#include "CondTools/Ecal/interface/EcalTBWeightsXMLTranslator.h"
#include <xercesc/dom/DOM.hpp>
#include <xercesc/parsers/XercesDOMParser.hpp>
#include "Utilities/Xerces/interface/Xerces.h"
#include "Utilities/Xerces/interface/XercesStrUtils.h"
#include <xercesc/util/XMLString.hpp>
#include <xercesc/sax/SAXException.hpp>
#include <xercesc/framework/LocalFileFormatTarget.hpp>
#include "CondTools/Ecal/interface/DOMHelperFunctions.h"
#include "CondTools/Ecal/interface/XMLTags.h"
#include <fstream>

using namespace xercesc;
using namespace std;
using namespace xuti;

// ouch ! I have to define here the << and >> operator !

std::ostream& operator<<(std::ostream& stream_, const EcalXtalGroupId& id_) { return stream_ << id_.id(); }

std::istream& operator>>(std::istream& stream_, EcalXtalGroupId& id_) {
  unsigned int id;
  stream_ >> id;
  id_ = EcalXtalGroupId(id);
  return stream_;
}

int EcalTBWeightsXMLTranslator::readXML(const std::string& filename, EcalCondHeader& header, EcalTBWeights& record) {
  cms::concurrency::xercesInitialize();

  XercesDOMParser* parser = new XercesDOMParser;
  parser->setValidationScheme(XercesDOMParser::Val_Never);
  parser->setDoNamespaces(false);
  parser->setDoSchema(false);

  parser->parse(filename.c_str());

  DOMDocument* xmlDoc = parser->getDocument();
  if (!xmlDoc) {
    std::cout << "EcalTBWeightsXMLTranslator::Error parsing document" << std::endl;
    return -1;
  }

  DOMElement* elementRoot = xmlDoc->getDocumentElement();
  xuti::readHeader(elementRoot, header);

  DOMNode* wnode = getChildNode(elementRoot, EcalTBWeight_tag);

  while (wnode) {
    DOMNode* gid_node = getChildNode(wnode, EcalXtalGroupId_tag);
    DOMNode* tdc_node = getChildNode(wnode, EcalTDCId_tag);
    DOMNode* ws_node = getChildNode(wnode, EcalWeightSet_tag);

    EcalXtalGroupId gid;
    EcalTBWeights::EcalTDCId tid;
    EcalWeightSet ws;

    GetNodeData(gid_node, gid);
    GetNodeData(tdc_node, tid);

    readWeightSet(ws_node, ws);

    record.setValue(gid, tid, ws);

    wnode = wnode->getNextSibling();

    while (wnode && wnode->getNodeType() != DOMNode::ELEMENT_NODE)
      wnode = wnode->getNextSibling();
  }

  cms::concurrency::xercesTerminate();

  return 0;
}

int EcalTBWeightsXMLTranslator::writeXML(const std::string& filename,
                                         const EcalCondHeader& header,
                                         const EcalTBWeights& record) {
  cms::concurrency::xercesInitialize();

  std::fstream fs(filename.c_str(), ios::out);
  fs << dumpXML(header, record);

  cms::concurrency::xercesTerminate();

  return 0;
}

void EcalTBWeightsXMLTranslator::readWeightSet(xercesc::DOMNode* parentNode, EcalWeightSet& ws) {
  // get the first cell node
  DOMNode* wgtBSnode = getChildNode(parentNode, wgtBeforeSwitch_tag);
  DOMNode* wgtASnode = getChildNode(parentNode, wgtAfterSwitch_tag);
  DOMNode* wgtChi2BSnode = getChildNode(parentNode, wgtChi2BeforeSwitch_tag);
  DOMNode* wgtChi2ASnode = getChildNode(parentNode, wgtChi2AfterSwitch_tag);

  DOMNode* rownode = getChildNode(wgtBSnode, row_tag);

  DOMElement* rowelement = nullptr;

  // loop on row nodes
  while (rownode) {
    rowelement = dynamic_cast<xercesc::DOMElement*>(rownode);

    std::string rowid_s = cms::xerces::toString(rowelement->getAttribute(cms::xerces::uStr(id_tag.c_str()).ptr()));

    std::stringstream rowid_ss(rowid_s);
    int rowid = 0;
    rowid_ss >> rowid;

    std::string weightrow = cms::xerces::toString(rownode->getTextContent());

    std::stringstream weightrow_s(weightrow);
    double weight = 0;
    int i = 0;
    while (weightrow_s >> weight) {
      ws.getWeightsBeforeGainSwitch()(rowid, i) = weight;
      i++;
    }

