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//Own

#include "boat.h"

#include "boat_p.h"

#include "bomb.h"

#include "pixmapitem.h"

#include "graphicsscene.h"

#include "animationmanager.h"

#include "qanimationstate.h"

//Qt

#include <QtCore/QPropertyAnimation>

#include <QtCore/QStateMachine>

#include <QtCore/QHistoryState>

#include <QtCore/QFinalState>

#include <QtCore/QState>

#include <QtCore/QSequentialAnimationGroup>

static QAbstractAnimation *setupDestroyAnimation(Boat *boat)

{

    QSequentialAnimationGroup *group = new QSequentialAnimationGroup(boat);

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

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

        step->setZValue(6);

        step->setOpacity(0);

        //fade-in

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

        anim->setEndValue(1);

        anim->setDuration(100);

        group->insertAnimation(i-1, anim);

        //and then fade-out

        QPropertyAnimation *anim2 = new QPropertyAnimation(step, "opacity");

        anim2->setEndValue(0);

        anim2->setDuration(100);

        group->addAnimation(anim2);

    }

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

    return group;

}

Boat::Boat() : PixmapItem(QString("boat"), GraphicsScene::Big),

    speed(0), bombsAlreadyLaunched(0), direction(Boat::None), movementAnimation(0)

{

    setZValue(4);

    setFlags(QGraphicsItem::ItemIsFocusable);

    //The movement animation used to animate the boat

    movementAnimation = new QPropertyAnimation(this, "pos");

    //The destroy animation used to explode the boat

    destroyAnimation = setupDestroyAnimation(this);

    //We setup the state machine of the boat

    machine = new QStateMachine(this);

    QState *moving = new QState(machine);

    StopState *stopState = new StopState(this, moving);

    machine->setInitialState(moving);

    moving->setInitialState(stopState);

    MoveStateRight *moveStateRight = new MoveStateRight(this, moving);

    MoveStateLeft *moveStateLeft = new MoveStateLeft(this, moving);

    LaunchStateRight *launchStateRight = new LaunchStateRight(this, machine);

    LaunchStateLeft *launchStateLeft = new LaunchStateLeft(this, machine);

    //then setup the transitions for the rightMove state

    KeyStopTransition *leftStopRight = new KeyStopTransition(this, QEvent::KeyPress, Qt::Key_Left);

    leftStopRight->setTargetState(stopState);

    KeyMoveTransition *leftMoveRight = new KeyMoveTransition(this, QEvent::KeyPress, Qt::Key_Left);

    leftMoveRight->setTargetState(moveStateRight);

    KeyMoveTransition *rightMoveRight = new KeyMoveTransition(this, QEvent::KeyPress, Qt::Key_Right);

    rightMoveRight->setTargetState(moveStateRight);

    KeyMoveTransition *rightMoveStop = new KeyMoveTransition(this, QEvent::KeyPress, Qt::Key_Right);

    rightMoveStop->setTargetState(moveStateRight);

    //then setup the transitions for the leftMove state

    KeyStopTransition *rightStopLeft = new KeyStopTransition(this, QEvent::KeyPress, Qt::Key_Right);

    rightStopLeft->setTargetState(stopState);

    KeyMoveTransition *rightMoveLeft = new KeyMoveTransition(this, QEvent::KeyPress, Qt::Key_Right);

    rightMoveLeft->setTargetState(moveStateLeft);

    KeyMoveTransition *leftMoveLeft = new KeyMoveTransition(this, QEvent::KeyPress,Qt::Key_Left);

    leftMoveLeft->setTargetState(moveStateLeft);

    KeyMoveTransition *leftMoveStop = new KeyMoveTransition(this, QEvent::KeyPress,Qt::Key_Left);

    leftMoveStop->setTargetState(moveStateLeft);

    //We set up the right move state

    moveStateRight->addTransition(leftStopRight);

    moveStateRight->addTransition(leftMoveRight);

    moveStateRight->addTransition(rightMoveRight);

    stopState->addTransition(rightMoveStop);

    //We set up the left move state

    moveStateLeft->addTransition(rightStopLeft);

    moveStateLeft->addTransition(leftMoveLeft);

    moveStateLeft->addTransition(rightMoveLeft);

    stopState->addTransition(leftMoveStop);

