import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:srs_app/app.dart';
import 'support/fake_api.dart';
import 'package:srs_app/core/providers.dart';

Future<FakeApi> boot(WidgetTester t, {double width = 430}) async {
  final api = FakeApi();
  t.view.physicalSize = Size(width * 2, 900 * 2);
  t.view.devicePixelRatio = 2;
  addTearDown(t.view.reset);
  await t.pumpWidget(
    ProviderScope(
      overrides: [
        apiProvider.overrideWithValue(api),
        startDateProvider.overrideWithValue(DateTime(2026, 10, 16)),
      ],
      child: const SrsApp(),
    ),
  );
  await t.pumpAndSettle();
  return api;
}

Future<void> signIn(WidgetTester t, String u, String p) async {
  await t.enterText(find.byType(TextField).at(0), u);
  await t.enterText(find.byType(TextField).at(1), p);
  await t.tap(find.text('Sign in').last);
  await t.pumpAndSettle(const Duration(milliseconds: 400));
}

void main() {
  testWidgets('wrong password shows the error line', (t) async {
    await boot(t);
    expect(find.text('Welcome back'), findsOneWidget);
    expect(
      find.text('Forgot your password? Contact your administrator.'),
      findsOneWidget,
    );
    await signIn(t, 'owner', 'bad-password');
    expect(find.text('Wrong username or password'), findsOneWidget);
  });

  testWidgets('admin sees results, four tabs and can open a shop', (t) async {
    await boot(t);
    await signIn(t, 'owner', 'admin123');
    expect(find.text('₹7,700'), findsOneWidget);
    expect(find.text('Suvarna Keralam · SK-74'), findsOneWidget);
    expect(find.text('Users'), findsOneWidget);
    await t.tap(find.text('Shops').last);
    await t.pumpAndSettle();
    expect(find.text('Add shop'), findsOneWidget);
    expect(find.text('180 tickets · 2 orders'), findsOneWidget);
  });

  testWidgets('normal user has three tabs and no Add shop button', (t) async {
    await boot(t);
    await signIn(t, 'kzk.staff', 'staff123');
    expect(find.text('₹6,300'), findsOneWidget);
    expect(find.text('Users'), findsNothing);
    await t.tap(find.text('Shops').last);
    await t.pumpAndSettle();
    expect(find.text('Add shop'), findsNothing);
  });

  testWidgets('order detail lets a user delete the order after confirming', (
    t,
  ) async {
    await boot(t);
    await signIn(t, 'kzk.staff', 'staff123');
    await t.tap(find.text('Orders').last);
    await t.pumpAndSettle();
    expect(find.text('Orders'), findsWidgets);
    await t.tap(find.textContaining('Photo').first);
    await t.pumpAndSettle();
    await t.scrollUntilVisible(
      find.text('Delete order'),
      400,
      scrollable: find.byType(Scrollable).first,
    );
    await t.tap(find.text('Delete order'));
    await t.pumpAndSettle();
    expect(find.text('Delete this order?'), findsOneWidget);
    await t.tap(find.text('Delete order').last);
    await t.pumpAndSettle(const Duration(milliseconds: 500));
    expect(find.text('Delete this order?'), findsNothing);
  });

  testWidgets('admin: user toggle and delete both ask for confirmation', (
    t,
  ) async {
    await boot(t);
    await signIn(t, 'owner', 'admin123');
    await t.tap(find.text('Users').last);
    await t.pumpAndSettle();
    await t.tap(find.text('skm.staff'));
    await t.pumpAndSettle();
    await t.tap(find.byType(Switch).first);
    await t.pumpAndSettle();
    expect(find.text('Deactivate skm.staff?'), findsOneWidget);
    await t.tap(find.text('Cancel'));
    await t.pumpAndSettle();
    expect(t.widget<Switch>(find.byType(Switch).first).value, isTrue);
    // To the end of the page, clear of the tab bar.
    await t.drag(find.byType(Scrollable).first, const Offset(0, -600));
    await t.pumpAndSettle();
    await t.tap(find.text('Delete user'));
    await t.pumpAndSettle();
    expect(find.text('Delete skm.staff?'), findsOneWidget);
    await t.tap(find.text('Delete user').last);
    await t.pumpAndSettle(const Duration(milliseconds: 500));
    expect(find.text('skm.staff'), findsNothing);
  });

  testWidgets('admin: results messages switch, and no phone means no switch', (
    t,
  ) async {
    await boot(t);
    await signIn(t, 'owner', 'admin123');
    await t.tap(find.text('Users').last);
    await t.pumpAndSettle();
    expect(find.byTooltip('Gets results on WhatsApp'), findsOneWidget);

