Merge branch 'branch' of https://github.com/kleponijo/klimatologi into branch

lib/app_view.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:klimatologiot/blocs/authentication_bloc/authentication_bloc.dart';
-
+import 'package:flutter_localizations/flutter_localizations.dart';
 import 'package:klimatologiot/screens/auth/views/welcome_screen.dart';
 import 'package:klimatologiot/screens/home/views/home_screen.dart';
 
@@ -13,6 +13,15 @@ class MyAppView extends StatelessWidget {
     return MaterialApp(
         title: 'Klimatologi',
         debugShowCheckedModeBanner: false,
+        localizationsDelegates: const [
+          GlobalMaterialLocalizations.delegate,
+          GlobalWidgetsLocalizations.delegate,
+          GlobalCupertinoLocalizations.delegate,
+        ],
+        supportedLocales: const [
+          Locale('id', 'ID'),
+          Locale('en'),
+        ],
         theme: ThemeData(
           colorScheme: ColorScheme.light(
               surface: Colors.grey.shade100,

lib/screens/monitoring/shared/utils/excel/excel_saver_mobile.dart

@@ -0,0 +1,19 @@
+import 'dart:io';
+import 'dart:typed_data';
+import 'package:path_provider/path_provider.dart';
+import 'package:share_plus/share_plus.dart';
+
+/// Mobile (Android/iOS): simpan ke temp dir lalu buka share sheet
+Future<void> saveAndShareExcel(Uint8List bytes, String fileName) async {
+  final dir  = await getTemporaryDirectory();
+  final file = File('${dir.path}/$fileName');
+  await file.writeAsBytes(bytes, flush: true);
+
+  await Share.shareXFiles(
+    [XFile(
+      file.path,
+      mimeType: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+    )],
+    subject: fileName,
+  );
+}

lib/screens/monitoring/shared/utils/excel/excel_saver_stub.dart

@@ -0,0 +1,6 @@
+import 'dart:typed_data';
+
+// Stub — tidak pernah dipanggil langsung, digantikan web atau mobile
+Future<void> saveAndShareExcel(Uint8List bytes, String fileName) async {
+  throw UnsupportedError('Platform tidak didukung');
+}

lib/screens/monitoring/shared/utils/excel/excel_saver_web.dart

@@ -0,0 +1,16 @@
+// ignore: avoid_web_libraries_in_flutter
+import 'dart:html' as html;
+import 'dart:typed_data';
+
+/// Web: langsung trigger download lewat browser
+Future<void> saveAndShareExcel(Uint8List bytes, String fileName) async {
+  final blob = html.Blob(
+    [bytes],
+    'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+  );
+  final url    = html.Url.createObjectUrlFromBlob(blob);
+  final anchor = html.AnchorElement(href: url)
+    ..setAttribute('download', fileName)
+    ..click();
+  html.Url.revokeObjectUrl(url);
+}

lib/screens/monitoring/shared/utils/excel/wind_speed_excel_service.dart

@@ -8,10 +8,12 @@
 //    share_plus: ^10.0.2
 // ===========================================================
 
-import 'dart:io';
+import 'dart:typed_data';
 import 'package:excel/excel.dart';
+import 'package:flutter/foundation.dart' show kIsWeb;
 import 'package:intl/intl.dart';
 import 'package:monitoring_repository/monitoring_repository.dart';
+import 'dart:io';
 import 'package:path_provider/path_provider.dart';
 import 'package:share_plus/share_plus.dart';
 

lib/screens/monitoring/wind_speed/blocs/wind_speed_bloc.dart

@@ -19,38 +19,32 @@ class WindSpeedBloc extends Bloc<WindSpeedEvent, WindSpeedState> {
   final NotificationBloc _notificationBloc;
   StreamSubscription<MyWindSpeed>? _subscription;
 
-  WindSpeedBloc(
+  WindSpeedBloc({
-      {required MonitoringRepository repository,
+    required MonitoringRepository repository,
-      required NotificationBloc notificationBloc})
+    required NotificationBloc notificationBloc,
-      : _repository = repository,
+  })  : _repository = repository,
         _notificationBloc = notificationBloc,
         super(const WindSpeedState()) {
-    /// 🔥 START MONITORING
     on<WatchWindSpeedStarted>(_onStarted, transformer: restartable());
-
-    /// 🔥 REALTIME UPDATE
     on<_WindSpeedRealtimeUpdated>(_onRealtimeUpdated);
-
-    /// 🔥 CHANGE PERIOD
     on<WindSpeedPeriodChanged>(_onPeriodChanged);
+    on<WindSpeedDateFilterChanged>(_onDateFilterChanged); // ← baru
   }
 
-  /// =========================
+  // ════════════════════════════════════════════════════════════
-  /// 🚀 START
+  //  START
-  /// =========================
+  // ════════════════════════════════════════════════════════════
   Future<void> _onStarted(
     WatchWindSpeedStarted event,
     Emitter<WindSpeedState> emit,
   ) async {
     emit(state.copyWith(isLoading: true));
 
-    /// 1. Ambil history SEKALI
     final history = await _repository.getSensorHistory(
       'anemometer/history',
       (json) => MyWindSpeed.fromJson(json),
     );
 
-    // ✅ Ini saja yang benar
     final dailyGraph = TimeSeriesMapper.smooth(
       TimeSeriesMapper.toDaily(
         data: history,
@@ -58,7 +52,6 @@ class WindSpeedBloc extends Bloc<WindSpeedEvent, WindSpeedState> {
         getValue: (e) => e.speed,
       ),
     );
-
     final weekly = TimeSeriesMapper.smooth(
       TimeSeriesMapper.toWeekly(
         data: history,
@@ -66,7 +59,6 @@ class WindSpeedBloc extends Bloc<WindSpeedEvent, WindSpeedState> {
         getValue: (e) => e.speed,
       ),
     );
-
     final monthly = TimeSeriesMapper.smooth(
       TimeSeriesMapper.toMonthly(
         data: history,
@@ -75,25 +67,22 @@ class WindSpeedBloc extends Bloc<WindSpeedEvent, WindSpeedState> {
       ),
     );
 
