m_logicalAddress = CECDEVICE_UNKNOWN;
  m_bLogicalAddressRegistered = false;
  m_bInitialised = false;
  m_dev = new CCDevSocket(CEC_IMX_PATH);
}

CIMXCECAdapterCommunication::~CIMXCECAdapterCommunication(void)
{
  Close();

  CLockObject lock(m_mutex);
  delete m_dev;
  m_dev = 0;
}

bool CIMXCECAdapterCommunication::IsOpen(void)
{
  return IsInitialised() && m_dev->IsOpen();
}

bool CIMXCECAdapterCommunication::Open(uint32_t iTimeoutMs, bool UNUSED(bSkipChecks), bool bStartListening)
{
  // CCDevSocket::Open() discards its timeout argument, so do the waiting here:
  // retry until it passes rather than giving up on the first failure. a zero
  // timeout leaves TimeLeft() at 0, ie. a single attempt
  CTimeout timeout(iTimeoutMs);
  bool bOpened = m_dev->Open(iTimeoutMs);
  while (!bOpened && timeout.TimeLeft() > 0)
  {
    std::this_thread::sleep_for(std::chrono::milliseconds(250));
    bOpened = m_dev->Open(iTimeoutMs);
  }

  if (bOpened)
  {
    if (!bStartListening || CreateThread()) {
      if (m_dev->Ioctl(HDMICEC_IOC_STARTDEVICE, NULL) == 0) {
         m_bInitialised = true;
         return true;
      }
      LIB_CEC->AddLog(CEC_LOG_ERROR, "%s: Unable to start device\n", __func__);
    }
    m_dev->Close();
  }

  return false;
}


void CIMXCECAdapterCommunication::Close(void)
{
  StopThread(0);

  CLockObject lock(m_mutex);
  if (!m_bInitialised) {
    return;
  }
  if (m_dev->Ioctl(HDMICEC_IOC_STOPDEVICE, NULL) != 0) {
    LIB_CEC->AddLog(CEC_LOG_ERROR, "%s: Unable to stop device\n", __func__);
  }
  m_dev->Close();
  m_bInitialised = false;
}


std::string CIMXCECAdapterCommunication::GetError(void) const
{
  std::string strError(m_strError);
  return strError;
}


cec_adapter_message_state CIMXCECAdapterCommunication::Write(
  const cec_command &data, bool &UNUSED(bRetry), uint8_t UNUSED(iLineTimeout), bool UNUSED(bIsReply))
{
  int error;
  unsigned char message[MAX_CEC_MESSAGE_LEN];

  int msg_len = data.Serialize(message, sizeof(message));
  if (msg_len < 0)
  {
    LIB_CEC->AddLog(CEC_LOG_ERROR, "%s: data size too large !", __func__);
    return ADAPTER_MESSAGE_STATE_ERROR;
  }

  if (m_dev->Write(message, msg_len) == msg_len)
    return ADAPTER_MESSAGE_STATE_SENT_ACKED;

  error = m_dev->GetErrorNumber();
  if (error == EIO)
    return ADAPTER_MESSAGE_STATE_SENT_NOT_ACKED;

  if (error != EAGAIN)
    LIB_CEC->AddLog(CEC_LOG_ERROR, "%s: write error %d", __func__, error);

  return ADAPTER_MESSAGE_STATE_ERROR;
}


uint16_t CIMXCECAdapterCommunication::GetFirmwareVersion(void)
{
  /* FIXME add ioctl ? */
  return 1;
}


cec_vendor_id CIMXCECAdapterCommunication::GetVendorId(void)
{
  return CEC_VENDOR_UNKNOWN;
}


uint16_t CIMXCECAdapterCommunication::GetPhysicalAddress(void)
{
  uint32_t info;
  uint16_t phy_addr;

  if (m_dev->Ioctl(HDMICEC_IOC_GETPHYADDRESS, &info) != 0)
  {
    LIB_CEC->AddLog(CEC_LOG_ERROR, "%s: HDMICEC_IOC_GETPHYADDRESS failed !", __func__);
    return CEC_INVALID_PHYSICAL_ADDRESS;
  }
  /* Rebuild 16 bit raw value from fsl 32 bits value */
  phy_addr = ((info & 0x0f) << 12) | (info & 0x0f00) |
             ((info & 0x0f0000) >> 12) | ((info & 0x0f000000) >> 24);

  return phy_addr;
}


cec_logical_addresses CIMXCECAdapterCommunication::GetLogicalAddresses(void) const
{
  cec_logical_addresses addresses;
  addresses.Clear();

