/*
 * Copyright (c) 2022 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef GEOMETRY_OFFSET_H
#define GEOMETRY_OFFSET_H

#include <limits>

#include "size.h"
#include "utils.h"
#include "ui_model.h"

namespace OHOS::uitest {
class Offset {
public:
    Offset() = default;
    ~Offset() = default;
    Offset(double deltaX, double deltaY) : deltaX_(deltaX), deltaY_(deltaY) {}
    Offset(Point p1, Point p2) : deltaX_(p2.px_-p1.px_), deltaY_(p2.py_-p1.py_) {}

    void Resets()
    {
        deltaX_ = 0.0;
        deltaY_ = 0.0;
    }

    static Offset Zero()
    {
        return Offset();
    }

    static Offset ErrorOffset()
    {
        return Offset((std::numeric_limits<double>::max)(), (std::numeric_limits<double>::max)());
    }

    bool IsZero() const
    {
        return operator==(Offset());
    }

    bool IsErrorOffset() const
    {
        return operator==(ErrorOffset());
    }

    double GetX() const
    {
        return deltaX_;
    }

    double GetY() const
    {
        return deltaY_;
    }

    double GetDistance() const
    {
        return std::sqrt((deltaX_ * deltaX_) + (deltaY_ * deltaY_));
    }

    Offset operator+(const Offset& offset) const
    {
        return Offset(deltaX_ + offset.deltaX_, deltaY_ + offset.deltaY_);
    }

    Offset operator+(const Size& size) const
    {
        return Offset(deltaX_ + size.Width(), deltaY_ + size.Height());
    }

    Offset operator-(const Offset& offset) const
    {
        return Offset(deltaX_ - offset.deltaX_, deltaY_ - offset.deltaY_);
    }

    Offset operator-(const Size& size) const
    {
        return Offset(deltaX_ - size.Width(), deltaY_ - size.Height());
    }

    Offset operator*(double value) const
    {
        return Offset(deltaX_ * value, deltaY_ * value);
    }

    Offset operator/(double value) const
    {
        if (NearZero(value)) {
            return ErrorOffset();
        }
        return Offset(deltaX_ / value, deltaY_ / value);
    }

    Offset& operator+=(const Offset& offset)
    {
        deltaX_ += offset.deltaX_;
        deltaY_ += offset.deltaY_;
        return *this;
    }

    Offset& operator-=(const Offset& offset)
    {
        deltaX_ -= offset.deltaX_;
        deltaY_ -= offset.deltaY_;
        return *this;
    }

    bool operator==(const Offset& offset) const
    {
        return NearEqual(deltaX_, offset.deltaX_) && NearEqual(deltaY_, offset.deltaY_);
    }

    bool operator!=(const Offset& offset) const
    {
        return !operator==(offset);
    }

    std::string ToString() const
    {
        std::stringstream ss;
        ss << "Offset (" << std::fixed << std::setprecision(TWO) << deltaX_ << ", " << deltaY_ << ")";
        std::string output = ss.str();
        return output;
    }

    bool IsPositiveOffset() const
    {
        return deltaX_ >= 0 && deltaY_ >= 0;
    }

private:
    double deltaX_ = 0.0;
    double deltaY_ = 0.0;
};
} // namespace OHOS::uitest

#endif // GEOMETRY_OFFSET_H