using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using AibisDream.Framework;
using AibisDream.Kit;
using AibisDream.Utility;
using TMPro;
using UnityEngine;

namespace AibisDream
{
    public class BubbleGroup : Singleton<BubbleGroup>, ILineView
    {
        [SerializeField] private TMP_Text widthEstimation;
        [SerializeField] private CenterBubble centerBubble;
     
        private Dictionary<ActorRole, Bubble[]> _bubbleDict = new();
        private BubbleFactory _bubbleFactory;
        private CancellationTokenSource _autoHideToken;

        #region 生命周期

        public override void OnSingletonInit()
        {
            // 工厂
            _bubbleFactory = new BubbleFactory(transform);
        }

        public void LoadBubbles(BubbleSlotGroupData groupData)
        {
            // 回收旧泡泡
            foreach (var oldBubble in _bubbleDict.Values.SelectMany(item => item))
            {
                oldBubble.Dispose();
            }

            // 加载新泡泡
            _bubbleDict = groupData.bubbleSlots
                .Select(item => _bubbleFactory.Create(item))
                .GroupBy(item => item.Role)
                .ToDictionary(group => group.Key, group => group.ToArray());
        }

        #endregion

        #region 新对话框功能实现

        public void RunLine(LineSyncToken syncToken)
        {
            // 先中断原来的事件
            _autoHideToken?.Cancel();
            _autoHideToken = null;
            
            var character = syncToken.lineInfo.character;
            
            if (TryGetBubble(character.role, character.bubbleIdx, out var bubble))
            {
                // 注册事件
                bubble.OnLineShown += syncToken.TextShown;
                syncToken.SkipTextAnima += () => bubble.SkipLine();
                syncToken.OnAdvance += AfterAdvance;
                // 播放文字
                bubble.ShowActorName(character);
                bubble.ShowLine(syncToken.lineInfo.lineText);
                syncToken.TextStart();
                // 将非选定的Bubble隐藏
                HideDialog(bubble);
            }
            else
            {
                Debug.LogWarning($"{character.GetActorName()}的Role {character.role}没有对应Bubble");
                HideDialog();
            }
        }
        
        public float EstimateTextWidth(string text, float fontSize)
        {
            widthEstimation.fontSize = fontSize;
            widthEstimation.text = text;
            widthEstimation.ForceMeshUpdate();
            return widthEstimation.preferredWidth;
        }

        private async void AfterAdvance()
        {
            _autoHideToken = new CancellationTokenSource();
            try
            {
                await Task.Delay(ConstRef.AutoHideDelay, _autoHideToken.Token);
                HideDialog();
            }
            catch (TaskCanceledException)
            {
                // 忽略取消
            }
        }

        public void HideDialog()
        {
            foreach (var textBubble in _bubbleDict.Values.SelectMany(inner => inner))
            {
                textBubble.Hide();
            }

            centerBubble.Hide();
        }

        private void HideDialog(IBubble activeBubble)
        {
            foreach (var textBubble in _bubbleDict.Values.SelectMany(inner => inner))
            {
                if (activeBubble != (IBubble)textBubble)
                {
                    textBubble.Hide();
                }
            }

            if (activeBubble != (IBubble)centerBubble)
            {
                centerBubble.Hide();
            }
        }

        private bool TryGetBubble(ActorRole role, int idx, out IBubble bubble)
        {
            if (role == ActorRole.Center)
            {
                bubble = centerBubble;
                return true;
            }

            if (_bubbleDict.TryGetValue(role, out var bubbles))
            {
                bubble = bubbles.FirstOrDefault(item => item.Idx == idx);
                return bubble != null;
            }

            bubble = null;
            return false;
        }

        #endregion
    }
}