using LuaInterface;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;
using UnityEngine.UI;

public class LuaUIHelper : MonoBehaviour
{
    #region 消息提示
    private float messageDuration = 2f; // 单条消息显示时间
    private float appearDuration = 0.3f; // 出现动画时间
    private float disappearDuration = 0.5f; // 消失动画时间
    private float startYPosition = -100f; // 起始Y位置（底部）
    private float moveSpeed = 8f; // 位置移动速度
    private float spacingMultiplier = 1.2f; // 间距倍数（基于消息高度）

    private GameObject msgPrefab;
    private Stack<MessageItem> msgPool = new Stack<MessageItem>();
    private List<MessageItem> activeMessages = new List<MessageItem>();
    private float messageHeight = 60f; // 消息预制体的高度（运行时获取）
    private bool isInitialized = false;

    // 消息全部消失时的回调
    private LuaFunction onAllMessagesDisappeared;

    // 初始化消息预制体，并设置消息全部消失时的回调
    public void SetMsgPrefab(GameObject prefab, LuaFunction onMsgEnd)
    {
        msgPrefab = prefab;

        // 设置回调
        onAllMessagesDisappeared = onMsgEnd;

        // 获取预制体的高度
        RectTransform prefabRect = prefab.GetComponent<RectTransform>();
        if (prefabRect != null)
        {
            messageHeight = prefabRect.rect.height;
        }

        // 获取Image组件的高度（如果有）
        Image image = prefab.GetComponent<Image>();
        if (image != null)
        {
            RectTransform imageRect = image.GetComponent<RectTransform>();
            messageHeight = imageRect.rect.height;
        }

        isInitialized = true;
    }

    // 显示消息
    public void ShowInfo(string strMsg)
    {
        if (!isInitialized)
        {
            return;
        }

        MessageItem msg = GetMessageItem();
        msg.Initialize(strMsg, this, messageDuration);

        // 新消息总是在列表的开头（索引0），表示最底部
        activeMessages.Insert(0, msg);

        // 更新所有消息的目标位置
        UpdateAllTargetPositions();

        // 开始显示新消息
        StartCoroutine(msg.Show());
    }

    // 从池中获取消息项
    private MessageItem GetMessageItem()
    {
        MessageItem msg;

        if (msgPool.Count > 0)
        {
            msg = msgPool.Pop();
            msg.gameObject.SetActive(true);
        }
        else
        {
            GameObject go = Instantiate(msgPrefab, msgPrefab.transform.parent, false);
            msg = new MessageItem(go);
        }

        return msg;
    }

    // 计算消息之间的间距
    private float GetSpacing()
    {
        return messageHeight * spacingMultiplier;
    }

    // 更新所有消息的目标位置
    private void UpdateAllTargetPositions()
    {
        float spacing = GetSpacing();

        // 列表索引0是最底部的消息（最新）
        // 列表索引越大位置越高（越靠上）
        for (int i = 0; i < activeMessages.Count; i++)
        {
            // 第i条消息的位置 = 起始位置 + (从底部算起的索引 * 间距)
            float targetY = startYPosition + (i * spacing);
            activeMessages[i].SetTargetY(targetY);
        }
    }

    private void Update()
    {
        // 更新所有活跃消息的位置
        for (int i = 0; i < activeMessages.Count; i++)
        {
            var msg = activeMessages[i];

            // 更新消息的生命周期
            msg.UpdateMessage(Time.deltaTime);

            // 如果消息应该消失，开始消失动画
            if (msg.ShouldDisappear() && msg.currentState != MessageState.Disappearing)
            {
                StartCoroutine(HandleMessageDisappear(msg));
            }

            // 更新消息位置（平滑移动）
            if (msg.currentState == MessageState.Active || msg.currentState == MessageState.Appearing)
            {
                msg.UpdatePosition(Time.deltaTime * moveSpeed);
            }
        }
    }

    // 处理消息消失
    private IEnumerator HandleMessageDisappear(MessageItem msg)
    {
        // 开始消失动画
        yield return StartCoroutine(msg.Disappear());

