#include "selfdrive/ui/qt/offroad/onboarding.h"

#include <QLabel>
#include <QPainter>
#include <QQmlContext>
#include <QQuickWidget>
#include <QTransform>
#include <QVBoxLayout>

#include "common/util.h"
#include "common/params.h"
#include "selfdrive/ui/qt/util.h"
#include "selfdrive/ui/qt/widgets/input.h"

TrainingGuide::TrainingGuide(QWidget *parent) : QFrame(parent) {
  setAttribute(Qt::WA_OpaquePaintEvent);
}

void TrainingGuide::mouseReleaseEvent(QMouseEvent *e) {
  if (click_timer.elapsed() < 250) {
    return;
  }
  click_timer.restart();

  auto contains = [this](QRect r, const QPoint &pt) {
    if (image.size() != image_raw_size) {
      QTransform transform;
      transform.translate((width()- image.width()) / 2.0, (height()- image.height()) / 2.0);
      transform.scale(image.width() / (float)image_raw_size.width(), image.height() / (float)image_raw_size.height());
      r= transform.mapRect(r);
    }
    return r.contains(pt);
  };

  if (contains(boundingRect[currentIndex], e->pos())) {
    if (currentIndex == 9) {
      const QRect yes = QRect(707, 804, 531, 164);
      Params().putBool("RecordFront", contains(yes, e->pos()));
    }
    currentIndex += 1;
  } else if (currentIndex == (boundingRect.size() - 2) && contains(boundingRect.last(), e->pos())) {
    currentIndex = 0;
  }

  if (currentIndex >= (boundingRect.size() - 1)) {
    emit completedTraining();
  } else {
    update();
  }
}

void TrainingGuide::showEvent(QShowEvent *event) {
  currentIndex = 0;
  click_timer.start();
}

QImage TrainingGuide::loadImage(int id) {
  QImage img(img_path + QString("step%1.png").arg(id));
  image_raw_size = img.size();
  if (image_raw_size != rect().size()) {
    img = img.scaled(width(), height(), Qt::KeepAspectRatio, Qt::SmoothTransformation);
  }
  return img;
}

void TrainingGuide::paintEvent(QPaintEvent *event) {
  QPainter painter(this);

  QRect bg(0, 0, painter.device()->width(), painter.device()->height());
  painter.fillRect(bg, QColor("#000000"));

  image = loadImage(currentIndex);
  QRect rect(image.rect());
  rect.moveCenter(bg.center());
  painter.drawImage(rect.topLeft(), image);

  // progress bar
  if (currentIndex > 0 && currentIndex < (boundingRect.size() - 2)) {
    const int h = 20;
    const int w = (currentIndex / (float)(boundingRect.size() - 2)) * width();
    painter.fillRect(QRect(0, height() - h, w, h), QColor("#465BEA"));
  }
}

void TermsPage::showEvent(QShowEvent *event) {
  // late init, building QML widget takes 200ms
  if (layout()) {
    return;
  }

  QVBoxLayout *main_layout = new QVBoxLayout(this);
  main_layout->setContentsMargins(45, 35, 45, 45);
  main_layout->setSpacing(0);

  QLabel *title = new QLabel(tr("Terms & Conditions"));
  title->setStyleSheet("font-size: 90px; font-weight: 600;");
  main_layout->addWidget(title);

  main_layout->addSpacing(30);

  QQuickWidget *text = new QQuickWidget(this);
  text->setResizeMode(QQuickWidget::SizeRootObjectToView);
  text->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
  text->setAttribute(Qt::WA_AlwaysStackOnTop);
  text->setClearColor(QColor("#1B1B1B"));

  QString text_view = util::read_file("../assets/offroad/tc.html").c_str();
  text->rootContext()->setContextProperty("text_view", text_view);

  text->setSource(QUrl::fromLocalFile("qt/offroad/text_view.qml"));

  main_layout->addWidget(text, 1);
  main_layout->addSpacing(50);

  QObject *obj = (QObject*)text->rootObject();
  QObject::connect(obj, SIGNAL(scroll()), SLOT(enableAccept()));

