const Form = require('../models/Form');

const BUILTIN_FEEDBACK_FORM_NAME = 'Give us your feedback';
const BUILTIN_RATINGS_FORM_NAME = 'Rate us';

/** @deprecated Renamed; kept for lookup/migration of existing documents */
const LEGACY_BUILTIN_FEEDBACK_FORM_NAME = 'EventBuzz Default Feedback';
const LEGACY_BUILTIN_RATINGS_FORM_NAME = 'EventBuzz Default Ratings';

const ALL_BUILTIN_FEEDBACK_NAMES = [BUILTIN_FEEDBACK_FORM_NAME, LEGACY_BUILTIN_FEEDBACK_FORM_NAME];
const ALL_BUILTIN_RATINGS_NAMES = [BUILTIN_RATINGS_FORM_NAME, LEGACY_BUILTIN_RATINGS_FORM_NAME];

const DEFAULT_FEEDBACK_FIELDS = [
  {
    label: 'Your feedback',
    type: 'text',
    required: true,
    placeholder: 'Share your experience, suggestions, or issues…',
    options: [],
  },
];

const DEFAULT_RATINGS_FIELDS = [
  {
    label: 'How will you rate the speakers?',
    type: 'stars',
    required: true,
    options: [],
  },
  {
    label: 'How will you rate the quality of content?',
    type: 'stars',
    required: true,
    options: [],
  },
  {
    label: 'Probability to recommend to your friends and colleagues',
    type: 'stars',
    required: true,
    options: [],
  },
];

function isBuiltinVisitorFormName(name) {
  const n = name != null ? String(name).trim() : '';
  return [...ALL_BUILTIN_FEEDBACK_NAMES, ...ALL_BUILTIN_RATINGS_NAMES].includes(n);
}

/**
 * EventBuzz built-in feedback/ratings forms (created per event on first use).
 * Session `audienceFeedbackForm` / `audienceRatingsForm` null = use these, not custom portfolio forms.
 */
async function ensureBuiltinVisitorForm(event, purpose = 'feedback') {
  const isRatings = purpose === 'ratings';
  const name = isRatings ? BUILTIN_RATINGS_FORM_NAME : BUILTIN_FEEDBACK_FORM_NAME;
  const lookupNames = isRatings ? ALL_BUILTIN_RATINGS_NAMES : ALL_BUILTIN_FEEDBACK_NAMES;
  const fields = isRatings ? DEFAULT_RATINGS_FIELDS : DEFAULT_FEEDBACK_FIELDS;
  const thankYouMessage = isRatings
    ? 'Thank you for rating this event!'
    : 'Your response has been recorded.';

  let form = await Form.findOne({
    event: event._id,
    type: 'feedback',
    name: { $in: lookupNames },
  }).lean();

  if (form && form.name !== name) {
    await Form.updateOne({ _id: form._id }, { $set: { name } });
    form = { ...form, name };
  }

  if (!form) {
    form = await Form.create({
      tenantOrganization: event.organization,
      event: event._id,
      name,
      description: '',
      type: 'feedback',
      fields,
      settings: {
        isActive: true,
        showThankYou: true,
        thankYouMessage,
        allowMultiple: true,
      },
    });
    form = form.toObject();
  }

  return form;
}

module.exports = {
  BUILTIN_FEEDBACK_FORM_NAME,
  BUILTIN_RATINGS_FORM_NAME,
  isBuiltinVisitorFormName,
  ensureBuiltinVisitorForm,
};