#include <cstdlib>
#include <iostream>
#include <string>
#include <vector>

#include "DetectorDescription/Core/interface/DDCompactView.h"
#include "DetectorDescription/Parser/interface/DDLParser.h"
#include "DetectorDescription/Parser/interface/DDLSAX2FileHandler.h"
#include "DetectorDescription/Parser/interface/FIPConfiguration.h"
#include "DetectorDescription/RegressionTest/interface/DDCompareTools.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/PluginManager/interface/PluginManager.h"
#include "FWCore/PluginManager/interface/standard.h"
#include "FWCore/Utilities/interface/Exception.h"
#include <boost/program_options.hpp>
#include <boost/exception/all.hpp>

int main(int argc, char* argv[]) {
  try {
    edmplugin::PluginManager::configure(edmplugin::standard::config());
  } catch (cms::Exception& e) {
    edm::LogInfo("DDCompareCPV") << "Attempting to configure the plugin manager. Exception message: " << e.what();
    return 1;
  }

  // Process the command line arguments
  std::string descString("DDCompareCPV");
  descString += " [options] configurationFileName1 configurationFileName2 Compares two DDCompactViews\n";
  descString += "Allowed options";
  boost::program_options::options_description desc(descString);
  desc.add_options()("help,h", "Print this help message")(
      "file1,f",
      boost::program_options::value<std::string>(),
      "XML configuration file name. "
      "Default is DetectorDescription/RegressionTest/test/configuration.xml")(
      "file2,g",
      boost::program_options::value<std::string>(),
      "XML configuration file name. "
      "Default is DetectorDescription/RegressionTest/test/configuration.xml")(
      "dist-tolerance,t",
      boost::program_options::value<std::string>(),
      "Value tolerance for distances (in mm). "
      "Default value 0.0004 (anything larger is an error)")("rot-tolerance,r",
                                                            boost::program_options::value<std::string>(),
                                                            "Value tolerance for rotation matrix elements. "
                                                            "Default value is 0.0004 (anything larger is an error)")(
      "spec-tolerance,s",
      boost::program_options::value<std::string>(),
      "Value tolerance for rotation matrix elements. "
      "Default value is 0.0004 (anything larger is an error) NOT USED YET")(
      "user-ns,u",
      "Use the namespaces in each file and do NOT use the filename as namespace. "
      "Default is to use the filename of each file in the configuration.xml file as a filename")(
      "comp-rot,c",
      "Use the rotation name when comparing rotations. "
      "Default is to use the matrix only and not the name when comparing DDRotations")(
      "continue-on-error,e",
      "Continue after an error in values. "
      "Default is to stop at the first error. NOT IMPLEMENTED")(
      "attempt-resync,a",
      "Continue after an error in graph position, attempt to resync. "
      "Default is to stop at the first mis-match of the graph. NOT IMPLEMENTED");

  boost::program_options::positional_options_description p;
  p.add("file1", 1);
  p.add("file2", 2);

  boost::program_options::variables_map vm;
  try {
    store(boost::program_options::command_line_parser(argc, argv).options(desc).positional(p).run(), vm);
    notify(vm);
  } catch (boost::program_options::error const& iException) {
    std::cerr << "Exception from command line processing: " << iException.what() << "\n";
    std::cerr << desc << std::endl;
    return 1;
  }
  if (vm.count("help")) {
    std::cout << desc << std::endl;
    return 0;
  }

  bool fullPath = false;
  std::string configfile("DetectorDescription/RegressionTest/test/configuration.xml");
  std::string configfile2("DetectorDescription/RegressionTest/test/configuration.xml");
  DDCompOptions ddco;
  bool usrns(false);
  try {
    if (vm.count("file1")) {
      configfile = vm["file1"].as<std::string>();
      if (vm.count("file2")) {
        configfile2 = vm["file2"].as<std::string>();
      }
    }
    if (vm.count("dist-tolerance"))
      ddco.distTol_ = vm["dist-tolerance"].as<double>();
    if (vm.count("rot-tolerance"))
      ddco.rotTol_ = vm["rot-tolerance"].as<double>();
    if (vm.count("spec-tolerance"))
      ddco.rotTol_ = vm["spec-tolerance"].as<double>();
    if (vm.count("user-ns"))
      usrns = true;
    if (vm.count("comp-rot"))
      ddco.compRotName_ = true;
    if (vm.count("continue-on-error"))
      ddco.contOnError_ = true;
    if (vm.count("attempt-resync"))
      ddco.attResync_ = true;
  } catch (boost::exception& e) {
    edm::LogInfo("DDCompareCPV") << "Attempting to parse the options. Exception message: "
                                 << boost::diagnostic_information(e);
    return 1;
  }

