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

public class BlockController : MonoBehaviour
{
    public LayerMask lm;
    public GameObject bhPrefab;

    GameObject bh;

    void Awake ()
    {
        bh = GameObject.Instantiate(bhPrefab, Vector3.zero, Quaternion.identity) as GameObject;
    }

    void Update()
    {
        RaycastHit hit;
        if(Physics.Raycast(transform.position, transform.forward, out hit, 7f, lm))
        {
            if(!bh.activeInHierarchy)
                bh.SetActive(true);

            Vector3 worldBlockP = hit.point - (hit.normal / 2);
            Vector3 worldBlockAddP = hit.point + (hit.normal / 2);

            Vector3 blockPos = new Vector3(Mathf.FloorToInt(worldBlockP.x), Mathf.FloorToInt(worldBlockP.y), Mathf.FloorToInt(worldBlockP.z));
            Vector3 blockAddPos = new Vector3(Mathf.FloorToInt(worldBlockAddP.x), Mathf.FloorToInt(worldBlockAddP.y), Mathf.FloorToInt(worldBlockAddP.z));

            bh.transform.position = blockPos;

            if(Input.GetMouseButtonDown(1))
            {
                Chunk c = Chunk.SetWorldBlock(blockAddPos, 2);

                if(c != null)
                {
                    c.dirty = true;
                }
            }

            if(Input.GetMouseButtonDown(0))
            {
                Chunk c = Chunk.SetWorldBlock(blockPos, 0);

                byte b = Chunk.GetWorldBlock(blockPos);

                if(b > 0)
                {
                    Block selectedBlock = Block.blocks[b -1];

                    if(selectedBlock.name == "bedrock")
                    {
                        return;
                    }
                }

                if(c != null)
                {
                    c.dirty = true;

                    Vector3 localPos = blockPos - c.chunkPos;

                    //OTHER
                    if(localPos.x == 0)
                    {
                        Chunk nC = Chunk.GetChunk(c.chunkPos + new Vector3(-Chunk.width, 0, 0));
                        if(nC != null)
                        {
                            nC.dirty = true;
                        }
                    }

                    if(localPos.x == Chunk.width - 1)
                    {
                        Chunk nC = Chunk.GetChunk(c.chunkPos + new Vector3(Chunk.width, 0, 0));
                        if(nC != null)
                        {
                            nC.dirty = true;
                        }
                    }

                    if(localPos.z == 0)
                    {
                        Chunk nC = Chunk.GetChunk(c.chunkPos + new Vector3(0, 0, -Chunk.width));
                        if(nC != null)
                        {
                            nC.dirty = true;
                        }
                    }

                    if(localPos.z == Chunk.width - 1)
                    {
                        Chunk nC = Chunk.GetChunk(c.chunkPos + new Vector3(0, 0, Chunk.width));
                        if(nC != null)
                        {
                            nC.dirty = true;
                        }
                    }

                    if(localPos.y == 0)
                    {
                        Chunk nC = Chunk.GetChunk(c.chunkPos + new Vector3(0, -Chunk.height, 0));
                        if(nC != null)
                        {
                            nC.dirty = true;
                        }
                    }

                    if(localPos.y == Chunk.height - 1)
                    {
                        Chunk nC = Chunk.GetChunk(c.chunkPos + new Vector3(0, Chunk.height, 0));
                        if(nC != null)
                        {
                            nC.dirty = true;
                        }
                    }
                }
            }
        }
        else
        {
            bh.SetActive(false);
        }
    }
}