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

public class World : MonoBehaviour {

    public Material mat;
    public static Material mats;
    public static Transform me;

    public const int viewRange = 4; //how many chunks i have to move for new once to spawn / view distance like in mincraft;
    public const int viewRangeHalf = viewRange / 2;

    void Awake ()
    {
        Block.blocks.Add(new Block("dirt", "Dirt", 2, 15));
        Block.blocks.Add(new Block("stone", "Stone", 1, 15));
        Block.blocks.Add(new Block("blockgrass", "Grass", 0, 15, 3, 15, 2, 15));
        Block.blocks.Add(new Block("bedrock", "Bedrock", 1, 14));

        me = transform;
        mats = mat;
    }

    void Update ()
    {
        Vector3 cameraPos = Camera.main.transform.position;

        for(int x = (int)cameraPos.x - (Chunk.width * viewRange); x < (Chunk.width * viewRange) + (int)cameraPos.x; x += viewRange)
        {
            for(int z = (int)cameraPos.z - (Chunk.width * viewRange); z < (Chunk.width * viewRange)+ (int)cameraPos.z; z += viewRange)
            {
                int xx = Mathf.FloorToInt(x / Chunk.width) * Chunk.width;
                int zz = Mathf.FloorToInt(z / Chunk.width) * Chunk.width;

                Vector3 cPos = new Vector3(xx, 0, zz);
                if(Chunk.ChunkExists(cPos))
                {
                    continue;
                }

                Chunk.AddChunk(cPos);
            }
        }

        TickUpdate();
    }

    void TickUpdate ()
    {
        if(Chunk.Working) return;

        Vector3 cameraPos = Camera.main.transform.position;

        Dictionary<Vector3, Chunk> chunkList = Chunk.chunks;

        foreach(var c in chunkList)
        {
            Chunk chunk = c.Value;
            Vector3 pos = c.Key;

            if(Vector3.Distance(cameraPos, pos) > (Chunk.width * (viewRange / 2)) + (Chunk.width * 3))
            {
                chunk.gameObject.SetActive(false);
            }
            else
            {
                if(chunk.gameObject.activeInHierarchy == false)
                {
                    chunk.gameObject.SetActive(true);
                }
            }

            chunk.chunkPos = pos;

            if(chunk.dirty)
            {
                Chunk.Working = true;

                if(!chunk.calculateMap)
                {
                    chunk.CMap();
                }

                chunk.CMesh();
                chunk.dirty = false;

                return;
            }

            if(chunk.lightDirty)
            {
                Chunk.Working = true;
                chunk.CLight();
                chunk.lightDirty = false;
            }
        }
    }
}