@Tags(['shots'])
library;

import 'dart:io';

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

import 'support/golden_fonts.dart';
import 'package:get/get.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'package:miler/data/service_profile.dart';
import 'package:miler/views/helpers/constants/Font_constant.dart';
import 'package:miler/views/Dashboard/home/trip.dart';
import 'package:miler/views/Dashboard/home/trip_card.dart';
import 'package:miler/views/helpers/constants/Colorconstants.dart';
import 'package:miler/views/helpers/constants/miler_surface.dart';
import 'package:miler/views/offline/offline_banner.dart';

/// Throwaway visual harness for Home's route block.
///
/// `_HomepageState` cannot be pumped — Get, SharedPreferences, Geolocator, live
/// fetches — but [TripCard] is a pure `StatelessWidget` over a [Trip] plus the
/// accepted / rejected / selected / collected id sets, which is exactly the
/// surface being redesigned. Run with `--update-goldens`.
void main() {
  setUpAll(() async {
    // ── The harness must load the family the app asks for ──
    //
    // `FontConstants.fontFamily` is what every style names, and a golden
    // rendered without that family loaded is a picture of the fallback — which
    // is how a font regression gets baked into a reference image and then
    // asserted against forever. Poppins ships as separate weight files, so each
    // one is registered under the same family with its own `FontWeight`;
    // without that, `w800` headings render as smeared SemiBold in the goldens
    // and nowhere else.
    await loadGoldenFonts();
  });

  tearDown(() {
    Get.reset();
    ServiceProfile.setActive(ServiceProfile.parcel);
  });

  final now = DateTime.now();

  Map<String, dynamic> order(
    String id,
    String customer,
    String kitchenId,
    String kitchenName, {
    String address = '12, SNS Colony, Peelamedu, Coimbatore 641004',
    String status = 'new',
    String? bagLabel,
    int minsOut = 20,
    double lat = 11.0168,
    double lng = 76.9558,
  }) => {
    'orderid': id,
    'tripid': 'T1',
    'type': 'delivery',
    'pickupcustomer': customer,
    'pickupaddress': address,
    'dropaddress': address,
    'orderstatus': status,
    'kitchenid': kitchenId,
    'kitchenname': kitchenName,
    // The kitchen's number. Without it the card's Call control is correctly
    // suppressed — a dead button on a card is worse than no button — so the
    // fixture has to carry one for the shots to show the state at all.
    'pickupcontactno': '9787698259',
    if (bagLabel != null) 'baglabel': bagLabel,
    'Quantity': 1,
    'expected_pickup_time': now
        .add(Duration(minutes: minsOut))
        .toIso8601String(),
    // ── `pickuplon`, not `pickuplng` ──
    //
    // The fixture used `pickuplng`, which no reader in the app looks for:
    // `Trip._coordsOf` and `RouteMetricsHelper.metersToStop` both read
    // `pickuplon` / `PickupLon`. So every stop in this harness was silently
    // coordinate-less, every leg estimate came out zero, and the shots have
    // been showing the no-distance degradation while claiming to show a route.
    'pickuplat': lat,
    'pickuplon': lng,
    'droplat': lat + 0.004,
    'droplon': lng + 0.004,
  };

  /// One kitchen's orders. [away] nudges the whole group off the rider's own
  /// position so each kitchen sits at a different, plausible distance — which
  /// is the thing the header's journey column exists to show.
  List<Map<String, dynamic>> kitchen(
    String id,
    String name,
    List<String> customers, {
    String status = 'new',
    int startAt = 1,
    double away = 0.02,
  }) => [
    for (var i = 0; i < customers.length; i++)
      order(
        '$id-${startAt + i}',
        customers[i],
        id,
        name,
        status: status,
        minsOut: 15 + i * 4,
        lat: 11.0168 + away,
        lng: 76.9558 + away,
      ),
  ];

  Future<void> shoot(
    WidgetTester tester,
    String name, {
    required List<Map<String, dynamic>> stops,
    Set<String> accepted = const {},
    Set<String> rejected = const {},
    Set<String> selected = const {},
    Set<String> collected = const {},
    ServiceProfile profile = ServiceProfile.milkMan,
    double height = 1400,
    double width = 390,
    double textScale = 1.0,
    bool offline = false,
    Future<void> Function(WidgetTester)? settle,
  }) async {
    ServiceProfile.setActive(profile);
    SharedPreferences.setMockInitialValues({'userid': 1});

    tester.view.physicalSize = Size(width * 3, height * 3);
    tester.view.devicePixelRatio = 3.0;
    addTearDown(tester.view.reset);

