using System.Collections.Generic;
using System.Linq;
using UnityEngine;
//============================================================
//支持中文，文件使用UTF-8编码
//@author	JiphuTzu
//@create	20220910
//@company	Umawerse
//
//@description:
//============================================================
namespace Umawerse.FiniteStateMachines
{
    public abstract class DrawingState : FiniteState<ToolsBootstrap>
    {
        protected static readonly int COLOR_ID = Shader.PropertyToID("_Color");
        protected List<Vector3> vertices;
        protected GameObject target;
        private int _minVertexCount;
        protected int _maxVertexCount;
        protected StateName currentName;


        protected DrawingState(ToolsBootstrap root, StateName name, int minCount, int maxCount) : base(root, name)
        {
            _minVertexCount = minCount;
            _maxVertexCount = maxCount;
        }

        public override void Enter()
        {
            currentName = name;
            root.tapGesture.onOneClick.AddListener(() =>
            {
                OnTap();
            });
            root.tapGesture.onDoubleClick.AddListener(() =>
            {
                OnDoubleTap();
            });
            root.tapGesture.SetLayerMask(1<<8);
            Init();
        }

        private void OnTap()
        {
            if (root.tapGesture.CheckGuiRaycastObjects()) return;

            Vector3 posTemp = root.tapGesture.HitTest(Input.mousePosition, false).point;
            OnTap(posTemp);
        }

        private void OnDoubleTap()
        {
            if (root.tapGesture.CheckGuiRaycastObjects()) return;
            Vector3 posTemp = root.tapGesture.HitTest(Input.mousePosition, false).point;
            OnDoubleTap(posTemp);

            Exit();
            Enter();

        }



        protected abstract void OnTap(Vector3 pos);
        protected abstract void OnDoubleTap(Vector3 pos);

        protected abstract void UpdatePreview(Vector3 pos);

        public virtual void Init()
        {
            vertices = new List<Vector3>();
            target = new GameObject($"{name}_{Time.frameCount:D5}");
            root.instructs.Add(target);
        }

        public abstract void Complete();

        // private int GetClickCount()
        // {
        //     return root.inputSystem.GetClickCount();
        // }

        public override StateName Update()
        {
            if (vertices.Count >= _maxVertexCount) return StateName.none;
            if (vertices.Count > 0)
            {
                var hit = root.tapGesture.HitTest();
                if (hit.collider != null)
                    UpdatePreview(new Vector3(hit.point.x, 580f, hit.point.z));
            }
            return currentName;
        }


        public GameObject GetObject()
        {
            return target;
        }
        public abstract void AddPoint(Vector3 position, bool showImmediately = true);


        public override void Exit()
        {
            root.tapGesture.onOneClick.RemoveAllListeners();
            root.tapGesture.onDoubleClick.RemoveAllListeners();
            if (target.transform.childCount <= 1)
            {
                Object.Destroy(target);
            }
            if (vertices.Count >= _minVertexCount)
            {
                var h = vertices.Max(v => v.y);
            }
        }
    }
}