'use client';

import { Fragment, useState, useEffect, useRef } from 'react';
import { Combobox, Dialog, Transition } from '@headlessui/react';
import { MagnifyingGlassIcon } from '@heroicons/react/24/outline';
import { useRouter } from 'next/navigation';
import {
    HomeIcon,
    BuildingOfficeIcon,
    LinkIcon,
    Cog6ToothIcon,
    PlusIcon,
    DocumentTextIcon,
    ArrowRightIcon
} from '@heroicons/react/24/outline';

interface CommandPaletteProps {
    isOpen: boolean;
    setIsOpen: (isOpen: boolean) => void;
}

export default function CommandPalette({ isOpen, setIsOpen }: CommandPaletteProps) {
    const [query, setQuery] = useState('');
    const router = useRouter();
    const inputRef = useRef<HTMLInputElement>(null);

    // Atalho de teclado (Ctrl+K ou Cmd+K)
    useEffect(() => {
        const onKeydown = (event: KeyboardEvent) => {
            if (event.key === 'k' && (event.metaKey || event.ctrlKey)) {
                event.preventDefault();
                setIsOpen(true);
            }
        };
        window.addEventListener('keydown', onKeydown);
        return () => {
            window.removeEventListener('keydown', onKeydown);
        };
    }, [setIsOpen]);

    const navigation = [
        { name: 'Dashboard', href: '/superadmin', icon: HomeIcon, category: 'Navegação' },
        { name: 'Agências', href: '/superadmin/agencies', icon: BuildingOfficeIcon, category: 'Navegação' },
        { name: 'Templates', href: '/superadmin/signup-templates', icon: LinkIcon, category: 'Navegação' },
        { name: 'Templates de Agência', href: '/superadmin/agency-templates', icon: DocumentTextIcon, category: 'Navegação' },
        { name: 'Configurações', href: '/superadmin/settings', icon: Cog6ToothIcon, category: 'Navegação' },
        { name: 'Nova Agência', href: '/superadmin/agencies/new', icon: PlusIcon, category: 'Ações' },
        { name: 'Novo Template', href: '/superadmin/signup-templates/new', icon: PlusIcon, category: 'Ações' },
    ];

    const filteredItems =
        query === ''
            ? navigation
            : navigation.filter((item) => {
                return item.name.toLowerCase().includes(query.toLowerCase());
            });

    // Agrupar itens por categoria
    const groups = filteredItems.reduce((acc, item) => {
        if (!acc[item.category]) {
            acc[item.category] = [];
        }
        acc[item.category].push(item);
        return acc;
    }, {} as Record<string, typeof filteredItems>);

    const handleSelect = (item: typeof navigation[0] | null) => {
        if (!item) return;
        setIsOpen(false);
        router.push(item.href);
        setQuery('');
    };

    return (
        <Transition.Root show={isOpen} as={Fragment} afterLeave={() => setQuery('')}>
            <Dialog as="div" className="relative z-50" onClose={setIsOpen} initialFocus={inputRef}>
                <Transition.Child
                    as={Fragment}
                    enter="ease-out duration-300"
                    enterFrom="opacity-0"
                    enterTo="opacity-100"
                    leave="ease-in duration-200"
                    leaveFrom="opacity-100"
                    leaveTo="opacity-0"
                >
                    <div className="fixed inset-0 bg-zinc-900/40 backdrop-blur-sm transition-opacity" />
                </Transition.Child>

                <div className="fixed inset-0 z-10 overflow-y-auto p-4 sm:p-6 md:p-20">
                    <Transition.Child
                        as={Fragment}
                        enter="ease-out duration-300"
                        enterFrom="opacity-0 scale-95"
                        enterTo="opacity-100 scale-100"
                        leave="ease-in duration-200"
                        leaveFrom="opacity-100 scale-100"
                        leaveTo="opacity-0 scale-95"
                    >
                        <Dialog.Panel className="mx-auto max-w-2xl transform overflow-hidden rounded-xl bg-white dark:bg-zinc-900 shadow-2xl transition-all">
                            <Combobox onChange={handleSelect}>
                                <div className="relative">
                                    <MagnifyingGlassIcon
                                        className="pointer-events-none absolute left-4 top-3.5 h-5 w-5 text-zinc-400"
                                        aria-hidden="true"
                                    />
                                    <Combobox.Input
                                        ref={inputRef}
                                        className="h-12 w-full border-0 bg-transparent pl-11 pr-4 text-zinc-900 dark:text-white placeholder:text-zinc-400 focus:ring-0 sm:text-sm font-medium"
                                        placeholder="O que você procura?"
                                        onChange={(event) => setQuery(event.target.value)}
                                        displayValue={(item: any) => item?.name}
                                        autoComplete="off"
                                    />
                                </div>

