using UnityEngine;
using UnityEngine.Rendering.HighDefinition;
using UnityEngine.Playables;
using System.Collections;
using UnityEngine.Animations.Rigging;
using System.Text.RegularExpressions;

public class CandleController : MonoBehaviour
{
    [Header("References")]
    [SerializeField] private GameObject candleMesh;
    public Light candleLight;
    [SerializeField] private HDAdditionalLightData lightData;

    [Header("Candle Settings")]
    [SerializeField] private float maxCandleLife = 100f;
    [SerializeField] private float lightIntensity = 200f;
    [SerializeField] private float _candleLife;
    [SerializeField] private float _candleSecondsToTurnOffWhenRunning = 0.3f;

    public bool canUseCandle = true;
    public bool isUsingCandle;
    public bool canToggleCandle;
    public bool isSettingOnFireCandle;
    private bool _isCandleOn = false;

    [SerializeField] private PlayableDirector candleLitPlayable;

    [SerializeField] private GameObject matchGO;
    [SerializeField] private ParticleSystem matchFlame;
    [SerializeField] private ParticleSystem candleFlame;

    Coroutine IsRunningTimerCoroutine;

    [Header("Inverse Kinematics")]
    [SerializeField] private float multiAimConstraintTransitionDuration = 1;
    [SerializeField] MultiAimConstraint multiAimConstraintPlayersRightHand;
    private Coroutine TransitionWeightToAimingCandleLightCoroutine;
    private Coroutine TransitionWeightToNotAimingCandleLightCoroutine;

    private static CandleController _instance;
    public static CandleController GetInstance() => _instance;

    public bool isCandleOn => _isCandleOn;
    public float candleLife => _candleLife;

    private void Awake()
    {
        if (_instance == null)
            _instance = this;
    }

    private void Start()
    {
        _candleLife = maxCandleLife;
        if (candleLight != null)
        {
            candleLight.enabled = false;
            lightData = candleLight.GetComponent<HDAdditionalLightData>();
            lightData.intensity = lightIntensity;
        }

        if (candleMesh != null)
        {
            candleMesh.SetActive(false);
        }

        matchGO.SetActive(false);

        InitialSetup();

        StartCoroutine(AfterGameLoaded());
    }

    void InitialSetup()
    {
        GameObject playerGo = PlayerManager.GetInstance().playerGameObj;
        if (multiAimConstraintPlayersRightHand == null)
        {
            multiAimConstraintPlayersRightHand = playerGo.transform.Find("MainCharacter/Rig 1/CandleLight_MultiAimConstraint").GetComponent<MultiAimConstraint>();
        }
        else
        {
            Debug.LogError("No multiAimConstraintPlayersRightHand found in the scene.");
        }

    }

    IEnumerator AfterGameLoaded()
    {
        yield return new WaitUntil(() => LoadManager.GetInstance() != null && !LoadManager.GetInstance().LoadingGame);
        yield return new WaitUntil(() => PlayerManager.GetInstance() != null);
        PlayerManager.GetInstance()._PlayerMovement.OnRunning += IsRunningStartCandleTurnOffTimer;
        PlayerManager.GetInstance()._PlayerMovement.OnStoppedRunning += IsRunningStopCandleTurnOffTimer;
        InitialSetup();
    }

    private void OnDisable()
    {
        PlayerManager.GetInstance()._PlayerMovement.OnRunning -= IsRunningStartCandleTurnOffTimer;
        PlayerManager.GetInstance()._PlayerMovement.OnStoppedRunning -= IsRunningStopCandleTurnOffTimer;
    }

    private void Update()
    {
        if (GameProgressManager.GetInstance().CandleHolderIsObtained)
        {
            if (Input.GetKeyDown(KeyCode.F) && !isSettingOnFireCandle)
            {
                UseCandleHolder();
            }


            if (canToggleCandle && _candleLife > 0f)
            {
                if (Input.GetKeyDown(KeyCode.R))
                {
                    if (_isCandleOn == false)
                    {
                        TransitionWeightToNotAimingCandleLight();
                        isSettingOnFireCandle = true;
                        candleLitPlayable.Play();
                        PlayerManager.GetInstance()._PlayerMovement._CharacterAnimator.SetBool("CandleIdle", false);
                        PlayerManager.GetInstance()._PlayerMovement._CharacterAnimator.SetBool("IsLitCandle", true);
                        //ToggleCandle();
                        CanNotToggleCandle();
                        print("Play candle lit playable");
                    }
                    //else
                    //{
                    //    PlayerManager.GetInstance()._PlayerMovement._CharacterAnimator.SetBool("IsUsingCandle", false);
                    //    PlayerManager.GetInstance()._PlayerMovement._CharacterAnimator.SetBool("IsLitCandle", false);
                    //    _isCandleOn = false;
                    //}
                }
            }

            if (_isCandleOn)
            {
                _candleLife -= Time.deltaTime;
                if (_candleLife <= 0f)
                {
                    _candleLife = 0f;
                    TurnOffCandle();
                }
            }