  CLockObject lock(m_mutex);
  if ((m_logicalAddress & (CECDEVICE_UNKNOWN | CECDEVICE_UNREGISTERED)) == 0)
    addresses.Set(m_logicalAddress);

  return addresses;
}

void CIMXCECAdapterCommunication::HandleLogicalAddressLost(cec_logical_address UNUSED(oldAddress))
{
  UnregisterLogicalAddress();
}

bool CIMXCECAdapterCommunication::UnregisterLogicalAddress(void)
{
  CLockObject lock(m_mutex);
  if (!m_bLogicalAddressRegistered)
    return true;

  if (m_dev->Ioctl(HDMICEC_IOC_SETLOGICALADDRESS, (void *)CECDEVICE_BROADCAST) != 0)
  {
    LIB_CEC->AddLog(CEC_LOG_ERROR, "%s: HDMICEC_IOC_SETLOGICALADDRESS failed !", __func__);
    return false;
  }

  m_logicalAddress = CECDEVICE_UNKNOWN;
  m_bLogicalAddressRegistered = false;
  return true;
}

bool CIMXCECAdapterCommunication::RegisterLogicalAddress(const cec_logical_address address)
{
  CLockObject lock(m_mutex);

  if (m_logicalAddress == address && m_bLogicalAddressRegistered)
  {
    return true;
  }

  if (m_dev->Ioctl(HDMICEC_IOC_SETLOGICALADDRESS, (void *)address) != 0)
  {
    LIB_CEC->AddLog(CEC_LOG_ERROR, "%s: HDMICEC_IOC_SETLOGICALADDRESS failed !", __func__);
    return false;
  }

  m_logicalAddress = address;
  m_bLogicalAddressRegistered = true;
  return true;
}

bool CIMXCECAdapterCommunication::SetLogicalAddresses(const cec_logical_addresses &addresses)
{
  int log_addr = addresses.primary;

  return RegisterLogicalAddress((cec_logical_address)log_addr);
}

void *CIMXCECAdapterCommunication::Process(void)
{
  hdmi_cec_event event;
  int ret;

  cec_logical_address initiator, destination;

  while (!IsStopped())
  {
    ret = m_dev->Read((char *)&event, sizeof(event), 1000);
    if (ret > 0)
    {

      initiator = cec_logical_address(event.msg[0] >> 4);
      destination = cec_logical_address(event.msg[0] & 0x0f);

      //LIB_CEC->AddLog(CEC_LOG_DEBUG, "%s: Read data : type : %d initiator %d dest %d", __func__, event.event_type, initiator, destination);
      if (event.event_type == MESSAGE_TYPE_RECEIVE_SUCCESS)
      /* Message received */
      {
        cec_command cmd;

        // event.msg_len comes from the kernel; clamp it so a bogus length can
        // never make us read past the msg buffer
        int msg_len = event.msg_len;
        if (msg_len > (int)sizeof(event.msg))
          msg_len = (int)sizeof(event.msg);

        cec_command::Format(
          cmd, initiator, destination,
          ( msg_len > 1 ) ? cec_opcode(event.msg[1]) : CEC_OPCODE_NONE);

        for( int i = 2; i < msg_len; i++ )
          cmd.parameters.PushBack(event.msg[i]);

        if (!IsStopped())
          m_callback->OnCommandReceived(cmd);
      }

      if (event.event_type == MESSAGE_TYPE_CONNECTED)
      /* HDMI has just been reconnected - Notify  phy address*/
      {
        uint16_t iNewAddress = GetPhysicalAddress();
        m_callback->HandlePhysicalAddressChanged(iNewAddress);
      }
      /* We are not interested in other events */
    } /*else {
      LIB_CEC->AddLog(CEC_LOG_DEBUG, "%s: Read returned %d", __func__, ret);
    }*/

  }

  return 0;
}

#endif	// HAVE_IMX_API
