// Copyright 2017 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.

#include "DolphinQt/NetPlay/NetPlaySetupDialog.h"

#include <QCheckBox>
#include <QComboBox>
#include <QDialogButtonBox>
#include <QGridLayout>
#include <QLabel>
#include <QLineEdit>
#include <QListWidget>
#include <QMessageBox>
#include <QPushButton>
#include <QSignalBlocker>
#include <QSpinBox>
#include <QTabWidget>

#include "Core/Config/NetplaySettings.h"

#include "DolphinQt/GameList/GameListModel.h"
#include "DolphinQt/Settings.h"

NetPlaySetupDialog::NetPlaySetupDialog(QWidget* parent)
    : QDialog(parent), m_game_list_model(Settings::Instance().GetGameListModel())
{
  setWindowTitle(tr("NetPlay Setup"));
  setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);

  CreateMainLayout();

  std::string nickname = Config::Get(Config::NETPLAY_NICKNAME);
  std::string traversal_choice = Config::Get(Config::NETPLAY_TRAVERSAL_CHOICE);
  int connect_port = Config::Get(Config::NETPLAY_CONNECT_PORT);
  int host_port = Config::Get(Config::NETPLAY_HOST_PORT);
  int host_listen_port = Config::Get(Config::NETPLAY_LISTEN_PORT);
  bool enable_chunked_upload_limit = Config::Get(Config::NETPLAY_ENABLE_CHUNKED_UPLOAD_LIMIT);
  u32 chunked_upload_limit = Config::Get(Config::NETPLAY_CHUNKED_UPLOAD_LIMIT);
#ifdef USE_UPNP
  bool use_upnp = Config::Get(Config::NETPLAY_USE_UPNP);

  m_host_upnp->setChecked(use_upnp);
#endif

  m_nickname_edit->setText(QString::fromStdString(nickname));
  m_connection_type->setCurrentIndex(traversal_choice == "direct" ? 0 : 1);
  m_connect_port_box->setValue(connect_port);
  m_host_port_box->setValue(host_port);

  m_host_force_port_check->setChecked(false);
  m_host_force_port_box->setValue(host_listen_port);
  m_host_force_port_box->setEnabled(false);

  m_host_chunked_upload_limit_check->setChecked(enable_chunked_upload_limit);
  m_host_chunked_upload_limit_box->setValue(chunked_upload_limit);
  m_host_chunked_upload_limit_box->setEnabled(enable_chunked_upload_limit);

  OnConnectionTypeChanged(m_connection_type->currentIndex());

  ConnectWidgets();
}

void NetPlaySetupDialog::CreateMainLayout()
{
  m_main_layout = new QGridLayout;
  m_button_box = new QDialogButtonBox(QDialogButtonBox::Cancel);
  m_nickname_edit = new QLineEdit;
  m_connection_type = new QComboBox;
  m_reset_traversal_button = new QPushButton(tr("Reset Traversal Settings"));
  m_tab_widget = new QTabWidget;

  // Connection widget
  auto* connection_widget = new QWidget;
  auto* connection_layout = new QGridLayout;

  m_ip_label = new QLabel;
  m_ip_edit = new QLineEdit;
  m_connect_port_label = new QLabel(tr("Port:"));
  m_connect_port_box = new QSpinBox;
  m_connect_button = new QPushButton(tr("Connect"));

  m_connect_port_box->setMaximum(65535);

  connection_layout->addWidget(m_ip_label, 0, 0);
  connection_layout->addWidget(m_ip_edit, 0, 1);
  connection_layout->addWidget(m_connect_port_label, 0, 2);
  connection_layout->addWidget(m_connect_port_box, 0, 3);
  connection_layout->addWidget(
      new QLabel(
          tr("ALERT:\n\n"
             "All players must use the same Dolphin version.\n"
             "If enabled, SD cards must be identical between players.\n"
             "If DSP LLE is used, DSP ROMs must be identical between players.\n"
             "If a game is hanging on boot, it may not support Dual Core Netplay."
             " Disable Dual Core.\n"
             "If connecting directly, the host must have the chosen UDP port open/forwarded!\n"
             "\n"
             "Wii Remote support in netplay is experimental and may not work correctly.\n"
             "Use at your own risk.\n")),
      1, 0, -1, -1);
  connection_layout->addWidget(m_connect_button, 3, 3, Qt::AlignRight);

  connection_widget->setLayout(connection_layout);

  // Host widget
  auto* host_widget = new QWidget;
  auto* host_layout = new QGridLayout;
  m_host_port_label = new QLabel(tr("Port:"));
  m_host_port_box = new QSpinBox;
  m_host_force_port_check = new QCheckBox(tr("Force Listen Port:"));
  m_host_force_port_box = new QSpinBox;
  m_host_chunked_upload_limit_check = new QCheckBox(tr("Limit Chunked Upload Speed:"));
  m_host_chunked_upload_limit_box = new QSpinBox;