-    // Cek kondisi awal dari history
     if (history.isNotEmpty) {
       _emitWindAlert(history.last.speed);
     }
 
     emit(state.copyWith(
       history: history,
+      filteredHistory: history, // awal = semua data
       dailySpeeds: dailyGraph,
       weeklySpeeds: weekly,
       monthlySpeeds: monthly,
       isLoading: false,
-      alertLevel: history.isNotEmpty // ← tambah ini
+      alertLevel:
-          ? _getAlertLevel(history.last.speed)
+          history.isNotEmpty ? _getAlertLevel(history.last.speed) : 'Normal',
-          : "Normal",
     ));
 
-    /// 3. Start realtime stream (manual subscription)
     await _subscription?.cancel();
-
     _subscription = _repository
         .getSensorStream(
       'anemometer/realtime',
@@ -104,9 +93,9 @@ class WindSpeedBloc extends Bloc<WindSpeedEvent, WindSpeedState> {
     });
   }
 
-  /// =========================
+  // ════════════════════════════════════════════════════════════
-  /// ⚡ REALTIME UPDATE
+  //  REALTIME UPDATE
-  /// =========================
+  // ════════════════════════════════════════════════════════════
   void _onRealtimeUpdated(
     _WindSpeedRealtimeUpdated event,
     Emitter<WindSpeedState> emit,
@@ -117,13 +106,11 @@ class WindSpeedBloc extends Bloc<WindSpeedEvent, WindSpeedState> {
 
     if (index < updated.length) {
       final lastValue = updated[index];
-
-      /// 🔥 ANTI SPIKE + SMOOTHING
       if (lastValue != 0) {
         if ((newValue - lastValue).abs() > 15) {
-          newValue = lastValue; // buang spike
+          newValue = lastValue;
         } else {
-          newValue = (lastValue + newValue) / 2; // smoothing
+          newValue = (lastValue + newValue) / 2;
         }
       }
       updated[index] = newValue.clamp(0, 100);
@@ -138,26 +125,24 @@ class WindSpeedBloc extends Bloc<WindSpeedEvent, WindSpeedState> {
     ));
   }
 
-  /// =========================
+  // ════════════════════════════════════════════════════════════
-  /// 📊 CHANGE PERIOD
+  //  PERIOD CHANGED
-  /// =========================
+  // ════════════════════════════════════════════════════════════
   Future<void> _onPeriodChanged(
     WindSpeedPeriodChanged event,
     Emitter<WindSpeedState> emit,
   ) async {
     emit(state.copyWith(selectedPeriod: event.period));
-
     final history = state.history;
 
     List<double> raw;
-
+    if (event.period == 'Minggu Ini') {
-    if (event.period == "Minggu Ini") {
       raw = TimeSeriesMapper.toWeekly(
         data: history,
         getTime: (e) => e.timestamp,
         getValue: (e) => e.speed,
       );
-    } else if (event.period == "Bulan Ini") {
+    } else if (event.period == 'Bulan Ini') {
       raw = TimeSeriesMapper.toMonthly(
         data: history,
         getTime: (e) => e.timestamp,
@@ -171,35 +156,60 @@ class WindSpeedBloc extends Bloc<WindSpeedEvent, WindSpeedState> {
       );
     }
 
-    /// 🔥 baru di-smooth
     final updatedGraph = TimeSeriesMapper.smooth(raw);
 
     emit(state.copyWith(
       dailySpeeds:
-          event.period == "Hari Ini" ? updatedGraph : state.dailySpeeds,
+          event.period == 'Hari Ini' ? updatedGraph : state.dailySpeeds,
       weeklySpeeds:
-          event.period == "Minggu Ini" ? updatedGraph : state.weeklySpeeds,
+          event.period == 'Minggu Ini' ? updatedGraph : state.weeklySpeeds,
       monthlySpeeds:
-          event.period == "Bulan Ini" ? updatedGraph : state.monthlySpeeds,
+          event.period == 'Bulan Ini' ? updatedGraph : state.monthlySpeeds,
       isLoading: false,
     ));
   }
 
-  @override
+  // ════════════════════════════════════════════════════════════
-  Future<void> close() async {
+  //  DATE FILTER CHANGED  ← baru
-    await _subscription?.cancel();
+  // ════════════════════════════════════════════════════════════
-    return super.close();
+  void _onDateFilterChanged(
+    WindSpeedDateFilterChanged event,
+    Emitter<WindSpeedState> emit,
+  ) {
+    final date = event.date;
+    final allHistory = state.history;
+
+    if (date == null) {
+      // Reset: tampilkan semua
+      emit(state.copyWith(
+        filteredHistory: allHistory,
+        clearSelectedDate: true,
+      ));
+      return;
     }
 
+    // Filter data yang tanggalnya sama dengan [date]
+    final filtered = allHistory.where((item) {
+      return item.timestamp.year == date.year &&
+          item.timestamp.month == date.month &&
+          item.timestamp.day == date.day;
+    }).toList();
+
+    emit(state.copyWith(
+      filteredHistory: filtered,
+      selectedDate: date,
+    ));
+  }
+
+  // ════════════════════════════════════════════════════════════
+  //  HELPERS
+  // ════════════════════════════════════════════════════════════
   String _getAlertLevel(double speed) {
-    if (speed >= _kWindDanger) return "Bahaya";
+    if (speed >= _kWindDanger) return 'Bahaya';
-    if (speed >= _kWindWarning) return "Waspada";
+    if (speed >= _kWindWarning) return 'Waspada';
-    return "Normal";
+    return 'Normal';
   }
 
