import 'package:uuid/uuid.dart';

/// Forráspont (vibrátor-állomás) — az SPS S-fájlból importált TERV-pozíció.
///
/// Tisztán referencia-réteg: nincs "kijelölve/meglőve" mutálható állapota
/// (a döntés szerint a tényleges ellenőrzés a periodikus pozíciónapló és
/// a terv UTÓLAGOS összevetéséből adódik — lásd VibratorNavController).
class SourcePoint {
  final int? id;
  final String uuid;
  final int projectId;

  final String lineId;
  final int station; // VP (vibration point) szám

  final double planEovY;
  final double planEovX;
  final double planLat;
  final double planLon;

  final String source; // 'sps'
  final String? importBatch;

  final DateTime createdAt;

  SourcePoint({
    this.id,
    String? uuid,
    required this.projectId,
    required this.lineId,
    required this.station,
    required this.planEovY,
    required this.planEovX,
    required this.planLat,
    required this.planLon,
    this.source = 'sps',
    this.importBatch,
    DateTime? createdAt,
  })  : uuid = uuid ?? const Uuid().v4(),
        createdAt = createdAt ?? DateTime.now();

  String get displayId => '$lineId · $station';

  Map<String, dynamic> toMap() => {
        if (id != null) 'id': id,
        'uuid': uuid,
        'project_id': projectId,
        'line_id': lineId,
        'station': station,
        'plan_eov_y': planEovY,
        'plan_eov_x': planEovX,
        'plan_lat': planLat,
        'plan_lon': planLon,
        'source': source,
        'import_batch': importBatch,
        'created_at': createdAt.toIso8601String(),
      };

  factory SourcePoint.fromMap(Map<String, dynamic> m) => SourcePoint(
        id: m['id'] as int?,
        uuid: m['uuid'] as String,
        projectId: m['project_id'] as int,
        lineId: (m['line_id'] as String?) ?? '',
        station: m['station'] as int,
        planEovY: (m['plan_eov_y'] as num).toDouble(),
        planEovX: (m['plan_eov_x'] as num).toDouble(),
        planLat: (m['plan_lat'] as num).toDouble(),
        planLon: (m['plan_lon'] as num).toDouble(),
        source: (m['source'] as String?) ?? 'sps',
        importBatch: m['import_batch'] as String?,
        createdAt: DateTime.tryParse((m['created_at'] as String?) ?? '') ??
            DateTime.now(),
      );
}