        // 从活跃列表中移除
        if (activeMessages.Contains(msg))
        {
            activeMessages.Remove(msg);

            // 回收消息到对象池
            ReturnToPool(msg);

            // 重新计算剩余消息的位置
            UpdateAllTargetPositions();

            // 检查是否所有消息都消失了
            CheckAllMessagesDisappeared();
        }
    }

    // 检查是否所有消息都消失了
    private void CheckAllMessagesDisappeared()
    {
        if (activeMessages.Count == 0 && onAllMessagesDisappeared != null)
        {
            onAllMessagesDisappeared.Call();
        }
    }

    // 回收消息项到池中
    private void ReturnToPool(MessageItem msg)
    {
        msg.gameObject.SetActive(false);
        msg.Reset();
        msgPool.Push(msg);
    }

    // 消息状态枚举
    private enum MessageState
    {
        WaitingToShow, // 等待显示
        Appearing,     // 出现中
        Active,        // 活跃中
        Disappearing   // 消失中
    }

    // 消息项类
    private class MessageItem
    {
        public GameObject gameObject;
        public RectTransform rect;
        public Text text;
        public CanvasGroup canvasGroup;
        public Image backgroundImage; // 背景图片

        private LuaUIHelper manager;
        private MessageState _currentState = MessageState.WaitingToShow;
        public MessageState currentState => _currentState;

        private float currentY;      // 当前Y位置
        private float targetY;       // 目标Y位置
        private float appearProgress; // 出现进度
        private float lifeTime;      // 生命周期计时器
        private float maxLifeTime;   // 最大生命周期

        public MessageItem(GameObject go)
        {
            gameObject = go;
            rect = go.GetComponent<RectTransform>();
            text = go.transform.GetChild(0).GetComponent<Text>();

            // 获取背景图片
            backgroundImage = go.GetComponent<Image>();

            // 添加或获取CanvasGroup
            canvasGroup = go.GetComponent<CanvasGroup>();
            if (canvasGroup == null)
                canvasGroup = go.AddComponent<CanvasGroup>();
        }

        // 初始化消息
        public void Initialize(string message, LuaUIHelper manager, float duration)
        {
            this.manager = manager;
            this.maxLifeTime = duration;
            text.text = message;

            // 重置状态
            _currentState = MessageState.WaitingToShow;
            appearProgress = 0f;
            lifeTime = 0f;

            // 新消息从屏幕外更底部开始
            float spacing = manager.GetSpacing();
            currentY = manager.startYPosition - spacing - 50f;
            rect.anchoredPosition = new Vector2(0, currentY);
            canvasGroup.alpha = 0f;

            // 确保消息可见
            if (backgroundImage != null)
            {
                backgroundImage.enabled = true;
            }

            gameObject.SetActive(true);
        }

        // 设置目标Y位置
        public void SetTargetY(float y)
        {
            targetY = y;
        }

        // 更新消息生命周期
        public void UpdateMessage(float deltaTime)
        {
            if (_currentState == MessageState.Active)
            {
                lifeTime += deltaTime;
            }
        }

        // 检查是否应该消失
        public bool ShouldDisappear()
        {
            return _currentState == MessageState.Active && lifeTime >= maxLifeTime;
        }

        // 显示消息
        public IEnumerator Show()
        {
            _currentState = MessageState.Appearing;

            // 出现动画：从下方滑入并淡入
            float timer = 0f;
            float startY = currentY;

            while (timer < manager.appearDuration)
            {
                timer += Time.deltaTime;
                appearProgress = timer / manager.appearDuration;

                // 缓动函数：EaseOutCubic
                float easedProgress = 1f - Mathf.Pow(1f - appearProgress, 3);

                // 位置动画（从下方滑入）
                float newY = Mathf.Lerp(startY, targetY, easedProgress);
                currentY = newY;
                rect.anchoredPosition = new Vector2(0, newY);

                // 透明度动画
                canvasGroup.alpha = Mathf.Lerp(0f, 1f, easedProgress);

                yield return null;
            }

            // 进入活跃状态
            _currentState = MessageState.Active;
            currentY = targetY;
            rect.anchoredPosition = new Vector2(0, targetY);
            canvasGroup.alpha = 1f;

