import { Page } from '@playwright/test';

// Test credentials - FakeAuthService accepts any credentials in development mode
const DEFAULT_USERNAME = 'testuser';
const DEFAULT_PASSWORD = 'testpass';

/**
 * Login to the application using FakeAuthService credentials
 * @param page - Playwright page object
 * @param username - Optional username (defaults to testuser)
 * @param password - Optional password (defaults to testpass)
 */
export async function login(page: Page, username?: string, password?: string): Promise<void> {
  const user = username ?? DEFAULT_USERNAME;
  const pass = password ?? DEFAULT_PASSWORD;

  // Check if we're on the login page
  const loginForm = page.locator('text=Authentication Required');
  if (await loginForm.isVisible({ timeout: 5000 }).catch(() => false)) {
    // Wait for form inputs to be ready
    await page.locator('input[name="Username"]').waitFor({ state: 'visible', timeout: 10000 });

    // Fill credentials
    await page.locator('input[name="Username"]').fill(user);
    await page.locator('input[name="Password"]').fill(pass);

    // Click the submit button
    await page.locator('button[type="submit"]:has-text("LOGIN")').click();

    // Wait for login to process
    await page.waitForTimeout(3000);

    // After login, force navigation to refresh state
    await page.goto('/search');
    await page.waitForLoadState('networkidle', { timeout: 60000 });

    // Verify login succeeded
    if (await loginForm.isVisible({ timeout: 2000 }).catch(() => false)) {
      throw new Error('Login failed - still on login page after attempt');
    }
  }
}

/**
 * Logout from the application
 * @param page - Playwright page object
 */
export async function logout(page: Page): Promise<void> {
  // Click the logout button in the header
  const logoutButton = page.locator('button:has-text("Logout")');
  if (await logoutButton.isVisible({ timeout: 2000 }).catch(() => false)) {
    await logoutButton.click();
    await page.waitForLoadState('networkidle', { timeout: 30000 });
  }
}

/**
 * Check if the user is currently logged in
 * @param page - Playwright page object
 * @returns true if logged in, false otherwise
 */
export async function isLoggedIn(page: Page): Promise<boolean> {
  const loginForm = page.locator('text=Authentication Required');
  const logoutButton = page.locator('button:has-text("Logout")');

  // If logout button is visible, user is logged in
  if (await logoutButton.isVisible({ timeout: 2000 }).catch(() => false)) {
    return true;
  }

  // If login form is visible, user is not logged in
  if (await loginForm.isVisible({ timeout: 2000 }).catch(() => false)) {
    return false;
  }

  // Default to not logged in
  return false;
}

/**
 * Ensure user is logged in, performing login if necessary
 * @param page - Playwright page object
 */
export async function ensureLoggedIn(page: Page): Promise<void> {
  if (!(await isLoggedIn(page))) {
    await login(page);
  }
}