using System;
using AibisDream.Framework;
using AibisDream.Kit;
using AibisDream.Utility;
using Febucci.UI;
using TMPro;
using UnityEngine;
using UnityEngine.UI;

namespace AibisDream
{
    public class DialogBox : MonoBehaviour, IDialogView
    {
        #region box组件名称

        private const string ActorName = "Actor Name";
        private const string DialogText = "Dialog Text";
        private const string NextArray = "Next Array";
        private const string ChoiceBox = "Choice Box";

        #endregion

        #region box组件

        private TypewriterByCharacter _dialogText;
        private TextMeshProUGUI _actorName;
        private GameObject _nextArray;
        private GameObject _choiceBox;

        #endregion

        private TextParam _textParam;

        private Action _nextStep;

        [SerializeReference] private GameObject choiceButtonPrefab;

        private void Awake()
        {
            InitComponents();
            RegisterEvents();
        }

        #region 初始化

        private void InitComponents()
        {
            _actorName = transform.Find(ActorName)?.gameObject.GetComponentInChildren<TextMeshProUGUI>();
            _dialogText = transform.Find(DialogText)?.gameObject.GetComponent<TypewriterByCharacter>();
            _nextArray = transform.Find(NextArray)?.gameObject;
            _choiceBox = transform.Find(ChoiceBox)?.gameObject;
        }
        
        private void RegisterEvents()
        {
            _dialogText.onTextShowed.AddListener(OnTextShowed);
        }

        #endregion

        /// <summary>
        /// 隐藏对话盒
        /// </summary>
        public void HideDialog()
        {
            gameObject.SetActive(false);
        }

        /// <summary>
        /// 显示对话
        /// </summary>
        /// <param name="dialogLine">对话内容</param>
        /// <param name="character">角色内容</param>
        /// <param name="nextStep">下一步</param>
        /// <param name="lineId">行号</param>
        /// <param name="isAutoSkip">是否自动跳过，默认为false</param>
        public void ShowLine(string dialogLine, CharacterVo character, Action nextStep, string lineId,
            bool isAutoSkip = false)
        {
            gameObject.SetActive(true);

            // 把原有对话清掉
            ClearBox();
            _dialogText.gameObject.SetActive(true);
            _choiceBox?.SetActive(false);

            // 显示内容
            ShowActorName(character);
            _dialogText.ShowText(dialogLine);
            
            _nextStep = nextStep;
        }

        private void OnTextShowed()
        {
            _nextArray.gameObject.SetActive(true);
            EnumEventSystem.Global.Send(DialogEventEnum.LineShown);
        }

        public void NextStep()
        {
            if (_nextStep == null) return;
            
            ClearBox();
            EnumEventSystem.Global.Send(DialogEventEnum.LineEnd);
            var next = _nextStep;
            _nextStep = null;
            next.Invoke();
        }

        /// <summary>
        /// 检查当前是否有活动的选项显示
        /// </summary>
        /// <returns>是否有活动选项</returns>
        public bool HasActiveOptions()
        {
            return _choiceBox != null && _choiceBox.activeSelf;
        }

        public void OnLocalizationChanged(string value)
        {
            _textParam = JsonUtil.ReadBeanByText<TextParam>(value);
            var tmp = _dialogText.GetComponent<TMP_Text>();
            // 修改对话文本
            tmp.characterSpacing = _textParam.charSpace;
        }

        /// <summary>
        /// 展示选项
        /// </summary>
        /// <param name="dialogueOptions">对话选项</param>
        public void ShowOptions(DialogOption[] dialogueOptions)
        {
            gameObject.SetActive(true);
            // 没有选择框直接不显示选项
            if (!_choiceBox)
            {
                return;
            }

            // 把原有对话清掉
            ClearBox();
            _choiceBox.SetActive(true);
            _dialogText.gameObject.SetActive(false);
            HideActorName();

            // 销毁原来的按钮
            foreach (Transform child in _choiceBox.transform)
            {
                Destroy(child.gameObject);
            }

            // 生成新按钮
            foreach (var option in dialogueOptions)
            {
                if (!option.IsAvailable) continue;

                var choiceInstance = Instantiate(choiceButtonPrefab, _choiceBox.transform);
                var optionText = choiceInstance.GetComponentInChildren<TextMeshProUGUI>();
                optionText.text = option.Line;
                optionText.characterSpacing = _textParam.charSpace;
                choiceInstance.GetComponent<Button>().onClick.AddListener(() =>
                {
                    HideDialog();
                    option.Select();
                });
            }
        }

        /// <summary>
        /// 尝试跳过对话
        /// true说明成功快进了对话显示
        /// false说明对话已经显示完成了，可以跳过
        /// </summary>
        /// <returns></returns>
        public bool TrySkipLine(bool isForceSkip)
        {
            if (_dialogText.isShowingText)
            {
                _dialogText.SkipTypewriter();
                return true;
            }

            _nextArray.gameObject.SetActive(false);
            return false;
        }

        private void ClearBox()
        {
            gameObject.SetActive(true);
            _dialogText?.ShowText("");
            _nextArray?.SetActive(false);
            if (!_actorName) _actorName.text = "";
        }

        private void ShowActorName(CharacterVo character)
        {
            if (!_actorName) return;

            if (string.IsNullOrWhiteSpace(character.key))
            {
                _actorName.transform.parent.gameObject.SetActive(false);
            }
            else
            {
                _actorName.transform.parent.localPosition =
                    character.key == "me" ? new Vector3(310, 95, 0) : new Vector3(-458, 95, 0);

                _actorName.transform.parent.gameObject.SetActive(true);
                _actorName.text = character.GetActorName();
            }
        }

        private void HideActorName()
        {
            _actorName.transform.parent.gameObject.SetActive(false);
        }
    }
}