#if _WIN32
#ifndef NOMINMAX
#define NOMINMAX
#endif
#define WIN_PAUSE 0
#include <objbase.h>
#endif

#include <clocale>
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <cstdarg>
#include <signal.h>
#include <regex>
#include <list>
#include "hecl/Database.hpp"
#include "hecl/Blender/Connection.hpp"
#include "logvisor/logvisor.hpp"

logvisor::Module LogModule("hecl::Driver");

#include "ToolBase.hpp"
#include "ToolInit.hpp"
#include "ToolSpec.hpp"
#include "ToolExtract.hpp"
#include "ToolCook.hpp"
#include "ToolPackage.hpp"
#include "ToolImage.hpp"
#include "ToolHelp.hpp"

/* Static reference to dataspec additions
 * (used by MSVC to definitively link DataSpecs) */
#include "DataSpecRegistry.hpp"

bool XTERM_COLOR = false;

/*
#define HECL_GIT 1234567
#define HECL_GIT_S "1234567"
#define HECL_BRANCH master
#define HECL_BRANCH_S "master"
*/

/* Main usage message */
static void printHelp(const hecl::SystemChar* pname) {
  if (XTERM_COLOR)
    fmt::print(fmt(_SYS_STR("" BOLD "HECL" NORMAL "")));
  else
    fmt::print(fmt(_SYS_STR("HECL")));
#if HECL_HAS_NOD
#define TOOL_LIST "extract|init|cook|package|image|help"
#else
#define TOOL_LIST "extract|init|cook|package|help"
#endif
#if HECL_GIT
  fmt::print(fmt(_SYS_STR(" Commit " HECL_GIT_S " " HECL_BRANCH_S "\nUsage: {} " TOOL_LIST "\n")), pname);
#elif HECL_VER
  fmt::print(fmt(_SYS_STR(" Version " HECL_VER_S "\nUsage: {} " TOOL_LIST "\n")), pname);
#else
  fmt::print(fmt(_SYS_STR("\nUsage: {} " TOOL_LIST "\n")), pname);
#endif
}

/* Regex patterns */
static const hecl::SystemRegex regOPEN(_SYS_STR("-o([^\"]*|\\S*)"), std::regex::ECMAScript | std::regex::optimize);

static ToolBase* ToolPtr = nullptr;

/* SIGINT will gracefully close blender connections and delete blends in progress */
static void SIGINTHandler(int sig) {
  if (ToolPtr)
    ToolPtr->cancel();
  hecl::blender::Connection::Shutdown();
  logvisor::KillProcessTree();
  exit(1);
}

static logvisor::Module AthenaLog("Athena");
static void AthenaExc(athena::error::Level level, const char* file, const char*, int line,
                      fmt::string_view fmt, fmt::format_args args) {
  AthenaLog.vreport(logvisor::Level(level), fmt, args);
}

static hecl::SystemChar cwdbuf[1024];
hecl::SystemString ExeDir;

#if _WIN32
int wmain(int argc, const wchar_t** argv)
#else
/* SIGWINCH should do nothing */
static void SIGWINCHHandler(int sig) {}
int main(int argc, const char** argv)
#endif
{
  if (argc > 1 && !hecl::StrCmp(argv[1], _SYS_STR("--dlpackage"))) {
    fmt::print(fmt("{}\n"), HECL_DLPACKAGE);
    return 100;
  }

#if _WIN32
  CoInitializeEx(nullptr, COINIT_MULTITHREADED | COINIT_DISABLE_OLE1DDE);
#else
  std::setlocale(LC_ALL, "en-US.UTF-8");
#endif

  /* Xterm check */
#if _WIN32
  const char* conemuANSI = getenv("ConEmuANSI");
  if (conemuANSI && !strcmp(conemuANSI, "ON"))
    XTERM_COLOR = true;
#else
  const char* term = getenv("TERM");
  if (term && !strncmp(term, "xterm", 5))
    XTERM_COLOR = true;
  signal(SIGWINCH, SIGWINCHHandler);
#endif
  signal(SIGINT, SIGINTHandler);

  logvisor::RegisterStandardExceptions();
  logvisor::RegisterConsoleLogger();
  atSetExceptionHandler(AthenaExc);

  /* Basic usage check */
  if (argc == 1) {
    printHelp(argv[0]);
#if WIN_PAUSE
    system("PAUSE");
#endif
    return 0;
  } else if (argc == 0) {
    printHelp(_SYS_STR("hecl"));
#if WIN_PAUSE
    system("PAUSE");
#endif
    return 0;
  }

  /* Prepare DataSpecs */
  HECLRegisterDataSpecs();

  /* Assemble common tool pass info */
  ToolPassInfo info;
  info.pname = argv[0];
  if (hecl::Getcwd(cwdbuf, 1024)) {
    info.cwd = cwdbuf;
    if (info.cwd.size() && info.cwd.back() != _SYS_STR('/') && info.cwd.back() != _SYS_STR('\\'))
#if _WIN32
      info.cwd += _SYS_STR('\\');
#else
      info.cwd += _SYS_STR('/');
#endif

    if (hecl::PathRelative(argv[0]))
      ExeDir = hecl::SystemString(cwdbuf) + _SYS_STR('/');
    hecl::SystemString Argv0(argv[0]);
    hecl::SystemString::size_type lastIdx = Argv0.find_last_of(_SYS_STR("/\\"));
    if (lastIdx != hecl::SystemString::npos)
      ExeDir.insert(ExeDir.end(), Argv0.begin(), Argv0.begin() + lastIdx);
  }

