import React, { useState } from "react";
import {
  useDocumentDetails,
  useDocumentVersionList,
  useVerifyDocument,
} from "../../hooks/useDocument";
import { getDocuementsStatus, useDocumentContext } from "./Documents";
import { formatUTCToLocalTime } from "../../utils/dateUtils";
import Avatar from "../common/Avatar";
import {
  DOWNLOAD_DOCUMENT,
  ITEMS_PER_PAGE,
  VERIFY_DOCUMENT,
} from "../../utils/constants";
import Pagination from "../common/Pagination";
import VersionListSkeleton from "./VersionListSkeleton";
import DocumentDetailsSkeleton from "./DocumentDetailsSkeleton ";
import { useHasUserPermission } from "../../hooks/useHasUserPermission";

const ViewDocument = () => {
  const { viewDoc, setViewDoc, setOpenDocument } = useDocumentContext();
  const [currentPage, setCurrentPage] = useState(1);
  const canVerifyDocument = useHasUserPermission(VERIFY_DOCUMENT);
  const canDownloadDocument = useHasUserPermission(DOWNLOAD_DOCUMENT);
  const { data, isLoading, isError, error } = useDocumentDetails(
    viewDoc?.document
  );
  const {
    data: versionList,
    isError: isVersionError,
    isLoading: versionLoding,
    error: versionError,
  } = useDocumentVersionList(
    data?.parentAttachmentId,
    ITEMS_PER_PAGE,
    currentPage
  );
  const paginate = (page) => {
    if (page >= 1 && page <= (versionList?.totalPages ?? 1)) {
      setCurrentPage(page);
    }
  };

  const { mutate: VerifyDoc, isPending } = useVerifyDocument();
  const VerifyDocument = () => {
    VerifyDoc({ documentId: viewDoc?.document, isVerify: true });
  };

  if (isLoading) return <DocumentDetailsSkeleton />;
  if (isError)
    return (
      <div>
        <p>{error?.response?.data?.message || error?.message}</p>
        <p className="danger-text">{error?.response?.status}</p>
      </div>
    );
  return (
    <div className="p-1">
      <p className="fw-bold fs-6">Document Details</p>

      <div className="row mb-2">
        <div className="col-12 col-md-6">
          <div className="d-flex text-start">
            <span className="fw-semibold me-2" style={{ minWidth: "130px" }}>
              Document Name:
            </span>
            <span className="text-muted">{data.name || "-"}</span>
          </div>
        </div>
        <div className="col-12 col-md-6">
          <div className="d-flex text-start">
            <span className="fw-semibold me-2" style={{ minWidth: "130px" }}>
              Document ID:
            </span>
            <span className="text-muted">{data.documentId || "-"}</span>
          </div>
        </div>
      </div>

      {/* Row 2 */}
      <div className="row mb-2">
        <div className="col-12 col-md-6 text-start">
          <div className="d-flex">
            <span className="fw-semibold me-2" style={{ minWidth: "130px" }}>
              Version:
            </span>
            <span className="text-muted">{data.version || "-"}</span>
          </div>
        </div>
        <div className="col-12 col-md-6 text-start">
          <div className="d-flex">
            <span className="fw-semibold me-2" style={{ minWidth: "130px" }}>
              Uploaded At:
            </span>
            <span className="text-muted">
              {formatUTCToLocalTime(data.uploadedAt)}
            </span>
          </div>
        </div>
      </div>

      {/* Row 3 */}
      <div className="row mb-2 text-start">
        <div className="col-12 col-md-6">
          <div className="d-flex">
            <span className="fw-semibold me-2" style={{ minWidth: "130px" }}>
              Uploaded By:
            </span>
            <span className="text-muted">
              {data.uploadedBy?.firstName || "-"}
            </span>
          </div>
        </div>
        <div className="col-12 col-md-6">
          <div className="d-flex">
            <span className="fw-semibold me-2" style={{ minWidth: "130px" }}>
              Updated At:
            </span>
            <span className="text-muted">
              {formatUTCToLocalTime(data.updatedAt) || "-"}
            </span>
          </div>
        </div>
      </div>