-// =========================
-  // HELPER: kirim alert ke NotificationBloc
-  // =========================
   void _emitWindAlert(double speed) {
     final AlertSeverity severity;
     final String message;
@@ -211,7 +221,7 @@ class WindSpeedBloc extends Bloc<WindSpeedEvent, WindSpeedState> {
       severity = AlertSeverity.warning;
       message = 'Kecepatan angin ${speed.toStringAsFixed(1)} m/s — waspada';
     } else {
-      severity = AlertSeverity.info; // normal → bersihkan alert
+      severity = AlertSeverity.info;
       message = '';
     }
 
@@ -225,16 +235,19 @@ class WindSpeedBloc extends Bloc<WindSpeedEvent, WindSpeedState> {
       ),
     ));
   }
+
+  @override
+  Future<void> close() async {
+    await _subscription?.cancel();
+    return super.close();
+  }
 }
 
-/// =========================
+/// Internal event — tidak diekspos ke luar
-/// 🔒 INTERNAL EVENT (PRIVATE)
-/// =========================
 class _WindSpeedRealtimeUpdated extends WindSpeedEvent {
   final MyWindSpeed data;
-
   const _WindSpeedRealtimeUpdated(this.data);
 
   @override
-  List<Object> get props => [data];
+  List<Object?> get props => [data];
 }

lib/screens/monitoring/wind_speed/blocs/wind_speed_event.dart

@@ -1,16 +1,32 @@
 part of 'wind_speed_bloc.dart';
 
-sealed class WindSpeedEvent extends Equatable {
+abstract class WindSpeedEvent extends Equatable {
   const WindSpeedEvent();
+
   @override
-  List<Object> get props => [];
+  List<Object?> get props => [];
 }
 
-// Perintah untuk mulai dengerin data Firebase
+/// Mulai watch stream realtime + ambil history
-class WatchWindSpeedStarted extends WindSpeedEvent {}
+class WatchWindSpeedStarted extends WindSpeedEvent {
+  const WatchWindSpeedStarted();
+}
 
-// Perintah kalau user ganti filter (Hari Ini, Minggu Ini, dll)
+/// Ganti periode grafik: "Hari Ini" | "Minggu Ini" | "Bulan Ini"
 class WindSpeedPeriodChanged extends WindSpeedEvent {
   final String period;
   const WindSpeedPeriodChanged(this.period);
+
+  @override
+  List<Object?> get props => [period];
+}
+
+/// Filter history berdasarkan tanggal.
+/// Kirim [date] = null untuk reset (tampilkan semua)
+class WindSpeedDateFilterChanged extends WindSpeedEvent {
+  final DateTime? date;
+  const WindSpeedDateFilterChanged(this.date);
+
+  @override
+  List<Object?> get props => [date];
 }

lib/screens/monitoring/wind_speed/blocs/wind_speed_state.dart

@@ -1,57 +1,73 @@
 part of 'wind_speed_bloc.dart';
 
 class WindSpeedState extends Equatable {
+  final bool isLoading;
   final double currentSpeed;
+  final String alertLevel;
   final String selectedPeriod;
+
+  // ── Graf ─────────────────────────────────────────────────────
   final List<double> dailySpeeds;
   final List<double> weeklySpeeds;
   final List<double> monthlySpeeds;
-  final bool isLoading;
+
-  final List<MyWindSpeed> history;
+  // ── History ──────────────────────────────────────────────────
-  final String alertLevel; // "Normal" | "Waspada" | "Bahaya"
+  final List<MyWindSpeed> history; // semua data mentah
+  final List<MyWindSpeed> filteredHistory; // setelah difilter tanggal
+  final DateTime? selectedDate; // null = tampilkan semua
 
   const WindSpeedState({
+    this.isLoading = false,
     this.currentSpeed = 0.0,
-    this.selectedPeriod = "Hari Ini",
+    this.alertLevel = 'Normal',
+    this.selectedPeriod = 'Hari Ini',
     this.dailySpeeds = const [],
-    this.isLoading = true,
-    this.history = const [],
-    this.monthlySpeeds = const [],
     this.weeklySpeeds = const [],
-    this.alertLevel = "Normal",
+    this.monthlySpeeds = const [],
+    this.history = const [],
+    this.filteredHistory = const [],
+    this.selectedDate,
   });
 
   WindSpeedState copyWith({
+    bool? isLoading,
     double? currentSpeed,
+    String? alertLevel,
     String? selectedPeriod,
     List<double>? dailySpeeds,
     List<double>? weeklySpeeds,
     List<double>? monthlySpeeds,
-    bool? isLoading,
     List<MyWindSpeed>? history,
-    String? alertLevel,
+    List<MyWindSpeed>? filteredHistory,
+    DateTime? selectedDate,
+    bool clearSelectedDate = false,
   }) {
     return WindSpeedState(
+      isLoading: isLoading ?? this.isLoading,
       currentSpeed: currentSpeed ?? this.currentSpeed,
+      alertLevel: alertLevel ?? this.alertLevel,
       selectedPeriod: selectedPeriod ?? this.selectedPeriod,
       dailySpeeds: dailySpeeds ?? this.dailySpeeds,
       weeklySpeeds: weeklySpeeds ?? this.weeklySpeeds,
       monthlySpeeds: monthlySpeeds ?? this.monthlySpeeds,
-      isLoading: isLoading ?? this.isLoading,
       history: history ?? this.history,
-      alertLevel: alertLevel ?? this.alertLevel,
+      filteredHistory: filteredHistory ?? this.filteredHistory,
+      selectedDate:
+          clearSelectedDate ? null : (selectedDate ?? this.selectedDate),
     );
   }
 