    final trip = Trip.groupIntoTrips(stops).first;

    await tester.pumpWidget(
      // ── Phone-scale layout on a taller canvas ──
      //
      // ScreenUtil derives `.h` from the *view* height, so rendering a 1800pt
      // surface against a 844pt design size multiplies every vertical token by
      // 2.13 and the screenshot lies about the spacing. Overriding MediaQuery
      // to the real phone keeps the scale honest; the surface stays tall so the
      // whole page fits in one frame.
      // ── Phone-scale layout on a taller canvas ──
      //
      // ScreenUtil derives `.w`/`.h` from the *view*, so a 1800pt surface
      // against a 844pt design size multiplies every vertical token by 2.13 and
      // the screenshot lies about the spacing. Declaring the design size as the
      // surface makes both factors exactly 1 — which is what a real 390×844
      // phone produces against the app's own design size.
      ScreenUtilInit(
        designSize: Size(width, height),
        builder: (_, _) => MaterialApp(
          debugShowCheckedModeBanner: false,
          home: MediaQuery(
            data: MediaQueryData(textScaler: TextScaler.linear(textScale)),
            child: Scaffold(
              // The ground `MilerSheet` actually paints on Home — the
              // **canvas**, not white. This said working, and it was wrong:
              // `homepage.dart` builds `MilerSheet(color: _surfaceColor)` with
              // `_surfaceColor = daylightSurface`. So every shot in here was
              // taken on a white page while the device drew a grey one, and
              // the flatness the screen actually had could not appear in its
              // own reference images. See [MilerPanel].
              backgroundColor: MilerSurface.canvas,
              body: OfflineScope(
                offline: offline,
                child: SingleChildScrollView(
                  child: TripCard(
                    trip: trip,
                    // Where the rider is standing. Home passes the live
                    // geocoded fix; the shots pin one so the distance column
                    // renders the same numbers on every run.
                    riderLat: 11.0168,
                    riderLng: 76.9558,
                    acceptedIds: accepted,
                    rejectedIds: rejected,
                    selectedIds: selected,
                    collectedIds: collected,
                    onToggleSelect: (_) {},
                    onSelectAll: (_) {},
                    onStopTap: (_) {},
                    onCallStop: (_) {},
                    onNavigateStop: (_) {},
                    onAdvanceStop: (_) {},
                    onViewRoute: () {},
                    // Supplied so the card's "i" renders — without a preview
                    // callback the control is correctly suppressed, and the
                    // shots would show a state the app never has.
                    onPreviewGroup: (_) {},
                    onContinueStop: (_) {},
                  ),
                ),
              ),
            ),
          ),
        ),
      ),
    );

    await tester.pump();
    for (var i = 0; i < 25; i++) {
      await tester.pump(const Duration(milliseconds: 80));
    }
    // Drive the screen into the state being photographed — a tap, a scroll —
    // after the first settle and before the shot.
    if (settle != null) await settle(tester);

    // ── A build failure must not become a golden ──
    //
    // This was `while (tester.takeException() != null) {}` — every exception
    // swallowed, silently. A negative `Container.margin` (which asserts, via
    // `Padding`) therefore replaced a whole pickup group with a `RenderErrorBox`
    // and the harness cheerfully wrote it to disk as the new reference image.
    // A screenshot suite that cannot fail is not a test.
    final error = tester.takeException();
    expect(
      error,
      isNull,
      reason: 'shots/home_$name.png would have captured a build failure',
    );

    await expectLater(
      find.byType(MaterialApp),
      matchesGoldenFile('shots/home_$name.png'),
    );
  }

  final vidhya = kitchen('K1', 'Vidhya Kitchen', [
    'Joe Mathew',
    'Arun Prakash',
    'Ravi Kumar',
    'Priya Nair',
    'Kumar S',
  ]);
  final joe = kitchen(
    'K2',
    'Joe Kitchen',
    ['Lakshmi R', 'Anitha Ramesh', 'Deepa Menon'],
    startAt: 10,
    away: 0.031,
  );
  final third = kitchen(
    'K3',
    'Anna Kitchen',
    ['Suresh B', 'Meena T', 'Vijay K', 'Nandini P'],
    startAt: 20,
    away: 0.047,
  );

  testWidgets('one kitchen, five orders', (t) async {
    await shoot(t, 'one_kitchen', stops: vidhya, height: 1800);
  });

