'use client';

import { useCallback, useMemo, useState } from 'react';
import { Plus, Users } from 'lucide-react';

import { PageHeader } from '@/components/page-header';
import { Button } from '@/components/ui/button';
import { PERMISSIONS } from '@/constants/permissions';
import { PermissionGuard } from '@/guards';
import type { AdministrationUser } from '@/types';

import { useUserColumns } from './components/UserColumns';
import { UserFilters } from './components/UserFilters';
import { UserSheet } from './components/UserSheet';
import { UserStats } from './components/UserStats';
import { UserTable } from './components/UserTable';
import { useUserFilters } from './hooks/useUserFilters';
import { useUserForm } from './hooks/useUserForm';
import { useUserStatusMutation } from './hooks/useUserMutations';
import { useUsersQuery } from './hooks/useUserQueries';

export default function UsersPage() {
  const [isSheetOpen, setIsSheetOpen] = useState(false);
  const {
    skip,
    setSkip,
    limit,
    setLimit,
    sorting,
    setSorting,
    searchTerm,
    debouncedSearchTerm,
    setSearchTerm,
    statusFilter,
    setStatusFilter,
  } = useUserFilters();

  const usersQuery = useUsersQuery({
    skip,
    limit,
    searchTerm: debouncedSearchTerm,
    statusFilter,
    sorting,
  });
  const userForm = useUserForm({
    onSaved: () => setIsSheetOpen(false),
  });
  const {
    openCreate: prepareCreateUser,
    openEdit: prepareEditUser,
    register,
    handleSubmit,
    userId,
    roleId,
    setRoleId,
    errors,
    isSubmitted,
    canSubmit,
    isSaving,
  } = userForm;
  const statusMutation = useUserStatusMutation();
  const { mutate: updateUserStatus, pendingUserId } = statusMutation;

  const openCreate = useCallback(() => {
    prepareCreateUser();
    setIsSheetOpen(true);
  }, [prepareCreateUser]);

  const openEdit = useCallback(
    (user: AdministrationUser) => {
      prepareEditUser(user);
      setIsSheetOpen(true);
    },
    [prepareEditUser],
  );

  const toggleStatus = useCallback(
    (user: AdministrationUser) => {
      updateUserStatus(user);
    },
    [updateUserStatus],
  );

  const columns = useUserColumns();

  const total = usersQuery.data?.total ?? 0;
  const users = usersQuery.data?.items ?? [];
  const toolbar = useMemo(
    () => (
      <UserFilters
        searchTerm={searchTerm}
        statusFilter={statusFilter}
        onSearchChange={setSearchTerm}
        onStatusChange={setStatusFilter}
      />
    ),
    [searchTerm, setSearchTerm, setStatusFilter, statusFilter],
  );

  return (
    <>
      <main className="relative z-10 space-y-5">
        <PageHeader
          title="User Management"
          description="Manage users and role assignment"
          icon={Users}
          actions={
            <PermissionGuard permissions={PERMISSIONS.USER.CREATE}>
              <Button onClick={openCreate} size="sm">
                <Plus />
                Add User
              </Button>
            </PermissionGuard>
          }
        />

        <UserStats
          total={total}
          activeCount={usersQuery.data?.active_count ?? 0}
          inactiveCount={usersQuery.data?.inactive_count ?? 0}
          pendingCount={usersQuery.data?.pending_count ?? 0}
        />

        <UserTable
          columns={columns}
          users={users}
          isLoading={usersQuery.isLoading}
          toolbar={toolbar}
          skip={skip}
          limit={limit}
          total={total}
          sorting={sorting}
          onPageChange={setSkip}
          onLimitChange={setLimit}
          onSortingChange={setSorting}
          onEdit={openEdit}
          onToggleStatus={toggleStatus}
          pendingUserId={pendingUserId}
        />
      </main>

      <UserSheet
        open={isSheetOpen}
        onOpenChange={setIsSheetOpen}
        userId={userId}
        register={register}
        errors={errors}
        isSubmitted={isSubmitted}
        onSubmit={handleSubmit}
        roleId={roleId}
        onRoleChange={setRoleId}
        canSubmit={canSubmit}
        isSaving={isSaving}
      />
    </>
  );
}