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

public class SaturnTroposphereEffects : MonoBehaviour
{
    [Header("Налаштування")]
    public Material stormMaterial;
    public Material windMaterial;
    public float planetRadius = 58f;

    [Range(0f, 1f)]
    public float troposphereLevel = 1f;
    public float previousLevel = 1f;

    private List<ParticleSystem> _bandClusters = new List<ParticleSystem>();
    private List<ParticleSystem> _windClusters = new List<ParticleSystem>();

    void Awake()
    {
        enabled = false;
    }

    public void InitState()
    {
        foreach (var ps in _bandClusters)
            if (ps != null) Destroy(ps.gameObject);
        _bandClusters.Clear();

        foreach (var ps in _windClusters)
            if (ps != null) Destroy(ps.gameObject);
        _windClusters.Clear();

        troposphereLevel = 1f;
        previousLevel = 1f;

        CreateBands();
        CreateWindStreams();
    }

    void CreateBands()
    {
        float[] latitudes = { -50f, -25f, -8f, 8f, 25f, 50f };
        float[] speeds = { 2f, -1.5f, 2.5f, -2.5f, 1.5f, -2f };
        Color[] colors =
        {
            new Color(0.8f, 0.72f, 0.5f),
            new Color(0.88f, 0.8f, 0.58f),
            new Color(0.85f, 0.76f, 0.52f),
            new Color(0.82f, 0.74f, 0.5f),
            new Color(0.78f, 0.7f, 0.48f),
            new Color(0.75f, 0.67f, 0.45f)
        };

        for (int i = 0; i < latitudes.Length; i++)
        {
            GameObject obj = new GameObject("SaturnBand_" + i);
            obj.transform.parent = null;
            obj.transform.position = transform.position;

            ParticleSystem ps = obj.AddComponent<ParticleSystem>();

            var main = ps.main;
            main.loop = true;
            main.playOnAwake = true;
            main.maxParticles = 15000;
            main.startLifetime = new ParticleSystem.MinMaxCurve(6f, 12f);
            main.startSpeed = new ParticleSystem.MinMaxCurve(0f, 0f);
            main.startSize = new ParticleSystem.MinMaxCurve(0.375f, 3f);
            main.startColor = new ParticleSystem.MinMaxGradient(
                new Color(colors[i].r, colors[i].g, colors[i].b, 0.6f),
                new Color(colors[i].r * 0.85f, colors[i].g * 0.85f, colors[i].b * 0.85f, 0.4f)
            );
            main.simulationSpace = ParticleSystemSimulationSpace.World;
            main.gravityModifier = 0f;

            var emission = ps.emission;
            emission.rateOverTime = 0f;

            var shape = ps.shape;
            shape.enabled = true;
            shape.shapeType = ParticleSystemShapeType.Sphere;
            shape.radius = planetRadius;
            shape.radiusThickness = 0.02f;
            shape.arc = 360f;
            shape.rotation = new Vector3(latitudes[i], 0f, 0f);

            var vel = ps.velocityOverLifetime;
            vel.enabled = true;
            vel.space = ParticleSystemSimulationSpace.World;
            vel.orbitalX = new ParticleSystem.MinMaxCurve(0f);
            vel.orbitalY = new ParticleSystem.MinMaxCurve(speeds[i]);
            vel.orbitalZ = new ParticleSystem.MinMaxCurve(0f);
            vel.x = new ParticleSystem.MinMaxCurve(0f);
            vel.y = new ParticleSystem.MinMaxCurve(0f);
            vel.z = new ParticleSystem.MinMaxCurve(0f);

            var colorOverLifetime = ps.colorOverLifetime;
            colorOverLifetime.enabled = true;
            Gradient gradient = new Gradient();
            gradient.SetKeys(
                new GradientColorKey[] {
                    new GradientColorKey(colors[i], 0f),
                    new GradientColorKey(colors[i] * 0.85f, 0.5f),
                    new GradientColorKey(colors[i] * 0.65f, 1f)
                },
                new GradientAlphaKey[] {
                    new GradientAlphaKey(0f, 0f),
                    new GradientAlphaKey(0.6f, 0.15f),
                    new GradientAlphaKey(0.4f, 0.8f),
                    new GradientAlphaKey(0f, 1f)
                }
            );
            colorOverLifetime.color = new ParticleSystem.MinMaxGradient(gradient);

            var noise = ps.noise;
            noise.enabled = true;
            noise.strength = 0.3f;
            noise.frequency = 0.15f;
            noise.scrollSpeed = 0.08f;

            var renderer = ps.GetComponent<ParticleSystemRenderer>();
            renderer.renderMode = ParticleSystemRenderMode.Billboard;
            renderer.sortingFudge = 4f;
            if (stormMaterial != null)
                renderer.material = stormMaterial;

            ps.Play();
            _bandClusters.Add(ps);
        }
    }

    void CreateWindStreams()
    {
        float[] latitudes = { -15f, 0f, 15f };
        float[] speeds = { 15f, -18f, 15f };

        for (int i = 0; i < latitudes.Length; i++)
        {
            GameObject obj = new GameObject("SaturnWind_" + i);
            obj.transform.parent = null;
            obj.transform.position = transform.position;

