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//Own

#include "submarine.h"

#include "submarine_p.h"

#include "torpedo.h"

#include "pixmapitem.h"

#include "graphicsscene.h"

#include "animationmanager.h"

#include "qanimationstate.h"

#include <QtCore/QPropertyAnimation>

#include <QtCore/QStateMachine>

#include <QtCore/QFinalState>

#include <QtCore/QSequentialAnimationGroup>

static QAbstractAnimation *setupDestroyAnimation(SubMarine *sub)

{

    QSequentialAnimationGroup *group = new QSequentialAnimationGroup(sub);

    for (int i = 1; i <= 4; ++i) {

        PixmapItem *step = new PixmapItem(QString::fromLatin1("explosion/submarine/step%1").arg(i), GraphicsScene::Big, sub);

        step->setZValue(6);

        step->setOpacity(0);

        QPropertyAnimation *anim = new QPropertyAnimation(step, "opacity", group);

        anim->setDuration(100);

        anim->setEndValue(1);

    }

    AnimationManager::self()->registerAnimation(group);

    return group;

}

SubMarine::SubMarine(int type, const QString &name, int points) : PixmapItem(QString("submarine"), GraphicsScene::Big),

    subType(type), subName(name), subPoints(points), speed(0), direction(SubMarine::None)

{

    setZValue(5);

    setTransformOriginPoint(boundingRect().center());

    graphicsRotation = new QGraphicsRotation(this);

    graphicsRotation->setAxis(Qt::YAxis);

    graphicsRotation->setOrigin(QVector3D(size().width()/2, size().height()/2, 0));

    QList<QGraphicsTransform *> r;

    r.append(graphicsRotation);

    setTransformations(r);

    //We setup the state machine of the submarine

    QStateMachine *machine = new QStateMachine(this);

    //This state is when the boat is moving/rotating

    QState *moving = new QState(machine);

    //This state is when the boat is moving from left to right

    MovementState *movement = new MovementState(this, moving);

    //This state is when the boat is moving from left to right

    ReturnState *rotation = new ReturnState(this, moving);

    //This is the initial state of the moving root state

    moving->setInitialState(movement);

    movement->addTransition(this, SIGNAL(subMarineStateChanged()), moving);

    //This is the initial state of the machine

    machine->setInitialState(moving);

    //End

    QFinalState *final = new QFinalState(machine);

    //If the moving animation is finished we move to the return state

    movement->addTransition(movement, SIGNAL(animationFinished()), rotation);

    //If the return animation is finished we move to the moving state

    rotation->addTransition(rotation, SIGNAL(animationFinished()), movement);

    //This state play the destroyed animation

    QAnimationState *destroyedState = new QAnimationState(machine);

    destroyedState->setAnimation(setupDestroyAnimation(this));

    //Play a nice animation when the submarine is destroyed

    moving->addTransition(this, SIGNAL(subMarineDestroyed()), destroyedState);

    //Transition to final state when the destroyed animation is finished

    destroyedState->addTransition(destroyedState, SIGNAL(animationFinished()), final);

    //The machine has finished to be executed, then the submarine is dead

    connect(machine,SIGNAL(finished()),this, SIGNAL(subMarineExecutionFinished()));

    machine->start();

}

int SubMarine::points() const

{

    return subPoints;

}

void SubMarine::setCurrentDirection(SubMarine::Movement direction)

{

    if (this->direction == direction)

        return;

    if (direction == SubMarine::Right && this->direction == SubMarine::None) {

          graphicsRotation->setAngle(180);

    }

    this->direction = direction;

}

enum SubMarine::Movement SubMarine::currentDirection() const

{

    return direction;

}

void SubMarine::setCurrentSpeed(int speed)

{

    if (speed < 0 || speed > 3) {

        qWarning("SubMarine::setCurrentSpeed : The speed is invalid");

    }

    this->speed = speed;

    emit subMarineStateChanged();

}

int SubMarine::currentSpeed() const

{

    return speed;

}

void SubMarine::launchTorpedo(int speed)

{

    Torpedo * torp = new Torpedo();

    GraphicsScene *scene = static_cast<GraphicsScene *>(this->scene());

    scene->addItem(torp);

    torp->setPos(pos());

    torp->setCurrentSpeed(speed);

    torp->launch();

}

void SubMarine::destroy()

{

    emit subMarineDestroyed();

}

int SubMarine::type() const

{

    return Type;

}