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

import 'package:doormile_cx/data/dev_doormile_api.dart';
import 'package:doormile_cx/data/doormile_api.dart';
import 'package:doormile_cx/data/models.dart';
import 'package:doormile_cx/state/app_scope.dart';
import 'package:doormile_cx/state/app_state.dart';
import 'package:doormile_cx/ui/screens/account_screen.dart';
import 'package:doormile_cx/ui/screens/settings/about_screen.dart';
import 'package:doormile_cx/ui/screens/settings/notifications_screen.dart';
import 'package:doormile_cx/ui/screens/settings/payment_screen.dart';
import 'package:doormile_cx/ui/screens/settings/support_screen.dart';
import 'package:doormile_cx/ui/widgets/inputs.dart';

/// ─────────────────────────────────────────────────────────────────────────
/// EVERY ROW ON ACCOUNT OPENS SOMETHING
///
/// Two of these rows had no `onTap` at all and three answered with a toast.
/// All five drew a chevron, which is the affordance for "this opens a page" —
/// so the screen was making a promise in five places and keeping it in one.
///
/// A tap that silently does nothing is the worst version of this, because the
/// customer cannot tell it from a page that is slow: they press it again.
///
/// The check is deliberately shallow and broad. It does not care what is on
/// each page; it cares that the tap goes somewhere, for every row, which is
/// the thing that was wrong and the thing that quietly comes back when a row
/// is added in a hurry.
/// ─────────────────────────────────────────────────────────────────────────
void main() {
  late AppState app;

  setUp(() async {
    DoormileApi.overrideInstance(DevDoormileApi());
    app = AppState()
      // Straight onto the state rather than through the sign-in screens: this
      // is about what Account's rows do, and walking the OTP flow to find out
      // would make every one of these tests fail for reasons in another file.
      ..customer = const Customer(
        id: 'c1',
        name: 'Joe Oommen',
        phone: '+91 98765 43210',
        email: 'joe@example.com',
      );
    await app.refreshOrders();
  });

  tearDown(() => DoormileApi.overrideInstance(null));

  Future<void> pumpAccount(WidgetTester tester) async {
    // A tall surface so the whole list is laid out. The default 800x600 window
    // leaves the About group below the fold, and `tap` on an off-screen widget
    // warns and misses rather than failing — which reads as "the row does not
    // work" and is the same symptom this file exists to catch.
    tester.view.physicalSize = const Size(1230, 9000);
    tester.view.devicePixelRatio = 3.0;
    addTearDown(tester.view.reset);

    await tester.pumpWidget(
      AppScope(
        state: app,
        child: const MaterialApp(home: AccountScreen()),
      ),
    );
    await tester.pumpAndSettle();
  }

  /// Taps a row by its label and lets whatever it opens settle.
  Future<void> tapRow(WidgetTester tester, String label) async {
    final row = find.ancestor(
      of: find.text(label),
      matching: find.byType(DmRow),
    );
    expect(row, findsOneWidget, reason: 'no row labelled "$label"');
    await tester.tap(row);
    await tester.pumpAndSettle();
  }

  group('the rows that led nowhere', () {
    testWidgets('Notifications opens its page', (tester) async {
      await pumpAccount(tester);
      await tapRow(tester, 'Notifications');
      expect(find.byType(NotificationsScreen), findsOneWidget);
    });

    testWidgets('Payment methods opens its page', (tester) async {
      await pumpAccount(tester);
      await tapRow(tester, 'Payment methods');
      expect(find.byType(PaymentScreen), findsOneWidget);
    });

    testWidgets('Help and support opens its page', (tester) async {
      await pumpAccount(tester);
      await tapRow(tester, 'Help and support');
      expect(find.byType(SupportScreen), findsOneWidget);
    });

    testWidgets('both policy rows open About', (tester) async {
      await pumpAccount(tester);

      await tapRow(tester, 'Terms and policies');
      expect(find.byType(AboutScreen), findsOneWidget);
      // Under its own name, not under the other row's.
      expect(find.text('Terms and policies'), findsWidgets);

      // Not `pageBack()`: that looks for a Material or Cupertino back button
      // and this app's bar carries its own `DmBackButton`.
      tester.state<NavigatorState>(find.byType(Navigator).first).pop();
      await tester.pumpAndSettle();

      await tapRow(tester, 'About Doormile');
      expect(find.byType(AboutScreen), findsOneWidget);
    });
  });

  group('no row draws a chevron it cannot honour', () {
    testWidgets('every chevron row is tappable', (tester) async {
      await pumpAccount(tester);

      final rows = tester.widgetList<DmRow>(find.byType(DmRow)).toList();
      expect(rows, isNotEmpty);

      final broken = [
        for (final row in rows)
          if (row.showChevron && row.onTap == null) row.label,
      ];
      expect(
        broken,
        isEmpty,
        reason: 'these rows point at a page and swallow the tap: $broken',
      );
    });
  });

  group('the pages say only what is true', () {
    testWidgets('Notifications does not promise push', (tester) async {
      await pumpAccount(tester);
      await tapRow(tester, 'Notifications');

      // No push SDK is wired in — `AppState.registerPushToken` has nothing to
      // hand over — so the screen states that rather than offering a switch.
      expect(find.textContaining('not switched on yet'), findsOneWidget);
      expect(find.byType(Switch), findsNothing);
    });

    testWidgets('Payment offers nothing to add or save', (tester) async {
      await pumpAccount(tester);
      await tapRow(tester, 'Payment methods');

      expect(find.textContaining('Nothing is charged'), findsOneWidget);
      expect(find.textContaining('Add card'), findsNothing);
    });

    testWidgets('Support shows no contact until one is configured', (
      tester,
    ) async {
      await pumpAccount(tester);
      await tapRow(tester, 'Help and support');

      // AppConfig.supportPhone/Email are empty unless passed at build time.
      // A support line that rings nowhere is worse than none, so the block is
      // absent rather than invented.
      expect(find.text('Talk to us'), findsNothing);
      expect(find.text('Copy details'), findsOneWidget);
    });
  });
}