#include "CondFormats/SiStripObjects/interface/SiStripFedCabling.h"
#include "DataFormats/SiStripCommon/interface/SiStripConstants.h"
#include "DataFormats/SiStripCommon/interface/SiStripFedKey.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include <iostream>
#include <iomanip>

using namespace sistrip;

// -----------------------------------------------------------------------------
//
SiStripFedCabling::SiStripFedCabling(ConnsConstIterRange input)
    : feds_(), registry_(), connections_(), detected_(), undetected_() {
  LogTrace(mlCabling_) << "[SiStripFedCabling::" << __func__ << "]"
                       << " Constructing object from connection range...";
  buildFedCabling(input);
}

// -----------------------------------------------------------------------------
//
SiStripFedCabling::SiStripFedCabling(const SiStripFedCabling& input)
    : feds_(input.feds_),
      registry_(input.registry_),
      connections_(input.connections_),
      detected_(input.detected_),
      undetected_(input.undetected_) {
  LogTrace(mlCabling_) << "[SiStripFedCabling::" << __func__ << "]"
                       << " Copy constructing object...";
}

// -----------------------------------------------------------------------------
//
SiStripFedCabling::SiStripFedCabling() : feds_(), registry_(), connections_(), detected_(), undetected_() {
  LogTrace(mlCabling_) << "[SiStripFedCabling::" << __func__ << "]"
                       << " Default constructing object...";
}

// -----------------------------------------------------------------------------
//
SiStripFedCabling::~SiStripFedCabling() {
  LogTrace(mlCabling_) << "[SiStripFedCabling::" << __func__ << "]"
                       << " Destructing object...";
}

// -----------------------------------------------------------------------------
//
void SiStripFedCabling::buildFedCabling(ConnsConstIterRange input) {
  // Check input
  if (input.empty()) {
    edm::LogError(mlCabling_) << "[SiStripFedCabling::" << __func__ << "]"
                              << " Input vector of FedChannelConnections is of zero size!"
                              << " Unable to populate FED cabling object!";
    return;
  }

  std::stringstream ss;
  ss << "[SiStripFedCabling::" << __func__ << "]"
     << " Building FED cabling from " << input.size() << " connections...";
  LogTrace(mlCabling_) << ss.str();

  // Sort input vector by FED id and channel
  Conns temp(input.size());
  std::copy(input.begin(), input.end(), temp.begin());
  std::sort(temp.begin(), temp.end());

  // Strip FED ids
  uint16_t min_id = static_cast<uint16_t>(FEDNumbering::MINSiStripFEDID);
  uint16_t max_id = static_cast<uint16_t>(FEDNumbering::MAXSiStripFEDID);
  uint16_t nfeds = max_id - min_id + 1;

  // Initialise containers
  connections_.clear();
  connections_.reserve(96 * nfeds);
  registry_.clear();
  feds_.clear();
  registry_.resize(nfeds, ConnsRange::emptyPair());

  // Populate container
  ConnsIter ii = temp.begin();
  ConnsIter jj = temp.end();
  for (; ii != jj; ++ii) {
    uint16_t fed_id = ii->fedId();
    uint16_t fed_ch = ii->fedCh();
    uint16_t index = fed_id - min_id;

    if (fed_id < min_id || fed_id > max_id) {
      continue;
    }
    if (index >= registry_.size()) {
      continue;
    }
    if (!ii->isConnected()) {
      continue;
    }

    FedsConstIter iter = find(feds_.begin(), feds_.end(), fed_id);
    if (iter == feds_.end()) {
      feds_.push_back(fed_id);
    }

    if (registry_[index] == ConnsRange::emptyPair()) {
      ConnsPair conns_pair;
      conns_pair.first = std::distance(connections_.begin(), connections_.end());
      connections_.insert(connections_.end(), 96, FedChannelConnection());
      conns_pair.second = std::distance(connections_.begin(), connections_.end());
      registry_[index] = conns_pair;
    }

    ConnsRange conns = range(registry_[index]);
    ConnsConstIter iconn = conns.begin() + fed_ch;
    FedChannelConnection& conn = const_cast<FedChannelConnection&>(*iconn);
    conn = *ii;
  }
}

// -----------------------------------------------------------------------------
//
SiStripFedCabling::ConnsRange::ConnsRange(const Conns& c, ConnsPair p)
    : vector_(c.begin(), c.end()), range_(c.begin() + p.first, c.begin() + p.second) {
  if (p.first > p.second || p.first == sistrip::invalid32_ || p.second == sistrip::invalid32_ || p.first > c.size() ||
      p.second > c.size()) {
    range_ = ConnsConstIterRange(c.end(), c.end());
  }
}

