import { DashboardService } from './dashboard.service';
import { PrismaService } from '../prisma/prisma.service';

describe('DashboardService', () => {
  let service: DashboardService;
  let prisma: {
    apiary: { count: jest.Mock };
    colony: { count: jest.Mock; findMany: jest.Mock };
    queen: { count: jest.Mock };
    task: { count: jest.Mock; findMany: jest.Mock };
    honeyBatch: { count: jest.Mock };
    stockItem: { findMany: jest.Mock };
    swarmControlCheck: { findMany: jest.Mock };
  };

  beforeEach(() => {
    prisma = {
      apiary: { count: jest.fn().mockResolvedValue(2) },
      colony: {
        count: jest.fn().mockResolvedValue(5),
        findMany: jest.fn().mockResolvedValue([]),
      },
      queen: { count: jest.fn().mockResolvedValue(4) },
      task: {
        count: jest.fn().mockResolvedValue(3),
        findMany: jest.fn().mockResolvedValue([]),
      },
      honeyBatch: { count: jest.fn().mockResolvedValue(1) },
      stockItem: { findMany: jest.fn().mockResolvedValue([]) },
      swarmControlCheck: { findMany: jest.fn().mockResolvedValue([]) },
    };
    service = new DashboardService(prisma as unknown as PrismaService);
  });

  it('summary counts low-stock items below their minimum threshold', async () => {
    prisma.stockItem.findMany.mockResolvedValue([
      { id: 'item-1', quantity: 2, minThreshold: 5 },
      { id: 'item-2', quantity: 10, minThreshold: 5 },
    ]);

    const summary = await service.summary();

    expect(summary.stockItemsLowCount).toBe(1);
    expect(summary.apiariesActive).toBe(2);
    expect(summary.coloniesActive).toBe(5);
  });

  it('alerts flags overdue tasks, attention colonies, and low stock', async () => {
    prisma.task.findMany.mockResolvedValue([
      { id: 'task-1', title: 'Beute prüfen' },
    ]);
    prisma.colony.findMany.mockResolvedValue([
      { id: 'colony-1', code: 'V-001', status: 'WEAK' },
    ]);
    prisma.stockItem.findMany.mockResolvedValue([
      { id: 'item-1', name: 'Zuckerlösung', quantity: 2, minThreshold: 5 },
    ]);

    const alerts = await service.alerts();

    expect(alerts).toHaveLength(3);
    expect(alerts.map((alert) => alert.type)).toEqual([
      'OVERDUE_TASK',
      'COLONY_ATTENTION',
      'LOW_STOCK',
    ]);
  });

  it('flags a colony whose most recent swarm check is overdue', async () => {
    prisma.swarmControlCheck.findMany.mockResolvedValue([
      {
        colonyId: 'colony-1',
        nextCheckDate: new Date('2020-01-01'),
        colony: { code: 'V-001' },
      },
    ]);

    const alerts = await service.alerts();

    expect(alerts).toEqual([
      {
        type: 'OVERDUE_SWARM_CHECK',
        message: 'Schwarmkontrolle für Volk V-001 überfällig',
        relatedType: 'Colony',
        relatedId: 'colony-1',
      },
    ]);
  });

  it('ignores an overdue swarm check when a newer check already superseded it', async () => {
    prisma.swarmControlCheck.findMany.mockResolvedValue([
      {
        colonyId: 'colony-1',
        date: new Date('2026-06-10'),
        nextCheckDate: null,
        colony: { code: 'V-001' },
      },
      {
        colonyId: 'colony-1',
        date: new Date('2026-06-01'),
        nextCheckDate: new Date('2020-01-01'),
        colony: { code: 'V-001' },
      },
    ]);

    const alerts = await service.alerts();

    expect(alerts).toHaveLength(0);
  });

  describe('OLD_QUEEN', () => {
    it('flags a colony whose queen is at least 3 years old', async () => {
      prisma.colony.findMany
        .mockResolvedValueOnce([]) // attentionColonies
        .mockResolvedValueOnce([
          { id: 'colony-1', code: 'V-001', currentQueen: { hatchYear: 2020 } },
        ]);

      const alerts = await service.alerts();

      expect(alerts).toHaveLength(1);
      expect(alerts[0].type).toBe('OLD_QUEEN');
      expect(alerts[0].relatedId).toBe('colony-1');
    });

    it('does not flag a queen younger than the threshold', async () => {
      const currentYear = new Date().getFullYear();
      prisma.colony.findMany.mockResolvedValueOnce([]).mockResolvedValueOnce([
        {
          id: 'colony-1',
          code: 'V-001',
          currentQueen: { hatchYear: currentYear },
        },
      ]);

      const alerts = await service.alerts();

      expect(alerts).toHaveLength(0);
    });
  });
});