'use client';

import { useState } from 'react';
import { useSession, signOut } from 'next-auth/react';
import Link from 'next/link';
import { useRouter } from 'next/navigation';
import { User, Upload, Users, LogIn, UserPlus } from 'lucide-react';
import { Button } from '@/components/ui/button';
import {
  Popover,
  PopoverContent,
  PopoverTrigger,
} from '@/components/ui/popover';
import {
  Tooltip,
  TooltipContent,
  TooltipTrigger,
} from '@/components/ui/tooltip';
import { LoginDialog } from '@/components/LoginDialog';
import { RegisterDialog } from '@/components/RegisterDialog';
import { ManageUsersPageClient } from '@/app/admin/users/ManageUsersPageClient';

function UserMenu() {
  const { data: session, status } = useSession();
  const router = useRouter();
  const [loginDialogOpen, setLoginDialogOpen] = useState(false);
  const [registerDialogOpen, setRegisterDialogOpen] = useState(false);
  const [manageUsersOpen, setManageUsersOpen] = useState(false);
  const [popoverOpen, setPopoverOpen] = useState(false);

  const handleSignOut = async () => {
    // Close any overlays tied to the authenticated state (e.g. Manage Users)
    // *before* the session clears, otherwise their effects/portals can unmount
    // mid-transition and throw (issue #57).
    setPopoverOpen(false);
    setManageUsersOpen(false);
    try {
      await signOut({ callbackUrl: '/' });
    } catch (error) {
      console.error('[SIGN_OUT] Failed to sign out cleanly:', error);
      router.push('/');
    }
  };

  if (status === 'loading') {
    return <div className="h-9 w-9 animate-pulse rounded-full bg-gray-200 dark:bg-gray-700" />;
  }

  if (session?.user) {
    return (
      <>
        <Tooltip>
          <TooltipTrigger asChild>
            <Button 
              variant="ghost" 
              size="icon" 
              asChild
              className="bg-blue-100 hover:bg-blue-200 dark:bg-blue-900 dark:hover:bg-blue-800"
            >
              <Link href="/upload" aria-label="Upload Photos">
                <Upload className="h-5 w-5" />
              </Link>
            </Button>
          </TooltipTrigger>
          <TooltipContent>
            <p>Upload your own photos</p>
          </TooltipContent>
        </Tooltip>
        <Popover open={popoverOpen} onOpenChange={setPopoverOpen}>
          <PopoverTrigger asChild>
            <Button
              variant="ghost"
              size="icon"
              className="h-9 w-9 rounded-full"
              aria-label="Account menu"
            >
              <User className="h-5 w-5 text-orange-600" />
            </Button>
          </PopoverTrigger>
          <PopoverContent className="w-56 p-2 z-[110]" align="end">
            <div className="space-y-1">
              <div className="px-2 py-1.5">
                <p className="text-sm font-medium text-secondary">
                  {session.user.name || 'User'}
                </p>
                <p className="text-xs text-muted-foreground">
                  {session.user.email}
                </p>
              </div>
              <div className="border-t pt-1">
                <Button
                  variant="ghost"
                  className="w-full justify-start text-sm text-secondary hover:text-secondary hover:bg-secondary/10"
                  onClick={() => {
                    setPopoverOpen(false);
                    router.push('/upload');
                  }}
                >
                  <Upload className="mr-2 h-4 w-4" />
                  Upload Photos
                </Button>
                {session.user.isAdmin && (
                  <Button
                    variant="ghost"
                    className="w-full justify-start text-sm text-secondary hover:text-secondary hover:bg-secondary/10"
                    onClick={() => {
                      setPopoverOpen(false);
                      setManageUsersOpen(true);
                    }}
                  >
                    <Users className="mr-2 h-4 w-4" />
                    Manage Users
                  </Button>
                )}
                <Button
                  variant="ghost"
                  className="w-full justify-start text-sm text-secondary hover:text-secondary hover:bg-secondary/10"
                  onClick={() => {
                    setPopoverOpen(false);
                    handleSignOut();
                  }}
                >
                  Sign out
                </Button>
              </div>
            </div>
          </PopoverContent>
        </Popover>
        {manageUsersOpen && (
          <ManageUsersPageClient onClose={() => setManageUsersOpen(false)} />
        )}
      </>
    );
  }

  return (
    <>
      <Button
        variant="ghost"
        size="sm"
        onClick={() => setLoginDialogOpen(true)}
        className="flex items-center gap-2"
      >
        <LogIn className="h-4 w-4" />
        <span className="hidden sm:inline">Sign in</span>
      </Button>
      <Button
        size="sm"
        onClick={() => setRegisterDialogOpen(true)}
        className="flex items-center gap-2"
      >
        <UserPlus className="h-4 w-4" />
        <span className="hidden sm:inline">Sign up</span>
      </Button>
      <LoginDialog
        open={loginDialogOpen}
        onOpenChange={(open) => {
          setLoginDialogOpen(open);
        }}
        onOpenRegister={() => {
          setLoginDialogOpen(false);
          setRegisterDialogOpen(true);
        }}
      />
      <RegisterDialog
        open={registerDialogOpen}
        onOpenChange={(open) => {
          setRegisterDialogOpen(open);
        }}
        onOpenLogin={() => {
          setRegisterDialogOpen(false);
          setLoginDialogOpen(true);
        }}
      />
    </>
  );
}

export default UserMenu;