import moment from "moment";
import { all, call, put, select, takeLatest } from "redux-saga/effects";
import { QUERY_SCHEDULE_LOAD_DATA } from "../../graphql/appointments.queries";
import { INSERT_AUDIT_TRAIL } from "../../graphql/audit_trail.queries";
import client from "../../utils/GraphQLClient";
import { CalculateLoad, CheckJobBucket } from "../../utils/SSSUtils";
import {
  scheduleLoadFailure,
  scheduleLoadSuccess,
  setProblemJobs,
} from "./application.actions";
import ApplicationActionTypes from "./application.types";

export function* onCalculateScheduleLoad() {
  yield takeLatest(
    ApplicationActionTypes.CALCULATE_SCHEDULE_LOAD,
    calculateScheduleLoad
  );
}
export function* calculateScheduleLoad({ payload: end }) {
  //REMINDER: Moment.js is not immutable. Today WILL change when adjusted.
  const today = moment().startOf("day");
  const state = yield select();
  const buckets = state.user.bodyshop.ssbuckets;

  try {
    const result = yield client.query({
      query: QUERY_SCHEDULE_LOAD_DATA,
      variables: {
        start: today,
        end: end,
      },
    });
    const { prodJobs, arrJobs, compJobs } = result.data;

    const load = {
      productionTotal: {},
      productionHours: 0,
    };
    let problemJobs = [];
    //Set the current load.
    buckets.forEach((bucket) => {
      load.productionTotal[bucket.id] = { count: 0, label: bucket.label };
    });

    prodJobs.forEach((item) => {
      //Add all of the jobs currently in production to the buckets so that we have a starting point.
      if (
        !item.actual_completion &&
        moment(item.scheduled_completion).isBefore(moment().startOf("day"))
      ) {
        problemJobs.push({
          ...item,
          code: "Job was scheduled to go, but it has not been completed. Update the scheduled completion date to correct projections",
        });
      }

      if (
        item.actual_completion &&
        moment(item.actual_completion).isBefore(moment().startOf("day"))
      ) {
        problemJobs.push({
          ...item,
          code: "Job is already marked as completed, but it is still in production. This job should be removed from production",
        });
      }
      if (!(item.actual_completion || item.scheduled_completion)) {
        problemJobs.push({
          ...item,
          code: "Job does not have a scheduled or actual completion date. Update the scheduled or actual completion dates to correct projections",
        });
      }

      const bucketId = CheckJobBucket(buckets, item);
      load.productionHours =
        load.productionHours +
        item.labhrs.aggregate.sum.mod_lb_hrs +
        item.larhrs.aggregate.sum.mod_lb_hrs;
      if (bucketId) {
        load.productionTotal[bucketId].count =
          load.productionTotal[bucketId].count + 1;
      } else {
        console.log("Uh oh, this job doesn't fit in a bucket!", item);
      }
    });

    arrJobs.forEach((item) => {
      if (!item.scheduled_in) {
        console.log("JOB HAS NO SCHEDULED IN DATE.", item);
        problemJobs.push({
          ...item,
          code: "Job has no scheduled in date",
        });
      }
      if (!item.actual_completion && item.actual_in && !item.inproduction) {
        problemJobs.push({
          ...item,
          code: "Job has an actual in date, but no actual completion date and is not marked as in production",
        });
      }
      if (item.actual_in && moment(item.actual_in).isAfter(moment())) {
        problemJobs.push({
          ...item,
          code: "Job has an actual in date set in the future",
        });
      }
      if (
        item.actual_completion &&
        moment(item.actual_completion).isAfter(moment())
      ) {
        problemJobs.push({
          ...item,
          code: "Job has an actual completion date set in the future",
        });
      }
      if (item.actual_completion && item.inproduction) {
        problemJobs.push({
          ...item,
          code: "Job has an actual completion date but it is still marked in production",
        });
      }

      const itemDate = moment(item.actual_in || item.scheduled_in).format(
        "yyyy-MM-DD"
      );

      const AddJobForSchedulingCalc = !item.inproduction;

      if (!!load[itemDate]) {
        load[itemDate].allHoursIn =
          (load[itemDate].allHoursIn || 0) +
          item.labhrs.aggregate.sum.mod_lb_hrs +
          item.larhrs.aggregate.sum.mod_lb_hrs;