    // get next cell
    rownode = rownode->getNextSibling();

    while (rownode && rownode->getNodeType() != DOMNode::ELEMENT_NODE)
      rownode = rownode->getNextSibling();
  }

  rownode = getChildNode(wgtASnode, row_tag);

  // loop on row nodes
  while (rownode) {
    rowelement = dynamic_cast<xercesc::DOMElement*>(rownode);

    std::string rowid_s = cms::xerces::toString(rowelement->getAttribute(cms::xerces::uStr(id_tag.c_str()).ptr()));

    std::stringstream rowid_ss(rowid_s);
    int rowid = 0;
    rowid_ss >> rowid;

    std::string weightrow = cms::xerces::toString(rownode->getTextContent());

    std::stringstream weightrow_s(weightrow);
    double weight = 0;
    int i = 0;
    while (weightrow_s >> weight) {
      ws.getWeightsAfterGainSwitch()(rowid, i) = weight;
      i++;
    }

    // get next cell
    rownode = rownode->getNextSibling();

    while (rownode && rownode->getNodeType() != DOMNode::ELEMENT_NODE)
      rownode = rownode->getNextSibling();
  }

  rownode = getChildNode(wgtChi2BSnode, row_tag);

  // loop on row nodes
  while (rownode) {
    rowelement = dynamic_cast<xercesc::DOMElement*>(rownode);
    std::string rowid_s = cms::xerces::toString(rowelement->getAttribute(cms::xerces::uStr(id_tag.c_str()).ptr()));

    std::stringstream rowid_ss(rowid_s);
    int rowid = 0;
    rowid_ss >> rowid;

    std::string weightrow = cms::xerces::toString(rownode->getTextContent());

    std::stringstream weightrow_s(weightrow);
    double weight = 0;
    int i = 0;
    while (weightrow_s >> weight) {
      ws.getChi2WeightsBeforeGainSwitch()(rowid, i) = weight;
      i++;
    }

    // get next cell
    rownode = rownode->getNextSibling();

    while (rownode && rownode->getNodeType() != DOMNode::ELEMENT_NODE)
      rownode = rownode->getNextSibling();
  }

  rownode = getChildNode(wgtChi2ASnode, row_tag);

  // loop on row nodes
  while (rownode) {
    rowelement = dynamic_cast<xercesc::DOMElement*>(rownode);
    std::string rowid_s = cms::xerces::toString(rowelement->getAttribute(cms::xerces::uStr(id_tag.c_str()).ptr()));

    std::stringstream rowid_ss(rowid_s);
    int rowid = 0;
    rowid_ss >> rowid;

    std::string weightrow = cms::xerces::toString(rownode->getTextContent());

    std::stringstream weightrow_s(weightrow);
    double weight = 0;
    int i = 0;
    while (weightrow_s >> weight) {
      ws.getChi2WeightsAfterGainSwitch()(rowid, i) = weight;
      i++;
    }

    // get next cell
    rownode = rownode->getNextSibling();

    while (rownode && rownode->getNodeType() != DOMNode::ELEMENT_NODE)
      rownode = rownode->getNextSibling();
  }
}

void EcalTBWeightsXMLTranslator::writeWeightSet(xercesc::DOMNode* parentNode, const EcalWeightSet& ws) {
  xercesc::DOMDocument* doc = parentNode->getOwnerDocument();

  DOMElement* weightsetel = doc->createElement(cms::xerces::uStr(EcalWeightSet_tag.c_str()).ptr());
  parentNode->appendChild(weightsetel);

  DOMElement* wgtBS = doc->createElement(cms::xerces::uStr(wgtBeforeSwitch_tag.c_str()).ptr());
  weightsetel->appendChild(wgtBS);

  DOMElement* wgtAS = doc->createElement(cms::xerces::uStr(wgtAfterSwitch_tag.c_str()).ptr());
  weightsetel->appendChild(wgtAS);

  DOMElement* wgtChi2BS = doc->createElement(cms::xerces::uStr(wgtChi2BeforeSwitch_tag.c_str()).ptr());
  weightsetel->appendChild(wgtChi2BS);

