const Dinero = require("dinero.js");
const queries = require("../graphql-client/queries");
const GraphQLClient = require("graphql-request").GraphQLClient;
const _ = require("lodash");
const logger = require("../utils/logger");
// Dinero.defaultCurrency = "USD";
// Dinero.globalLocale = "en-CA";
Dinero.globalRoundingMode = "HALF_EVEN";

exports.payall = async function (req, res) {
  const BearerToken = req.headers.authorization;
  const { jobid } = req.body;
  logger.log("job-payroll-pay-all", "DEBUG", req.user.email, jobid, null);
  const client = new GraphQLClient(process.env.GRAPHQL_ENDPOINT, {
    headers: {
      Authorization: BearerToken,
    },
  });

  try {
    const { jobs_by_pk: job } = await client
      .setHeaders({ Authorization: BearerToken })
      .request(queries.QUERY_JOB_PAYROLL_DATA, {
        id: jobid,
      });

    //iterate over each ticket, building a hash of team -> employee to calculate total assigned hours.

    const assignmentHash = { unassigned: 0 };
    const employeeHash = {}; // employeeid => Cieca labor type => rate => hours. Contains how many hours each person should be paid.
    job.joblines.forEach((jobline) => {
      if (jobline.mod_lb_hrs > 0) {
        //Check if the line is assigned. If not, keep track of it as an unassigned line by type.
        if (jobline.assigned_team === null) {
          assignmentHash.unassigned =
            assignmentHash.unassigned + jobline.mod_lb_hrs;
        } else {
          //Line is assigned.
          if (!assignmentHash[jobline.assigned_team]) {
            assignmentHash[jobline.assigned_team] = 0;
          }
          assignmentHash[jobline.assigned_team] =
            assignmentHash[jobline.assigned_team] + jobline.mod_lb_hrs;

          //Create the assignment breakdown.
          const theTeam = job.bodyshop.employee_teams.find(
            (team) => team.id === jobline.assigned_team
          );

          theTeam.employee_team_members.forEach((tm) => {
            //Figure out how many hours they are owed at this line, and at what rate.
            console.log(tm);
            if (!employeeHash[tm.employee.id]) {
              employeeHash[tm.employee.id] = {};
            }
            if (!employeeHash[tm.employee.id][jobline.mod_lbr_ty]) {
              employeeHash[tm.employee.id][jobline.mod_lbr_ty] = {};
            }
            if (
              !employeeHash[tm.employee.id][jobline.mod_lbr_ty][
                tm.labor_rates[jobline.mod_lbr_ty]
              ]
            ) {
              employeeHash[tm.employee.id][jobline.mod_lbr_ty][
                tm.labor_rates[jobline.mod_lbr_ty]
              ] = 0;
            }

            const hoursOwed = (tm.percentage / 100) * jobline.mod_lb_hrs;
            employeeHash[tm.employee.id][jobline.mod_lbr_ty][
              tm.labor_rates[jobline.mod_lbr_ty]
            ] =
              employeeHash[tm.employee.id][jobline.mod_lbr_ty][
                tm.labor_rates[jobline.mod_lbr_ty]
              ] + hoursOwed;
          });
        }
      }
    });

    const ticketHash = {}; // employeeid => Cieca labor type => rate => hours.
    //Calculate how much each employee has been paid so far.
    job.timetickets.forEach((ticket) => {
      if (!ticketHash[ticket.employeeid]) {
        ticketHash[ticket.employeeid] = {};
      }
      if (!ticketHash[ticket.employeeid][ticket.ciecacode]) {
        ticketHash[ticket.employeeid][ticket.ciecacode] = {};
      }
      if (!ticketHash[ticket.employeeid][ticket.ciecacode][ticket.rate]) {
        ticketHash[ticket.employeeid][ticket.ciecacode][ticket.rate] = 0;
      }
      ticketHash[ticket.employeeid][ticket.ciecacode][ticket.rate] =
        ticketHash[ticket.employeeid][ticket.ciecacode][ticket.rate] +
        ticket.productivehrs;
      //Add the rate
    });

    if (assignmentHash.unassigned > 0) {
      res.json({ success: false, error: "Unassigned hours." });
      return;
    }

