#!/usr/bin/env node
/**
 * Configure static microsite v2 for an event using crest-novel template + site.json content.
 *
 * Usage:
 *   node scripts/setup-crest-novel-microsite.js [--publish] [--event-id=<id>] [--subdomain=<sub>]
 */
const path = require('path');
require('dotenv').config({ path: path.join(__dirname, '..', '.env') });
const fs = require('fs');
const mongoose = require('mongoose');
const { connectDB } = require('../src/config/database');
const Event = require('../src/models/Event');
const Form = require('../src/models/Form');
const MicrositeV2Template = require('../src/models/MicrositeV2Template');
const EventStaticMicrosite = require('../src/models/EventStaticMicrosite');
const User = require('../src/models/User');
const { normalizeSubdomain, subdomainAvailability } = require('../src/utils/subdomainAvailability');
const { uploadTemplateAsset } = require('../src/utils/s3MicrositeV2');
const { publishStaticMicrosite } = require('../src/utils/publishStaticMicrosite');
const { resolveConfigAssetUrls } = require('../src/utils/micrositeConfigAssets');

const DEFAULT_EVENT_ID = '6a4cb75a7475c040cc6f2dd7';
const DEFAULT_SUBDOMAIN = 'novel2026-goa-8-9-aug';
const TEMPLATE_SLUG = 'crest-novel';
const SITE_JSON = path.join(__dirname, '..', '..', 'microsites', 'crest-novel', 'site.json');
const PUBLIC_WEB_BASE = (process.env.PUBLIC_WEB_BASE || 'https://web.eventbuzz.live').replace(/\/$/, '');

function argValue(name, fallback) {
  const hit = process.argv.find((a) => a.startsWith(`--${name}=`));
  return hit ? hit.split('=').slice(1).join('=').trim() : fallback;
}

function deepClone(obj) {
  return JSON.parse(JSON.stringify(obj));
}

function replaceEventIds(obj, oldId, newId) {
  if (obj == null) return obj;
  if (typeof obj === 'string') {
    return obj.split(oldId).join(newId);
  }
  if (Array.isArray(obj)) return obj.map((v) => replaceEventIds(v, oldId, newId));
  if (typeof obj === 'object') {
    const out = {};
    for (const [k, v] of Object.entries(obj)) out[k] = replaceEventIds(v, oldId, newId);
    return out;
  }
  return obj;
}

function siteJsonToConfig(site, eventId) {
  const theme = site.theme || {};
  const headingColor = theme.heading?.color || theme.headingColor || '#015AAA';
  return {
    meta: {
      title: site.meta?.title || 'NOVEL Lung Health Summit',
      eventId: String(eventId),
    },
    theme: {
      accent: theme.accent || '#189A95',
      headingColor,
    },
    sections: deepClone(site.components || {}),
  };
}

async function findSeedUser() {
  const userIdArg = argValue('user-id', '');
  if (userIdArg) {
    const u = await User.findById(userIdArg);
    if (u) return u;
  }
  const platform = await User.findOne({ platform_admin: 'yes', isActive: { $ne: false } }).sort({ createdAt: 1 });
  if (platform) return platform;
  const superAdmin = await User.findOne({ role: 'super_admin' }).sort({ createdAt: 1 });
  if (superAdmin) return superAdmin;
  throw new Error('No user found for updatedBy/publish. Pass --user-id=<mongoId>');
}

async function findRegistrationForm(eventId) {
  return Form.findOne({ event: eventId, type: 'registration', 'settings.isActive': { $ne: false } })
    .sort({ createdAt: 1 })
    .select('_id name')
    .lean();
}

async function findFeedbackForm(eventId) {
  return Form.findOne({ event: eventId, type: 'feedback', 'settings.isActive': { $ne: false } })
    .sort({ createdAt: 1 })
    .select('_id name')
    .lean();
}

function applyEventUrls(config, eventId, registrationFormId, feedbackFormId, eventDoc) {
  const regUrl = registrationFormId
    ? `${PUBLIC_WEB_BASE}/event/${eventId}/form/${registrationFormId}`
    : `${PUBLIC_WEB_BASE}/event/${eventId}/register`;
  const feedbackUrl = feedbackFormId
    ? `${PUBLIC_WEB_BASE}/event/${eventId}/form/${feedbackFormId}`
    : null;

  const sections = config.sections || {};

