import 'package:flutter/material.dart';
import 'package:lucide_icons_flutter/lucide_icons.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:miler/views/Dashboard/pickups/stop_verify.dart';

/// The verification page is the only place the app records what actually
/// happened at a door, so the thing worth testing is the gate: which legs it
/// runs for each stop kind, and that it refuses to advance until the proof for
/// the current leg exists.
void main() {
  /// Pumps the page on a phone-shaped surface. The default 800×600 test window
  /// makes ScreenUtil scale width up and height down at once, which is not a
  /// shape any phone has — layouts that are fine on device fail there for the
  /// wrong reason.
  Future<void> pumpStop(WidgetTester tester, Map<String, dynamic> stop) async {
    tester.view.physicalSize = const Size(1170, 2532); // iPhone 13, @3x
    tester.view.devicePixelRatio = 3.0;
    addTearDown(tester.view.resetPhysicalSize);
    addTearDown(tester.view.resetDevicePixelRatio);

    await tester.pumpWidget(
      ScreenUtilInit(
        designSize: const Size(390, 844),
        builder: (_, _) =>
            MaterialApp(home: StopVerificationPage(pickup: stop)),
      ),
    );
    await tester.pumpAndSettle();
  }

  Map<String, dynamic> stopOf({
    required String type,
    int deliveryQty = 0,
    int pickupQty = 0,
    double cash = 0,
  }) => <String, dynamic>{
    'orderid': 'T-1',
    'type': type,
    'pickupcustomer': 'Priya Sharma',
    'pickupaddress': '45, Lake View Apartments, Coimbatore',
    if (deliveryQty > 0) 'deliveryqty': '$deliveryQty',
    if (pickupQty > 0) 'pickupqty': '$pickupQty',
    'Quantity': '${pickupQty > 0 ? pickupQty : deliveryQty}',
    if (cash > 0) 'collectionamt': '$cash',
  };

  testWidgets('a pickup stop runs one collect leg', (tester) async {
    await pumpStop(tester, stopOf(type: 'pickup', pickupQty: 3));

    expect(find.text('Verify pickup'), findsOneWidget);
    expect(find.text('Collect'), findsOneWidget); // stepper
    expect(find.text('Confirm'), findsOneWidget);
    expect(find.text('Hand over'), findsNothing);

    // The collect leg's own controls.
    expect(find.text('Parcels collected'), findsOneWidget);
    expect(find.text('of 3 booked'), findsOneWidget);
    expect(find.text('Pickup code'), findsOneWidget);
  });

  testWidgets(
    'a delivery stop runs one hand-over leg with a parcel checklist',
    (tester) async {
      await pumpStop(tester, stopOf(type: 'delivery', deliveryQty: 2));

      expect(find.text('Verify delivery'), findsOneWidget);
      expect(find.text('Hand over'), findsOneWidget);
      expect(find.text('Collect'), findsNothing);

      // One tile per parcel — this is what stops a 2-parcel drop closing on 1.
      expect(find.text('Parcel 1 of 2'), findsOneWidget);
      expect(find.text('Parcel 2 of 2'), findsOneWidget);
      expect(find.text('Who received it?'), findsOneWidget);
      expect(find.text('Delivery OTP'), findsOneWidget);

      // Nothing about weight or condition on a delivery.
      expect(find.text('Condition'), findsNothing);
    },
  );

  testWidgets('a combined stop runs hand over, then collect', (tester) async {
    await pumpStop(
      tester,
      stopOf(type: 'combined', deliveryQty: 1, pickupQty: 2),
    );

    expect(find.text('Verify stop'), findsOneWidget);
    // Three steps, delivery first — the rider walks up holding the outbound
    // parcel, so he hands it over before taking anything back.
    expect(find.text('Hand over'), findsOneWidget);
    expect(find.text('Collect'), findsOneWidget);
    expect(find.text('Confirm'), findsOneWidget);

    // Both loads are on the summary.
    expect(find.text('Hand over 1'), findsOneWidget);
    expect(find.text('Collect 2'), findsOneWidget);

    // Step 1 is the delivery leg.
    expect(find.text('Hand over the parcels'), findsOneWidget);
    expect(find.text('Parcels collected'), findsNothing);
  });

  testWidgets('the delivery leg will not advance without its proof', (
    tester,
  ) async {
    await pumpStop(tester, stopOf(type: 'delivery', deliveryQty: 1));

    // Blocked from the start, and the bar says what is missing next.
    expect(find.text('1 parcel still to hand over'), findsOneWidget);

    await tester.tap(find.text('Parcel 1 of 1'));
    await tester.pumpAndSettle();
    expect(find.text('Enter the OTP from the customer'), findsOneWidget);

    await tester.enterText(find.byType(TextField).first, '482156');
    await tester.pumpAndSettle();
    expect(find.text('Take a proof photo'), findsOneWidget);

    // Still on step 1 — the camera is the last gate and cannot be faked here.
    expect(find.text('Hand over the parcels'), findsOneWidget);
  });

  testWidgets('handing over to a third party demands their name', (
    tester,
  ) async {
    await pumpStop(tester, stopOf(type: 'delivery', deliveryQty: 1));

    await tester.tap(find.text('Parcel 1 of 1'));
    await tester.pumpAndSettle();

    expect(find.text("Person's name"), findsNothing);
    await tester.tap(find.text('Security'));
    await tester.pumpAndSettle();

    expect(find.text("Person's name"), findsOneWidget);
    expect(
      find.text('Enter the name of the person who took it'),
      findsOneWidget,
    );
  });

  testWidgets('a short count forces a written reason', (tester) async {
    await pumpStop(tester, stopOf(type: 'pickup', pickupQty: 3));

    // Pre-set to the booked count, so the common case needs no explanation.
    expect(find.text('3'), findsOneWidget);
    expect(find.text('What happened?'), findsNothing);

    await tester.tap(find.byIcon(LucideIcons.minus));
    await tester.pumpAndSettle();

    expect(find.text('1 fewer than the parcels booked'), findsOneWidget);
    expect(find.text('What happened?'), findsOneWidget);
  });

  testWidgets('damaged goods force a written reason too', (tester) async {
    await pumpStop(tester, stopOf(type: 'pickup', pickupQty: 1));

    expect(find.text('What happened?'), findsNothing);
    await tester.tap(find.text('Damaged'));
    await tester.pumpAndSettle();
    expect(find.text('What happened?'), findsOneWidget);
  });

  testWidgets('COD is surfaced on the stop summary', (tester) async {
    await pumpStop(tester, stopOf(type: 'pickup', pickupQty: 1, cash: 720));
    expect(find.text('₹720 to collect'), findsOneWidget);
  });
}