            ParticleSystem ps = obj.AddComponent<ParticleSystem>();

            var main = ps.main;
            main.loop = true;
            main.playOnAwake = true;
            main.maxParticles = 20000;
            main.startLifetime = new ParticleSystem.MinMaxCurve(2f, 4f);
            main.startSpeed = new ParticleSystem.MinMaxCurve(0f, 0f);
            main.startSize = new ParticleSystem.MinMaxCurve(1.25f, 3.75f);
            main.startColor = new ParticleSystem.MinMaxGradient(
                new Color(0.95f, 0.9f, 0.75f, 0.6f),
                new Color(0.85f, 0.8f, 0.65f, 0.4f)
            );
            main.simulationSpace = ParticleSystemSimulationSpace.World;
            main.gravityModifier = 0f;

            var emission = ps.emission;
            emission.rateOverTime = 0f;

            var shape = ps.shape;
            shape.enabled = true;
            shape.shapeType = ParticleSystemShapeType.Sphere;
            shape.radius = planetRadius * 1.01f;
            shape.radiusThickness = 0.01f;
            shape.arc = 360f;
            shape.rotation = new Vector3(latitudes[i], 0f, 0f);

            var vel = ps.velocityOverLifetime;
            vel.enabled = true;
            vel.space = ParticleSystemSimulationSpace.World;
            vel.orbitalX = new ParticleSystem.MinMaxCurve(0f);
            vel.orbitalY = new ParticleSystem.MinMaxCurve(speeds[i]);
            vel.orbitalZ = new ParticleSystem.MinMaxCurve(0f);
            vel.x = new ParticleSystem.MinMaxCurve(0f);
            vel.y = new ParticleSystem.MinMaxCurve(0f);
            vel.z = new ParticleSystem.MinMaxCurve(0f);

            var colorOverLifetime = ps.colorOverLifetime;
            colorOverLifetime.enabled = true;
            Gradient gradient = new Gradient();
            gradient.SetKeys(
                new GradientColorKey[] {
                    new GradientColorKey(new Color(0.95f, 0.9f, 0.75f), 0f),
                    new GradientColorKey(new Color(0.85f, 0.8f, 0.65f), 0.5f),
                    new GradientColorKey(new Color(0.75f, 0.7f, 0.55f), 1f)
                },
                new GradientAlphaKey[] {
                    new GradientAlphaKey(0f, 0f),
                    new GradientAlphaKey(0.6f, 0.1f),
                    new GradientAlphaKey(0.4f, 0.8f),
                    new GradientAlphaKey(0f, 1f)
                }
            );
            colorOverLifetime.color = new ParticleSystem.MinMaxGradient(gradient);

            var renderer = ps.GetComponent<ParticleSystemRenderer>();
            renderer.renderMode = ParticleSystemRenderMode.Billboard;
            renderer.sortingFudge = 3f;
            if (windMaterial != null)
                renderer.material = windMaterial;
            else if (stormMaterial != null)
                renderer.material = stormMaterial;

            ps.Play();
            _windClusters.Add(ps);
        }
    }

    void UpdateBands()
    {
        foreach (var ps in _bandClusters)
        {
            if (ps == null) continue;
            var emission = ps.emission;

            if (troposphereLevel <= 0f)
            {
                emission.rateOverTime = 0f;
                continue;
            }

            if (troposphereLevel >= 0.7f)
                emission.rateOverTime = 0f;
            else if (troposphereLevel >= 0.5f)
                emission.rateOverTime = Mathf.Lerp(0f, 400f, Mathf.InverseLerp(0.7f, 0.5f, troposphereLevel));
            else if (troposphereLevel >= 0.3f)
                emission.rateOverTime = Mathf.Lerp(400f, 1200f, Mathf.InverseLerp(0.5f, 0.3f, troposphereLevel));
            else
                emission.rateOverTime = Mathf.Lerp(1200f, 2500f, Mathf.InverseLerp(0.3f, 0f, troposphereLevel));
        }
    }

    void UpdateWindStreams()
    {
        foreach (var ps in _windClusters)
        {
            if (ps == null) continue;
            var emission = ps.emission;

            if (troposphereLevel <= 0f)
            {
                emission.rateOverTime = 0f;
                continue;
            }

            if (troposphereLevel >= 1f)
                emission.rateOverTime = 800f;
            else if (troposphereLevel >= 0.7f)
                emission.rateOverTime = Mathf.Lerp(800f, 1200f, Mathf.InverseLerp(1f, 0.7f, troposphereLevel));
            else if (troposphereLevel >= 0.5f)
                emission.rateOverTime = Mathf.Lerp(1200f, 2000f, Mathf.InverseLerp(0.7f, 0.5f, troposphereLevel));
            else if (troposphereLevel >= 0.3f)
                emission.rateOverTime = Mathf.Lerp(2000f, 3000f, Mathf.InverseLerp(0.5f, 0.3f, troposphereLevel));
            else
                emission.rateOverTime = Mathf.Lerp(3000f, 5000f, Mathf.InverseLerp(0.3f, 0f, troposphereLevel));
        }
    }

    void Update()
    {
        if (!Application.isPlaying) return;

        if (troposphereLevel >= 1f && previousLevel < 1f)
            InitState();

        previousLevel = troposphereLevel;
        UpdateBands();
        UpdateWindStreams();
    }

    public void CleanUp()
    {
        foreach (var ps in _bandClusters)
            if (ps != null) Destroy(ps.gameObject);
        _bandClusters.Clear();

        foreach (var ps in _windClusters)
            if (ps != null) Destroy(ps.gameObject);
        _windClusters.Clear();

        enabled = false;
    }
}