import { useMutation } from "@apollo/client/react";
import { useState } from "react";
import { useTranslation } from "react-i18next";
import { logImEXEvent } from "../../firebase/firebase.utils";
import { UPDATE_JOB_ASSIGNMENTS } from "../../graphql/jobs.queries";
import JobEmployeeAssignmentsComponent from "./job-employee-assignments.component";

import { connect } from "react-redux";
import { createStructuredSelector } from "reselect";
import { insertAuditTrail } from "../../redux/application/application.actions";
import AuditTrailMapping from "../../utils/AuditTrailMappings";
import { useNotification } from "../../contexts/Notifications/notificationContext.jsx";

const mapStateToProps = createStructuredSelector({});
const mapDispatchToProps = (dispatch) => ({
  insertAuditTrail: ({ jobid, operation, type }) => dispatch(insertAuditTrail({ jobid, operation, type }))
});
export default connect(mapStateToProps, mapDispatchToProps)(JobEmployeeAssignmentsContainer);

export function JobEmployeeAssignmentsContainer({ job, refetch, insertAuditTrail }) {
  const { t } = useTranslation();
  const [updateJob] = useMutation(UPDATE_JOB_ASSIGNMENTS);
  const [loading, setLoading] = useState(false);
  const notification = useNotification();

  const handleAdd = async (assignment) => {
    const { operation, employeeid, name } = assignment;
    const empAssignment = determineFieldName(operation);

    if (!job?.id || !empAssignment || !employeeid) return;

    setLoading(true);
    try {
      logImEXEvent("job_assign_employee", { operation });

      const result = await updateJob({
        variables: { jobId: job.id, job: { [empAssignment]: employeeid } }
      });

      if (typeof refetch === "function") await refetch();

      if (!result.errors) {
        insertAuditTrail({
          jobid: job.id,
          operation: AuditTrailMapping.jobassignmentchange(operation, name),
          type: "jobassignmentchange"
        });
      } else {
        notification.error({
          title: t("jobs.errors.assigning", {
            message: JSON.stringify(result.errors)
          })
        });
      }
    } finally {
      setLoading(false);
    }
  };

  const handleRemove = async (operation) => {
    const empAssignment = determineFieldName(operation);
    if (!job?.id || !empAssignment) return;

    setLoading(true);
    try {
      logImEXEvent("job_unassign_employee", { operation });

      const result = await updateJob({
        variables: { jobId: job.id, job: { [empAssignment]: null } }
      });

      if (typeof refetch === "function") await refetch();

      if (!result.errors) {
        insertAuditTrail({
          jobid: job.id,
          operation: AuditTrailMapping.jobassignmentremoved(operation),
          type: "jobassignmentremoved"
        });
      } else {
        notification.error({
          title: t("jobs.errors.assigning", {
            message: JSON.stringify(result.errors)
          })
        });
      }
    } finally {
      setLoading(false);
    }
  };

  return (
    <div>
      <JobEmployeeAssignmentsComponent
        body={job.employee_body_rel}
        refinish={job.employee_refinish_rel}
        prep={job.employee_prep_rel}
        csr={job.employee_csr_rel}
        handleAdd={handleAdd}
        handleRemove={handleRemove}
        loading={loading}
      />
    </div>
  );
}

const determineFieldName = (operation) => {
  switch (operation) {
    case "body":
      return "employee_body";
    case "prep":
      return "employee_prep";
    case "csr":
      return "employee_csr";
    case "refinish":
      return "employee_refinish";
    default:
      return null;
  }
};