import React, { createContext, useContext, useEffect, useState } from "react";
import Breadcrumb from "../../components/common/Breadcrumb";
import {
  ITEMS_PER_PAGE,
  MANAGE_PROJECT,
  PROJECT_STATUS,
} from "../../utils/constants";
import ProjectListView from "../../components/Project/ProjectListView";
import GlobalModel from "../../components/common/GlobalModel";
import ManageProjectInfo from "../../components/Project/ManageProjectInfo";
import ProjectCardView from "../../components/Project/ProjectCardView";
import usePagination from "../../hooks/usePagination";
import { useProjects } from "../../hooks/useProjects";
import Loader from "../../components/common/Loader";
import { useHasUserPermission } from "../../hooks/useHasUserPermission";

const ProjectContext = createContext();
export const useProjectContext = () => {
  const context = useContext(ProjectContext);
  if (!context) {
    throw new Error("useProjectContext must be used within an ProjectProvider");
  }
  return context;
};

const ProjectPage = () => {
  const [manageProject, setMangeProject] = useState({
    isOpen: false,
    Project: null,
  });

  const [projectList, setProjectList] = useState([]);
  const [listView, setListView] = useState(false);
  const [searchTerm, setSearchTerm] = useState("");
  const HasManageProject = useHasUserPermission(MANAGE_PROJECT);

  const [selectedStatuses, setSelectedStatuses] = useState(
    PROJECT_STATUS.map((s) => s.id)
  );

  const { data, isLoading, isError, error } = useProjects();

  const contextDispatcher = {
    setMangeProject,
  };

  const filteredProjects = projectList.filter((project) => {
    const matchesStatus = selectedStatuses.includes(project.projectStatusId);
    const matchesSearch = project.name
      .toLowerCase()
      .includes(searchTerm.toLowerCase());
    return matchesStatus && matchesSearch;
  });

  const totalPages = Math.ceil(filteredProjects.length / ITEMS_PER_PAGE);

  const { currentItems, currentPage, paginate, setCurrentPage } = usePagination(
    filteredProjects,
    ITEMS_PER_PAGE
  );

  const handleStatusChange = (statusId) => {
    setCurrentPage(1);
    setSelectedStatuses((prev) =>
      prev.includes(statusId)
        ? prev.filter((id) => id !== statusId)
        : [...prev, statusId]
    );
  };

  const sortingProject = (projects) => {
    if (!isLoading && Array.isArray(projects)) {
      const grouped = {};

      projects.forEach((project) => {
        const statusId = project.projectStatusId;
        if (!grouped[statusId]) grouped[statusId] = [];
        grouped[statusId].push(project);
      });

      const sortedGrouped = selectedStatuses
        .filter((statusId) => grouped[statusId])
        .flatMap((statusId) =>
          grouped[statusId].sort((a, b) =>
            a.name.toLowerCase().localeCompare(b.name.toLowerCase())
          )
        );

      setProjectList((prev) => {
        const isSame = JSON.stringify(prev) === JSON.stringify(sortedGrouped);
        return isSame ? prev : sortedGrouped;
      });
    }
  };

  useEffect(() => {
    if (!isLoading && data) {
      sortingProject(data);
    }
  }, [data, isLoading, selectedStatuses]);

  if (isLoading)
    return (
      <div className="page-min-h">
        <Loader />
      </div>
    );
  if (isError)
    return (
      <div className="page-min-h d-flex justify-content-center align-items-center">
        <p>{error.message}</p>
      </div>
    );
  return (
    <ProjectContext.Provider value={contextDispatcher}>
      <div className="container-fluid">
        <Breadcrumb
          data={[
            { label: "Home", link: "/dashboard" },
            { label: "Projects", link: null },
          ]}
        />

        <div className="card cursor-pointer mb-5">
          <div className="card-body p-2 pb-1">
            <div className="d-flex flex-wrap justify-content-between align-items-start">
              <div className="d-flex flex-wrap align-items-start">
                <div className="flex-grow-1 me-2 mb-2">
                  <input
                    type="search"
                    className="form-control form-control-sm"
                    placeholder="Search projects..."
                    value={searchTerm}
                    onChange={(e) => {
                      setSearchTerm(e.target.value);
                      setCurrentPage(1);
                    }}
                  />
                </div>

                <div className="d-flex gap-2 mb-2">
                  <button
                    type="button"
                    className={`btn  btn-sm p-1 ${
                      !listView ? "btn-primary" : "btn-outline-primary"
                    }`}
                    onClick={() => setListView(false)}
                    data-bs-toggle="tooltip"
                    data-bs-custom-class="tooltip"
                    title="Card View"
                  >
                    <i className="bx bx-grid-alt fs-5"></i>
                  </button>
                  <button
                    type="button"
                    className={`btn btn-sm p-1  ${
                      listView ? "btn-primary" : "btn-outline-primary"
                    }`}
                    onClick={() => setListView(true)}
                    data-bs-toggle="tooltip"
                    data-bs-custom-class="tooltip"
                    title="List View"
                  >
                    <i className="bx bx-list-ul fs-5"></i>
                  </button>
                </div>

                <div className="dropdown mt-1">
                  <a
                    className="dropdown-toggle hide-arrow cursor-pointer p-1 mt-3 "
                    data-bs-toggle="dropdown"
                    aria-expanded="false"
                    data-bs-custom-class="tooltip"
                    title="Filter"
                  >
                    <i className="bx bx-slider-alt ms-1"></i>
                  </a>
                  <ul className="dropdown-menu p-2 text-capitalize">
                    {PROJECT_STATUS.map(({ id, label }) => (
                      <li key={id}>
                        <div className="form-check">
                          <input
                            className="form-check-input  "
                            type="checkbox"
                            checked={selectedStatuses.includes(id)}
                            onChange={() => handleStatusChange(id)}
                          />
                          <label className="form-check-label">{label}</label>
                        </div>
                      </li>
                    ))}
                  </ul>
                </div>
              </div>

              <div>
                {/* {HasManageProject && (  */}
                <button
                  className="btn btn-sm btn-primary"
                  type="button"
                  onClick={() =>
                    setMangeProject({ isOpen: true, Project: null })
                  }
                >
                  <i className="bx bx-plus-circle me-2"></i>
                  <span className="d-none d-md-inline-block">
                    Add New Project
                  </span>
                </button>
                {/* )} */}
              </div>
            </div>
          </div>
        </div>

        {/* Project Render here */}
        {listView ? (
          <ProjectListView
            currentItems={currentItems}
            selectedStatuses={selectedStatuses}
            handleStatusChange={handleStatusChange}
            setCurrentPage={setCurrentPage}
            totalPages={totalPages}
            isLoading={isLoading}
          />
        ) : (
          <ProjectCardView
            currentItems={currentItems}
            setCurrentPage={setCurrentPage}
            totalPages={totalPages}
          />
        )}

        {/* ------------------ */}

        {/* Project Manage UPdate or create */}

        {manageProject.isOpen && (
          <GlobalModel
            isOpen={manageProject.isOpen}
            closeModal={() => setMangeProject({ isOpen: false, Project: null })}
          >
            <ManageProjectInfo
              project={manageProject.Project}
              onClose={() => setMangeProject({ isOpen: false, Project: null })}
            />
          </GlobalModel>
        )}
      </div>
    </ProjectContext.Provider>
  );
};

export default ProjectPage;