'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, LogIn, UserPlus, Users, Home, Upload } 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';

export function Header() {
  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 () => {
    await signOut({ callbackUrl: '/' });
  };

  return (
    <header className="sticky top-0 z-50 w-full border-b bg-background/95 backdrop-blur supports-[backdrop-filter]:bg-background/60">
      <div className="w-full flex h-16 items-center justify-between px-4">
        <div className="flex items-center space-x-3">
          {/* Home button - commented out for future use */}
          {/* <Tooltip>
            <TooltipTrigger asChild>
              <Button 
                variant="default" 
                size="icon" 
                asChild
                className="bg-primary hover:bg-primary/90 rounded-lg"
              >
                <Link href="/" aria-label="Home">
                  <Home className="h-5 w-5" />
                </Link>
              </Button>
            </TooltipTrigger>
            <TooltipContent>
              <p>Go to Home</p>
            </TooltipContent>
          </Tooltip> */}
        </div>

        <div className="flex items-center gap-2">
          {session?.user && (
            <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>
          )}
          {status === 'loading' ? (
            <div className="h-9 w-9 animate-pulse rounded-full bg-gray-200 dark:bg-gray-700" />
          ) : session?.user ? (
            <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" 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>
          ) : (
            <div className="flex items-center gap-2">
              <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>
            </div>
          )}
        </div>
      </div>
      <LoginDialog
        open={loginDialogOpen}
        onOpenChange={(open) => {
          setLoginDialogOpen(open);
        }}
        onOpenRegister={() => {
          setLoginDialogOpen(false);
          setRegisterDialogOpen(true);
        }}
      />
      <RegisterDialog
        open={registerDialogOpen}
        onOpenChange={(open) => {
          setRegisterDialogOpen(open);
        }}
        onOpenLogin={() => {
          setRegisterDialogOpen(false);
          setLoginDialogOpen(true);
        }}
      />
      {manageUsersOpen && (
        <ManageUsersPageClient onClose={() => setManageUsersOpen(false)} />
      )}
    </header>
  );
}