using UnityEngine;
using Bekkoloco.QuickTile;

public class RailSpawner : MonoBehaviour
{
    public QuickTilemapEditor level;
    // Assign at least two markers, in route order.
    public Transform[] anchors;
    // At Scale x1: bar diameter = width * 0.20 metres.
    [Range(0.05f, 10f)] public float width = 1f;
    [Range(1, 20)] public int subdivisions = 8;

    [ContextMenu("Spawn rail")]
    public void Spawn()
    {
        if (level == null || level.targetTilemap == null ||
            anchors == null || anchors.Length < 2)
        {
            Debug.LogWarning("Assign a configured level and at least two markers.", this);
            return;
        }
        foreach (var anchor in anchors)
        {
            if (anchor == null)
            {
                Debug.LogWarning("Assign every marker before spawning.", this);
                return;
            }
        }
        for (int i = 1; i < anchors.Length; i++)
        {
            if ((anchors[i].position - anchors[i - 1].position).sqrMagnitude
                < 0.0001f)
            {
                Debug.LogWarning("Separate consecutive markers.", this);
                return;
            }
        }

        var path = QuickTilemapEditor.CreateDefaultPath(
            QuickTilemapEditor.PathType.Track, null);
        path.trackStyle = TrackStyle.Rail;
        path.enableTrackMesh = true;
        path.trackWidth = Mathf.Clamp(width, 0.05f, 10f);
        path.trackSubdivisions = Mathf.Clamp(subdivisions, 1, 20);

        for (int i = 0; i < anchors.Length; i++)
        {
            // Preserves world XYZ; free rail points do not snap to terrain.
            level.InsertPathWorldPoint(path, i, anchors[i].position);
        }

        int pathIndex = level.InsertAuthoredPath(path);
        level.RebuildPathMesh(pathIndex);
    }
}