import { TestBed } from '@angular/core/testing';
import { describe, it, expect, vi } from 'vitest';
import { SUBMIT_FAILED } from '@shared/application/submit';
import { ApplicationsAdapter } from '@registratie/infrastructure/applications.adapter';
import { ApplicationsStore } from './applications.store';

const summary = (id: string) => ({
  id,
  type: 'registratie',
  status: { tag: 'Concept', stepIndex: 0, stepCount: 3 },
  documentIds: [],
  createdAt: '2026-07-23T10:00:00Z',
  updatedAt: '2026-07-23T10:00:00Z',
});

function setup(adapter: Partial<ApplicationsAdapter>): ApplicationsStore {
  TestBed.configureTestingModule({
    providers: [{ provide: ApplicationsAdapter, useValue: adapter }],
  });
  // The store's own constructor kicks off `load()` (dashboard revisit refresh) —
  // give every test a `list` so that initial call has something to resolve.
  return TestBed.inject(ApplicationsStore);
}

describe('ApplicationsStore', () => {
  it('loads and parses the list', async () => {
    const store = setup({ list: () => Promise.resolve([summary('a'), summary('b')]) });
    await store.load();
    const s = store.applications();
    expect(s.tag).toBe('Success');
    expect(s.tag === 'Success' && s.value.map((a) => a.id)).toEqual(['a', 'b']);
  });

  it('cancels optimistically and confirms via the DELETE endpoint', async () => {
    const cancel = vi.fn().mockResolvedValue(undefined);
    const store = setup({
      list: () => Promise.resolve([summary('a'), summary('b')]),
      cancel,
    });
    await store.load();

    await store.cancel('a');
    expect(cancel).toHaveBeenCalledWith('a');
    const s = store.applications();
    expect(s.tag === 'Success' && s.value.map((a) => a.id)).toEqual(['b']);
    expect(store.lastError()).toBeNull();
  });

  // RB-20: a failed cancel must not be silent — the row rolls back AND the store
  // surfaces the error the page renders. Before RB-20 this only rolled back
  // (bare `catch { this.state.set(before) }`), so `lastError()` stayed null forever.
  it('rolls back the removal and surfaces the error when the cancel fails', async () => {
    const cancel = vi.fn().mockRejectedValue(new Error('boom'));
    const store = setup({ list: () => Promise.resolve([summary('a')]), cancel });
    await store.load();

    await store.cancel('a');
    const s = store.applications();
    expect(s.tag === 'Success' && s.value.map((a) => a.id)).toEqual(['a']); // reappears
    expect(store.lastError()).toBe(SUBMIT_FAILED);
  });

  it('clears a stale error on the next cancel attempt', async () => {
    const cancel = vi
      .fn()
      .mockRejectedValueOnce(new Error('boom'))
      .mockResolvedValueOnce(undefined);
    const store = setup({ list: () => Promise.resolve([summary('a'), summary('b')]), cancel });
    await store.load();

    await store.cancel('a');
    expect(store.lastError()).toBe(SUBMIT_FAILED);

    await store.cancel('b');
    expect(store.lastError()).toBeNull();
  });
});