'use client'
import Link from 'next/link'
import { usePathname } from 'next/navigation'
import { Logo } from '@/components/logo'
import { Menu, X } from 'lucide-react'
import { Button } from '@/components/ui/button'
import React from 'react'
import { cn } from '@/lib/utils'
import { type } from '@/lib/typography'
import { ThemeToggle } from '@/components/theme-toggle'

const menuItems = [
    { name: 'صفحه اصلی', href: '/' },
    { name: 'دانشنامه', href: '/blog' },
    { name: 'راه حل‌ها', href: '/solutions' },
    { name: 'مشاوره سازمانی', href: '/consulting' },
    // { name: 'قیمت‌گذاری', href: '/pricing' },
    // { name: 'آزمایشگاه فیپ', href: '/playground' },
    { name: 'درباره ما', href: '/about' },
]

/** Outer gutter — matches hero image wrapper (`px-6 md:px-2`). */
const siteGutterClass = 'px-6 md:px-2 lg:px-6'

/** Bar width — matches hero image inner container (`max-w-5xl md:max-w-4xl`). */
const headerBarClass = 'mx-auto w-full max-w-5xl md:max-w-4xl lg:max-w-6xl'

function isLinkActive(pathname: string, href: string): boolean {
    if (href === '/') return pathname === '/'
    return pathname === href || pathname.startsWith(href + '/')
}

export const HeroHeader = () => {
    const pathname = usePathname()
    const [menuState, setMenuState] = React.useState(false)
    const [isScrolled, setIsScrolled] = React.useState(false)

    React.useEffect(() => {
        const handleScroll = () => {
            setIsScrolled(window.scrollY > 50)
        }
        window.addEventListener('scroll', handleScroll)
        return () => window.removeEventListener('scroll', handleScroll)
    }, [])

    React.useEffect(() => {
        document.body.style.overflow = menuState ? 'hidden' : ''
        return () => {
            document.body.style.overflow = ''
        }
    }, [menuState])

    return (
        <header className="contents">
            <nav
                data-state={menuState ? 'active' : undefined}
                aria-label="ناوبری اصلی"
                className={cn(
                    'fixed inset-x-0 top-0 z-20 w-full pt-[max(0.5rem,env(safe-area-inset-top,0px))]',
                    siteGutterClass
                )}>
                <div
                    className={cn(
                        headerBarClass,
                        'mt-2 rounded-md border border-border/10 bg-background/30 backdrop-blur-md transition-[max-width,box-shadow,background-color] duration-300',
                        isScrolled && 'bg-background/20 shadow-lg lg:max-w-4xl'
                    )}>
                    <div className="relative flex h-14 items-center justify-between gap-3 px-3 sm:gap-4 sm:px-4 lg:h-16">
                        <div className="flex min-w-0 shrink items-center">
                            <Logo />
                        </div>

                        <div className="pointer-events-none absolute inset-x-0 hidden lg:flex lg:items-center lg:justify-center">
                            <ul className={cn("pointer-events-auto flex gap-1", type.nav)}>
                                {menuItems.map((item, index) => {
                                    const active = isLinkActive(pathname ?? '', item.href)
                                    return (
                                        <li key={index}>
                                            <Link
                                                href={item.href}
                                                className={cn(
                                                    'relative rounded-md p-2 px-4 text-muted-foreground transition-all duration-300 hover:bg-accent/20 hover:text-foreground',
                                                    active && 'bg-accent/40 text-foreground'
                                                )}>
                                                <span className="relative z-10">{item.name}</span>
                                            </Link>
                                        </li>
                                    )
                                })}
                            </ul>
                        </div>

                        <div className="flex shrink-0 items-center gap-1 sm:gap-1.5">
                            <ThemeToggle />
                            <Button
                                type="button"
                                variant="ghost"
                                size="icon-lg"
                                onClick={() => setMenuState((open) => !open)}
                                aria-expanded={menuState}
                                aria-controls="mobile-nav"
                                aria-label={menuState ? 'بستن منو' : 'باز کردن منو'}
                                className="relative rounded-lg lg:hidden">
                                <Menu
                                    aria-hidden
                                    className="size-5 transition-all duration-200 in-data-[state=active]:rotate-180 in-data-[state=active]:scale-0 in-data-[state=active]:opacity-0"
                                />
                                <X
                                    aria-hidden
                                    className="absolute inset-0 m-auto size-5 -rotate-180 scale-0 opacity-0 transition-all duration-200 in-data-[state=active]:rotate-0 in-data-[state=active]:scale-100 in-data-[state=active]:opacity-100"
                                />
                            </Button>
                        </div>
                    </div>

                    <div
                        id="mobile-nav"
                        className={cn(
                            'overflow-hidden border-t border-border/10 transition-[max-height,opacity] duration-300 lg:hidden',
                            menuState ? 'max-h-[min(70vh,28rem)] opacity-100' : 'max-h-0 border-transparent opacity-0'
                        )}>
                        <ul className={cn("flex flex-col px-3 py-2 sm:px-4", type["nav-mobile"])}>
                            {menuItems.map((item, index) => {
                                const active = isLinkActive(pathname ?? '', item.href)
                                return (
                                    <li key={index}>
                                        <Link
                                            href={item.href}
                                            onClick={() => setMenuState(false)}
                                            className={cn(
                                                'block w-full rounded-md p-2 px-4 text-muted-foreground transition-all duration-300 hover:bg-accent/20 hover:text-foreground',
                                                active && 'bg-accent/40 text-foreground'
                                            )}>
                                            <span className="relative z-10">{item.name}</span>
                                        </Link>
                                    </li>
                                )
                            })}
                        </ul>
                    </div>
                </div>
            </nav>
        </header>
    )
}