// Error page route helpers and error copy selection.

const { renderView } = require('#src/web/view');
const { PERMISSION_DENIED_MESSAGE } = require('#src/rbac');

function getErrorCopy(statusCode, message) {
  const normalizedStatusCode = Number(statusCode) || 500;

  if (normalizedStatusCode === 403) {
    return {
      title: 'Access denied',
      errorTitle: 'Access denied',
      errorMessage: message || PERMISSION_DENIED_MESSAGE,
      backLabel: 'Back to dashboard'
    };
  }

  if (normalizedStatusCode === 404) {
    return {
      title: 'Not found',
      errorTitle: 'Oops! Page not found.',
      errorMessage: message || 'We could not find the page you were looking for. Meanwhile, you may return to the dashboard or try searching for what you need.',
      backLabel: 'Back to dashboard'
    };
  }

  if (normalizedStatusCode >= 500) {
    return {
      title: 'Something went wrong',
      errorTitle: 'Something went wrong.',
      errorMessage: message || 'An unexpected error occurred. Please try again in a moment.',
      backLabel: 'Back to dashboard'
    };
  }

  return {
    title: 'Error',
    errorTitle: 'Error',
    errorMessage: message || 'An unexpected error occurred.',
    backLabel: 'Back to dashboard'
  };
}

module.exports = function renderErrorPage(options, currentUser) {
  const errorOptions = options || {};
  const statusCode = Number(errorOptions.statusCode || 500);
  const copy = getErrorCopy(statusCode, String(errorOptions.message || '').trim());
  return renderView('error/error', {
    title: String(errorOptions.title || copy.title || 'Error').trim(),
    active: '',
    messageVariant: statusCode === 403 ? 'warning' : 'primary',
    currentUser: currentUser || null,
    statusCode: statusCode,
    errorTitle: String(errorOptions.errorTitle || copy.errorTitle || errorOptions.title || 'Error').trim(),
    errorMessage: String(errorOptions.message || copy.errorMessage || 'An unexpected error occurred.').trim(),
    detail: String(errorOptions.detail || '').trim(),
    backUrl: String(errorOptions.backUrl || '/dashboard').trim() || '/dashboard',
    backLabel: String(errorOptions.backLabel || copy.backLabel || 'Back to dashboard').trim() || 'Back to dashboard',
    searchUrl: String(errorOptions.searchUrl || '').trim(),
    bodyClass: 'error-page bg-dark text-white',
    errorShell: true,
    stylesheets: [],
    scripts: []
  });
};