/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
   file Copyright.txt or https://cmake.org/licensing for details.  */
#include "cmCTestVC.h"

#include <cstdio>
#include <ctime>
#include <sstream>
#include <vector>

#include "cmsys/Process.h"

#include "cmCTest.h"
#include "cmStringAlgorithms.h"
#include "cmSystemTools.h"
#include "cmXMLWriter.h"

cmCTestVC::cmCTestVC(cmCTest* ct, std::ostream& log)
  : CTest(ct)
  , Log(log)
{
  this->PathCount[PathUpdated] = 0;
  this->PathCount[PathModified] = 0;
  this->PathCount[PathConflicting] = 0;
  this->Unknown.Date = "Unknown";
  this->Unknown.Author = "Unknown";
  this->Unknown.Rev = "Unknown";
}

cmCTestVC::~cmCTestVC() = default;

void cmCTestVC::SetCommandLineTool(std::string const& tool)
{
  this->CommandLineTool = tool;
}

void cmCTestVC::SetSourceDirectory(std::string const& dir)
{
  this->SourceDirectory = dir;
}

bool cmCTestVC::InitialCheckout(const char* command)
{
  cmCTestLog(this->CTest, HANDLER_OUTPUT,
             "   First perform the initial checkout: " << command << "\n");

  // Make the parent directory in which to perform the checkout.
  std::string parent = cmSystemTools::GetFilenamePath(this->SourceDirectory);
  cmCTestLog(this->CTest, HANDLER_OUTPUT,
             "   Perform checkout in directory: " << parent << "\n");
  if (!cmSystemTools::MakeDirectory(parent)) {
    cmCTestLog(this->CTest, ERROR_MESSAGE,
               "Cannot create directory: " << parent << std::endl);
    return false;
  }

  // Construct the initial checkout command line.
  std::vector<std::string> args = cmSystemTools::ParseArguments(command);
  std::vector<char const*> vc_co;
  vc_co.reserve(args.size() + 1);
  for (std::string const& arg : args) {
    vc_co.push_back(arg.c_str());
  }
  vc_co.push_back(nullptr);

  // Run the initial checkout command and log its output.
  this->Log << "--- Begin Initial Checkout ---\n";
  OutputLogger out(this->Log, "co-out> ");
  OutputLogger err(this->Log, "co-err> ");
  bool result = this->RunChild(&vc_co[0], &out, &err, parent.c_str());
  this->Log << "--- End Initial Checkout ---\n";
  if (!result) {
    cmCTestLog(this->CTest, ERROR_MESSAGE,
               "Initial checkout failed!" << std::endl);
  }
  return result;
}

bool cmCTestVC::RunChild(char const* const* cmd, OutputParser* out,
                         OutputParser* err, const char* workDir,
                         Encoding encoding)
{
  this->Log << cmCTestVC::ComputeCommandLine(cmd) << "\n";

  cmsysProcess* cp = cmsysProcess_New();
  cmsysProcess_SetCommand(cp, cmd);
  workDir = workDir ? workDir : this->SourceDirectory.c_str();
  cmsysProcess_SetWorkingDirectory(cp, workDir);
  cmCTestVC::RunProcess(cp, out, err, encoding);
  int result = cmsysProcess_GetExitValue(cp);
  cmsysProcess_Delete(cp);
  return result == 0;
}

std::string cmCTestVC::ComputeCommandLine(char const* const* cmd)
{
  std::ostringstream line;
  const char* sep = "";
  for (const char* const* arg = cmd; *arg; ++arg) {
    line << sep << "\"" << *arg << "\"";
    sep = " ";
  }
  return line.str();
}

bool cmCTestVC::RunUpdateCommand(char const* const* cmd, OutputParser* out,
                                 OutputParser* err, Encoding encoding)
{
  // Report the command line.
  this->UpdateCommandLine = this->ComputeCommandLine(cmd);
  if (this->CTest->GetShowOnly()) {
    this->Log << this->UpdateCommandLine << "\n";
    return true;
  }

