using UnityEngine;
using A2W;
using Cysharp.Threading.Tasks;
using System.Collections.Generic;
using DG.Tweening;

public class MessagePanel : UIPanel
{
    [SerializeField] MessageElement messageElementPrefab;
    [SerializeField] RectTransform content;

    List<MessageElement> messages;

    public override void Init()
    {
        messages = new List<MessageElement>();
    }

    public override async UniTask Show()
    {
        await UniTask.Yield();

        gameObject.SetActive(true);
    }
    public override async UniTask Hide()
    {
        await UniTask.Yield();

        gameObject.SetActive(false);
    }

    public void AddMessage(string message, float duration = -1)
    {
        // 默认加到开头
        AddMessage(message, duration, 0);
    }

    public void AddMessage(string message, float duration, int index)
    {
        var msgEle = Instantiate<MessageElement>(messageElementPrefab, content, false);
        msgEle.Init(this, message, duration);
        //messages.Add(msgEle);
        messages.Insert(index, msgEle);

        
        UpdateMessagesPosY();
    }

    public void DelMessage(string message)
    {
        foreach (var msg in messages)
        {
            if (msg.Message == message)
            {
                DelMessage(msg);
                break;
            }
        }
    }

    public async void DelMessage(MessageElement msgEle)
    {
        messages.Remove(msgEle);
        Destroy(msgEle.gameObject);

        await UniTask.Yield();

        UpdateMessagesPosY();
    }

    public void UpdateMessagesPosY()
    {
        // 根据messageElement的index使用Dotween移动PosY到指定位置（-index * Height
        for (int i = 0; i < messages.Count; i++)
        {
            messages[i].RectTransform.DOAnchorPosY(-i * messages[i].RectTransform.rect.height, 0.2f);
        }
    }
}