    await t.tap(find.text('kzk.staff'));
    await t.pumpAndSettle();
    final results = find.byType(Switch).last;
    await t.scrollUntilVisible(
      find.text('WhatsApp results'),
      300,
      scrollable: find.byType(Scrollable).first,
    );
    expect(t.widget<Switch>(results).value, isTrue);
    expect(find.text('+91 90000 11111'), findsWidgets);
    await t.tap(results);
    await t.pumpAndSettle(const Duration(milliseconds: 400));
    expect(find.text('WhatsApp results off'), findsOneWidget);
    expect(t.widget<Switch>(find.byType(Switch).last).value, isFalse);

    await t.tap(find.byTooltip('Back'));
    await t.pumpAndSettle(const Duration(milliseconds: 400));
    expect(find.byTooltip('Gets results on WhatsApp'), findsNothing);
    await t.tap(find.text('skm.staff'));
    await t.pumpAndSettle();
    await t.scrollUntilVisible(
      find.text('Add a phone number first'),
      300,
      scrollable: find.byType(Scrollable).first,
    );
    expect(t.widget<Switch>(find.byType(Switch).last).onChanged, isNull);
  });

  group('loading and refresh', () {
    testWidgets('a new date shows a skeleton until its results arrive', (
      t,
    ) async {
      await boot(t);
      await signIn(t, 'owner', 'admin123');
      await t.tap(find.byTooltip('Previous draw'));
      await t.pump();
      await t.pump(const Duration(milliseconds: 50));
      expect(find.bySemanticsLabel('Loading'), findsOneWidget);
      // The draw buttons stay usable while the draw loads.
      expect(find.byTooltip('Next draw'), findsWidgets);
      await t.pumpAndSettle();
      expect(find.bySemanticsLabel('Loading'), findsNothing);
    });

    testWidgets('pulling down reloads results and keeps them on screen', (
      t,
    ) async {
      final api = await boot(t);
      await signIn(t, 'owner', 'admin123');
      final before = api.resultsCalls;
      await t.fling(find.text('₹7,700'), const Offset(0, 400), 1000);
      await t.pump();
      await t.pump(const Duration(milliseconds: 50));
      expect(find.text('₹7,700'), findsOneWidget);
      expect(find.bySemanticsLabel('Loading'), findsNothing);
      await t.pumpAndSettle();
      expect(api.resultsCalls, before + 1);
      expect(find.text('₹7,700'), findsOneWidget);
    });

    testWidgets('a failed pull keeps the data and says so quickly', (t) async {
      final api = await boot(t);
      await signIn(t, 'owner', 'admin123');
      api.failResults = true;
      await t.fling(find.text('₹7,700'), const Offset(0, 400), 1000);
      await t.pump();
      await t.pump(const Duration(seconds: 1));
      // One frame for the error to reach listeners, one for the toast.
      await t.pump();
      await t.pump(const Duration(milliseconds: 300));
      expect(
        find.text("Couldn't refresh. Check your connection and try again."),
        findsOneWidget,
      );
      expect(find.text('₹7,700'), findsOneWidget);
      api.failResults = false;
      await t.pumpAndSettle(const Duration(seconds: 1));
    });

    testWidgets('a failed first load shows Retry, which shows the skeleton', (
      t,
    ) async {
      final api = await boot(t);
      await signIn(t, 'owner', 'admin123');
      api.failResults = true;
      await t.tap(find.byTooltip('Previous draw'));
      await t.pump();
      await t.pump(const Duration(seconds: 1));
      expect(find.text('Unable to reach the server.'), findsOneWidget);

      api.failResults = false;
      await t.tap(find.text('Retry'));
      await t.pump();
      await t.pump(const Duration(milliseconds: 50));
      expect(find.text('Retry'), findsNothing);
      await t.pumpAndSettle();
      expect(find.text('Unable to reach the server.'), findsNothing);
      expect(find.text('Retry'), findsNothing);
    });

    testWidgets('Refresh button shows on wide windows only, and reloads', (
      t,
    ) async {
      final api = await boot(t, width: 1280);
      await signIn(t, 'owner', 'admin123');
      final before = api.resultsCalls;
      await t.tap(find.byTooltip('Refresh'));
      await t.pump();
      await t.pump(const Duration(milliseconds: 50));
      expect(find.bySemanticsLabel('Refreshing'), findsOneWidget);
      await t.pumpAndSettle();
      expect(api.resultsCalls, before + 1);
      expect(find.bySemanticsLabel('Refreshing'), findsNothing);

      t.view.physicalSize = const Size(430 * 2, 900 * 2);
      await t.pumpAndSettle();
      expect(find.byTooltip('Refresh'), findsNothing);
    });
  });
}