Fruitomation/Assets/Scripts/Game/Items/ItemBehaviour.cs

using PashaBibko.Pacore.Attributes;
using Fruitomation.Global;
using System.Collections;
using UnityEngine;

using Vector3 = UnityEngine.Vector3;

namespace Fruitomation.Game.Items
{
    public sealed class ItemBehaviour : MonoBehaviour
    {
        public RectTransform RectTransform { get; private set; }
        public Rigidbody2D Body2D { get; private set; }
        
        private Canvas AttachedCanvas { get; set; }
        private bool EnteredCanvas { get; set; }

        private CustomItemBehaviour CustomBehaviour;
        private GameObject CurrentChild;

        [SerializeField, InspectorReadOnly("Item Type")]
        private ItemType InternalItemType = ItemType.None;

        public ItemType CurrentType
        {
            get => InternalItemType;
            set
            {
                if (InternalItemType != value) // Stops unneeded changes
                {
                    InternalItemType = value;
                    OnUpdateItemType();
                }
            }
        }

        private IEnumerator SendToGhostRealmInternal()
        {
            CurrentChild.SetActive(false);
            Body2D.Sleep();
            
            yield return new WaitForSeconds(0.5f);
            
            CurrentChild.SetActive(true);
            Body2D.WakeUp();
        }

        public void SendToTheGhostRealm() => StartCoroutine(SendToGhostRealmInternal());

        public void InitBehaviour(Canvas canvas, ItemType startType)
        {
            RectTransform = transform.GetComponent<RectTransform>();
            Body2D = transform.GetComponent<Rigidbody2D>();
            
            AttachedCanvas = canvas;
            CurrentType = startType;
            EnteredCanvas = false;
            
            CustomBehaviour?.OnCreation();
        }

        private void OnUpdateItemType()
        {
            if (CurrentChild is not null)
            {
                CustomBehaviour = null;
                Destroy(CurrentChild);
            }
            
            ItemInfo info = ItemInfoRegistry.Get(CurrentType);
            CurrentChild = Instantiate(info.Prefab, transform);

            CustomBehaviour = info.GetCustomBehaviour();
            if (CustomBehaviour is not null)
            {
                CustomBehaviour.AttachedItemBehaviour = this;
                CustomBehaviour.OnCreation();
            }
        }

        private void Update()
        {
            if (!GameStateController.Is(GameState.Simulation))
            {
                TriggerDestruction(false);
            }
        }

        private void FixedUpdate()
        {
            if (IsNotWithinCanvas(RectTransform, AttachedCanvas.GetComponent<RectTransform>()))
            {
                TriggerDestruction();
            }
        }

        private static bool IsNotWithinCanvas(RectTransform element, RectTransform canvas)
        {
            Vector3[] elementCorners = new Vector3[4];
            Vector3[] canvasCorners = new Vector3[4];

            element.GetWorldCorners(elementCorners);
            canvas.GetWorldCorners(canvasCorners);

            float aMin = float.MaxValue;
            float aMax = float.MinValue;

            foreach (Vector3 corner in canvasCorners)
            {
                aMin = Mathf.Min(aMin, corner.x);
                aMax = Mathf.Max(aMax, corner.x);
            }

            float bMin = float.MaxValue;
            float bMax = float.MinValue;

            foreach (Vector3 corner in elementCorners)
            {
                bMin = Mathf.Min(bMin, corner.x);
                bMax = Mathf.Max(bMax, corner.x);
            }

            return
                !(bMin > (aMin - 1f)) ||
                !(bMax < (aMax + 1f));
        }

        public void TriggerDestruction(bool harvest = true)
        {
            if (harvest)
            {
                ItemInfo info = ItemInfoRegistry.Get(CurrentType);
                float money = Random.Range(info.MinMoney, info.MaxMoney);
                MoneyController.Add(money);
            }

            Destroy(gameObject);
        }
    }
}