// api_v1/scanner/recordChange.js
const { log } = require('./logger');
const wss = require('../../ws-server');   // IMPORTANTE

async function recordChange(db, photo_id, user, change_type) {
  const timestamp = new Date().toISOString();

  // -----------------------------------------------------
  // DEDUPLICA SOLO PER "removed"
  // -----------------------------------------------------
  if (change_type === 'removed') {
    const already = await db('photo_changes')
      .where({ photo_id, user, change_type: 'removed' })
      .first();

    if (already) {
      log(`📘 [CHANGES] removed già registrato → ${photo_id}, ma invio comunque WS`);

      // -----------------------------------------------------
      // 🔥 INVIA WS ANCHE SE GIÀ REGISTRATO
      // -----------------------------------------------------

      console.log("WS → invio evento (USER) [removed già registrato]");
      try {
        wss.broadcastToUser(user, {
          type: "removed",
          id: photo_id
        });
        console.log("WS → OK USER (removed già registrato)");
      } catch (e) {
        console.error("WS → ERRORE USER (removed già registrato):", e);
      }

      console.log("WS → invio evento (ADMIN) [removed già registrato]");
      try {
        wss.broadcastToAdmins({
          type: "removed",
          id: photo_id,
          user
        });
        console.log("WS → OK ADMIN (removed già registrato)");
      } catch (e) {
        console.error("WS → ERRORE ADMIN (removed già registrato):", e);
      }

      return;
    }
  }

  // -----------------------------------------------------
  // SALVA NEL DB (added o primo removed)
  // -----------------------------------------------------
  await db("photo_changes").insert({
    photo_id,
    user,
    change_type,
    timestamp
  });

  log(`📘 [CHANGES] ${change_type} → ${photo_id}`);

  // -----------------------------------------------------
  // LOG PRIMA DEL BROADCAST
  // -----------------------------------------------------
  console.log("WS → invio evento:", { user, change_type, photo_id });

  // -----------------------------------------------------
  // 🔥 BROADCAST A USER
  // -----------------------------------------------------
  console.log("WS → invio evento (USER)");
  try {
    wss.broadcastToUser(user, {
      type: change_type,
      id: photo_id
    });
    console.log("WS → OK USER");
  } catch (e) {
    console.error("WS → ERRORE USER:", e);
  }

  // -----------------------------------------------------
  // 🔥 BROADCAST A ADMIN
  // -----------------------------------------------------
  console.log("WS → invio evento (ADMIN)");
  try {
    wss.broadcastToAdmins({
      type: change_type,
      id: photo_id,
      user
    });
    console.log("WS → OK ADMIN");
  } catch (e) {
    console.error("WS → ERRORE ADMIN:", e);
  }
}

module.exports = recordChange;