   @override
-  List<Object> get props => [
+  List<Object?> get props => [
+        isLoading,
         currentSpeed,
+        alertLevel,
         selectedPeriod,
         dailySpeeds,
         weeklySpeeds,
         monthlySpeeds,
-        isLoading,
         history,
-        alertLevel,
+        filteredHistory,
+        selectedDate,
       ];
 }

lib/screens/monitoring/wind_speed/views/wind_speed_screen.dart

@@ -1,23 +1,121 @@
+// ===========================================================
+//  wind_speed_screen.dart
+//  Lokasi: lib/screens/monitoring/wind_speed/views/
+// ===========================================================
+
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:intl/intl.dart';
+import 'package:monitoring_repository/monitoring_repository.dart';
 import '../blocs/wind_speed_bloc.dart';
-import './widgets/wind_speed_chart_widget.dart';
+import 'widgets/wind_speed_chart_widget.dart';
 import 'widgets/period_selector.dart';
-
-import '../../shared/utils/pdf/pdf_export_service.dart';
-import '../../shared/widgets/export_pdf_button.dart';
 import '../../device_setup/views/device_setup_screen.dart';
+import '../../shared/utils/excel/wind_speed_excel_service.dart';
 
-class WindSpeedScreen extends StatelessWidget {
+class WindSpeedScreen extends StatefulWidget {
   const WindSpeedScreen({super.key});
 
+  @override
+  State<WindSpeedScreen> createState() => _WindSpeedScreenState();
+}
+
+class _WindSpeedScreenState extends State<WindSpeedScreen> {
+  // ── Date picker ─────────────────────────────────────────────
+  Future<void> _pickDate(BuildContext context, WindSpeedState state) async {
+    DateTime firstDate = DateTime.now().subtract(const Duration(days: 365));
+    DateTime lastDate = DateTime.now();
+
+    if (state.history.isNotEmpty) {
+      final sorted = [...state.history]
+        ..sort((a, b) => a.timestamp.compareTo(b.timestamp));
+      firstDate = DateTime(sorted.first.timestamp.year,
+          sorted.first.timestamp.month, sorted.first.timestamp.day);
+      lastDate = DateTime(sorted.last.timestamp.year,
+          sorted.last.timestamp.month, sorted.last.timestamp.day);
+    }
+
+    final picked = await showDatePicker(
+      context: context,
+      initialDate: state.selectedDate ?? lastDate,
+      firstDate: firstDate,
+      lastDate: lastDate,
+      locale: const Locale('id', 'ID'),
+      builder: (context, child) => Theme(
+        data: Theme.of(context).copyWith(
+          colorScheme: ColorScheme.light(
+            primary: Colors.blue.shade700,
+            onPrimary: Colors.white,
+            surface: Colors.white,
+          ),
+        ),
+        child: child!,
+      ),
+    );
+
+    if (picked != null && context.mounted) {
+      context.read<WindSpeedBloc>().add(WindSpeedDateFilterChanged(picked));
+    }
+  }
+
+  // ── Export Excel ─────────────────────────────────────────────
+  Future<void> _exportExcel(BuildContext context, WindSpeedState state) async {
+    final messenger = ScaffoldMessenger.of(context);
+    try {
+      messenger.showSnackBar(
+        const SnackBar(
+          content: Row(children: [
+            SizedBox(
+                width: 16,
+                height: 16,
+                child: CircularProgressIndicator(
+                    strokeWidth: 2, color: Colors.white)),
+            SizedBox(width: 12),
+            Text('Membuat file Excel...'),
+          ]),
+          duration: Duration(seconds: 30),
+          behavior: SnackBarBehavior.floating,
+        ),
+      );
+
+      await WindSpeedExcelService.export(
+        currentSpeed: state.currentSpeed,
+        alertLevel: state.alertLevel,
+        period: state.selectedPeriod,
+        history: state.history,
+        filterDate: state.selectedDate,
+      );
+
+      messenger.hideCurrentSnackBar();
+      messenger.showSnackBar(SnackBar(
+        content: const Row(children: [
+          Icon(Icons.check_circle, color: Colors.white),
+          SizedBox(width: 8),
+          Text('File Excel berhasil dibuat!'),
+        ]),
+        backgroundColor: Colors.green.shade600,
+        behavior: SnackBarBehavior.floating,
+        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(10)),
+        duration: const Duration(seconds: 3),
+      ));
+    } catch (e) {
+      messenger.hideCurrentSnackBar();
+      messenger.showSnackBar(SnackBar(
+        content: Text('Gagal: $e'),
+        backgroundColor: Colors.red.shade600,
+        behavior: SnackBarBehavior.floating,
+        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(10)),
+      ));
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       backgroundColor: Colors.grey.shade100,
       appBar: AppBar(
         title: const Text(
-          "Kecepatan Angin",
+          'Kecepatan Angin',
           style: TextStyle(fontWeight: FontWeight.bold),
         ),
         centerTitle: true,
@@ -25,79 +123,70 @@ class WindSpeedScreen extends StatelessWidget {
         backgroundColor: Colors.transparent,
         foregroundColor: Colors.black,
         actions: [
+          BlocBuilder<WindSpeedBloc, WindSpeedState>(
+            builder: (context, state) => IconButton(
+              tooltip: 'Export Excel',
+              icon: const Icon(Icons.file_download_outlined),
+              onPressed: state.history.isEmpty
+                  ? null
+                  : () => _exportExcel(context, state),
+            ),
+          ),
           IconButton(
             tooltip: 'Pengaturan Perangkat',
             icon: const Icon(Icons.settings_rounded),
-            onPressed: () {
+            onPressed: () => Navigator.push(
-              Navigator.push(
               context,
-                MaterialPageRoute(
+              MaterialPageRoute(builder: (_) => const DeviceSetupScreen()),
-                  builder: (_) => const DeviceSetupScreen(),
             ),
-              );
-            },
           ),
         ],
       ),
-
-      /// === Body area, lokasi dan tata letak Widgets === ///
       body: BlocBuilder<WindSpeedBloc, WindSpeedState>(
         builder: (context, state) {
           if (state.isLoading) {
             return const Center(child: CircularProgressIndicator());
           }
 
