#include "cmStandardIncludes.h"
#include "cmSystemTools.h"
#include "cmParsePHPCoverage.h"
#include <cmsys/Directory.hxx>
#include <cmsys/FStream.hxx>

/*
  To setup coverage for php.

  - edit php.ini to add auto prepend and append php files from phpunit
  auto_prepend_file =
  auto_append_file =
  - run the tests
  - run this program on all the files in c:/tmp

*/

cmParsePHPCoverage::cmParsePHPCoverage(cmCTestCoverageHandlerContainer& cont,
    cmCTest* ctest)
    :Coverage(cont), CTest(ctest)
{
}

bool cmParsePHPCoverage::ReadUntil(std::istream& in, char until)
{
  char c = 0;
  while(in.get(c) && c != until)
    {
    }
  if(c != until)
    {
    return false;
    }
  return true;
}
bool cmParsePHPCoverage::ReadCoverageArray(std::istream& in,
                                           std::string const& fileName)
{
  cmCTestCoverageHandlerContainer::SingleFileCoverageVector& coverageVector
    = this->Coverage.TotalCoverage[fileName];

  char c;
  char buf[4];
  in.read(buf, 3);
  buf[3] = 0;
  if(strcmp(buf, ";a:") != 0)
    {
    cmCTestLog(this->CTest, ERROR_MESSAGE,
               "failed to read start of coverage array, found : "
               << buf << "\n");
    return false;
    }
  int size = 0;
  if(!this->ReadInt(in, size))
    {
    cmCTestLog(this->CTest, ERROR_MESSAGE,
               "failed to read size ");
    return false;
    }
  if(!in.get(c) && c == '{')
    {
    cmCTestLog(this->CTest, ERROR_MESSAGE,
               "failed to read open {\n");
    return false;
    }
  for(int i =0; i < size; i++)
    {
    this->ReadUntil(in, ':');
    int line = 0;
    this->ReadInt(in, line);
    // ok xdebug may have a bug here
    // it seems to be 1 based but often times
    // seems to have a 0'th line.
    line--;
    if(line < 0)
      {
      line = 0;
      }
    this->ReadUntil(in, ':');
    int value = 0;
    this->ReadInt(in, value);
    // make sure the vector is the right size and is
    // initialized with -1 for each line
    while(coverageVector.size() <= static_cast<size_t>(line) )
      {
      coverageVector.push_back(-1);
      }
    // if value is less than 0, set it to zero
    // TODO figure out the difference between
    // -1 and -2 in xdebug coverage??  For now
    // assume less than 0 is just not covered
    // CDash expects -1 for non executable code (like comments)
    // and 0 for uncovered code, and a positive value
    // for number of times a line was executed
    if(value < 0)
      {
      value = 0;
      }
    // if unset then set it to value
    if(coverageVector[line] == -1)
      {
      coverageVector[line] = value;
      }
    // otherwise increment by value
    else
      {
      coverageVector[line] += value;
      }
    }
  return true;
}

bool cmParsePHPCoverage::ReadInt(std::istream& in, int& v)
{
  std::string s;
  char c = 0;
  while(in.get(c) && c != ':' && c != ';')
    {
    s += c;
    }
  v = atoi(s.c_str());
  return true;
}

bool cmParsePHPCoverage::ReadArraySize(std::istream& in, int& size)
{
  char c = 0;
  in.get(c);
  if(c != 'a')
    {
    return false;
    }
  if(in.get(c) && c == ':')
    {
    if(this->ReadInt(in, size))
      {
      return true;
      }
    }
  return false;
}

bool cmParsePHPCoverage::ReadFileInformation(std::istream& in)
{
  char buf[4];
  in.read(buf, 2);
  buf[2] = 0;
  if(strcmp(buf, "s:") != 0)
    {
    cmCTestLog(this->CTest, ERROR_MESSAGE,
               "failed to read start of file info found: [" << buf << "]\n");
    return false;
    }
  char c;
  int size = 0;
  if(this->ReadInt(in, size))
    {
    size++; // add one for null termination
    char* s = new char[size+1];
    // read open quote
    if(in.get(c) && c != '"')
      {
      delete[] s;
      return false;
      }
    // read the string data
    in.read(s, size-1);
    s[size-1] = 0;
    std::string fileName = s;
    delete [] s;
    // read close quote
    if(in.get(c) && c != '"')
      {
      cmCTestLog(this->CTest, ERROR_MESSAGE,
                 "failed to read close quote\n"
                 << "read [" << c << "]\n");
      return false;
      }
    if(!this->ReadCoverageArray(in, fileName) )
      {
      cmCTestLog(this->CTest, ERROR_MESSAGE,
                 "failed to read coverage array for file: "
                 << fileName << "\n");
      return false;
      }
    return true;
    }
  return false;
}


bool cmParsePHPCoverage::ReadPHPData(const char* file)
{
  cmsys::ifstream in(file);
  if(!in)
    {
    return false;
    }
  int size = 0;
  this->ReadArraySize(in, size);
  char c = 0;
  in.get(c);
  if(c != '{')
    {
    cmCTestLog(this->CTest, ERROR_MESSAGE,
               "failed to read open array\n");
    return false;
    }
  for(int i =0; i < size; i++)
    {
    if(!this->ReadFileInformation(in))
      {
      cmCTestLog(this->CTest, ERROR_MESSAGE,
                 "Failed to read file #" << i << "\n");
      return false;
      }
    in.get(c);
    if(c != '}')
      {
      cmCTestLog(this->CTest, ERROR_MESSAGE,
                 "failed to read close array\n");
      return false;
      }
    }
  return true;
}

bool cmParsePHPCoverage::ReadPHPCoverageDirectory(const char* d)
{
  cmsys::Directory dir;
  if(!dir.Load(d))
    {
    return false;
    }
  size_t numf;
  unsigned int i;
  numf = dir.GetNumberOfFiles();
  for (i = 0; i < numf; i++)
    {
    std::string file = dir.GetFile(i);
    if(file != "." && file != ".."
       && !cmSystemTools::FileIsDirectory(file))
      {
      std::string path = d;
      path += "/";
      path += file;
      if(!this->ReadPHPData(path.c_str()))
        {
        return false;
        }
      }
    }
  return true;
}