import 'parser.dart';
import 'sentence.dart';
import 'types.dart';

// ignore_for_file: constant_identifier_names

const TypeRMC = "RMC";
// ValidRMC character
const ValidRMC = "A";
// InvalidRMC character
const InvalidRMC = "V";

class RMC {
  BaseSentence sentence; // sentence
  Time time; // Time Stamp
  String validity; // validity - A-ok, V-invalid
  double latitude; // Latitude
  double longitude; // Longitude
  double speed; // Speed in knots
  double course; // True course
  Date date; // Date
  double variation; // Magnetic variation
  String? ffaMode; // FAA mode indicator (filled in NMEA 2.3 and later)
  String? navStatus; // Nav Status (NMEA 4.1 and later)

  RMC({
    required this.sentence,
    required this.time,
    required this.validity,
    required this.latitude,
    required this.longitude,
    required this.speed,
    required this.course,
    required this.date,
    required this.variation,
    this.ffaMode,
    this.navStatus,
  }) ;

  static RMC newRMC(BaseSentence s) {
    var p = Parser(s);
    var m = RMC(
      sentence: s,
      time: p.time(0, "time"),
      validity: p.enumString(1, "validity", [ValidRMC, InvalidRMC]),
      latitude: p.latLong(2, 3, "latitude"),
      longitude: p.latLong(4, 5, "longitude"),
      speed: p.float64(6, "speed"),
      course: p.float64(7, "course"),
      date: p.date(8, "date"),
      variation: p.float64(9, "variation"),//是否有效
    );
    if (p.enumString(10, "direction", [West, East]) == West) {
      m.variation = 0 - m.variation;
    }
    if (s.fields.length > 11) {
      m.ffaMode = p.string(11,
          "FAA mode"); // not enum because some devices have proprietary "non-nmea" values
    }
    if (s.fields.length > 12) {
      m.navStatus = p.enumString(12, "navigation status", [
        NavStatusSafe,
        NavStatusCaution,
        NavStatusUnsafe,
        NavStatusNotValid,
      ]);
    }
    return m;
  }
}