/*
* File name: patern_preview.cpp
* Author: lejulien
* Date created: 01-01-1970 00:59:59
// Date modified: 12-01-2026 21:30:10
* ------
*/

#include <imgui.h>
#include <raylib.h>
#include <rlImGui.h>

#include <patern_preview.hpp>
#include <paterns_menu.hpp>
#include <settings_menu.hpp>
#include <snapping.hpp>
#include <world.hpp>

namespace gol {

PaternPreview::PaternPreview(std::shared_ptr<ctx> context)
    : context_(context) {}

void PaternPreview::start() { is_started = true; }

void PaternPreview::update() {
  if (!is_started) return;
  mouse_pos_ = GetMousePosition();
  if (ImGui::IsMouseClicked(1)) {
    is_started = false;
    return;
  }
  if (ImGui::IsMouseClicked(0) && !is_unplacable_) {
    auto selection_pos =
        screenToGrid(mouse_pos_, context_->settings_menu->getCellSize());
    Vector2i size = {context_->paterns_menu->patern_width_,
                     context_->paterns_menu->patern_height_};
    context_->world->setSelection(selection_pos, size,
                                  context_->paterns_menu->loaded_patern_);
    is_started = false;
  }
  // mouse should pass through any present windows
}

void PaternPreview::display() {
  if (!is_started) return;
  auto cell_size = context_->settings_menu->getCellSize();
  auto mouse_in_grid =
      screenToGrid(mouse_pos_, context_->settings_menu->getCellSize());
  is_unplacable_ =
      ((mouse_in_grid.x + context_->paterns_menu->patern_width_ >
        context_->world->getWidth()) ||
       (mouse_in_grid.y + context_->paterns_menu->patern_height_ >
        context_->world->getHeight()));
  for (int j = 0; j < context_->paterns_menu->patern_height_; j++) {
    for (int i = 0; i < context_->paterns_menu->patern_width_; i++) {
      auto cell =
          context_->paterns_menu
              ->loaded_patern_[i + (j * context_->paterns_menu->patern_width_)];
      if (cell) {
        DrawRectangle((i + mouse_in_grid.x) * cell_size,
                      (j + mouse_in_grid.y) * cell_size, cell_size, cell_size,
                      (is_unplacable_) ? RED : BLUE);
      }
    }
  }
}

};  // namespace gol