distance_grid.h

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#ifndef DISTANCE_GRID_H
#define DISTANCE_GRID_H
 
#include <MazeBuilder/grid_interface.h>
 
#include <future>
#include <memory>
#include <string>

namespace mazes
{
    class cell;
    class distances;
    class grid;
    class grid_operations;

    class distance_grid : public grid_interface
    {
    public:
        explicit distance_grid(
            unsigned int width = 1u,
            unsigned int length = 1u,
            unsigned int levels = 1u);
 
        distance_grid(const distance_grid &) = delete;
 
        distance_grid &operator=(const distance_grid &) = delete;
 
        distance_grid(distance_grid &&) noexcept = default;
 
        distance_grid &operator=(distance_grid &&) noexcept = default;

        [[nodiscard]] std::string contents_of(std::shared_ptr<cell> const &c) const noexcept override;

        [[nodiscard]] std::uint32_t
        background_color_for(std::shared_ptr<cell> const &c) const noexcept override;
 
        // Delegate to embedded grid
        [[nodiscard]] grid_operations &operations() noexcept override;
 
        [[nodiscard]] const grid_operations &operations() const noexcept override;

        void resize(unsigned int rows, unsigned int cols, unsigned int levels) const noexcept;

        void calculate_distances(int start_index, int end_index) noexcept;

        [[nodiscard]] std::shared_ptr<distances> get_distances() const noexcept;
 
    private:
        std::shared_ptr<distances> m_distances;
 
        std::unique_ptr<grid_interface> m_grid;
    };
}
 
#endif // DISTANCE_GRID_H