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package toxi.color;

import toxi.math.InterpolateStrategy;
import toxi.math.ScaleMap;

public class ToneMap {

    public ScaleMap map;
    public ColorList colors;

    public ToneMap(float min, float max, ColorGradient gradient) {
        this(min, max, gradient.calcGradient());
    }

    public ToneMap(float min, float max, ColorList c) {
        map = new ScaleMap(min, max, 0, c.size() - 1);
        colors = c;
    }

    public ToneMap(float a, float b, ReadonlyTColor colA, ReadonlyTColor colB) {
        this(a, b, new ColorList(colA, colB));
    }

    public ToneMap(float min, float max, ReadonlyTColor colA,
            ReadonlyTColor colB, int res) {
        ColorGradient g = new ColorGradient();
        g.addColorAt(0, colA);
        g.addColorAt(res - 1, colB);
        colors = g.calcGradient(0, res);
        map = new ScaleMap(min, max, 0, colors.size() - 1);
    }

    public int getARGBToneFor(float t) {
        return getToneFor(t).toARGB();
    }

    public ReadonlyTColor getToneFor(float t) {
        int idx;
        if (colors.size() > 2) {
            idx = (int) (map.getClippedValueFor(t) + 0.5);
        } else {
            idx = (t >= map.getInputMedian() ? 1 : 0);
        }
        return colors.get(idx);
    }

    public void setMapFunction(InterpolateStrategy func) {
        map.setMapFunction(func);
    }
}