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

public class UranusTroposphereEffects : MonoBehaviour
{
    [Header("Налаштування")]
    public Material cloudMaterial;
    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> _cloudClusters = 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 _cloudClusters)
            if (ps != null) Destroy(ps.gameObject);
        _cloudClusters.Clear();

        troposphereLevel = 1f;
        previousLevel = 1f;

        CreateBands();
        CreateClouds();
    }

    void CreateBands()
    {
        float r = planetRadius * transform.lossyScale.x;
        float[] latitudes = { -40f, -15f, 15f, 40f };
        float[] speeds = { 1.5f, -2f, 2f, -1.5f };
        Color[] colors =
        {
            new Color(0.3f, 0.8f, 0.85f),
            new Color(0.4f, 0.9f, 0.95f),
            new Color(0.35f, 0.85f, 0.9f),
            new Color(0.25f, 0.75f, 0.82f)
        };

        for (int i = 0; i < latitudes.Length; i++)
        {
            GameObject obj = new GameObject("UranusBand_" + 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 = 8000;
            main.startLifetime = new ParticleSystem.MinMaxCurve(8f, 15f);
            main.startSpeed = new ParticleSystem.MinMaxCurve(0f, 0f);
            main.startSize = new ParticleSystem.MinMaxCurve(r * 0.015f, r * 0.04f);
            main.startColor = new ParticleSystem.MinMaxGradient(
                new Color(colors[i].r, colors[i].g, colors[i].b, 0.5f),
                new Color(colors[i].r * 0.8f, colors[i].g * 0.8f, colors[i].b * 0.8f, 0.3f)
            );
            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 = r;
            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] * 0.8f, 0.5f),
                    new GradientColorKey(colors[i] * 0.6f, 1f)
                },
                new GradientAlphaKey[] {
                    new GradientAlphaKey(0f, 0f),
                    new GradientAlphaKey(0.5f, 0.15f),
                    new GradientAlphaKey(0.3f, 0.8f),
                    new GradientAlphaKey(0f, 1f)
                }
            );
            colorOverLifetime.color = new ParticleSystem.MinMaxGradient(gradient);

            var noise = ps.noise;
            noise.enabled = true;
            noise.strength = 0.5f;
            noise.frequency = 0.1f;
            noise.scrollSpeed = 0.05f;

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

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

    void CreateClouds()
    {
        float r = planetRadius * transform.lossyScale.x;
        float[] latitudes = { -20f, 0f, 20f };

        for (int i = 0; i < latitudes.Length; i++)
        {
            GameObject obj = new GameObject("UranusCloud_" + 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 = 3000;
            main.startLifetime = new ParticleSystem.MinMaxCurve(5f, 10f);
            main.startSpeed = new ParticleSystem.MinMaxCurve(0f, 0f);
            main.startSize = new ParticleSystem.MinMaxCurve(r * 0.02f, r * 0.06f);
            main.startColor = new ParticleSystem.MinMaxGradient(
                new Color(0.9f, 0.95f, 1f, 0.6f),
                new Color(0.8f, 0.88f, 0.95f, 0.4f)
            );
            main.simulationSpace = ParticleSystemSimulationSpace.World;
            main.gravityModifier = 0f;

            var emission = ps.emission;
            emission.rateOverTime = 30f;

            var shape = ps.shape;
            shape.enabled = true;
            shape.shapeType = ParticleSystemShapeType.Sphere;
            shape.radius = r * 1.02f;
            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(i % 2 == 0 ? 3f : -3f);
            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(0.9f, 0.95f, 1f), 0f),
                    new GradientColorKey(new Color(0.7f, 0.8f, 0.9f), 1f)
                },
                new GradientAlphaKey[] {
                    new GradientAlphaKey(0f, 0f),
                    new GradientAlphaKey(0.6f, 0.2f),
                    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 = 4f;
            if (cloudMaterial != null) renderer.material = cloudMaterial;

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

    void UpdateBands()
    {
        foreach (var ps in _bandClusters)
        {
            if (ps == null) continue;
            var e = ps.emission;
            if (troposphereLevel <= 0f) { e.rateOverTime = 0f; continue; }
            if (troposphereLevel >= 0.7f) e.rateOverTime = 0f;
            else if (troposphereLevel >= 0.5f) e.rateOverTime = Mathf.Lerp(0f, 200f, Mathf.InverseLerp(0.7f, 0.5f, troposphereLevel));
            else if (troposphereLevel >= 0.3f) e.rateOverTime = Mathf.Lerp(200f, 500f, Mathf.InverseLerp(0.5f, 0.3f, troposphereLevel));
            else e.rateOverTime = Mathf.Lerp(500f, 1000f, Mathf.InverseLerp(0.3f, 0f, troposphereLevel));
        }
    }

    void UpdateClouds()
    {
        foreach (var ps in _cloudClusters)
        {
            if (ps == null) continue;
            var e = ps.emission;
            if (troposphereLevel <= 0f) { e.rateOverTime = 0f; continue; }
            float t = Mathf.InverseLerp(1f, 0f, troposphereLevel);
            e.rateOverTime = Mathf.Lerp(30f, 0f, t);
        }
    }

    void Update()
    {
        if (!Application.isPlaying) return;
        if (troposphereLevel >= 1f && previousLevel < 1f) InitState();
        previousLevel = troposphereLevel;
        UpdateBands();
        UpdateClouds();
    }

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

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

        enabled = false;
    }
}