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

public class Chunks : MonoBehaviour
{
    public int block_width = 200;
    public int block_height = 10000;
    public int block_side = 200;
    public int chunk_size;
    public Vector3 chunk_V3;
    public Renderer renderer;
    public GameObject G_chunk = null;

    public GameObject block = null;
    public BoxCollider collider;

    public LayerMask mask;

    public List<Chunks> chunks = new List<Chunks>();

    void Start()
    {
        chunk_size = block_height * block_width * block_side;
        chunk_V3 = new Vector3(block_width, block_height, block_side);
        chunks.Add(Instantiate(G_chunk, new Vector3(0, 0, 0), Quaternion.identity).GetComponent<Chunks>());

        //generate block 0 for chunk 0
        foreach(Chunks chunk in chunks){
            if(chunk == chunks[0]){
                Instantiate(block, new Vector3(0, 0, 0), Quaternion.identity);
                continue;
            } else{
                renderer = chunk.GetComponent<Renderer>();
                collider = chunk.GetComponent<BoxCollider>();
                collider.size = new Vector3(block_width, block_height, block_side);

                //for x
                if(Physics.CheckSphere(new Vector3(chunk.transform.position.x + 10, chunk.transform.position.y, chunk.transform.position.z), chunk.transform.localScale.x, mask)){
                    return;
                } else{
                    chunks.Add(Instantiate(G_chunk, new Vector3(chunk.transform.position.x + 10, chunk.transform.position.y, chunk.transform.position.z), Quaternion.identity).GetComponent<Chunks>());
                }
                if(Physics.CheckSphere(new Vector3(chunk.transform.position.x - 10, chunk.transform.position.y, chunk.transform.position.z), chunk.transform.localScale.x, mask)){
                    return;
                } else{
                    chunks.Add(Instantiate(G_chunk, new Vector3(chunk.transform.position.x - 10, chunk.transform.position.y, chunk.transform.position.z), Quaternion.identity).GetComponent<Chunks>());
                }
                //we dont do it for y as a chunk extends to more blocks then needed

                //for z
                if(Physics.CheckSphere(new Vector3(chunk.transform.position.x, chunk.transform.position.y, chunk.transform.position.z + 10), chunk.transform.localScale.z, mask)){
                    return;
                } else{
                    chunks.Add(Instantiate(G_chunk, new Vector3(chunk.transform.position.x, chunk.transform.position.y, chunk.transform.position.z + 10), Quaternion.identity).GetComponent<Chunks>());
                }
                if(Physics.CheckSphere(new Vector3(chunk.transform.position.x, chunk.transform.position.y, chunk.transform.position.z - 10), chunk.transform.localScale.z, mask)){
                    return;
                } else{
                    chunks.Add(Instantiate(G_chunk, new Vector3(chunk.transform.position.x, chunk.transform.position.y, chunk.transform.position.z - 10), Quaternion.identity).GetComponent<Chunks>());
                }


            }
        }
    }


    void OnDrawGizmos(){
        Gizmos.color = Color.gray;
        Gizmos.DrawWireCube(renderer.bounds.center ,chunk_V3);
    }
}