using System;
using System.Collections.Generic;
using System.Linq;
using AibisDream.Framework;
using AibisDream.Kit;
using UnityEngine;

namespace AibisDream
{
    public class BubbleGroup : Singleton<BubbleGroup>, IDialogView
    {
        private BubbleOption[] _options;
        private Dictionary<ActorRole, Bubble[]> _bubbleDict;
        public DialogViewType CurDialogType { get; private set; }

        private BubbleFactory _bubbleFactory;

        private SimpleObjectPool<Bubble> _bubblePool;
        private SimpleObjectPool<BubbleOption> _optionPool;

        #region 一些索引

        private Action _nextStep;
        private Bubble _curBubble;

        private IUnRegister _unRegister;

        #endregion

        #region 生命周期

        public override void OnSingletonInit()
        {
            // 注册泡泡
            _unRegister =
                EnumEventSystem.Global.Register<DialogEventEnum, DialogText>(DialogEventEnum.OptionSelected,
                    _ => HideOptions());
            // 工厂
            _bubbleFactory = new BubbleFactory(transform.Find("Bubbles"));
            // 加载选项
            InitOptions();
        }

        private void Start()
        {
            HideDialog();
        }

        public override void OnSingletonDestroy()
        {
            _unRegister.UnRegister();
        }

        public void LoadBubbles(BubbleSlotGroupData groupData)
        {
            CurDialogType = groupData.dialogViewType;
            // 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());
            
            // 更新选项的位置
            if (groupData.bubbleOptionSlots is { Length: 0 })
            {
                return;
            }

            foreach (var optionSlotData in groupData.bubbleOptionSlots)
            {
                if (optionSlotData.optionIdx >= _options.Length) continue;
                _options[optionSlotData.optionIdx].LoadData(optionSlotData);
            }
        }

        private void InitOptions()
        {
            _options = transform.Find("Options")
                .GetComponentsInChildren<BubbleOption>(true)
                .OrderBy(item => item.optionIdx)
                .ToArray();

            _bubbleDict = new Dictionary<ActorRole, Bubble[]>();
        }

        #endregion

        #region 对话框功能实现

        public void ShowLine(string dialogLine, CharacterVo character, Action nextStep, string lineId,
            bool isAutoSkip = false)
        {
            Debug.Log($"[BubbleGroup] ShowLine - 开始显示对话: {lineId}");
            Debug.Log($"[BubbleGroup] ShowLine - nextStep是否为null: {nextStep == null}");
            
            gameObject.SetActive(true);
            
            if (TryGetBubble(character.role, character.bubbleIdx, out var bubble))
            {
                bubble.ShowActorName(character);
                bubble.ShowLine(dialogLine);
                // 将非选定的Bubble隐藏
                HideDialog(bubble);
            }
            else
            {
                Debug.LogWarning($"{character.GetActorName()}的Role没有对应Bubble");
                return;
            }

            // 保留信息
            _nextStep = nextStep;
            _curBubble = bubble;
            
            Debug.Log($"[BubbleGroup] ShowLine - 设置完成，_nextStep是否为null: {_nextStep == null}");
        }

        public void ShowOptions(DialogOption[] dialogueOptions)
        {
            HideDialog();
            var availableOptions = dialogueOptions.Where(item => item.IsAvailable).ToArray();
            // 如果仅由一个选项
            if (availableOptions.Length == 1)
            {
                _options[0].ShowOption(availableOptions[0]);
            }
            else
            {
                for (var i = 0; i < availableOptions.Length; i++)
                {
                    _options[i + 1].ShowOption(availableOptions[i]);
                }
            }
        }

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

            HideOptions();
        }

        public bool TrySkipLine(bool isForceSkip = false)
        {
            if (!_curBubble)
            {
                return true;
            }
            
            if (_curBubble && _curBubble.IsShowingText)
            {
                _curBubble.SkipLine();
                return true;
            }

            return false;
        }

        public void NextStep()
        {
            Debug.Log($"[BubbleGroup] NextStep - _nextStep是否为null: {_nextStep == null}");
            
            if (_nextStep == null) 
            {
                Debug.Log("[BubbleGroup] NextStep - _nextStep为null，提前返回");
                return;
            }

            Debug.Log("[BubbleGroup] NextStep - 发送LineEnd事件");
            EnumEventSystem.Global.Send(DialogEventEnum.LineEnd);
            
            var next = _nextStep;
            _nextStep = null;

            _curBubble?.Hide();
            _curBubble = null;

            Debug.Log("[BubbleGroup] NextStep - 调用回调");
            next?.Invoke();
            Debug.Log("[BubbleGroup] NextStep - 回调调用完成");
        }

        public void OnLocalizationChanged(string value)
        {
        }

        #endregion

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

            HideOptions();
        }

        private bool TryGetBubble(ActorRole role, int idx, out Bubble bubble)
        {
            if (_bubbleDict.TryGetValue(role, out var bubbles))
            {
                bubble = bubbles.FirstOrDefault(item => item.idx == idx);
                return bubble != null;
            }

            bubble = null;
            return false;
        }

        private void HideOptions()
        {
            foreach (var option in _options)
            {
                option.Hide();
            }
        }
    }
}