#pragma once
#include "vde/brep/brep.h"
#include <string>
#include <vector>
#include <memory>
#include <functional>

namespace vde::brep {

/// Feature operation types
enum class FeatureType {
    PrimitiveBox,
    PrimitiveCylinder,
    PrimitiveSphere,
    Extrude,
    Fillet,
    Chamfer,
    Shell,
    BooleanUnion,
    BooleanDifference,
    BooleanIntersection
};

/// Parameters for a feature operation
struct FeatureParams {
    std::vector<double> values;     // numeric params
    std::vector<int> int_values;    // integer params
    std::string name;               // operation name
};

/// One node in the feature tree
struct FeatureNode {
    FeatureType type;
    FeatureParams params;
    std::vector<std::unique_ptr<FeatureNode>> children;

    /// Evaluate this feature (rebuild geometry from parameters)
    [[nodiscard]] BrepModel evaluate() const;
};

/// Feature tree with undo/redo support
class FeatureHistory {
public:
    /// Apply a feature operation
    void apply(const BrepModel& input, FeatureType type, const FeatureParams& params);

    /// Undo last operation
    [[nodiscard]] bool undo();

    /// Redo last undone operation
    [[nodiscard]] bool redo();

    /// Get current model
    [[nodiscard]] const BrepModel& current() const;

    /// Number of operations in history
    [[nodiscard]] size_t size() const { return states_.size(); }

private:
    std::vector<BrepModel> states_;
    size_t current_idx_ = 0;
};

} // namespace vde::brep