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//Own

#include "graphicsscene.h"

#include "states.h"

#include "boat.h"

#include "submarine.h"

#include "torpedo.h"

#include "bomb.h"

#include "pixmapitem.h"

#include "animationmanager.h"

#include "qanimationstate.h"

#include "progressitem.h"

#include "textinformationitem.h"

//Qt

#include <QtCore/QPropertyAnimation>

#include <QtCore/QSequentialAnimationGroup>

#include <QtCore/QParallelAnimationGroup>

#include <QtCore/QStateMachine>

#include <QtCore/QFinalState>

#include <QtCore/QPauseAnimation>

#include <QtGui/QAction>

#include <QtCore/QDir>

#include <QtGui/QApplication>

#include <QtGui/QMessageBox>

#include <QtGui/QGraphicsView>

#include <QtGui/QGraphicsSceneMouseEvent>

#include <QtCore/QXmlStreamReader>

GraphicsScene::GraphicsScene(int x, int y, int width, int height, Mode mode)

    : QGraphicsScene(x , y, width, height), mode(mode), boat(new Boat)

{

    PixmapItem *backgroundItem = new PixmapItem(QString("background"),mode);

    backgroundItem->setZValue(1);

    backgroundItem->setPos(0,0);

    addItem(backgroundItem);

    PixmapItem *surfaceItem = new PixmapItem(QString("surface"),mode);

    surfaceItem->setZValue(3);

    surfaceItem->setPos(0,sealLevel() - surfaceItem->boundingRect().height()/2);

    addItem(surfaceItem);

    //The item that display score and level

    progressItem = new ProgressItem(backgroundItem);

    textInformationItem = new TextInformationItem(backgroundItem);

    textInformationItem->hide();

    //We create the boat

    addItem(boat);

    boat->setPos(this->width()/2, sealLevel() - boat->size().height());

    boat->hide();

    //parse the xml that contain all data of the game

    QXmlStreamReader reader;

    QFile file(":data.xml");

    file.open(QIODevice::ReadOnly);

    reader.setDevice(&file);

    LevelDescription currentLevel;

    while (!reader.atEnd()) {

         reader.readNext();

         if (reader.tokenType() == QXmlStreamReader::StartElement) {

             if (reader.name() == "submarine") {

                 SubmarineDescription desc;

                 desc.name = reader.attributes().value("name").toString();

                 desc.points = reader.attributes().value("points").toString().toInt();

                 desc.type = reader.attributes().value("type").toString().toInt();

                 submarinesData.append(desc);

             } else if (reader.name() == "level") {

                 currentLevel.id = reader.attributes().value("id").toString().toInt();

                 currentLevel.name = reader.attributes().value("name").toString();

             } else if (reader.name() == "subinstance") {

                 currentLevel.submarines.append(qMakePair(reader.attributes().value("type").toString().toInt(), reader.attributes().value("nb").toString().toInt()));

             }

         } else if (reader.tokenType() == QXmlStreamReader::EndElement) {

            if (reader.name() == "level") {

                levelsData.insert(currentLevel.id, currentLevel);

                currentLevel.submarines.clear();

            }

         }

   }

}

qreal GraphicsScene::sealLevel() const

{

    return (mode == Big) ? 220 : 160;

}

void GraphicsScene::setupScene(QAction *newAction, QAction *quitAction)

{

    static const int nLetters = 10;

    static struct {

        char const *pix;

        qreal initX, initY;

        qreal destX, destY;

    } logoData[nLetters] = {

        {"s",   -1000, -1000, 300, 150 },

        {"u",    -800, -1000, 350, 150 },

        {"b",    -600, -1000, 400, 120 },

        {"dash", -400, -1000, 460, 150 },

        {"a",    1000,  2000, 350, 250 },

        {"t",     800,  2000, 400, 250 },

        {"t2",    600,  2000, 430, 250 },

        {"a2",    400,  2000, 465, 250 },

        {"q",     200,  2000, 510, 250 },

        {"excl",    0,  2000, 570, 220 } };

    QSequentialAnimationGroup * lettersGroupMoving = new QSequentialAnimationGroup(this);

    QParallelAnimationGroup * lettersGroupFading = new QParallelAnimationGroup(this);

    for (int i = 0; i < nLetters; ++i) {

        PixmapItem *logo = new PixmapItem(QLatin1String(":/logo-") + logoData[i].pix, this);

        logo->setPos(logoData[i].initX, logoData[i].initY);

        logo->setZValue(i + 3);

