import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:get/get.dart';

import 'package:ertl_filament_verwaltung/controller/home_controller.dart';
import 'package:ertl_filament_verwaltung/helper/bauteil_preis_berechnung.dart';
import 'package:ertl_filament_verwaltung/helper/storage_keys.dart';
import 'package:ertl_filament_verwaltung/models/bauteil_model.dart';
import 'package:ertl_filament_verwaltung/models/backup_model.dart';
import 'package:ertl_filament_verwaltung/models/kauf_filament_model.dart';
import 'package:ertl_filament_verwaltung/pages/home_view.dart';
import 'package:ertl_filament_verwaltung/services/get_storage_services.dart';
import 'package:ertl_filament_verwaltung/theme/app_theme.dart';

import 'helpers/memory_storage_service.dart';

void main() {
  late MemoryStorageService storage;
  late HomeController controller;
  setUp(() {
    Get.testMode = true;
    storage = MemoryStorageService();
    Get.put<GetStorageService>(storage);
    controller = Get.put(HomeController());
  });
  tearDown(() => Get.reset());

  Future<void> show(WidgetTester tester) async {
    tester.view.physicalSize = const Size(320, 900);
    tester.view.devicePixelRatio = 1;
    addTearDown(tester.view.resetPhysicalSize);
    addTearDown(tester.view.resetDevicePixelRatio);
    await tester.pumpWidget(
      GetMaterialApp(theme: AppTheme.light, home: const HomeView()),
    );
    await tester.pumpAndSettle();
  }

  void fill() {
    controller.haendlerController.text = 'Shop';
    controller.markeController.text = 'Marke';
    controller.farbeController.text = 'Blau';
    controller.preisController.text = '20';
    controller.gewichtController.text = '1000';
  }

  Future<void> edit(WidgetTester tester, KaufFilamentModel filament) async {
    final pending = controller.editFilament(filament);
    await tester.pumpAndSettle();
    await pending;
  }

  testWidgets(
    'Gross weight saves, reloads, edits, duplicates and can be cleared independently',
    (tester) async {
      await show(tester);
      fill();
      final field = find.byWidgetPredicate(
        (widget) =>
            widget is TextFormField &&
            widget.controller == controller.bruttoGewichtController,
      );
      await tester.ensureVisible(field);
      await tester.enterText(field, '1250,5');
      await controller.saveFilament();
      await tester.pumpAndSettle();
      var saved = controller.filamente.single;
      expect(saved.gewichtGramm, 1000);
      expect(saved.bruttoGewichtGramm, 1250.5);
      expect(controller.bruttoGewichtController.text, isEmpty);
      controller.loadFilamente();
      expect(controller.filamente.single.bruttoGewichtGramm, 1250.5);
      await edit(tester, saved);
      expect(controller.bruttoGewichtController.text, '1250,5');
      controller.bruttoGewichtController.text = '1300';
      await controller.saveFilament();
      await tester.pumpAndSettle();
      saved = controller.filamente.single;
      await controller.duplicateFilament(saved);
      expect(controller.filamente, hasLength(2));
      expect(
        controller.filamente.map((item) => item.filamentId).toSet(),
        hasLength(2),
      );
      expect(
        controller.filamente.every((item) => item.bruttoGewichtGramm == 1300),
        isTrue,
      );
      await edit(tester, saved);
      controller.bruttoGewichtController.clear();
      await controller.saveFilament();
      await tester.pumpAndSettle();
      final changed = controller.filamente.firstWhere(
        (item) => item.filamentId == saved.filamentId,
      );
      expect(changed.bruttoGewichtGramm, isNull);
      expect(changed.gewichtGramm, 1000);
      expect(
        controller.filamente
            .firstWhere((item) => item.filamentId != saved.filamentId)
            .bruttoGewichtGramm,
        1300,
      );
      expect(tester.takeException(), isNull);
    },
  );

  testWidgets(
    'Gross weight must be finite, positive and at least net weight; leaving it empty is allowed',
    (tester) async {
      await show(tester);
      fill();
      for (final invalid in ['999', '0', '-1', 'NaN', 'Infinity', 'abc']) {
        controller.bruttoGewichtController.text = invalid;
        await controller.saveFilament();
        await tester.pumpAndSettle();
        expect(controller.filamente, isEmpty);
        expect(storage.getModelList(StorageKeys.filamente), isEmpty);
      }
      controller.bruttoGewichtController.clear();
      await controller.saveFilament();
      await tester.pumpAndSettle();
      expect(controller.filamente.single.bruttoGewichtGramm, isNull);
      expect(tester.takeException(), isNull);
    },
  );

  test('Gross weight is backed up while old backups without gross weight still load', () {
    final rolle = KaufFilamentModel(
      filamentId: 'a',
      kaufdatum: DateTime(2026),
      haendler: 'Shop',
      marke: 'Marke',
      material: 'PLA',
      preis: 20,
      farbe: 'Blau',
      gewicht: '1kg',
      bruttoGewichtGramm: 1250,
    );
    final data = {
      for (final key in BackupModel.keys) key: <Map<String, dynamic>>[],
    };
    data[StorageKeys.filamente] = [rolle.toJson()];
    final restored = BackupModel.decode(BackupModel(data).encode());
    final model = KaufFilamentModel.fromJson(
      restored.data[StorageKeys.filamente]!.single,
    );
    expect(model.bruttoGewichtGramm, 1250);
    expect(model.gewichtGramm, 1000);
    data[StorageKeys.filamente]!.single.remove('bruttoGewichtGramm');
    expect(
      KaufFilamentModel.fromJson(
        BackupModel.decode(BackupModel(data).encode())
            .data[StorageKeys.filamente]!
            .single,
      ).bruttoGewichtGramm,
      isNull,
    );
    for (final invalid in [999, 0, -1, 'invalid']) {
      data[StorageKeys.filamente]!.single['bruttoGewichtGramm'] = invalid;
      expect(
        () => BackupModel.decode(BackupModel(data).encode()),
        throwsFormatException,
      );
    }
  });

  test(
    'Stock and all price calculations use only original net material weight',
    () {
      final rolle = KaufFilamentModel(
        filamentId: 'a',
        kaufdatum: DateTime(2026),
        haendler: 'Shop',
        marke: 'Marke',
        material: 'PLA',
        preis: 20,
        farbe: 'Blau',
        gewicht: '1000',
        bruttoGewichtGramm: 1500,
      );
      controller.verbrauch['a'] = 200;
      expect(controller.restgewicht(rolle), 800);
      expect(
        controller.restgewicht(rolle.copyWith(bruttoGewichtGramm: 2000)),
        800,
      );
      final part = BauteilModel(
        bauteilId: 'part',
        erstelltAm: DateTime(2026),
        name: 'Teil',
        verwendung: 'Test',
        druckdauerMinuten: 1,
        gewichtGramm: 100,
        abfallGramm: 10,
        filamente: [
          const BauteilFilamentModel(filamentId: 'a', verbrauchGramm: 110),
        ],
      );
      final price = BauteilPreisBerechnung.berechne(part, [rolle], 50)!;
      expect(price.materialKosten, 2);
      expect(price.abfallKosten, .2);
      expect(price.gesamtpreis, 3.3);
    },
  );
}