// -----------------------------------------------------------------------------
//
SiStripFedCabling::ConnsRange::ConnsRange(const Conns& c) : vector_(c.begin(), c.end()), range_(c.end(), c.end()) { ; }

// -----------------------------------------------------------------------------
//
void SiStripFedCabling::ConnsRange::print(std::stringstream& ss) const {
  ss << "[SiStripFedCabling::ConnsRange::" << __func__ << "] Debug info:" << std::endl
     << " Vector  : " << std::endl
     << "  size   : " << vector_.size() << std::endl
     << "  begin  : " << std::hex << std::setfill('0') << std::setw(8) << &*vector_.begin() << std::dec << std::endl
     << "  end    : " << std::hex << std::setfill('0') << std::setw(8) << &*vector_.end() << std::dec << std::endl
     << " Range   : " << std::endl
     << "  size   : " << range_.size() << std::endl
     << "  begin  : " << std::hex << std::setfill('0') << std::setw(8) << &*range_.begin() << std::dec
     << " (dist=" << std::distance(vector_.begin(), range_.begin()) << ")" << std::endl
     << "  end    : " << std::hex << std::setfill('0') << std::setw(8) << &*range_.end() << std::dec
     << " (dist=" << std::distance(vector_.begin(), range_.end()) << ")" << std::endl
     << " Offsets : " << std::endl
     << "  first  : " << connsPair().first << std::endl
     << "  second : " << connsPair().second << std::endl;
}

// -----------------------------------------------------------------------------
//
std::ostream& operator<<(std::ostream& os, const SiStripFedCabling::ConnsRange& input) {
  std::stringstream ss;
  input.print(ss);
  os << ss.str();
  return os;
}

// -----------------------------------------------------------------------------
// Returns connection info for FE devices connected to given FED
SiStripFedCabling::ConnsConstIterRange SiStripFedCabling::fedConnections(uint16_t fed_id) const {
  uint16_t index = fed_id - FEDNumbering::MINSiStripFEDID;
  if (index < registry_.size()) {
    return range(registry_[index]).range();
  } else {
    return range(registry_[index]).invalid();
  }
}

// -----------------------------------------------------------------------------
// Returns connection info for FE devices connected to given FED id and channel
FedChannelConnection SiStripFedCabling::fedConnection(uint16_t fed_id, uint16_t fed_ch) const {
  ConnsConstIterRange conns = fedConnections(fed_id);
  if (!conns.empty() && conns.size() == 96 && fed_ch < 96) {
    return *(conns.begin() + fed_ch);
  } else {
    return FedChannelConnection();
  }
}

// -----------------------------------------------------------------------------
//
void SiStripFedCabling::printDebug(std::stringstream& ss, const TrackerTopology* /*trackerTopo*/) const {
  uint16_t total = 0;
  uint16_t nfeds = 0;
  uint16_t cntr = 0;

  if (feds_.empty()) {
    ss << "[SiStripFedCabling::" << __func__ << "]"
       << " No FEDs found! Unable to  print cabling map!";
    return;
  } else {
    ss << "[SiStripFedCabling::" << __func__ << "]"
       << " Printing cabling map for " << feds_.size() << " FEDs with following ids: ";
  }

  std::vector<uint16_t>::const_iterator ii = feds_.begin();
  std::vector<uint16_t>::const_iterator jj = feds_.end();
  for (; ii != jj; ++ii) {
    ss << *ii << " ";
  }
  ss << std::endl << std::endl;

  std::vector<uint16_t>::const_iterator ifed = feds_.begin();
  std::vector<uint16_t>::const_iterator jfed = feds_.end();
  for (; ifed != jfed; ++ifed) {
    uint16_t index = *ifed - FEDNumbering::MINSiStripFEDID;
    if (index < registry_.size()) {
      ConnsRange conns = range(registry_[index]);

      ss << " Printing cabling information for FED id " << *ifed << " (found " << conns.size()
         << " FedChannelConnection objects...)" << std::endl;

      uint16_t ichan = 0;
      uint16_t connected = 0;
      ConnsConstIter iconn = conns.begin();
      ConnsConstIter jconn = conns.end();
      for (; iconn != jconn; ++iconn) {
        if (iconn->fedId() != sistrip::invalid_) {
          connected++;
          ss << *iconn << std::endl;
        } else {
          ss << "  (FedId/Ch " << *ifed << "/" << ichan << ": unconnected channel...)" << std::endl;
          cntr++;
        }
        ichan++;
      }

      ss << " Found " << connected << " connected channels for FED id " << *ifed << std::endl << std::endl;
      if (connected) {
        nfeds++;
        total += connected;
      }
    }
  }

  float percent = (100. * cntr) / (96. * nfeds);
  percent = static_cast<uint16_t>(10. * percent);
  percent /= 10.;
  ss << " Found " << total << " APV pairs that are connected to a total of " << nfeds << " FEDs" << std::endl
     << " " << detected_.size() << " APV pairs have been detected, but are not connected" << std::endl
     << " " << undetected_.size() << " APV pairs are undetected (wrt DCU-DetId map)" << std::endl
     << " " << cntr << " FED channels out of a possible " << (96 * nfeds) << " (" << nfeds << " FEDs) are unconnected ("
     << percent << "%)" << std::endl
     << std::endl;
}