    //Calculate how much time each tech should have by labor type.
    const comparison = compare(employeeHash, ticketHash);

    const ticketsToInsert = [];

    //Check the ones that are different first. Source of truth will be the employee hash.
    comparison.different.forEach((differentKey) => {
      const empVal = employeeHash[differentKey];
      const ticketVal = ticketHash[differentKey];

      ticketsToInsert.push({
        jobid: job.id,
        employeeid: differentKey.split(".")[0],
        productivehrs: empVal - ticketVal,
        rate: differentKey.split(".")[2],
        memo: "Adjustment between expected and entered values. ",
      });
    });

    comparison.missing_from_first
      .filter((differentKey) => differentKey.split(".").length == 3)
      .forEach((differentKey) => {
        const empVal = employeeHash[differentKey];
        const ticketVal = ticketHash[differentKey];

        ticketsToInsert.push({
          jobid: job.id,
          employeeid: differentKey.split(".")[0],
          productivehrs: empVal - ticketVal * -1,
          rate: differentKey.split(".")[2],
          memo: "Entered ticket reversed to match system payroll.",
        });
      });
    comparison.missing_from_second
      .filter((differentKey) => differentKey.split(".").length == 3)
      .forEach((differentKey) => {
        const empVal = employeeHash[differentKey];
        const ticketVal = ticketHash[differentKey];

        ticketsToInsert.push({
          jobid: job.id,
          employeeid: differentKey.split(".")[0],
          productivehrs: empVal - ticketVal * -1,
          rate: differentKey.split(".")[2],
          memo: "Entered ticket reversed to match system payroll.",
        });
      });

    res.json({
      assignmentHash,
      employeeHash,
      diff: getObjectDiff(employeeHash, ticketHash),
      compare: compare(employeeHash, ticketHash),
    });
  } catch (error) {
    logger.log(
      "job-payroll-labor-totals-error",
      "ERROR",
      req.user.email,
      jobid,
      {
        jobid: jobid,
        error,
      }
    );
    res.status(503).send();
  }
};

function getObjectDiff(obj1, obj2) {
  const diff = Object.keys(obj1).reduce((result, key) => {
    if (!obj2.hasOwnProperty(key)) {
      result.push(key);
    } else if (_.isEqual(obj1[key], obj2[key])) {
      const resultKeyIndex = result.indexOf(key);
      result.splice(resultKeyIndex, 1);
    }
    return result;
  }, Object.keys(obj2));

  return diff;
}

var compare = function (a, b) {
  var result = {
    different: [],
    missing_from_first: [],
    missing_from_second: [],
  };

  _.reduce(
    a,
    function (result, value, key) {
      if (b.hasOwnProperty(key)) {
        if (_.isEqual(value, b[key])) {
          return result;
        } else {
          if (typeof a[key] != typeof {} || typeof b[key] != typeof {}) {
            //dead end.
            result.different.push(key);
            return result;
          } else {
            var deeper = compare(a[key], b[key]);
            result.different = result.different.concat(
              _.map(deeper.different, (sub_path) => {
                return key + "." + sub_path;
              })
            );

            result.missing_from_second = result.missing_from_second.concat(
              _.map(deeper.missing_from_second, (sub_path) => {
                return key + "." + sub_path;
              })
            );

            result.missing_from_first = result.missing_from_first.concat(
              _.map(deeper.missing_from_first, (sub_path) => {
                return key + "." + sub_path;
              })
            );
            return result;
          }
        }
      } else {
        result.missing_from_second.push(key);
        return result;
      }
    },
    result
  );

  _.reduce(
    b,
    function (result, value, key) {
      if (a.hasOwnProperty(key)) {
        return result;
      } else {
        result.missing_from_first.push(key);
        return result;
      }
    },
    result
  );

  return result;
};