import { describe, it, expect } from 'vitest';
import { expectTag } from '@shared/testing/expect-tag';
import { BesluitState, reduce, initial } from './besluit.machine';

const editingWith = (besluit: string, toelichting = ''): BesluitState => ({
  tag: 'Editing',
  draft: { besluit, toelichting },
  errors: {},
});

describe('besluit reduce', () => {
  it('SetField updates the draft while editing', () => {
    const s = reduce(initial, { tag: 'SetField', key: 'besluit', value: 'Goedkeuren' });
    expect(expectTag(s, 'Editing').draft.besluit).toBe('Goedkeuren');
  });

  it('Submit with no besluit chosen stays Editing and reports a field error', () => {
    const s = reduce(editingWith(''), { tag: 'Submit' });
    expect(expectTag(s, 'Editing').errors.besluit).toBeTruthy();
  });

  it('Submit Afwijzen without a toelichting stays Editing and reports a field error', () => {
    const s = reduce(editingWith('Afwijzen'), { tag: 'Submit' });
    expect(expectTag(s, 'Editing').errors.toelichting).toBeTruthy();
  });

  it('Submit Goedkeuren with no toelichting moves to Submitting (optional there)', () => {
    const s = reduce(editingWith('Goedkeuren'), { tag: 'Submit' });
    expect(expectTag(s, 'Submitting').data).toEqual({
      besluit: 'Goedkeuren',
      toelichting: undefined,
    });
  });

  it('Submit Afwijzen with a toelichting moves to Submitting with the trimmed value', () => {
    const s = reduce(editingWith('Afwijzen', '  niet erkend  '), { tag: 'Submit' });
    expect(expectTag(s, 'Submitting').data).toEqual({
      besluit: 'Afwijzen',
      toelichting: 'niet erkend',
    });
  });

  it('SubmitConfirmed maps Submitting to Submitted', () => {
    const submitting = reduce(editingWith('Goedkeuren'), { tag: 'Submit' });
    expect(reduce(submitting, { tag: 'SubmitConfirmed' }).tag).toBe('Submitted');
  });

  it('SubmitFailed maps Submitting to Failed with the error', () => {
    const submitting = reduce(editingWith('Goedkeuren'), { tag: 'Submit' });
    const failed = reduce(submitting, { tag: 'SubmitFailed', error: 'boom' });
    expect(failed).toMatchObject({ tag: 'Failed', error: 'boom' });
  });

  it('Retry re-submits a failure', () => {
    const submitting = reduce(editingWith('Goedkeuren'), { tag: 'Submit' });
    const failed = reduce(submitting, { tag: 'SubmitFailed', error: 'boom' });
    expect(reduce(failed, { tag: 'Retry' }).tag).toBe('Submitting');
  });

  it('Reset returns to the initial editing state', () => {
    const submitting = reduce(editingWith('Goedkeuren'), { tag: 'Submit' });
    expect(reduce(submitting, { tag: 'Reset' })).toEqual(initial);
  });
});