// SPDX-License-Identifier: MIT
#include "ConfigDefines.h"
#include "Common/cpp-optparse/OptionParser.h"
#include "Common/Config.h"
#include "Common/FEXServerClient.h"
#include "FEXHeaderUtils/Filesystem.h"
#include "git_version.h"
#include <FEXCore/Config/Config.h>
#include <FEXCore/fextl/fmt.h>
#include <FEXCore/fextl/string.h>
#include <FEXHeaderUtils/Filesystem.h>

#include <stdio.h>
#include <string>

int main(int argc, char** argv, char** envp) {
  FEXCore::Config::Initialize();
  FEXCore::Config::AddLayer(FEX::Config::CreateGlobalMainLayer());
  FEXCore::Config::AddLayer(FEX::Config::CreateMainLayer());
  // No FEX arguments passed through command line
  FEXCore::Config::AddLayer(FEX::Config::CreateEnvironmentLayer(envp));
  FEXCore::Config::Load();

  // Load the arguments
  optparse::OptionParser Parser = optparse::OptionParser().description("Simple application to get a couple of FEX options");

  Parser.add_option("--install-prefix").action("store_true").help("Print the FEX install prefix");

  Parser.add_option("--app").help("Load an application profile for this application if it exists");

  Parser.add_option("--current-rootfs").action("store_true").help("Print the directory that contains the FEX rootfs. Mounted in the case of squashfs");

  Parser.add_option("--version").action("store_true").help("Print the installed FEX-Emu version");

  optparse::Values Options = Parser.parse_args(argc, argv);

  if (Options.is_set_by_user("app")) {
    // Load the application config if one was provided
    const auto ProgramName = FHU::Filesystem::GetFilename(Options["app"]);
    FEXCore::Config::AddLayer(FEX::Config::CreateAppLayer(ProgramName, FEXCore::Config::LayerType::LAYER_GLOBAL_APP));
    FEXCore::Config::AddLayer(FEX::Config::CreateAppLayer(ProgramName, FEXCore::Config::LayerType::LAYER_LOCAL_APP));

    auto SteamID = getenv("SteamAppId");
    if (SteamID) {
      // If a SteamID exists then let's search for Steam application configs as well.
      // We want to key off both the SteamAppId number /and/ the executable since we may not want to thunk all binaries.
      const auto SteamAppName = fextl::fmt::format("Steam_{}_{}", SteamID, ProgramName);
      FEXCore::Config::AddLayer(FEX::Config::CreateAppLayer(SteamAppName, FEXCore::Config::LayerType::LAYER_GLOBAL_STEAM_APP));
      FEXCore::Config::AddLayer(FEX::Config::CreateAppLayer(SteamAppName, FEXCore::Config::LayerType::LAYER_LOCAL_STEAM_APP));
    }
  }

  // Reload the meta layer
  FEXCore::Config::ReloadMetaLayer();

  if (Options.is_set_by_user("version")) {
    fprintf(stdout, GIT_DESCRIBE_STRING "\n");
  }

  if (Options.is_set_by_user("install_prefix")) {
    fprintf(stdout, FEX_INSTALL_PREFIX "\n");
  }

  if (Options.is_set_by_user("current_rootfs")) {
    int ServerFD = FEXServerClient::ConnectToServer();
    if (ServerFD != -1) {
      auto RootFS = FEXServerClient::RequestRootFSPath(ServerFD);
      if (!RootFS.empty()) {
        fprintf(stdout, "%s\n", RootFS.c_str());
      }
    }
  }

  return 0;
}