      {/* Row 4 */}
      <div className="row mb-2 text-start">
        <div className="col-12 col-md-6">
          <div className="d-flex">
            <span className="fw-semibold me-2" style={{ minWidth: "130px" }}>
              Category:
            </span>
            <span className="text-muted">
              {data.documentType?.documentCategory?.name || "-"}
            </span>
          </div>
        </div>
        <div className="col-12 col-md-6">
          <div className="d-flex">
            <span className="fw-semibold me-2" style={{ minWidth: "130px" }}>
              Type:
            </span>
            <span className="text-muted">{data.documentType?.name || "-"}</span>
          </div>
        </div>
      </div>

      {/* Row 5 - Tags full width */}
      <div className="row mb-2 text-start">
        <div className="col-12">
          <div className="d-flex">
            <span className="fw-semibold me-2" style={{ minWidth: "130px" }}>
              Tags:
            </span>
            <div className="d-flex flex-wrap gap-2">
              {data.tags?.length > 0 ? (
                data.tags.map((t, i) => (
                  <span
                    key={i}
                    className="badge rounded-pill bg-label-secondary"
                  >
                    {t.name}
                  </span>
                ))
              ) : (
                <span className="text-muted">-</span>
              )}
            </div>
          </div>
        </div>
      </div>

      {/* Row 6 - Description full width */}
      <div className="row mb-2 text-start">
        <div className="col-12">
          <div className="d-flex">
            <span className="fw-semibold me-2" style={{ minWidth: "130px" }}>
              Description:
            </span>
            <span className="text-muted">{data.description || "-"}</span>
          </div>
        </div>
      </div>

      <div className="row text-start py-2">
        <p className="m-0  fw-semibold : ">Documents</p>
        {versionLoding && <VersionListSkeleton items={2} />}
        {!versionLoding && (
          <div className="list-group mx-0">
            {versionList?.data.map((document) => (
              <a
                className="list-group-item list-group-item-action  py-1  border border-bottom border-top-0 border-start-0 border-end-0"
                key={document.id}
              >
                <div className="d-flex w-100 justify-content-between m-0">
                  <p className="m-0">
                    {document.name}{" "}
                    <em className="text-secondary ms-3">
                      {formatUTCToLocalTime(document?.uploadedAt)}
                    </em>
                  </p>
                  <div className="d-flex align-items-center gap-1">
                    <small>Version {document.version}</small>
                    <small>{getDocuementsStatus(document.isVerified)}</small>
                  </div>
                </div>
                <div className="d-flex align-items-center justify-content-between text-secondary">
                  <div className="d-flex align-items-center">
                    Upload By
                    <Avatar
                      size="xs"
                      classAvatar="m-0"
                      firstName={document.uploadedBy?.firstName}
                      lastName={document.uploadedBy?.lastName}
                    />
                    <span className="text-truncate m-0 ">
                      {`${document.uploadedBy?.firstName ?? ""} ${
                        document.uploadedBy?.lastName ?? ""
                      }`.trim() || "N/A"}
                    </span>
                  </div>
                  <div className="d-flex text-primary align-items-center gap-2 ">
                    {document.isVerified == null &&
                      canVerifyDocument &&
                      (isPending ? (
                        <div
                          class="spinner-border spinner-border-sm text-primary"
                          role="status"
                        >
                          <span class="visually-hidden">Loading...</span>
                        </div>
                      ) : (
                        <span
                          className="cursor-pointer"
                          onClick={VerifyDocument}
                        >
                          verify
                        </span>
                      ))}
                    {canDownloadDocument && (
                      <span
                        className="cursor-pointer text-decoration-underline"
                        onClick={() => setOpenDocument(true)}
                      >
                        <small>view</small>{" "}
                        <i className="bx bx-sm bx-link-external"></i>
                      </span>
                    )}
                  </div>
                </div>
              </a>
            ))}
          </div>
        )}
        {!versionLoding && versionList?.data?.length > 0 && (
          <Pagination
            currentPage={currentPage}
            totalPages={versionList?.totalPages}
            onPageChange={paginate}
          />
        )}
      </div>
    </div>
  );
};

export default ViewDocument;