class World
{
    public Dictionary<string, Chunk> Chunks { get; set; } = new Dictionary<string, Chunk>();

    public void AddChunk(Chunk chunk)
    {
        this.Chunks.Add(chunk.X + "," + chunk.Y, chunk);
    }

    public Chunk GetChunk(Vector2 pos)
    {
        return this.GetChunk((int)pos.X, (int)pos.Y);
    }

    public Chunk GetChunk(int x, int y)
    {
        return this.Chunks[x + "," + y];
    }

    public bool HasChunk(Vector2 pos)
    {
        return this.HasChunk((int)pos.X, (int)pos.Y);
    }

    public bool HasChunk(int x, int y)
    {
        return this.Chunks.ContainsKey(x + "," + y);
    }

    public Chunk GetChunkAt(Vector2 pos)
    {
        return this.GetChunkAt((int)pos.X, (int)pos.Y);
    }

    public Chunk GetChunkAt(int x, int y)
    {
        var chunkPos = ToChunkPos(new Vector2(x, y));
        return this.Chunks[chunkPos.X + "," + chunkPos.Y];
    }

    public bool HasChunkAt(Vector2 pos)
    {
        return this.HasChunkAt((int)pos.X, (int)pos.Y);
    }

    public bool HasChunkAt(int x, int y)
    {
        var chunkX = Math.Floor(x / (float)(Constants.ChunkSize * Constants.TileSize));
        var chunkY = Math.Floor(y / (float)(Constants.ChunkSize * Constants.TileSize));

        return this.Chunks.ContainsKey(chunkX + "," + chunkY);
    }

    public bool ChunkExists(int x, int y)
    {
        return this.Chunks.ContainsKey(x + "," + y);
    }

    public static Vector2 ToChunkPos(Vector2 pos)
    {
        var chunkX = Math.Floor(pos.X / (Constants.ChunkSize * Constants.TileSize));
        var chunkY = Math.Floor(pos.Y / (Constants.ChunkSize * Constants.TileSize));
        return new Vector2((float)chunkX, (float)chunkY);
    }

    public int GetTileAt(int x, int y)
    {
        var chunk = this.GetChunkAt(x, y);
        return 0;
    }
}