#include "world_view.h"

WorldView::WorldView() : view(nullptr), hasViewChanged(false)
{
}

WorldView::~WorldView()
{
    delete view;
}

void WorldView::draw(sf::RenderWindow *window) const
{
}

void WorldView::update(Game *game)
{
    // Initialize if necessary
    if (view == nullptr)
    {
        initializeView(game);
    }

    // Update size
    setSize(game->window->getSize());

    // Update position
    moveViewByControls();

    // Update window if necessary
    if (hasViewChanged)
    {
        game->window->setView(*this->view);
        hasViewChanged = false;
    }
}

void WorldView::initializeView(Game *game)
{
    auto center = game->window->getView().getCenter();
    auto size = game->window->getView().getSize();
    view = new sf::View(center, size);
}

void WorldView::setSize(sf::Vector2u windowSize)
{
    sf::Vector2f viewSize = sf::Vector2f(windowSize.x, windowSize.y);
    view->setSize(viewSize);
    hasViewChanged = true;
}

void WorldView::moveViewByControls()
{
    auto moveDirection = InputMapper::getInputDirection();
    if (moveDirection == InputDirection::NONE)
    {
        return;
    }

    float stepSize = 100.0f * FRAME_TIME.asSeconds();
    auto delta = stepSize * Direction::getVector(moveDirection);
    this->view->move(delta);
    hasViewChanged = true;
}