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

public class ObjectAirProperties : MonoBehaviour
{
    [Header("Властивості")]
    public float crossSectionArea = 0.05f;
    public float dragCoefficient = 0.47f;

    void Start()
    {
        AnalyzeObject();
    }

    void AnalyzeObject()
    {
        Renderer renderer = GetComponent<Renderer>();
        if (renderer == null) return;

        Bounds bounds = renderer.bounds;
        Vector3 size = bounds.size;
        float[] dimensions = new float[] { size.x, size.y, size.z };
        System.Array.Sort(dimensions);
        System.Array.Reverse(dimensions);
        float largest = dimensions[0];
        float middle = dimensions[1];
        float smallest = dimensions[2];
        float ratio1 = middle / largest;
        float ratio2 = smallest / largest;

        if (ratio1 > 0.8f && ratio2 > 0.8f)
        {
            DetectSphereOrCube(bounds);
        }
        else if (ratio2 < 0.3f)
        {
            crossSectionArea = largest * middle;
            dragCoefficient = 1.28f;
        }
        else if (ratio1 > 0.7f && ratio2 < 0.7f)
        {
            float radius = Mathf.Max(largest, middle) * 0.5f;
            crossSectionArea = Mathf.PI * radius * radius;
            dragCoefficient = 0.82f;
        }
        else
        {
            crossSectionArea = Mathf.Max(
                size.x * size.y,
                size.x * size.z,
                size.y * size.z
            );
            dragCoefficient = 1.05f;
        }
    }

    void DetectSphereOrCube(Bounds bounds)
    {
        MeshFilter meshFilter = GetComponent<MeshFilter>();
        if (meshFilter != null && meshFilter.sharedMesh != null)
        {
            int vertexCount = meshFilter.sharedMesh.vertexCount;
            if (vertexCount > 100)
            {
                float radius = Mathf.Max(bounds.size.x, bounds.size.y, bounds.size.z) * 0.5f;
                crossSectionArea = Mathf.PI * radius * radius;
                dragCoefficient = 0.47f;
            }
            else
            {
                crossSectionArea = Mathf.Max(
                    bounds.size.x * bounds.size.y,
                    bounds.size.x * bounds.size.z,
                    bounds.size.y * bounds.size.z
                );
                dragCoefficient = 1.05f;
            }
        }
        else
        {
            crossSectionArea = Mathf.Max(
                bounds.size.x * bounds.size.y,
                bounds.size.x * bounds.size.z,
                bounds.size.y * bounds.size.z
            );
            dragCoefficient = 1.05f;
        }
    }
}