  QHBoxLayout* buttons = new QHBoxLayout;
  buttons->setMargin(0);
  buttons->setSpacing(45);
  main_layout->addLayout(buttons);

  QPushButton *decline_btn = new QPushButton(tr("Decline"));
  buttons->addWidget(decline_btn);
  QObject::connect(decline_btn, &QPushButton::clicked, this, &TermsPage::declinedTerms);

  accept_btn = new QPushButton(tr("Scroll to accept"));
  accept_btn->setEnabled(false);
  accept_btn->setStyleSheet(R"(
    QPushButton {
      background-color: #465BEA;
    }
    QPushButton:pressed {
      background-color: #3049F4;
    }
    QPushButton:disabled {
      background-color: #4F4F4F;
    }
  )");
  buttons->addWidget(accept_btn);
  QObject::connect(accept_btn, &QPushButton::clicked, this, &TermsPage::acceptedTerms);
}

void TermsPage::enableAccept() {
  accept_btn->setText(tr("Agree"));
  accept_btn->setEnabled(true);
}

void DeclinePage::showEvent(QShowEvent *event) {
  if (layout()) {
    return;
  }

  QVBoxLayout *main_layout = new QVBoxLayout(this);
  main_layout->setMargin(45);
  main_layout->setSpacing(40);

  QLabel *text = new QLabel(this);
  text->setText(tr("You must accept the Terms and Conditions in order to use openpilot."));
  text->setStyleSheet(R"(font-size: 80px; font-weight: 300; margin: 200px;)");
  text->setWordWrap(true);
  main_layout->addWidget(text, 0, Qt::AlignCenter);

  QHBoxLayout* buttons = new QHBoxLayout;
  buttons->setSpacing(45);
  main_layout->addLayout(buttons);

  QPushButton *back_btn = new QPushButton(tr("Back"));
  buttons->addWidget(back_btn);

  QObject::connect(back_btn, &QPushButton::clicked, this, &DeclinePage::getBack);

  QPushButton *uninstall_btn = new QPushButton(tr("Decline, uninstall %1").arg(getBrand()));
  uninstall_btn->setStyleSheet("background-color: #B73D3D");
  buttons->addWidget(uninstall_btn);
  QObject::connect(uninstall_btn, &QPushButton::clicked, [=]() {
    Params().putBool("DoUninstall", true);
  });
}

void OnboardingWindow::updateActiveScreen() {
  if (!accepted_terms) {
    setCurrentIndex(0);
  } else if (!training_done && !params.getBool("Passive")) {
    setCurrentIndex(1);
  } else {
    emit onboardingDone();
  }
}

OnboardingWindow::OnboardingWindow(QWidget *parent) : QStackedWidget(parent) {
  std::string current_terms_version = params.get("TermsVersion");
  std::string current_training_version = params.get("TrainingVersion");
  accepted_terms = params.get("HasAcceptedTerms") == current_terms_version;
  training_done = params.get("CompletedTrainingVersion") == current_training_version;

  TermsPage* terms = new TermsPage(this);
  addWidget(terms);
  connect(terms, &TermsPage::acceptedTerms, [=]() {
    Params().put("HasAcceptedTerms", current_terms_version);
    accepted_terms = true;
    updateActiveScreen();
  });
  connect(terms, &TermsPage::declinedTerms, [=]() { setCurrentIndex(2); });

  TrainingGuide* tr = new TrainingGuide(this);
  addWidget(tr);
  connect(tr, &TrainingGuide::completedTraining, [=]() {
    training_done = true;
    Params().put("CompletedTrainingVersion", current_training_version);
    updateActiveScreen();
  });

  DeclinePage* declinePage = new DeclinePage(this);
  addWidget(declinePage);
  connect(declinePage, &DeclinePage::getBack, [=]() { updateActiveScreen(); });

  setStyleSheet(R"(
    * {
      color: white;
      background-color: black;
    }
    QPushButton {
      height: 160px;
      font-size: 55px;
      font-weight: 400;
      border-radius: 10px;
      background-color: #4F4F4F;
    }
  )");
  updateActiveScreen();
}