// -----------------------------------------------------------------------------
//
void SiStripFedCabling::terse(std::stringstream& ss) const {
  ss << "[SiStripFedCabling::" << __func__ << "]";

  if (feds_.empty()) {
    ss << " No FEDs found! Unable to print cabling map!";
    return;
  }

  ss << " Printing cabling map for " << feds_.size() << " FEDs: " << std::endl << std::endl;

  std::vector<uint16_t>::const_iterator ifed = feds_.begin();
  std::vector<uint16_t>::const_iterator jfed = feds_.end();
  for (; ifed != jfed; ++ifed) {
    uint16_t index = *ifed - FEDNumbering::MINSiStripFEDID;
    if (index < registry_.size()) {
      ConnsRange conns = range(registry_[index]);

      ss << " Printing cabling information for FED id " << *ifed << " (found " << conns.size()
         << " FedChannelConnection objects...)" << std::endl;

      uint16_t connected = 0;
      ConnsConstIter iconn = conns.begin();
      ConnsConstIter jconn = conns.end();
      for (; iconn != jconn; ++iconn) {
        if (iconn->fedId() != sistrip::invalid_) {
          connected++;
          iconn->terse(ss);
          ss << std::endl;
        }
      }

      ss << " Found " << connected << " connected channels for FED id " << *ifed << std::endl << std::endl;
    }
  }
}

// -----------------------------------------------------------------------------
//
void SiStripFedCabling::printSummary(std::stringstream& ss, const TrackerTopology* /*trackerTopo*/) const {
  ss << "[SiStripFedCabling::" << __func__ << "]";

  if (feds_.empty()) {
    ss << " No FEDs found!";
    return;
  }

  ss << " Found " << feds_.size() << " FEDs"
     << " with number of connected channels per front-end unit: " << std::endl
     << " FedId FeUnit1 FeUnit2 FeUnit3 FeUnit4 FeUnit5 FeUnit6 FeUnit7 FeUnit8 Total" << std::endl;

  uint16_t total = 0;
  uint16_t nfeds = 0;

  // iterate through fed ids
  std::vector<uint16_t>::const_iterator ii = feds_.begin();
  std::vector<uint16_t>::const_iterator jj = feds_.end();
  for (; ii != jj; ++ii) {
    // check number of connection objects
    uint16_t index = *ii - FEDNumbering::MINSiStripFEDID;
    if (index < registry_.size()) {
      ConnsRange conns = range(registry_[index]);

      if (conns.size() < 96) {
        edm::LogError(mlCabling_) << "[SiStripFedCabling::" << __func__ << "]"
                                  << " Unexpected size for FedChannelConnection vector! " << conns.size();
        return;
      }

      // count connected channels at level of fe unit
      std::vector<uint16_t> connected;
      connected.resize(8, 0);
      for (uint16_t ichan = 0; ichan < 96; ++ichan) {
        ConnsConstIter iconn = conns.begin() + ichan;
        if (iconn->fedId() < sistrip::valid_) {
          uint16_t unit = SiStripFedKey::feUnit(ichan);
          if (unit > 8) {
            continue;
          }
          connected[unit - 1]++;
        }
      }

      // increment counters
      uint16_t tot = 0;
      ss << " " << std::setw(5) << *ii;
      if (!connected.empty()) {
        nfeds++;
      }
      for (uint16_t unit = 0; unit < 8; ++unit) {
        ss << " " << std::setw(7) << connected[unit];
        if (!connected.empty()) {
          tot += connected[unit];
        }
      }
      ss << " " << std::setw(5) << tot << std::endl;
      total += tot;
    }
  }

  // print out
  float percent = (100. * total) / (96. * nfeds);
  percent = static_cast<uint16_t>(10. * percent);
  percent /= 10.;
  ss << " Found: " << std::endl
     << " " << nfeds << " out of " << feds_.size() << " FEDs with at least one connected channel " << std::endl
     << " " << feds_.size() - nfeds << " out of " << feds_.size() << " FEDs with no connected channels." << std::endl
     << " " << total << " connected channels in total" << std::endl
     << " " << detected_.size() << " APV pairs have been detected, but are not connected" << std::endl
     << " " << undetected_.size() << " APV pairs are undetected (wrt DCU-DetId map)" << std::endl
     << " " << percent << "% of FED channels are connected" << std::endl;
}