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

[System.Serializable]
public class EmisssiveRendererData
{
    public Renderer renderer;
    public float maxIntensity;
}

public class LightsTransitionController : MonoBehaviour
{
    public List<EmisssiveRendererData> flickeringRenderersData; // List of Lights and their maxIntensity

    [SerializeField] private float transitionDuration = 2.0f; // Duration of light transition
    [SerializeField] private float timeBetweenLights = 1.0f; // Time between lights
    [SerializeField] private float initialIntensity = 0.0f; // Initial intensity of the lights
    [SerializeField] private float targetIntensity = 1.0f; // Target intensity of the lights
    [SerializeField] private float startIntensity = 1.0f;

    [SerializeField] private GameObject[] objectsWithLights; // List of objects with lights
    [SerializeField] private List<LampRenderersGroup> lampRenderersGroup;
    public string targetLayer = "Emissive";

    private int currentObjectIndex = 0; // Index of the current object
    private int currentLampRendererGroupIndex = 0;
    [SerializeField] private List<Light> allLights;
    [SerializeField] private Light[] currentObjectLights; // Lights in the current object
    [SerializeField] private LampRenderersGroup[] currentLampRenderersGroup;

    private void Start()
    {
        for (int i = 0; i < objectsWithLights.Length; i++)
        {
            allLights.AddRange(objectsWithLights[i].GetComponentsInChildren<Light>());
        }

        for (int i = 0; i < objectsWithLights.Length; i++)
        {
            lampRenderersGroup.Add(objectsWithLights[i].GetComponentInChildren<LampRenderersGroup>());
        }


        //StartCoroutine(TransitionLights());
    }

    public void LightsIntensityZero() 
    {
        foreach (var light in allLights)
        {
            light.intensity = 0f;
        }
        for (int i = 0; i < lampRenderersGroup.Count; i++)
        {
            foreach (var lampCapLODRenderers in lampRenderersGroup[i].lampCapLODRenderers)
            {
                lampCapLODRenderers.material.SetFloat("_EmissiveExposureWeight", 3);
            }
        }
    }

    #region Debugging
    //private void Update()
    //{
    //    if (Input.GetKeyDown(KeyCode.Alpha0))
    //    {
    //        lampRenderersGroup.Clear();
    //        StartLightsTransition();
    //    }
    //} 
    #endregion

    public void StartLightsTransition()
    {
        lampRenderersGroup.Clear();
        for (int i = 0; i < objectsWithLights.Length; i++)
        {
            lampRenderersGroup.Add(objectsWithLights[i].GetComponentInChildren<LampRenderersGroup>());
        }


        StartCoroutine(TransitionLights());
    }

    private IEnumerator TransitionLights()
    {
        while (true)
        {
            // Transition lights of the previous object
            if (currentObjectLights != null)
            {
                yield return StartCoroutine(FadeOutLights(currentObjectLights, currentLampRenderersGroup));
            }

            // Transition lights of the current object
            currentObjectLights = objectsWithLights[currentObjectIndex].GetComponentsInChildren<Light>();

            currentLampRenderersGroup[0] = lampRenderersGroup[currentLampRendererGroupIndex];


            ////I added:
            //foreach (Renderer objectsWithALLRenderes in objectsWithRenderers)
            //{
            //    if (objectsWithALLRenderes.gameObject.layer == LayerMask.NameToLayer(targetLayer))
            //    {
            //        currentObjectRenderers.Add(objectsWithALLRenderes); //So it's full of the taget layer renderes.
            //    }
            //}

            yield return StartCoroutine(TransitionObjectLights(currentObjectLights, currentLampRenderersGroup));

            // Wait before moving to the next object
            yield return new WaitForSeconds(timeBetweenLights);

            // Move to the next object
            currentObjectIndex = (currentObjectIndex + 1) % objectsWithLights.Length;
            currentLampRendererGroupIndex = (currentLampRendererGroupIndex + 1) % lampRenderersGroup.Count;
        }
    }

    private IEnumerator TransitionObjectLights(Light[] lights, LampRenderersGroup[] renderers)
    {
        foreach (Light light in lights)
        {
            // Transition current light
            foreach (var renderer in renderers)
            {
                yield return StartCoroutine(TransitionLight(light, renderer));
            }

