/*
* @Author: 白哉
* @Description: 
* @Date: 2025年09月05日 星期五 15:09:36
* @Modify: 
*/


using System.Collections.Generic;
using System.IO;
using Logic.CrashSight;
using MemoryPack;
using TH1_Logic.Tools;
using TMPro;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;


namespace Logic
{
    public class InputConfigManager
    {
        public static InputConfigManager Instance = new InputConfigManager();
        
        private InputConfig _config;
        private List<KeyCode> _pressedKeys = new List<KeyCode>();
        private bool _isListening = false;
        private float _waitTime = 0.2f; // 等待时间，防止误触
        private float _lastKeyPressTime;
        private InputEnum _curInputEnum;
        private Dictionary<InputEnum, List<System.Action>> _inputCallBack;
        public InputConfig Config => _config;
        public bool IsListening => _isListening;

        
        public void Init()
        {
            RefreshInputConfig();
            _config.Init();
            _inputCallBack = new Dictionary<InputEnum, List<System.Action>>();
        }
        
        // 开始监听按键绑定, UI 调用开始记录输入
        public void StartRecordInput(InputEnum inputEnum)
        {
            if (_isListening) return;
            _curInputEnum = inputEnum;
            _isListening = true;
            _pressedKeys.Clear();
        }
        
        // 外部获取状态使用, 游戏逻辑用
        public bool IsActive(InputEnum inputEnum)
        {
            if (_config == null) return false;
            var keyConfig = _config.GetInputKeyConfig(inputEnum);
            if (keyConfig == null) return false;
            return keyConfig.IsActive;
        }
        
        // 注册输入回调
        public void RegisterInputCallback(InputEnum inputEnum, System.Action callback)
        {
            if (!_inputCallBack.ContainsKey(inputEnum))
            {
                _inputCallBack[inputEnum] = new List<System.Action>();
            }
            _inputCallBack[inputEnum].Add(callback);
        }
        
        public void RefreshInputConfig()
        {
            if (_config != null) return;

            string path = Application.persistentDataPath + "/../Config/input_config.dat";
            string backupPath = path + ".bak";

            // 尝试读取主文件
            _config = FileTools.TryDeserializeFile<InputConfig>(path);

            // 主文件损坏，尝试从备份恢复
            if (_config == null && File.Exists(backupPath))
            {
                LogSystem.LogInfo("[InputConfig] 主文件损坏，尝试从备份恢复...");
                _config = FileTools.TryDeserializeFile<InputConfig>(backupPath);

                if (_config != null)
                {
                    LogSystem.LogInfo("[InputConfig] 从备份恢复成功");
                    try
                    {
                        byte[] bytes = MemoryPackSerializer.Serialize(_config);
                        FileTools.SafeWriteFile(path, bytes);
                    }
                    catch (System.Exception e)
                    {
                        LogSystem.LogError($"[InputConfig] 恢复写入主文件失败: {e.Message}");
                    }
                }
                else
                {
                    LogSystem.LogError("[InputConfig] 备份文件也已损坏，将重置数据");
                }
            }

            _config ??= new InputConfig();
        }
        
        // 保存输入配置
        public void SaveInputConfig()
        {
            if (_config == null) return;
            byte[] bytes = MemoryPackSerializer.Serialize(_config);
            FileTools.SafeWriteFile(Application.persistentDataPath + "/../Config/input_config.dat", bytes);
        }

        // 每帧调用，返回绑定结果（null表示还在监听中）
        public void Update()
        {
            UpdateConfigListening();
            if (InputTextFocusUtility.IsTextInputFocused())
            {
                ClearInputActiveState();
                return;
            }
            UpdateConfigActive();
        }

        private void ClearInputActiveState()
        {
            if (_config?.InputKeyConfigs == null) return;
            foreach (var keyConfig in _config.InputKeyConfigs)
                keyConfig.IsActive = false;
        }
        
        private void UpdateConfigListening()
        {
            if (!_isListening) return;

            // 检测所有按下的键
            foreach (KeyCode key in System.Enum.GetValues(typeof(KeyCode)))
            {
                if (key == KeyCode.None) continue;
                
                if (Input.GetKeyDown(key))
                {
                    if (!_pressedKeys.Contains(key))
                    {
                        _pressedKeys.Add(key);
                        _lastKeyPressTime = Time.time;
                    }
                }
            }

            // 检查是否所有键都已释放
            if (_pressedKeys.Count > 0)
            {
                bool allReleased = true;
                foreach (var key in _pressedKeys)
                {
                    if (Input.GetKey(key))
                    {
                        allReleased = false;
                        break;
                    }
                }

                if (_pressedKeys.Count >= 3) allReleased = true;
                // 所有键释放后，确认绑定
                if (allReleased && Time.time - _lastKeyPressTime > _waitTime)
                {
                    _isListening = false;
                    _config?.SetInputKeyConfig(_curInputEnum, _pressedKeys);
                    SaveInputConfig();
                    // TODO 这里可以调用 UI 刷新，因为配置发生了变化
                }
            }
        }

        private void UpdateConfigActive()
        {
            if (_config == null || _isListening) return;

            foreach (var keyConfig in _config.InputKeyConfigs)
            {
                keyConfig.IsActive = IsKeyCombinationActive(keyConfig.KeyCodes);
                if (IsKeyCombinationTriggered(keyConfig.KeyCodes)) OnInputCallback(keyConfig.InputType);
            }
        }
        
        // 检查组合键是否被激活
        private bool IsKeyCombinationActive(List<KeyCode> keyCodes)
        {
            for (int i = 0; i < keyCodes.Count; i++)
            {
                if (!Input.GetKey(keyCodes[i]))
                    return false;
            }

            return true;
        }

        // 检查组合键是否被触发
        private bool IsKeyCombinationTriggered(List<KeyCode> keyCodes)
        {
            if (keyCodes == null || keyCodes.Count == 0) return false;

            // 单键情况
            if (keyCodes.Count == 1)
            {
                return Input.GetKeyDown(keyCodes[0]);
            }

            // 组合键：前面的键必须按住，最后一个键检测 GetKeyDown
            for (int i = 0; i < keyCodes.Count - 1; i++)
            {
                if (!Input.GetKey(keyCodes[i]))
                    return false;
            }

            return Input.GetKeyDown(keyCodes[^1]);
        }
        
        // 输入触发时的回调
        private void OnInputCallback(InputEnum inputEnum)
        {
            LogSystem.LogInfo($"触发 {inputEnum}");
            if (_inputCallBack != null && _inputCallBack.TryGetValue(inputEnum, out var callbackList))
            {
                foreach (var callback in callbackList)
                {
                    callback?.Invoke();
                }
            }
        }
    }

    public static class InputTextFocusUtility
    {
        public static bool IsTextInputFocused()
        {
            var selected = EventSystem.current?.currentSelectedGameObject;
            if (selected == null) return false;

            return IsFocusedInputField(selected.GetComponent<TMP_InputField>())
                   || IsFocusedInputField(selected.GetComponentInParent<TMP_InputField>())
                   || IsFocusedInputField(selected.GetComponent<InputField>())
                   || IsFocusedInputField(selected.GetComponentInParent<InputField>());
        }

        private static bool IsFocusedInputField(TMP_InputField inputField)
        {
            return inputField != null && inputField.isActiveAndEnabled && inputField.isFocused;
        }

        private static bool IsFocusedInputField(InputField inputField)
        {
            return inputField != null && inputField.isActiveAndEnabled && inputField.isFocused;
        }
    }
}