using Unity.Mathematics;
using UnityEngine;

namespace DanieleMarotta.RiversongCodeShowcase
{
    public class TileSpace : ITileSpace
    {
        public float TileSize { get; set; }

        public World World { get; set; }

        public int2 WorldToTile(Vector3 position)
        {
            var tileX = Mathf.FloorToInt(position.x / TileSize);
            var tileY = Mathf.FloorToInt(position.z / TileSize);
            return new int2(tileX, tileY);
        }

        public Vector3 TileToWorld(int2 tile, float tileX = 0.5f, float tileY = 0.5f)
        {
            tileX = Mathf.Clamp01(tileX);
            tileY = Mathf.Clamp01(tileY);
            return new Vector3((tile.x + tileX) * TileSize, World.Heightmap.GetValue(tile), (tile.y + tileY) * TileSize);
        }

        public int GetElevation(float y)
        {
            return Mathf.RoundToInt(y);
        }

        public Vector3 GetRectWorldCenter(in TileRect rect)
        {
            var worldCenter = TileToWorld(rect.Min, 0, 0);
            worldCenter += new Vector3(rect.Width, 0, rect.Height) * (0.5f * TileSize);
            return worldCenter;
        }
    }
}