#include "mainwidget.h"
#include "actor.h"
#include "block.h"
#include "bonuspoint.h"
#include "point.h"
#include "constants.h"
#include "audioplayer.h"

// temporary
Transmission::map_t createDummyMap()
{
  Transmission::map_t map;
  map = new Transmission::field_t*[Constants::map_size.width];
  for (unsigned int i = 0; i < Constants::map_size.width; ++i)
    map[i] = new Transmission::field_t[Constants::map_size.height];

  for (unsigned int x = 0; x < Constants::map_size.width; ++x)
  {
    for (unsigned int y = 0; y < Constants::map_size.height; ++y)
    {
      Transmission::field_t &cur = map[x][y];
      cur = Transmission::none;
    }
  }


  const char *tmpl[] = {
    "             #      #              ",
    " #### ###### # #### # # ###### ### ",
    "             #               #     ",
    " # ##### # #   #   # # ### #   # # ",
    " #   #   # # # # # # # #   ##  # # ",
    " #   #   # #   # # # # ### # # # # ",
    " # # # # # # # #   # # #   #  ## # ",
    " #   #   ###   ##### # ### #   # # ",
    " ###                             # ",
    " #    # ### #### #### #### #####   ",
    "   #### #   #..# #..# #..#   #   # ",
    " # #    ### #..# #..# #### # # # # ",
    " #    # #   #..# #..# #          # ",
    " # #### #   #### #### #  # ##### # ",
    "          #              #         ",
    " #### ###### # ##### # ####### ### ",
    "             #       #             "
  };

  for (unsigned int x = 0; x < Constants::map_size.width; ++x)
  {
    for (unsigned int y = 0; y < Constants::map_size.height; ++y)
    {
      Transmission::field_t &cur = map[x][y];
      cur = Transmission::none;
      if (tmpl[y][x] == '#')
        cur |= Color::none | Transmission::block;
      /* this is a simple hack to create areas where no
       * autoplaced points will be placed (see below)
       */
      else if (tmpl[y][x] == '.')
        cur |= Transmission::point;
    }
  }

  map[0][0] |= Transmission::bonuspoint;
  map[1][0] |= Color::red   | Transmission::pacman | Transmission::direction_right;
  map[2][0] |= Color::blue  | Transmission::pacman | Transmission::direction_up;
  map[3][0] |= Color::green | Transmission::pacman | Transmission::direction_down;

  /* auto place normal points*/
  for (unsigned int x = 0; x < Constants::map_size.width; ++x)
  {
    for (unsigned int y = 0; y < Constants::map_size.height; ++y)
    {
      Transmission::field_t &cur = map[x][y];
      if (cur == Transmission::none)
        cur |= Transmission::point;
      else if (cur == Transmission::point)
        cur = Transmission::none;
    }
  }

  return map;
}

MainWidget::MainWidget()
  : m_currentKey(0), m_running(false)
{
  visualMap.resize(Constants::map_size.width);
  for (int i=0; i<visualMap.size(); ++i) {
    visualMap[i].resize(Constants::map_size.height);
  }

  createGui();
  updateMap(createDummyMap());

  //connect(AudioPlayer::self(), SIGNAL(finished()), this, SLOT(startGame()));
  //AudioPlayer::self()->play(AudioPlayer::Intro);

  QTimer *timer = new QTimer(this);
  connect(timer, SIGNAL(timeout()), this, SLOT(tick()));
  timer->start(100);

  startGame();
}

void MainWidget::createGui()
{
  setFocusPolicy(Qt::StrongFocus);

  QVBoxLayout *layout = new QVBoxLayout(this);
  QHBoxLayout *scoreLayout = new QHBoxLayout();

  for (unsigned int i = 1; i < 4; ++i)
  {
    QGroupBox *scoreBox = new QGroupBox(QString("Spieler %1").arg(i), this);
    scoreBox->setObjectName(QString("actor%1").arg(i));
    scoreBox->setCheckable(true);
    connect(scoreBox, SIGNAL(clicked()), this, SLOT(playerScoreClicked()));
    scoreLayout->addWidget(scoreBox);

