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,
} 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,
      },
      fetchPolicy: "network-only",
    });
    const { prodJobs, arrJobs, compJobs } = result.data;

    const load = {
      productionTotal: {},
    };

    //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.
      const bucketId = CheckJobBucket(buckets, item);
      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) => {
      const itemDate = moment(item.scheduled_in).format("yyyy-MM-DD");
      if (!!load[itemDate]) {
        load[itemDate].hoursIn =
          (load[itemDate].hoursIn || 0) +
          item.labhrs.aggregate.sum.mod_lb_hrs +
          item.larhrs.aggregate.sum.mod_lb_hrs;
        load[itemDate].jobsIn.push(item);
      } else {
        load[itemDate] = {
          jobsIn: [item],
          jobsOut: [],
          hoursIn:
            item.labhrs.aggregate.sum.mod_lb_hrs +
            item.larhrs.aggregate.sum.mod_lb_hrs,
        };
      }
    });

    compJobs.forEach((item) => {
      const itemDate = moment(item.scheduled_completion).format("yyyy-MM-DD");
      if (!!load[itemDate]) {
        load[itemDate].hoursOut =
          (load[itemDate].hoursOut || 0) +
          item.labhrs.aggregate.sum.mod_lb_hrs +
          item.larhrs.aggregate.sum.mod_lb_hrs;
        load[itemDate].jobsOut.push(item);
      } else {
        load[itemDate] = {
          jobsOut: [item],
          hoursOut:
            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());
    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 || []
        );
      } else {
        load[current].expectedLoad = CalculateLoad(
          load[prev].expectedLoad,
          buckets,
          load[current].jobsIn || [],
          load[current].jobsOut || []
        );
      }
    }

    yield put(scheduleLoadSuccess(load));
  } catch (error) {
    //console.log("Error in sendEmailFailure saga.", error.message);
    console.log("error", error);
    yield put(scheduleLoadFailure(error));
  }
}

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

export function* insertAuditTrailSaga({
  payload: { jobid, billid, operation },
}) {
  const state = yield select();
  const bodyshop = state.user.bodyshop;
  const currentUser = state.user.currentUser;
  console.log(
    "Inserting audit trail for",
    bodyshop.shopname,
    currentUser.email,
    jobid,
    billid,
    operation
  );
  const variables = {
    auditObj: {
      bodyshopid: bodyshop.id,
      jobid,
      billid,
      operation,
      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.insert_audit_trail_one,
              query: INSERT_AUDIT_TRAIL,
              variables,
            });
            return [...existingAuditTrail, newAuditTrail];
          },
        },
      });
    },
  });
}

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