const express = require("express");
const { createJob, updateJob, getJob, listJobs, canStartJob } = require("../src/pipelineJobs");
const { runKytPipelineJob } = require("../src/runKytPipelineJob");
const { getToken } = require("../tokenStore");
const { getSource, listSources } = require("../src/business-logic/import-pipeline/sources");

const router = express.Router();

router.post("/run", async (req, res) => {
  const { shop, limit = null, source = "kyt" } = req.body || {};

  if (!shop) {
    return res.status(400).json({ error: "Missing shop." });
  }

  let sourceConfig;
  try {
    sourceConfig = getSource(source);
  } catch (error) {
    return res.status(400).json({ error: error.message });
  }

  if (!getToken(shop)) {
    return res.status(400).json({ error: "No stored Shopify token found for this shop. Complete app auth first." });
  }

  if (!canStartJob(shop, sourceConfig.sourceKey)) {
    return res.status(409).json({ error: `An import job is already running for ${shop} and source ${sourceConfig.sourceKey}.` });
  }

  const job = createJob({ shop, limit, source: sourceConfig.sourceKey });
  updateJob(job.id, {
    status: "queued",
    step: "queued",
    detail: `${sourceConfig.label} import job queued`,
  });

  setImmediate(() => {
    runKytPipelineJob(job);
  });

  return res.json({
    jobId: job.id,
    status: "queued",
    shop,
    source: sourceConfig.sourceKey,
    limit,
  });
});

router.get("/sources", (req, res) => {
  return res.json({ sources: listSources() });
});

router.get("/status/:jobId", (req, res) => {
  const job = getJob(req.params.jobId);
  if (!job) {
    return res.status(404).json({ error: "Job not found." });
  }

  return res.json(job);
});

router.get("/jobs", (req, res) => {
  return res.json({ jobs: listJobs() });
});

module.exports = router;