    QGridLayout *playerLayout = new QGridLayout();
    scoreBox->setLayout(playerLayout);

    playerLayout->addWidget(new QLabel("Rundenpunkte:", this), 0, 0);
    playerLayout->addWidget(new QLabel("Gesamtpunkte:", this), 1, 0);

    playerLayout->addWidget(new QLabel("", this), 0, 1);
    playerLayout->addWidget(new QLabel("", this), 1, 1);

    m_playerScoreLayouts.append(playerLayout);
  }

  m_scene = new QGraphicsScene(0, 0, Constants::map_size_pixel.width, Constants::map_size_pixel.height, this);
  m_scene->setBackgroundBrush(Qt::black);

  QGraphicsView *window = new QGraphicsView(m_scene, this);
  window->setFrameStyle(0);
  window->setAlignment(Qt::AlignLeft | Qt::AlignTop);
  window->setFixedSize(Constants::map_size_pixel.width, Constants::map_size_pixel.height);
  window->setWindowFlags(window->windowFlags() & ~Qt::WindowMaximizeButtonHint);

  layout->addLayout(scoreLayout);
  layout->addWidget(window);

  QFile css(":/stylesheet");
  css.open(QFile::ReadOnly);
  qApp->setStyleSheet(QLatin1String(css.readAll()));

  setLayout(layout);
}

void MainWidget::updateScore()
{
  QMapIterator<Color::Color, Actor*> i(m_actors);
  while (i.hasNext())
  {
    i.next();
    if (i.key() > Color::max)
    {
      /* player #4 isn't supported in score */
      Q_ASSERT(false);
      continue;
    }
    int id = (i.key() >> 1);
    QLabel *turnPointsLbl =
      dynamic_cast<QLabel*>(m_playerScoreLayouts.at(id)->itemAtPosition(0,1)->widget());
    QLabel *allPointsLbl =
      dynamic_cast<QLabel*>(m_playerScoreLayouts.at(id)->itemAtPosition(1,1)->widget());
    turnPointsLbl->setText(QString::number(id));
    allPointsLbl->setText(QString::number(id));
  }
}

void MainWidget::updateMap(const Transmission::map_t& map)
{
  for (unsigned int x = 0; x < Constants::map_size.width; ++x)
  {
    for (unsigned int y = 0; y < Constants::map_size.height; ++y)
    {
      const Transmission::field_t &cur = map[x][y];
      if (cur == Transmission::none)
        continue;
      //qDebug() << "not 0 at x=" << x << ", y=" << y << ", val=" << cur;

      Color::Color color = static_cast<Color::Color>(cur & Transmission::color_mask);
      //qDebug() << "col=" << color;

      PixmapItem* item = NULL;
      if (cur & Transmission::block)
      {
        unsigned int neighbours = Block::None;
        // check left side
        if (x > 0 && map[x - 1][y] & Transmission::block)
          neighbours |= Block::Left;
        // check right side
        if (x < Constants::map_size.width && map[x + 1][y] & Transmission::block)
          neighbours |= Block::Right;
        // check upside
        if (y > 0 && map[x][y - 1] & Transmission::block)
          neighbours |= Block::Up;
        // check down side
        if (y < Constants::map_size.height && map[x][y + 1] & Transmission::block)
          neighbours |= Block::Down;
        item = new Block(color, neighbours);
      }
      else if (cur & Transmission::bonuspoint)
        item = new BonusPoint();
      else if (cur & Transmission::point)
        item = new Point();
      else if (cur & Transmission::pacman)
      {
        Actor *actor = m_actors.value(color, NULL);
        if (actor == NULL)
        {
          //qDebug() << "new actor of col" << color;
          actor = new Actor(color, (color == Color::red)); //TODO: red = local for testing
          m_actors[color] = actor;
          m_scene->addItem(actor);
          actor->setPos(mapPositionToCoord(x, y));
        }