            RaycastHit hit;
            Vector3 forward = FlashlightRaycast.GetInstance().flashlightRaycast.forward;
            if (isUsingCandle && canToggleCandle)
            {
                if (Physics.Raycast(FlashlightRaycast.GetInstance().flashlightRaycast.transform.position, forward, out hit, 0.5f, FlashlightRaycast.GetInstance().collisionLayer, QueryTriggerInteraction.Ignore))
                {
                    FlashlightRaycast.GetInstance().flashlightCurrentCollider = hit.collider.transform;

                    if (hit.collider)
                    {
                        if (!PlayerManager.GetInstance()._PlayerMovement._CharacterAnimator.GetBool("IsWallInFront"))
                        {
                            TransitionWeightToNotAimingCandleLight();
                            PlayerManager.GetInstance()._PlayerMovement._CharacterAnimator.SetBool("IsWallInFront", true);
                        }
                    }
                    //print("Found an object - distance: " + hit.distance);
                }
                else
                {
                    FlashlightRaycast.GetInstance().flashlightCurrentCollider = null;
                    if (PlayerManager.GetInstance()._PlayerMovement._CharacterAnimator.GetBool("IsWallInFront"))
                    {
                        TransitionWeightToAimingCandleLight();
                        PlayerManager.GetInstance()._PlayerMovement._CharacterAnimator.SetBool("IsWallInFront", false);
                    }
                }
                //Vector3 forward = transform.TransformDirection(Vector3.forward) * 0.5f;
                Debug.DrawRay(transform.position, forward * 0.5f, Color.green);
            }
        }
    }

    public void UseCandleHolder() 
    {
        if (canUseCandle)
        {
            if (!isUsingCandle)
            {
                candleMesh.SetActive(true);
                canToggleCandle = false;
                PlayerManager.GetInstance()._PlayerMovement._CharacterAnimator.SetBool("IsUsingCandle", true);
                PlayerManager.GetInstance()._PlayerMovement._CharacterAnimator.SetBool("CandleIdle", true);
                StartCoroutine(CanUseAndToggleCandleAfterSeconds(true, true));
                TransitionWeightToAimingCandleLight();
                isUsingCandle = true;
                canUseCandle = false;
            }
            else
            {
                canToggleCandle = false; 
                PlayerManager.GetInstance()._PlayerMovement._CharacterAnimator.SetBool("IsUsingCandle", false);
                PlayerManager.GetInstance()._PlayerMovement._CharacterAnimator.SetBool("CandleIdle", false);
                PlayerManager.GetInstance()._PlayerMovement._CharacterAnimator.SetBool("IsLitCandle", false);
                StartCoroutine(CanUseAndToggleCandleAfterSeconds(true, false));
                StopCandleFlameParticle();
                TurnOffCandle();
                isUsingCandle = false;
                canUseCandle = false;
            }
        }
    }

    public void IsRunningStartCandleTurnOffTimer() 
    {
        PlayerManager.GetInstance()._PlayerMovement._CharacterAnimator.SetBool("CandleIdleRunning", true);
        if(IsRunningTimerCoroutine == null) 
        {
            IsRunningTimerCoroutine = StartCoroutine(IsRunningTimer());
        }
    }

    public void IsRunningStopCandleTurnOffTimer()
    {
        PlayerManager.GetInstance()._PlayerMovement._CharacterAnimator.SetBool("CandleIdleRunning", false);
        if (IsRunningTimerCoroutine != null)
        {
            StopCoroutine(IsRunningTimerCoroutine);
            print("Stopped Running timer turn off candle");
            IsRunningTimerCoroutine = null;
        }
    }

    IEnumerator IsRunningTimer() 
    {
        yield return new WaitForSeconds(_candleSecondsToTurnOffWhenRunning);
        TurnOffCandle();
        print("Player sprinted for: " + _candleSecondsToTurnOffWhenRunning + " seconds so the candle turned Off");
    }

