using System.Collections.Generic;
using EscapeRoomEngine.Engine.Runtime.Modules;
using UnityEngine;

namespace EscapeRoomEngine.Engine.Runtime.Requirements
{
    [CreateAssetMenu(menuName = "Requirements/Face Space Center")]
    public class FaceSpaceCenter : PlacementRequirement
    {
        protected override List<Placement> FilterCandidates(List<Placement> candidates, Module module, Space space)
        {
            float width = space.rrPlacement.size.x;
            float length = space.rrPlacement.size.y;

            candidates.RemoveAll(candidate =>
            {
                var bottomLeft = candidate.BottomLeft;
                var center = new Vector2(bottomLeft.x, bottomLeft.z) +
                             new Vector2(candidate.size.x / 2f, candidate.size.y / 2f);
                var xRel = center.x / width;
                var zRel = center.y / length;
                
                return candidate.orientation !=
                       (zRel > xRel
                           ? zRel > 1 - xRel
                               ? Orientation.South
                               : Orientation.East
                           : zRel > 1 - xRel
                               ? Orientation.West
                               : Orientation.North);
            });

            return candidates;
        }
    }
}