using System;
using System.Collections;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using Cysharp.Threading.Tasks;
using DefaultNamespace;
using DefaultNamespace.ProcessMode;
using MotionFramework;
using TMPro;
using UnityEngine;

/// <summary>
/// 教学模式提示，箭头
/// </summary>
public class IndicatorArrowComponent : MonoBehaviour
{
    public RectTransform indicatorArrow; //箭头
    public GameObject teachingModePrompt; //提示消息
    [SerializeField] private GameObject _tempGame;
    private CancellationTokenSource cts;

    public void Init()
    {
        Debug.Log(MotionEngine.GetModule<DataConfigManager>().GetProcessMode());


        if (MotionEngine.GetModule<DataConfigManager>().GetProcessMode() == ProcessMode.Teaching)
            indicatorArrow.gameObject.SetActive(true);


        teachingModePrompt.SetActive(true);
        MotionEngine.GetModule<AnimationProcessManager>().OnTeachingPromptsObjects += TeachingPromptsObjects;
        if (MotionEngine.GetModule<DataConfigManager>().GetProcessMode() == ProcessMode.Teaching 
            || MotionEngine.GetModule<DataConfigManager>().GetProcessMode() == ProcessMode.Training)//LY除了教学模式都弹出提示
        {
            MotionEngine.GetModule<AnimationProcessManager>().OnStepProcessDescriptionMessage += OnSendMessagePrompt;
        }
    }

    /// <summary>
    /// 消息
    /// </summary>
    /// <param name="message"></param>
    private void OnSendMessagePrompt(string message)
    {
        if (MotionEngine.GetModule<DataConfigManager>().GetProcessMode() != ProcessMode.Assessment)
        {
            teachingModePrompt.transform.Find("Text").GetComponent<TMP_Text>().text = message;
            // 取消上一个等待任务并启动新的任务
            cts?.Cancel();
            cts = new CancellationTokenSource();
            ClearMessageAfterDelayAsync(3f, teachingModePrompt.transform.Find("Text").GetComponent<TMP_Text>(), cts.Token).Forget();
        }
    }

    private async UniTaskVoid ClearMessageAfterDelayAsync(float delay, TMP_Text textComponent, CancellationToken token)
    {
        try
        {
            await UniTask.Delay((int)(delay * 1000), cancellationToken: token);
            textComponent.text = string.Empty;
        }
        catch (OperationCanceledException)
        {
        }
    }

    /// <summary>
    /// 箭头指向得物体
    /// </summary>
    /// <param name="gameobj"></param>
    private void TeachingPromptsObjects(GameObject gameobj)
    {
        _tempGame = gameobj;
    }

    void Update()
    {
        if (_tempGame != null)
        {
            Vector3 screenPos = Camera.main.WorldToScreenPoint(_tempGame.transform.position);

            if (screenPos.z > 0 && screenPos.x > 0 && screenPos.x < Screen.width && screenPos.y > 0 && screenPos.y < Screen.height)
            {
                indicatorArrow.position = screenPos;
            }
            else
            {
                Vector3 offScreenPos = indicatorArrow.position;
                offScreenPos.y = 9999;
                indicatorArrow.position = offScreenPos;
            }
        }
        else
        {
            Vector3 offScreenPos = indicatorArrow.position;
            offScreenPos.y = 9999;
            indicatorArrow.position = offScreenPos;
        }
    }
}