using PashaBibko.Pacore.Attributes;
using UnityEngine.UI;
using UnityEngine;

namespace Fruitomation
{
    public class FruitBehaviour : MonoBehaviour
    {
        [Header("References")]
        [SerializeField] private RectTransform RectTransform;
        [SerializeField] private Rigidbody2D Body2D;
        [SerializeField] private Button Button;

        [Header("Read only")]
        [InspectorReadOnly, SerializeField] private Canvas AttachedCanvas;
        [InspectorReadOnly, SerializeField] private FruitSpawner Spawner;
        [InspectorReadOnly, SerializeField] private bool EnteredCanvas;

        public void InitFruitBehaviour(Canvas canvas, FruitSpawner spawner)
        {
            AttachedCanvas = canvas;
            EnteredCanvas = false;
            Spawner = spawner;

            Body2D.velocity = Random.insideUnitCircle * 2.5f;

            Button.onClick.AddListener(OnPlayerClicked);
        }

        private void OnPlayerClicked() => TriggerDestruction();

        private void FixedUpdate()
        {
            bool contained = IsWithinCanvas(RectTransform, AttachedCanvas.GetComponent<RectTransform>());
            EnteredCanvas = EnteredCanvas || contained;

            if (!contained && EnteredCanvas)
            {
                TriggerDestruction();
            }
        }

        private void TriggerDestruction()
        {
            Spawner.RemoveFruit(this);
            Destroy(gameObject);
        }

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

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

            Rect bounds = new
            (
                canvasCorners[0].x,
                canvasCorners[0].y,
                canvasCorners[2].x - canvasCorners[0].x,
                canvasCorners[2].y - canvasCorners[0].y
            );

            foreach (Vector3 corner in elementCorners)
            {
                if (bounds.Contains(corner))
                {
                    return true;
                }
            }

            return false;
        }
    }
}