import 'package:flutter_test/flutter_test.dart';
import 'package:tasq/models/leave_of_absence.model.dart';
import 'package:tasq/models/pass_slip.model.dart';
import 'package:tasq/utils/app_time.dart';
import 'package:tasq/utils/staff_presence.dart';

void main() {
  setUpAll(() {
    AppTime.initialize();
  });

  group('activeLeaveByUser', () {
    test('includes approved leave covering now', () {
      final now = AppTime.now();
      final startTime = now.subtract(Duration(hours: 1));
      final endTime = now.add(Duration(hours: 1));

      final leave = LeaveOfAbsence(
        id: 'leave1',
        userId: 'user1',
        leaveType: 'sick_leave',
        justification: 'Sick',
        startTime: startTime,
        endTime: endTime,
        status: 'approved',
        filedBy: 'admin',
        createdAt: now,
      );

      final result = activeLeaveByUser([leave], now);
      expect(result, containsPair('user1', leave));
    });

    test('excludes pending leave', () {
      final now = AppTime.now();
      final startTime = now.subtract(Duration(hours: 1));
      final endTime = now.add(Duration(hours: 1));

      final leave = LeaveOfAbsence(
        id: 'leave1',
        userId: 'user1',
        leaveType: 'sick_leave',
        justification: 'Sick',
        startTime: startTime,
        endTime: endTime,
        status: 'pending',
        filedBy: 'admin',
        createdAt: now,
      );

      final result = activeLeaveByUser([leave], now);
      expect(result, isEmpty);
    });

    test('excludes leave that ended before now', () {
      final now = AppTime.now();
      final startTime = now.subtract(Duration(hours: 3));
      final endTime = now.subtract(Duration(hours: 1));

      final leave = LeaveOfAbsence(
        id: 'leave1',
        userId: 'user1',
        leaveType: 'sick_leave',
        justification: 'Sick',
        startTime: startTime,
        endTime: endTime,
        status: 'approved',
        filedBy: 'admin',
        createdAt: now,
      );

      final result = activeLeaveByUser([leave], now);
      expect(result, isEmpty);
    });

    test('excludes leave that starts after now', () {
      final now = AppTime.now();
      final startTime = now.add(Duration(hours: 1));
      final endTime = now.add(Duration(hours: 3));

      final leave = LeaveOfAbsence(
        id: 'leave1',
        userId: 'user1',
        leaveType: 'sick_leave',
        justification: 'Sick',
        startTime: startTime,
        endTime: endTime,
        status: 'approved',
        filedBy: 'admin',
        createdAt: now,
      );

      final result = activeLeaveByUser([leave], now);
      expect(result, isEmpty);
    });
  });

  group('activePassSlipByUser', () {
    test('includes active pass slip', () {
      final slip = PassSlip(
        id: 'slip1',
        userId: 'user1',
        dutyScheduleId: 'sched1',
        reason: 'Test',
        status: 'approved',
        requestedAt: AppTime.now(),
        slipStart: AppTime.now(),
        slipEnd: null,
      );

      final result = activePassSlipByUser([slip]);
      expect(result, containsPair('user1', slip));
    });

    test('excludes pending pass slip', () {
      final slip = PassSlip(
        id: 'slip1',
        userId: 'user1',
        dutyScheduleId: 'sched1',
        reason: 'Test',
        status: 'pending',
        requestedAt: AppTime.now(),
        slipStart: null,
        slipEnd: null,
      );

      final result = activePassSlipByUser([slip]);
      expect(result, isEmpty);
    });

    test('excludes ended pass slip', () {
      final slip = PassSlip(
        id: 'slip1',
        userId: 'user1',
        dutyScheduleId: 'sched1',
        reason: 'Test',
        status: 'approved',
        requestedAt: AppTime.now(),
        slipStart: AppTime.now(),
        slipEnd: AppTime.now().add(Duration(hours: 1)),
      );

      final result = activePassSlipByUser([slip]);
      expect(result, isEmpty);
    });
  });

  group('approvedLeaveDays', () {
    test('single day leave returns one day key', () {
      // Sep 24, 08:00 to Sep 24, 17:00 Manila time → just Sep 24
      final start = AppTime.fromComponents(year: 2026, month: 9, day: 24, hour: 8, minute: 0);
      final end = AppTime.fromComponents(year: 2026, month: 9, day: 24, hour: 17, minute: 0);

