<script setup lang="ts">
// Sticky top nav with logo, anchor links, language toggle, login + demo CTA.
// Ported from landing-sections.jsx Nav (light mode, production subset).
import { computed, ref } from 'vue'
import { useRoute } from 'vue-router'
import { APP_URL } from '~/utils/landingTokens'
import { useTheme, useCopy, useLang, toggleLang, scrollToAnchor, goToSection } from '~/composables/useLanding'

const t = useTheme()
const copy = useCopy()
const lang = useLang()
const route = useRoute()

const mobileOpen = ref(false)

const items = computed(() => [
  { label: copy.value.nav.product, href: '/#suite' },
  { label: copy.value.nav.security, href: '/#sovereignty' },
  { label: copy.value.nav.whitelabel, href: '/#whitelabel' },
  { label: copy.value.nav.pricing, href: '/#pricing' },
  { label: copy.value.nav.docs, href: '/docs' },
])

function onLogo(e: MouseEvent) {
  // On the homepage, scroll to top in place; from a sub-page let NuxtLink route home.
  if (route.path === '/') {
    e.preventDefault()
    window.scrollTo({ top: 0, behavior: 'smooth' })
  }
}

function onNav(e: MouseEvent, href: string) {
  if (href.includes('#') && route.path === '/') {
    e.preventDefault()
    scrollToAnchor(href.slice(href.indexOf('#')))
  }
  mobileOpen.value = false
}

function onMobileLink(e: MouseEvent, href: string) {
  onNav(e, href)
  mobileOpen.value = false
}
</script>

<template>
  <header :style="{
    position: 'sticky', top: '0', zIndex: 100,
    background: 'rgba(250,250,247,0.84)',
    backdropFilter: 'blur(14px)', WebkitBackdropFilter: 'blur(14px)',
    borderBottom: `1px solid ${t.border}`,
  }">
    <div :style="{
      maxWidth: '1280px', margin: '0 auto',
      padding: `18px clamp(20px, 5vw, 64px)`,
      display: 'flex', alignItems: 'center', justifyContent: 'space-between',
    }">
      <NuxtLink to="/" :style="{ display: 'flex', alignItems: 'center', gap: '12px', cursor: 'pointer' }" @click="onLogo">
        <BrandNodeMark :size="32" :fg="t.fg" :accent="t.signal" />
        <div :style="{ fontFamily: '\'JetBrains Mono\', monospace', fontWeight: 600, fontSize: '16px', letterSpacing: '-0.02em', color: t.fg }">dezky</div>
      </NuxtLink>

      <!-- Desktop nav cluster — hidden on mobile via scoped CSS -->
      <nav class="nav-desktop" :style="{ display: 'flex', alignItems: 'center', gap: '36px' }">
        <NuxtLink
          v-for="(it, i) in items" :key="i" :to="it.href"
          :style="{ fontFamily: '\'Inter\', sans-serif', fontSize: '14px', color: t.fgMuted, letterSpacing: '-0.005em' }"
          @click="onNav($event, it.href)"
        >{{ it.label }}</NuxtLink>
      </nav>

      <!-- Desktop CTA cluster — hidden on mobile via scoped CSS -->
      <div class="nav-desktop" :style="{ display: 'flex', alignItems: 'center', gap: '14px' }">
        <button
          :style="{
            background: 'transparent', border: `1px solid ${t.border}`,
            color: t.fgMuted, fontSize: '11px', padding: '6px 10px', borderRadius: '4px',
            fontFamily: '\'JetBrains Mono\', monospace', letterSpacing: '0.06em', textTransform: 'uppercase',
            whiteSpace: 'nowrap',
          }"
          @click="toggleLang()"
        >{{ lang === 'da' ? 'da · en' : 'en · da' }}</button>
        <a :href="APP_URL" :style="{ fontFamily: '\'Inter\', sans-serif', fontSize: '14px', color: t.fgMuted }">{{ copy.nav.login }}</a>
        <LandingBtn variant="primary" @click="goToSection('#final-cta', route.path)">{{ copy.nav.cta }} →</LandingBtn>
      </div>

