using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Rendering.PostProcessing;

public class NOSController : MonoBehaviour
{
    [Header("NOS Settings")]
    [SerializeField] float CurrentNOS = 0f;
    [SerializeField] float chargeSpeed = 1f;
    [SerializeField] float depletionSpeed = 1f;
    [SerializeField] float boostAcceleration = 40f;
    [SerializeField] float audioVolume = 0.5f;

    [Header("Audio")]
    [SerializeField] AudioSource boostAudio = null;

    [Header("Visuals")]
    [SerializeField] PostProcessVolume postProcessVolume;

    [Header("Boost Effects")]
    [SerializeField] private GameObject[] nosParticles;
    public bool _isBoosting { get; private set; }

    private VehicleController _vehicle;
    private Image _boostBarFill;
    private Button _boostButton;
    private LensDistortion lensDistortion;
    private ChromaticAberration chromaticAberration;
    private CameraController cameraController;

    private void Start()
    {
        _vehicle = GetComponent<VehicleController>();
        cameraController = Camera.main.GetComponent<CameraController>();

        // Only assign UI for player car
        if (_vehicle != null && !_vehicle.AIControlled)
        {
            _boostBarFill = GameUIManager.Instance.boostBarFill;
            _boostButton = GameUIManager.Instance.boostButton;

            _boostButton.onClick.RemoveAllListeners();
            _boostButton.onClick.AddListener(() => ActivateNOS(true));
        }

        // Setup boost audio
        if (boostAudio != null)
        {
            boostAudio.playOnAwake = false;
            boostAudio.loop = true;
            boostAudio.volume = audioVolume;
        }

        // Assign post-processing effects if volume is assigned
        if (postProcessVolume != null)
        {
            postProcessVolume.profile.TryGetSettings(out lensDistortion);
            postProcessVolume.profile.TryGetSettings(out chromaticAberration);

            if (lensDistortion != null)
            {
                lensDistortion.active = true;
                lensDistortion.intensity.value = 0f;
            }

            if (chromaticAberration != null)
            {
                chromaticAberration.active = true;
                chromaticAberration.intensity.value = 0f;
            }
        }
    }

    private void FixedUpdate()
    {
        if (_vehicle == null) return;

        if (!_vehicle.nosActive)
        {
            CurrentNOS = Mathf.Min(100f, CurrentNOS + Time.fixedDeltaTime * (chargeSpeed * _vehicle.LocalVelocity.z / 30f));
        }
        else
        {
            CurrentNOS = Mathf.Max(0f, CurrentNOS - Time.fixedDeltaTime * depletionSpeed);

            if (CurrentNOS <= 0f)
                ActivateNOS(false);
        }

        // Update UI only for player car
        if (_vehicle != null && !_vehicle.AIControlled && _boostBarFill != null)
        {
            _boostBarFill.fillAmount = CurrentNOS / 100f;
        }

        // Boost audio
        if (boostAudio != null)
        {
            if (_vehicle.nosActive && CurrentNOS > 0f)
            {
                if (!boostAudio.isPlaying) boostAudio.Play();
            }
            else
            {
                if (boostAudio.isPlaying) boostAudio.Stop();
            }
        }

        // Lens Distortion
        if (lensDistortion != null)
        {
            float targetDistortion = (_vehicle.nosActive && CurrentNOS > 0f) ? -20f : 0f;
            lensDistortion.intensity.value = Mathf.Lerp(lensDistortion.intensity.value, targetDistortion, Time.deltaTime * 5f);
        }

        // Chromatic Aberration
        if (chromaticAberration != null)
        {
            float targetChromatic = (_vehicle.nosActive && CurrentNOS > 0f) ? 1f : 0f;
            chromaticAberration.intensity.value = Mathf.Lerp(chromaticAberration.intensity.value, targetChromatic, Time.deltaTime * 5f);
        }
    }

    public void ActivateNOS(bool active)
    {
        _isBoosting = active;

        // Update camera FOV
        if (cameraController != null)
            cameraController.SetBoosting(active);

        // Toggle particle systems
        if (nosParticles != null)
        {
            foreach (var ps in nosParticles)
            {
                ps.SetActive(active);
            }
        }

        // Activate boost logic
        if (active)
        {
            if (CurrentNOS <= 0f) return;
            _vehicle.ActivateNOS(true, boostAcceleration);
        }
        else
        {
            _vehicle.ActivateNOS(false);
        }
    }

    // Assign PostProcessVolume after instantiating the car
    public void SetPostProcessVolume(PostProcessVolume volume)
    {
        postProcessVolume = volume;

        if (postProcessVolume != null)
        {
            postProcessVolume.profile.TryGetSettings(out lensDistortion);
            postProcessVolume.profile.TryGetSettings(out chromaticAberration);

            if (lensDistortion != null)
            {
                lensDistortion.active = true;
                lensDistortion.intensity.value = 0f;
            }

            if (chromaticAberration != null)
            {
                chromaticAberration.active = true;
                chromaticAberration.intensity.value = 0f;
            }
        }
    }
}