#include "ui/SlideOutPanel.hpp"
#include "colors.hpp"
#include "config.hpp"
#include <cmath>

ui::SlideOutPanel::SlideOutPanel(int width, Side side)
    : m_x(side == Side::Left ? -width : 1280), m_width(width), m_targetX(side == Side::Left ? 0 : 1280 - m_width),
      m_side(side)
{
    static int slidePanelTargetID = 0;
    std::string panelTargetName = "PanelTarget_" + std::to_string(slidePanelTargetID++);
    m_renderTarget = sdl::TextureManager::create_load_texture(panelTargetName,
                                                              width,
                                                              720,
                                                              SDL_TEXTUREACCESS_STATIC | SDL_TEXTUREACCESS_TARGET);
}

void ui::SlideOutPanel::update(bool hasFocus)
{
    double scaling = config::get_animation_scaling();

    // The first two conditions are just a workaround because my math keeps leaving two pixels.
    if (!m_isOpen && m_side == Side::Left && m_x >= -4)
    {
        m_x = 0;
        m_isOpen = true;
    }
    else if (!m_isOpen && m_side == Side::Right && m_x - m_targetX <= 4)
    {
        m_x = 1280 - m_width;
        m_isOpen = true;
    }
    else if (!m_isOpen && m_side == Side::Left && m_x != m_targetX)
    {
        m_x -= std::ceil(m_x / scaling);
    }
    else if (!m_isOpen && m_side == Side::Right && m_x != m_targetX)
    {
        m_x += std::ceil((1280.0f - (static_cast<double>(m_width)) - m_x) / scaling);
    }

    // I'm going to leave it to the individual elements whether they update if the state is active.
    if (m_isOpen)
    {
        for (auto &currentElement : m_elements)
        {
            currentElement->update(hasFocus);
        }
    }
}

void ui::SlideOutPanel::render(SDL_Texture *Target, bool hasFocus)
{
    for (auto &currentElement : m_elements)
    {
        currentElement->render(m_renderTarget->get(), hasFocus);
    }

    m_renderTarget->render(NULL, m_x, 0);
}

void ui::SlideOutPanel::clear_target()
{
    m_renderTarget->clear(colors::SLIDE_PANEL_CLEAR);
}

void ui::SlideOutPanel::reset()
{
    m_x = m_side == Side::Left ? -(m_width) : 1280.0f;
    m_isOpen = false;
    m_closePanel = false;
}

void ui::SlideOutPanel::close()
{
    m_closePanel = true;
}

bool ui::SlideOutPanel::is_open() const
{
    return m_isOpen;
}

bool ui::SlideOutPanel::is_closed() const
{
    return m_closePanel && (m_side == Side::Left ? m_x > -(m_width) : m_x < 1280);
}

void ui::SlideOutPanel::push_new_element(std::shared_ptr<ui::Element> newElement)
{
    m_elements.push_back(newElement);
}

void ui::SlideOutPanel::clear_elements()
{
    m_elements.clear();
}

SDL_Texture *ui::SlideOutPanel::get_target()
{
    return m_renderTarget->get();
}