import { Prisma } from '../../generated/prisma';
import { AuditLogService } from '../audit/audit-log.service';
import { PrismaService } from '../prisma/prisma.service';
import { ApiaryRestrictionsService } from './apiary-restrictions.service';

const day = (value: string): Date => new Date(`${value}T00:00:00.000Z`);

describe('ApiaryRestrictionsService', () => {
  let service: ApiaryRestrictionsService;
  let tx: {
    $queryRaw: jest.Mock;
    apiary: { findMany: jest.Mock };
    apiaryRestriction: {
      create: jest.Mock;
      update: jest.Mock;
      findUnique: jest.Mock;
    };
  };
  let prisma: {
    apiary: { findUnique: jest.Mock };
    apiaryRestriction: { findMany: jest.Mock; findUnique: jest.Mock };
    $transaction: jest.Mock;
  };
  let auditLog: { record: jest.Mock };

  beforeEach(() => {
    tx = {
      $queryRaw: jest.fn().mockResolvedValue([]),
      apiary: { findMany: jest.fn() },
      apiaryRestriction: {
        create: jest.fn(),
        update: jest.fn(),
        findUnique: jest.fn(),
      },
    };
    prisma = {
      apiary: { findUnique: jest.fn() },
      apiaryRestriction: { findMany: jest.fn(), findUnique: jest.fn() },
      $transaction: jest.fn((callback: (txArg: typeof tx) => unknown) =>
        callback(tx),
      ),
    };
    auditLog = { record: jest.fn().mockResolvedValue(undefined) };
    service = new ApiaryRestrictionsService(
      prisma as unknown as PrismaService,
      auditLog as unknown as AuditLogService,
    );
  });

  function lockStatements(): string[] {
    return (tx.$queryRaw.mock.calls as [Prisma.Sql][]).map(
      ([query]) => query.sql,
    );
  }

  describe('create', () => {
    const dto = {
      apiaryIds: ['a2', 'a1'],
      disease: 'Faulbrut',
      startsOn: '2026-10-01',
    };

    it('creates one row per apiary in one transaction, audits each, locks the apiaries first', async () => {
      tx.apiary.findMany.mockResolvedValue([{ id: 'a1' }, { id: 'a2' }]);
      tx.apiaryRestriction.create.mockImplementation(
        ({ data }: { data: { apiaryId: string } }) =>
          Promise.resolve({ id: `r-${data.apiaryId}`, ...data }),
      );

      const created = await service.create(dto, 'user-1');

      expect(created.map((row) => row.apiaryId)).toEqual(['a1', 'a2']);
      expect(prisma.$transaction).toHaveBeenCalledTimes(1);
      expect(lockStatements()).toEqual([
        'SELECT id FROM "Apiary" WHERE id = ANY(?) ORDER BY id FOR UPDATE',
      ]);
      const [[firstRow]] = tx.apiaryRestriction.create.mock.calls as [
        [{ data: Record<string, unknown> }],
      ];
      expect(firstRow.data).toMatchObject({
        apiaryId: 'a1',
        disease: 'Faulbrut',
        startsOn: day('2026-10-01'),
        createdByUserId: 'user-1',
      });
      expect(auditLog.record).toHaveBeenCalledTimes(2);
      expect(auditLog.record).toHaveBeenCalledWith(
        expect.objectContaining({
          entityType: 'ApiaryRestriction',
          action: 'CREATE',
          userId: 'user-1',
        }),
        tx,
      );
      expect(tx.$queryRaw.mock.invocationCallOrder[0]).toBeLessThan(
        tx.apiaryRestriction.create.mock.invocationCallOrder[0],
      );
    });

    it('rolls all back when one apiary is unknown (404 after the lock, nothing written)', async () => {
      tx.apiary.findMany.mockResolvedValue([{ id: 'a1' }]);

      await expect(service.create(dto, 'user-1')).rejects.toMatchObject({
        status: 404,
      });
      expect(tx.$queryRaw).toHaveBeenCalledTimes(1);
      expect(tx.apiaryRestriction.create).not.toHaveBeenCalled();
      expect(auditLog.record).not.toHaveBeenCalled();
    });

    it('rejects an endsOn before startsOn with 400 before any lock', async () => {
      await expect(
        service.create({ ...dto, endsOn: '2026-09-30' }, 'user-1'),
      ).rejects.toMatchObject({ status: 400 });
      expect(prisma.$transaction).not.toHaveBeenCalled();
    });

    it('rejects no apiary and more than 50 apiaries with 400', async () => {
      const ids = Array.from({ length: 51 }, (_, index) => `a${index}`);

      await expect(
        service.create({ ...dto, apiaryIds: ids }, 'user-1'),
      ).rejects.toMatchObject({ status: 400 });
      await expect(
        service.create({ ...dto, apiaryIds: [] }, 'user-1'),
      ).rejects.toMatchObject({ status: 400 });
      expect(prisma.$transaction).not.toHaveBeenCalled();
    });
  });

  describe('update', () => {
    const stored = {
      id: 'r1',
      apiaryId: 'a1',
      disease: 'Faulbrut',
      startsOn: day('2026-10-01'),
      endsOn: null as Date | null,
    };

