#include "selfdrive/ui/qt/home.h"

#include <QHBoxLayout>
#include <QMouseEvent>
#include <QStackedWidget>
#include <QVBoxLayout>

#include "selfdrive/ui/qt/offroad/experimental_mode.h"
#include "selfdrive/ui/qt/util.h"
#include "selfdrive/ui/qt/widgets/drive_stats.h"
#include "system/hardware/hw.h"

#ifdef ENABLE_MAPS
#include "selfdrive/ui/qt/maps/map_settings.h"
#endif

#include <pybind11/embed.h> // pybind11 header to control Python embedding
namespace py = pybind11;

// HomeWindow: the container for the offroad and onroad UIs

HomeWindow::HomeWindow(QWidget* parent) : QWidget(parent) {
  // CLEARPILOT Sidebar set to invisible in drive view.
  params.putBool("Sidebar", false);

  QHBoxLayout *main_layout = new QHBoxLayout(this);
  main_layout->setMargin(0);
  main_layout->setSpacing(0);

  sidebar = new Sidebar(this);
  main_layout->addWidget(sidebar);
  QObject::connect(sidebar, &Sidebar::openSettings, this, &HomeWindow::openSettings);

  slayout = new QStackedLayout();
  main_layout->addLayout(slayout);

  home = new OffroadHome(this);
  QObject::connect(home, &OffroadHome::openSettings, this, &HomeWindow::openSettings);
  slayout->addWidget(home);

  onroad = new OnroadWindow(this);
  QObject::connect(onroad, &OnroadWindow::mapPanelRequested, this, [=] { sidebar->hide(); });
  slayout->addWidget(onroad);

  body = new BodyWindow(this);
  slayout->addWidget(body);

  // CLEARPILOT
  ready = new ReadyWindow(this);
  slayout->addWidget(ready);
  
  driver_view = new DriverViewWindow(this);
  connect(driver_view, &DriverViewWindow::done, [=] {
    showDriverView(false);
  });
  slayout->addWidget(driver_view);

  setAttribute(Qt::WA_NoSystemBackground);

  QObject::connect(uiState(), &UIState::uiUpdate, this, &HomeWindow::updateState);
  QObject::connect(uiState(), &UIState::offroadTransition, this, &HomeWindow::offroadTransition);
  QObject::connect(uiState(), &UIState::offroadTransition, sidebar, &Sidebar::offroadTransition);
}

void HomeWindow::showSidebar(bool show) {
  sidebar->setVisible(show);
}

void HomeWindow::showMapPanel(bool show) {
  onroad->showMapPanel(show);
}

void HomeWindow::updateState(const UIState &s) {
  // const SubMaster &sm = *(s.sm);

  // CLEARPILOT
  // switch to the generic robot UI
  // if (onroad->isVisible() && !body->isEnabled() && sm["carParams"].getCarParams().getNotCar()) {
  //   body->setEnabled(true);
  //   slayout->setCurrentWidget(body);
  // }

  if (s.scene.started) {
    showDriverView(s.scene.driver_camera_timer >= 10, true);
  }
}

void HomeWindow::offroadTransition(bool offroad) {
  body->setEnabled(false);
  if (offroad) {
    sidebar->setVisible(false);
    slayout->setCurrentWidget(ready);
    // this->showDriverView(true, true);  // Temp
  } else {
    sidebar->setVisible(false);
    slayout->setCurrentWidget(onroad);
    uiState()->scene.map_open = onroad->isMapVisible();
  }
}

void HomeWindow::showDriverView(bool show, bool started) {
  if (show) {
    emit closeSettings();
    slayout->setCurrentWidget(driver_view);
    sidebar->setVisible(show == false);
  } else {
    if (started) {
      slayout->setCurrentWidget(onroad);
      sidebar->setVisible(params.getBool("Sidebar"));
    } else {
      slayout->setCurrentWidget(home);
      sidebar->setVisible(show == false);
    }
  }
}

void HomeWindow::mousePressEvent(QMouseEvent* e) {
  // CLEARPILOT todo - tap on main goes straight to settings
  // Unless we click a debug widget.

  // Handle sidebar collapsing
  // if ((onroad->isVisible() || body->isVisible()) && (!sidebar->isVisible() || e->x() > sidebar->width())) {
  //   sidebar->setVisible(!sidebar->isVisible() && !onroad->isMapVisible());
  //   uiState()->scene.map_open = onroad->isMapVisible();
  //   params.putBool("Sidebar", sidebar->isVisible());
  // }

  // CLEARPILOT - click ready shows home
  if (!onroad->isVisible() && ready->isVisible()) {
    sidebar->setVisible(true);
    slayout->setCurrentWidget(home);
  }

  // Todo: widgets
  if (onroad->isVisible()) {
    emit openSettings();
  }
}

void HomeWindow::mouseDoubleClickEvent(QMouseEvent* e) {
  HomeWindow::mousePressEvent(e);
  const SubMaster &sm = *(uiState()->sm);
  if (sm["carParams"].getCarParams().getNotCar()) {
    if (onroad->isVisible()) {
      slayout->setCurrentWidget(body);
    } else if (body->isVisible()) {
      slayout->setCurrentWidget(onroad);
    }
    showSidebar(false);
  }
}

