// tools/taskTimer.js

require('dotenv').config();

const db = require('../db/knex');

const {
  runCycle: runFaceClusteringCycle,
} = require(
  './runFaceClusteringScheduler'
);

const {
  cleanupCast,
} = require(
  './cleanupCast'
);


/*
 * Face clustering:
 * ogni ora.
 */
const CLUSTER_INTERVAL_MS =
  60 * 60 * 1000;


/*
 * Cleanup Cast:
 * una volta al giorno.
 */
const CLEANUP_INTERVAL_MS =
  24 * 60 * 60 * 1000;


let clusterRunning = false;
let cleanupRunning = false;


/*
 * ============================================================
 * FACE CLUSTERING
 * ============================================================
 */
async function runClustering() {
  if (clusterRunning) {
    console.log(
      '[taskTimer] clustering already running, skip'
    );

    return;
  }

  clusterRunning = true;

  const startedAt = Date.now();

  console.log(
    '[taskTimer] clustering cycle start'
  );

  try {
    await runFaceClusteringCycle();

    console.log(
      '[taskTimer] clustering cycle completed',
      `elapsedMs=${Date.now() - startedAt}`,
    );
  } catch (error) {
    console.error(
      '[taskTimer] clustering cycle error',
      error,
    );
  } finally {
    clusterRunning = false;
  }
}


/*
 * ============================================================
 * CLEANUP CAST
 * ============================================================
 */
async function runCleanup() {
  if (cleanupRunning) {
    console.log('[taskTimer] cleanup already running, skip');
    return;
  }

  cleanupRunning = true;
  const startedAt = Date.now();

  console.log('[taskTimer] cleanup cycle start');

  try {
    // Mantiene la pulizia HLS/Cast esistente.
    try {
      await cleanupCast({ dryRun: false });
    } catch (error) {
      console.error('[taskTimer] cleanup Cast error', error);
    }

    // Elimina solo job terminali completati da oltre 24 ore.
    for (const table of [
      'photo_ingest_jobs',
      'activity_ingest_jobs',
    ]) {
      try {
        if (!(await db.schema.hasTable(table))) {
          console.warn(`[taskTimer] table not found: ${table}`);
          continue;
        }

        const deleted = await db(table)
          .whereIn('status', ['done', 'error'])
          .whereNotNull('completed_at')
          .whereRaw(
            "datetime(completed_at) < datetime('now', '-24 hours')"
          )
          .del();

        console.log(
          `[taskTimer] ${table}: removed ${deleted} expired jobs`
        );
      } catch (error) {
        console.error(`[taskTimer] ${table} cleanup error`, error);
      }
    }

    console.log(
      '[taskTimer] cleanup cycle completed',
      `elapsedMs=${Date.now() - startedAt}`,
    );
  } finally {
    cleanupRunning = false;
  }
}

/*
 * ============================================================
 * MAIN
 * ============================================================
 */
async function main() {
  console.log(
    '[taskTimer] started'
  );

  console.log(
    '[taskTimer] clustering interval:',
    `${CLUSTER_INTERVAL_MS / 60000} minutes`,
  );

  console.log(
    '[taskTimer] cleanup interval:',
    `${CLEANUP_INTERVAL_MS / 3600000} hours`,
  );

  /*
   * Clustering immediato all'avvio.
   */
  await runClustering();

  /*
   * Cleanup anche all'avvio.
   *
   * ATTENZIONE:
   * cleanupCast garantisce comunque che file
   * con meno di 24 ore non vengano cancellati.
   */
  await runCleanup();

  setInterval(
    () => {
      void runClustering();
    },
    CLUSTER_INTERVAL_MS,
  );

  setInterval(
    () => {
      void runCleanup();
    },
    CLEANUP_INTERVAL_MS,
  );

  console.log(
    '[taskTimer] timers armed'
  );
}


main().catch((error) => {
  console.error(
    '[taskTimer] fatal error',
    error,
  );

  process.exitCode = 1;
});