---

using UnityEngine;
using TMPro;

public class CubeController : MonoBehaviour
{
    [SerializeField] float jumpForce = 8f;
    [SerializeField] float rotationSpeed = 100f;
    [SerializeField] float raycastDistance = 0.8f;
    [SerializeField] LayerMask groundLayer;
    [SerializeField] int step = 5;
    [SerializeField] int maxCubes = 300;
    [SerializeField] float wallMargin = 0f;   // отступ стенок от края камеры

    Rigidbody2D rb;
    SpriteRenderer sr;
    TextMeshPro txt;
    int number;
    int birthFrame;

    static int cubeCount;
    static bool wallsCreated;

    [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
    static void ResetStatics()
    {
        cubeCount = 0;
        wallsCreated = false;
    }

    void Awake()
    {
        rb = GetComponent<Rigidbody2D>();
        sr = GetComponentInChildren<SpriteRenderer>();
        txt = GetComponentInChildren<TextMeshPro>();

        if (rb == null || sr == null || txt == null)
        {
            Debug.LogError("На корневом Cube нужен Rigidbody2D, а внутри Visual (SpriteRenderer) и текст", this);
            enabled = false;
            return;
        }

        birthFrame = Time.frameCount;
        cubeCount++;

        if (!wallsCreated)
        {
            CreateWalls();
            wallsCreated = true;
        }

        RandomizeColors();
        UpdateText();
    }

    void OnDestroy() { cubeCount--; }

    void Update()
    {
        // вращается только картинка, физика не меняется
        sr.transform.Rotate(0, 0, rotationSpeed * Time.deltaTime);

        if (Time.frameCount == birthFrame) return;

        if (Input.GetKeyDown(KeyCode.Space) && IsGrounded())
            Jump();
    }

    bool IsGrounded()
    {
        RaycastHit2D hit = Physics2D.Raycast(transform.position, Vector2.down, raycastDistance, groundLayer);
        return hit.collider != null;
    }

    void Jump()
    {
        rb.linearVelocity = new Vector2(rb.linearVelocity.x, 0f);
        rb.AddForce(Vector2.up * jumpForce, ForceMode2D.Impulse);

        number += step;
        RandomizeColors();
        UpdateText();

        SpawnClone();
    }

    void SpawnClone()
    {
        if (cubeCount >= maxCubes) return;

        Camera cam = Camera.main;
        if (cam == null) return;

        Vector3 pos = cam.ViewportToWorldPoint(
            new Vector3(Random.Range(0.1f, 0.9f), Random.Range(0.5f, 0.9f), 10f));
        pos.z = 0f;

        GameObject clone = Instantiate(gameObject, pos, Quaternion.identity);
        clone.GetComponent<CubeController>().Init(number);
    }

    // невидимые стенки по левому и правому краю камеры
    void CreateWalls()
    {
        Camera cam = Camera.main;
        if (cam == null) return;

        float halfH = cam.orthographicSize;
        float halfW = halfH * cam.aspect;
        float left = cam.transform.position.x - halfW + wallMargin;
        float right = cam.transform.position.x + halfW - wallMargin;
        float thickness = 1f;
        float height = halfH * 6f;

        MakeWall("WallLeft", new Vector2(left - thickness / 2f, 0f), new Vector2(thickness, height));
        MakeWall("WallRight", new Vector2(right + thickness / 2f, 0f), new Vector2(thickness, height));
    }

    void MakeWall(string wallName, Vector2 pos, Vector2 size)
    {
        GameObject wall = new GameObject(wallName);
        wall.transform.position = pos;
        wall.AddComponent<BoxCollider2D>().size = size;
    }

    public void Init(int startNumber)
    {
        number = startNumber;
        RandomizeColors();
        UpdateText();
    }

    void RandomizeColors()
    {
        sr.color = Random.ColorHSV(0f, 1f, 0.7f, 1f, 0.8f, 1f);
        txt.color = Random.ColorHSV(0f, 1f, 0.7f, 1f, 0.8f, 1f);
    }

    void UpdateText()
    {
        txt.text = number.ToString();
    }
}