/**
 * timezone-verify.spec.ts — 18-04 round-trip verification
 *
 * Verifies the admin Timezone section with the real 18-02 API endpoints.
 * Runs on desktop profile only (admin UI is desktop-focused).
 *
 * NOTE: the IANA picker input is type="text" with list="iana-zones" which gives
 * it the ARIA combobox role (not textbox) in Chromium.
 */
import { test, expect } from '@playwright/test';

test.describe('Admin Timezone section — 18-04 round-trip', () => {
  test.beforeEach(async ({ page }) => {
    await page.goto('/admin');
    await expect(page.getByRole('heading', { name: 'Admin Settings' })).toBeVisible();
    // Wait for the Timezone section to load (requires the 18-02 GET endpoint)
    const tzSection = page.getByRole('region', { name: 'Timezone' });
    await expect(tzSection).toBeVisible({ timeout: 15_000 });
  });

  test('Timezone section is visible on /admin', async ({ page }) => {
    await expect(page.getByRole('region', { name: 'Timezone' })).toBeVisible();
  });

  test('Timezone input (combobox) is visible and pre-filled', async ({ page }) => {
    // ARIA role for <input type="text" list="iana-zones"> is combobox
    const input = page.getByRole('combobox', { name: 'Household timezone' });
    await expect(input).toBeVisible();
    const val = await input.inputValue();
    expect(val.length, 'Input should have a non-empty timezone').toBeGreaterThan(0);
  });

  test('Save button is disabled when timezone is unchanged', async ({ page }) => {
    const tzSection = page.getByRole('region', { name: 'Timezone' });
    const saveBtn = tzSection.getByRole('button', { name: /Save|Saving/ });
    await expect(saveBtn).toBeVisible();
    await expect(saveBtn).toBeDisabled();
  });

  test('Changing the input enables Save', async ({ page }) => {
    const tzSection = page.getByRole('region', { name: 'Timezone' });
    const input = page.getByRole('combobox', { name: 'Household timezone' });
    await input.fill('America/Chicago');
    const saveBtn = tzSection.getByRole('button', { name: /Save/ });
    await expect(saveBtn).toBeEnabled();
  });

  test('Save persists timezone across reload', async ({ page }) => {
    const input = page.getByRole('combobox', { name: 'Household timezone' });
    const tzSection = page.getByRole('region', { name: 'Timezone' });

    // Set to a known value
    await input.fill('America/Chicago');
    const saveBtn = tzSection.getByRole('button', { name: /^Save$/ });
    await expect(saveBtn).toBeEnabled();
    await saveBtn.click();
    // Wait for save to complete (button re-disables when stored === input)
    await expect(saveBtn).toBeDisabled({ timeout: 15_000 });

    // Reload and verify persistence
    await page.reload();
    await expect(page.getByRole('heading', { name: 'Admin Settings' })).toBeVisible();
    await expect(tzSection).toBeVisible({ timeout: 15_000 });
    const inputAfterReload = page.getByRole('combobox', { name: 'Household timezone' });
    await expect(inputAfterReload).toHaveValue('America/Chicago');

    // system-default note should be gone after explicit set
    await expect(tzSection.getByText('Using system default')).toHaveCount(0);
  });

  test('"Use detected" affordance sets input to browser zone', async ({ page }) => {
    const tzSection = page.getByRole('region', { name: 'Timezone' });
    const detectedBtn = tzSection.getByRole('button', { name: /Use detected:/ });

    // The button is only visible when detected TZ != stored TZ
    const count = await detectedBtn.count();
    if (count === 0) {
      test.skip();
      return;
    }

    // Get the detected zone from the button label
    const btnText = await detectedBtn.textContent();
    const match = btnText?.match(/Use detected:\s*(.+)/);
    const detectedZone = match?.[1]?.trim();
    expect(detectedZone, 'Detected zone should be non-empty').toBeTruthy();

    await detectedBtn.click();
    const input = page.getByRole('combobox', { name: 'Household timezone' });
    await expect(input).toHaveValue(detectedZone!);
  });
});