using UnityEngine;
using UnityEngine.Animations;
using Saltosion.OneWeapon.AI;
using Saltosion.OneWeapon.Utils;

namespace Saltosion.OneWeapon.Enemies {
    [RequireComponent(typeof(Rigidbody2D), typeof(AcceleratedMovement))]
    public class Enemy : MonoBehaviour {
        private static Enemy latestDebugHoveredEnemy = null;

        [Header("Debug Info")]
        public TextMesh BehaviourDisplay;
        public string CurrentBehaviour = "Nothing";

        public AcceleratedMovement Movement { private set; get; }

        private Rigidbody2D Body;
        private bool MovingToTarget = false;
        private Vector2 TargetPosition;

        private void Start() {
            Movement = GetComponent<AcceleratedMovement>();
            Body = GetComponent<Rigidbody2D>();
            BehaviourDisplay.GetComponent<MeshRenderer>().sortingLayerName = "Debug Text";
        }

        private void Update() {
            if (Application.isEditor) {
                Collider2D Hit = Physics2D.OverlapPoint(Camera.main.ScreenToWorldPoint(Input.mousePosition));
                if (Hit != null && Hit.attachedRigidbody == Body) {
                    latestDebugHoveredEnemy = this;
                }
            }

            bool DisplayDebugInfo = latestDebugHoveredEnemy == this;
            BehaviourDisplay.gameObject.SetActive(DisplayDebugInfo);
            if (DisplayDebugInfo) {
                BehaviourDisplay.text = CurrentBehaviour.Length == 0 ? "Nothing" : CurrentBehaviour;
            }
        }

        private void FixedUpdate() {
            if (MovingToTarget) {
                Movement.Direction = (TargetPosition - Body.position).normalized;
            } else {
                Movement.Direction = Vector2.zero;
            }
        }

        public void StartMovingTo(Vector2 target) {
            TargetPosition = target;
            MovingToTarget = true;
        }

        public void StopMoving() {
            MovingToTarget = false;
        }
    }
}