      <!-- Hamburger — visible only on mobile via scoped CSS -->
      <button
        class="nav-hamburger"
        :aria-label="mobileOpen ? 'Close menu' : 'Open menu'"
        :aria-expanded="mobileOpen"
        :style="{
          flexDirection: 'column', justifyContent: 'center', alignItems: 'center',
          gap: '5px', background: 'transparent', border: 'none', cursor: 'pointer',
          padding: '6px', borderRadius: '4px',
        }"
        @click="mobileOpen = !mobileOpen"
      >
        <!-- Three bar lines; top/bottom rotate to X when open -->
        <span :style="{
          display: 'block', width: '22px', height: '2px',
          background: t.fg, borderRadius: '2px',
          transition: 'transform 0.2s, opacity 0.2s',
          transform: mobileOpen ? 'translateY(7px) rotate(45deg)' : 'none',
        }" />
        <span :style="{
          display: 'block', width: '22px', height: '2px',
          background: t.fg, borderRadius: '2px',
          transition: 'opacity 0.2s',
          opacity: mobileOpen ? 0 : 1,
        }" />
        <span :style="{
          display: 'block', width: '22px', height: '2px',
          background: t.fg, borderRadius: '2px',
          transition: 'transform 0.2s, opacity 0.2s',
          transform: mobileOpen ? 'translateY(-7px) rotate(-45deg)' : 'none',
        }" />
      </button>
    </div>

    <!-- Mobile dropdown panel — JS-toggled, SSR-safe (visibility is CSS-controlled above 768px) -->
    <div
      v-if="mobileOpen"
      class="nav-mobile-panel"
      :style="{
        background: 'rgba(250,250,247,0.97)',
        borderTop: `1px solid ${t.border}`,
        padding: '24px clamp(20px, 5vw, 64px) 32px',
        display: 'flex', flexDirection: 'column', gap: '0',
      }"
    >
      <NuxtLink
        v-for="(it, i) in items" :key="i" :to="it.href"
        :style="{
          fontFamily: '\'Inter\', sans-serif', fontSize: '16px', color: t.fgMuted,
          letterSpacing: '-0.005em', padding: '14px 0',
          borderBottom: `1px solid ${t.border}`,
          display: 'block',
        }"
        @click="onMobileLink($event, it.href)"
      >{{ it.label }}</NuxtLink>

      <div :style="{ display: 'flex', alignItems: 'center', gap: '14px', paddingTop: '24px', flexWrap: 'wrap' }">
        <button
          :style="{
            background: 'transparent', border: `1px solid ${t.border}`,
            color: t.fgMuted, fontSize: '11px', padding: '6px 10px', borderRadius: '4px',
            fontFamily: '\'JetBrains Mono\', monospace', letterSpacing: '0.06em', textTransform: 'uppercase',
            whiteSpace: 'nowrap',
          }"
          @click="toggleLang()"
        >{{ lang === 'da' ? 'da · en' : 'en · da' }}</button>
        <a
          :href="APP_URL"
          :style="{ fontFamily: '\'Inter\', sans-serif', fontSize: '14px', color: t.fgMuted }"
          @click="mobileOpen = false"
        >{{ copy.nav.login }}</a>
        <LandingBtn variant="primary" @click="() => { goToSection('#final-cta', route.path); mobileOpen = false }">{{ copy.nav.cta }} →</LandingBtn>
      </div>
    </div>
  </header>
</template>

<style scoped>
/* Desktop clusters: visible by default, hidden on mobile */
.nav-desktop {
  display: flex;
}

/* Hamburger: hidden by default, shown on mobile */
.nav-hamburger {
  display: none;
}

/* Mobile panel: always rendered when v-if is true, but constrained to mobile */
@media (max-width: 768px) {
  .nav-desktop {
    display: none !important;
  }

  .nav-hamburger {
    display: flex;
  }
}

/* Ensure the mobile panel is not shown on desktop even if somehow open */
@media (min-width: 769px) {
  .nav-mobile-panel {
    display: none !important;
  }
}
</style>
