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

public class ChunkManager : MonoBehaviour
{
    private List<Chunk> activeChunks = new List<Chunk>();
    private Camera viewer;
    [SerializeField] private MeshGeneration _meshGeneration;

    public Material material;
    public int viewableChunks = 3;
    public int chunkSize = 20;
    public float isoLevel = 0.4f;

    public InputAction action;
    // Start is called before the first frame update
    void Start()
    {
        viewer = Camera.main;
        action.Enable();
        action.performed += _ => Generate();
        
        Generate();
    }

    private void Generate()
    {
        foreach (var c in activeChunks)
        {
            Destroy(c);
        }
        activeChunks.Clear();
        
        for (int i = 0; i < viewableChunks; i++)
        {
            for (int j = 0; j < viewableChunks; j++)
            {
                for (int k = 0; k < viewableChunks; k++)
                {
                    CreateChunks(new Vector3(i, j, k) * (chunkSize - 1));
                }
            }
        }
    }


    // Update is called once per frame
    void Update()
    {
        
    }

    void CreateChunks(Vector3 offset)
    {
        var mesh = _meshGeneration.March(chunkSize, offset, isoLevel);
        
        GameObject chunkContainer = new GameObject($"chunk {offset.x} {offset.y} {offset.z}");
        var chunk = chunkContainer.AddComponent<Chunk>();
        chunk.Init(offset, mesh, material);
        
        activeChunks.Add(chunk);
    }
}