using System.Collections;
using UnityEngine;
using UnityEngine.Rendering.HighDefinition;

public class CandleBurnSystem : MonoBehaviour
{
    [Header("Raycast Settings")]
    public float burnDistance = 10f;
    public LayerMask eyeLayer;

    [Header("Candle Settings")]
    public float timeToBurn = 4.5f;
    public float candleLifeConsumptionRate = 1f;
    public float candleBurnWhileZoomingMultiplier = 2f;

    private bool burnStateReseted = true;
    private float currentBurnTime = 0f;
    private HallucinationsEye currentTarget;

    private Coroutine intensityCoroutine;
    private float baseIntensity;
    private bool isIntensityBoosted = false;

    private void Start()
    {
        StartCoroutine(AfterGameLoaded());
    }

    IEnumerator AfterGameLoaded()
    {
        yield return new WaitUntil(() => LoadManager.GetInstance() != null && !LoadManager.GetInstance().LoadingGame);
        baseIntensity = CandleController.GetInstance().candleLight.intensity;
    }

    private void Update()
    {
        if (CameraMovement.GetInstance().IsZooming && CandleController.GetInstance().isCandleOn)
        {
            TryBurnRaycast();
        }
        else if (!burnStateReseted)
        {
            ResetBurnState();
        }

        if (CandleController.GetInstance().isCandleOn)
        {
            var light = CandleController.GetInstance().candleLight;
            foreach (var eye in EyesManager.GetInstance().allEyes)
                eye.EvaluateLightingFrom(light.transform, light.spotAngle, light.range);
        }
    }

    private void TryBurnRaycast()
    {
        RaycastHit hit;
        var cam = Camera.main;
        if (Physics.Raycast(cam.transform.position, cam.transform.forward, out hit, burnDistance, eyeLayer))
        {
            var candidates = hit.collider.GetComponentsInParent<HallucinationsEye>();
            HallucinationsEye hitEye = null;
            foreach (var eye in candidates)
            {
                if (eye.IsAlive && eye.IsOutOfWall && eye.OwnsCollider(hit.collider))
                {
                    hitEye = eye;
                    break;
                }
            }

            if (hitEye != null && hitEye.TryGetEyeIndex(hit.collider, out int eyeIndex))
            {
                if (currentTarget != hitEye)
                {
                    if (currentTarget != null && currentTarget.IsAlive)
                        currentTarget.SetBurningState(false);
                    currentTarget = hitEye;
                    currentBurnTime = 0f;
                }

                currentBurnTime += Time.deltaTime;
                hitEye.SetBurningState(true, eyeIndex);
                float normalized = Mathf.Clamp01(currentBurnTime / timeToBurn);
                hitEye.UpdateBurnVisual(normalized, eyeIndex);

                CandleController.GetInstance().ReduceCandleLife(Time.deltaTime * candleBurnWhileZoomingMultiplier);
                hitEye.SetSmokeActive(true);
                PlayerManager.GetInstance()._PlayerMovement._CharacterAnimator.SetBool("CandleAttack", true);
                PlayerManager.GetInstance()._cameraMovement.SetShake(2f, 2f);

                if (!isIntensityBoosted)
                {
                    if (intensityCoroutine != null) StopCoroutine(intensityCoroutine);
                    intensityCoroutine = StartCoroutine(ChangeCandleIntensity(baseIntensity * 2f));
                    isIntensityBoosted = true;
                }

                if (currentBurnTime >= timeToBurn)
                {
                    hitEye.BurnEye();
                    ResetBurnState();
                }

                burnStateReseted = false;
                return;
            }
        }

        ResetBurnState(); 
    }

    private IEnumerator ChangeCandleIntensity(float targetIntensity)
    {
        Light candleLight = CandleController.GetInstance().candleLight;
        HDAdditionalLightData lightData = candleLight.GetComponent<HDAdditionalLightData>();
        float startIntensity = lightData.intensity;
        float duration = 1f;
        float elapsed = 0f;

        while (elapsed < duration)
        {
            elapsed += Time.deltaTime;
            float t = elapsed / duration;
            lightData.intensity = Mathf.Lerp(startIntensity, targetIntensity, t);
            yield return null;
        }

        lightData.intensity = targetIntensity;
    }

    private void ResetBurnState()
    {
        if (currentTarget != null && currentTarget.IsAlive)
        {
            currentTarget.SetBurningState(false);
            currentTarget.SetSmokeActive(false);
        }
        if (isIntensityBoosted)
        {
            if (intensityCoroutine != null) StopCoroutine(intensityCoroutine);
            intensityCoroutine = StartCoroutine(ChangeCandleIntensity(baseIntensity));
            isIntensityBoosted = false;
        }
        PlayerManager.GetInstance()._cameraMovement.SetShakeToDefault();
        PlayerManager.GetInstance()._PlayerMovement._CharacterAnimator.SetBool("CandleAttack", false);

        currentBurnTime = 0f;
        currentTarget = null;
        burnStateReseted = true;
    }
}