#include <memory>

#include <SFML/Graphics.hpp>
#include <SFML/Graphics/CircleShape.hpp>

#include "Bubble.h"

Bubble::Bubble(
    const unsigned int INITIAL_X,
    const unsigned int INITIAL_Y,
    const double INITIAL_X_DIR,
    const double INITIAL_Y_DIR,
    const float RADIUS,
    const sf::Color COLOR,
    std::shared_ptr<sf::Music> BOING_SOUND
): _pBoingSound(std::move(BOING_SOUND)) {
    _circleShape = sf::CircleShape(RADIUS);
    _circleShape.setPosition(INITIAL_X, INITIAL_Y);
    _circleShape.setFillColor(COLOR);
    _xDir = INITIAL_X_DIR;
    _yDir = INITIAL_Y_DIR;
}

void Bubble::draw(sf::RenderWindow& window) const {
    window.draw(_circleShape);
}

void Bubble::updatePosition(const unsigned int WINDOW_WIDTH, const unsigned int WINDOW_HEIGHT) {
    sf::Vector2f currentPosition = _circleShape.getPosition();

    // While inverting sign of the direction is simpler, that method gets bubbles stuck on the wall
    // Giving explicit sign forces the ball in the correct direction instead.
    
    if (
        (currentPosition.x < 0 && _xDir < 0)
        || (
            (currentPosition.x + _circleShape.getRadius() * 2) > WINDOW_WIDTH
            && _xDir > 0
        )
    ) {
        // If over left wall & going left, invert
        // OR if over right wall & going right, invert
        _xDir = -_xDir;
        _pBoingSound->play();
    }

    if (
        (currentPosition.y < 0 && _yDir < 0)
        || (
            (currentPosition.y + _circleShape.getRadius() * 2) > WINDOW_HEIGHT
            && _yDir > 0
        )
    ) {
        // If over top wall & going up, invert
        // OR if over bottom wall & going down, invert
        _yDir = -_yDir;
        _pBoingSound->play();
    }

    currentPosition.x += _xDir;
    currentPosition.y += _yDir;
    _circleShape.setPosition(currentPosition);
}