import React, { useCallback, useEffect, useState, useMemo } from "react";
import Avatar from "../common/Avatar";
import { convertShortTime } from "../../utils/dateUtils";
import RegularizationActions from "./RegularizationActions";
import { useSelector } from "react-redux";
import { useRegularizationRequests } from "../../hooks/useAttendance";
import moment from "moment";
import usePagination from "../../hooks/usePagination";
import eventBus from "../../services/eventBus";
import {
  cacheData,
  clearCacheKey,
  useSelectedProject,
} from "../../slices/apiDataManager";
import { useQueryClient } from "@tanstack/react-query";
import Pagination from "../../components/common/Pagination";

const Regularization = ({
  handleRequest,
  searchTerm,
  projectId,
  organizationId,
  IncludeInActive,
}) => {
  const queryClient = useQueryClient();
  // var selectedProject = useSelector((store) => store.localVariables.projectId);
  const selectedProject = useSelectedProject();
  const [regularizesList, setregularizedList] = useState([]);
  const { regularizes, loading, error, refetch } = useRegularizationRequests(
    selectedProject,
    organizationId,
    IncludeInActive
  );

  useEffect(() => {
    setregularizedList(regularizes);
  }, [regularizes]);

  const sortByName = (a, b) => {
    const nameA = a.firstName.toLowerCase() + a.lastName.toLowerCase();
    const nameB = b.firstName.toLowerCase() + b.lastName.toLowerCase();
    return nameA?.localeCompare(nameB);
  };

  const handler = useCallback(
    (msg) => {
      if (selectedProject == msg.projectId) {
        queryClient.setQueryData(
          ["regularizedList", selectedProject],
          (oldData) => {
            if (!oldData) {
              queryClient.invalidateQueries({ queryKey: ["regularizedList"] });
            }
            return oldData.filter((record) => record.id !== msg.response.id);
          }
        ),
          queryClient.invalidateQueries({ queryKey: ["attendanceLogs"] });
      }
    },
    [selectedProject, regularizes]
  );

  // Filter the data based on the search term and sort it
  const filteredSearchData = useMemo(() => {
    const sortedList = [...regularizesList].sort(sortByName);
    if (!searchTerm) {
      return sortedList;
    }
    const lowercasedSearchTerm = searchTerm.toLowerCase();
    return sortedList.filter((item) => {
      const fullName = `${item?.firstName} ${item?.lastName}`.toLowerCase();
      return fullName.includes(lowercasedSearchTerm);
    });
  }, [regularizesList, searchTerm]);

  const { currentPage, totalPages, currentItems, paginate } = usePagination(
    filteredSearchData,
    20
  );

  useEffect(() => {
    eventBus.on("regularization", handler);
    return () => eventBus.off("regularization", handler);
  }, [handler]);

  const employeeHandler = useCallback(
    (msg) => {
      if (regularizes.some((item) => item.employeeId == msg.employeeId)) {
        refetch();
      }
    },
    [regularizes]
  );

  useEffect(() => {
    eventBus.on("employee", employeeHandler);
    return () => eventBus.off("employee", employeeHandler);
  }, [employeeHandler]);

  return (
    <div
      className="table-responsive text-nowrap pb-4"
      style={{ minHeight: "200px" }}
    >
      {loading ? (
        <div
          className="d-flex justify-content-center align-items-center"
          style={{ height: "200px" }}
        >
          <p className="text-secondary">Loading...</p>
        </div>
      ) : currentItems?.length > 0 ? (
        <table className="table mb-0">
          <thead>
            <tr>
              <th colSpan={2}>Name</th>
              <th>Date</th>
              <th>Organization</th>
              <th>
                <i className="bx bxs-down-arrow-alt text-success"></i>Check-In
              </th>
              <th>
                <i className="bx bxs-up-arrow-alt text-danger"></i>Check-Out
              </th>
              <th>Action</th>
            </tr>
          </thead>
          <tbody>
            {currentItems?.map((att, index) => (
              <tr key={index}>
                <td colSpan={2}>
                  <div className="d-flex justify-content-start align-items-center">
                    <Avatar firstName={att.firstName} lastName={att.lastName} />
                    <div className="d-flex flex-column">
                      <a href="#" className="text-heading text-truncate">
                        <span className="fw-normal">
                          {att.firstName} {att.lastName}
                        </span>
                      </a>
                    </div>
                  </div>
                </td>
                <td>{moment(att.checkOutTime).format("DD-MMM-YYYY")}</td>

                <td>{att.organizationName || "--"}</td>

                <td>{convertShortTime(att.checkInTime)}</td>
                <td>
                  {att.checkOutTime ? convertShortTime(att.checkOutTime) : "--"}
                </td>
                <td className="text-center ">
                  <RegularizationActions
                    attendanceData={att}
                    handleRequest={handleRequest}
                    refresh={refetch}
                  />
                </td>
              </tr>
            ))}
          </tbody>
        </table>
      ) : (
        <div
          className="d-flex justify-content-center align-items-center"
          style={{ height: "200px" }}
        >
          <span className="text-secondary">
            {searchTerm
              ? "No results found for your search."
              : "No Requests Found !"}
          </span>
        </div>
      )}
      {/* {!loading && totalPages > 1 && (
        <nav aria-label="Page ">
          <ul className="pagination pagination-sm justify-content-end py-1 mt-3">
            <li className={`page-item  ${currentPage === 1 ? "disabled" : ""}`}>
              <button
                className="page-link btn-xs"
                onClick={() => paginate(currentPage - 1)}
              >
                &laquo;
              </button>
            </li>
            {[...Array(totalPages)].map((_, index) => (
              <li
                key={index}
                className={`page-item ${currentPage === index + 1 ? "active" : ""
                  }`}
              >
                <button
                  className="page-link "
                  onClick={() => paginate(index + 1)}
                >
                  {index + 1}
                </button>
              </li>
            ))}
            <li
              className={`page-item ${currentPage === totalPages ? "disabled" : ""
                }`}
            >
              <button
                className="page-link "
                onClick={() => paginate(currentPage + 1)}
              >
                &raquo;
              </button>
            </li>
          </ul>
        </nav>
      )} */}

      {totalPages > 0 && (
        <Pagination
          currentPage={currentPage}
          totalPages={totalPages}
          onPageChange={paginate}
        />
      )}
    </div>
  );
};

export default Regularization;