"use client";

import { usePathname } from "next/navigation";

interface PaginationProps {
  page: number;
  hasPreviousPage: boolean;
  hasNextPage: boolean;
  totalPages: number;
  usePathParams?: boolean;
}

export default function Pagination({
  page,
  hasPreviousPage,
  hasNextPage,
  totalPages,
  usePathParams = false,
}: PaginationProps) {
  const activePage = page;
  const pathName = usePathname();

  // Function to handle page change
  const handlePageChange = (page: string | number) => {
    if (typeof page === "string") return;
    if (typeof window === "undefined") return;
    const url = new URL(window.location.href);
    const searchParams = new URLSearchParams(url.search);

    if (usePathParams) {
      let updatedPath = "";
      if (pathName.includes("/page")) {
        updatedPath = pathName.replace(/\/page\/\d+/, `/page/${page}`);
      } else {
        updatedPath = `${pathName}/page/${page}`;
      }
      window.location.href = `${updatedPath}?${searchParams}`;
    } else {
      searchParams.set("page", `${page}`);
      window.location.href = `${pathName}/?${searchParams}`;
    }
  };

  const getPageNumbers = () => {
    const pages = [];
    const showEllipsisStart = activePage > 4;
    const showEllipsisEnd = activePage < totalPages - 3;

    if (totalPages <= 7) {
      // Show all pages if total is 7 or less
      for (let i = 1; i <= totalPages; i++) {
        pages.push(i);
      }
    } else {
      // Always show first page
      pages.push(1);

      if (showEllipsisStart) {
        pages.push("...");
      }

      // Show pages around current page
      const start = showEllipsisStart ? Math.max(2, activePage - 1) : 2;
      const end = showEllipsisEnd ? Math.min(totalPages - 1, activePage + 1) : totalPages - 1;

      for (let i = start; i <= end; i++) {
        pages.push(i);
      }

      if (showEllipsisEnd) {
        pages.push("...");
      }

      // Always show last page
      pages.push(totalPages);
    }

    return pages;
  };

  return (
    <ul className={"pagination-custom"}>
      {/* Previous Page Button */}
      {hasPreviousPage && (
        <>
          <li className="cursor-pointer">
            <a
              onClick={() => activePage > 1 && handlePageChange(activePage - 1)}
              className={activePage === 1 ? "disabled" : ""}
            >
              {"<"}
            </a>
          </li>
        </>
      )}

      {getPageNumbers().map((page, key) => (
        <li key={key} className="cursor-pointer">
          <a onClick={() => handlePageChange(page)} className={activePage === page ? "active" : ""}>
            {page}
          </a>
        </li>
      ))}

      {/* Next Page Button */}
      {hasNextPage && (
        <>
          <li className="cursor-pointer">
            <a
              onClick={() => activePage < totalPages && handlePageChange(activePage + 1)}
              className={activePage === totalPages ? "disabled" : ""}
            >
              {">"}
            </a>
          </li>
        </>
      )}
    </ul>
  );
}