/**
 * @file Image.cpp
 * @author apio (cloudapio.eu)
 * @brief TGA image loading and rendering.
 *
 * @copyright Copyright (c) 2023, the Luna authors.
 *
 */

#include <os/File.h>
#include <ui/Alignment.h>
#include <ui/Image.h>

namespace ui
{
    Result<SharedPtr<Image>> Image::load(const os::Path& path)
    {
        auto image = TRY(make_shared<Image>());
        auto file = TRY(os::File::open(path, os::File::ReadOnly));

        TRY(file->read_typed(image->m_tga_header));

        if (image->m_tga_header.encoding != 2) todo();
        if (image->m_tga_header.bpp != 32) todo();

        Buffer image_id;
        TRY(file->read(image_id, image->m_tga_header.idlen));

        TRY(file->read(image->m_image_data,
                       image->m_tga_header.w * image->m_tga_header.h * (image->m_tga_header.bpp / 8)));

        return image;
    }

    Result<OwnedPtr<ImageWidget>> ImageWidget::load(const os::Path& path)
    {
        auto widget = TRY(make_owned<ImageWidget>());
        widget->m_image = TRY(Image::load(path));
        widget->m_rect = { 0, 0, widget->m_image->width(), widget->m_image->height() };
        return widget;
    }

    Result<void> ImageWidget::draw(Canvas& canvas)
    {
        canvas.subcanvas({ 0, 0, m_image->width(), m_image->height() }).fill(m_image->pixels(), m_image->width());
        return {};
    }
}