import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:tasq/models/leave_of_absence.dart';
import 'package:tasq/models/profile.dart';
import 'package:tasq/screens/attendance/attendance_screen.dart';
import 'package:tasq/providers/leave_provider.dart';
import 'package:tasq/providers/profile_provider.dart';
import 'package:tasq/utils/app_time.dart';
import 'package:flutter_dotenv/flutter_dotenv.dart';

void main() {
  testWidgets('Leave tab updates when stream emits new data', (
    WidgetTester tester,
  ) async {
    AppTime.initialize();
    await dotenv.load();
    final controller = StreamController<List<LeaveOfAbsence>>();

    final user = Profile(
      id: 'u1',
      role: 'it_staff',
      fullName: 'Staff',
      avatarUrl: null,
      allowTracking: false,
    );

    // start with empty list
    controller.add([]);

    await tester.pumpWidget(
      ProviderScope(
        overrides: [
          profilesProvider.overrideWith((ref) => Stream.value([user])),
          currentProfileProvider.overrideWith((ref) => Stream.value(user)),
          leavesProvider.overrideWith((ref) => controller.stream),
          currentUserIdProvider.overrideWithValue(user.id),
        ],
        child: const MaterialApp(home: Scaffold(body: AttendanceScreen())),
      ),
    );

    // go to Leave tab
    await tester.pumpAndSettle();
    await tester.tap(find.text('Leave'));
    await tester.pumpAndSettle();

    // initially no leaves
    expect(find.text('You have no leave applications.'), findsOneWidget);

    // push a new pending leave for the user
    final now = AppTime.now();
    final leave = LeaveOfAbsence(
      id: 'l1',
      userId: user.id,
      leaveType: 'sick_leave',
      justification: 'sick',
      startTime: now,
      endTime: now.add(const Duration(hours: 8)),
      status: 'pending',
      filedBy: user.id,
      createdAt: now,
    );
    controller.add([leave]);
    await tester.pumpAndSettle();

    // the leave should now appear in "My Leave Applications" using the
    // human-readable label
    expect(find.text('Sick Leave'), findsOneWidget);
    expect(find.text('PENDING'), findsOneWidget);

    controller.close();
  });
}