import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'vehicle_model.dart';
import 'vehicle_api.dart';

class VehicleApplyState {
  final VehicleModel vehicle;
  final bool isSubmitting;
  const VehicleApplyState({required this.vehicle, this.isSubmitting = false});
  VehicleApplyState copyWith({VehicleModel? vehicle, bool? isSubmitting}) =>
      VehicleApplyState(vehicle: vehicle ?? this.vehicle, isSubmitting: isSubmitting ?? this.isSubmitting);
}

class VehicleApplyController extends StateNotifier<VehicleApplyState> {
  final VehicleApi _api;
  VehicleApplyController(this._api)
      : super(VehicleApplyState(vehicle: VehicleModel(
          id: '', applicationNo: '', applicantId: '', applicantName: '',
          deptId: '', deptName: '', purpose: '',
          startTime: DateTime.now(), endTime: DateTime.now().add(const Duration(hours: 2)),
          origin: '', destination: '', reason: '',
          createTime: DateTime.now(), updateTime: DateTime.now(),
        )));

  void updatePurpose(String v) => state = state.copyWith(vehicle: state.vehicle.copyWith(purpose: v));
  void updateVehicleType(String v) => state = state.copyWith(vehicle: state.vehicle.copyWith(vehicleType: v));
  void updateStartTime(DateTime t) => state = state.copyWith(vehicle: state.vehicle.copyWith(startTime: t));
  void updateEndTime(DateTime t) => state = state.copyWith(vehicle: state.vehicle.copyWith(endTime: t));
  void updateOrigin(String v) => state = state.copyWith(vehicle: state.vehicle.copyWith(origin: v));
  void updateDestination(String v) => state = state.copyWith(vehicle: state.vehicle.copyWith(destination: v));
  void updatePassengerCount(int v) => state = state.copyWith(vehicle: state.vehicle.copyWith(passengerCount: v));
  void updateDriver(String v) => state = state.copyWith(vehicle: state.vehicle.copyWith(driver: v));
  void updateReason(String v) => state = state.copyWith(vehicle: state.vehicle.copyWith(reason: v));
  Future<bool> submit() async {
    state = state.copyWith(isSubmitting: true);
    try { await _api.submit(state.vehicle.copyWith(status: 'pending')); return true; }
    catch (_) { return false; }
    finally { state = state.copyWith(isSubmitting: false); }
  }
  Future<bool> saveDraft() async {
    state = state.copyWith(isSubmitting: true);
    try { await _api.saveDraft(state.vehicle); return true; }
    catch (_) { return false; }
    finally { state = state.copyWith(isSubmitting: false); }
  }
}

final vehicleApplyProvider = StateNotifierProvider.autoDispose.family<VehicleApplyController, VehicleApplyState, String?>((ref, editId) {
  return VehicleApplyController(ref.read(vehicleApiProvider));
});