import 'package:flutter/material.dart';

enum LandmarkType {
  minaret,
  tower,
  waterTank,
  fort,
  mountain,
  militaryBase,
  grainSilo,
}

class TacticalLandmark {
  final String id;
  final String name;
  final String region;
  final LandmarkType type;
  final double lat;
  final double lng;
  final int elevationM;
  final String description;

  const TacticalLandmark({
    required this.id,
    required this.name,
    required this.region,
    required this.type,
    required this.lat,
    required this.lng,
    required this.elevationM,
    required this.description,
  });

  IconData get typeIcon {
    switch (type) {
      case LandmarkType.minaret:
        return Icons.mosque;
      case LandmarkType.tower:
        return Icons.cell_tower;
      case LandmarkType.waterTank:
        return Icons.water_drop;
      case LandmarkType.fort:
        return Icons.castle;
      case LandmarkType.mountain:
        return Icons.terrain;
      case LandmarkType.militaryBase:
        return Icons.shield;
      case LandmarkType.grainSilo:
        return Icons.inventory_2;
    }
  }

  String get typeLabelArabic {
    switch (type) {
      case LandmarkType.minaret:
        return 'مئذنة / مسجد';
      case LandmarkType.tower:
        return 'برج اتصالات / إرسال';
      case LandmarkType.waterTank:
        return 'خزان مياه عالي';
      case LandmarkType.fort:
        return 'قلعة / موقع أثري';
      case LandmarkType.mountain:
        return 'قمة جبل / نقطة مثلثة';
      case LandmarkType.militaryBase:
        return 'قاعدة / مطار عسكري';
      case LandmarkType.grainSilo:
        return 'صوامع حبوب / منشأة عالية';
    }
  }

  Map<String, dynamic> toMap() {
    return {
      'id': id,
      'name': name,
      'region': region,
      'type': type.name,
      'lat': lat,
      'lng': lng,
      'elevationM': elevationM,
      'description': description,
    };
  }
}

class ResectionObservation {
  final TacticalLandmark landmark;
  final double observedAzimuthDeg;
  final double trueAzimuthDeg;
  final DateTime timestamp;

  ResectionObservation({
    required this.landmark,
    required this.observedAzimuthDeg,
    required this.trueAzimuthDeg,
    DateTime? timestamp,
  }) : timestamp = timestamp ?? DateTime.now();
}

class ResectionResult {
  final double lat;
  final double lng;
  final double estimatedAccuracyMeters;
  final List<ResectionObservation> observations;
  final Map<String, double> distanceToLandmarksKm;

  const ResectionResult({
    required this.lat,
    required this.lng,
    required this.estimatedAccuracyMeters,
    required this.observations,
    required this.distanceToLandmarksKm,
  });
}