    //The animation is finished, it means we reached the border of the screen, the boat is stopped so we move to the stop state

    moveStateLeft->addTransition(movementAnimation, SIGNAL(finished()), stopState);

    moveStateRight->addTransition(movementAnimation, SIGNAL(finished()), stopState);

    //We set up the keys for dropping bombs

    KeyLaunchTransition *upFireLeft = new KeyLaunchTransition(this, QEvent::KeyPress, Qt::Key_Up);

    upFireLeft->setTargetState(launchStateRight);

    KeyLaunchTransition *upFireRight = new KeyLaunchTransition(this, QEvent::KeyPress, Qt::Key_Up);

    upFireRight->setTargetState(launchStateRight);

    KeyLaunchTransition *upFireStop = new KeyLaunchTransition(this, QEvent::KeyPress, Qt::Key_Up);

    upFireStop->setTargetState(launchStateRight);

    KeyLaunchTransition *downFireLeft = new KeyLaunchTransition(this, QEvent::KeyPress, Qt::Key_Down);

    downFireLeft->setTargetState(launchStateLeft);

    KeyLaunchTransition *downFireRight = new KeyLaunchTransition(this, QEvent::KeyPress, Qt::Key_Down);

    downFireRight->setTargetState(launchStateLeft);

    KeyLaunchTransition *downFireMove = new KeyLaunchTransition(this, QEvent::KeyPress, Qt::Key_Down);

    downFireMove->setTargetState(launchStateLeft);

    //We set up transitions for fire up

    moveStateRight->addTransition(upFireRight);

    moveStateLeft->addTransition(upFireLeft);

    stopState->addTransition(upFireStop);

    //We set up transitions for fire down

    moveStateRight->addTransition(downFireRight);

    moveStateLeft->addTransition(downFireLeft);

    stopState->addTransition(downFireMove);

    //Finally the launch state should come back to its original state

    QHistoryState *historyState = new QHistoryState(moving);

    launchStateLeft->addTransition(historyState);

    launchStateRight->addTransition(historyState);

    QFinalState *final = new QFinalState(machine);

    //This state play the destroyed animation

    QAnimationState *destroyedState = new QAnimationState(machine);

    destroyedState->setAnimation(destroyAnimation);

    //Play a nice animation when the boat is destroyed

    moving->addTransition(this, SIGNAL(boatDestroyed()), 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 boat is dead

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

}

void Boat::run()

{

    //We register animations

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

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

    machine->start();

}

void Boat::stop()

{

    movementAnimation->stop();

    machine->stop();

}

void Boat::updateBoatMovement()

{

    if (speed == 0 || direction == Boat::None) {

        movementAnimation->stop();

        return;

    }

    movementAnimation->stop();

    if (direction == Boat::Left) {

        movementAnimation->setEndValue(QPointF(0,y()));

        movementAnimation->setDuration(x()/speed*15);

    }

    else /*if (direction == Boat::Right)*/ {

        movementAnimation->setEndValue(QPointF(scene()->width()-size().width(),y()));

        movementAnimation->setDuration((scene()->width()-size().width()-x())/speed*15);

    }

    movementAnimation->start();

}

void Boat::destroy()

{

    movementAnimation->stop();

    emit boatDestroyed();

}

int Boat::bombsLaunched() const

{

    return bombsAlreadyLaunched;

}

void Boat::setBombsLaunched(int number)

{

    if (number > MAX_BOMB) {

        qWarning("Boat::setBombsLaunched : It impossible to launch that number of bombs");

        return;

    }

    bombsAlreadyLaunched = number;

}

int Boat::currentSpeed() const

{

    return speed;

}

void Boat::setCurrentSpeed(int speed)

{

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

        qWarning("Boat::setCurrentSpeed: The boat can't run on that speed");

        return;

    }

    this->speed = speed;

}

enum Boat::Movement Boat::currentDirection() const

{

    return direction;

}

void Boat::setCurrentDirection(Movement direction)

{

    this->direction = direction;

}

int Boat::type() const

{

    return Type;

}