import 'package:flutter/material.dart';
import 'package:intaleq_maps/intaleq_maps.dart';

/// Military Echelon Levels (المستوى القيادي / التشكيل)
enum MilitaryEchelon {
  team,      // طاقم / جماعة (●)
  squad,     // حظيرة (●●)
  platoon,   // فصيل (●●●)
  company,   // سرية ( | )
  battalion, // كتيبة ( || )
  regiment,  // فوج ( ||| )
  brigade,   // لواء ( X )
  division,  // فرقة ( XX )
}

/// Tactical Symbol Types (الرموز العسكرية القياسية)
enum TacticalSymbolType {
  friendlyInfantry, // مشاة صديقة
  friendlyArmor,    // دروع / دبابات صديقة
  friendlyArtillery,// مدفعية ميدان صديقة
  friendlyAirDefense,// دفاع جوي صديق
  friendlyRadar,    // رادار واستطلاع أرضي
  friendlyHq,       // مركز قيادة وسيطرة (HQ)
  checkpoint,       // نقطة غلق وتفتيش أمني
  observationPost,  // نقطة مراقبة واستطلاع أمامي (OP)
  enemyInfantry,    // مشاة معادية
  enemyArmor,       // دروع معادية
  enemyArtillery,   // مدفعية معادية
  minefield,        // حقل ألغام
  hlz,              // مهبط طيران عامودي
}

/// Tactical Unit / Symbol on Map
class TacticalSymbolItem {
  final String id;
  final String name;
  final TacticalSymbolType type;
  final MilitaryEchelon echelon;
  final LatLng position;
  final double azimuthDeg;
  final String callsign;
  final String notes;

  const TacticalSymbolItem({
    required this.id,
    required this.name,
    required this.type,
    this.echelon = MilitaryEchelon.battalion,
    required this.position,
    this.azimuthDeg = 0.0,
    this.callsign = '',
    this.notes = '',
  });

  bool get isEnemy =>
      type == TacticalSymbolType.enemyInfantry ||
      type == TacticalSymbolType.enemyArmor ||
      type == TacticalSymbolType.enemyArtillery;

  Color get color {
    if (isEnemy) return const Color(0xFFEF4444); // Red
    if (type == TacticalSymbolType.minefield) return const Color(0xFFF59E0B); // Amber
    if (type == TacticalSymbolType.hlz) return const Color(0xFF10B981); // Emerald
    if (type == TacticalSymbolType.checkpoint || type == TacticalSymbolType.observationPost) {
      return const Color(0xFF38BDF8); // Cyan
    }
    return const Color(0xFF0071E3); // Friendly Blue
  }

  IconData get icon {
    switch (type) {
      case TacticalSymbolType.friendlyInfantry:
      case TacticalSymbolType.enemyInfantry:
        return Icons.group;
      case TacticalSymbolType.friendlyArmor:
      case TacticalSymbolType.enemyArmor:
        return Icons.shield;
      case TacticalSymbolType.friendlyArtillery:
      case TacticalSymbolType.enemyArtillery:
        return Icons.gps_fixed;
      case TacticalSymbolType.friendlyAirDefense:
        return Icons.radar;
      case TacticalSymbolType.friendlyRadar:
        return Icons.track_changes;
      case TacticalSymbolType.friendlyHq:
        return Icons.flag;
      case TacticalSymbolType.checkpoint:
        return Icons.gavel;
      case TacticalSymbolType.observationPost:
        return Icons.visibility;
      case TacticalSymbolType.minefield:
        return Icons.warning_amber;
      case TacticalSymbolType.hlz:
        return Icons.flight_land;
    }
  }
}

/// Artillery Weapon Profile (أنظمة المدفعية الميدانية والراجمات)
class ArtilleryWeaponSystem {
  final String id;
  final String nameAr;
  final String caliber;
  final double maxRangeMeters;
  final double minRangeMeters;
  final double muzzleVelocityMps; // سرعة الفوهة م/ث
  final double minElevationDeg;
  final double maxElevationDeg;

  const ArtilleryWeaponSystem({
    required this.id,
    required this.nameAr,
    required this.caliber,
    required this.maxRangeMeters,
    required this.minRangeMeters,
    required this.muzzleVelocityMps,
    required this.minElevationDeg,
    required this.maxElevationDeg,
  });

  static const List<ArtilleryWeaponSystem> standardSystems = [
    ArtilleryWeaponSystem(
      id: 'm109_155',
      nameAr: 'هاوتزر ذاتي الحركة M109A2/A3 (155 ملم)',
      caliber: '155mm',
      minRangeMeters: 3000,
      maxRangeMeters: 24000,
      muzzleVelocityMps: 684,
      minElevationDeg: 3,
      maxElevationDeg: 75,
    ),
    ArtilleryWeaponSystem(
      id: 'mortar_120',
      nameAr: 'هاون ثقيل M120 (120 ملم)',
      caliber: '120mm',
      minRangeMeters: 200,
      maxRangeMeters: 7200,
      muzzleVelocityMps: 318,
      minElevationDeg: 45,
      maxElevationDeg: 85,
    ),
    ArtilleryWeaponSystem(
      id: 'grad_122',
      nameAr: 'راجمة صواريخ BM-21 غراد (122 ملم)',
      caliber: '122mm Rocket',
      minRangeMeters: 5000,
      maxRangeMeters: 20400,
      muzzleVelocityMps: 690,
      minElevationDeg: 0,
      maxElevationDeg: 55,
    ),
    ArtilleryWeaponSystem(
      id: 'mortar_81',
      nameAr: 'هاون متوسط L16 (81 ملم)',
      caliber: '81mm',
      minRangeMeters: 100,
      maxRangeMeters: 5650,
      muzzleVelocityMps: 250,
      minElevationDeg: 45,
      maxElevationDeg: 85,
    ),
  ];
}