    IEnumerator CanUseAndToggleCandleAfterSeconds(bool canUseCandle, bool canToggleCandle) 
    {
        yield return new WaitForSeconds(1f);
        if (canToggleCandle)
        {
            CanToggleCandle();
        }
        else 
        {
            CanNotToggleCandle();
        }
        if (canUseCandle)
        {
            CanUseCandle();
        }
        else
        {
            CanNotUseCandle();
        }
    }

    public void PlayMatchFlameParticle() 
    {
        matchGO.SetActive(true);
        matchFlame.Play();
    }

    public void StopMatchFlameParticle()
    {
        matchFlame.Stop();
        matchGO.SetActive(false);
    }

    public void PlayCandleFlameParticle()
    {
        candleFlame.Play();
    }

    public void StopCandleFlameParticle()
    {
        candleFlame.Stop();
    }

    public void CanToggleCandle() 
    {
        canToggleCandle = true;
    }

    public void CanNotToggleCandle()
    {
        canToggleCandle = false;
    }

    public void CanUseCandle()
    {
        canUseCandle = true;
    }

    public void CanNotUseCandle()
    {
        canUseCandle = false;
    }

    public void SetAnimatorBoolCandleIdle(bool CandleIdle)
    {
        PlayerManager.GetInstance()._PlayerMovement._CharacterAnimator.SetBool("CandleIdle", CandleIdle);
    }
    public void SetAnimatorBoolIsLitCandle(bool IsLitCandle)
    {
        PlayerManager.GetInstance()._PlayerMovement._CharacterAnimator.SetBool("IsLitCandle", IsLitCandle);
        isSettingOnFireCandle = false;
    }

    public void ToggleCandle()
    {
        if (_isCandleOn)
            TurnOffCandle();
        else
            TurnOnCandle();
    }

    public void TurnOnCandle()
    {
        if (_candleLife <= 0f) return;

        _isCandleOn = true;
        candleLight.enabled = true;
        TransitionWeightToAimingCandleLight();
        if (candleMesh != null)
            candleMesh.SetActive(true);
    }

    public void TurnOffCandle()
    {
        _isCandleOn = false;
        candleLight.enabled = false;
        candleFlame.Stop();
        TransitionWeightToNotAimingCandleLight();
        PlayerManager.GetInstance()._PlayerMovement._CharacterAnimator.SetBool("IsWallInFront", false);
    }

    public void TransitionWeightToAimingCandleLight() 
    {
        TransitionWeightToAimingCandleLightCoroutine = StartCoroutine(TransitionWeightAimingCandleLight(multiAimConstraintPlayersRightHand.weight, 1, 2));
        if (TransitionWeightToNotAimingCandleLightCoroutine != null)
        {
            StopCoroutine(TransitionWeightToNotAimingCandleLightCoroutine);
            TransitionWeightToNotAimingCandleLightCoroutine = null;
        }
    }
    public void TransitionWeightToNotAimingCandleLight()
    {
        TransitionWeightToNotAimingCandleLightCoroutine = StartCoroutine(TransitionWeightAimingCandleLight(multiAimConstraintPlayersRightHand.weight, 0, 2));
        if (TransitionWeightToAimingCandleLightCoroutine != null)
        {
            StopCoroutine(TransitionWeightToAimingCandleLightCoroutine);
            TransitionWeightToAimingCandleLightCoroutine = null;
        }
    }

    public void ReduceCandleLife(float amount)
    {
        _candleLife = Mathf.Max(0f, _candleLife - amount);
        if (_candleLife == 0f)
            TurnOffCandle();
    }

    public void RefillCandle(float amount)
    {
        _candleLife = Mathf.Clamp(_candleLife + amount, 0f, maxCandleLife);
    }

    public void FullyRefillCandle()
    {
        _candleLife = maxCandleLife;
    }

    public float GetCandleLifePercent()
    {
        return _candleLife / maxCandleLife;
    }

    private IEnumerator TransitionWeightAimingCandleLight(float startWeight, float targetWeight, float speed)
    {
        float elapsedTime = 0f;

        while (elapsedTime < multiAimConstraintTransitionDuration)
        {
            elapsedTime += Time.deltaTime;
            float t = Mathf.Clamp01(elapsedTime / multiAimConstraintTransitionDuration);
            multiAimConstraintPlayersRightHand.weight = Mathf.Lerp(startWeight, targetWeight, speed * t);
            yield return null;
        }

        // Ensure the target weight is reached precisely
        multiAimConstraintPlayersRightHand.weight = targetWeight;
        //canPressButtonToOpenOrCloseFlashlight = true;
        if (!isUsingCandle)
        {
            candleMesh.SetActive(false);
        }
    }
}