import { buildMaintenanceNotes, formatTrainRunLabel } from './train-builder.service';

describe('formatTrainRunLabel', () => {
  it('names the train by its export and import run numbers', () => {
    // What staff actually recognise — NOT the internal code (TRN-LEDGER-PW2).
    expect(
      formatTrainRunLabel({
        exportTrainNumber: '9201',
        importTrainNumber: '9202',
        trainNumber: 'TRN-7',
        code: 'TRN-LEDGER-PW2',
      }),
    ).toBe('export 9201 / import 9202');
  });

  it('shows only the run number that is set', () => {
    expect(
      formatTrainRunLabel({ exportTrainNumber: '9201', code: 'TRN-LEDGER-PW2' }),
    ).toBe('export 9201');
    expect(
      formatTrainRunLabel({ importTrainNumber: '9202', code: 'TRN-LEDGER-PW2' }),
    ).toBe('import 9202');
  });

  it('falls back to the train number, then the code, when no run is set', () => {
    expect(formatTrainRunLabel({ trainNumber: 'TRN-7', code: 'TRN-LEDGER-PW2' })).toBe(
      'TRN-7',
    );
    expect(formatTrainRunLabel({ code: 'TRN-LEDGER-PW2' })).toBe('TRN-LEDGER-PW2');
  });

  it('ignores blank run numbers rather than printing empty labels', () => {
    expect(
      formatTrainRunLabel({ exportTrainNumber: '  ', importTrainNumber: null, code: 'C-1' }),
    ).toBe('C-1');
  });

  it('never returns an empty label', () => {
    expect(formatTrainRunLabel({})).toBe('unknown');
  });
});

describe('buildMaintenanceNotes', () => {
  it('records the operator reason together with the train it came off', () => {
    const notes = buildMaintenanceNotes('export 9201 / import 9202', 'Brake shoe worn through');

    expect(notes.statusLogNote).toBe(
      'Brake shoe worn through (detached from train export 9201 / import 9202)',
    );
    expect(notes.movementNote).toBe(
      'Sent to maintenance from train export 9201 / import 9202: Brake shoe worn through',
    );
  });

  it('still records the train number when no reason is given', () => {
    // The reason is optional, but which train a wagon left is never optional —
    // the history has to answer that on its own.
    const notes = buildMaintenanceNotes('export 9201 / import 9202');

    expect(notes.statusLogNote).toBe('Detached from train export 9201 / import 9202');
    expect(notes.movementNote).toBe('Sent to maintenance from train export 9201 / import 9202');
  });

  it('treats a whitespace-only reason as no reason', () => {
    const notes = buildMaintenanceNotes('export 9201 / import 9202', '   ');

    expect(notes.statusLogNote).toBe('Detached from train export 9201 / import 9202');
    expect(notes.movementNote).toBe('Sent to maintenance from train export 9201 / import 9202');
  });

  it('trims padding around a real reason', () => {
    const notes = buildMaintenanceNotes('export 9201 / import 9202', '  Coupler damage  ');

    expect(notes.statusLogNote).toBe('Coupler damage (detached from train export 9201 / import 9202)');
    expect(notes.movementNote).toBe('Sent to maintenance from train export 9201 / import 9202: Coupler damage');
  });

  it('handles a null reason from an older client', () => {
    expect(buildMaintenanceNotes('export 9201 / import 9202', null).statusLogNote).toBe(
      'Detached from train export 9201 / import 9202',
    );
  });
});