-          // Pilih data sesuai periode
           final List<double> data = switch (state.selectedPeriod) {
-            "Minggu Ini" => state.weeklySpeeds,
+            'Minggu Ini' => state.weeklySpeeds,
-            "Bulan Ini" => state.monthlySpeeds,
+            'Bulan Ini' => state.monthlySpeeds,
             _ => state.dailySpeeds,
           };
 
-          // Konversi history MyWindSpeed → Map (untuk tabel PDF)
-          final historyMaps = state.history
-              .map((e) => {
-                    'timestamp': e.timestamp,
-                    'speed': e.speed,
-                  })
-              .toList();
-
           return SingleChildScrollView(
             padding: const EdgeInsets.all(20.0),
             child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
               children: [
-                /// ==== 1. Tampilan Angka Utama kecepatan angin (Hero Widget look) ==== ///
+                // ── 1. Hero kecepatan ────────────────────────────
-                _buildMainSpeedDisplay(state.currentSpeed),
+                _buildMainSpeedDisplay(state.currentSpeed, state.alertLevel),
-                const SizedBox(height: 30),
+                const SizedBox(height: 24),
 
-                const Text("Tren Kecepatan",
+                // ── 2. Tren grafik ───────────────────────────────
-                    style:
+                const Text(
-                        TextStyle(fontSize: 18, fontWeight: FontWeight.bold)),
+                  'Tren Kecepatan',
-                const SizedBox(height: 15),
+                  style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
+                ),
+                const SizedBox(height: 12),
                 const PeriodSelector(),
-                const SizedBox(height: 15),
+                const SizedBox(height: 12),
-
+                if (data.isEmpty)
+                  _buildEmptyChart()
+                else
                   WindSpeedChartWidget(
                     dailySpeeds: data,
                     period: state.selectedPeriod,
                   ),
+                const SizedBox(height: 20),
 
-                const SizedBox(height: 30),
+                // ── 3. Info status + periode ─────────────────────
-
-                // 3. Info Tambahan (Status/Periode)
                 _buildDetailRow(state.selectedPeriod, state.alertLevel),
-                const SizedBox(height: 24),
+                const SizedBox(height: 28),
 
-                // ← Tombol Export PDF
+                // ── 4. Riwayat data ──────────────────────────────
-                ExportPdfButton(
+                _buildHistorySection(context, state),
-                  onExport: () => PdfExportService.windSpeed(
+                const SizedBox(height: 20),
-                    currentSpeed: state.currentSpeed,
-                    period: state.selectedPeriod,
-                    speeds: data,
-                    timestamp: DateTime.now(),
-                    historyData: historyMaps.isNotEmpty ? historyMaps : null,
-                  ),
-                ),
               ],
             ),
           );
@@ -106,10 +195,19 @@ class WindSpeedScreen extends StatelessWidget {
     );
   }
 
-  Widget _buildMainSpeedDisplay(double speed) {
+  // ════════════════════════════════════════════════════════════
+  //  Hero kecepatan
+  // ════════════════════════════════════════════════════════════
+  Widget _buildMainSpeedDisplay(double speed, String alertLevel) {
+    final (badgeColor, badgeIcon) = switch (alertLevel) {
+      'Bahaya' => (Colors.red.shade400, Icons.warning_rounded),
+      'Waspada' => (Colors.orange.shade400, Icons.info_outline_rounded),
+      _ => (Colors.green.shade400, Icons.check_circle_outline_rounded),
+    };
+
     return Container(
       width: double.infinity,
-      padding: const EdgeInsets.symmetric(vertical: 40),
+      padding: const EdgeInsets.symmetric(vertical: 36),
       decoration: BoxDecoration(
         gradient: LinearGradient(
           colors: [Colors.blue.shade400, Colors.blue.shade800],
@@ -122,38 +220,73 @@ class WindSpeedScreen extends StatelessWidget {
             color: Colors.blue.withValues(alpha: 0.3),
             blurRadius: 20,
             offset: const Offset(0, 10),
-          )
+          ),
         ],
       ),
       child: Column(
         children: [
-          const Icon(Icons.air, color: Colors.white, size: 50),
+          const Icon(Icons.air, color: Colors.white, size: 46),
-          const SizedBox(
+          const SizedBox(height: 8),
-            height: 10,
-          ),
           Text(
-            "${speed.toStringAsFixed(1)}",
+            speed.toStringAsFixed(1),
             style: const TextStyle(
-                fontSize: 80, fontWeight: FontWeight.bold, color: Colors.white),
+              fontSize: 80,
+              fontWeight: FontWeight.bold,
+              color: Colors.white,
+              height: 1,
+            ),
+          ),
+          const Text('m/s',
+              style: TextStyle(fontSize: 20, color: Colors.white70)),
+          const SizedBox(height: 4),
+          Text(
+            '${(speed * 3.6).toStringAsFixed(1)} km/h',
+            style: const TextStyle(fontSize: 14, color: Colors.white54),
+          ),
+          const SizedBox(height: 14),
+          Container(
+            padding: const EdgeInsets.symmetric(horizontal: 18, vertical: 7),
+            decoration: BoxDecoration(
+              color: badgeColor.withValues(alpha: 0.2),
+              borderRadius: BorderRadius.circular(20),
+              border: Border.all(color: badgeColor.withValues(alpha: 0.7)),
+            ),
+            child: Row(
+              mainAxisSize: MainAxisSize.min,
+              children: [
+                Icon(badgeIcon, color: badgeColor, size: 15),
+                const SizedBox(width: 6),
+                Text(
+                  alertLevel,
+                  style: TextStyle(
+                    color: badgeColor,
+                    fontWeight: FontWeight.bold,
+                    fontSize: 14,
+                  ),
+                ),
+              ],
+            ),
           ),
-          const Text("m/s",
-              style: TextStyle(fontSize: 20, color: Colors.white70))
         ],
       ),
     );
   }
 
