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

public class MarsDeath : MonoBehaviour
{
    [Header("Текстури")]
    public Texture2D mars100;
    public Texture2D mars70;
    public Texture2D mars50;
    public Texture2D mars30;
    public Texture2D mars0;

    [Header("Термосфера")]
    public Texture2D thermo100;
    public Texture2D thermo70;
    public Texture2D thermo50;
    public Texture2D thermo30;
    public Texture2D thermo0;

    [Header("Мертва планета")]
    public Texture2D deadTexture;

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

    private Renderer planetRenderer;
    private Material mat;
    private float prevTropo = -1f;
    private float prevMeso = -1f;
    private float prevThermo = -1f;
    private bool deadApplied = false;
    private Texture2D originalTexture;

    void Start()
    {
        planetRenderer = GetComponent<Renderer>();
        if (planetRenderer == null)
            planetRenderer = GetComponentInChildren<Renderer>();

        if (planetRenderer != null)
        {
            mat = planetRenderer.material;
            originalTexture = (Texture2D)mat.GetTexture("_BaseMap");
        }
    }

    public void ResetTexture()
    {
        troposphereLevel = 1f;
        mesosphereLevel = 1f;
        thermosphereLevel = 1f;

        prevTropo = -1f;
        prevMeso = -1f;
        prevThermo = -1f;

        deadApplied = false;

        if (mat != null && originalTexture != null)
            mat.SetTexture("_BaseMap", originalTexture);
    }

    void Update()
    {
        if (mat == null) return;

        if ((mesosphereLevel <= 0f || thermosphereLevel <= 0f) && !deadApplied)
        {
            deadApplied = true;
            if (deadTexture != null)
                mat.SetTexture("_BaseMap", deadTexture);
            return;
        }

        if (Mathf.Approximately(troposphereLevel, prevTropo) &&
            Mathf.Approximately(mesosphereLevel, prevMeso) &&
            Mathf.Approximately(thermosphereLevel, prevThermo)) return;

        prevTropo = troposphereLevel;
        prevMeso = mesosphereLevel;
        prevThermo = thermosphereLevel;

        UpdateTexture();
    }

    void UpdateTexture()
    {
        if (thermosphereLevel < 1f)
        {
            SetTexture(GetThermoTexture(thermosphereLevel));
            return;
        }

        if (troposphereLevel < 1f)
        {
            SetTexture(GetTropoTexture(troposphereLevel));
            return;
        }
    }

    void SetTexture(Texture2D tex)
    {
        if (tex != null)
            mat.SetTexture("_BaseMap", tex);
    }

    Texture2D GetTropoTexture(float level)
    {
        if (level >= 0.7f) return mars100;
        else if (level >= 0.5f) return mars70;
        else if (level >= 0.3f) return mars50;
        else if (level > 0f) return mars30;
        else return mars0;
    }

    Texture2D GetThermoTexture(float level)
    {
        if (level >= 0.7f) return thermo100;
        else if (level >= 0.5f) return thermo70;
        else if (level >= 0.3f) return thermo50;
        else if (level > 0f) return thermo30;
        else return thermo0;
    }
}