import 'package:drift/drift.dart' show driftRuntimeOptions;
import 'package:drift/native.dart';
import 'package:flutter/material.dart';
import 'package:flutter_map/flutter_map.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:rippr/src/app/providers.dart';
import 'package:rippr/src/data/database.dart';
import 'package:rippr/src/data/route_plan_repository.dart';
import 'package:rippr/src/ui/app_shell.dart';
import 'package:rippr/src/ui/components/floating_pill.dart';
import 'package:rippr/src/ui/format.dart';
import 'package:rippr/src/ui/routes/route_planner_screen.dart';
import 'package:rippr/src/ui/routes/routes_list_screen.dart';
import 'package:rippr/src/ui/theme.dart';

/// V3-07: the repository is already covered end to end in
/// route_plan_repository_test.dart (including "routes never appear in the rides list");
/// this covers the screens that drive it.
void main() {
  late AppDatabase db;
  late RoutePlanRepository repo;

  setUp(() {
    driftRuntimeOptions.dontWarnAboutMultipleDatabases = true;
    db = AppDatabase(NativeDatabase.memory());
    repo = RoutePlanRepository(db);
  });

  tearDown(() async => db.close());

  Widget host(Widget child) => ProviderScope(
    overrides: [databaseProvider.overrideWithValue(db)],
    child: MaterialApp(theme: ripprTheme(), home: child),
  );

  /// Same shape as widget_test.dart's `screenTest`: Drift's stream-query cache keeps a
  /// query alive briefly after its last listener leaves, which reads to `flutter_test`
  /// as a pending Timer unless the tree is fully torn down and pumped past the
  /// keep-alive window first.
  void screenTest(String description, Future<void> Function(WidgetTester) body) {
    testWidgets(description, (tester) async {
      await body(tester);
      await tester.pumpWidget(const SizedBox.shrink());
      await tester.pump(const Duration(seconds: 2));
    });
  }

  group('RoutesListScreen', () {
    screenTest('empty state explains what to do', (tester) async {
      await tester.pumpWidget(host(const RoutesListScreen()));
      await tester.pumpAndSettle();

      expect(find.textContaining('No routes yet'), findsOneWidget);
    });

    screenTest('tapping new route creates one and opens it', (tester) async {
      int? opened;
      await tester.pumpWidget(
        host(RoutesListScreen(onOpenRoute: (id) => opened = id)),
      );
      await tester.pumpAndSettle();

      await tester.tap(find.byKey(const Key('new-route')));
      await tester.pumpAndSettle();

      expect(opened, isNotNull);
      // Not `db.watchRoutePlans().first`: a fresh Stream subscription's first emission
      // depends on a Timer inside Drift's stream-query store that never fires under
      // flutter_test's fake zone without a pump driving it -- this hung for a real ten
      // minutes before being traced back to exactly that. A plain Future-returning call
      // has no such dependency.
      final plan = await repo.routePlanById(opened!);
      expect(plan, isNotNull);
    });

    screenTest('deleting a route removes it from the list', (tester) async {
      final id = await repo.createRoutePlan(1000, name: 'Coast loop');
      await tester.pumpWidget(host(const RoutesListScreen()));
      await tester.pumpAndSettle();

      expect(find.text('Coast loop'), findsOneWidget);

      await tester.tap(find.byKey(Key('delete-route-$id')));
      await tester.pumpAndSettle();

      expect(find.text('Coast loop'), findsNothing);
      expect(await repo.routePlanById(id), isNull);
    });
  });

  group('RoutePlannerScreen', () {
    // A real TileLayer tries real network fetches that never resolve in the test
    // harness, so `pumpAndSettle` would hang forever waiting for it to go idle --
    // exactly the reason record_screen's own map tests use a bounded pump instead (see
    // `pumpLive` in widget_test.dart). A few explicit frames are enough here too.
    Future<void> pumpMap(WidgetTester tester, Widget widget) async {
      await tester.pumpWidget(widget);
      // The waypoints stream (and therefore the map's initial camera, which is read
      // only once at construction -- see the screen's own comment) needs a handful of
      // frames to resolve its first value; a bounded loop rather than pumpAndSettle,
      // since once the map is up its TileLayer never goes idle in this harness.
      for (var i = 0; i < 10; i++) {
        await tester.pump(const Duration(milliseconds: 50));
      }
    }

    screenTest('tapping the map adds a pin and the distance label updates',
        (tester) async {
      final id = await repo.createRoutePlan(1000);
      await pumpMap(tester, host(RoutePlannerScreen(routeId: id)));

      // UI-06: no pins yet -- the "tap to drop a pin" tooltip shows, not a stat pill
      // (there is nothing to summarise yet).
      expect(find.textContaining('TAP TO DROP A PIN'), findsOneWidget);
      expect(find.byType(FloatingPill), findsNothing);

      await tester.tapAt(tester.getCenter(find.byType(FlutterMap)));
      await tester.pump(const Duration(milliseconds: 50));
      await tester.tapAt(
        tester.getCenter(find.byType(FlutterMap)) + const Offset(40, 40),
      );
      await tester.pump(const Duration(milliseconds: 50));

      final waypoints = await repo.waypointsFor(id);
      expect(waypoints, hasLength(2));