  std::ios_base::fmtflags originalFlags = std::cout.flags();

  std::cout << "Settings are: " << std::endl;
  std::cout << "Configuration file 1: " << configfile << std::endl;
  std::cout << "Configuration file 2: " << configfile2 << std::endl;
  std::cout << "Length/distance tolerance: " << ddco.distTol_ << std::endl;
  std::cout << "Rotation matrix element tolerance: " << ddco.rotTol_ << std::endl;
  std::cout << "SpecPar tolerance: " << ddco.specTol_ << std::endl;
  std::cout << "User controlled namespace (both file sets)? " << std::boolalpha << usrns << std::endl;
  std::cout << "Compare Rotation names? " << ddco.compRotName_ << std::endl;
  std::cout << "Continue on error (data mismatch)? " << ddco.contOnError_ << std::endl;
  std::cout << "Attempt resyncronization of disparate graphs? " << ddco.attResync_ << std::endl;

  DDCompactView cpv1(DDName("CompactView1"));
  DDLParser myP(cpv1);
  myP.getDDLSAX2FileHandler()->setUserNS(usrns);

  /* The configuration file tells the parser what to parse.
       The sequence of files to be parsed does not matter but for one exception:
       XML containing SpecPar-tags must be parsed AFTER all corresponding
       PosPart-tags were parsed. (Simply put all SpecPars-tags into seperate
       files and mention them at end of configuration.xml. Functional SW 
       will not suffer from this restriction).
    */

  // Use the File-In-Path configuration document provider.
  FIPConfiguration fp(cpv1);
  try {
    fp.readConfig(configfile, fullPath);
  } catch (cms::Exception& e) {
    edm::LogInfo("DDCompareCPV") << "Attempting to read config. Exception message: " << e.what();
    return 1;
  }

  std::cout << "FILE 1: " << configfile << std::endl;
  if (fp.getFileList().empty()) {
    std::cout << "FILE 1: configuration file has no DDD xml files in it!" << std::endl;
    exit(1);
  }
  int parserResult = myP.parse(fp);
  if (parserResult != 0) {
    std::cout << "FILE 1: problem encountered during parsing. exiting ... " << std::endl;
    exit(1);
  }
  cpv1.lockdown();

  DDCompactView cpv2(DDName("CompactView2"));
  DDLParser myP2(cpv2);
  myP2.getDDLSAX2FileHandler()->setUserNS(usrns);

  /* The configuration file tells the parser what to parse.
       The sequence of files to be parsed does not matter but for one exception:
       XML containing SpecPar-tags must be parsed AFTER all corresponding
       PosPart-tags were parsed. (Simply put all SpecPars-tags into seperate
       files and mention them at end of configuration.xml. Functional SW 
       will not suffer from this restriction).
    */

  // Use the File-In-Path configuration document provider.
  FIPConfiguration fp2(cpv2);
  fp2.readConfig(configfile2, fullPath);
  std::cout << "FILE 2: " << configfile2 << std::endl;
  if (fp2.getFileList().empty()) {
    std::cout << "FILE 2: configuration file has no DDD xml files in it!" << std::endl;
    exit(1);
  }
  int parserResult2 = myP2.parse(fp2);
  if (parserResult2 != 0) {
    std::cout << "FILE 2: problem encountered during parsing. exiting ... " << std::endl;
    exit(1);
  }
  cpv2.lockdown();

  std::cout << "Parsing completed. Start comparing." << std::endl;

  bool graphmatch = DDCompareCPV(cpv1, cpv2, ddco);

  if (graphmatch) {
    std::cout << "DDCompactView graphs match" << std::endl;
  } else {
    std::cout << "DDCompactView graphs do NOT match" << std::endl;
  }

  // Now set everything back to defaults
  std::cout.flags(originalFlags);

  return 0;
}