import { describe, it, expect, vi, beforeEach } from 'vitest';

vi.mock('@/lib/admin/auth', () => ({
  isAdminEnabled: vi.fn(() => true),
  isAdminAuthenticated: vi.fn(async () => true),
  COOKIE_NAME: 'folio_admin_session',
}));

vi.mock('@/lib/admin/yaml-service', () => ({
  readSettingsYaml: vi.fn(async () => ({})),
  writeSettingsYaml: vi.fn(async () => undefined),
}));

vi.mock('@/lib/config', () => ({
  invalidateConfigCache: vi.fn(),
  getConfigOrNull: vi.fn(() => null),
}));

vi.mock('@/lib/immich', () => ({
  immich: { invalidateAll: vi.fn() },
}));

vi.mock('next/cache', () => ({ revalidatePath: vi.fn() }));

import { writeSettingsYaml } from '@/lib/admin/yaml-service';
import { PUT } from '../settings/route';

const put = (settings: unknown) =>
  PUT(
    new Request('http://localhost/api/admin/settings', {
      method: 'PUT',
      body: JSON.stringify({ settings }),
    }),
  );

/**
 * The point of the check is not that a bad payload is reported — it is that
 * nothing is written. settings.yaml is read by every public page, so a
 * malformed save is discovered by visitors rather than by the person who made
 * it (#599).
 */
describe('PUT /api/admin/settings', () => {
  beforeEach(() => vi.clearAllMocks());

  it('writes a valid payload', async () => {
    const res = await put({ title: 'Folio', theme: 'minimal' });

    expect(res.status).toBe(200);
    expect(writeSettingsYaml).toHaveBeenCalledOnce();
  });

  it('leaves the file untouched when the payload is malformed', async () => {
    const res = await put({ title: { de: 'Folio' }, grid: 3 });

    expect(res.status).toBe(400);
    expect(writeSettingsYaml).not.toHaveBeenCalled();
  });

  it('answers with the offending fields, so the panel can point at them', async () => {
    const res = await put({ title: 1, theme: { fonts: { heading: 42 } } });
    const body = await res.json();

    expect(body.fields.map((f: { field: string }) => f.field).sort()).toEqual([
      'theme.fonts.heading',
      'title',
    ]);
  });

  it('still writes settings carrying keys this version does not know', async () => {
    // Older and newer configs are both in the wild, and there is no
    // schemaVersion to tell them apart.
    const res = await put({ title: 'Folio', fromALaterRelease: { nested: true } });

    expect(res.status).toBe(200);
    expect(writeSettingsYaml).toHaveBeenCalledOnce();
  });
});

/** The panel sends the site password as typed; the file must not keep it that way (#690). */
describe('PUT /api/admin/settings — site password', () => {
  beforeEach(() => vi.clearAllMocks());

  it('writes the site password as an scrypt hash', async () => {
    const res = await put({ title: 'Folio', sitePassword: 'letmein' });
    expect(res.status).toBe(200);

    const written = vi.mocked(writeSettingsYaml).mock.calls[0][0] as { sitePassword: string };
    expect(written.sitePassword).toMatch(/^scrypt:/);
    expect(JSON.stringify(written)).not.toContain('letmein');
  });

  it('leaves an open site open', async () => {
    await put({ title: 'Folio', sitePassword: '' });
    const written = vi.mocked(writeSettingsYaml).mock.calls[0][0] as { sitePassword: string };
    expect(written.sitePassword).toBe('');
  });
});

/**
 * Values the site would ignore used to be written with a success message: the
 * accent fell back to the preset, the columns were clamped, the sitemap went
 * out without an address (QA A-14).
 */
describe('PUT /api/admin/settings — values the site would ignore', () => {
  beforeEach(() => vi.clearAllMocks());

  it('refuses them, names each field, and writes nothing', async () => {
    const res = await put({
      url: 'folio.example',
      theme: { preset: 'minimal', accent: 'rot' },
      grid: { columns: 9, gap: 12 },
    });
    const body = await res.json();

    expect(res.status).toBe(400);
    expect(writeSettingsYaml).not.toHaveBeenCalled();
    expect(body.fields.map((f: { field: string }) => f.field).sort()).toEqual([
      'grid.columns',
      'theme.accent',
      'url',
    ]);
    expect(body.fields.every((f: { message: string }) => f.message.length > 0)).toBe(true);
  });

  it('writes the same fields once they hold values the site uses', async () => {
    const res = await put({
      url: 'https://folio.example',
      theme: { preset: 'minimal', accent: '#e60012' },
      grid: { columns: 6, gap: 0 },
    });

    expect(res.status).toBe(200);
    expect(writeSettingsYaml).toHaveBeenCalledOnce();
  });
});