package net.citizensnpcs.npc.ai;

import net.citizensnpcs.api.ai.TargetType;
import net.citizensnpcs.npc.CitizensNPC;
import net.minecraft.server.EntityLiving;
import net.minecraft.server.Navigation;

import org.bukkit.Location;
import org.bukkit.entity.Player;

public class MCNavigationStrategy implements PathStrategy {
    private final Navigation navigation;
    private final Location target;

    MCNavigationStrategy(final CitizensNPC npc, Location dest, float speed) {
        this(npc.getHandle(), dest);
        navigation.a(dest.getX(), dest.getY(), dest.getZ(), speed);

    }

    MCNavigationStrategy(EntityLiving entity, EntityLiving target, float speed) {
        this(entity, target.getBukkitEntity().getLocation());
        navigation.a(target, speed);
    }

    private MCNavigationStrategy(EntityLiving entity, Location target) {
        this.target = target;
        if (entity.getBukkitEntity() instanceof Player) {
            entity.onGround = true;
            // not sure of a better way around this - if onGround is false, then
            // navigation won't execute, and calling entity.move doesn't
            // entirely fix the problem.
        }
        navigation = entity.al();
    }

    @Override
    public Location getTargetAsLocation() {
        return target;
    }

    @Override
    public TargetType getTargetType() {
        return TargetType.LOCATION;
    }

    @Override
    public boolean update() {
        return navigation.e();
    }
}