        //If the job hasn't already arrived, add it to the jobs in list.
        // Make sure it also hasn't already been completed, or isn't an in and out job.
        //This prevents the duplicate counting.
        load[itemDate].allJobsIn.push(item);
        if (AddJobForSchedulingCalc) {
          load[itemDate].jobsIn.push(item);
          load[itemDate].hoursIn =
            (load[itemDate].hoursIn || 0) +
            item.labhrs.aggregate.sum.mod_lb_hrs +
            item.larhrs.aggregate.sum.mod_lb_hrs;
        }
      } else {
        load[itemDate] = {
          allJobsIn: [item],
          jobsIn: AddJobForSchedulingCalc ? [item] : [], //Same as above, only add it if it isn't already in production.
          jobsOut: [],
          allJobsOut: [],
          allHoursIn:
            item.labhrs.aggregate.sum.mod_lb_hrs +
            item.larhrs.aggregate.sum.mod_lb_hrs,
          hoursIn: AddJobForSchedulingCalc
            ? item.labhrs.aggregate.sum.mod_lb_hrs +
              item.larhrs.aggregate.sum.mod_lb_hrs
            : 0,
        };
      }
    });

    compJobs.forEach((item) => {
      if (!(item.actual_completion || item.scheduled_completion))
        console.warn("JOB HAS NO COMPLETION DATE.", item);

      const inProdJobs = prodJobs.find((p) => p.id === item.id);
      const inArrJobs = arrJobs.find((p) => p.id === item.id);

      const AddJobForSchedulingCalc = inProdJobs || inArrJobs;

      const itemDate = moment(
        item.actual_completion || item.scheduled_completion
      ).format("yyyy-MM-DD");
      //Skip it, it's already completed.

      if (!!load[itemDate]) {
        load[itemDate].allHoursOut =
          (load[itemDate].allHoursOut || 0) +
          item.labhrs.aggregate.sum.mod_lb_hrs +
          item.larhrs.aggregate.sum.mod_lb_hrs;
        //Add only the jobs that are still in production to get rid of.
        //If it's not in production, we'd subtract unnecessarily.
        load[itemDate].allJobsOut.push(item);

        if (AddJobForSchedulingCalc) {
          load[itemDate].jobsOut.push(item);
          load[itemDate].hoursOut =
            (load[itemDate].hoursOut || 0) +
            item.labhrs.aggregate.sum.mod_lb_hrs +
            item.larhrs.aggregate.sum.mod_lb_hrs;
        }
      } else {
        load[itemDate] = {
          allJobsOut: [item],
          jobsOut: AddJobForSchedulingCalc ? [item] : [], //Same as above.
          hoursOut: AddJobForSchedulingCalc
            ? item.labhrs.aggregate.sum.mod_lb_hrs +
              item.larhrs.aggregate.sum.mod_lb_hrs
            : 0,
          allHoursOut:
            item.labhrs.aggregate.sum.mod_lb_hrs +
            item.larhrs.aggregate.sum.mod_lb_hrs,
        };
      }
    });

    //Propagate the expected load to each day.

    const range = Math.round(moment.duration(end.diff(today)).asDays()) + 1;
    for (var day = 0; day < range; day++) {
      const current = moment(today).add(day, "days").format("yyyy-MM-DD");
      const prev = moment(today)
        .add(day - 1, "days")
        .format("yyyy-MM-DD");
      if (!!!load[current]) {
        load[current] = {};
      }

      if (day === 0) {
        //Starting on day 1. The load is current.
        load[current].expectedLoad = CalculateLoad(
          load.productionTotal,
          buckets,
          load[current].jobsIn || [],
          load[current].jobsOut || []
        );
        load[current].expectedJobCount =
          prodJobs.length +
          (load[current].jobsIn || []).length -
          (load[current].jobsOut || []).length;
        load[current].expectedHours =
          load.productionHours +
          (load[current].hoursIn || 0) -
          (load[current].hoursOut || 0);
      } else {
        load[current].expectedLoad = CalculateLoad(
          load[prev].expectedLoad,
          buckets,
          load[current].jobsIn || [],
          load[current].jobsOut || []
        );
        load[current].expectedJobCount =
          load[prev].expectedJobCount +
          (load[current].jobsIn || []).length -
          (load[current].jobsOut || []).length;
        load[current].expectedHours =
          load[prev].expectedHours +
          (load[current].hoursIn || 0) -
          (load[current].hoursOut || 0);
      }
    }

    yield put(setProblemJobs(problemJobs));
    yield put(scheduleLoadSuccess(load));
  } catch (error) {
    yield put(scheduleLoadFailure(error));
  }
}

export function* onInsertAuditTrail() {
  yield takeLatest(
    ApplicationActionTypes.INSERT_AUDIT_TRAIL,
    insertAuditTrailSaga
  );
}

export function* insertAuditTrailSaga({
  payload: { jobid, billid, operation, type },
}) {
  const state = yield select();
  const bodyshop = state.user.bodyshop;
  const currentUser = state.user.currentUser;

  const variables = {
    auditObj: {
      bodyshopid: bodyshop.id,
      jobid,
      billid,
      operation,
      type,
      useremail: currentUser.email,
    },
  };
  yield client.mutate({
    mutation: INSERT_AUDIT_TRAIL,
    variables,
    update(cache, { data }) {
      cache.modify({
        fields: {
          audit_trail(existingAuditTrail, { readField }) {
            const newAuditTrail = cache.writeQuery({
              data: data,
              query: INSERT_AUDIT_TRAIL,
              variables,
            });
            return [...existingAuditTrail, newAuditTrail];
          },
        },
      });
    },
  });
}

export function* applicationSagas() {
  yield all([call(onCalculateScheduleLoad), call(onInsertAuditTrail)]);
}