+  // ════════════════════════════════════════════════════════════
+  //  Info baris: status + periode
+  // ════════════════════════════════════════════════════════════
   Widget _buildDetailRow(String period, String alertLevel) {
     final (icon, color) = switch (alertLevel) {
-      "Bahaya" => (Icons.warning_rounded, Colors.red),
+      'Bahaya' => (Icons.warning_rounded, Colors.red),
-      "Waspada" => (Icons.info_outline, Colors.orange),
+      'Waspada' => (Icons.info_outline, Colors.orange),
       _ => (Icons.check_circle, Colors.green),
     };
+
     return Row(
       mainAxisAlignment: MainAxisAlignment.spaceBetween,
       children: [
-        _miniInfoCard("Status", alertLevel, icon, color),
+        _miniInfoCard('Status', alertLevel, icon, color),
-        _miniInfoCard("Periode", period, Icons.timer, Colors.orange),
+        _miniInfoCard('Periode', period, Icons.timer, Colors.orange),
       ],
     );
   }
@@ -165,19 +298,340 @@ class WindSpeedScreen extends StatelessWidget {
       decoration: BoxDecoration(
         color: Colors.white,
         borderRadius: BorderRadius.circular(20),
+        boxShadow: [
+          BoxShadow(color: Colors.black.withValues(alpha: 0.05), blurRadius: 6),
+        ],
       ),
       child: Row(
         children: [
-          Icon(icon, color: color, size: 30),
+          Icon(icon, color: color, size: 28),
           const SizedBox(width: 10),
-          Column(
+          Expanded(
+            child: Column(
               crossAxisAlignment: CrossAxisAlignment.start,
               children: [
                 Text(label,
-                  style: const TextStyle(color: Colors.grey, fontSize: 12)),
+                    style: const TextStyle(color: Colors.grey, fontSize: 11)),
-              Text(value, style: const TextStyle(fontWeight: FontWeight.bold)),
+                Text(
+                  value,
+                  style: const TextStyle(
+                      fontWeight: FontWeight.bold, fontSize: 13),
+                  overflow: TextOverflow.ellipsis,
+                ),
               ],
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
+  // ════════════════════════════════════════════════════════════
+  //  Placeholder chart kosong — cegah crash saat data belum ada
+  // ════════════════════════════════════════════════════════════
+  Widget _buildEmptyChart() {
+    return Container(
+      height: 160,
+      width: double.infinity,
+      decoration: BoxDecoration(
+        color: Colors.white,
+        borderRadius: BorderRadius.circular(16),
+      ),
+      child: Column(
+        mainAxisAlignment: MainAxisAlignment.center,
+        children: [
+          Icon(Icons.bar_chart_rounded, size: 42, color: Colors.grey.shade300),
+          const SizedBox(height: 8),
+          Text(
+            'Data grafik belum tersedia',
+            style: TextStyle(color: Colors.grey.shade400, fontSize: 13),
+          ),
+        ],
+      ),
+    );
+  }
+
+  // ════════════════════════════════════════════════════════════
+  //  Section riwayat
+  // ════════════════════════════════════════════════════════════
+  Widget _buildHistorySection(BuildContext context, WindSpeedState state) {
+    // Urutkan terbaru di atas
+    final sorted = [...state.filteredHistory]
+      ..sort((a, b) => b.timestamp.compareTo(a.timestamp));
+
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        // Header judul + tombol filter
+        Row(
+          children: [
+            const Text(
+              'Riwayat Data',
+              style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
+            ),
+            const Spacer(),
+            state.selectedDate != null
+                ? _FilterChip(
+                    label: DateFormat('dd MMM yyyy', 'id_ID')
+                        .format(state.selectedDate!),
+                    icon: Icons.close_rounded,
+                    onTap: () => context
+                        .read<WindSpeedBloc>()
+                        .add(const WindSpeedDateFilterChanged(null)),
                   )
+                : _FilterChip(
+                    label: 'Filter Tanggal',
+                    icon: Icons.calendar_month_rounded,
+                    onTap: () => _pickDate(context, state),
+                  ),
+          ],
+        ),
+
+        if (state.selectedDate != null) ...[
+          const SizedBox(height: 4),
+          Text(
+            '${sorted.length} data pada ${DateFormat('dd MMMM yyyy', 'id_ID').format(state.selectedDate!)}',
+            style: TextStyle(fontSize: 12, color: Colors.grey.shade500),
+          ),
+        ] else ...[
+          const SizedBox(height: 4),
+          Text(
+            '${sorted.length} data tersimpan',
+            style: TextStyle(fontSize: 12, color: Colors.grey.shade500),
+          ),
+        ],
+
+        const SizedBox(height: 12),
+
+        // List dengan batas tinggi 420px — di dalamnya bisa di-scroll
+        sorted.isEmpty
+            ? _buildEmptyHistory(state.selectedDate != null)
+            : ConstrainedBox(
+                constraints: const BoxConstraints(maxHeight: 420),
+                child: Container(
+                  decoration: BoxDecoration(
+                    color: Colors.white,
+                    borderRadius: BorderRadius.circular(16),
+                    boxShadow: [
+                      BoxShadow(
+                        color: Colors.black.withValues(alpha: 0.05),
+                        blurRadius: 8,
+                        offset: const Offset(0, 2),
+                      ),
+                    ],
+                  ),
+                  child: ClipRRect(
+                    borderRadius: BorderRadius.circular(16),
+                    child: ListView.separated(
+                      shrinkWrap: false,
+                      padding: EdgeInsets.zero,
+                      itemCount: sorted.length,
+                      separatorBuilder: (_, __) =>
+                          Divider(height: 1, color: Colors.grey.shade100),