    beforeEach(() => {
      prisma.apiaryRestriction.findUnique.mockResolvedValue(stored);
      tx.apiaryRestriction.findUnique.mockResolvedValue(stored);
      tx.apiaryRestriction.update.mockImplementation(
        ({ data }: { data: object }) => Promise.resolve({ ...stored, ...data }),
      );
    });

    it('locks the apiary FOR UPDATE, then the restriction, then reads before', async () => {
      await service.update('r1', { endsOn: '2026-10-20' }, 'user-1');

      expect(lockStatements()).toEqual([
        'SELECT id FROM "Apiary" WHERE id = ANY(?) ORDER BY id FOR UPDATE',
        'SELECT id FROM "ApiaryRestriction" WHERE id = ? FOR UPDATE',
      ]);
      expect(tx.$queryRaw.mock.invocationCallOrder[1]).toBeLessThan(
        tx.apiaryRestriction.findUnique.mock.invocationCallOrder[0],
      );
    });

    it('ending a restriction is an update of endsOn, nothing is deleted', async () => {
      const result = await service.update(
        'r1',
        { endsOn: '2026-10-20' },
        'user-1',
      );

      expect(tx.apiaryRestriction.update).toHaveBeenCalledWith({
        where: { id: 'r1' },
        data: { endsOn: day('2026-10-20') },
      });
      expect(result.endsOn).toEqual(day('2026-10-20'));
      expect(auditLog.record).toHaveBeenCalledWith(
        expect.objectContaining({
          entityType: 'ApiaryRestriction',
          entityId: 'r1',
          action: 'UPDATE',
          beforeData: stored,
        }),
        tx,
      );
    });

    it('null clears endsOn', async () => {
      tx.apiaryRestriction.findUnique.mockResolvedValue({
        ...stored,
        endsOn: day('2026-10-20'),
      });

      await service.update('r1', { endsOn: null }, 'user-1');

      expect(tx.apiaryRestriction.update).toHaveBeenCalledWith({
        where: { id: 'r1' },
        data: { endsOn: null },
      });
    });

    it('checks endsOn >= startsOn on the merged state (400)', async () => {
      await expect(
        service.update('r1', { endsOn: '2026-09-30' }, 'user-1'),
      ).rejects.toMatchObject({ status: 400 });
      await expect(
        service.update('r1', { startsOn: '2026-11-01' }, 'user-1'),
      ).resolves.toBeDefined();
      tx.apiaryRestriction.findUnique.mockResolvedValue({
        ...stored,
        endsOn: day('2026-10-20'),
      });
      await expect(
        service.update('r1', { startsOn: '2026-11-01' }, 'user-1'),
      ).rejects.toMatchObject({ status: 400 });
      expect(tx.apiaryRestriction.update).toHaveBeenCalledTimes(1);
    });

    it('answers 404 for an unknown restriction without locking', async () => {
      prisma.apiaryRestriction.findUnique.mockResolvedValue(null);

      await expect(
        service.update('missing', { notes: 'x' }, 'user-1'),
      ).rejects.toMatchObject({ status: 404 });
      expect(tx.$queryRaw).not.toHaveBeenCalled();
    });
  });

  describe('reads', () => {
    it('findActive lists only restrictions active today, with the apiary name', async () => {
      prisma.apiaryRestriction.findMany.mockResolvedValue([
        {
          id: 'r1',
          apiaryId: 'a1',
          apiary: { name: 'Nord' },
          disease: 'Faulbrut',
          startsOn: day('2000-01-01'),
          endsOn: null,
        },
        {
          id: 'r2',
          apiaryId: 'a2',
          apiary: { name: 'Sued' },
          disease: 'Faulbrut',
          startsOn: day('2000-01-01'),
          endsOn: day('2000-01-02'),
        },
      ]);

      await expect(service.findActive()).resolves.toEqual([
        {
          id: 'r1',
          apiaryId: 'a1',
          apiaryName: 'Nord',
          disease: 'Faulbrut',
          startsOn: '2000-01-01',
        },
      ]);
    });

    it('without compliance:read the lists carry no authority, reference, notes or creator', async () => {
      const row = {
        id: 'r1',
        apiaryId: 'a1',
        disease: 'Faulbrut',
        authority: 'Veterinaeramt',
        reference: 'AZ 12/3',
        notes: 'intern',
        createdByUserId: 'u1',
        startsOn: day('2026-10-01'),
        endsOn: null,
      };
      prisma.apiaryRestriction.findMany.mockResolvedValue([row]);
      prisma.apiary.findUnique.mockResolvedValue({ id: 'a1' });
      const expected = [
        {
          id: 'r1',
          apiaryId: 'a1',
          disease: 'Faulbrut',
          startsOn: '2026-10-01',
          endsOn: null,
        },
      ];

      await expect(service.list(undefined, false)).resolves.toEqual(expected);
      await expect(service.findForApiary('a1', false)).resolves.toEqual(
        expected,
      );
      await expect(service.list(undefined, true)).resolves.toEqual([row]);
    });

    it('findForApiary answers 404 for an unknown apiary', async () => {
      prisma.apiary.findUnique.mockResolvedValue(null);

      await expect(service.findForApiary('missing')).rejects.toMatchObject({
        status: 404,
      });
    });
  });
});