const { GraphQLClient } = require("graphql-request");
const queries = require("../graphql-client/queries");

/**
 * Query job + related entities.
 * Supports { socket } (GraphQL) and/or { redisHelpers } (cache/fetch).
 */
async function QueryJobData(ctx = {}, jobId) {
  if (!jobId) throw new Error("jobId required");

  const { redisHelpers, socket } = ctx;

  if (redisHelpers) {
    if (typeof redisHelpers.getJobFromCache === "function") {
      try {
        const hit = await redisHelpers.getJobFromCache(jobId);
        if (hit) return hit;
      } catch {}
    }
    if (typeof redisHelpers.fetchJobById === "function") {
      const full = await redisHelpers.fetchJobById(jobId);
      if (full) return full;
    }
  }

  if (socket) {
    const endpoint = process.env.GRAPHQL_ENDPOINT;
    if (!endpoint) throw new Error("GRAPHQL_ENDPOINT not configured");

    const token = (socket?.data && socket.data.authToken) || (socket?.handshake?.auth && socket.handshake.auth.token);

    if (!token) throw new Error("Missing bearer token on socket for GraphQL fetch");

    const client = new GraphQLClient(endpoint, {});
    const resp = await client
      .setHeaders({ Authorization: `Bearer ${token}` })
      .request(queries.QUERY_JOBS_FOR_CDK_EXPORT, { id: jobId });

    const job = resp?.jobs_by_pk;
    if (job) return job;
    throw new Error("QueryJobData: job not found via GraphQL");
  }

  throw new Error("QueryJobData: no available method to load job (need socket or redisHelpers)");
}

/**
 * Build RR create/update RO payload.
 * Prefers selectedVehicle.vin (if present) over job VIN.
 */
function buildRRRepairOrderPayload({ job, selectedCustomer, selectedVehicle, advisorNo }) {
  const custNo =
    selectedCustomer?.custNo ||
    selectedCustomer?.customerNo ||
    selectedCustomer?.CustNo ||
    selectedCustomer?.CustomerNo;

  if (!custNo) throw new Error("No RR customer selected (custNo missing)");

  const vin = selectedVehicle?.vin || job?.vehicle?.vin || job?.v_vin || job?.vehicle_vin;

  if (!vin) throw new Error("No VIN available (select or create a vehicle)");

  return {
    repairOrderNumber: String(job?.job_number || job?.id),
    deptType: "B",
    vin,
    custNo,
    advNo: advisorNo || undefined
  };
}

module.exports = {
  QueryJobData,
  buildRRRepairOrderPayload
};