import { Fragment, memo, useMemo } from 'react';

import { Icon } from '@iconify/react';
import { Dropdown, type MenuProps } from 'antd';
import { useTranslation } from 'react-i18next';

import logoUnion from '@/assets/iconify/multi-color/logo-union.svg';
import chevronDownIcon from '@/assets/iconify/single-color/chevron-down.svg';
import closeIcon from '@/assets/iconify/single-color/close.svg';
import menuIcon from '@/assets/iconify/single-color/menu.svg';
import { LanguageSwitch } from '@/components/LanguageSwitch';
import { useAuth } from '@/hooks/useAuth';
import { useLoginDialog } from '@/hooks/useLoginDialog';
import { useResponsive } from '@/hooks/useSize';
import type { NavMenuItem } from '@/utils/navUtils';

import { useAction } from './useAction';
import { useService } from './useService';

const Topbar = memo(() => {
    const { t } = useTranslation();
    const { isMobile } = useResponsive();
    const { menuItems, isActive, getMenuItemLabel } = useService();
    const { isLoggedIn } = useAuth();
    const openLoginDialog = useLoginDialog();
    const {
        menuContainerRef,
        loginButtonRef,
        languageButtonRef,
        isMobileMenuOpen,
        isMobileMenuClosing,
        isOverflowMenuOpen,
        visibleMenuItems,
        overflowMenuItems,
        handleMenuClick,
        toggleMobileMenu,
        closeMobileMenu,
        handleMenuAnimationEnd,
        setOverflowMenuOpen,
        setMenuItemRef,
    } = useAction({ menuItems, isMobile, isLoggedIn });

    const overflowMenuProps: MenuProps = useMemo(
        () => ({
            items: overflowMenuItems.map((item: NavMenuItem) => ({
                key: item.name,
                label: getMenuItemLabel(item),
                onClick: () => handleMenuClick(item.path),
            })),
        }),
        [overflowMenuItems, getMenuItemLabel, handleMenuClick]
    );

    return (
        <Fragment>
            <header className="fixed top-0 start-0 end-0 z-50 bg-black/90 border-b border-white/10 backdrop-blur-sm">
                <div className="flex items-center justify-between px-5 sm:px-6 lg:px-20 py-5 max-w-[1440px] mx-auto">
                    {/* Logo */}
                    <div className="flex-shrink-0 flex items-center gap-3">
                        <Icon icon={logoUnion} className="w-8 h-8" />
                        <h1 className="text-2xl font-bold italic text-white leading-none font-[REM] tracking-wide">
                            {t('components.topbar.logo')}
                        </h1>
                    </div>

                    {/* Desktop Menu */}
                    {!isMobile && (
                        <nav
                            ref={menuContainerRef}
                            className="flex-1 flex items-center justify-end gap-2.5 ms-8 min-w-0"
                        >
                            <div className="flex items-center gap-2.5 min-w-0">
                                {visibleMenuItems.map((item: NavMenuItem) => {
                                    const active = isActive(item.path);
                                    return (
                                        <button
                                            key={item.name}
                                            ref={setMenuItemRef(item.name)}
                                            onClick={() => handleMenuClick(item.path)}
                                            className={`px-2.5 h-10 flex items-center justify-center transition-colors text-base leading-6 border-none bg-transparent whitespace-nowrap ${
                                                active
                                                    ? 'font-bold text-[#0FA4E9] border-b-2 border-[#0FA4E9]'
                                                    : 'font-normal text-white/80 hover:text-white'
                                            }`}
                                        >
                                            {getMenuItemLabel(item)}
                                        </button>
                                    );
                                })}
                                {overflowMenuItems.length > 0 && (
                                    <Dropdown
                                        menu={overflowMenuProps}
                                        open={isOverflowMenuOpen}
                                        onOpenChange={setOverflowMenuOpen}
                                        overlayClassName="topbar-overflow-menu"
                                        trigger={['click']}
                                        placement="bottomRight"
                                    >
                                        <button
                                            type="button"
                                            className="px-2.5 h-10 flex items-center justify-center transition-colors text-base leading-6 border-none bg-transparent text-white/80 hover:text-white gap-1 whitespace-nowrap"
                                        >
                                            <span>...</span>
                                            <Icon
                                                icon={chevronDownIcon}
                                                className={`w-4 h-4 transition-transform ${
                                                    isOverflowMenuOpen ? 'rotate-180' : ''
                                                }`}
                                            />
                                        </button>
                                    </Dropdown>
                                )}
                            </div>

