/*
Crafter®.Graphics
Copyright (C) 2025 Catcrafts®
Catcrafts.net

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3.0 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
*/

module Crafter.Graphics:GridElement_impl;
import :GridElement;
import :Window;
import :Types;
import std;

using namespace Crafter;

GridElement::GridElement(std::uint_fast32_t columns, std::uint_fast32_t rows, 
                         std::int_fast32_t spacingX, std::int_fast32_t spacingY,
                         std::int_fast32_t anchorX, std::int_fast32_t anchorY, 
                         std::uint_fast32_t relativeWidth, std::uint_fast32_t relativeHeight, 
                         std::int_fast32_t anchorOffsetX, std::int_fast32_t anchorOffsetY, 
                         std::int_fast32_t z, bool ignoreScaling) 
    : Transform(anchorX, anchorY, relativeWidth, relativeHeight, anchorOffsetX, anchorOffsetY, z, ignoreScaling),
      columns(columns), rows(rows), spacingX(spacingX), spacingY(spacingY) {

}

void GridElement::SetGridSize(std::uint_fast32_t columns, std::uint_fast32_t rows) {
    this->columns = columns;
    this->rows = rows;
}

void GridElement::SetSpacing(std::int_fast32_t spacingX, std::int_fast32_t spacingY) {
    this->spacingX = spacingX;
    this->spacingY = spacingY;
}

void GridElement::UpdatePosition(Window& window) {
    window.ScaleElement(*this);
    
    // Calculate grid dimensions
    std::int_fast32_t totalWidth = 0;
    std::int_fast32_t totalHeight = 0;
    
    if (columns > 0 && rows > 0) {
        // Calculate the space available for children based on grid size
        std::int_fast32_t cellWidth = (relativeWidth - (columns - 1) * spacingX) / columns;
        std::int_fast32_t cellHeight = (relativeHeight - (rows - 1) * spacingY) / rows;
        
        // Position each child in the grid
        std::size_t childIndex = 0;
        for (std::uint_fast32_t row = 0; row < rows && childIndex < children.size(); ++row) {
            for (std::uint_fast32_t col = 0; col < columns && childIndex < children.size(); ++col) {
                Transform* child = children[childIndex];
                
                // Calculate position for this child
                std::int_fast32_t childX = anchorOffsetX + (cellWidth * col) + (spacingX * col);
                std::int_fast32_t childY = anchorOffsetY + (cellHeight * row) + (spacingY * row);
                
                // Apply relative positioning
                child->anchorX = childX;
                child->anchorY = childY;
                child->relativeWidth = cellWidth;
                child->relativeHeight = cellHeight;
                
                // Update child position
                child->UpdatePosition(window, *this);
                childIndex++;
            }
        }
    }
}

void GridElement::UpdatePosition(Window& window, Transform& parent) {
    window.ScaleElement(*this, parent);
    // Calculate grid dimensions
    std::int_fast32_t totalWidth = 0;
    std::int_fast32_t totalHeight = 0;
    
    if (columns > 0 && rows > 0) {
        // Calculate the space available for children based on grid size
        std::int_fast32_t cellWidth = (relativeWidth - (columns - 1) * spacingX) / columns;
        std::int_fast32_t cellHeight = (relativeHeight - (rows - 1) * spacingY) / rows;
        
        // Position each child in the grid
        std::size_t childIndex = 0;
        for (std::uint_fast32_t row = 0; row < rows && childIndex < children.size(); ++row) {
            for (std::uint_fast32_t col = 0; col < columns && childIndex < children.size(); ++col) {
                Transform* child = children[childIndex];
                
                // Calculate position for this child
                std::int_fast32_t childX = anchorOffsetX + (cellWidth * col) + (spacingX * col);
                std::int_fast32_t childY = anchorOffsetY + (cellHeight * row) + (spacingY * row);
                
                // Apply relative positioning
                child->anchorX = childX;
                child->anchorY = childY;
                child->relativeWidth = cellWidth;
                child->relativeHeight = cellHeight;
                
                // Update child position
                child->UpdatePosition(window, *this);
                childIndex++;
            }
        }
    }
}