using System;
using System.Collections;
using System.Collections.Generic;
using Sirenix.OdinInspector;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.Serialization;

namespace UnityTest.ZXL
{
    [RequireComponent(typeof(BoxCollider), typeof(Rigidbody))]
    public class DragItem : MonoBehaviour, IDragHandler, IPointerClickHandler, IEndDragHandler
    {
        [FormerlySerializedAs("img")] public RectTransform icon;

        [SerializeField] [ReadOnly] private Vector3 startPosition;
        [SerializeField] [ReadOnly] private bool isCanPut;
        [SerializeField] [ReadOnly] private bool isPutIn;

        [SerializeField] private DragData _dragData;

        private void Start()
        {
            var rect = GetComponent<RectTransform>();
            startPosition = rect.anchoredPosition3D;
            // startPosition = icon.position;

            isPutIn = false;
            GetComponent<Collider>().enabled = true;
        }

        public void OnDrag(PointerEventData eventData)
        {
            if (isPutIn)
                return;

            Debug.Log("OnDrag");
            icon.position = eventData.position;
        }

        public void OnEndDrag(PointerEventData eventData)
        {
            if (isPutIn)
                return;

            Debug.Log("OnEndDrag");
            TryPut();
        }

        public void OnPointerClick(PointerEventData eventData)
        {
            if (isPutIn)
                return;

            Debug.Log("OnPointerClick");
        }

        void TryPut()
        {
            if (target != null && isCanPut)
            {
                // 到达目标点的固定位置
                // icon.position = target.itemPosition;
                // startPosition = target.itemPosition;

                // 回到原位
                icon.anchoredPosition3D = startPosition;

                _dragData.PutOrOut(true);
                isPutIn = true;
            }
            else
            {
                icon.anchoredPosition3D = startPosition;
                _dragData.PutOrOut(false);
            }
        }

        private DragTarget target;

        private void OnTriggerEnter(Collider other)
        {
            Debug.Log($"{transform.parent.name} OnTriggerEnter {other.transform.parent.name}");
            target = other.GetComponent<DragTarget>();
            if (target == null)
                return;

            isCanPut = true;
        }

        private void OnTriggerExit(Collider other)
        {
            Debug.Log($"{transform.parent.name} OnTriggerExit {other.transform.parent.name}");
            if (isPutIn)
            {
                Debug.Log($"已经放入");
                return;
            }

            isCanPut = false;
            target = null;
        }

#if UNITY_EDITOR
        [Button]
        void Add()
        {
            var rectTransform = gameObject.GetComponent<RectTransform>();
            var rect = rectTransform.rect;
            var boxCollider = GetComponent<BoxCollider>();
            boxCollider.isTrigger = true;
            boxCollider.size = new Vector3(rect.width, rect.height, 5);
            var rigidbody = GetComponent<Rigidbody>();
            rigidbody.useGravity = true;
            rigidbody.isKinematic = true;
            icon = rectTransform;
            UnityEditor.EditorUtility.SetDirty(this);
        }

        [Button]
        void SetDirty()
        {
            UnityEditor.EditorUtility.SetDirty(this);
        }
#endif
    }

    [System.Serializable]
    public struct DragData
    {
        public string name;
        public CharacterInfo info;

        public void PutOrOut(bool isPut)
        {
            if (info == null || !isPut)
                return;

            info.SetCloth(name);
        }
    }
}