using System.Collections.Generic;
using UnityEngine;

public class SingleTargetFinder
{
    HashSet<string> filterTags = new HashSet<string>();

    public SingleTargetFinder(params string[] filterTags)
    {
        for(int i = 0; i < filterTags.Length; i++)
        {
            this.filterTags.Add(filterTags[i]);
        }
    }

    public bool TryFindNearest(Vector2 pivot, out CreatureBase result)
    {
        CreatureBase minDistCreature = null;
        float minSqrtDist = float.MaxValue;

        BattleMgr.LoopAllCreatures((creature) =>
        {
            if (filterTags.Contains(creature.tag))
            {
                float sqrtDist = (pivot - (Vector2)creature.transform.position).sqrMagnitude;
                if (sqrtDist < minSqrtDist)
                {
                    minSqrtDist = sqrtDist;
                    minDistCreature = creature;
                }
            }
            return true;
        });

        result = minDistCreature;
        return minDistCreature != null;
    }
}