                            <div ref={languageButtonRef}>
                                <LanguageSwitch className="px-2.5 h-10 flex items-center justify-center transition-colors text-base leading-6 border-none bg-transparent font-normal text-white/80 hover:text-white whitespace-nowrap cursor-pointer" />
                            </div>

                            {!isLoggedIn && (
                                <button
                                    ref={loginButtonRef}
                                    type="button"
                                    onClick={() => openLoginDialog()}
                                    className="ms-2 px-4 h-10 rounded-full bg-[#0FA4E9] text-white text-base font-normal border-none hover:bg-[#0d93d1] transition-colors whitespace-nowrap"
                                >
                                    {t('components.topbar.login')}
                                </button>
                            )}
                        </nav>
                    )}

                    {/* Mobile Menu Button */}
                    {isMobile && (
                        <button
                            type="button"
                            onClick={toggleMobileMenu}
                            className="p-2 rounded-xl bg-white/20 border-none text-white outline-none focus:outline-none [-webkit-tap-highlight-color:transparent] transition-colors"
                            aria-label={isMobileMenuOpen ? 'Close menu' : 'Open menu'}
                        >
                            <Icon
                                icon={isMobileMenuOpen ? closeIcon : menuIcon}
                                className="w-6 h-6"
                            />
                        </button>
                    )}
                </div>
            </header>

            {/* Mobile Expanded Menu */}
            {isMobile && (isMobileMenuOpen || isMobileMenuClosing) && (
                <>
                    <div
                        className="fixed inset-0 bg-black/40 backdrop-blur-sm z-40 top-[81px]"
                        onClick={closeMobileMenu}
                    />
                    <nav
                        className={`fixed end-5 top-[81px] z-50 border border-white/[0.35] bg-black/85 rounded-lg origin-top ${
                            isMobileMenuClosing ? 'animate-collapse-up' : 'animate-expand-down'
                        }`}
                        onAnimationEnd={handleMenuAnimationEnd}
                    >
                        <div className="flex flex-col items-end gap-4 p-4">
                            {menuItems.map((item: NavMenuItem) => {
                                const active = isActive(item.path);
                                return (
                                    <button
                                        key={item.name}
                                        onClick={() => handleMenuClick(item.path)}
                                        className={`text-base leading-[1.5] transition-colors border-none bg-transparent whitespace-nowrap ${
                                            active
                                                ? 'font-bold text-white'
                                                : 'font-normal text-[#999] hover:text-white'
                                        }`}
                                    >
                                        {getMenuItemLabel(item)}
                                    </button>
                                );
                            })}
                            <LanguageSwitch className="text-base leading-[1.5] font-normal text-[#999] hover:text-white transition-colors border-none bg-transparent whitespace-nowrap cursor-pointer" />
                            {!isLoggedIn && (
                                <button
                                    type="button"
                                    onClick={() => {
                                        closeMobileMenu();
                                        openLoginDialog();
                                    }}
                                    className="text-base leading-[1.5] font-normal text-[#999] hover:text-white transition-colors border-none bg-transparent whitespace-nowrap"
                                >
                                    {t('components.topbar.login')}
                                </button>
                            )}
                        </div>
                    </nav>
                </>
            )}
        </Fragment>
    );
});

Topbar.displayName = 'Topbar';

export default Topbar;