/// Ballistic Trajectory Point
class BallisticTrajectoryPoint {
  final double distanceMeters;
  final double altitudeMeters;
  final double groundElevationMeters;
  final LatLng coordinate;

  const BallisticTrajectoryPoint({
    required this.distanceMeters,
    required this.altitudeMeters,
    required this.groundElevationMeters,
    required this.coordinate,
  });
}

/// Complete Artillery Firing Solution (حل الرماية وقوس القذيفة)
class ArtilleryFiringSolution {
  final ArtilleryWeaponSystem weapon;
  final LatLng gunPosition;
  final LatLng targetPosition;
  final double distanceMeters;
  final double azimuthDeg;
  final double azimuthMilsNato; // 6400 mils
  final double quadrantElevationDeg; // زاوية الارتفاع
  final double quadrantElevationMilsNato;
  final double timeOfFlightSeconds; // زمن الطيران
  final double apogeeAltitudeMeters; // ذروة القوس
  final bool isCrestClear; // سلامة تجاوز قمم الجبال (Crest Clearance)
  final double minCrestClearanceMeters;
  final List<BallisticTrajectoryPoint> trajectoryProfile;

  const ArtilleryFiringSolution({
    required this.weapon,
    required this.gunPosition,
    required this.targetPosition,
    required this.distanceMeters,
    required this.azimuthDeg,
    required this.azimuthMilsNato,
    required this.quadrantElevationDeg,
    required this.quadrantElevationMilsNato,
    required this.timeOfFlightSeconds,
    required this.apogeeAltitudeMeters,
    required this.isCrestClear,
    required this.minCrestClearanceMeters,
    required this.trajectoryProfile,
  });
}

/// Helicopter Types for HLZ
enum HelicopterType {
  lightUtility,  // طوافة استطلاع خفيفة (Little Bird / Bell 407)
  mediumLift,    // طوافة نقل وتكتيك متوسطة (UH-60 Blackhawk / AH-64 Apache)
  heavyTransport // طوافة نقل ثقيل (CH-47 Chinook / Super Stallion)
}

/// Helicopter Landing Zone Assessment Result (تقييم مهبط الطيران العامودي)
class HlzAssessmentResult {
  final LatLng center;
  final HelicopterType helicopterType;
  final double groundElevationM;
  final double maxSlopePercent; // نسبة انحدار الأرض
  final double avgSlopePercent;
  final double recommendedClearanceRadiusM;
  final bool isSlopeAcceptable;
  final bool isObstacleClear;
  final String suitabilityGrade; // "ممتاز (OPTIMAL)", "مقبول بحذر (MARGINAL)", "غير صالح (NO-GO)"
  final Color gradeColor;
  final double approachAzimuthDeg; // ممر الاقتراب الآمن
  final List<LatLng> padBoundary;
  final List<LatLng> approachFunnel;

  const HlzAssessmentResult({
    required this.center,
    required this.helicopterType,
    required this.groundElevationM,
    required this.maxSlopePercent,
    required this.avgSlopePercent,
    required this.recommendedClearanceRadiusM,
    required this.isSlopeAcceptable,
    required this.isObstacleClear,
    required this.suitabilityGrade,
    required this.gradeColor,
    required this.approachAzimuthDeg,
    required this.padBoundary,
    required this.approachFunnel,
  });
}

/// Minefield Type
enum MinefieldType {
  antiTank,      // حقل ألغام ضد الدروع (AT)
  antiPersonnel, // حقل ألغام ضد الأفراد (AP)
  mixedBarrier,  // حقل موانع مركب ومختلط
}

/// Minefield Zone & Breaching Corridor (حقل الألغام وممرات العبور)
class MinefieldZoneResult {
  final LatLng startPoint;
  final LatLng endPoint;
  final MinefieldType type;
  final double widthMeters;
  final double lengthMeters;
  final double estimatedMinesCount;
  final List<LatLng> boundaryPolygon;
  final List<LatLng> breachLaneCenterline; // ممر الثغرة الآمن
  final List<LatLng> breachLanePolygon;

  const MinefieldZoneResult({
    required this.startPoint,
    required this.endPoint,
    required this.type,
    required this.widthMeters,
    required this.lengthMeters,
    required this.estimatedMinesCount,
    required this.boundaryPolygon,
    required this.breachLaneCenterline,
    required this.breachLanePolygon,
  });
}

/// Tactical Overlays (منظومة الشفافات العسكرية)
class TacticalOverlayLayer {
  final String id;
  final String nameAr;
  final Color color;
  final bool isVisible;
  final List<List<LatLng>> polygons;
  final List<List<LatLng>> lines;

  const TacticalOverlayLayer({
    required this.id,
    required this.nameAr,
    required this.color,
    this.isVisible = true,
    this.polygons = const [],
    this.lines = const [],
  });

  TacticalOverlayLayer copyWith({bool? isVisible}) {
    return TacticalOverlayLayer(
      id: id,
      nameAr: nameAr,
      color: color,
      isVisible: isVisible ?? this.isVisible,
      polygons: polygons,
      lines: lines,
    );
  }
}