  // ── The brief opened ──
  //
  // It defaults closed, so every reference shot on this screen was taken with
  // the day's figures hidden — and the figures are most of what a rider looks
  // at when he opens Home, which is the state a device screenshot caught the
  // moment anyone tapped it. A state with no reference image is a state
  // nobody reviews.
  testWidgets('the trip brief opened', (t) async {
    await shoot(
      t,
      'brief_open',
      stops: [...vidhya, ...joe],
      height: 2400,
      settle: (tester) async {
        await tester.tap(find.textContaining('stops left').first);
        for (var i = 0; i < 25; i++) {
          await tester.pump(const Duration(milliseconds: 80));
        }
      },
    );
  });

  testWidgets('two kitchens', (t) async {
    await shoot(t, 'two_kitchens', stops: [...vidhya, ...joe], height: 2400);
  });

  testWidgets('three kitchens', (t) async {
    await shoot(
      t,
      'three_kitchens',
      stops: [...vidhya, ...joe, ...third],
      height: 3000,
    );
  });

  testWidgets('accepted', (t) async {
    await shoot(
      t,
      'accepted',
      stops: [...vidhya, ...joe],
      accepted: {for (final s in vidhya) s['orderid'] as String},
      height: 2400,
    );
  });

  testWidgets('selected', (t) async {
    await shoot(
      t,
      'selected',
      stops: [...vidhya, ...joe],
      accepted: {for (final s in vidhya) s['orderid'] as String},
      selected: {for (final s in vidhya.take(3)) s['orderid'] as String},
      height: 2400,
    );
  });

  testWidgets('arrived', (t) async {
    await shoot(
      t,
      'arrived',
      stops: [
        ...kitchen('K1', 'Vidhya Kitchen', [
          'Joe Mathew',
          'Arun Prakash',
          'Ravi Kumar',
          'Priya Nair',
          'Kumar S',
        ], status: 'arrived'),
        ...joe,
      ],
      accepted: {for (final s in vidhya) s['orderid'] as String},
      height: 2400,
    );
  });

  testWidgets('one group picked, another active', (t) async {
    await shoot(
      t,
      'group_done',
      stops: [...vidhya, ...joe],
      accepted: {
        for (final s in [...vidhya, ...joe]) s['orderid'] as String,
      },
      collected: {for (final s in vidhya) s['orderid'] as String},
      height: 2000,
    );
  });

  testWidgets('long names', (t) async {
    await shoot(
      t,
      'long_text',
      stops: kitchen(
        'K9',
        'Sri Venkateswara Subramanian Cloud Kitchen & Catering Services',
        [
          'Venkataraman Subramanian Balasubramaniam',
          'Chandrasekaran Muthukrishnan',
          'Ravi',
        ],
      ),
      height: 1600,
    );
  });

  testWidgets('offline', (t) async {
    await shoot(t, 'offline', stops: vidhya, offline: true, height: 1800);
  });

  testWidgets('parcel line', (t) async {
    await shoot(
      t,
      'parcel',
      stops: vidhya,
      profile: ServiceProfile.parcel,
      height: 1800,
    );
  });

  testWidgets('text scale 1.3x', (t) async {
    await shoot(
      t,
      'scale_1_3x',
      stops: [...vidhya, ...joe],
      textScale: 1.3,
      height: 3000,
    );
  });

  // ── The states the redesign has to survive, not just the happy one ──
  //
  // Everything above was the shape the screen was designed against. These are
  // the ones that break compositions: a full selection (where the bar owns the
  // screen and the group's journey action must stand down), a picked-out run
  // (nothing left to decide), and the two text-scale extremes.

  testWidgets('all selected', (t) async {
    await shoot(
      t,
      'all_selected',
      stops: [...vidhya, ...joe],
      accepted: {for (final s in vidhya) s['orderid'] as String},
      selected: {for (final s in vidhya) s['orderid'] as String},
      height: 2400,
    );
  });

  testWidgets('pending, nothing decided yet', (t) async {
    await shoot(t, 'pending', stops: [...vidhya, ...joe], height: 2400);
  });

  testWidgets('the whole run is collected', (t) async {
    await shoot(
      t,
      'run_complete',
      stops: [...vidhya, ...joe],
      accepted: {
        for (final s in [...vidhya, ...joe]) s['orderid'] as String,
      },
      collected: {
        for (final s in [...vidhya, ...joe]) s['orderid'] as String,
      },
      height: 1400,
    );
  });

  testWidgets('text scale 2.0x on a 320pt phone', (t) async {
    await shoot(
      t,
      'scale_2x',
      stops: vidhya,
      accepted: {for (final s in vidhya) s['orderid'] as String},
      textScale: 2.0,
      width: 320,
      height: 3000,
    );
  });
}