/*
 * Copyright 2013 The Android Open Source Project
 *
 * 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 INTERPOLATOR_H_
#define INTERPOLATOR_H_
#ifdef __ANDROID__
#include <jni.h>
#endif

#include <errno.h>
#include <time.h>
#include "JNIHelper.h"
#include "PerfMonitor.h"
#include <list>

namespace ndk_helper {

    enum INTERPOLATOR_TYPE {
        INTERPOLATOR_TYPE_LINEAR,
        INTERPOLATOR_TYPE_EASEINQUAD,
        INTERPOLATOR_TYPE_EASEOUTQUAD,
        INTERPOLATOR_TYPE_EASEINOUTQUAD,
        INTERPOLATOR_TYPE_EASEINCUBIC,
        INTERPOLATOR_TYPE_EASEOUTCUBIC,
        INTERPOLATOR_TYPE_EASEINOUTCUBIC,
        INTERPOLATOR_TYPE_EASEINQUART,
        INTERPOLATOR_TYPE_EASEINEXPO,
        INTERPOLATOR_TYPE_EASEOUTEXPO,
    };

    struct InterpolatorParams {
        float dest_value_;
        INTERPOLATOR_TYPE type_;
        double duration_;
    };

/******************************************************************
 * Interpolates values with several interpolation methods
 */
    class Interpolator {
    private:
        double start_time_;
        double dest_time_;
        INTERPOLATOR_TYPE type_;

        float start_value_;
        float dest_value_;
        std::list <InterpolatorParams> list_params_;

        float GetFormula(const INTERPOLATOR_TYPE type, const float t, const float b,
                         const float d, const float c);

    public:
        Interpolator();

        ~Interpolator();

        Interpolator &Set(const float start, const float dest,
                          const INTERPOLATOR_TYPE type, double duration);

        Interpolator &Add(const float dest, const INTERPOLATOR_TYPE type,
                          const double duration);

        bool Update(const double currentTime, float &p);

        void Clear();
    };

}  // namespace ndkHelper
#endif /* INTERPOLATOR_H_ */