const GraphQLClient = require("graphql-request").GraphQLClient;
const path = require("path");
const queries = require("../graphql-client/queries");
const Dinero = require("dinero.js");
const moment = require("moment");

require("dotenv").config({
  path: path.resolve(
    process.cwd(),
    `.env.${process.env.NODE_ENV || "development"}`
  ),
});

exports.job = async (req, res) => {
  try {
    const BearerToken = req.headers.authorization;
    const { jobId } = req.body;
    console.log("exports.job -> jobId", jobId);

    const client = new GraphQLClient(process.env.GRAPHQL_ENDPOINT, {
      headers: {
        Authorization: BearerToken,
      },
    });

    const result = await client
      .setHeaders({ Authorization: BearerToken })
      .request(queries.QUERY_UPCOMING_APPOINTMENTS, {
        now: new Date(),
        jobId: jobId,
      });

    const { appointments, jobs } = result;
    const { ssbuckets, workingdays } = result.jobs_by_pk.bodyshop;
    const jobHrs = result.jobs_by_pk.jobhrs.aggregate.sum.mod_lb_hrs;

    const JobBucket = ssbuckets.filter(
      (bucket) =>
        bucket.gte <= jobHrs && (!!bucket.lt ? bucket.lt > jobHrs : true)
    )[0];

    const bucketMatrix = {};
    const yesterday = moment().subtract(1, "day");
    //Get latest date + add 5 days to allow for back end adding..
    const totalMatrixDays = moment
      .max([
        ...appointments.map((a) => moment(a.start)),
        ...jobs
          .map((p) => moment(p.scheduled_completion))
          .filter((p) => p.isValid() && p.isAfter(yesterday)),
      ])
      .add("5", "days")
      .diff(moment(), "days");

    //Initialize the bucket matrix
    for (i = 0; i < totalMatrixDays; i++) {
      const theDate = moment().add(i, "days").format("yyyy-MM-DD");
      //Only need to create a matrix for jobs of the same bucket.
      bucketMatrix[theDate] = { in: 0, out: 0 };

      // ssbuckets.forEach((bucket) => {
      //   bucketMatrix[theDate] = {
      //     ...bucketMatrix[theDate],
      //     [bucket.id]: { in: 0, out: 0 },
      //   };
      // });
    }

    //Populate the jobs scheduled to come in.
    appointments.forEach((appointment) => {
      if (!appointment.block) {
        const jobHrs =
          appointment.job.joblines_aggregate.aggregate.sum.mod_lb_hrs;
        //Is the job in the same bucket?
        const appointmentBucket = ssbuckets.filter(
          (bucket) =>
            bucket.gte <= jobHrs && (!!bucket.lt ? bucket.lt > jobHrs : true)
        )[0];
        if (appointmentBucket.id === JobBucket.id) {
          //Theyre the same classification. Add it to the matrix.
          const appDate = moment(appointment.start).format("yyyy-MM-DD");
          bucketMatrix[appDate] = {
            ...bucketMatrix[appDate],
            in: bucketMatrix[appDate].in + 1,
          };
        }
      } else {
        //remove the date from the possible list.
        const appDate = moment(appointment.start).format("yyyy-MM-DD");
        delete bucketMatrix[appDate];
      }
    });

    //Populate the jobs that are leaving today.
    const todayIsoString = moment().format("yyyy-MM-DD");
    jobs.forEach((pjob) => {
      const jobHrs =
        pjob.larhrs.aggregate.sum.mod_lb_hrs +
        pjob.labhrs.aggregate.sum.mod_lb_hrs;
      //Is the job in the same bucket?
      const pjobBucket = ssbuckets.filter(
        (bucket) =>
          bucket.gte <= jobHrs && (!!bucket.lt ? bucket.lt > jobHrs : true)
      )[0];
      if (pjobBucket.id === JobBucket.id) {
        //Theyre the same classification. Add it to the matrix.
        const compDate = moment(pjob.scheduled_completion);
        //Is the schedule completion behind today? If so, use today as it.
        let dateToUse;
        dateToUse = compDate.isValid()
          ? moment().diff(compDate, "days") < 0
            ? compDate.format("yyyy-MM-DD")
            : todayIsoString
          : todayIsoString;

        bucketMatrix[dateToUse] = {
          ...bucketMatrix[dateToUse],
          out: (bucketMatrix[dateToUse].out || 0) + 1,
        };
      }
    });

    //Propose the first 5 dates where we are below target.

    const possibleDates = [];
    const bucketMatrixKeys = Object.keys(bucketMatrix);
    bucketMatrixKeys.forEach((bmkey) => {
      const isShopOpen = workingdays[dayOfWeekMapper(moment(bmkey).day())];

      if (
        JobBucket.target > bucketMatrix[bmkey].in - bucketMatrix[bmkey].out &&
        isShopOpen
      )
        possibleDates.push(new Date(bmkey).toISOString().substr(0, 10));
    });
    console.log("possibleDates", possibleDates, "bucketMatrix", bucketMatrix);
    res.json(possibleDates);
  } catch (error) {
    console.log("error", error);
    res.status(400).send(error);
  }
};

const dayOfWeekMapper = (numberOfDay) => {
  switch (numberOfDay) {
    case 0:
      return "sunday";
    case 1:
      return "monday";
    case 2:
      return "tuesday";
    case 3:
      return "wednesday";
    case 4:
      return "thursday";
    case 5:
      return "friday";
    case 6:
      return "saturday";
  }
};