  if (sections.hero?.cta) {
    sections.hero.cta.url = regUrl;
    sections.hero.cta.target = '_blank';
  }
  if (sections.footer?.links && Array.isArray(sections.footer.links)) {
    for (const link of sections.footer.links) {
      if (link.text && /register/i.test(link.text)) link.url = regUrl;
      if (link.text && /feedback/i.test(link.text) && feedbackUrl) link.url = feedbackUrl;
    }
  }
  if (sections.feedback && feedbackUrl) {
    sections.feedback.url = feedbackUrl;
  }

  if (eventDoc?.banner && sections.hero?.image) {
    sections.hero.image.url = eventDoc.banner;
  }

  return config;
}

async function syncTemplateSiteConfigJs() {
  const siteConfigPath = path.join(
    __dirname,
    '..',
    'microsite-v2-templates',
    TEMPLATE_SLUG,
    'assets',
    'js',
    'site-config.js',
  );
  if (!fs.existsSync(siteConfigPath)) {
    throw new Error(`Missing site-config.js at ${siteConfigPath}`);
  }
  await uploadTemplateAsset(
    TEMPLATE_SLUG,
    'js/site-config.js',
    fs.readFileSync(siteConfigPath),
    'application/javascript',
  );
  console.log('Uploaded crest-novel site-config.js to template assets');
}

async function main() {
  const eventId = argValue('event-id', DEFAULT_EVENT_ID);
  const subdomainRaw = argValue('subdomain', DEFAULT_SUBDOMAIN);
  const shouldPublish = process.argv.includes('--publish');

  if (!mongoose.Types.ObjectId.isValid(eventId)) {
    throw new Error(`Invalid event id: ${eventId}`);
  }

  if (!fs.existsSync(SITE_JSON)) {
    throw new Error(`Missing site.json at ${SITE_JSON}`);
  }

  await connectDB();

  const event = await Event.findById(eventId).lean();
  if (!event) throw new Error(`Event not found: ${eventId}`);

  const template = await MicrositeV2Template.findOne({ slug: TEMPLATE_SLUG, isActive: true });
  if (!template) {
    throw new Error(`Active template "${TEMPLATE_SLUG}" not found. Run: npm run seed:crest-novel-template`);
  }

  const user = await findSeedUser();
  const subdomain = normalizeSubdomain(subdomainRaw);
  if (!subdomain) throw new Error(`Invalid subdomain: ${subdomainRaw}`);

  const existing = await EventStaticMicrosite.findOne({ event: eventId });
  const avail = await subdomainAvailability(subdomain, eventId, existing?._id?.toString());
  if (!avail.available) throw new Error(avail.message || 'Subdomain not available');

  const site = JSON.parse(fs.readFileSync(SITE_JSON, 'utf8'));
  const oldEventId = site.meta?.eventId || '6a43e05fdc940a0d6e057f7b';

  let config = siteJsonToConfig(site, eventId);
  config = replaceEventIds(config, oldEventId, eventId);

  const registrationForm = await findRegistrationForm(eventId);
  const feedbackForm = await findFeedbackForm(eventId);
  config = applyEventUrls(config, eventId, registrationForm?._id, feedbackForm?._id, event);
  config.sections = resolveConfigAssetUrls(config.sections || {}, template.assetsBaseUrl);

  await syncTemplateSiteConfigJs();

  const payload = {
    event: event._id,
    organization: event.organization,
    subdomain,
    template: template._id,
    config,
    status: 'draft',
    updatedBy: user._id,
  };

  let siteDoc;
  if (existing) {
    Object.assign(existing, payload);
    await existing.save();
    siteDoc = existing;
    console.log(`Updated EventStaticMicrosite: ${existing._id}`);
  } else {
    siteDoc = await EventStaticMicrosite.create(payload);
    console.log(`Created EventStaticMicrosite: ${siteDoc._id}`);
  }

  console.log(`Event:     ${event.name} (${eventId})`);
  console.log(`Template:  ${template.name} (${template.slug})`);
  console.log(`Subdomain: ${subdomain}`);
  console.log(`Reg form:  ${registrationForm?._id || '(none — using /register fallback)'}`);
  console.log(`Feedback:  ${feedbackForm?._id || '(none)'}`);

  if (shouldPublish) {
    console.log('Publishing...');
    const populated = await EventStaticMicrosite.findById(siteDoc._id).populate('template');
    const result = await publishStaticMicrosite({
      staticMicrosite: populated,
      template: populated.template,
      userId: user._id,
    });
    Object.assign(populated, result);
    await populated.save();
    console.log(`Published: ${result.publicUrl}`);
  } else {
    console.log('Saved as draft. Re-run with --publish to publish.');
  }

  await mongoose.disconnect();
}

main().catch((err) => {
  console.error(err);
  process.exit(1);
});