using UnityEngine;

public class MeshController : TripsitterAve
{
    public int size = 128;
    public float spacing = 1.0f;
    public float AudioScale = 10.0f;
    public float Power = 1.5f;

    MeshFilter meshFilter;
    Vector3[] vertices;

    void Start() {
        meshFilter = GetComponent<MeshFilter>();
        Generate();
    }

    void Update() {
        var spectrumData = GetSpectrumData();
        Mesh mesh = meshFilter.mesh;
        Vector3[] vertices = mesh.vertices;

        for (int i = 0; i < vertices.Length; i++) {
            int s = i % SpectrumSize;
            var height = Mathf.Pow(spectrumData[s] * AudioScale, Power);
            vertices[i].y = height;
        }

        mesh.vertices = vertices;
        mesh.RecalculateBounds();
    }

    private void Generate() {
        Mesh mesh = new Mesh();
        mesh.name = "Audio Mesh";

        vertices = new Vector3[(size + 1) * (size + 1)];
        for (int i = 0, z = 0; z <= size; z++) {
            for (int x = 0; x <= size; x++, i++) {
                vertices[i] = new Vector3(x, 0.0f, z);
            }
        }
        mesh.vertices = vertices;

        int[] triangles = new int[size * size * 6];
        for (int ti = 0, vi = 0, z = 0; z < size; z++, vi++) {
            for (int x = 0; x < size; x++, ti += 6, vi++) {
                triangles[ti] = vi;
                triangles[ti + 3] = triangles[ti + 2] = vi + 1;
                triangles[ti + 4] = triangles[ti + 1] = vi + size + 1;
                triangles[ti + 5] = vi + size + 2;
            }
        }
        mesh.triangles = triangles;
        meshFilter.mesh = mesh;
    }

    // private void OnDrawGizmos() {
    //     if (vertices == null) return;
    //     Gizmos.color = Color.black;
    //     for (int i = 0; i < vertices.Length; i++) {
    //         Gizmos.DrawSphere(vertices[i], 0.1f);
    //     }
    // }
}