using BaseGames.Combat;
using UnityEngine;

namespace BaseGames.World
{
    /// <summary>
    /// 单向可破坏物。在 DestructibleTile 基础上增加攻击方向校验。
    /// 使用 AttackSide.Any 等效于普通 DestructibleTile。
    /// </summary>
    public class DirectionalDestructible : DestructibleTile
    {
        public enum AttackSide { Left, Right, Top, Bottom, Any }

        [SerializeField] private AttackSide _validAttackSide = AttackSide.Any;

        protected override bool CheckDestroyCondition(DamageInfo info)
        {
            if (_validAttackSide == AttackSide.Any)
                return base.CheckDestroyCondition(info);

            var dir = (info.SourcePosition - (Vector2)transform.position).normalized;

            bool valid = _validAttackSide switch
            {
                AttackSide.Left   => dir.x < -0.5f,
                AttackSide.Right  => dir.x >  0.5f,
                AttackSide.Top    => dir.y >  0.5f,
                AttackSide.Bottom => dir.y < -0.5f,
                _                 => true
            };

            return valid && base.CheckDestroyCondition(info);
        }

#if UNITY_EDITOR
        private void OnDrawGizmos()
        {
            Vector2 arrow = _validAttackSide switch
            {
                AttackSide.Left   => Vector2.left,
                AttackSide.Right  => Vector2.right,
                AttackSide.Top    => Vector2.up,
                AttackSide.Bottom => Vector2.down,
                _                 => Vector2.zero
            };

            if (arrow == Vector2.zero) return;

            Gizmos.color = new Color(1f, 0.5f, 0f, 0.9f);
            var origin = (Vector2)transform.position;
            Gizmos.DrawLine(origin, origin + arrow * 0.8f);
        }
#endif
    }
}