  DOMElement* wgtChi2AS = doc->createElement(cms::xerces::uStr(wgtChi2AfterSwitch_tag.c_str()).ptr());
  weightsetel->appendChild(wgtChi2AS);

  writeWeightMatrix(wgtBS, ws.getWeightsBeforeGainSwitch());
  writeWeightMatrix(wgtAS, ws.getWeightsAfterGainSwitch());

  writeChi2WeightMatrix(wgtChi2BS, ws.getChi2WeightsBeforeGainSwitch());
  writeChi2WeightMatrix(wgtChi2AS, ws.getChi2WeightsBeforeGainSwitch());
}

void EcalTBWeightsXMLTranslator::writeWeightMatrix(xercesc::DOMNode* node,
                                                   const EcalWeightSet::EcalWeightMatrix& matrix) {
  DOMElement* row = nullptr;
  DOMAttr* rowid = nullptr;
  DOMText* rowvalue = nullptr;

  const int ncols = 10;
  const int nrows = 3;

  for (int i = 0; i < nrows; ++i) {
    row = node->getOwnerDocument()->createElement(cms::xerces::uStr(row_tag.c_str()).ptr());
    node->appendChild(row);

    stringstream value_s;
    value_s << i;

    rowid = node->getOwnerDocument()->createAttribute(cms::xerces::uStr(id_tag.c_str()).ptr());
    rowid->setValue(cms::xerces::uStr(value_s.str().c_str()).ptr());
    row->setAttributeNode(rowid);

    stringstream row_s;

    for (int k = 0; k < ncols; ++k)
      row_s << " " << matrix(i, k) << " ";

    rowvalue = node->getOwnerDocument()->createTextNode(cms::xerces::uStr(row_s.str().c_str()).ptr());
    row->appendChild(rowvalue);
  }  //for loop on col
}

void EcalTBWeightsXMLTranslator::writeChi2WeightMatrix(xercesc::DOMNode* node,
                                                       const EcalWeightSet::EcalChi2WeightMatrix& matrix) {
  DOMElement* row = nullptr;
  DOMAttr* rowid = nullptr;
  DOMText* rowvalue = nullptr;

  const int ncols = 10;
  const int nrows = 10;

  for (int i = 0; i < nrows; ++i) {
    row = node->getOwnerDocument()->createElement(cms::xerces::uStr(row_tag.c_str()).ptr());
    node->appendChild(row);

    stringstream value_s;
    value_s << i;

    rowid = node->getOwnerDocument()->createAttribute(cms::xerces::uStr(id_tag.c_str()).ptr());
    rowid->setValue(cms::xerces::uStr(value_s.str().c_str()).ptr());
    row->setAttributeNode(rowid);

    stringstream row_s;

    for (int k = 0; k < ncols; ++k)
      row_s << " " << matrix(i, k) << " ";

    rowvalue = node->getOwnerDocument()->createTextNode(cms::xerces::uStr(row_s.str().c_str()).ptr());
    row->appendChild(rowvalue);
  }  //for loop on col
}

std::string EcalTBWeightsXMLTranslator::dumpXML(const EcalCondHeader& header, const EcalTBWeights& record) {
  cms::concurrency::xercesInitialize();

  unique_ptr<DOMImplementation> impl(DOMImplementationRegistry::getDOMImplementation(cms::xerces::uStr("LS").ptr()));

  DOMLSSerializer* writer = impl->createLSSerializer();
  if (writer->getDomConfig()->canSetParameter(XMLUni::fgDOMWRTFormatPrettyPrint, true))
    writer->getDomConfig()->setParameter(XMLUni::fgDOMWRTFormatPrettyPrint, true);

  DOMDocumentType* doctype = impl->createDocumentType(cms::xerces::uStr("XML").ptr(), nullptr, nullptr);
  DOMDocument* doc = impl->createDocument(nullptr, cms::xerces::uStr(EcalTBWeights_tag.c_str()).ptr(), doctype);
  DOMElement* root = doc->getDocumentElement();

  xuti::writeHeader(root, header);

  const EcalTBWeights::EcalTBWeightMap& wmap = record.getMap();

  EcalTBWeights::EcalTBWeightMap::const_iterator it;
  for (it = wmap.begin(); it != wmap.end(); ++it) {
    DOMElement* tbweight = doc->createElement(cms::xerces::uStr(EcalTBWeight_tag.c_str()).ptr());
    root->appendChild(tbweight);

    EcalXtalGroupId gid = it->first.first;
    EcalTBWeights::EcalTDCId tid = it->first.second;
    EcalWeightSet ws = it->second;

    WriteNodeWithValue(tbweight, EcalXtalGroupId_tag, gid);
    WriteNodeWithValue(tbweight, EcalTDCId_tag, tid);
    writeWeightSet(tbweight, ws);

  }  //

  std::string dump = cms::xerces::toString(writer->writeToString(root));
  doc->release();
  doctype->release();
  writer->release();

  return dump;
}