  /* Concatenate args */
  std::vector<hecl::SystemString> args;
  args.reserve(argc - 2);
  for (int i = 2; i < argc; ++i)
    args.push_back(hecl::SystemString(argv[i]));

  if (!args.empty()) {
    /* Extract output argument */
    for (auto it = args.cbegin(); it != args.cend();) {
      const hecl::SystemString& arg = *it;
      hecl::SystemRegexMatch oMatch;
      if (std::regex_search(arg, oMatch, regOPEN)) {
        const hecl::SystemString& token = oMatch[1].str();
        if (token.size()) {
          if (info.output.empty())
            info.output = oMatch[1].str();
          it = args.erase(it);
        } else {
          it = args.erase(it);
          if (it == args.end())
            break;
          if (info.output.empty())
            info.output = *it;
          it = args.erase(it);
        }
        continue;
      }
      ++it;
    }

    /* Iterate flags */
    bool threadArg = false;
    for (auto it = args.cbegin(); it != args.cend();) {
      const hecl::SystemString& arg = *it;
      if (threadArg) {
        threadArg = false;
        hecl::CpuCountOverride = int(hecl::StrToUl(arg.c_str(), nullptr, 0));
        it = args.erase(it);
        continue;
      }
      if (arg.size() < 2 || arg[0] != _SYS_STR('-') || arg[1] == _SYS_STR('-')) {
        ++it;
        continue;
      }

      for (auto chit = arg.cbegin() + 1; chit != arg.cend(); ++chit) {
        if (*chit == _SYS_STR('v'))
          ++info.verbosityLevel;
        else if (*chit == _SYS_STR('f'))
          info.force = true;
        else if (*chit == _SYS_STR('y'))
          info.yes = true;
        else if (*chit == _SYS_STR('g'))
          info.gui = true;
        else if (*chit == _SYS_STR('j')) {
          ++chit;
          if (*chit)
            hecl::CpuCountOverride = int(hecl::StrToUl(&*chit, nullptr, 0));
          else
            threadArg = true;
          break;
        }
        else
          info.flags.push_back(*chit);
      }

      it = args.erase(it);
    }

    /* Gather remaining args */
    info.args.reserve(args.size());
    for (const hecl::SystemString& arg : args)
      info.args.push_back(arg);
  }

  /* Attempt to find hecl project */
  hecl::ProjectRootPath rootPath = hecl::SearchForProject(info.cwd);
  std::unique_ptr<hecl::Database::Project> project;
  if (rootPath) {
    size_t ErrorRef = logvisor::ErrorCount;
    hecl::Database::Project* newProj = new hecl::Database::Project(rootPath);
    if (logvisor::ErrorCount > ErrorRef) {
#if WIN_PAUSE
      system("PAUSE");
#endif
      delete newProj;
      return 1;
    }
    project.reset(newProj);
    info.project = newProj;
  }

  /* Construct selected tool */
  hecl::SystemString toolName(argv[1]);
  hecl::ToLower(toolName);
  std::unique_ptr<ToolBase> tool;

  size_t ErrorRef = logvisor::ErrorCount;
  if (toolName == _SYS_STR("init"))
    tool.reset(new ToolInit(info));
  else if (toolName == _SYS_STR("spec"))
    tool.reset(new ToolSpec(info));
  else if (toolName == _SYS_STR("extract"))
    tool.reset(new ToolExtract(info));
  else if (toolName == _SYS_STR("cook"))
    tool.reset(new ToolCook(info));
  else if (toolName == _SYS_STR("package") || toolName == _SYS_STR("pack"))
    tool.reset(new ToolPackage(info));
#if HECL_HAS_NOD
  else if (toolName == _SYS_STR("image"))
    tool.reset(new ToolImage(info));
#endif
  else if (toolName == _SYS_STR("help"))
    tool.reset(new ToolHelp(info));
  else {
    FILE* fp = hecl::Fopen(argv[1], _SYS_STR("rb"));
    if (!fp)
      LogModule.report(logvisor::Error, fmt(_SYS_STR("unrecognized tool '{}'")), toolName);
    else {
      /* Shortcut-case: implicit extract */
      fclose(fp);
      info.args.insert(info.args.begin(), argv[1]);
      tool.reset(new ToolExtract(info));
    }
  }

  if (logvisor::ErrorCount > ErrorRef) {
#if WIN_PAUSE
    system("PAUSE");
#endif
    return 1;
  }

  if (info.verbosityLevel)
    LogModule.report(logvisor::Info, fmt(_SYS_STR("Constructed tool '{}' {}\n")), tool->toolName(), info.verbosityLevel);

  /* Run tool */
  ErrorRef = logvisor::ErrorCount;
  ToolPtr = tool.get();
  int retval = tool->run();
  ToolPtr = nullptr;
  if (logvisor::ErrorCount > ErrorRef) {
    hecl::blender::Connection::Shutdown();
#if WIN_PAUSE
    system("PAUSE");
#endif
    return 1;
  }

  hecl::blender::Connection::Shutdown();
#if WIN_PAUSE
  system("PAUSE");
#endif
  return retval;
}