#ifndef ALGORITHMBASE_H
#define ALGORITHMBASE_H

#include <opencv2/opencv.hpp>
#include <QString>
#include <QVariant>
#include <QMap>
#include <QList>
#include <typeindex>


// 1. Parameter type enum (for OpenCV algorithm common parameter types)
enum class ParamType {
    Int,        // Integer (e.g., kernel size, threshold)
    Float,      // Float (e.g., sigma, dp)
    Bool,       // Boolean (e.g., L2gradient)
    Enum        // Enum (e.g., threshold type THRESH_BINARY)
};

// 2. Single parameter metadata
struct ParamMeta {
    QString name;        // Parameter name (e.g., threshold1)
    QString displayName; // Display name (e.g., "Threshold 1")
    ParamType type;      // Parameter type
    double minVal;       // Minimum value (int/float)
    double maxVal;       // Maximum value (int/float)
    double defaultValue; // Default value
    QMap<int, QString> enumItems; // Enum items (key=enum value, value=display name)
    QVariant value;      // Current value

    // Constructor (simplify initialization)
    ParamMeta(QString n, QString dn, ParamType t, double min, double max, double def)
        : name(n), displayName(dn), type(t), minVal(min), maxVal(max), defaultValue(def), value(def) {}
};

// 3. Algorithm metadata (includes algorithm type + all parameter metadata)
struct AlgorithmMeta {
    QString type;        // Algorithm type (e.g., canny/threshold)
    QString name;        // Algorithm name (e.g., "Canny Edge Detection")
    QList<ParamMeta> params; // Parameter list
    
    // Add parameter method
    void addParam(const QString& displayName, const QString& type, double value, double min, double max) {
        ParamType paramType = ParamType::Int;
        if (type == "float") {
            paramType = ParamType::Float;
        } else if (type == "bool") {
            paramType = ParamType::Bool;
        }
        params << ParamMeta(displayName, displayName, paramType, min, max, value);
    }
};


struct RuntimeParamsBase {
    virtual ~RuntimeParamsBase() = default;
    std::type_index type() const {
        return std::type_index(typeid(*this));
    }
};



class AlgorithmBase {
public:
    virtual ~AlgorithmBase() = default;
    virtual void process(cv::Mat image) = 0;
    
    virtual AlgorithmMeta getParams() = 0;
    virtual void setParams(const AlgorithmMeta& params) = 0;
    
    // Get runtime parameters (returns nullptr if not implemented)
    virtual RuntimeParamsBase* getRuntimeParams() {
        return nullptr;
    }


    std::unique_ptr<RuntimeParamsBase> m_params;

};

#endif // ALGORITHMBASE_H