import { test, expect, uniqueSuffix, findOrFail } from './fixtures';

// Each test leaves the templates as it found them, because they are stored in
// admin_settings and would otherwise change the copy a later test reads.
async function restore(request: import('@playwright/test').APIRequestContext, key: string) {
  await request.delete(`/api/admin/email-templates/${key}`);
}

// Serial: these edit one shared stored template, and the suite runs fully
// parallel by default — so run concurrently they would race, one asserting a
// template is unset while another has just saved it.
test.describe.configure({ mode: 'serial' });

test.describe('Editing the customer emails', () => {
  test.afterEach(async ({ page, admin, adminEmails }) => {
    await restore(page.request, 'passwordReset');
  });

  test('offers every template as a tab, marked default until it is edited', async ({ page, admin, adminEmails }) => {
    await admin.open('Emails');

    for (const label of [
      'Email verification',
      'Password reset',
      'Favorited item sold',
      'Favorited item withdrawn',
      'Cart reminder',
      'Email address changed',
      // Added in #337, and the reason these are matched on the whole
      // accessible name rather than as substrings: it extends the label above
      // it, so an unanchored match resolved to both tabs.
      'Email address changed by the shop'
    ]) {
      await expect(adminEmails.railTab(label)).toBeVisible();
    }

    // Only a customised template is marked, so which ones have been changed is
    // visible without opening each one. An untouched template carries nothing.
    await expect(adminEmails.railTab('Password reset')).toBeVisible();
    await expect(adminEmails.customisedTab('Password reset')).toHaveCount(0);
  });

  test('saves a replacement subject and body', async ({ page, admin, adminEmails }) => {
    const subject = `Reset ${uniqueSuffix()}`;
    await admin.open('Emails');
    await adminEmails.openTemplate('Password reset');

    await adminEmails.subject('Password reset').fill(subject);
    await page
      .getByLabel('Password reset body')
      .fill('Fresh wording. [Choose a new password]({{resetUrl}}).');
    await adminEmails.saveButton.click();

    await expect(page.getByText('Password reset saved')).toBeVisible();

    // Persisted, not merely accepted by the form.
    const stored: { key: string; subject: string | null; body: string | null }[] = await (
      await page.request.get('/api/admin/email-templates')
    ).json();
    const reset = findOrFail(
      stored,
      (t) => t.key === 'passwordReset',
      'the passwordReset template'
    );
    expect(reset.subject).toBe(subject);
  });

  // The assertion that matters. A body without its link still sends and still
  // looks fine in the log, so the save has to be refused rather than warned
  // about — and the admin has to be told which placeholder is missing.
  test('refuses a body that drops the required placeholder, and says which', async ({ page, admin, adminEmails }) => {
    await admin.open('Emails');
    await adminEmails.openTemplate('Password reset');

    await adminEmails.body('Password reset').fill('Just click the thing in your email.');
    await adminEmails.saveButton.click();

    await expect(page.getByText('the body must keep {{resetUrl}}')).toBeVisible();

    // And nothing was stored.
    const stored: { key: string; subject: string | null; body: string | null }[] = await (
      await page.request.get('/api/admin/email-templates')
    ).json();
    const reset = findOrFail(
      stored,
      (t) => t.key === 'passwordReset',
      'the passwordReset template'
    );
    expect(reset.body).toBeNull();
  });

  test('restores the built-in copy', async ({ page, admin, adminEmails }) => {
    await page.request.put('/api/admin/email-templates/passwordReset', {
      data: { subject: 'Temporary', body: 'Temporary [link]({{resetUrl}}).' }
    });

    await admin.open('Emails');
    // Marked in the rail before it is opened, which is the whole point of the
    // dot — the stored template above was never touched through the UI.
    await expect(adminEmails.customisedTab('Password reset')).toBeVisible();
    await adminEmails.openTemplate('Password reset');
    await adminEmails.restoreDefaultButton.click();

    await expect(page.getByText('Password reset restored to the default')).toBeVisible();

    const stored: { key: string; subject: string | null; body: string | null }[] = await (
      await page.request.get('/api/admin/email-templates')
    ).json();
    const reset = findOrFail(
      stored,
      (t) => t.key === 'passwordReset',
      'the passwordReset template'
    );
    expect(reset.subject).toBeNull();
    expect(reset.body).toBeNull();
  });
});

test.describe('Previewing the customer emails', () => {
  test.afterEach(async ({ page, admin, adminEmails }) => {
    await restore(page.request, 'passwordReset');
  });

  test('shows the draft being edited, not the stored copy', async ({ page, admin, adminEmails }) => {
    const wording = `Wording ${uniqueSuffix()}`;
    await admin.open('Emails');
    await adminEmails.openTemplate('Password reset');

    await page
      .getByLabel('Password reset body')
      .fill(`${wording}. [Choose a new password]({{resetUrl}}).`);

    // Nothing has been saved. The preview still reflects it, which is the whole
    // point: an admin sees the effect before committing to it.
    await expect(adminEmails.preview('Password reset').getByText(wording)).toBeVisible();

    const stored: { key: string; subject: string | null; body: string | null }[] = await (
      await page.request.get('/api/admin/email-templates')
    ).json();
    expect(findOrFail(
      stored,
      (t) => t.key === 'passwordReset',
      'the passwordReset template'
    ).body).toBeNull();
  });

  test('substitutes sample values rather than showing raw placeholders', async ({ page, admin, adminEmails }) => {
    await admin.open('Emails');
    await adminEmails.openTemplate('Password reset');

    const frame = adminEmails.preview('Password reset');
    await expect(frame.getByRole('link')).toHaveAttribute('href', /reset-password\?token=/);
    await expect(frame.locator('body')).not.toContainText('{{resetUrl}}');
  });

  // The control that stops an admin putting script into a customer's inbox is
  // markdown-it's html: false on the server. The preview has to show the same
  // thing the mailer emits, or it would be reassuring about the wrong output.
  test('escapes raw HTML exactly as the mailer does', async ({ page, admin, adminEmails }) => {
    await admin.open('Emails');
    await adminEmails.openTemplate('Password reset');

    await page
      .getByLabel('Password reset body')
      .fill('<script>alert(1)</script> [link]({{resetUrl}})');

    await expect(adminEmails.preview('Password reset').getByText('<script>alert(1)</script>')).toBeVisible();
  });

  // Appended by the server and not editable, so it has to appear in the preview
  // of the two templates it belongs to and nowhere else.
  test('includes the consent footer on a favorite template, and not on others', async ({ page, admin, adminEmails }) => {
    await admin.open('Emails');

    await adminEmails.openTemplate('Favorited item sold');
    await expect(adminEmails.preview('Favorited item sold').getByText(/account page/)).toBeVisible();

    await adminEmails.openTemplate('Password reset');
    await expect(adminEmails.preview('Password reset').locator('body')).not.toContainText('account page');
  });
});