#ifndef pointpair_h__
#define pointpair_h__

#include <opencv2/opencv.hpp>
#include <opencv2/opencv_modules.hpp>
#include <vector>

using std::vector;
using std::pair;
using namespace cv;

template<typename _Point>
class _PointPair : public pair<_Point, _Point>
{
public:
    _PointPair()
        : pair<_Point, _Point>(), mAver(0) {}

    _PointPair(const _Point& p0, const _Point& p1)
        : pair<_Point, _Point>(p0, p1), mAver(0) {}

    _PointPair(const _PointPair<_Point>& pointPair)
        : pair<_Point, _Point>(pointPair.first, pointPair.second)
        , mAver(pointPair.aver())
        , mStr(pointPair.getStr())
    {}

    void setAver(float val) { mAver = val; }
    float aver() const { return mAver; }

    std::string getStr() const { return mStr; }
    void setStr(std::string iVal) { mStr = iVal; }

protected:
    float mAver;
    std::string mStr;

private:
};

typedef _PointPair<Point> PointPair;
typedef _PointPair<Point2f> PointfPair;

void convertPointPair2PointfPair(const vector<PointPair>& vec0,
    vector<PointfPair>& vec1);

template<typename _Point>
double pointDis(const _Point& i, const _Point& j)
{
    return norm(i - j);
}

template<typename _PointPair>
double pointPairXDis(const _PointPair& i, const _PointPair& j)
{
    return (abs(i.first.x - j.first.x) +
        abs(i.second.x - j.second.x)) / 2.0;
}

double pointPairDis(const PointPair& i, const PointPair& j);

template<typename _PointPair>
double pointPairLen(const _PointPair& p)
{
    return pointDis(p.first, p.second);
}

template<typename _PointPair>
void addYToPointPairs(vector<_PointPair>& vec, int y)
{
    for (auto i = vec.begin(); i != vec.end(); ++i)
    {
        i->first.y += y;
        i->second.y += y;
    }
}

#endif // pointpair_h__