        }
    }

    private IEnumerator TransitionLight(Light light, LampRenderersGroup objectEmissiveRenderer)
    {
        //float flickeringIntensity;

        float elapsedTime = 0.0f;
        float startIntensity = light.intensity;

        while (elapsedTime < transitionDuration)
        {
            light.intensity = Mathf.Lerp(startIntensity, targetIntensity, elapsedTime / transitionDuration);
            #region Old Test
            //flickeringIntensity = light.intensity;
            //// Adjust emission intensities of all renderers based on flickering intensity
            //foreach (EmisssiveRendererData data in flickeringRenderersData)
            //{
            //    Material[] materialsArray = data.renderer.materials; // Get all materials of the current Renderer

            //    foreach (var lightBulbRendMaterial in materialsArray)
            //    {
            //        int rendererIndex = flickeringRenderersData.IndexOf(data);
            //        //float originalEmissionIntensity = originalRendererIntensities[rendererIndex];
            //        flickeringIntensity = targetIntensity;
            //        float flickerEmissionIntensity = 0f * flickeringIntensity * data.maxIntensity;
            //        lightBulbRendMaterial.SetFloat("_EmissiveExposureWeight", flickerEmissionIntensity);
            //    }
            //    data.renderer.materials = materialsArray;
            //}
            #endregion
            float emissiveIntensity = Mathf.Lerp(2f, 0f, elapsedTime / transitionDuration);
            //objectEmissiveRenderer.material.SetFloat("_EmissiveExposureWeight", emissiveIntensity);
            foreach (var lampCapLODRenderers in objectEmissiveRenderer.lampCapLODRenderers)
            {
                lampCapLODRenderers.material.SetFloat("_EmissiveExposureWeight", emissiveIntensity);
            }

            elapsedTime += Time.deltaTime;
            yield return null;
        }

        // Ensure the intensity is set to the target value
        light.intensity = targetIntensity;
    }

    private IEnumerator FadeOutLights(Light[] lights, LampRenderersGroup[] objectEmissiveRenderer)
    {
        float elapsedTime = 0.0f;
        float[] startIntensities = new float[lights.Length];

        // Record the current intensities
        for (int i = 0; i < lights.Length; i++)
        {
            startIntensities[i] = lights[i].intensity;
        }

        while (elapsedTime < transitionDuration)
        {
            for (int i = 0; i < lights.Length; i++)
            {
                lights[i].intensity = Mathf.Lerp(startIntensities[i], initialIntensity, elapsedTime / transitionDuration);
            }

            float emissiveIntensity = Mathf.Lerp(0f, 3f, elapsedTime / transitionDuration);
            //objectEmissiveRenderer.material.SetFloat("_EmissiveExposureWeight", emissiveIntensity);
            for (int i = 0; i < objectEmissiveRenderer.Length; i++)
            {

           
                foreach (var lampCapLODRenderers in objectEmissiveRenderer[i].lampCapLODRenderers)
                {
                    lampCapLODRenderers.material.SetFloat("_EmissiveExposureWeight", emissiveIntensity);
                }
            }
            elapsedTime += Time.deltaTime;
            yield return null;
        }

        // Ensure the intensities are set to the initial value
        for (int i = 0; i < lights.Length; i++)
        {
            lights[i].intensity = initialIntensity;
        }
    }

    public void ResetLights()
    {
        StopAllCoroutines();
        // Iterate over all lights in the scene
        foreach (Light light in allLights)
        {
            // Reset light intensity to initial value
            light.intensity = startIntensity;
        }

        // Iterate over all lamp renderers groups
        foreach (LampRenderersGroup lampRendererGroup in lampRenderersGroup)
        {
            // Reset emissive exposure weight to initial value for each renderer in the group
            foreach (Renderer renderer in lampRendererGroup.lampCapLODRenderers)
            {
                renderer.material.SetFloat("_EmissiveExposureWeight", initialIntensity);
            }
        }
    }
}