using System;
using UnityEngine;

namespace MazeGen
{
    /// <summary>
    /// One doorway out of a Room. Exits are grid-locked to the 4 cardinal directions
    /// (0 = +X/East, 90 = +Y/North, 180 = -X/West, 270 = -Y/South), so a room can have at
    /// most one exit per side and "the door facing room X" always has a single, exact answer.
    /// Every connection between two rooms is represented by a matched pair of Exits,
    /// one on each room, pointing at each other (directly, or via an elbow hallway room).
    /// </summary>
    [Serializable]
    public class Exit
    {
        public int Id;
        public int OwnerRoomId;
        public float DirectionDegrees;

        public bool IsUsed;
        public int? ConnectedRoomId;
        public int? ConnectedExitId;
        public bool IsBlocked; // Exit is permanently unusable (e.g., no path could be generated)

        public Vector2 Direction => new Vector2(
            Mathf.Cos(DirectionDegrees * Mathf.Deg2Rad),
            Mathf.Sin(DirectionDegrees * Mathf.Deg2Rad));
    }
}