      // The tooltip is gone and the stat pill has taken its place, showing the real
      // pin count and a non-zero distance. Read the pill's own `stats` directly
      // rather than `find.text('2')` -- the second waypoint pin's own marker label
      // is also "2", so that text is no longer unique on screen.
      expect(find.textContaining('TAP TO DROP A PIN'), findsNothing);
      final pill = tester.widget<FloatingPill>(find.byType(FloatingPill));
      final pinsStat = pill.stats.firstWhere((s) => s.label == 'Pins');
      final distanceStat = pill.stats.firstWhere((s) => s.label == 'Distance');
      expect(pinsStat.value, '2');
      expect(distanceStat.value, isNot(formatDistance(0)),
          reason: 'the distance stat must reflect the two real pins, not stay zeroed');
    });

    screenTest('tapping a pin deletes it', (tester) async {
      // UI-06: a single waypoint (rather than two) -- with only one pin, the camera
      // centres exactly on it, keeping it clear of the floating "Start Route" button
      // now anchored at the bottom of the screen; two close pins previously landed
      // one of them directly underneath it in this test's fixed viewport.
      final id = await repo.createRoutePlan(1000);
      await repo.addWaypoint(id, 51.0, -114.0);

      await pumpMap(tester, host(RoutePlannerScreen(routeId: id)));

      // flutter_map's `Marker` is a plain data class, not a Widget -- it never appears
      // in the tree itself. `CircleAvatar` is what `_WaypointPin` actually renders.
      expect(find.byType(CircleAvatar), findsOneWidget);

      // Not `find.text('1')`: the FloatingPill's "Pins" stat also reads "1" with a
      // single waypoint, so the pin's own label text is no longer a unique match.
      await tester.tap(find.byType(CircleAvatar));
      await tester.pump();

      expect(await repo.waypointsFor(id), isEmpty);
    });

    screenTest('renaming writes through to the repository (UI-06: no app bar title '
        'to display it on any more)', (tester) async {
      final id = await repo.createRoutePlan(1000, name: 'Old name');
      await pumpMap(tester, host(RoutePlannerScreen(routeId: id)));

      // Rename now lives behind the floating overflow menu -- open it first.
      await tester.tap(find.byKey(const Key('route-overflow-menu')));
      await tester.pump();
      await tester.pump(const Duration(milliseconds: 300));
      await tester.pump();
      await tester.tap(find.byKey(const Key('rename-route')));
      await tester.pump(const Duration(milliseconds: 300));
      await tester.enterText(
        find.byKey(const Key('route-name-field')),
        'Sunday coast run',
      );
      await tester.tap(find.text('Save'));
      await tester.pump();

      final renamed = await repo.routePlanById(id);
      expect(renamed?.name, 'Sunday coast run');
    });

    screenTest('a missing route says so instead of a blank map', (tester) async {
      await tester.pumpWidget(host(const RoutePlannerScreen(routeId: 9999)));
      await tester.pumpAndSettle();

      expect(find.textContaining('no longer exists'), findsOneWidget);
    });

    screenTest('the offline-tiles download menu item is disabled with no pins '
        '(V3-11, UI-06: now a PopupMenuItem behind the overflow menu)',
        (tester) async {
      final id = await repo.createRoutePlan(1000);
      await pumpMap(tester, host(RoutePlannerScreen(routeId: id)));

      await tester.tap(find.byKey(const Key('route-overflow-menu')));
      await tester.pump();
      await tester.pump(const Duration(milliseconds: 300));
      await tester.pump();

      final item = tester.widget<PopupMenuItem<String>>(
        find.byKey(const Key('download-tiles')),
      );
      expect(item.enabled, isFalse);
    });

    screenTest('downloading shows a tile count and size estimate before any '
        'request (V3-11)', (tester) async {
      final id = await repo.createRoutePlan(1000);
      await repo.addWaypoint(id, 51.0, -114.0);
      await repo.addWaypoint(id, 51.01, -114.0);
      await pumpMap(tester, host(RoutePlannerScreen(routeId: id)));

      await tester.tap(find.byKey(const Key('route-overflow-menu')));
      await tester.pump();
      await tester.pump(const Duration(milliseconds: 300));
      await tester.pump();

      final item = tester.widget<PopupMenuItem<String>>(
        find.byKey(const Key('download-tiles')),
      );
      expect(item.enabled, isTrue);

      await tester.tap(find.byKey(const Key('download-tiles')));
      // Bounded, not pumpAndSettle: the confirmation dialog is safe to settle (no
      // network involved yet), but this test stops before confirming, precisely to
      // avoid needing a fake HTTP layer for what the pure downloadTiles/tile_cache/
      // tile_math test suites already cover directly.
      await tester.pump();
      await tester.pump(const Duration(milliseconds: 50));

      expect(find.textContaining('Download'), findsWidgets);
      expect(find.textContaining('tiles?'), findsOneWidget);
      expect(find.textContaining('MB'), findsOneWidget);
    });

    screenTest('the shell nav bar correctly shows Plan active on this screen '
        '(UI-06)', (tester) async {
      final id = await repo.createRoutePlan(1000);
      await pumpMap(
        tester,
        host(
          ShellScaffold(
            currentIndex: 2, // Map, Rides, Plan, Settings -- Plan is index 2.
            onDestinationSelected: (_) {},
            child: RoutePlannerScreen(routeId: id),
          ),
        ),
      );

      final navBar = tester.widget<NavigationBar>(find.byKey(const Key('shell-nav-bar')));
      expect(navBar.selectedIndex, 2,
          reason: 'not the mockup\'s own generation error (it showed Rides active '
              'while viewing Plan) -- the shipped nav bar must reflect the real tab');
    });
  });
}