#ifdef USE_UPNP
  m_host_upnp = new QCheckBox(tr("Forward port (UPnP)"));
#endif
  m_host_games = new QListWidget;
  m_host_button = new QPushButton(tr("Host"));

  m_host_port_box->setMaximum(65535);
  m_host_force_port_box->setMaximum(65535);
  m_host_chunked_upload_limit_box->setRange(1, 1000000);
  m_host_chunked_upload_limit_box->setSingleStep(100);
  m_host_chunked_upload_limit_box->setSuffix(QStringLiteral(" kbps"));

  m_host_chunked_upload_limit_check->setToolTip(tr(
      "This will limit the speed of chunked uploading per client, which is used for save sync."));

  host_layout->addWidget(m_host_port_label, 0, 0);
  host_layout->addWidget(m_host_port_box, 0, 1);
#ifdef USE_UPNP
  host_layout->addWidget(m_host_upnp, 0, 2);
#endif
  host_layout->addWidget(m_host_games, 1, 0, 1, -1);
  host_layout->addWidget(m_host_force_port_check, 2, 0);
  host_layout->addWidget(m_host_force_port_box, 2, 1, Qt::AlignLeft);
  host_layout->addWidget(m_host_chunked_upload_limit_check, 3, 0);
  host_layout->addWidget(m_host_chunked_upload_limit_box, 3, 1, Qt::AlignLeft);
  host_layout->addWidget(m_host_button, 2, 2, 2, 1, Qt::AlignRight);

  host_widget->setLayout(host_layout);

  m_connection_type->addItem(tr("Direct Connection"));
  m_connection_type->addItem(tr("Traversal Server"));

  m_main_layout->addWidget(new QLabel(tr("Connection Type:")), 0, 0);
  m_main_layout->addWidget(m_connection_type, 0, 1);
  m_main_layout->addWidget(m_reset_traversal_button, 0, 2);
  m_main_layout->addWidget(new QLabel(tr("Nickname:")), 1, 0);
  m_main_layout->addWidget(m_nickname_edit, 1, 1);
  m_main_layout->addWidget(m_tab_widget, 2, 0, 1, -1);
  m_main_layout->addWidget(m_button_box, 3, 0, 1, -1);

  // Tabs
  m_tab_widget->addTab(connection_widget, tr("Connect"));
  m_tab_widget->addTab(host_widget, tr("Host"));

  setLayout(m_main_layout);
}

void NetPlaySetupDialog::ConnectWidgets()
{
  connect(m_connection_type, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged),
          this, &NetPlaySetupDialog::OnConnectionTypeChanged);
  connect(m_nickname_edit, &QLineEdit::textChanged, this, &NetPlaySetupDialog::SaveSettings);

  // Connect widget
  connect(m_ip_edit, &QLineEdit::textChanged, this, &NetPlaySetupDialog::SaveSettings);
  connect(m_connect_port_box, static_cast<void (QSpinBox::*)(int)>(&QSpinBox::valueChanged), this,
          &NetPlaySetupDialog::SaveSettings);
  // Host widget
  connect(m_host_port_box, static_cast<void (QSpinBox::*)(int)>(&QSpinBox::valueChanged), this,
          &NetPlaySetupDialog::SaveSettings);
  connect(m_host_games, static_cast<void (QListWidget::*)(int)>(&QListWidget::currentRowChanged),
          [this](int index) {
            Settings::GetQSettings().setValue(QStringLiteral("netplay/hostgame"),
                                              m_host_games->item(index)->text());
          });

  connect(m_host_games, &QListWidget::itemDoubleClicked, this, &NetPlaySetupDialog::accept);

  connect(m_host_force_port_check, &QCheckBox::toggled,
          [this](bool value) { m_host_force_port_box->setEnabled(value); });
  connect(m_host_chunked_upload_limit_check, &QCheckBox::toggled, this, [this](bool value) {
    m_host_chunked_upload_limit_box->setEnabled(value);
    SaveSettings();
  });
  connect(m_host_chunked_upload_limit_box,
          static_cast<void (QSpinBox::*)(int)>(&QSpinBox::valueChanged), this,
          &NetPlaySetupDialog::SaveSettings);
#ifdef USE_UPNP
  connect(m_host_upnp, &QCheckBox::stateChanged, this, &NetPlaySetupDialog::SaveSettings);
#endif

  connect(m_connect_button, &QPushButton::clicked, this, &QDialog::accept);
  connect(m_host_button, &QPushButton::clicked, this, &QDialog::accept);
  connect(m_button_box, &QDialogButtonBox::rejected, this, &QDialog::reject);
  connect(m_reset_traversal_button, &QPushButton::clicked, this,
          &NetPlaySetupDialog::ResetTraversalHost);
}

