const crypto = require('crypto');

const jobs = new Map();

function createJob(total) {
  const id = crypto.randomUUID();
  jobs.set(id, {
    id,
    status: 'processing',
    total,
    processed: 0,
    errors: 0,
    download: null,
    startedAt: new Date()
  });
  return id;
}

function incrementProcessed(id) {
  const job = jobs.get(id);
  if (job) job.processed++;
}

function incrementErrors(id) {
  const job = jobs.get(id);
  if (job) job.errors++;
}

function finishJob(id, download) {
  const job = jobs.get(id);
  if (job) {
    job.status = 'done';
    job.download = download;
    job.finishedAt = new Date();
  }
}

function failJob(id, error) {
  const job = jobs.get(id);
  if (job) {
    job.status = 'error';
    job.error = error;
  }
}

function getJob(id) {
  return jobs.get(id);
}

module.exports = {
  createJob,
  incrementProcessed,
  incrementErrors,
  finishJob,
  failJob,
  getJob
};