  // Run the command.
  return this->RunChild(cmd, out, err, nullptr, encoding);
}

std::string cmCTestVC::GetNightlyTime()
{
  // Get the nightly start time corresponding to the current dau.
  struct tm* t = this->CTest->GetNightlyTime(
    this->CTest->GetCTestConfiguration("NightlyStartTime"),
    this->CTest->GetTomorrowTag());
  char current_time[1024];
  sprintf(current_time, "%04d-%02d-%02d %02d:%02d:%02d", t->tm_year + 1900,
          t->tm_mon + 1, t->tm_mday, t->tm_hour, t->tm_min, t->tm_sec);
  return std::string(current_time);
}

void cmCTestVC::Cleanup()
{
  this->Log << "--- Begin Cleanup ---\n";
  this->CleanupImpl();
  this->Log << "--- End Cleanup ---\n";
}

void cmCTestVC::CleanupImpl()
{
  // We do no cleanup by default.
}

bool cmCTestVC::Update()
{
  bool result = true;

  // Use the explicitly specified version.
  std::string versionOverride =
    this->CTest->GetCTestConfiguration("UpdateVersionOverride");
  if (!versionOverride.empty()) {
    this->SetNewRevision(versionOverride);
    return true;
  }

  // if update version only is on then do not actually update,
  // just note the current version and finish
  if (!cmIsOn(this->CTest->GetCTestConfiguration("UpdateVersionOnly"))) {
    result = this->NoteOldRevision() && result;
    this->Log << "--- Begin Update ---\n";
    result = this->UpdateImpl() && result;
    this->Log << "--- End Update ---\n";
  }
  result = this->NoteNewRevision() && result;
  return result;
}

bool cmCTestVC::NoteOldRevision()
{
  // We do nothing by default.
  return true;
}

bool cmCTestVC::NoteNewRevision()
{
  // We do nothing by default.
  return true;
}

void cmCTestVC::SetNewRevision(std::string const& /*unused*/)
{
  // We do nothing by default.
}

bool cmCTestVC::UpdateImpl()
{
  cmCTestLog(this->CTest, HANDLER_VERBOSE_OUTPUT,
             "* Unknown VCS tool, not updating!" << std::endl);
  return true;
}

bool cmCTestVC::WriteXML(cmXMLWriter& xml)
{
  this->Log << "--- Begin Revisions ---\n";
  bool result = this->WriteXMLUpdates(xml);
  this->Log << "--- End Revisions ---\n";
  return result;
}

bool cmCTestVC::WriteXMLUpdates(cmXMLWriter& /*unused*/)
{
  cmCTestLog(this->CTest, HANDLER_VERBOSE_OUTPUT,
             "* CTest cannot extract updates for this VCS tool.\n");
  return true;
}

void cmCTestVC::WriteXMLEntry(cmXMLWriter& xml, std::string const& path,
                              std::string const& name, std::string const& full,
                              File const& f)
{
  static const char* desc[3] = { "Updated", "Modified", "Conflicting" };
  Revision const& rev = f.Rev ? *f.Rev : this->Unknown;
  std::string prior = f.PriorRev ? f.PriorRev->Rev : std::string("Unknown");
  xml.StartElement(desc[f.Status]);
  xml.Element("File", name);
  xml.Element("Directory", path);
  xml.Element("FullName", full);
  xml.Element("CheckinDate", rev.Date);
  xml.Element("Author", rev.Author);
  xml.Element("Email", rev.EMail);
  xml.Element("Committer", rev.Committer);
  xml.Element("CommitterEmail", rev.CommitterEMail);
  xml.Element("CommitDate", rev.CommitDate);
  xml.Element("Log", rev.Log);
  xml.Element("Revision", rev.Rev);
  xml.Element("PriorRevision", prior);
  xml.EndElement();
  ++this->PathCount[f.Status];
}