        Actor::Movement direction = Actor::None;
        switch (cur & Transmission::direction_mask)
        {
        case Transmission::direction_none:
          direction = Actor::None;
          break;
        case Transmission::direction_left:
          direction = Actor::Left;
          break;
        case Transmission::direction_right:
          direction = Actor::Right;
          break;
        case Transmission::direction_up:
          direction = Actor::Up;
          break;
        case Transmission::direction_down:
          direction = Actor::Down;
          break;
        default:
          Q_ASSERT(false);
        }
        //actor->move(direction, mapPositionToCoord(x, y));
      }
      else
        Q_ASSERT(false);

      if (item != NULL)
      {
        m_scene->addItem(item);
        item->setPos(mapPositionToCoord(x, y));
        PixmapItem* oldItem = visualMap[x][y];
        visualMap[x][y] = item;
        if (oldItem != NULL)
        {
          m_scene->removeItem(item);
          delete oldItem;
        }
      }
    }
  }

  updateScore();
}

QPoint MainWidget::mapPositionToCoord(unsigned int x, unsigned int y)
{
  return QPoint(x * Constants::field_size.width, y * Constants::field_size.height);
}

Transmission::field_t MainWidget::translateKey(int key)
{
  switch(key)
  {
  case Qt::Key_W:
  case Qt::Key_Up:
    return Transmission::direction_up;
    break;
  case Qt::Key_S:
  case Qt::Key_Down:
    return Transmission::direction_down;
    break;
  case Qt::Key_A:
  case Qt::Key_Left:
    return Transmission::direction_left;
    break;
  case Qt::Key_D:
  case Qt::Key_Right:
    return Transmission::direction_right;
    break;
  default:
    return 0;
  }
}

void MainWidget::tick()
{
  Actor::Movement mov = Actor::None;
  switch(m_currentKey)
  {
    case Transmission::direction_up:
      mov = Actor::Up;
      break;
    case Transmission::direction_down:
      mov = Actor::Down;
      break;
    case Transmission::direction_left:
      mov = Actor::Left;
      break;
    case Transmission::direction_right:
      mov = Actor::Right;
      break;
    default:
      break;
  }

  QMapIterator<Color::Color, Actor*> i(m_actors);
  while (i.hasNext())
  {
    i.next();
    i.value()->move(mov);
  }
}


void MainWidget::keyPressEvent(QKeyEvent* event)
{
  if (!m_running)
    return;

  QWidget::keyPressEvent(event);
  m_currentKey = translateKey(event->key());

  return;

  // test stuff
  Actor::Movement mov = Actor::None;
  switch(m_currentKey)
  {
  case Transmission::direction_up:
    mov = Actor::Up;
    break;
  case Transmission::direction_down:
    mov = Actor::Down;
    break;
  case Transmission::direction_left:
    mov = Actor::Left;
    break;
  case Transmission::direction_right:
    mov = Actor::Right;
    break;
  default:
    break;
  }

  QMapIterator<Color::Color, Actor*> i(m_actors);
  while (i.hasNext())
  {
    i.next();
    i.value()->move(mov);
  }
}

void MainWidget::keyReleaseEvent(QKeyEvent* event)
{
  if (!m_running)
    return;

  QWidget::keyReleaseEvent(event);
  Transmission::field_t releasedKey = translateKey(event->key());
  if (releasedKey == m_currentKey)
  {
    // current key got released
    // if this is false, a key got released which has already
    // been replaced by a different key, so this case is disregarded
    m_currentKey = Transmission::direction_none;
  }
}

void MainWidget::startGame()
{
  m_running = true;
}

void MainWidget::playerScoreClicked()
{
  QGroupBox *tmp = qobject_cast<QGroupBox *>(sender());
  tmp->setChecked(true);
  return;
}