+                      itemBuilder: (context, i) =>
+                          _HistoryTile(item: sorted[i], index: i),
+                    ),
+                  ),
+                ),
+              ),
+      ],
+    );
+  }
+
+  Widget _buildEmptyHistory(bool hasFilter) {
+    return Container(
+      width: double.infinity,
+      padding: const EdgeInsets.symmetric(vertical: 36),
+      decoration: BoxDecoration(
+        color: Colors.white,
+        borderRadius: BorderRadius.circular(16),
+      ),
+      child: Column(
+        children: [
+          Icon(
+            hasFilter ? Icons.search_off_rounded : Icons.inbox_rounded,
+            size: 44,
+            color: Colors.grey.shade300,
+          ),
+          const SizedBox(height: 10),
+          Text(
+            hasFilter
+                ? 'Tidak ada data untuk tanggal ini'
+                : 'Belum ada data history',
+            style: TextStyle(color: Colors.grey.shade400, fontSize: 13),
+          ),
+        ],
+      ),
+    );
+  }
+}
+
+// ════════════════════════════════════════════════════════════
+//  Chip filter tanggal
+// ════════════════════════════════════════════════════════════
+class _FilterChip extends StatelessWidget {
+  final String label;
+  final IconData icon;
+  final VoidCallback onTap;
+
+  const _FilterChip(
+      {required this.label, required this.icon, required this.onTap});
+
+  @override
+  Widget build(BuildContext context) {
+    final color = Colors.blue.shade700;
+    return InkWell(
+      onTap: onTap,
+      borderRadius: BorderRadius.circular(20),
+      child: Container(
+        padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 7),
+        decoration: BoxDecoration(
+          color: color.withValues(alpha: 0.08),
+          borderRadius: BorderRadius.circular(20),
+          border: Border.all(color: color.withValues(alpha: 0.35)),
+        ),
+        child: Row(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            Icon(icon, size: 14, color: color),
+            const SizedBox(width: 6),
+            Text(
+              label,
+              style: TextStyle(
+                  fontSize: 12, color: color, fontWeight: FontWeight.w600),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+// ════════════════════════════════════════════════════════════
+//  Satu baris data riwayat
+// ════════════════════════════════════════════════════════════
+class _HistoryTile extends StatelessWidget {
+  final MyWindSpeed item;
+  final int index;
+
+  const _HistoryTile({required this.item, required this.index});
+
+  String get _alertLevel {
+    if (item.speed >= 12.5) return 'Bahaya';
+    if (item.speed >= 8.0) return 'Waspada';
+    return 'Normal';
+  }
+
+  Color get _alertColor {
+    switch (_alertLevel) {
+      case 'Bahaya':
+        return Colors.red.shade600;
+      case 'Waspada':
+        return Colors.orange.shade700;
+      default:
+        return Colors.green.shade600;
+    }
+  }
+
+  IconData get _alertIcon {
+    switch (_alertLevel) {
+      case 'Bahaya':
+        return Icons.warning_rounded;
+      case 'Waspada':
+        return Icons.info_outline_rounded;
+      default:
+        return Icons.check_circle_outline_rounded;
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final kmh = item.speed * 3.6;
+    final bg = index.isEven ? Colors.grey.shade50 : Colors.white;
+
+    return Container(
+      color: bg,
+      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
+      child: Row(
+        children: [
+          // Nomor
+          SizedBox(
+            width: 28,
+            child: Text(
+              '${index + 1}',
+              style: TextStyle(
+                  fontSize: 12,
+                  color: Colors.grey.shade400,
+                  fontWeight: FontWeight.w600),
+            ),
+          ),
+
+          // Tanggal + jam
+          Expanded(
+            flex: 3,
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: [
+                Text(
+                  DateFormat('dd MMM yyyy', 'id_ID').format(item.timestamp),
+                  style: const TextStyle(
+                      fontSize: 12, fontWeight: FontWeight.w600),
+                ),
+                Text(
+                  DateFormat('HH:mm:ss').format(item.timestamp),
+                  style: TextStyle(
+                      fontSize: 11,
+                      color: Colors.grey.shade500,
+                      fontFamily: 'monospace'),
+                ),
+              ],
+            ),
+          ),
+
+          // Kecepatan
+          Expanded(
+            flex: 2,
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.end,
+              children: [
+                Text(
+                  '${item.speed.toStringAsFixed(3)} m/s',
+                  style: const TextStyle(
+                      fontSize: 13, fontWeight: FontWeight.bold),
+                ),
+                Text(
+                  '${kmh.toStringAsFixed(2)} km/h',
+                  style: TextStyle(fontSize: 11, color: Colors.grey.shade400),
+                ),
+              ],
+            ),
+          ),
+
+          const SizedBox(width: 10),
+
+          // Badge status
+          Container(
+            padding: const EdgeInsets.symmetric(horizontal: 9, vertical: 4),
+            decoration: BoxDecoration(
+              color: _alertColor.withValues(alpha: 0.1),
+              borderRadius: BorderRadius.circular(20),
+              border: Border.all(color: _alertColor.withValues(alpha: 0.4)),
+            ),
+            child: Row(
+              mainAxisSize: MainAxisSize.min,
+              children: [
+                Icon(_alertIcon, size: 11, color: _alertColor),
+                const SizedBox(width: 3),
+                Text(
+                  _alertLevel,
+                  style: TextStyle(
+                      fontSize: 10,
+                      color: _alertColor,
+                      fontWeight: FontWeight.w700),
+                ),
+              ],
+            ),
+          ),
         ],
       ),
     );

