//////////////////////////////////////////////////////////////////////////////
// This file is part of the Journey MMORPG client                           //
// Copyright © 2015-2016 Daniel Allendorf                                   //
//                                                                          //
// This program is free software: you can redistribute it and/or modify     //
// it under the terms of the GNU Affero General Public License as           //
// published by the Free Software Foundation, either version 3 of the       //
// License, or (at your option) any later version.                          //
//                                                                          //
// This program is distributed in the hope that it will be useful,          //
// but WITHOUT ANY WARRANTY; without even the implied warranty of           //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the            //
// GNU Affero General Public License for more details.                      //
//                                                                          //
// You should have received a copy of the GNU Affero General Public License //
// along with this program.  If not, see <http://www.gnu.org/licenses/>.    //
//////////////////////////////////////////////////////////////////////////////
#include "Gauge.h"

namespace jrc
{
    Gauge::Gauge(Texture front, Texture mid, Texture end, int16_t max, float percent)
    {
        barfront = front;
        barmid = mid;
        barend = end;
        maximum = max;
        percentage = percent;

        target = percentage;
    }

    Gauge::Gauge() {}

    void Gauge::draw(const DrawArgument& args) const
    {
        int16_t length = static_cast<int16_t>(percentage * maximum);
        if (length > 0)
        {
            barfront.draw(args);
            barmid.draw(args + DrawArgument({ 1, 0 }, { length, 0 }));
            barend.draw(args + DrawArgument(length + 1, 0));
        }
    }

    void Gauge::update(float t)
    {
        if (target != t)
        {
            target = t;
            step = (target - percentage) / 24;
        }

        if (percentage != target)
        {
            percentage += step;
            if (step < 0.0f)
            {
                if (target - percentage >= step)
                    percentage = target;
            }
            else if (step > 0.0f)
            {
                if (target - percentage <= step)
                    percentage = target;
            }
        }
    }
}