void NetPlaySetupDialog::SaveSettings()
{
  Config::SetBaseOrCurrent(Config::NETPLAY_NICKNAME, m_nickname_edit->text().toStdString());
  Config::SetBaseOrCurrent(m_connection_type->currentIndex() == 0 ? Config::NETPLAY_ADDRESS :
                                                                    Config::NETPLAY_HOST_CODE,
                           m_ip_edit->text().toStdString());
  Config::SetBaseOrCurrent(Config::NETPLAY_CONNECT_PORT,
                           static_cast<u16>(m_connect_port_box->value()));
  Config::SetBaseOrCurrent(Config::NETPLAY_HOST_PORT, static_cast<u16>(m_host_port_box->value()));
#ifdef USE_UPNP
  Config::SetBaseOrCurrent(Config::NETPLAY_USE_UPNP, m_host_upnp->isChecked());
#endif

  if (m_host_force_port_check->isChecked())
    Config::SetBaseOrCurrent(Config::NETPLAY_LISTEN_PORT,
                             static_cast<u16>(m_host_force_port_box->value()));

  Config::SetBaseOrCurrent(Config::NETPLAY_ENABLE_CHUNKED_UPLOAD_LIMIT,
                           m_host_chunked_upload_limit_check->isChecked());
  Config::SetBaseOrCurrent(Config::NETPLAY_CHUNKED_UPLOAD_LIMIT,
                           m_host_chunked_upload_limit_box->value());
}

void NetPlaySetupDialog::OnConnectionTypeChanged(int index)
{
  m_connect_port_box->setHidden(index != 0);
  m_connect_port_label->setHidden(index != 0);

  m_host_port_label->setHidden(index != 0);
  m_host_port_box->setHidden(index != 0);
#ifdef USE_UPNP
  m_host_upnp->setHidden(index != 0);
#endif
  m_host_force_port_check->setHidden(index == 0);
  m_host_force_port_box->setHidden(index == 0);

  m_reset_traversal_button->setHidden(index == 0);

  std::string address =
      index == 0 ? Config::Get(Config::NETPLAY_ADDRESS) : Config::Get(Config::NETPLAY_HOST_CODE);

  m_ip_label->setText(index == 0 ? tr("IP Address:") : tr("Host Code:"));
  m_ip_edit->setText(QString::fromStdString(address));

  Config::SetBaseOrCurrent(Config::NETPLAY_TRAVERSAL_CHOICE,
                           std::string(index == 0 ? "direct" : "traversal"));
}

void NetPlaySetupDialog::show()
{
  PopulateGameList();
  QDialog::show();
}

void NetPlaySetupDialog::accept()
{
  SaveSettings();
  if (m_tab_widget->currentIndex() == 0)
  {
    emit Join();
  }
  else
  {
    auto items = m_host_games->selectedItems();
    if (items.empty())
    {
      QMessageBox::critical(this, tr("Error"), tr("You must select a game to host!"));
      return;
    }

    emit Host(items[0]->text());
  }
}

void NetPlaySetupDialog::PopulateGameList()
{
  QSignalBlocker blocker(m_host_games);

  m_host_games->clear();
  for (int i = 0; i < m_game_list_model->rowCount(QModelIndex()); i++)
  {
    auto title = m_game_list_model->GetUniqueIdentifier(i);
    auto path = m_game_list_model->GetPath(i);

    auto* item = new QListWidgetItem(title);
    item->setData(Qt::UserRole, path);
    m_host_games->addItem(item);
  }

  m_host_games->sortItems();

  QString selected_game = Settings::GetQSettings()
                              .value(QStringLiteral("netplay/hostgame"), QStringLiteral(""))
                              .toString();
  auto find_list = m_host_games->findItems(selected_game, Qt::MatchFlag::MatchExactly);

  if (find_list.count() > 0)
    m_host_games->setCurrentItem(find_list[0]);
}

void NetPlaySetupDialog::ResetTraversalHost()
{
  Config::SetBaseOrCurrent(Config::NETPLAY_TRAVERSAL_SERVER,
                           Config::NETPLAY_TRAVERSAL_SERVER.default_value);
  Config::SetBaseOrCurrent(Config::NETPLAY_TRAVERSAL_PORT,
                           Config::NETPLAY_TRAVERSAL_PORT.default_value);

  QMessageBox::information(
      this, tr("Reset Traversal Server"),
      tr("Reset Traversal Server to %1:%2")
          .arg(QString::fromStdString(Config::NETPLAY_TRAVERSAL_SERVER.default_value),
               QString::number(Config::NETPLAY_TRAVERSAL_PORT.default_value)));
}