            // 重置生命周期计时器
            lifeTime = 0f;
        }

        // 消失动画
        public IEnumerator Disappear()
        {
            _currentState = MessageState.Disappearing;

            // 向上淡出消失
            float timer = 0f;
            float startY = currentY;
            float disappearY = startY + 50f; // 向上移动消失

            while (timer < manager.disappearDuration)
            {
                timer += Time.deltaTime;
                float progress = timer / manager.disappearDuration;

                // 缓动函数：EaseInCubic
                float easedProgress = Mathf.Pow(progress, 3);

                // 位置动画（向上移动）
                float newY = Mathf.Lerp(startY, disappearY, easedProgress);
                rect.anchoredPosition = new Vector2(0, newY);

                // 透明度动画
                canvasGroup.alpha = Mathf.Lerp(1f, 0f, easedProgress);

                yield return null;
            }

            // 完全消失
            canvasGroup.alpha = 0f;
            rect.anchoredPosition = new Vector2(0, disappearY);
        }

        // 更新位置（平滑移动到目标位置）
        public void UpdatePosition(float speed)
        {
            if ((_currentState == MessageState.Active || _currentState == MessageState.Appearing) &&
                Mathf.Abs(currentY - targetY) > 0.1f)
            {
                currentY = Mathf.Lerp(currentY, targetY, speed);
                rect.anchoredPosition = new Vector2(0, currentY);
            }
            else if (_currentState == MessageState.Active)
            {
                currentY = targetY;
                rect.anchoredPosition = new Vector2(0, targetY);
            }
        }

        // 重置状态
        public void Reset()
        {
            _currentState = MessageState.WaitingToShow;
            appearProgress = 0f;
            lifeTime = 0f;
            canvasGroup.alpha = 0f;

            // 重置位置到初始位置
            rect.anchoredPosition = Vector2.zero;
        }
    }
    #endregion
    public Text[] GetAllText(GameObject go)
    {
        Text[] allTexts = go.GetComponentsInChildren<Text>(true);
        return allTexts.Where(text => !text.CompareTag("untext")).ToArray();
    }
    public void DelayAction(float floTime, LuaFunction func)
    {
        StartCoroutine(_delayAction(floTime, func));
    }
    IEnumerator _delayAction(float floTime, LuaFunction func)
    {
        yield return new WaitForSeconds(floTime);
        func.Call();
    }
    public void AddButtonClick(Button button, LuaFunction func)
    {
        if (button == null || func == null) return;

        button.onClick.AddListener(() =>
        {
            func.Call();
        });
    }

    public void AddButtonClickWithGameObject(Button button, LuaFunction func)
    {
        if (button == null || func == null) return;

        GameObject go = button.gameObject;
        button.onClick.AddListener(() =>
        {
            func.Call(go);
        });
    }

    public void AddButtonClick(Button button, LuaFunction func, int index)
    {
        if (button == null || func == null) return;

        button.onClick.AddListener(() =>
        {
            func.Call(index);
        });
    }
    public void AddButtonClick(Button button, LuaFunction func, LuaTable ta)
    {
        if (button == null || func == null) return;

        button.onClick.AddListener(() =>
        {
            func.Call(ta);
        });
    }

    public float GetAnimatorAormalizedTime(Animator a, bool boo)
    {
        AnimatorStateInfo infor = a.GetCurrentAnimatorStateInfo(0);
        if (boo)
        {
            return infor.normalizedTime;
        }
        return infor.normalizedTime % 1;
    }
    public float GetAnimtorTotalTime(Animator a)
    {
        AnimatorStateInfo infor = a.GetCurrentAnimatorStateInfo(0);
        return infor.length;
    }
    public bool GetAnimatorIsName(Animator a, string strName)
    {
        return a.GetCurrentAnimatorStateInfo(0).IsName(strName);
    }

    public void SetGameObjectLastSibling(GameObject go)
    {
        go.transform.SetAsLastSibling();
    }
}