'use client'

import { useEffect, useRef, useState, type MouseEvent } from 'react'
import Link from 'next/link'
import { usePathname } from 'next/navigation'
import saws from '../assets/saws.png'
import SocialMediaLinks from './social-media-links'
import './site-header.css'

const menuLinks = [
  { label: 'Home', href: '/' },
  { label: 'About', href: '/about-us' },
  { label: 'Plans', href: '/plans' },
  { label: 'Contact', href: '/contact' },
] as const

const ctaHref = '/contact'

function isActivePath(pathname: string, href: string) {
  if (href === '/') return pathname === '/'
  return pathname === href || pathname.startsWith(`${href}/`)
}

export default function SiteHeader() {
  const pathname = usePathname()
  const menuToggleRef = useRef<HTMLInputElement>(null)
  const [scrolled, setScrolled] = useState(false)
  const [pendingPath, setPendingPath] = useState<string | null>(null)

  const activePath = pendingPath ?? pathname

  useEffect(() => {
    setPendingPath(null)
  }, [pathname])

  useEffect(() => {
    const onScroll = () => setScrolled(window.scrollY > 24)
    onScroll()
    window.addEventListener('scroll', onScroll, { passive: true })
    return () => window.removeEventListener('scroll', onScroll)
  }, [])

  const closeMobileMenu = () => {
    if (menuToggleRef.current) {
      menuToggleRef.current.checked = false
    }
  }

  const handleNavClick =
    (href: string) => (event: MouseEvent<HTMLAnchorElement>) => {
      setPendingPath(href)
      closeMobileMenu()
      event.currentTarget.blur()
    }

  return (
    <header className="site-header-wrapper">
      <nav
        className={`site-header${scrolled ? ' site-header--scrolled' : ''}`}
        aria-label="Main navigation"
      >
        <div className="site-header-content">
          <Link href="/" className="site-header-logo" onClick={handleNavClick('/')}>
            <img src={saws.src} alt="Sculpted Arc" className="site-header-logo-img" />
          </Link>

          <div className="site-header-nav desktop-menu">
            {menuLinks.map((link) => {
              const active = isActivePath(activePath, link.href)
              return (
                <Link
                  key={link.label}
                  href={link.href}
                  className={`menu-item${active ? ' menu-item--active' : ''}`}
                  aria-current={active ? 'page' : undefined}
                  onClick={handleNavClick(link.href)}
                >
                  {link.label}
                </Link>
              )
            })}
          </div>

          <div className="site-header-actions desktop-actions">
            <SocialMediaLinks
              className="site-header-social"
              linkClassName="site-header-social-link"
            />
            <Link href={ctaHref} className="site-header-cta">
              Get a quote
            </Link>
          </div>

          <div className="mobile-menu">
            <input
              ref={menuToggleRef}
              type="checkbox"
              id="mobile-nav-toggle"
              className="mobile-menu-checkbox"
            />
            <label
              htmlFor="mobile-nav-toggle"
              className="burger-icon"
              aria-controls="mobile-nav-menu"
            >
              <span className="burger-icon-menu" aria-hidden="true">
                &#9776;
              </span>
              <span className="burger-icon-close" aria-hidden="true">
                &times;
              </span>
            </label>
            <div id="mobile-nav-menu" className="mobile-dropdown">
              <div className="mobile-dropdown-inner">
                {menuLinks.map((link) => {
                  const active = isActivePath(activePath, link.href)
                  return (
                    <Link
                      key={link.label}
                      href={link.href}
                      className={`menu-item mobile-dropdown-item${active ? ' menu-item--active' : ''}`}
                      aria-current={active ? 'page' : undefined}
                      onClick={handleNavClick(link.href)}
                    >
                      {link.label}
                    </Link>
                  )
                })}
                <Link
                  href={ctaHref}
                  className="site-header-cta site-header-cta--mobile"
                  onClick={handleNavClick(ctaHref)}
                >
                  Get a quote
                </Link>
                <SocialMediaLinks
                  className="site-header-social site-header-social--mobile"
                  linkClassName="site-header-social-link"
                />
              </div>
            </div>
          </div>
        </div>
      </nav>
    </header>
  )
}