import React, { useState, useEffect } from "react";
import ProjectCard from "../../components/Project/ProjectCard";
import ManageProjectInfo from "../../components/Project/ManageProjectInfo";
import Breadcrumb from "../../components/common/Breadcrumb";
import ProjectRepository from "../../repositories/ProjectRepository";
import { useProjects } from "../../hooks/useProjects";
import { useDispatch } from "react-redux";
import showToast from "../../services/toastService";
import {  getCachedData,  cacheData} from "../../slices/apiDataManager";
import {useHasUserPermission} from "../../hooks/useHasUserPermission"
import { useProfile } from "../../hooks/useProfile";
import {MANAGE_PROJECT} from "../../utils/constants";

const ProjectList = () =>
{

  const {profile: loginUser} = useProfile();
  const [showModal, setShowModal] = useState(false);
  const {projects, loading, error, refetch} = useProjects();
  const [refresh, setRefresh] = useState(false);
  const [ projectList, setProjectList ] = useState( [] );
  const HasManageProjectPermission = useHasUserPermission( MANAGE_PROJECT )
  const[HasManageProject,setHasManageProject] = useState(HasManageProjectPermission)
  const dispatch = useDispatch();
  const [currentPage, setCurrentPage] = useState(1);
  const [itemsPerPage] = useState(6);

    
    const handleShow = () => setShowModal(true);
    const handleClose = () => setShowModal( false );



  useEffect(() => {
    setProjectList( projects )
    
  }, [ projects, loginUser?.projects, loading ] );

  useEffect(() => {
    if (loginUser) {
      setHasManageProject(HasManageProjectPermission); 
    } else {
      setHasManageProject(false);     }
  }, [loginUser, HasManageProjectPermission]);
  


  const handleSubmitForm = (newProject) => {
    ProjectRepository.manageProject(newProject)
      .then( ( response ) =>
      {
       
        const cachedProjects_list = getCachedData( "projectslist" ) || [];
        
        const updated_Projects_list = [ ...cachedProjects_list, response.data ];
        
        cacheData("projectslist", updated_Projects_list);
        setProjectList((prevProjectList) => [...prevProjectList, response.data]);

        showToast("Project Created successfully.", "success");
        setShowModal(false)
      })
      .catch((error) => {
        closeModal();
        showToast(error.message, "error");
      });
  };

  const handleReFresh = () => {
    if (!projects || projects.length === 0) {
      refetch();
    }
    setRefresh((prev) => !prev);
  };

  const indexOfLastItem = currentPage * itemsPerPage;
  const indexOfFirstItem = indexOfLastItem - itemsPerPage;
  const currentItems =   Array.isArray(projectList)
  ? projectList.slice(indexOfFirstItem, indexOfLastItem)
    : [];
  
  const paginate = (pageNumber) => setCurrentPage(pageNumber);
  const totalPages = Array.isArray(projectList)
    ? Math.ceil(projectList.length / itemsPerPage)
    : 0;


  return (
    <>
      <div
        className={`modal fade ${showModal ? 'show' : ''}`}
        tabIndex="-1"
        role="dialog"
        style={{ display: showModal ? 'block' : 'none' }}
        aria-hidden={!showModal}
      >
          <ManageProjectInfo
            project={null}
            handleSubmitForm={handleSubmitForm}
            onClose={handleClose}
          ></ManageProjectInfo>
        </div>
     
      <div className="container-xxl flex-grow-1 container-p-y">
        <Breadcrumb
          data={[
            { label: "Home", link: "/dashboard" },
            { label: "Projects", link: null },
          ]}
        ></Breadcrumb>

        <div className="row">
          <div
            className={`col-md-12 col-lg-12 col-xl-12 order-0 mb-4 ${
              !error && !projects ? "text-center" : "text-end"
            }`}
          >
            {" "}
            <button
              type="button"
              className={`btn btn-sm btn-primary ${!HasManageProject && 'd-none' }`}
              data-bs-toggle="modal"
              data-bs-target="#create-project-model"
              onClick={handleShow}
            >
              <i className="bx bx-plus-circle me-2"></i>
              Create New Project
            </button>
          </div>
        </div>

        {((error && !loading) || !projects) && (
          <p className="text-center text-body-secondary">
            There was an error loading the projects. Please try again.
          </p>
        )}

        {(!projects || projects.length === 0 || projectList.length == 0) &&
          !loading &&
          error && (
            <div className="text-center">
              <button
                className="btn btn-xs btn-label-secondary"
                onClick={handleReFresh}
              >
                Retry Fetching Projects
              </button>
            </div>
          )}

        <div className="row">
          {loading && <p className="text-center">Loading...</p>}
          {currentItems &&
            currentItems.sort((a, b) => b.id - a.id).map((item) => (
              <ProjectCard projectData={item} key={item.id}></ProjectCard>
            ))}
        </div>
           {/* Pagination */}
           {!loading && (
                  <nav aria-label="Page ">
                    <ul className="pagination pagination-sm justify-content-end py-1">
                      <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>
            )}
      </div>
    </>
  );
};

export default ProjectList;