using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
using Yarn.Unity;

namespace AibisDream
{
    public class DialogController : Singleton<DialogController>
    {
        private DialogueRunner dialogueRunner;

        private VariableStorageBehaviour _variableStorage;

        private Dictionary<string, Action<YarnOption[]>> commandMap = new();

        private bool _isTalking;

        public bool IsTalking
        {
            set
            {
                if (_isTalking == value) return;

                _isTalking = value;
                if (value)
                {
                    OnDialogueStart?.Invoke();
                }
                else
                {
                    OnDialogueComplete?.Invoke();
                }
            }
        }

        public static UnityAction OnDialogueStart;
        public static UnityAction OnDialogueComplete;

        public bool quickRunMode;

        private void Start()
        {
            dialogueRunner = GetComponentInChildren<DialogueRunner>();
            _variableStorage = GetComponentInChildren<InMemoryVariableStorage>();
            
            dialogueRunner.onDialogueStart.AddListener(() => { OnDialogueStart?.Invoke(); });
            dialogueRunner.onDialogueComplete.AddListener(() => { OnDialogueComplete?.Invoke(); });
            dialogueRunner.AddCommandListener(_ => { IsTalking = false; });
        }

        #region 变量操作

        public bool TryGetVariable<T>(string variableName, out T result)
        {
            return _variableStorage.TryGetValue(variableName, out result);
        }

        public void SetVariable(string variableName, string value)
        {
            _variableStorage.SetValue(variableName, value);
        }

        public void SetVariable(string variableName, bool value)
        {
            _variableStorage.SetValue(variableName, value);
        }

        public void SetVariable(string variableName, float value)
        {
            _variableStorage.SetValue(variableName, value);
        }

        #endregion

        /// <summary>
        /// 开启对话
        /// </summary>
        /// <param name="yarnProject">Yarn组</param>
        public void StartDialog(YarnProject yarnProject)
        {
            dialogueRunner.SetProject(yarnProject);
            dialogueRunner.StartDialogue("Start");
        }

        /// <summary>
        /// 调用命令
        /// </summary>
        /// <param name="commandName">命令名</param>
        /// <param name="options">选项</param>
        public void InvokeOptionCommand(string commandName, YarnOption[] options)
        {
            if (commandName == null)
            {
                Debug.Log("命令名为空");
                return;
            }

            if (commandMap.TryGetValue(commandName, out var action))
            {
                action(options);
            }
            else
            {
                Debug.LogWarning($"命令 {commandName} 不存在");
            }
        }

        /// <summary>
        /// 注册命令
        /// </summary>
        /// <param name="commandName">命令名称</param>
        /// <param name="commandAction">注册名称</param>
        public void RegisterOptionCommand(string commandName, Action<YarnOption[]> commandAction)
        {
            if (commandMap.ContainsKey(commandName))
            {
                Debug.Log($"命令 {commandName} 已经存在，将被替换");
            }
            
            commandMap[commandName] = commandAction;
        }

        /// <summary>
        /// 移除命令
        /// </summary>
        /// <param name="commandName">命令名称</param>
        public void RemoveOptionCommand(string commandName)
        {
            if (commandMap.ContainsKey(commandName))
            {
                commandMap.Remove(commandName);
            }
            else
            {
                Debug.Log($"命令 {commandName} 不存在");
            }
        }

        #region 命令名

        [YarnCommand("switch_tv")]
        public static void SwitchTV(string picName)
        {
            MainUIController.Instance.SwitchTV(picName);
        }

        [YarnCommand("indoor")]
        public static void Indoor(float duration = 1)
        {
            MainUIController.Instance.TVFadeOut(duration);
        }

        /// <summary>
        /// 角色初始化
        /// </summary>
        /// <param name="picName">角色图片名</param>
        [YarnCommand("character_init")]
        public static void CharacterInit(string picName)
        {
            MainSceneController.Instance.Guest.SwitchImage(picName);
            MainSceneController.Instance.Guest.Show();
        }

        [YarnCommand("character_switch_image")]
        public static void CharacterSwitchImage(string picPath)
        {
            // TODO 统一路径后就不用路径做参数了
            MainSceneController.Instance.Guest.SwitchImage(picPath);
        }

        [YarnCommand("character_fade_in")]
        public static IEnumerator CharacterFadeIn(float duration = 1)
        {
            return MainSceneController.Instance.Guest.FadeInSync(duration);
        }

        [YarnCommand("character_fade_Out")]
        public static IEnumerator CharacterFadeOut(float duration = 1)
        {
            return MainSceneController.Instance.Guest.FadeOutSync(duration);
        }

        [YarnCommand("character_move_to_fix")]
        public static IEnumerator CharacterMoveToFix()
        {
            return MainSceneController.Instance.MoveToFix();
        }

        [YarnCommand("load_scene")]
        public static IEnumerator LoadScene(string sceneName, float duration = 1)
        {
            HideDialog();
            yield return MainUIController.Instance.FadeInSync(duration);
            yield return SceneLoader.Instance.LoadSceneAsync(sceneName);
            yield return MainUIController.Instance.FadeOutSync(duration);
        }

        [YarnCommand("unload_scene")]
        public static IEnumerator UnloadScene(string sceneName)
        {
            yield return SceneLoader.Instance.UnloadSceneAsync(sceneName);
        }

        [YarnCommand("hide_dialog")]
        public static void HideDialog()
        {
            DialogUiViewer.Instance.HideDialog();
        }

        [YarnCommand("fade_in")]
        public static IEnumerator FadeIn(float duration)
        {
            return MainUIController.Instance.FadeInSync(duration);
        }

        [YarnCommand("fade_out")]
        public static IEnumerator FadeOut(float duration)
        {
            return MainUIController.Instance.FadeOutSync(duration);
        }
        
        [YarnCommand("fade_in")]
        public static IEnumerator FadeIn()
        {
            return MainUIController.Instance.FadeInSync(1);
        }

        [YarnCommand("fade_out")]
        public static IEnumerator FadeOut()
        {
            return MainUIController.Instance.FadeOutSync(1);
        }

        #endregion
    }
}