using System;
using DG.Tweening;
using SLSFramework.General;
using Unity.Cinemachine;
using UnityEngine;
using UnityEngine.InputSystem;
using UnityEngine.Serialization;
using Ease = DG.Tweening.Ease;

namespace Cielonos.MainGame.Characters
{
    public class PlayerViewSubcontroller : SubcontrollerBase<Player>, IPlayerSubcontroller
    {
        public Player player => owner;
        
        public Camera playerCamera;
        public Transform cameraRoot;
        public CinemachineStateDrivenCamera stateDrivenCamera;
        public CinemachineCamera freeLookCamera;
        public CinemachineCamera lockOnCamera;
        [FormerlySerializedAs("isLockedOn")] public bool isLockingTarget = false;
        public bool isLockedSetRoot;
        public CharacterBase testEnemy;
        public Transform testEnemyTarget;
        
        public CameraRotationSubmodule cameraRotationSm;
        public OcclusionFadeSubmodule occlusionFadeSm;

        public override void Initialize()
        {
            base.Initialize();
            cameraRotationSm = new CameraRotationSubmodule(this, player.transform.eulerAngles.y);
            occlusionFadeSm = new OcclusionFadeSubmodule(this);
        }

        private void Start()
        {
            testEnemyTarget = testEnemy.bodyPartsSc.staticCenterPoint;
            //SwitchToLockTarget( testEnemyTarget );
        }

        private void Update()
        {
            if (Keyboard.current.tabKey.wasPressedThisFrame)
            {
                if (!isLockingTarget)
                {
                    SwitchToLockTarget( testEnemyTarget );
                }
                else
                {
                    SwitchToFreeLook();
                }
            }
        }

        private void LateUpdate()
        {
            cameraRotationSm.Update();
            
            if (!isLockingTarget)
            {
                
            }
            else
            {
                if(isLockedSetRoot) cameraRoot.LookAt(testEnemyTarget);
                float distance = (testEnemyTarget.position - cameraRoot.transform.position).Flatten().magnitude;
                if(distance < 1f) SwitchToFreeLook();
            }
            occlusionFadeSm.Update();
        }
        
        void SwitchToLockTarget(Transform target)
        {
            testEnemyTarget = target;
            isLockingTarget = true;
            isLockedSetRoot = false;

            // --- CM3 核心操作 ---
            // 1. 设置 LookAt 目标。在 CM3 中，LookingAt 是 Target 结构体的一部分，或者直接赋值给 LookAt 属性
            lockOnCamera.Target.LookAtTarget = testEnemyTarget;
        
            // 2. 提高优先级，激活锁定相机
            stateDrivenCamera.GetComponent<Animator>().SetBool("isLockTarget", true);
            cameraRoot.DOLookAt(testEnemyTarget.position, 0.5f).SetEase(Ease.InOutSine).OnComplete(()=>isLockedSetRoot = true).Play();
            
            // (可选) 你可以在这里播放锁定音效或显示 UI 准星
            Debug.Log($"Locked on: {target.name}");
        }
        
        void SwitchToFreeLook()
        {
            cameraRotationSm.SyncRotationWithCamera(playerCamera);
            
            isLockingTarget = false;
            
            // --- CM3 核心操作 ---
            // 1. 重置 LookAt 目标
            //lockOnCamera.Target.LookAtTarget = null;
        
            // 2. 降低优先级，切换回自由视角相机
            stateDrivenCamera.GetComponent<Animator>().SetBool("isLockTarget", false);
        
            // (可选) 你可以在这里播放解锁音效或隐藏 UI 准星
            Debug.Log("Switched to Free Look");
        }
        
    }
}