                                {filteredItems.length > 0 && (
                                    <Combobox.Options static className="max-h-[60vh] scroll-py-2 overflow-y-auto py-2 text-sm text-zinc-800 dark:text-zinc-200">
                                        {Object.entries(groups).map(([category, items]) => (
                                            <div key={category}>
                                                <div className="px-4 py-2 text-[10px] font-bold text-zinc-400 uppercase tracking-wider bg-zinc-50/50 dark:bg-zinc-800/50 mt-2 first:mt-0 mb-1">
                                                    {category}
                                                </div>
                                                {items.map((item) => (
                                                    <Combobox.Option
                                                        key={item.href}
                                                        value={item}
                                                        className={({ active }) =>
                                                            `cursor-pointer select-none px-4 py-2.5 transition-colors ${active
                                                                ? '[background:var(--gradient)] text-white'
                                                                : ''
                                                            }`
                                                        }
                                                    >
                                                        {({ active }) => (
                                                            <div className="flex items-center gap-3">
                                                                <div className={`flex h-8 w-8 items-center justify-center rounded-md ${active
                                                                    ? 'bg-white/20 text-white'
                                                                    : 'bg-zinc-50 dark:bg-zinc-900 text-zinc-400'
                                                                    }`}>
                                                                    <item.icon
                                                                        className="h-4 w-4"
                                                                        aria-hidden="true"
                                                                    />
                                                                </div>
                                                                <span className={`flex-auto truncate font-medium ${active ? 'text-white' : 'text-zinc-600 dark:text-zinc-400'}`}>
                                                                    {item.name}
                                                                </span>
                                                                {active && (
                                                                    <ArrowRightIcon className="h-4 w-4 text-white/70" />
                                                                )}
                                                            </div>
                                                        )}
                                                    </Combobox.Option>
                                                ))}
                                            </div>
                                        ))}
                                    </Combobox.Options>
                                )}

                                {query !== '' && filteredItems.length === 0 && (
                                    <div className="py-14 px-6 text-center text-sm sm:px-14">
                                        <MagnifyingGlassIcon className="mx-auto h-6 w-6 text-zinc-400" aria-hidden="true" />
                                        <p className="mt-4 font-semibold text-zinc-900 dark:text-white">Nenhum resultado encontrado</p>
                                        <p className="mt-2 text-zinc-500">Não conseguimos encontrar nada para &quot;{query}&quot;. Tente buscar por páginas ou ações.</p>
                                    </div>
                                )}

                                <div className="flex items-center justify-between px-4 py-3 bg-zinc-50 dark:bg-zinc-900/50">
                                    <div className="flex gap-4 text-[10px] text-zinc-500 font-medium">
                                        <span className="flex items-center gap-1.5">
                                            <kbd className="flex h-5 w-5 items-center justify-center rounded bg-white font-sans text-xs text-zinc-400 dark:bg-zinc-800">↵</kbd>
                                            Selecionar
                                        </span>
                                        <span className="flex items-center gap-1.5">
                                            <kbd className="flex h-5 w-5 items-center justify-center rounded bg-white font-sans text-xs text-zinc-400 dark:bg-zinc-800">↓</kbd>
                                            <kbd className="flex h-5 w-5 items-center justify-center rounded bg-white font-sans text-xs text-zinc-400 dark:bg-zinc-800">↑</kbd>
                                            Navegar
                                        </span>
                                    </div>
                                    <div className="text-[10px] text-zinc-500 font-medium">
                                        <span className="flex items-center gap-1.5">
                                            <kbd className="flex h-5 w-auto px-1.5 items-center justify-center rounded bg-white font-sans text-xs text-zinc-400 dark:bg-zinc-800">Esc</kbd>
                                            Fechar
                                        </span>
                                    </div>
                                </div>
                            </Combobox>
                        </Dialog.Panel>
                    </Transition.Child>
                </div>
            </Dialog>
        </Transition.Root>
    );
}