import 'package:equatable/equatable.dart';

/// A named duty position that can be assigned to a soldier record.
///
/// Built-in positions are seeded at first launch and cannot be deleted.
/// Users may add, rename, or delete custom positions.
class SoldierPosition extends Equatable {
  const SoldierPosition({
    required this.positionId,
    required this.title,
    this.isBuiltIn = false,
  });

  /// Unique identifier (UUID v4 for custom; fixed string for built-ins).
  final String positionId;

  /// Human-readable position title (e.g. "Team Leader", "Rifleman").
  final String title;

  /// True for positions seeded by the app; false for user-created ones.
  final bool isBuiltIn;

  SoldierPosition copyWith({
    String? positionId,
    String? title,
    bool? isBuiltIn,
  }) {
    return SoldierPosition(
      positionId: positionId ?? this.positionId,
      title: title ?? this.title,
      isBuiltIn: isBuiltIn ?? this.isBuiltIn,
    );
  }

  @override
  List<Object?> get props => [positionId, title, isBuiltIn];

  @override
  String toString() => 'SoldierPosition($positionId, "$title", builtIn: $isBuiltIn)';

  // ---------------------------------------------------------------------------
  // Built-in positions
  // ---------------------------------------------------------------------------

  /// The full list of built-in Army duty positions seeded on first launch.
  static const List<SoldierPosition> builtIns = [
    // ── Command / Staff ──────────────────────────────────────────────────────
    SoldierPosition(positionId: 'bi_commander', title: 'Commander', isBuiltIn: true),
    SoldierPosition(
      positionId: 'bi_executive_officer',
      title: 'Executive Officer',
      isBuiltIn: true,
    ),
    SoldierPosition(
      positionId: 'bi_command_sergeant_major',
      title: 'Command Sergeant Major',
      isBuiltIn: true,
    ),
    SoldierPosition(positionId: 'bi_first_sergeant', title: 'First Sergeant', isBuiltIn: true),
    SoldierPosition(
      positionId: 'bi_operations_officer',
      title: 'S3 / Operations Officer',
      isBuiltIn: true,
    ),
    SoldierPosition(
      positionId: 'bi_intelligence_officer',
      title: 'S2 / Intelligence Officer',
      isBuiltIn: true,
    ),
    SoldierPosition(
      positionId: 'bi_logistics_officer',
      title: 'S4 / Logistics Officer',
      isBuiltIn: true,
    ),
    SoldierPosition(positionId: 'bi_signal_officer', title: 'S6 / Signal Officer', isBuiltIn: true),
    // ── Platoon ───────────────────────────────────────────────────────────────
    SoldierPosition(positionId: 'bi_platoon_leader', title: 'Platoon Leader', isBuiltIn: true),
    SoldierPosition(positionId: 'bi_platoon_sergeant', title: 'Platoon Sergeant', isBuiltIn: true),
    SoldierPosition(positionId: 'bi_rto', title: 'RTO / Radio Operator', isBuiltIn: true),
    // ── Squad / Section ───────────────────────────────────────────────────────
    SoldierPosition(positionId: 'bi_squad_leader', title: 'Squad Leader', isBuiltIn: true),
    SoldierPosition(positionId: 'bi_team_leader', title: 'Team Leader', isBuiltIn: true),
    // ── Individual ────────────────────────────────────────────────────────────
    SoldierPosition(positionId: 'bi_rifleman', title: 'Rifleman', isBuiltIn: true),
    SoldierPosition(positionId: 'bi_grenadier', title: 'Grenadier', isBuiltIn: true),
    SoldierPosition(
      positionId: 'bi_automatic_rifleman',
      title: 'Automatic Rifleman',
      isBuiltIn: true,
    ),
    SoldierPosition(positionId: 'bi_machine_gunner', title: 'Machine Gunner', isBuiltIn: true),
    SoldierPosition(positionId: 'bi_sniper', title: 'Sniper', isBuiltIn: true),
    SoldierPosition(positionId: 'bi_jtac', title: 'JTAC / Fire Support', isBuiltIn: true),
    SoldierPosition(positionId: 'bi_medic', title: 'Medic', isBuiltIn: true),
    SoldierPosition(positionId: 'bi_combat_engineer', title: 'Combat Engineer', isBuiltIn: true),
    SoldierPosition(positionId: 'bi_driver', title: 'Driver', isBuiltIn: true),
    SoldierPosition(positionId: 'bi_gunner', title: 'Gunner', isBuiltIn: true),
    SoldierPosition(positionId: 'bi_loader', title: 'Loader', isBuiltIn: true),
    SoldierPosition(positionId: 'bi_tank_commander', title: 'Tank Commander', isBuiltIn: true),
    SoldierPosition(positionId: 'bi_crew_member', title: 'Crew Member', isBuiltIn: true),
    SoldierPosition(positionId: 'bi_supply_sergeant', title: 'Supply Sergeant', isBuiltIn: true),
    SoldierPosition(positionId: 'bi_armorer', title: 'Armorer', isBuiltIn: true),
    SoldierPosition(positionId: 'bi_commo_sergeant', title: 'Commo Sergeant', isBuiltIn: true),
    SoldierPosition(positionId: 'bi_intel_analyst', title: 'Intelligence Analyst', isBuiltIn: true),
    SoldierPosition(positionId: 'bi_forward_observer', title: 'Forward Observer', isBuiltIn: true),
    SoldierPosition(positionId: 'bi_chemical_officer', title: 'CBRN Specialist', isBuiltIn: true),
  ];
}