/*
 ** 2012 August 23
 **
 ** The author disclaims copyright to this source code.  In place of
 ** a legal notice, here is a blessing:
 **    May you do good and not evil.
 **    May you find forgiveness for yourself and forgive others.
 **    May you share freely, never taking more than you give.
 */
package com.TheRPGAdventurer.ROTD.server.entity.helper;

import com.TheRPGAdventurer.ROTD.util.math.Interpolation;
import net.minecraft.util.math.MathHelper;

/**
 * Enum for dragon life stages. Used as aliases for the age value of dragons.
 *
 * @author Nico Bergemann <barracuda415 at yahoo.de>
 */
public enum EnumDragonLifeStage {

    EGG(0.25f),
    HATCHLING(0.10f),
    JUVENILE(0.88f),
    ADULT(1.7f);

    public static final int TICKS_PER_STAGE = 42000;
    public static final EnumDragonLifeStage[] VALUES = values(); // cached for speed

    public static int clampTickCount(int ticksSinceCreation) {
        return MathHelper.clamp(ticksSinceCreation, 0, VALUES.length * TICKS_PER_STAGE);
    }

    public static EnumDragonLifeStage fromTickCount(int ticksSinceCreation) {
        return VALUES[clampTickCount(ticksSinceCreation) / TICKS_PER_STAGE];
    }

    public static float progressFromTickCount(int ticksSinceCreation) {
        EnumDragonLifeStage lifeStage = fromTickCount(ticksSinceCreation);
        int lifeStageTicks = ticksSinceCreation - lifeStage.startTicks();
        return lifeStageTicks / (float) TICKS_PER_STAGE;
    }

    public static float scaleFromTickCount(int ticksSinceCreation) {
        EnumDragonLifeStage lifeStage = fromTickCount(ticksSinceCreation);

        // constant size for egg and adult stage end growth if adult
        if (lifeStage == EGG || lifeStage == ADULT) {
            return lifeStage.scale;
        }

        // interpolated size between current and next stage
        return Interpolation.linear(lifeStage.scale, lifeStage.next().scale,
                progressFromTickCount(ticksSinceCreation));
    }

    public final float scale;

    EnumDragonLifeStage(float scale) {
        this.scale = scale;
    }

    public int startTicks() {
        return ordinal() * TICKS_PER_STAGE;
    }

    public EnumDragonLifeStage next() {
        return this == ADULT ? null : VALUES[ordinal() + 1];
    }
}