using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.InputSystem;

namespace Ether
{
    public enum DeviceType
    {
        Keyboard,
        Gamepad,
    }

    public class ReInputManager : SingletonAutoMono<ReInputManager>
    {
        ReInputActions inputActions;

        public override void Init()
        {
            inputActions = new ReInputActions();

            inputActions.PC.Enable();

            foreach (var actionMap in inputActions.asset.actionMaps)
            {
                foreach (var action in actionMap.actions)
                {
                    string rebindJson = PlayerPrefs.GetString($"ReInputSave_{action.name}");
                    if (!string.IsNullOrEmpty(rebindJson))
                    {
                        action.LoadBindingOverridesFromJson(rebindJson);
                    }
                }
            }

            inputActions.PC.Move.performed += OnMove;
            inputActions.PC.Move.canceled += OnMove;

            //int bindIndex = GetActionBindIndex(inputActions.PC.Move, "s");

            //if (bindIndex != -1)
            //{
            //    OnReBindAction(inputActions.PC.Move, bindIndex);
            //}


            InputSystem.onDeviceChange += OnDeviceChange;
        }

        private void OnMove(InputAction.CallbackContext context)
        {

            // 当输入操作被执行时调用
            Debug.Log("输入操作被执行:" + context.ReadValue<Vector2>() + "  " + context.phase);
            EventCenter.BroadCast(ReInputEvent.Move, context.ReadValue<Vector2>());
        }

        #region 按键重绑定

        /// <summary>
        /// 按键重绑定
        /// </summary>
        public void OnReBindAction(InputAction action, int bindIndex, DeviceType deviceType = DeviceType.Keyboard, Action bindingEndCallback = null)
        {
            inputActions.PC.Disable();
            Debug.Log($"当前绑定:{action.bindings[bindIndex].effectivePath}   请输入绑定按键...");

            action.PerformInteractiveRebinding(bindIndex)
                .WithControlsExcluding("<Mouse>")
                .WithControlsExcluding("<Mouse>/leftbutton")
                .WithControlsExcluding("<Mouse>/rightbutton")
                .OnMatchWaitForAnother(0.1f)
                .WithCancelingThrough("<Keyboard>/escape")
                .OnCancel((operation) =>
                {
                    inputActions.PC.Enable();
                    bindingEndCallback?.Invoke();
                    operation.Dispose();
                    operation = null;
                })
                .OnComplete((operation) =>
                {
                    inputActions.PC.Enable();

                    if (CheckDuplicateBings(action, bindIndex))
                    {
                        action.RemoveBindingOverride(bindIndex);
                        operation?.Dispose();
                        operation = null;

                        OnReBindAction(action, bindIndex);
                        return;
                    }

                    bindingEndCallback?.Invoke();

                    string mapJson = action.SaveBindingOverridesAsJson();
                    PlayerPrefs.SetString($"ReInputSave_{action.name}", mapJson);
                    Debug.Log("绑定成功：" + action.bindings[bindIndex].effectivePath);
                    operation.Dispose();
                    operation = null;
                })
                .Start();
        }

        /// <summary>
        /// 检查是否存在对应的绑定索引
        /// </summary>
        private bool CheckDuplicateBings(InputAction action, int bindIndex, bool allCompositeParts = false)
        {
            InputBinding newBinding = action.bindings[bindIndex];

            foreach (var binding in action.actionMap.bindings)
            {
                if (binding.action == newBinding.action)
                {
                    continue;
                }

                if (binding.effectivePath == newBinding.effectivePath)
                {
                    return true;
                }
            }

            if (allCompositeParts)
            {
                for (int i = 0; i < bindIndex; i++)
                {
                    if (action.bindings[i].effectivePath == newBinding.overridePath)
                    {
                        return true;
                    }
                }
            }

            return false;
        }

        /// <summary>
        /// 获取绑定索引，根据绑定的key值
        /// </summary>
        private int GetActionBindIndex(InputAction action, string bindName, DeviceType deviceType = DeviceType.Keyboard)
        {
            foreach (var ctrl in action.controls)
            {
                if (ctrl.device.name == deviceType.ToString())
                {
                    if (bindName.ToUpper() == ctrl.name.ToUpper())
                    {
                        return action.GetBindingIndexForControl(ctrl);
                    }
                }

            }
            return -1;
        }

        /// <summary>
        /// 还原绑定
        /// </summary>
        public void OnReBindReset(InputAction action, int bindIndex, DeviceType deviceType = DeviceType.Keyboard, Action bindingEndCallback = null)
        {
            inputActions.PC.Disable();
            if (CheckDuplicateBings(action, bindIndex))
            {
                action.RemoveBindingOverride(bindIndex);
                bindingEndCallback?.Invoke();
            }
        }

        #endregion

        void OnDeviceChange(InputDevice device, InputDeviceChange change)
        {
            if (change == InputDeviceChange.Added)
            {
                Debug.Log($"设备已连接: {device.name}");
            }
            else if (change == InputDeviceChange.Removed)
            {
                Debug.Log($"设备已断开: {device.name}");
            }
        }

        public void OnDestroy()
        {
            Clear();
        }

        public override void Clear()
        {
            inputActions.PC.Move.performed -= OnMove;
            inputActions.PC.Move.canceled -= OnMove;

            InputSystem.onDeviceChange -= OnDeviceChange;

        }

    }
}