import { ForbiddenException } from '@nestjs/common';

import { YardScopeService } from './yard-scope.service';

/**
 * The resolver answers "which yards", never "may they act at all" — that stays
 * with the permission guard. So a mapped desk is narrowed to its yards, and an
 * unmapped one keeps the reach its permissions already gave it.
 */
describe('YardScopeService', () => {
  const yardIdsForPositions = jest.fn();
  const service = () =>
    new YardScopeService({ yardIdsForPositions } as never);

  const staff = (positionId: string, permissions: string[] = []) => ({
    roles: [{ key: 'staff' }],
    permissions: permissions.map((key) => ({ key })),
    employee: { position: { id: positionId, permissions: [] } },
  });

  beforeEach(() => {
    jest.clearAllMocks();
    delete process.env.YARD_SCOPE_ENFORCE;
  });

  it('resolves a mapped position to its yards', async () => {
    yardIdsForPositions.mockResolvedValue(['yard-kality', 'yard-mojo']);

    const scope = await service().getScopedYardIds(staff('pos-officer'));

    expect(scope).toEqual(['yard-kality', 'yard-mojo']);
    expect(yardIdsForPositions).toHaveBeenCalledWith(['pos-officer']);
  });

  it('leaves an unmapped position unrestricted — permissions still gate the action', async () => {
    yardIdsForPositions.mockResolvedValue([]);

    expect(await service().getScopedYardIds(staff('pos-unmapped'))).toBeNull();
  });

  it('leaves a caller with no resolvable position unrestricted', async () => {
    const noPosition = { roles: [{ key: 'staff' }], employee: { position: {} } };

    expect(await service().getScopedYardIds(noPosition)).toBeNull();
    expect(yardIdsForPositions).not.toHaveBeenCalled();
  });

  it('narrows nothing for an anonymous caller but grants nothing either', async () => {
    expect(await service().getScopedYardIds(null)).toEqual([]);
  });

  it('returns unrestricted only for super admins and view_all holders', async () => {
    const superAdmin = { roles: [{ key: 'super_admin' }] };
    const hqDesk = staff('pos-occ', ['edr_freight_app:yards:view_all']);

    expect(await service().getScopedYardIds(superAdmin)).toBeNull();
    expect(await service().getScopedYardIds(hqDesk)).toBeNull();
    expect(yardIdsForPositions).not.toHaveBeenCalled();
  });

  it('includes delegated positions — standing in must not lose the yard', async () => {
    yardIdsForPositions.mockResolvedValue(['yard-kality']);

    await service().getScopedYardIds({
      roles: [{ key: 'staff' }],
      employee: {
        position: { id: 'pos-own' },
        delegatedPositions: [{ id: 'pos-gelan-director' }],
      },
    });

    expect(yardIdsForPositions).toHaveBeenCalledWith([
      'pos-own',
      'pos-gelan-director',
    ]);
  });

  describe('listFilterYardIds', () => {
    it('narrows nothing while shadow-logging', async () => {
      yardIdsForPositions.mockResolvedValue(['yard-kality']);

      expect(
        await service().listFilterYardIds(staff('pos-officer'), undefined, 'list'),
      ).toBeNull();
    });

    it('narrows to the mapped yards once enforcing', async () => {
      process.env.YARD_SCOPE_ENFORCE = 'true';
      yardIdsForPositions.mockResolvedValue(['yard-kality', 'yard-mojo']);

      expect(
        await service().listFilterYardIds(staff('pos-officer'), undefined, 'list'),
      ).toEqual(['yard-kality', 'yard-mojo']);
    });

    it('keeps an in-scope yard filter as the caller asked', async () => {
      process.env.YARD_SCOPE_ENFORCE = 'true';
      yardIdsForPositions.mockResolvedValue(['yard-kality', 'yard-mojo']);

      expect(
        await service().listFilterYardIds(staff('pos-officer'), 'yard-mojo', 'list'),
      ).toEqual(['yard-mojo']);
    });

    it('returns an empty set — not everything — for an out-of-scope yard filter', async () => {
      process.env.YARD_SCOPE_ENFORCE = 'true';
      yardIdsForPositions.mockResolvedValue(['yard-kality']);

      expect(
        await service().listFilterYardIds(staff('pos-officer'), 'yard-djibouti', 'list'),
      ).toEqual([]);
    });

    it('never narrows an unmapped desk', async () => {
      process.env.YARD_SCOPE_ENFORCE = 'true';
      yardIdsForPositions.mockResolvedValue([]);

      expect(
        await service().listFilterYardIds(staff('pos-unmapped'), undefined, 'list'),
      ).toBeNull();
    });
  });

  it('only logs an out-of-scope yard until YARD_SCOPE_ENFORCE is set', async () => {
    yardIdsForPositions.mockResolvedValue(['yard-kality']);
    const shadow = service();

    await expect(
      shadow.assertYardInScope(staff('pos-officer'), 'yard-mojo', 'test'),
    ).resolves.toBeUndefined();

    process.env.YARD_SCOPE_ENFORCE = 'true';
    const enforcing = service();

    await expect(
      enforcing.assertYardInScope(staff('pos-officer'), 'yard-mojo', 'test'),
    ).rejects.toBeInstanceOf(ForbiddenException);
  });
});