      final leave = LeaveOfAbsence(
        id: 'leave1',
        userId: 'user1',
        leaveType: 'sick_leave',
        justification: 'Sick',
        startTime: start,
        endTime: end,
        status: 'approved',
        filedBy: 'admin',
        createdAt: DateTime.utc(2026, 9, 23),
      );

      final result = approvedLeaveDays([leave], 'user1');
      expect(result, contains(DateTime.utc(2026, 9, 24)));
      expect(result.length, 1);
    });

    test('multi-day leave returns all day keys', () {
      // Sep 24, 08:00 to Sep 25, 17:00 Manila time → Sep 24 and Sep 25
      final start = AppTime.fromComponents(year: 2026, month: 9, day: 24, hour: 8, minute: 0);
      final end = AppTime.fromComponents(year: 2026, month: 9, day: 25, hour: 17, minute: 0);

      final leave = LeaveOfAbsence(
        id: 'leave1',
        userId: 'user1',
        leaveType: 'vacation_leave',
        justification: 'Vacation',
        startTime: start,
        endTime: end,
        status: 'approved',
        filedBy: 'admin',
        createdAt: DateTime.utc(2026, 9, 23),
      );

      final result = approvedLeaveDays([leave], 'user1');
      expect(result, contains(DateTime.utc(2026, 9, 24)));
      expect(result, contains(DateTime.utc(2026, 9, 25)));
      expect(result.length, 2);
    });

    test('excludes pending leaves', () {
      final start = AppTime.fromComponents(year: 2026, month: 9, day: 24, hour: 8, minute: 0);
      final end = AppTime.fromComponents(year: 2026, month: 9, day: 25, hour: 17, minute: 0);

      final leave = LeaveOfAbsence(
        id: 'leave1',
        userId: 'user1',
        leaveType: 'vacation_leave',
        justification: 'Vacation',
        startTime: start,
        endTime: end,
        status: 'pending',
        filedBy: 'admin',
        createdAt: DateTime.utc(2026, 9, 23),
      );

      final result = approvedLeaveDays([leave], 'user1');
      expect(result, isEmpty);
    });

    test('filters by userId', () {
      final start = AppTime.fromComponents(year: 2026, month: 9, day: 24, hour: 8, minute: 0);
      final end = AppTime.fromComponents(year: 2026, month: 9, day: 25, hour: 17, minute: 0);

      final leave = LeaveOfAbsence(
        id: 'leave1',
        userId: 'user1',
        leaveType: 'vacation_leave',
        justification: 'Vacation',
        startTime: start,
        endTime: end,
        status: 'approved',
        filedBy: 'admin',
        createdAt: DateTime.utc(2026, 9, 23),
      );

      final result = approvedLeaveDays([leave], 'user2');
      expect(result, isEmpty);
    });

    test('handles multiple approved leaves for same user', () {
      final leave1 = LeaveOfAbsence(
        id: 'leave1',
        userId: 'user1',
        leaveType: 'sick_leave',
        justification: 'Sick',
        startTime: AppTime.fromComponents(year: 2026, month: 9, day: 24, hour: 8, minute: 0),
        endTime: AppTime.fromComponents(year: 2026, month: 9, day: 24, hour: 17, minute: 0),
        status: 'approved',
        filedBy: 'admin',
        createdAt: AppTime.fromComponents(year: 2026, month: 9, day: 23),
      );

      final leave2 = LeaveOfAbsence(
        id: 'leave2',
        userId: 'user1',
        leaveType: 'vacation_leave',
        justification: 'Vacation',
        startTime: AppTime.fromComponents(year: 2026, month: 9, day: 26, hour: 8, minute: 0),
        endTime: AppTime.fromComponents(year: 2026, month: 9, day: 27, hour: 17, minute: 0),
        status: 'approved',
        filedBy: 'admin',
        createdAt: AppTime.fromComponents(year: 2026, month: 9, day: 23),
      );

      final result = approvedLeaveDays([leave1, leave2], 'user1');
      expect(result, contains(DateTime.utc(2026, 9, 24)));
      expect(result, contains(DateTime.utc(2026, 9, 26)));
      expect(result, contains(DateTime.utc(2026, 9, 27)));
      expect(result.length, 3);
    });
  });
}