const { addJob } = require('../utils/scheduledEmails');
const { v4: uuidv4 } = require('uuid');

// @desc    Schedule multiple automation emails for an event
// @route   POST /api/automations/schedule
// @access  Private/Supervisor or Admin
async function scheduleAutomations(req, res) {
  try {
    const { eventId, jobs } = req.body || {};
    if (!eventId || typeof eventId !== 'string') {
      return res.status(400).json({ message: 'eventId is required' });
    }
    if (!Array.isArray(jobs) || jobs.length === 0) {
      return res.status(400).json({ message: 'jobs must be a non-empty array' });
    }

    const created = [];
    for (const j of jobs) {
      if (!j || !j.scheduledAt || !j.subject || !(j.html || j.text)) continue;
      const when = new Date(j.scheduledAt);
      if (isNaN(when.getTime())) continue;
      const payload = {
        subject: String(j.subject),
        html: j.html ? String(j.html) : undefined,
        text: (!j.html && j.text) ? String(j.text) : (j.text ? String(j.text) : undefined),
        template: 'custom',
        filter: { status: undefined, attendeeIds: undefined },
      };
      if (j.promoEventId && typeof j.promoEventId === 'string') {
        payload.promoEventId = j.promoEventId;
      }
      const rec = addJob({
        id: uuidv4(),
        eventId,
        createdById: req.user?.id || null,
        scheduledAt: when.toISOString(),
        payload,
      });
      created.push(rec);
    }

    if (created.length === 0) {
      return res.status(400).json({ message: 'No valid jobs to schedule' });
    }

    return res.status(201).json({ message: `Scheduled ${created.length} automation job(s)`, jobs: created });
  } catch (error) {
    return res.status(400).json({ message: error?.message || String(error) });
  }
}

module.exports = { scheduleAutomations };