using System;
using UnityEngine;
using UnityEngine.Events;
using Yarn.Unity;

namespace AibisDream.FixSystem
{
    public class CableSystem : MonoBehaviour
    {
        #region 组件索引

        public Plug PlugRef { get; private set; }
        public Cable CableRef { get; private set; }
        public Transform CableRootPos { get; private set; }
        public Socket InitSocket { get; private set; }

        public BodyModuleSystem BodyModuleSystem { get; private set; }
        private BodyModule[] _bodyModules;

        #endregion

        #region 系统状态
        
        public bool isInDialog = false;
        public bool isActive = true;
        
        [HideInInspector] public Socket curSocket;
        
        #endregion

        #region 事件

        public UnityEvent<Socket> plugInEvent;
        public UnityEvent<Socket> plugOutEvent;

        public UnityEvent plugStartDrag;
        public UnityEvent plugEndDrag;

        #endregion

        public Vector3 InitSocketPos => InitSocket.transform.position;
        
        private void Awake()
        {
            InitComponentRefs();
        }

        private void Start()
        {
            InitSystem();
        }

        private void OnEnable()
        {
            DialogController.OnDialogueStart += HandleDialogueStart;
            DialogController.OnDialogueComplete += HandleDialogueComplete;
        }

        private void OnDisable()
        {
            DialogController.OnDialogueStart -= HandleDialogueStart;
            DialogController.OnDialogueComplete -= HandleDialogueComplete;
        }

        private void InitComponentRefs()
        {
            PlugRef = transform.Find("Plug").GetComponent<Plug>();
            CableRef = transform.Find("Cable").GetComponent<Cable>();
            CableRootPos = transform.Find("Cable Root Pos").transform;
            InitSocket = transform.Find("Init Socket").GetComponent<Socket>();

            BodyModuleSystem = transform.parent.GetComponent<BodyModuleSystem>();
        }

        private void InitSystem()
        {
            PlugRef.InitPlug(InitSocket);
        }

        /// <summary>
        /// 寻找最接近的Module
        /// </summary>
        /// <param name="sourcePos">源位置</param>
        /// <param name="targetModule">最近的Module</param>
        /// <returns>是否能找到目标范围内的Module</returns>
        public bool TryFindClosestSocket(Vector3 sourcePos, out BodyModule targetModule)
        {
            return BodyModuleSystem.TryFindClosestSocket(sourcePos, out targetModule);
        }

        #region 系统可用状态

        private void HandleDialogueStart()
        {
            isInDialog = true;
        }

        private void HandleDialogueComplete()
        {
            isInDialog = false;
        }
        
        [YarnCommand("Disable_plugInput")]
        public void Disable_plugInput()
        {
            isActive = false;
        }

        [YarnCommand("Enable_plugInput")]
        public void Enable_plugInput()
        {
            isActive = true;
        }

        /// <summary>
        /// 查询插线系统是否可用
        /// </summary>
        /// <returns></returns>
        public bool IsPlugAvailable()
        {
            return isActive && !isInDialog;
        }

        #endregion
    }
}