        //creation of the animations for moving letters

        QPropertyAnimation *moveAnim = new QPropertyAnimation(logo, "pos", lettersGroupMoving);

        moveAnim->setEndValue(QPointF(logoData[i].destX, logoData[i].destY));

        moveAnim->setDuration(200);

        moveAnim->setEasingCurve(QEasingCurve::OutElastic);

        lettersGroupMoving->addPause(50);

        //creation of the animations for fading out the letters

        QPropertyAnimation *fadeAnim = new QPropertyAnimation(logo, "opacity", lettersGroupFading);

        fadeAnim->setDuration(800);

        fadeAnim->setEndValue(0);

        fadeAnim->setEasingCurve(QEasingCurve::OutQuad);

    }

    QStateMachine *machine = new QStateMachine(this);

    //This state is when the player is playing

    PlayState *gameState = new PlayState(this, machine);

    //Final state

    QFinalState *final = new QFinalState(machine);

    //Animation when the player enter in the game

    QAnimationState *lettersMovingState = new QAnimationState(machine);

    lettersMovingState->setAnimation(lettersGroupMoving);

    //Animation when the welcome screen disappear

    QAnimationState *lettersFadingState = new QAnimationState(machine);

    lettersFadingState->setAnimation(lettersGroupFading);

    //if new game then we fade out the welcome screen and start playing

    lettersMovingState->addTransition(newAction, SIGNAL(triggered()), lettersFadingState);

    lettersFadingState->addTransition(lettersFadingState, SIGNAL(animationFinished()), gameState);

    //New Game is triggered then player start playing

    gameState->addTransition(newAction, SIGNAL(triggered()), gameState);

    //Wanna quit, then connect to CTRL+Q

    gameState->addTransition(quitAction, SIGNAL(triggered()), final);

    lettersMovingState->addTransition(quitAction, SIGNAL(triggered()), final);

    //Welcome screen is the initial state

    machine->setInitialState(lettersMovingState);

    machine->start();

    //We reach the final state, then we quit

    connect(machine, SIGNAL(finished()), qApp, SLOT(quit()));

}

void GraphicsScene::addItem(Bomb *bomb)

{

    bombs.insert(bomb);

    connect(bomb,SIGNAL(bombExecutionFinished()),this, SLOT(onBombExecutionFinished()));

    QGraphicsScene::addItem(bomb);

}

void GraphicsScene::addItem(Torpedo *torpedo)

{

    torpedos.insert(torpedo);

    connect(torpedo,SIGNAL(torpedoExecutionFinished()),this, SLOT(onTorpedoExecutionFinished()));

    QGraphicsScene::addItem(torpedo);

}

void GraphicsScene::addItem(SubMarine *submarine)

{

    submarines.insert(submarine);

    connect(submarine,SIGNAL(subMarineExecutionFinished()),this, SLOT(onSubMarineExecutionFinished()));

    QGraphicsScene::addItem(submarine);

}

void GraphicsScene::addItem(QGraphicsItem *item)

{

    QGraphicsScene::addItem(item);

}

void GraphicsScene::onBombExecutionFinished()

{

    Bomb *bomb = qobject_cast<Bomb *>(sender());

    bombs.remove(bomb);

    bomb->deleteLater();

    if (boat)

        boat->setBombsLaunched(boat->bombsLaunched() - 1);

}

void GraphicsScene::onTorpedoExecutionFinished()

{

    Torpedo *torpedo = qobject_cast<Torpedo *>(sender());

    torpedos.remove(torpedo);

    torpedo->deleteLater();

}

void GraphicsScene::onSubMarineExecutionFinished()

{

    SubMarine *submarine = qobject_cast<SubMarine *>(sender());

    submarines.remove(submarine);

    if (submarines.count() == 0)

        emit allSubMarineDestroyed(submarine->points());

    else

        emit subMarineDestroyed(submarine->points());

    submarine->deleteLater();

}

void GraphicsScene::clearScene()

{

    foreach (SubMarine *sub, submarines) {

        sub->destroy();

        sub->deleteLater();

    }

    foreach (Torpedo *torpedo, torpedos) {

        torpedo->destroy();

        torpedo->deleteLater();

    }

    foreach (Bomb *bomb, bombs) {

        bomb->destroy();

        bomb->deleteLater();

    }

    submarines.clear();

    bombs.clear();

    torpedos.clear();

    AnimationManager::self()->unregisterAllAnimations();

    boat->stop();

    boat->hide();

    boat->setEnabled(true);

}