// OffroadHome: the offroad home page

OffroadHome::OffroadHome(QWidget* parent) : QFrame(parent) {
  QVBoxLayout* main_layout = new QVBoxLayout(this);
  main_layout->setContentsMargins(40, 40, 40, 40);

  // top header
  QHBoxLayout* header_layout = new QHBoxLayout();
  header_layout->setContentsMargins(0, 0, 0, 0);
  header_layout->setSpacing(16);

  update_notif = new QPushButton(tr("UPDATE"));
  update_notif->setVisible(false);
  update_notif->setStyleSheet("background-color: #364DEF;");
  QObject::connect(update_notif, &QPushButton::clicked, [=]() { center_layout->setCurrentIndex(1); });
  header_layout->addWidget(update_notif, 0, Qt::AlignHCenter | Qt::AlignLeft);

  alert_notif = new QPushButton();
  alert_notif->setVisible(false);
  alert_notif->setStyleSheet("background-color: #E22C2C;");
  QObject::connect(alert_notif, &QPushButton::clicked, [=] { center_layout->setCurrentIndex(2); });
  header_layout->addWidget(alert_notif, 0, Qt::AlignHCenter | Qt::AlignLeft);

  date = new ElidedLabel();
  header_layout->addWidget(date, 0, Qt::AlignHCenter | Qt::AlignLeft);

  version = new ElidedLabel();
  header_layout->addWidget(version, 0, Qt::AlignHCenter | Qt::AlignRight);

  main_layout->addLayout(header_layout);

  // main content
  main_layout->addSpacing(25);
  center_layout = new QStackedLayout();

  QWidget *home_widget = new QWidget(this);
  {
    QHBoxLayout *home_layout = new QHBoxLayout(home_widget);
    home_layout->setContentsMargins(0, 0, 0, 0);
    home_layout->setSpacing(30);

    // Clearpilot: removed home ui widgets
    py::scoped_interpreter guard{}; // Start the Python interpreter
    auto python_module = py::module_::import("/data/openpilot/webviewtest.py");
    auto WebViewWidget = python_module.attr("WebViewWidget");

    auto python_widget_instance = WebViewWidget();
    auto* python_widget_embedded = python_widget_instance.cast<QWidget*>();
    home_layout->addWidget(python_widget_embedded);
  }
  center_layout->addWidget(home_widget);

  // add update & alerts widgets
  update_widget = new UpdateAlert();
  QObject::connect(update_widget, &UpdateAlert::dismiss, [=]() { center_layout->setCurrentIndex(0); });
  center_layout->addWidget(update_widget);
  alerts_widget = new OffroadAlert();
  QObject::connect(alerts_widget, &OffroadAlert::dismiss, [=]() { center_layout->setCurrentIndex(0); });
  center_layout->addWidget(alerts_widget);

  main_layout->addLayout(center_layout, 1);

  // set up refresh timer
  timer = new QTimer(this);
  timer->callOnTimeout(this, &OffroadHome::refresh);

  setStyleSheet(R"(
    * {
      color: white;
    }
    OffroadHome {
      background-color: black;
    }
    OffroadHome > QPushButton {
      padding: 15px 30px;
      border-radius: 5px;
      font-size: 40px;
      font-weight: 500;
    }
    OffroadHome > QLabel {
      font-size: 55px;
    }
  )");
}

/* Refresh data on screen every 5 seconds. */
void OffroadHome::showEvent(QShowEvent *event) {
  refresh();
  timer->start(5 * 1000);
}

void OffroadHome::hideEvent(QHideEvent *event) {
  timer->stop();
}

void OffroadHome::refresh() {
  QString model = QString::fromStdString(params.get("ModelName"));

  date->setText(QLocale(uiState()->language.mid(5)).toString(QDateTime::currentDateTime(), "dddd, MMMM d"));
  version->setText(getBrand() + " v" + getVersion().left(14).trimmed() + " - " + model);

  bool updateAvailable = update_widget->refresh();
  int alerts = alerts_widget->refresh();
  if (alerts > 0 && !alerts_widget->isVisible()) {
    alerts_widget->setVisible(true);
  } else if (alerts == 0 && alerts_widget->isVisible()) {
    alerts_widget->setVisible(false);
  }

  // pop-up new notification
  // CLEARPILOT temp disabled update notifications
  int idx = center_layout->currentIndex();
  if (!updateAvailable && !alerts && false) {
    idx = 0;
  } else if (updateAvailable && (!update_notif->isVisible() || (!alerts && idx == 2))) {
    idx = 1;
  } else if (alerts && (!alert_notif->isVisible() || (!updateAvailable && idx == 1))) {
    idx = 2;
  }
  center_layout->setCurrentIndex(idx);

  // CLEARPILOT temp disabled update notifications
//  update_notif->setVisible(updateAvailable);
//  alert_notif->setVisible(alerts);
  update_notif->setVisible(false);
  alert_notif->setVisible(false);
  if (alerts) {
    alert_notif->setText(QString::number(alerts) + (alerts > 1 ? tr(" ALERTS") : tr(" ALERT")));
  }
}