/* ============================================================
   Pine Creek — site interactions
   - Mobile nav (hamburger) toggle
   - Smooth-scroll for in-page anchors with fixed-header offset
   - Image galleries (prev/next, dots, autoplay, swipe)
   - Sticky-nav shadow on scroll
   ============================================================ */

const hamburger = document.getElementById('hamburger'),
      mainNav = document.querySelector('#mainNav ul'),
      navItem = document.getElementsByClassName('nav-item')

// --- Mobile nav ------------------------------------------------
const toggleNav = () => {
        mainNav.classList.toggle('in')
        hamburger.classList.toggle('in')
      },
      closeNav = () => {
        mainNav.classList.remove('in')
        hamburger.classList.remove('in')
      }

hamburger.onclick = toggleNav
hamburger.addEventListener('keydown', (e) => {
  if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); toggleNav() }
})

// --- Smooth scroll with fixed-header offset --------------------
const scrollToTarget = (hash) => {
  const target = hash && document.querySelector(hash)
  if (!target) return false
  const header = document.getElementById('mainNav')
  const headerHeight = header ? header.offsetHeight : 0
  const y = window.pageYOffset + target.getBoundingClientRect().top - headerHeight - 8
  window.scrollTo({ top: y, behavior: 'smooth' })
  return true
}

for (let i = 0; i < navItem.length; i++) {
  navItem[i].onclick = function (e) {
    const href = this.getAttribute('href') || ''
    closeNav()
    if (href.startsWith('#') && scrollToTarget(href)) {
      e.preventDefault()
    }
  }
}

// Also offset any in-page anchor (hero buttons, etc.)
document.querySelectorAll('a[href^="#"]:not(.nav-item)').forEach((a) => {
  a.addEventListener('click', (e) => {
    const href = a.getAttribute('href')
    if (href.length > 1 && scrollToTarget(href)) e.preventDefault()
  })
})

window.addEventListener('load', () => scrollToTarget(location.hash))
window.addEventListener('hashchange', () => scrollToTarget(location.hash))

// --- Sticky nav shadow ----------------------------------------
const navEl = document.getElementById('mainNav')
const onScroll = () => {
  if (window.pageYOffset > 20) navEl.classList.add('scrolled')
  else navEl.classList.remove('scrolled')
}
window.addEventListener('scroll', onScroll, { passive: true })
onScroll()

// --- Lightbox --------------------------------------------------
const lightbox = document.getElementById('lightbox')
let lbSrcs = [], lbAlts = [], lbIndex = 0
if (lightbox) {
  const lbImg = lightbox.querySelector('.lightbox-img'),
        lbCap = lightbox.querySelector('.lightbox-caption'),
        lbPrev = lightbox.querySelector('.lightbox-arrow.prev'),
        lbNext = lightbox.querySelector('.lightbox-arrow.next'),
        lbClose = lightbox.querySelector('.lightbox-close')

  const render = () => {
    lbImg.src = lbSrcs[lbIndex]
    lbImg.alt = lbAlts[lbIndex] || ''
    lbCap.textContent = lbAlts[lbIndex] || ''
  }
  window.openLightbox = (srcs, alts, i) => {
    lbSrcs = srcs; lbAlts = alts; lbIndex = i
    render()
    lightbox.hidden = false
    document.body.style.overflow = 'hidden'
  }
  const close = () => { lightbox.hidden = true; document.body.style.overflow = '' }
  const lbGo = (n) => { lbIndex = (n + lbSrcs.length) % lbSrcs.length; render() }

  lbPrev.addEventListener('click', (e) => { e.stopPropagation(); lbGo(lbIndex - 1) })
  lbNext.addEventListener('click', (e) => { e.stopPropagation(); lbGo(lbIndex + 1) })
  lbClose.addEventListener('click', close)
  lightbox.addEventListener('click', (e) => {
    if (e.target === lbImg) lbGo(lbIndex + 1)
    else if (!e.target.closest('.lightbox-arrow') && !e.target.closest('.lightbox-close')) close()
  })
  document.addEventListener('keydown', (e) => {
    if (lightbox.hidden) return
    if (e.key === 'Escape') close()
    else if (e.key === 'ArrowLeft') lbGo(lbIndex - 1)
    else if (e.key === 'ArrowRight') lbGo(lbIndex + 1)
  })
}

// --- Galleries -------------------------------------------------
document.querySelectorAll('.gallery').forEach((gallery) => {
  const imgs = Array.from(gallery.querySelectorAll('.gallery-img')),
        prev = gallery.querySelector('.gallery-arrow.prev'),
        next = gallery.querySelector('.gallery-arrow.next'),
        dotsWrap = gallery.querySelector('.gallery-dots')
  if (!imgs.length) return

  let index = 0
  let timer = null

  // Build dots
  const dots = imgs.map((_, i) => {
    const dot = document.createElement('button')
    dot.className = 'gallery-dot' + (i === 0 ? ' is-active' : '')
    dot.setAttribute('aria-label', 'Go to image ' + (i + 1))
    dot.addEventListener('click', () => { go(i); restart() })
    dotsWrap && dotsWrap.appendChild(dot)
    return dot
  })

  const go = (n) => {
    imgs[index].classList.remove('is-active')
    dots[index] && dots[index].classList.remove('is-active')
    index = (n + imgs.length) % imgs.length
    imgs[index].classList.add('is-active')
    dots[index] && dots[index].classList.add('is-active')
  }

  const start = () => { timer = setInterval(() => go(index + 1), 6000) }
  const stop = () => { clearInterval(timer); timer = null }
  const restart = () => { stop(); start() }

  prev && prev.addEventListener('click', () => { go(index - 1); restart() })
  next && next.addEventListener('click', () => { go(index + 1); restart() })

  // Pause on hover (desktop)
  gallery.addEventListener('mouseenter', stop)
  gallery.addEventListener('mouseleave', start)

  // Touch swipe
  let startX = 0
  gallery.addEventListener('touchstart', (e) => { startX = e.touches[0].clientX; stop() }, { passive: true })
  gallery.addEventListener('touchend', (e) => {
    const dx = e.changedTouches[0].clientX - startX
    if (Math.abs(dx) > 40) go(index + (dx < 0 ? 1 : -1))
    start()
  })

  // Click image to open in lightbox (opens at the currently shown slide)
  const track = gallery.querySelector('.gallery-track')
  if (track && window.openLightbox) {
    const srcs = imgs.map((i) => i.getAttribute('src'))
    const alts = imgs.map((i) => i.alt)
    track.classList.add('zoomable')
    track.addEventListener('click', () => window.openLightbox(srcs, alts, index))
  }

  start()
})

// --- Footer year ----------------------------------------------
const yearEl = document.getElementById('year')
if (yearEl) yearEl.textContent = new Date().getFullYear()