linux/flutter/generated_plugin_registrant.cc

@@ -6,10 +6,14 @@
 
 #include "generated_plugin_registrant.h"
 
+#include <flutter_localization/flutter_localization_plugin.h>
 #include <printing/printing_plugin.h>
 #include <url_launcher_linux/url_launcher_plugin.h>
 
 void fl_register_plugins(FlPluginRegistry* registry) {
+  g_autoptr(FlPluginRegistrar) flutter_localization_registrar =
+      fl_plugin_registry_get_registrar_for_plugin(registry, "FlutterLocalizationPlugin");
+  flutter_localization_plugin_register_with_registrar(flutter_localization_registrar);
   g_autoptr(FlPluginRegistrar) printing_registrar =
       fl_plugin_registry_get_registrar_for_plugin(registry, "PrintingPlugin");
   printing_plugin_register_with_registrar(printing_registrar);

linux/flutter/generated_plugins.cmake

@@ -3,6 +3,7 @@
 #
 
 list(APPEND FLUTTER_PLUGIN_LIST
+  flutter_localization
   printing
   url_launcher_linux
 )

macos/Flutter/GeneratedPluginRegistrant.swift

@@ -10,9 +10,11 @@ import cloud_firestore
 import firebase_auth
 import firebase_core
 import firebase_database
+import flutter_localization
 import google_sign_in_ios
 import printing
 import share_plus
+import shared_preferences_foundation
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
   AppSettingsPlugin.register(with: registry.registrar(forPlugin: "AppSettingsPlugin"))
@@ -20,7 +22,9 @@ func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
   FLTFirebaseAuthPlugin.register(with: registry.registrar(forPlugin: "FLTFirebaseAuthPlugin"))
   FLTFirebaseCorePlugin.register(with: registry.registrar(forPlugin: "FLTFirebaseCorePlugin"))
   FLTFirebaseDatabasePlugin.register(with: registry.registrar(forPlugin: "FLTFirebaseDatabasePlugin"))
+  FlutterLocalizationPlugin.register(with: registry.registrar(forPlugin: "FlutterLocalizationPlugin"))
   FLTGoogleSignInPlugin.register(with: registry.registrar(forPlugin: "FLTGoogleSignInPlugin"))
   PrintingPlugin.register(with: registry.registrar(forPlugin: "PrintingPlugin"))
   SharePlusMacosPlugin.register(with: registry.registrar(forPlugin: "SharePlusMacosPlugin"))
+  SharedPreferencesPlugin.register(with: registry.registrar(forPlugin: "SharedPreferencesPlugin"))
 }

pubspec.lock

@@ -334,6 +334,19 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.0.2"
+  flutter_localization:
+    dependency: "direct main"
+    description:
+      name: flutter_localization
+      sha256: a670baf52f4c99859c07293092b9fbc6508235fc88232f5cbb772f2687610a32
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.4.0"
+  flutter_localizations:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.0"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -735,6 +748,62 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "7.1.0"
+  shared_preferences:
+    dependency: transitive
+    description:
+      name: shared_preferences
+      sha256: c3025c5534b01739267eb7d76959bbc25a6d10f6988e1c2a3036940133dd10bf
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.5.5"
+  shared_preferences_android:
+    dependency: transitive
+    description:
+      name: shared_preferences_android
+      sha256: e8d4762b1e2e8578fc4d0fd548cebf24afd24f49719c08974df92834565e2c53
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.23"
+  shared_preferences_foundation:
+    dependency: transitive
+    description:
+      name: shared_preferences_foundation
+      sha256: "4e7eaffc2b17ba398759f1151415869a34771ba11ebbccd1b0145472a619a64f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.5.6"
+  shared_preferences_linux:
+    dependency: transitive
+    description:
+      name: shared_preferences_linux
+      sha256: "580abfd40f415611503cae30adf626e6656dfb2f0cee8f465ece7b6defb40f2f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
+  shared_preferences_platform_interface:
+    dependency: transitive
+    description:
+      name: shared_preferences_platform_interface
+      sha256: "649dc798a33931919ea356c4305c2d1f81619ea6e92244070b520187b5140ef9"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.2"
+  shared_preferences_web:
+    dependency: transitive
+    description:
+      name: shared_preferences_web
+      sha256: c49bd060261c9a3f0ff445892695d6212ff603ef3115edbb448509d407600019
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.3"
+  shared_preferences_windows:
+    dependency: transitive
+    description:
+      name: shared_preferences_windows
+      sha256: "94ef0f72b2d71bc3e700e025db3710911bd51a71cefb65cc609dd0d9a982e3c1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
   simple_gesture_detector:
     dependency: transitive
     description:
@@ -820,6 +889,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.4.0"
+  universal_io:
+    dependency: transitive
+    description:
+      name: universal_io
+      sha256: f63cbc48103236abf48e345e07a03ce5757ea86285ed313a6a032596ed9301e2
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.1"
   url_launcher_linux:
     dependency: transitive
     description:

pubspec.yaml

@@ -21,6 +21,7 @@ dependencies:
   flutter:
     sdk: flutter
   flutter_bloc: ^8.1.0
+  flutter_localization: ^0.4.0
   google_fonts: ^8.0.2
   google_sign_in: ^6.3.0
   intl: ^0.20.2

windows/flutter/generated_plugin_registrant.cc

@@ -9,6 +9,7 @@
 #include <cloud_firestore/cloud_firestore_plugin_c_api.h>
 #include <firebase_auth/firebase_auth_plugin_c_api.h>
 #include <firebase_core/firebase_core_plugin_c_api.h>
+#include <flutter_localization/flutter_localization_plugin_c_api.h>
 #include <printing/printing_plugin.h>
 #include <share_plus/share_plus_windows_plugin_c_api.h>
 #include <url_launcher_windows/url_launcher_windows.h>
@@ -20,6 +21,8 @@ void RegisterPlugins(flutter::PluginRegistry* registry) {
       registry->GetRegistrarForPlugin("FirebaseAuthPluginCApi"));
   FirebaseCorePluginCApiRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("FirebaseCorePluginCApi"));
+  FlutterLocalizationPluginCApiRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("FlutterLocalizationPluginCApi"));
   PrintingPluginRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("PrintingPlugin"));
   SharePlusWindowsPluginCApiRegisterWithRegistrar(

windows/flutter/generated_plugins.cmake

@@ -6,6 +6,7 @@ list(APPEND FLUTTER_PLUGIN_LIST
   cloud_firestore
   firebase_auth
   firebase_core
+  flutter_localization
   printing
   share_plus
   url_launcher_windows